ӭ
ղرվ
 
 
   ǰλ>>վҳ>>ϸϢ

ϵͳѧоĿ¼2

ʱ䣺2013-05-12 5523


սȺΪģо
ʤ1,2, ˾1, Ⱥ1, 1
(1.ѧϢսָѵв, 100091; 2.¿ѧԺ˳о, 100091)
ժҪȺΪģǵǰdzȵһоҲͨģֶоִսҪ漰һҪݡȺΪģظ֣Ӿ˳ѧĽǶȶԵǰȺΪģĻۺͻԼӦۺϵĸԵǰо״Ͻܽᡣ
ؼʣȺ壻ȺΪΪģսģ
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0197-06
Survey of Group Behavior Modeling for War
LIU De-sheng1,2, SI Guang-ya1, JIANG Ya-qun1, LUO Pi1
(1. The Department of Information Operation & Command Training, NDU of PLA, Beijing 100091, China;
2. Military Operational Research and Analysis Institute, Military Science Institute, Beijing 100091, China)
Abstract: It is currently a very hot area of research for group behavior modeling. It is also an important need to be addressed by means of simulation in the social domain of modern war. Beginning with the pertinent concepts of group behavior modeling, the basic theory and basic methods and application of group behavior modeling were introduced comprehensively from the perspective of military operations research. Finally, the status of the current study of group behavior modeling was summarized from the overall.
Key words: group; group behavior; behavior modeling; war simulation
 
 
 
 
 
OpenGLķ˻˲зо
ޱ1, 1, o2, 1
(1.ϺѧеԶѧԺ, Ϻ 200072; 2.ձɽѧȻѧо, ձɽ 700-8530)
ժҪеķ潨ģУΪ˼ٸԣཫģͼΪԲʵԶC++Builder 6.0áOpen GLͼο⽨3Dͻ˫㲽зϵͳöؽڴģ㲿ʵְǰ֧š㲿תĶֲ̬ʽиֲ̬תݻ˽ŸżӴ״̬ı仯̬лͬIJ̬ʽ㲽еʵǿ˻˲еԡϵͳĿƲֲλ÷ϵ߿Ʒͨģ͵ĶؽڶѧģЧʵ˻˵ȶз棬ʵ˲йеʵʱ̬
ؼʣ˻ˣOpen GL߿ƣ̬л з
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0203-06
Bipedal Walking Simulation System Using OpenGL for Humanoid Robot
SONG Wei1, ZHANG Ya-nan1, MINAMI Mamoru2, LIU Xu1
(1. School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200072, China;
2. School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan)
Abstract: Foot model is usually considered as one point or a circle in most bipedal walking simulations for decreasing the modeling difficulty. However, such simulations are less persuasive because the foot model is much different from the real human foot. The dynamic model of a bipedal humanoid robot composed by multi-links was set up by using a graphic presentation software Open GL under C++ Builder 6.0 environment. Several different walking styles were analyzed that may exist in a walking sequence including the style of foot rotating with toes-contacting, to make the walking of the robot more like human beings. Switching among those styles depended on different contact situations between the foot and the ground. Control strategy for bipedal walking simulation utilized position feedback and sinusoidal input, and stable walking with dynamic walking styles changing was obtained in the simulation.
Key words: humanoid robot; Open GL; walking control; walking styles changing; walking simulation
 
 
 
 
 
 
ʾĶ๩Ӧ̶
ޱ, η˧, Ҷɷ
(ѧеѧѧԺ, 315211)
ժҪԹӦҵһҵȺڶҹӦ̶ͬһֲƷֱҵʵʷ䶩Ӧ֮ʾⷽǶ⡣ʾֱһ̶ԶӦ̵Ķģ͡ǵҵʵIJȷԣͨɢϵͳ֤˻ʾķԲܴԴϱ֤ҵ´Ķ˳ɣһӦȺˮƽʵӦŻ
ؼʣʾ⣻๩Ӧ̣䣻
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0209-07
Simulation on Production Load Equilibrium Order Allocation within Multi-suppliers
XIANG Wei, SONG Fa-shuai, YE Fei-fan
(Faculty of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, China)
Abstract: As downstream enterprises of the supply chain face to order the same kind of product within suppliers of an industrial cluster, the order allocation problem was studied respectively either based on the enterprises current adopted order allocation strategy or based on suppliers production load equilibrium strategy. Two order allocation models of a manufacturer with multiple suppliers based on the production capacity and production load equilibrium were proposed. Considering the uncertainty of demand and production capacity of enterprise actual operating process, the discrete system simulation was used to verify that the production load equilibrium strategy could not only guarantee the orders lead time from the point of view of the available manufacturing resources, but also lead to promote the whole supplier groups operation level, so as to realize the optimization of the entire supply chain.
Key words: production load equilibrium; multi-suppliers; order allocation; simulation
 
 
 
 
 
Ϣ-ռӳܿռ佨ģ
Ԯ1,2, 1, ¹1,2
(1.йѧԺ㼼о, 100190; 2.йѧԺоԺ, 100190)
ժҪܿռɴľмϢ豸ɣЩ豸ϢռռĽӿڣ豸֮ĻϵʵĹϵ͹򡣻ڱ彨ģϢ-ӳĽģܿռģͣӶڷӳ缰ͬʱЩΪϢռ豸Ķ̬滮ṩݡ˻Ϣ-ӳķ滮ֽ֤ģЧԡ
ؼʣʼ㣻ܿռ䣻壻ģ·
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0216-04
Modeling Method for Smart Space Based on Cyber-Physical Space Mapping
CHEN Yuan-fei1,2, ZHU Zhen-min1, LU Xiao-wen1,2
(1. Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, China;
2. Graduate School, Chinese Academy of Sciences, Beijing 100190, China)
Abstract: Smart space is composed of numerous information devices with computing ability. Due to the heterogeneity of the devices, there are big obstacles for them to do interoperation and cooperation. In addition, information devices are the interfaces of information space and physical space which reflect the relations and rules not only between the device services but also between the entities in physical world. A modeling method was proposed based on the cyber-physical space mapping in smart space so as to reflect the physical world and its rules, and then guide device services routing and reorganization according to these rules. A cyber-physical space mapping based service routing method proves the validity of this modeling approach.
Key words: pervasive computing; smart space; ontology; modeling; service routing
 
 
 
 
 
 
ϵԿϵͳͨͨԽģо
, Է, , , Ф˳ƽ
(Ƽѧӿѧ빤ѧԺ, ɳ 410073)
ժҪԻƽ̨ϵԿۺϷϵͳͨͨԹܵʵ󣬸ͨͨģɡܼ̣еĹؼģͽ˷оص·ļҰFOVField Of Viewжģ͡ʵ˷ʵ飬֤ģͺͷЧԡͨͨģоΪϵԿϵͳʵֵ춨˻ҲΪϢϵͳװоԼģṩο
ؼʣͨͨԣ·ģҰ(FOV)ϵԿ
ͼţTN91      ױʶ룺A      ±ţ1004-731X (2013) 02-0220-08
Communication Connectivity Modeling
for System-of-systems Combat Simulation System
MIN Tao, ZHAO Feng, YANG Jian-hua, LI Dun, XIAO Shun-ping
(Institute of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)
Abstract: Aiming at the practical requirements for the communication connectivity function in the system-of-systems combat simulation system based on weapon platforms, the construction, function and simulation flow of the communication connectivity module were proposed, and critical models were analyzed, and especially the path loss computation and FOV determining models were described emphatically. Simulation result verifies the efficiency. The successful exploitation of the communication connectivity module will supply the implementation of system-of-systems combat simulation system the basis, and will supply the analysis, research, development, evaluation, modeling and simulation of the electronic information systems and equipments with reference.
Key words: communication connectivity; path loss; field of view (FOV); system-of-systems combat simulation
 
 
 
 
 
 
CPNŶϵͳģܷ
1,2, ½1, 1, κ1
(1.ϷʹҵѧϢѧԺ, Ϸ 230009; 2.ѧѧԺ, 232001)
ժҪŶģһ־ܷģͣնе̡ŶӹͷҪأŶϵͳתΪɫPetriģ͵ĽģCPN ToolsģмmonitorģʹData Collectorɼݣжģ͵ָܷ۹ڷĽģһ衣ֽģͷҪϵͳκεļ޶Զģ͵κηܷչ˴ͳŶϵͳоΧкǿԣһЩչŶĽģͷ翼Ƿ̨𻵺άʱչģֻͣԻŶԼ޸ļɽģܷģ͵ĸԣλĽģ˷˻Petri״̬ըȱ㣬ڴģĸŶϵͳ
ؼʣŶϵͳɫPetriģ棻ܷ
ͼţTP302.7      ױʶ룺A      ±ţ1004-731X (2013) 02-0228-07
Queuing System Modeling and Performance Analysis Based on CPN Simulation
FANG Huan1,2, LU Yang1, HUANG Zhen-jin1, WEI Zhen1
(1. School of Computer & Information, Hefei University of Technology, Hefei 230009, China;
2. College of Science, Anhui University of Science & Technology, Huainan 232001, China)
Abstract: Queuing network is a classic performance analysis model. According with three elements of entry process, queuing rules and servers in queuing, modeling rules transforming queuing system to hierarchical Colored Petri Nets were proposed. It added monitors to monitor the simulation state of the queuing model, and used Data Collector to collect corresponding data to further performance analysis and evaluation. Lastly, general modeling and analyzing steps of the method proposed were concluded for users. This modeling and analysis method based on simulation doesnt impose any assumption and limitation to queuing system, it can perform all aspects analysis of a queuing system, and extends the study scopes of traditional queuing system, so it has large flexibility. The modeling and performance analysis of some extended queuing network, such as queuing model with breakdown and repairs time of servers, can be done directly from basic queuing network through only a few modifications, so it has great reusability. Hierarchical modeling method overcomes state explosion problem faced by basic Petri Nets, and it can be applied in large-scale complex queuing systems.
Key words: queuing system, Colored Petri Nets, modeling and simulation, performance analysis
 
 
 
 
 
 
 
CPU-GPU칹ȺFDTD㷨о
1,2, ˳1, ´3
(1.ƼѧϢѧԺ, 100083; 2.⹫˾, 100193; 3.Ƽ޹˾, 214315)
ժҪʱ޲ַ(FDTD)ѧ˹Τǿѧ빤̼һdzҪ㷨ͨFDTD˹Τȷ̵ֱʱķڶGPU칹ȺϵͳϵIJм㷨OpenCLCUDAMPIģʵ˲гĿǰNVIDIAATIGPUƽ̨ϣٵIJFDTDCPUг8CPU˵MPIг򣬷ֱ˳81.5ļ٣ڶGPUϻ˽ӽԼٵչܡ
ؼʣų棻ʱ޲ַGPUȺ
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0235-06
Accelerating Parallel FDTD on CPU-GPU Heterogeneous Cluster System
SHAO Zong-you1,2, WANG Zhao-shun1, LIU Xin-chun3
(1. School of Information Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Dawning Information Industry Co., Ltd., Beijing 100193, China; 3. Wuxi City Cloud Computing Center Co., Ltd., Wuxi 214315, China)
Abstract: Finite-Difference Time-Domain (FDTD) for computational electrodynamics modeling techniques is an important algorithm in scientific and engineer computing applications. Parallel FDTD algorithms of time-dependent Maxwell's equations were investigated, and accelerated algorithms on a CPU-GPU heterogeneous cluster system were proposed. The parallel FDTD program was implemented in a hybrid model of OpenCL, CUDA and MPI. In state of the art GPU processors from both NVIDIA and ATI, the accelerated FDTD achieves speedup of 8 times and 1.5 times over a serial program on one CPU core and parallel program on 8 CPU cores, respectively. The parallel hybrid program also achieves an approximate linear speedup with multiple GPUs.
Key words: computational electrodynamics modeling; Finite-Difference Time-Domain; GPU; cluster
 
 
 
 
 
 
һָĽ״źżģ淽
, Է, , ,
(ѧѧӿѧ빤ѧԺ, ɳ 410073)
ժҪͳ״źżģ㷨ӣģͼЧʵͣԼźżĹ㷺ӦãԴ⣬һָĽ״źżģ淽˸Ľźżģͣݴ˹˷ϵͳ֤ĽķϵͳЧߣ֤˽ģͷģ͵ЧԡȷԣΪ״źżĹ㷺Ӧṩ֧š
ؼʣźż棻٣ģ״
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0241-05
Advanced Coherent Video Modeling and Simulation Method of Phased Array Radar
WANG Xiang, ZHAO Feng, MIN Tao, YANG Jian-hua, WANG Guo-yu
(School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)
Abstract: The traditional coherent video modeling method of phased array radars is complicated, the calculate efficiency is quite low, all of these problems are resistance to the application of coherent video simulation. Aiming at this problem, an advanced coherent video modeling method and simulation model of phased array radars was investigated, and then phased array radar coherent video simulation system was proposed. The simulation result verifies that calculation efficiency of simulation system is highly improved. All the work above proves the efficiency of modeling method including mathematical modules, which supports wide application of phased array radar coherent video simulation.
Key words: coherent video simulation; accelerate; modeling; radar
 
 
 
 
 
 
սЭͬʾϵͳо
վ1,2, ս1
(1.¿ѧԺ˳о, 100091; 2. 73311˾, 362200)
ժҪͳսϵͳǵû棬ٶ޸ĺ͵ʱ䳤Ϣ¶սٱʾĿ͹Ҫ⣬һֵ֧սЭͬʾϵͳϵͳĹģʽȻϵͳϵṹϵͳܽƣڴ˻ϣЭͬͱΪʵԭ˸˲ƲԼ㷨ݴ˻ơϵͳɽûЭͬӽʾ⣬ʵսʾ
ؼʣս; Эͬʾ; Ʋ;
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0246-05
Design of Coordinated Plotting and Displaying System of Warfighting Envision
LI Su-jun1,2, ZHAN Xiao-su1
(1. The Graduate School of Military Operational Research and Analysis, Institute of Military Technology, Beijing 100091, China;
2. Army 73311, Jinjiang 362200, China)
Abstract: Since the traditional plotting system of warfighting envision is single-user mode, its plotting and revising time is long, therefore it is not able to meet the requirement of information age. In order to solve the above problems, a Coordinated Plotting and Displaying System of Warfighting Envision (CPDSWE) based on computer was designed. Firstly, the work mode of the CPDSWE was described. Secondly, the system architecture and framework were designed. Then, coordinated management, plotting action and displaying action was described. Finally, concurrent control polices and algorithm were given, the filtration mechanism of data transfer was described. Using the CPDSWE, not only the problems of multi-user collaborative plotting activities and multi-angle displaying can be resolved, but also the rapidly creating and displaying of warfighting envision can be realized.
Key words: warfighting envision; coordinated plotting and displaying; control strategy; design
 
 
 
 
 
ģϸ̵Ⱥ㷨
(ҵѧе뽻ͨѧԺ, 650224)
ժҪԳȺ㷨ȱIJ㣬ĽռΪϸҺзõϸ壬ģϸ̣һµȺ㷨㷨нƣܹȻӶΪŻ㷨һµĽ׼ͨʵ֤㷨Чԣͬʱʵͨ򵥸Ľ㷨Դﵽȫš
ؼʣȺ; ϸ; Ż㷨;
ͼţTP18      ױʶ룺A      ±ţ1004-731X (2013) 02-0251-05
New Swarm Intelligence Algorithm Simulating Evolution Process of Bacterial Colony
LI Ming
(College of Machinery and Transportation, Southwest Forestry University, Kunming 650224, China)
Abstract: Traditional swarm intelligence algorithms lack of evolution ability and are easy to fall into premature convergence. Therefore, a new kind of swarm intelligence algorithm, called bacterial colony optimization (BCO) algorithm, was proposed. The solution space of the problem was considered as a certain culture medium. A single bacterium or a few bacteria were placed randomly in the space. The BCO algorithm was designed through simulating the evolution process of the bacterial colony. The BCO itself has a certain evolutionary mechanism and could be terminated naturally, which has given a new termination criterion for swarm intelligence algorithms. A series of simulation experiments on three test functions verify the effectiveness of the BCO algorithm. The simulation results show that the BCO algorithm can converge to the global optimization solution.
Key words: swarm intelligence; bacterial colony; optimization algorithm; evolutionary mechanism
 
 
 
 
 
Эͬ滮о
1, 2, 2, 1, ܳƽ1
(1.пƼѧͼʶ˹оϢҼصʵ, 人 430074;
2.繤о, 100074)
ժҪͨطڸεٶȣһֻڽ㷨ĴĶЭͬ滮÷ͨЭͬʱ㷨ĴۺУʹù滮ĺܹ㼯ʱͿռԼͬʱʹЭͬĿʱСʵ÷ܹﵽܺõЧ
ؼʣ㷨ٶȵأЭͬ滮
ͼţV448.22      ױʶ룺A      ±ţ1004-731X (2013) 02-0256-04
Cooperative Route Planning Method with Rendezvous
CHEN Zhao1, WANG Chang-qing2, ZHOU Qi-zhong2, FU Yang-guang1, ZHOU Cheng-ping1
(1. National Key Laboratory of Science & Technology on Multi-spectral Information Processing,
Institute for Pattern Recognition and Artificial Intelligence, Huazhong University of Science and Technology, Wuhan 430074, China;
2. Beijing Electro-mechanical Engineering Institute, Beijing 100074, China)
Abstract: Through adjusting the vehicles velocity of each section of the flight route, a multi-vehicle cooperative route planning method with rendezvous based on evolutionary algorithm was proposed. This method introduced cooperative time error of multi-vehicle into the cost function of evolutionary algorithm, which made route satisfying rendezvouss restricts of time and space, and at the same time made the cooperative time error of reaching target reducing as small as possible. The results of simulation experiments show that this method can make good effect.
Key words: rendezvous; evolutionary algorithm; velocity adjust; cooperative route planning
 
 
 
 
 
 
 
Ŵ㷨ķɻԭλŻ
1, 2, 1, 3
(1.չѧԺ, ̨ 264001; 2.չѧԺ, ̨ 264001; 3.ͧѧԺ, 116018)
ժҪ״Ŵ㷨Żɻԭλ̡ԭλԼࡢŻѵ⣬ԭλŻģͣݹԼص㣬һֳʼȺ·֤˳ʼȺи嶼㹤ԼĽ˻Ŵ㷨⡣֤㷨ԼĽЧԡ
ؼʣGAɻ죻ԭλŻģ
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0260-05
Optimization of Plane's Primary Periodic Maintenance Workflow
Based on Genetic Algorithm
MA Deng-wu1, ZHANG Yong-liang2, LV Xiao-feng1, WANG Hao-yu3
(1. Naval Aeronautical and Astronautical University, Yantai 264001, China;
2. Naval Aeronautical and Astronautical University, Yantai 264001, China; 3. Dalian Naval Academy, Dalian 116018, China)
Abstract: It is the first time to use Genetic Algorithm in the optimization of planes periodic maintenance primary workflow. Periodic maintenance primary workflow goes with many constraints and is hard to optimize, for which, the optimization model of primary workflow was built. According to the characteristics of the work sequence constraints, a new method to initiate the pop was proposed to ensure all of the individuals meet the work sequence constraints, and the Simple Genetic Algorithm was improved and used to solve the problem. The simulation results demonstrate that the algorithm is useful and effective.
Key words: Genetic Algorithm; planes periodic maintenance; primary work; optimization model of primary workflow
 
 
 
 
 
ڶǩѧϰͼԶע
1,2, 1, ɽ2, ܿ2
(1.պѧʵϵͳصʵ, 100191;
2.ʯʹѧϢѧԺ, 163318)
ժҪʵµͼݼϵĴģעһоѵ㡣һֻڶǩѧϰͼעʵ´ģͼ񼯺ϽԶעȡͼӾöѧϰضռɱעѧϰõÿͼĵעضȣȻһֵֶ̬ȷƵͱעʵضֵղһ޼ලϷں϶ͱעʵͼǩͨݼϵIJԱ˷Чԡ
ؼʣͼԶעǩѧϰעں
ͼţTP391      ױʶ룺A      ±ţ1004-731X (2013) 02-0265-05
Image Annotation Based on Multiple Feature Tag Relevance Learning
TIAN Feng1,2, SHEN Xu-kun1, DU Rui-shan2, ZHOU Kai2
(1. The State Key Laboratory of Virtual Reality Technology and Systems, Beihang University, Beijing 100191, China;
2. School of Computer and Information Technology, Northeast Petroleum University, Daqing 163318, China)
Abstract: An image annotation method was proposed based on multiple feature tag relevance learning (MFTRL), which aimed at tagging large-scale image collections in real environment by analyzing the correlation between tags and images represented by multiple visual features. First, a multiple label learning method was utilized to generate the relevance of tags and images in specific feature space. Then, an optimal threshold was set for each tag and corresponding single feature. So the output of many tag relevance learners driven by diverse features could be combined in the manner of combining multi- feature tag relevance. The experiments over the internet image set demonstrate that the proposed method is accurate and stable.
Key words: image automatic annotation; tag relevance learning; semantic annotation; feature fusion
 
 
 
 
 
 
dzˮ̺Ĵ߶ˮģ
, 翡, Ҧ
(ңпѧصʵ
(йѧԺңϢѧصʵҺͱʦѧңϢϵͳо), 100101)
ժҪάϵͳʵʵеоȵ㣬ˮҲеҪ֡ˮʵʱȾڶ࣬ȱԡԴ߶ˮ壬dzˮʵʱˮı̬ͬʱ⣬ʵʱˮӴĸͨĸºģ⣬ʵijЧˮĽڣһӰˮˮλ̣߳ıˮ̬һ棬ˮ̬ĸıӰˮĽӴ棬ıܵĸ㷨ܹ㷺ڴ˶ģӦС
ؼʣdzˮ̣棻߶ȳʵ
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0270-06
Simulation of Water Environment and Buoyancy
Based on Shallow Water Equations and Physical Engine
FANG Chao, YANG Chong-jun, YAO Xiao-jing
(State Key Laboratory of Remote Sensing Science (Jointly Sponsored by The Institute of Remote Sensing Applications
of Chinese Academy of Sciences and Beijing Normal University), Beijing 100101, China)
Abstract: The sense of reality in 3D system has been a research hotspot in virtual geographic environment and virtual reality. The simulation of water is an important part in natural environment. In the past years, lots of technologies have been developed for real-time rendering of water, but often lack the interaction with other bodies. Shallow water equations were used to figure out the water surface. At the same time, the physical engine was introduced to calculate the buoyancy of any body in water and the real-time effect of buoyancy was realized. The bodies and water are interacted with each other. On one hand, the body affects the water level and changes the surface of water, and on the other, the changes of the water level affects the buoyancy on the body. The algorithm can be widely used for simulation of shipping.
Key words: shallow water equations; physical engine; height field; virtual reality; virtual geographic environment
 
 
 
 
 
 
ϸֲԵļͼ񷽷
Ѧ, ׵», , ž
(ҵѧѧԺýصʵ, 100124)
ժҪͼһ񻯵άģͱʾͼеļαʾʽͼѳΪЧؽάѹ估ȾҪ֮һͳͼ񷽷Уάģ͵IJϴ̶ȵ죬Ӷ²Ϣϸ׼ȷʹعģͲһֻӦϸֲԵļͼɷͨԭʼع򣬲ûӦϸֵزɾи߼ξȵļͼЧعľȡʵ÷ЧģععģPSNRֵҲдߡ
ؼʣͼ񻯣Ӧϸ
ͼţTP391      ױʶ룺A      ±ţ1004-731X (2013) 02-0276-04
Geometry Images Based on Subdivision
XUE Juan, KONG De-hui, ZHANG Yong, ZHANG Juan
(Beijing Key Laboratory of Multimedia and Intelligent Software Technology,
College of Computer Science and Technology, Beijing University of Technology, Beijing 100124, China)
Abstract: Geometry image offers a simple and compact way of encoding the geometry of a surface and its implicit connectivity in an image-like data structure. It is useful in multiple applications because of its suitability for geometric compression, transmission, rendering, etc. Unfortunately, in the parameterizing step of generating geometry images, part of the three-dimensional model is stretched greatly. Then the regular resampling fails to capture the features on the surface and lead to reconstruction error. To solve this problem, a new geometry image method based on self-adaptive subdivision was proposed. By subdividing the mesh locally, an irregular resampling result could be obtained, which produced higher quality reconstructions. Experiments show that the method provides better results on both PSNR values and reconstructive quality.
Key words: geometry image; remeshing; parametrization; subdivision
 
 
 
 
 
 
һֻģ͵ķֲʽԤ㷨о
1,2, 1, 1
(1.йѧԺԶо, 110016; 2.йѧԺоԺ, 100049)
ժҪԷֲʽϵͳи߾ȵ״̬Ⱦ״̬׻ȡص㣬һֻ״̬ģ͵ķֲʽԤƷ÷ıǸϵͳͨԤϵͳ״̬켣ֲʽſ⡣볣ھ״̬ķֲʽԤƷȣ÷صͨ״̬ģ͵Ľ㷨ʵʱԣͨٲԴ߿ƾȡ÷һԷֲϵͳһܹ֤ϵͳĽԡMatlab滷н÷Ӧڶ˱ӿУ֤ĸ÷Ŀԡ
ؼʣֲʽϵͳԤƣ״̬ģͣϵͳ
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0280-06
Distributed Receding Horizon Control Algorithm on Relative States
WANG Zheng1,2, HE Yu-qing1, HAN Jian-da1
(1. Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China;
2. Graduate School of Chinese Academy of Sciences, Beijing 100049, China)
Abstract: In most applications of multiple distributed control problems, higher precise relative states are easier to be obtained compared to absolute states. Based on this, a new relative states based distributed receding horizon formation control method was designed. The proposed distributed control algorithm was implemented by online solving a nonlinear optimal control problem through predicting the relative states trajectory. Compared to the traditional distributed receding horizon control algorithm, the most attracting advantages of the proposed algorithm are 1) the reduced computational burden and 2) the control precision improvement due to introducing less measurement errors. Also, under some conditions, the convergence can be ensured for most of multiple distributed systems with nonlinear models. At last, the algorithm is used in multiple robot formation control system in Matlab simulation environment to verify the method.
Key words: distributed system; receding horizon control; relative state model; multiple robotic systems
 
 
 
 
 
 
칹QoSŻƵ׽
1,2,3, Ҧǿ2, Ժ2, ٶ1,4, Ž1,2
(1.žѧͨŹѧԺ, Ͼ 210007; 2.ܲεʮо, Ͼ 210007;
3.йž73682, 221006; 4.йž96610, 102208)
ժҪ֪ߵ(Cognitive Radio Network, CRN)֪ߵ(Cognitive Radio, CR)ûŵŻƵ׽⣬ӼCRûQoSֲû(Primary RadioPR)ŵĽǶȣµĶָCRNЧCRNЧΪĿ꽨ŵŻƵ׽ģ͡СʲĽԣӦŵ͹ʷ㷨(Minimum Rate Gap-based Channel and Power AllocationMRG-CPA)MACЭʵֲַʽ롣еĽӦ㷨״Ӧ㷨ͻСĹʷ㷨ȣMRG-CPAṩϴCRNЧCRûQoS֤ʡ
ؼʣ֪ߵ磻ŵ룻ŻƵ׽룻ŵ䣻MACЭ
ͼţTN915.01      ױʶ룺A      ±ţ1004-731X (2013) 02-0286-07
Opportunistic Spectrum Access Strategy Design in Heterogeneous QoS Environment
WANG Fan1,2,3, YAO Fu-qiang2, ZHAO Hang-sheng2, FENG Shao-dong1,4, ZHANG Jian-zhao1,2
(1. Institute of Communications Engineering, PLA University of Science and Technology, Nanjing 210007, China;
2. The 63rd Research Institute of The General Staff, Nanjing 210007, China;
3. Troop No. 73682 of PLA, Xuzhou 221006, China; 4. Troop No. 96610 of PLA, Beijing 102208, China)
Abstract: Considering the scenario of cognitive radio Networks (CRN) single channel opportunistic spectrum access, a single channel opportunistic spectrum access model was established which provided CR QoS guarantee and also promised interference-free to primary radios (PR). The model aimed at maximizing the useful cognitive radio network (CRN) throughput which was a new metric defined. The minimum rate gap-based access strategy was proposed and the corresponding minimum rate gap based channel and power allocation (MRG-CPA) algorithm and MAC protocol was demonstrated. Simulation results show that MRG-CPA provides more useful CRN network throughput as well as improves the CR QoS guarantee rate than existing solutions such as the first Fit Deceasing algorithm, best fit deceasing algorithm and least rate requirement based channel and power allocation algorithm.
Key words: cognitive radio; single channel access; opportunistic spectrum access; channel allocation; MAC protocol
 
 
 
 
 
ɫ۲ϵͳ״̬³
1,2, 1,2, ȫ1,2, ѫ3
(1.кҵ豸о, 471009; 2.Ƽصʵ, 471009;
3.Ϻͨѧ, Ϻ 200240)
ժҪԷƽȹ۲ϵͳ˰롢ɫͼͬʱڵͨתϵͳʾɰʽ״θͳһĹ۲̡ⷽתĹ۲ⷽɫARMAʶϣֱڴͳĿ˲㷨ά˲״̬ȽƹΪARMAıʶ⡣ͨ³֧عʶARMAѡʵʧɲӶʵARMA³ʶ
ؼʣɫ³֧ARMAģͣ³ʶ
ͼţTN911.7      ױʶ룺A      ±ţ1004-731X (2013) 02-0293-03
Robust State Estimation for Systems with Colored Measurement Noise
LIU Yi1,2, ZHAO Zhen-yu1,2, DING Quan-xin1,2, LI Jian-xun3
(1. Luoyang Institute of Electro-optical Equipment, AVIC, Luoyang 471009, China; 2. Science and Technology
on Electron-optic Control Laboratory, Luoyang 471009, China; 3. Shanghai Jiaotong University, Shanghai 200240, China)
Abstract: In practical application, the observation systems was influenced by white noise, colored noise and outliers. With transformation, a uniform measurement equation was derived by denoting the colored noise with white noise. Kalman filtering model for colored noise was proposed in order to avoid complicated computation and expansion of the dimension of the filter. The parameters of ARMA model were estimated by robust support vector regression (SVR), hence, the estimation error of ARMA model that resulted from noise and outliers was greatly decreased. Based on Kalman filtering model for colored noise and robust ARMA identification, robust state estimation for systems with unstable and colored measurement noise could be handled.
Key words: colored noise; robust-SVR; ARMA model; robust identification
 
 
 
 
 
 
ȫջڿŷо
ΰ, ΰ, ,
(繤о, 712099)
ժҪԴͳȫջڿŷϵͳ˶ʵֿ١ȷ⣬ϲԭȫջڿŷƼ˶ΪŷͨٶŶýߵĿռΪɿռʻԿƵʣŶӰ졣ͨ۷ͷ֤ȫջڿŷƼܹЧŶӰ죬ʹŷϵͳܹڽ϶̵ʱڴﵽϵͳҪ̬ȡ
ؼʣŷϵͳ˶ϣƣߵ
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0296-05
Study on Cascade Control for All Closed-loop Gun Control Servo
LI Wei, HAN Chong-wei, ZHOU Wen, ZHAO Yu-he
(Northwest Institute of Mechanical & Electrical Engineering, Xianyang 712099, China)
Abstract: It was difficult to adjust cannon rapidly and accurately in traditional all closed-loop gun control servo system because of the motional coupling. For this problem, the causes of the motional coupling were analyzed and the all closed-loop gun control servo cascade control technology was put forward. To control the adjust cannon angular rate and inhibit rate disturbance, motional coupling was regarded as the speed disturbance of the two servo control channels and the strapdown inertial navigation measured spatial angular rate was used as feedback to constitute spatial angular rate closed-loop. Through the theoretical analysis and simulation verification, the results show that all the closed-loop servo cascade control technology can effectively restrain the disturbance, and the servo system can achieve the cannon adjusting precision that the system required in a short time.
Key words: servo system; motional coupling; cascade control; strapdown inertial navigation
 
 
 
 
 
 
ӦԤ˲תʹƷ
̷ΰ, ,
(ӹо, 100854)
ժҪԿռĿعУתʹģǿǸ˹⣬Ԥ˲չ˲ϵתʹƷ÷ʵʱƲϵͳģͣ˲ͬʱӦߵģ͵޼˲ȣ÷Сٶȿ졢ģ³ǿЧתʵĹƾȣƵȽѰ
ؼʣתʣģͣģԤ˲չ˲Ӧ
ͼţTJ765.331      ױʶ룺A      ±ţ1004-731X (2013) 02-0301-06
Los Rate Estimation Based on Adaptive Predictive Filter
TAN Li-wei, YIN Xing-liang, GUO Da-yong
(Beijing Inst. of Electronic System Engineering, Beijing 100854, China)
Abstract: Aiming at the nonlinear mathematic of the model of the line of sight (LOS) rate and the unknown disturbance during the flying of the interceptor, model predictive filter (Model Predictive Filter, MPF) and extended Kalman filter (EKF) were proposed to cooperate to estimate the LOS rate. In this method, model error would be estimated as part of the solution. In addition, an adaptive method was involved to solve the problem of the noise variance change. The simulation results show that compared to UKF this method needs less computation time and has better convergence and better LOS rate precision which has brought better guidance precision as a result.
Key words: LOS rate; nonlinear mathematics model; MPF; EKF; adaptive filter
 
 
 
 
 
 
㶯ŻƵ
, , ѩ÷
(Ӽо, 100038)
ժҪԸ߳ٻʽ켣ŻƵؼһ͵ŻƵɡȣͨ˶ѧѧ״̬仯صļٶʱ߶ȵĻ֣ȻӦſ۷ֱͬʱ߶ϵ⣬õ⣻ڴ˻ϣ㶯ƳбջʽŻƵɣ󣬶ƵɵЧԽѧ֤ƵάռڵĿ귽Զ뻬У㷨óıջƵʵʱ󣬾йӦǰ
ؼʣ; 㶯; Ƶ; ߳ٻ; ά
ͼţV448      ױʶ룺A      ±ţ1004-731X (2013) 02-0307-06
Optimal Glide Guidance Based on Singular Perturbation
HU Xi-jing, YAN Wei-gang, HUANG Xue-mei
(Beijing Institute of Control and Electric Technology, Beijing 100038, China)
Abstract: A novel optimal glide guidance law was proposed for the purpose of developing the reentry trajectory optimization and guidance technology of a hypersonic glide-reentry vehicle. First, three time- scales separations were established based on the assumptions of the behaviors of state variables for a reentry vehicle. Then, through solving the three sub-problems by optimal control theory, analytical solutions were derived. Furthermore, the closed-loop optimal glide guidance law (COGGL) was created based on the singular perturbation method. Finally, the validity of the proposed guidance law was verified through numerical simulations. The results demonstrate that the COGGL assures maximum- range glide of the reentry vehicle for a three dimensional intercept. Also, the COGGL is potential to apply in engineering, because its closed-loop analytical solutions meet the need of onboard real-time calculations.
Key words: reentry vehicle; singular perturbation; optimal guidance law; hypersonic glide; three dimensional
 
 
 
 
 
ʵʱϵͳʵʱܲԼо
Ѷ, ,
(ϺɻоԺ, Ϻ 200235)
ժҪʵʱDZʵʱϵͳҪָꡣִʵʱϵͳĶȡڴжϴȻƶϵͳʵʱܴ˺ܴӰ졣Ϊ˶ʵʱϵͳܽ꾡IJԣҪʵʱϵͳʵֻƽķȷϵͳʵʱʱӾȣѡдԵʵʱָ꣬ƶʵʱָܲԷжӦӳDZϵͳʵʱָ꣬ӰϵͳʵʱܡӳӦֱأʵʱϵͳӦõֱָꡣжӦӳٺӳٵIJƲʵʱϵͳܲԡ
ؼʣʵʱϵͳжӦӳ٣ȶܲ
ͼţTP316.2      ױʶ룺A      ±ţ1004-731X (2013) 02-0313-04
Research on Real-time Operating System Performance Measurement
WU Xun, MA Yuan, DONG Qin-peng
(Shanghai Aircraft Design and Research Institute, Shanghai 200235, China)
Abstract: Real-time performance is the most important parameter for real-time operation system (RTOS). Modern RTOS implementation mechanisms, such as multi-task scheduling, memory management, interrupt services, are the key factors that impact the real-time performance of RTOS. For the elaborate testing of RTOS real-time performance, analysis for the implementation mechanism of RTOS, real-time resolution determination, real-time criteria parameters selection and testing system setting up are necessary. Interrupt service latency is the basic parameter of RTOS, which effects other real-time performance of RTOS. Periodical task scheduling jitter has close relation to real-time application. According to the mechanism analysis of interrupt service latency and periodical task scheduling jitter, real-time performance testing of RTOS is implemented.
Key words: RTOS; interrupt service latency; periodical task scheduling jitter; performance measurement
 
 
 
 
 
Ǿȷ»֤۵ĵϵͳɿģ
, , ,
(йоԺӹо, 621900)
ժҪϵͳĸԪʧЧΪȷʱͳĸʷʹãȷǸʷõĽȽϴֲڡ֤ۣ˷Ǿȷ´k-out-of-nȵϵͳĿɿģͣκȻ֤ԪɿеIJȷԴݵϵͳӶóϵͳʧЧʺͿɿȵĸʷֲ½硣ʵķܽϺõĴɿԼеIJȷϢұõЧϢࡣ
ؼʣɿ; ȷ; Ǿȷ; ֤
ͼţTB114.3      ױʶ룺A      ±ţ1004-731X (2013) 02-0317-05
Reliability Model of Typical Systems for Imprecise Probability Using Evidence Theory
SUO Bin, CHENG Yong-sheng, ZENG Chao, LI Jun
(Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621900, China)
Abstract: In the situation that unit failure probability is imprecise when calculation the reliability of system, classical probability method is not applicable, and the analysis result of non-probability method is too coarse. To calculate the reliability of series-parallel systems in the above situation, D-S evidence theory was used to represent the unit failure probability. Belief and plausibility function were used to calculate the reliability of series and parallel systems by evidential reasoning. By this mean, lower and upper bounds of probability distribution of system failure probability were obtained. Simulation results show that the proposed method is preferable to deal with the imprecise probability in reliability calculation, and can get additional information when compare with interval analysis method.
Key words: reliability; uncertainty; imprecise probability; evidence theory
 
 
 
 
 
 
ڼȨBBVֻϢо
,
(人ѧԶѧԺ, 人 430070)
ժҪоֻϢĴɺʹص㣬ԱõֻµϢý塣BBVȨĻϽʵתϢصҶ˹-ѷֻϢתʵĶ壬нڵڵ4״̬ڴ˻ϽֻϢģֻͣϢĴ̽ģ⣬ӰϢأ˶ϢתЧʵĸģʼϢԴĵǿȴСӰϢĴȣϢתЧͬʲȣϢĴûеݽ׶̬Ϊ
ؼʣ磻ֻϢģ⣻ϢȨ
ͼţN949      ױʶ룺A      ±ţ1004-731X (2013) 02-0322-05
Dissemination Model of Mobile Phone Short Messages Based on BBV Weighted Networks
SU Yi-xin, LIAN Cheng
(School of Automation, Wuhan University of Technology, Wuhan 430070, China)
Abstract: The objective of the research is to make better use of mobile phones, a new medium of information dissemination, by studying its rules and characteristics. On the ground of BBV weighted networks, the study defined information transmission probability and 4 states of nodes in it in light of its characteristics in daily use and Yerkes-Dodson Law. And a new model of cell phone information dissemination was established. By simulating the dissemination process, the research analyzed the factors influencing the dissemination and put forward the concept of short message transmission efficiency to illuminate its efficiency. The results show that, the intensity of the initial source message has no effect on the range of dissemination; transmission efficiency is disproportional to transmission rate; and short message dissemination has no hierarchical dynamic behavior.
Key words: complex networks; cell phone information; computer simulation; information dissemination; weighted networks
 
 
 
 
 
Ӧ淨ĿսҲŻо
ͽ, , ¹
(װױѧԺеϵ, 100072)
ժҪӦӦ淨ԿսһϵͳIJŻķͨ-ҷԪģͣѡ񻺳ҵԼ׿ѹΪŻٶȷֵСΪŻĿ꣬ƺƷС˷ж׶ʽ̵IJƣӦģ͡ȻŴ㷨Ż⡣ŻǰһԵĶԱȽŻٶȷֵС23.8%ҵĻߡ
ؼʣңŻԪģͣӦ淨
ͼţTJ811.91      ױʶ룺A      ±ţ1004-731X (2013) 02-0327-06
Research on Parameter Optimization of Airbags for Airborne Vehicle
Base on Response Surface Methodology
HONG Huang-jie, WANG Hong-yan, HAO Gui-xiang
(Department of Mechanical Engineering, Academy of Armored Force Engineering, Beijing 100072, China)
Abstract: A method was described, which optimized parameters of airbags for airborne vehicle using response surface methodology. A nonlinear finite element model of hull and airbags was established. On this base, area and unsealing pressure of vent of airbags were chosen as optimization variable, while minimizing the maximal impact acceleration of hull was optimization objective. Factorial Design, Central Composite Design and least squares techniques were used to estimate the parameter of the second-order polynomial equation. Then second-order response surface model was established. After optimization process using genetic algorithm, the optimum solution was attained. The comparison result between cushion characteristics fore and after optimization shows that after optimization the maximal impact acceleration of hull is decreased by 23.8%. The cushion performance of airbags is observably improved.
Key words: airbag; parameter optimization; finite element model; response surface methodology
 
 
 
 
 
 
ƵʺͶƱͼȥ뼰о
濾1,2, Ǯ1, ϼ2
(1.йҵѧϢѧԺ, 100083; 2.³ѧϢѧԺ, ̨ 264025)
ժҪ˵ӾԭͼֲݶȶһͼƵʣͼƵʴȫģеݶȡͬʱͶƱԭȫģͣһͼṹԺģеճ ͼͬĽṹȥڱģͱãһֻƵʵͶƱȫСϵͼȥ·ʵݱģͱеȫģ;ԵĿܹ׼ȷϸؿ̻ͼԵṹƽ򣬿˷ȫģĽЧӦ͹ƽرǶḻ͵ȵͼȥͬʱܽϺõرֱԵҪ
ؼʣƫ΢ַ̣ȫ֣ͶƱͼƵʣͼȥ
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0333-07
Simulation Research of Image Denoising Based on Frequency and Tensor Voting
LIU Chan-juan1,2, QIAN Xu1, LI Cai-xia2
(1. School of Mechanical Electronic and Information Engineering, China University of Mining and Technology, Beijing 100083, China;
2. School of Information and Electrical Engineering, Lu Dong University, Yantai 264025, China)
Abstract: Combining with human vision principle, firstly, an image frequency based on image local gradient was defined in the purpose of replacing the gradient in the traditional total variation (TV) model, and then tensor voting principle was introduced into the TV model and an image structure saliency function was given to replace the Lagrange multiplier , which could adjust the regularizing term and fidelity term according to the different areas of image structure features, therefore, a novel texture image denoising model integrating tensor voting and total variation minimization was constructed. Its simulation experiment results show that, compared with other existing TV approaches, the new model has an obvious anti- jamming capability and can accurately and subtly describe the sharp edges, feature structures and smooth areas, and can overcome staircase effect and over-smoothing generated by other TV models. Especially for those images with rich texture features and low signal to noise ratio (SNR), it can remove the noise while preserving significant image details and important characteristics and improve the image denoising effect.
Key words: partial differential equation (PDE); total variation; tensor voting; image frequency; texture image denoising
 
 
 
 
 
 
RTWTĹ¯Ӳڻ·ϵͳ
޺, ־, ־,
(̫ԭƼѧϢѧԺ, ̫ԭ 030024)
ժҪRTWTݲɼ򣬽ʵֶͨģĹؼ⣬ͨõʵ֡FIFOͨA/Dתʵֵȡڴ˻ϣԹ¯ϵͳӦMatlab/RTWT䣬Ӳڻ·ʵʱƽ̨ƽ̨ܹظ㷨ܽ˻ʵԽƵӲڻ·ƽ̨ܹɿС
ؼʣӲڻ·; ݲɼ; ; Matlab/RTWT; ¯ϵͳ
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0340-06
Development of Hardware-in-Loop Simulation System for Boiler Based on RTWT
BAI Yan-hong, ZHAO Zhi-juan, SUN Zhi-yi, LI Hong
(School of Electronics and Information Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China)
Abstract: Drivers for the adopted data acquisition card were designed in RTWT (Real-time Windows Target). And the schemes to solve the key technical issues of multi-channel analog input were proposed, including changing channel number or gain, treating useless FIFO data, accomplishing multi- channel A/D conversion and so on. On this basis, the Hardware-in Loop real-time simulation platform for the boiler control system was developed using Matlab/RTWT tool. With the proposed platform, not only can the control algorithms be replaced easily, but also human-computer interaction can be conducted. Lots of testing experiments were carried out, and the results indicate that the designed card drivers and the established Hardware-in Loop simulation platform can work reliably.
Key words: Hardware-in-Loop simulation; data acquisition card; driver program; Matlab/RTWT; boiler control system
 
 
 
 
 
 
FFTʲо
1,2,4㷼3ܲ14
(1.йѧоԺȾƼо, 100012; 2.ʦѧԺӿѧѧԺ, 236041; 3.ְҵѧԺϢϵ, 272037; 4.йҵѧϢѧԺ, 100083)
ժҪͳʲǻ˲ʱԽеģ׽򹩵ĵʱ仯Ӱ˼׼ȷԡΪˣһֻźŴʲõƵɼʱ仯̵Ķźţдõʣ֤ʵԡʵڲϵͳ˷棬ֱ۵ع۲˲缫ԵܶȵŶо˼ƵʡֵʱԲӰ죬Ƚ˴ͳ·ķķܹΪ׼ȷزĵʣ˲ȶԡ
ؼʣʣٸҶ任
ͼţP631; TP391    ױʶ룺A      ±ţ1004-731X (2013) 02-0346-05
Research and Simulation of Soil Resistivity Measurement Method Based on FFT
ZHU Yong1,2,4, WANG Xiu-fang3, NAI Chang-xin1, WANG Zhen-chong4
(1. Research Institute of Solid Waste Management, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
2. School of Physics and Electronics, Fuyang Teachers College, Fuyang 236041, China;
3. Department of Electronic and Information Engineering, Jining Vocational Technology College, Jining 272037, China
4. School of Mechanical Electronic and Information Engineering, China University of Mining and Technology, Beijing 100083, China)
Abstract: The traditional method of soil resistivity measurement is based on the transient characteristics of soil electrical conductivity, the soil resistivity change caused by incentive of the current cant be caught, and the accuracy of the test results hase been affected. Based on signal processing, a new measurement method for soil resistivity was put forward. To ensure the authenticity of the measurement results, in the case of low frequency AC excitation, the multi-cycle signal containing the changes of resistivity was collected, the resistivity was acquired after the signal was processed. By the simulation of soil resistivity laboratory measurement system, the disturbance of current density caused by measuring electrodes was observed visually, the measurement results under different frequency, amplitude and power supply time of excitation current were researched, furthermore, was compared with traditional methods. Simulation results show that soil resistivity measurement results are accurate and stable by proposed method.
Key words: soil; resistivity; FFT; measurement; simulation
 
 
 
 
 
AUTOSAR淶ϵͳĽ׼ģо
, ʷ, , л
(ϴѧϢѧ빤ѧԺ, ɳ 410082)
ժҪϵͳܹڸӵĿά׼ģڽϸ߳ζϵͳнģ˽ģٶȡԻAUTOSAṚSystemCԼṩʱΪӲˣн׼ģλƺͨϸصAUTOSARԺSystemC֮Ƶ㣬AUTOSARSystemCԭƵתֽ̡ģЧʵַAUTOSAR淶ϵͳķ棬ٶȿ죬ϵͳڽ׶֤ܷ
ؼʣAUTOSAR׼ģϵͳǶʽ
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0351-05
Research on Transaction-level Modeling
for Automotive Electronics Systems Conforming AUTOSAR Specification
CHENG Mi, LI Ren-fa, LI Rui, XIE Yong
(College of Information Science and Engineering, Hunan University, Changsha 410082, China)
Abstract: AUTOSAR contributes to the development, management and maintenance of complicated automotive electronics software. Transaction-level Modeling builds the model of a system at a higher level of abstraction and improves the modeling speed. For AUTOSAR-based software flow, SystemC Language and the time behavior and hardware simulation kernel were used, which offered to design in hierarchy and communication refinement by Transaction-Level Modeling method. The similarities between AUTOSAR descriptive language and SystemC language were discussed, and the conversion process from AUTOSAR environment to SystemC virtual prototype was designed. The results show that the modeling scheme can realize the simulation on automotive electronic systems conforming AUTOSAR specification, and the simulation speed is fast and it is conducive to the verification and performance analysis of the early stages of design.
Key words: AUTOSAR; transaction-level modeling; automotive electronics systems; embedded software
 
 
 
 
 
ԺײĩƵ״ﲨиЧӦо
1, 2
(1. չѧԺϢϵ, ̨ 2640012. 91919, Ƹ 438000)
ժҪײƵ״кܸߵĸپȺͷֱʣڶĸŹУЧи̶ȵӰϴ󡣶Էɻƺ͵ֱģڿǸٲԷɻơиĻϣӼѧ˶ѧĽǶо˲иЧӦľ̲Է棬õ˽Ϊ׼ȷ˶켣ȽϷиЧӦʱ˶𣬵óӦĽۣԺײƵĸʱиЧӦܴӰ˶ľ켣ij̶ֳϾĸųɹ
ؼʣײиЧӦѧ˶ѧģ
ͼţTN972      ױʶ룺A      ±ţ1004-731X (2013) 02-0356-05
Research on Incision Impact Against Millimeter Wave Terminal Guidance Radar
QU Chang-wen1, LI Ya-nan2
(1. Department of Electronic and Information Engineering, Naval Aeronautical and Astronautical University, Yantai 264001, China; 2. Unit 91919 of PLA, Huanggang 438000, China)
Abstract: Millimeter guided radar has a good tracking accuracy and resolution. In the process of chaff' centroid jamming against missile, and the effect of jamming was highly affected by the degree of the incision. The models of plane, chaff cloud and missile were built, and on the consideration of tracking beam's initiative incision to plane or chaff cloud, the detailed process of chaff's incision impact was specifically researched and simulated from the angle of geometry and kinematics, through which the more correct moving track of centroid could be gotten. Comparing and analyzing the differences whether the incision effect was considered, the conclusion could be summarized as follows: When chaff centroid jamming is against millimeter guided missile, the incision effect affects the centroid's moving track a lot, and to some extend, it decides whether the centroid jamming succeeds.
Key words: millimeter wave; incision impact; geometry; kinematics; modeling and simulation
 
 
 
 
 
װԤֹʩķ
121,2
(1.ѧľ̷ּֽо, 730050;
2.ѧо, 730050)
ժҪṹѷIJҪˮˮ¶Ӧ¶ȱġֲ㽽ʩнϺõĽЧڷֲ㽽֮ǰԤһ״õĴֱֹиõĽЧANSYSԪֱģijװʩԤֱֹ벻Ԥֱֹܵķֲ㽽ֹ̣µ¶ȳ¶ӦбȽϣóԤ÷βôֱֹܵľ彵ЧΪشʩ¶ѷṩο
ؼʣ¶ӦԤֱֹܣֲ㽽ʩANSYS
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0361-06
Simulation of Placing Vertical Steel Tubes in Massive Concrete Foundation
During Layered Construction Period
LI Hui1, CAI Wen-ming2, DU Yong-feng1,2
(1. Western Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou Univ. of Tech, Lanzhou 730050, China;
2. Institute of Earthquake Protection and Disaster Mitigation, Lanzhou Univ. of Tech, Lanzhou 730050, China)
Abstract: The cracks in massive concrete structures are mainly caused by the thermal stress and thermal strain due to hydration heat of cement. Layered construction can reduce the temperature obviously, but it can more obviously reduce temperature if placing some vertical steel tubes with some form in massive concrete structures before construction. The thermal field and thermal stress field were studied when massive concrete structures were placed on vertical steel tubes which form was like a plum blossom during layered construction period by ANSYS finite element calculation software. And compared with the data of not placing vertical steel tubes, the steel tubes specific effect of reducing temperature was obtained, and some suggestions were listed for the reference in practical projects.
Key words: massive concrete; placing vertical steel tubes; temperature stress; layered construction; ANSYS simulation
 
 
 
 
 
 
ϸʽ׵ֳ
Ⱥ, ,
(ϾѧеѧԺ, Ͼ 210094)
ժҪһٺϽ̼ɵµϸʽ׵ṹԪֳ޸ְезֳаֽܹṹ󡣷ϸʽṹ׵ֳڵʽٺϽ𴩼׵ϸʽ׵еٺϽֵ̼оֱȱ仯ֳӰ죬óڲͬŰٶȶζӦŲֱͬȣ˽ܹӦõʵС
ؼʣϸˣṹٺϽ̼٣ֱ
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0367-04
Simulation Analysis on Penetration Ability of Composite Rod Penetrator
WU Qun-biao, SHEN Pei-hui, LIU Rong-zhong
(School of Mechanical Engineering, NJUST, Nanjing 210094, China)
Abstract: A new composite rod penetrator composed of tungsten alloy and tungsten carbide was designed. Simulation analysis of the composite rod penetrator penetrating semi-infinite armor steel target was made by using the finite element simulation software. The phenomenon of structure self-sharpening was found during the penetration process. Simulation results verify the penetration ability of composite rod penetrator is better than that of homogenous rod penetrator. Subsequently, a conclusion was given by analyzing the diameter ratio change of tungsten alloy and tungsten carbide in composite rod penetrator. The conclusion is that different impact speed segments are corresponding to different optimal diameter ratios which can be applied to engineering practice.
Key words: composite rod; structure self-sharpening; tungsten alloy; tungsten carbide; diameter ratio
 
 
 
 
 
 
UUVڡ⻷߼ǿѹǿȶԷ
Ң1, αά1, 1, ־2
(1.ҵѧѧԺ, 710072; 2.йعŹ˾705о, 710075)
ժҪ޶⾶Ϊ534mm£ѧģۼAnsysֵַˮºUUV߼ǿԲѹǽǿȼȶԷõڡ߹ʽľλơӦֵʧٽѹڡ߹ʽĽ˷Ƚϡڴ˻ϣ˿ֱǿȼȶԵӰԿ۳ֱӰڡ߹ǼǿʽǿȼȶԽ˷Ƚϡһѹ£߹нǿӦ߹ʽǿȼȶԽϺãǣڳȥǰֱƵӰ֣߹Ǻ߹ʽǿȼȶС߹ʽûԵơ
ؼʣڻ; ⻷; ѹ; ǿ; ȶ; ˮº
ͼţU661.4      ױʶ룺A      ±ţ1004-731X (2013) 02-0371-06
Strength and Stability Analysis of UUVs Cylindrical Shell
Stiffened by Inside and Outside Rings
ZHU Xin-yao1, SONG Bao-wei1, WANG Peng1, SHAN Zhi-xiong2
(1. College of Marine Engineering, Northwestern Polytechnical University, Xian 710072 China;
2. The 705th Research Institute, China Shipbuilding Industry Corporation, Xian 710075, China)
Abstract: With the limitation of maximum diameter 534mm, in order to compare the qualities of shells stiffened by inside rings and outside ones, strength and stability of the shells stiffened by inside and outside rings were analyzed and radial displacement, stress and instability critical pressure were gotten using two kinds of methods, simplified mathematical models and numerical simulation adopting the software of Ansys. On the basis of this, the impact of shell diameter on strength and stability was calculated and the qualities of the shells stiffened by inside and outside rings were analyzed without the effect of diameter. The results show that the strength and stability quality of the shell stiffened by outside rings is better than the inside ones and the shell stiffened by inside rings has a stronger stress concentration. However, when the effect of maximum diameter limitation is removed, the difference of quality between the outside and inside ring-stiffened shells is very small.
Key words: inside rings; outside rings; pressurized cylindrical shell; strength; stability; Unmanned Underwater Vehicle
 
 
 
 
 
ķֲʽϵͳԷ
1, 1, 2
(1.ѧѧ뼼ѧԺ, 116023; 2.ѧѧԺ, 116023)
ժҪΪ˿˷ֲʽϵͳвΪɢͳһ⣬ƿ˷ֲʽϵͳԷܣͬʱΪʹܸõӦϵͳ֮УŻ쳣̽Ҫģضлڿʵģ(CSSVM)Analyzer-Manager-WorkerܹṩչӿԷ㳡䡣豸ܼʹóΪһ̽CSSVMĹܺص㡣XenʹøóԿܽ˲ԣнϸߵʵԺͿԡ
ؼʣֲʽϵͳۣгģ
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0377-06
Distributed System Test and Analysis Framework for Virtual Machine
WANG Yu-xin1, LIU Wei1, GUO He2
(1. School of Computer Science and Technology, Dalian University of Technology, Dalian 116024, China;
2. School of Software, Dalian University of Technology, Dalian 116024, China)
Abstract: In order to overcome the contradiction between dispersion of test behavior and the requirement for concentration of test result in distributed system analyzing, a test and analysis framework for distributed system was designed. Meanwhile, in order to make the framework work well for the virtual machine systems and meet the requirements about the simulation of the system running environments for virtual machines performance optimization and anomaly detection, an extensible component named Characteristic Scenarios Simulator for Virtual Machine (CSSVM) was developed. The simulator took an Analyzer-Manager-Worker structure and provided an extensible development framework with API. The scenario of high workload of Network device was illustrated to explain the functions and features of the framework. And finally, the tool was verified in Xen, and the experimental results show its practicality, availability and expansibility.
Key words: distributed system; performance evaluation; virtual machine; characteristic scenarios; simulator
 
 
 
 
 
ܵҺҺֵģо
1, ΰ1, 2
(1.ڹѧԺ¹͹ϵ, 401311; 2.ڹѧԺо, 401311)
ժҪΪ˻ùܵҺ̵״̬VOFģͶԹܵҺֵģоģͿҺճճȣܱڴֲڶԼѹЧӦýṹӦܼ˸٣۲һµҺϼ仯̣˳вͬʱ̵ĹܵѹֲĦõһҺģҲڽʵ񻮷ֺͲãVOFģͿڷɱѹֵģ⡣
ؼʣܵҺҺVOFģͣ˲ֵ̬ģ
ͼţTP391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0383-06
Mathematic Simulation on Gas-liquid Two-phase Flow of Pipe Pigging by Gas Condition
JIANG Jun-ze1, ZHANG Wei-ming1, LI Zheng-yang2
(1. Department of Military Petroleum Supply Engineering, Logistical Engineering University, Chongqing 401311, China;
2. Postgraduate Group Five, Logistical Engineering University, Chongqing 401311, China)
Abstract: Based on the deeply analyzing the simulation method, VOF model was employed to research gas-liquid two-phase flow of the pipe pigging process, taking surface tension, wall adhesion, the viscosity of the liquid, the walls roughness and the gas compressibility into consideration. The simulation took unobstructed mesh and mesh decipherment technology to trace the gas-liquid interface and the gas-liquid interface mixture and variation processes were obtained. Then, The pressure distribution, gas volume percentage, two-phase flow friction and the energy transformation at different moment were analyzed. The results show that VOF model could be used to the numerical simulation of non-free surface two phase flow.
Key words: pipe; pigging with gas; gas-liquid two-phase flow; VOF model; transient mathematic simulation
 
 
 
 
 
 
ϵͳʵжϺ͸ٷ
1, ΰ1, 2, ⴺ2
(1.Ϻѧϵ, Ϻ 200444; 2.Ϻѧ繤ԶѧԺ, Ϻ 200072)
ժҪӹػ֣ͨصĵѹϵԼӦۼ㣬һµʵжϺ͸ٷ÷ֱӽʵ٣ΪಽŶ۲취IJѡȡݡͨ㷨ȽϺʵ֤֤ʵ˸÷ڻͻȻ仯ڻ仯£ܹѸٵ͸ʵ㣬䲽ԵڹֲŶ۲취񵴵IJ㡣
ؼʣMatlab/Simulink; 䲽; ʵ; ϵͳ
ͼţTP.391.9      ױʶ룺A      ±ţ1004-731X (2013) 02-0389-05
Novel Method of MPP Tracking in Photovoltaic System
WANG Yi-fei1, WU Wei1, YANG Yu2, WU Chun-hua2
(1. Department of Physics, Shanghai University, Shanghai 200444, China;
2. School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200072, China)
Abstract: An improved method to track MPP (maximum power point) in photovoltaic systems was proposed. This method based on the analysis of photovoltaic model and its output characteristics could adjust the step size automatically and determinate the tracking directions. The matlab simulation and experiment results show that this method has improved the speed and accuracy compared with P&O method in different cell operation conditions.
Key words: matlab/simulink simulation; variable step; maximum power point tracking; photovoltaic system
 
 
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