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Study on Site Specific Design Earthquake Ground Motion of Nuclear Power Plants in China
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作者 Zhou Bochang Li Xiaojun Li Yaqi 《Earthquake Research in China》 2008年第4期410-415,共6页
The main technical backgrounds and requirements are introduced with regard to earthquake ground motion design parameters in several domestic and American standards,codes and guides involved in the seismic analysis and... The main technical backgrounds and requirements are introduced with regard to earthquake ground motion design parameters in several domestic and American standards,codes and guides involved in the seismic analysis and design activities of nuclear power plants in China.Based on the research results from site seismic safety evaluation of domestic nuclear power plant projects in the last years,characteristics and differences of site specific design spectra are analyzed in comparison with standard response spectra,and the suitability of standard response spectra for domestic nuclear power plant projects is discussed. 展开更多
关键词 Nuclear power plant design earthquake ground motion Standard response spectra Site specific design spectra
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Study on Design Specifications and Wear Behavior of MCC
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作者 朱守星 朱世根 《Journal of Donghua University(English Edition)》 EI CAS 2006年第3期89-92,共4页
Main design parameters of MCC (metallic card clothing) which include front angle, base width, tooth pitch, and tooth point dimensions are discussed to investigate the carding effect of MCC. Experimental results show... Main design parameters of MCC (metallic card clothing) which include front angle, base width, tooth pitch, and tooth point dimensions are discussed to investigate the carding effect of MCC. Experimental results show that type C machine has the best carding effect, which is not ascribed to single factor control but the integrated design optimization and good performance of wire teeth. In comparison with the teeth design, the wire performance is another important factor that influences the perfommnce of modem high efficient production carding machine. 展开更多
关键词 MCC design specification zoire performance
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A Trace-state Based Approach to Specification and Design of Parallel Programs
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作者 He Jifeng Oxford University Computing LaboratoryProgramming Research Group Parks Road, Oxford OXl 3QD, England 《计算机工程》 CAS CSCD 北大核心 1996年第S1期91-105,共15页
In this paper they deal with the issue of specification and design of parallel communicatingprocesses. A trace-state based model is introduced to describe the behaviour of concurrent programs. They presenta formal sys... In this paper they deal with the issue of specification and design of parallel communicatingprocesses. A trace-state based model is introduced to describe the behaviour of concurrent programs. They presenta formal system based on that model to achieve hierarchical and modular development and verification methods. Anumber of refinement rules are used to decompose the specification into smaller ones and calculate program fromthe 展开更多
关键词 COMM A Trace-state Based Approach to specification and design of Parallel Programs
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CONVEX CONTROLLER DESIGN APPLIED TO AC INDUCTION MOTOR TO SATISFY MULTIPLE SIMULTANEOUS SPECIFICATIONS
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作者 LEE Seung-Ju SUN Dong MILLS James K 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2006年第4期475-479,共5页
The application of a closed-loop specification oriented feedback control design method, which addresses the design of controllers to satisfy multiple simultaneous conflicting closed-loop performance specifications is ... The application of a closed-loop specification oriented feedback control design method, which addresses the design of controllers to satisfy multiple simultaneous conflicting closed-loop performance specifications is presented. The proposed approach is well suited to the design of controllers which must meet a set of conflicting performance specifications. Gain tuning is central to the design process, however, the tuning process is greatly simplified over that presented by the problem of tuning a PID controller for example. The proposed control method is applied to an AC induction motor, with an inner-loop flux vector controller applied to design a position control system. Experimental results verify the effectiveness of this method. 展开更多
关键词 Convex controller design Multiple simultaneous specifications AC induction motor Nonlinear control
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Highway bridge seismic design:summary of FHWA/MCEER project on seismic vulnerability of new highway construction 被引量:3
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作者 Ian M.Friedland Ian G.Buckle George C.Lee 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2002年第1期10-19,共10页
The Federal Highway Administration (FHWA) sponsored a large,multi-year project conducted by the Multidisciplinary Center for Earthquake Engineering Research (MCEER) titled'Seismic Vulnerability of New Highway Cons... The Federal Highway Administration (FHWA) sponsored a large,multi-year project conducted by the Multidisciplinary Center for Earthquake Engineering Research (MCEER) titled'Seismic Vulnerability of New Highway Construction'(MCEER Project 112),which was completed in 1998.MCEER coordinated the work of many researchers,who performed studies on the seismic design and vulnerability analysis of highway bridges,tunnels,and retaining structures. Extensive research was conducted to provide revisions and improvements to current design and detailing approaches and national design specifications for highway bridges.The program included both analytical and experimental studies,and addressed seismic hazard exposure and ground motion input for the U.S.highway system;foundation design and soil behavior: structural importance,analysis,and response:structural design issues and details;and structural design criteria. 展开更多
关键词 Seismic design specifications BRIDGES seismic hazard exposure ground motion input structural response analysis foundation design soil behavior
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Towards establishing practical multi-hazard bridge design limit states 被引量:3
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作者 Zach Liang George C.Lee 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2013年第3期333-340,共8页
In the U.S., the current Load and Resistance Factor Design (LRFD) Specifications for highway bridges is a reliability-based formulation that considers failure probabilities of bridge components due to the actions of... In the U.S., the current Load and Resistance Factor Design (LRFD) Specifications for highway bridges is a reliability-based formulation that considers failure probabilities of bridge components due to the actions of typical dead load and frequent vehicular loads. Various extreme load effects, such as earthquake and vessel collision, are on the same reliability-based platform. Since these extreme loads are time variables, combining them with not considered frequent. non- extreme loads is a significant challenge. The number of design limit state equations based on these failure probabilities can be unrealistically large and unnecessary from the view point of practical applications. Based on the opinion of AASHTO State Bridge Engineers, many load combinations are insignificant in their states. This paper describes the formulation of a criterion to include only the necessary load combinations to establish the design limit states. This criterion is established by examining the total failure probabilities for all possible time-invariant and time varying load combinations and breaking them down into partial terms. Then, important load combinations can be readily determined quantitatively, 展开更多
关键词 multi-hazards load and resistance factor design re.liability based bridge design specifications design limit state equations
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Design of LD in-band direct-pumping side surface polished micro-rod Nd:YVO_4 laser
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作者 张文启 王飞 +1 位作者 柳强 巩马理 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第2期195-199,共5页
To diminish the thermal load, two ways, that is, in-band direct pumping and micro-rod crystal, could be adopted at the same time. The efficiency of LD in-band direct-pumping side surface polished micro-rod Nd:YVO_4 l... To diminish the thermal load, two ways, that is, in-band direct pumping and micro-rod crystal, could be adopted at the same time. The efficiency of LD in-band direct-pumping side surface polished micro-rod Nd:YVO_4 laser is numerically analyzed. By optimizing parameters such as crystal length, laser mode radius, pump beam radius, doping concentration and crystal cross-section size, the overall efficiency can reach over 50%. It is found that with micro-rod crystal implemented in the laser oscillator, high overall efficiency LD in-band direct-pumping Nd:YVO_4 laser could be realized. High efficiency combined with low thermal load makes this laser an outstanding scheme for building high-power Nd:YVO_4 lasers. 展开更多
关键词 diode-pumped lasers design of specific laser systems efficiency
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Theoretical study of power amplification in tapered fiber with multi-seed parallel injection
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作者 肖起榕 任海翠 +2 位作者 李丹 巩马理 闫平 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第11期325-330,共6页
We proposed the concept of parallel injection power amplification. A tapered fiber amplifier with multi-seed sources by the way of parallel injection was studied. The lower-order modes are excited and more than 90% of... We proposed the concept of parallel injection power amplification. A tapered fiber amplifier with multi-seed sources by the way of parallel injection was studied. The lower-order modes are excited and more than 90% of the input signal power remains in the fiber core if optimal injection and taper design are set. The power in the doped-core is amplified with high optical-optical efficiency. When light is propagating along the fiber, the higher-order modes are filtered which results in the high output beam quality. Incoherent combination of multi-seed lights launched through the wide end gives rise to the output power of several kW. 展开更多
关键词 design of specific laser system optical propagation transmission and absorption physical optics
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