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Analysis of physical performance of two-row hexagonal fuel assembly for SCWR

Hedongli Gongcheng/Nuclear Power Engineering 2010年第SUPPL. 2期31卷 83-87页

作者： Wang, Lian-Jie Qin, Dong Li, Qing Yao, Dong Science and Technology on Reactor System Design Technology Laboratory Chengdu 610041 China

A new hexagonal fuel assembly(FA) design which has two rows of fuel rods between the hexagonal moderator channels is proposed for the thermal supercritical water cooled reactor(SCWR). The two-row hexagonal fuel assembly concept is first and foremost considered for the performance of uniform moderation and sufficient moderation, and with the respect of structural performance and thermal-hydraulic performance. The physical performance of the two-row hexagonal FA with acceptable configuration is investigated. The results show clearly that a better balance between uniform moderation and sufficient moderation can be obtained in the two-row hexagonal fuel assembly. The design objective of the local power peaking factor less than 1.10 can be achieved under the condition of using the same enrichment fuel and containing no burnable poison.

关键词： Nuclear power plants

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Coding gabor features for multi-modal biometrics

Coding gabor features for multi-modal biometrics

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Chinese Conference on Pattern Recognition

作者： Shen, Linlin Ji, Zhen Li, Yuwen Bai, Li Shenzhen Key Laboratory of Embedded System Design School of Computer Science and Software Engineering Shenzhen University China Shenzhen Institute of Information Technology Shenzhen China School of Computer Science University of Nottingham United Kingdom

ISBN: (纸本)9781424472109

Although biometrics technology has progressed substantially, its performance is still to be improved for real applications. This paper aims to improve the accuracy of personal identification, when only single sample is registered as template, by integrating multiple hand-based biometrics. To make fusion much easier, the same feature, so called fusion code, and decision level fusion strategy are used. Two fusion cases, face & palmprint and FKP & palmprint were taken as examples to verify the effectiveness. Experimental results show that much better performance than single modal biometrics has been achieved. ©2010 IEEE.

关键词： Biometrics

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Optimum control for active steering of vehicle based on H∞ model following technology

Optimum control for active steering of vehicle based on H∞ ...

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International Asia Conference on Informatics in Control, Automation and Robotics, CAR

作者： Feng Du Ji-shun Li Lun Li Yu-jun Xue Yong-gang Liu Xian-zhao Jia Key Laboratory of Machinery Design and Transmission System Henan University of Science and Technology Luoyang China

ISBN: (纸本)9781424451920

This paper introduces a new control scheme for active steering of vehicle. An ideal reference model followed by the four-wheel steering (4WS) vehicle is established resulting from the front-wheel steering (FWS) vehicle, and an H ∞ optimum controller for the 4WS vehicle is designed based on model following technology. The dynamic simulation is performed to verify control effect of the H ∞ controller, and the result shows that the H ∞ controller can apply to the 4WS vehicle system. It can not only minimize the sideslip angle of the 4WS vehicle to zero value, but also keep the yaw rate of the 4WS vehicle in accordance with the FWS vehicle. The handleability is further improved for 4WS vehicle.

关键词： Vehicle dynamics Motion control Wheels Vehicle driving Equations Turning Axles Automatic control Robot control Robotics and automation

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Building Virtual Reality design system Based on DIVISION Mockup Software

Building Virtual Reality Design System Based on DIVISION Moc...

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International Conference on Electrical and Control Engineering (ICECE)

作者： Lun Li Ji-shun Li Feng Du Dong-hong Si Key Laboratory for Machinery Design and Transmission System Henan University of Science and Technology Luoyang Henan China

This paper dissertates the function of Virtual Reality technology in the product development process, and discusses the advantage in building virtual reality design system with the PTC DIVISION Mockup software. The four key technology projects of building Virtual Reality design system are explained simultaneously. In the virtual reality environment that is built with DIVISION Mockup Software, the virtual prototype of the Tunnel Boring Machinery is established and movement simulation is completed.

关键词： Solid modeling Virtual reality Software design automation Real time systems Machinery Biological system modeling

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Research on control and operation support integrated system for nuclear power plants

Research on control and operation support integrated system ...

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International Conference on Computer, Mechatronics, Control and Electronic Engineering (CMCE)

作者： Chen Zhi Chen Deng-ke Zhang Yao Yu Ren National key laboratory of design technology of nuclear reactor system Nuclear Power Institute of China (NPIC) Chengdu China Department of nuclear power science and engineering Naval university of engineering Wuhan China

ISBN: (纸本)9781424479573

At present, the information and control system (I&C) and operation support system (OSS) of the nuclear power plants (NPPs) are designed separately; their structures and functions are independent. So, the compatibility, availability and dependability of them are not desirable, and the comprehensive advantages of them are not to exert fully. In order to resolve these problems, this paper presents a new idea that designing and developing the I&C and the OSS coordinately, so that their structures and functions are integrated. Firstly, this paper reviewed the evolution and application status of the OSS. And then, the realization methods and forms for the integrated system are analyzed. At last, the hierarchy and architecture of the integrated system which have the double-functions of the I&C and OSS is founded. Analysis and study is also carried out in terms of the hierarchy and characteristics of the integrated system.

关键词： Europe Instruments Reliability engineering Maintenance engineering

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A Hybrid Vector Artificial Physics Optimization with One-Dimensional Search Method

A Hybrid Vector Artificial Physics Optimization with One-Dim...

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International Conference on Computational Aspects of Social Networks(国际社会网络计算会议 CASoN 2010)

作者： Gangjun Yang Liping Xie Jianchao Zeng Ying Tan Key Laboratory of Contemporary Design and Integrated Manufacturing Technology Ministry of Education Complex System and Computational Intelligence Laboratory Taiyuan University of Science and Technolog

The direction of each individual velocity vector is very useful information for search in Artificial Physics Optimization (APO) algorithm. APO's simple way to dealing with the errant individual exceeded the lower or upper bounds constrains changes the direction of its motion vector. A shrinkage coefficient is introduced to ensure that each individual is within the decision space without changing its direction. One-dimensional search method is merged into the vector model of APO (VM-APO) to improve its local search capability. The simulation results confirm that the performance of the hybrid vector APO with one-dimensional search method is effective.

关键词： Physicomimetics Artificial physics optimization Global optimization Virtual force Newton's Second law

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An innovative algorithm for reactor core loading pattern optimization

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Hedongli Gongcheng/Nuclear Power Engineering 2010年第SUPPL. 2期31卷 88-91页

作者： Gong, Zhao-Hu Yao, Dong Wang, Kan Department of Engineering Physics Tsinghua University Beijing 100084 China Science and Technology on Reactor System Design Technology Laboratory Chengdu 610041 China

To solve the reactor loading pattern optimization problem in realistic nuclear power plants, this paper presents a new optimization method - Interval Bound Algorithm, and introduces the origin of the algorithm and describes its implementation procedure. Based on this algorithm, the corresponding parallel loading pattern optimization code of IBALPO is developed using Fortran95. Finally, this code system is used to solve a realistic and difficult reload problem to show its performance, and a better pattern is obtained compared to the one searched by experienced engineers.

关键词： Nuclear power plants

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Development of neutronic and thermal-hydraulic couple code of AHRs and preliminary investigation on bubble distribution

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Hedongli Gongcheng/Nuclear Power Engineering 2010年第SUPPL. 2期31卷 79-82页

作者： Wang, Liang-Zi Yao, Dong Wang, Kan Department of Engineering Physics Tsinghua University Beijing 100084 China Science and Technology on Reactor System Design Technology Laboratory Chengdu 610041 China

The absence of radiolytic-gas bubbles strongly affects the steady operation of Aqueous Homogeneous reactors (AHRs), and because of the buoyancy and collision effects, the bubble behavior and their steady distribution in the reactor is always hard to predict. Now, computation methods of AHRs always use a function to express the bubble distribution approximately. Related investigation shows that in CFX, using Multiple Size Group (MUSIG) model, the multi-phase simulation results predict the bubble behavior well, and tally with the experimental results of an AHR. This paper firstly introduces the neutronic and thermal-hydraulic couple code FMCAHR_CFX, and in the last chapter, FMCAHR_CFX is used for a preliminary analysis of a simple AHR.

关键词： Radiation chemistry

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New development thoughts on the bio-inspired intelligence based control for unmanned combat aerial vehicle

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science China(Technological sciences) 2010年第8期53卷 2025-2031页

作者： DUAN HaiBin 1 ,SHAO Shan 2 ,SU BingWei 3 &ZHANG Lei 41 State Key laboratory of science and technology on Holistic Flight Control,School of Automation science and Electrical Engineering, Beijing University of Aeronautics and Astronautics,Beijing 100191,China 2 Flight Control Department,Shenyang Aircraft design and Research Institute,Shenyang 110035,China 3 Beijing Institute of Near Space Vehicle’s system Engineering,Beijing 100076,China 4Integration and Project Section,Air Force Equipment Academy,Beijing 100085,China 1. State Key Laboratory of Science and Technology on Holistic Flight Control School of Automation Science and Electrical Engineering Beijing University of Aeronautics and Astronautics Beijing 100191 China2. Flight Control Department Shenyang Aircraft Design and Research Institute Shenyang 110035 China3. Beijing Institute of Near Space Vehicle’s System Engineering Beijing 100076 China4. Integration and Project Section Air Force Equipment Academy Beijing 100085 China

Bio-inspired intelligence is in the spotlight in the field of international artificial intelligence,and unmanned combat aerial vehicle(UCAV),owing to its potential to perform dangerous,repetitive tasks in remote and hazardous,is very promising for the technological leadership of the nation and essential for improving the security of *** the basis of introduction of bioinspired intelligence and UCAV,a series of new development thoughts on UCAV control are proposed,including artificial brain based high-level autonomous control for UCAV,swarm intelligence based cooperative control for multiple UCAVs,hy-brid swarm intelligence and Bayesian network based situation assessment under complicated combating environments, bio-inspired hardware based high-level autonomous control for UCAV,and meta-heuristic intelligence based heterogeneous cooperative control for multiple UCAVs and unmanned combat ground vehicles(UCGVs).The exact realization of the proposed new development thoughts can enhance the effectiveness of combat,while provide a series of novel breakthroughs for the intelligence,integration and advancement of future UCAV systems.

关键词： bio-inspired intelligence unmanned combat aerial vehicle(UCAV) artificial brain autonomous control bayesian network bio-inspired hardware heterogeneous cooperative control

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Robust Control Study for Four-Wheel Active Steering Vehicle

Robust Control Study for Four-Wheel Active Steering Vehicle

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International Conference on Electrical and Control Engineering (ICECE)

作者： Feng Du Ji-shun Li Lun Li Dong-hong Si Key Laboratory for Machinery Design and Transmission System Henan University of Science and Technology Luoyang China Department of Informatics SBA Silesian University of Opava Karviná Czech Republic

Vehicle is a complex uncertain system with parameter perturbations and external disturbances; these uncertainties will easily result in the loss of vehicle driving stability. Tire cornering stiffness is a key influencing factor on maneuverability of vehicle. In order to maintain driving stability in vehicle cornering, through regarding tire cornering stiffness and outer disturbances as bounded uncertain parameters, a sliding mode controller applied to four-wheel steering vehicle is designed based on robust control theory. The dynamic simulation indicates that the sliding model controller designed not only can overcome the influence of uncertain factor on the maneuverability of 4WS vehicle and effectively prevent the loss of vehicle stability; but also ensure the steering quality of vehicle no significant change. It improves the active safety and handle ability of the 4WS vehicle during emergency obstacle avoidance and critical state accordingly.

关键词： Vehicles Vehicle dynamics Roads Tires Uncertainty Wheels Stability analysis

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