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Research and design of china Integral reactor Plant innovative containment

Hedongli Gongcheng/Nuclear Power Engineering 2006年第6期27卷 91-93+98页

作者： Qin, Zhong National Key Laboratory of Reactor System Design Technology Nuclear Power Institute of China Chengdu 610041 China

china Integral reactor Plant (CIP) is a light water cooled, 300 MW power reactor under development by Chinese national key laboratory of reactor system design technology. CIP features an integral reactor vessel that contains the CRDM and major reactor coolant system components including reactor core, coolant pumps, once-through steam generators and pressurizer. This integral design approach eliminates the large coolant piping and large loss of coolant accident (LOCA), and thus provides with higher level of securities. This paper introduces the selection of CIP containment system, the design of containment, the determination of design pressure for containment and the calculation analysis of containment structure.

关键词： Pressurized water reactors

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An Adaptive Nonlinearity Compensation Scheme for OFDM Communication systems

An Adaptive Nonlinearity Compensation Scheme for OFDM Commun...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Yuanming Ding I. Nilkhamhang A. Sano Liaoning Key Laboratory of Intelligent Information Processing Dalian University Liaoning China Department of System Design Engineering Faculty of Science and Technology Keio University Yokohama Japan

An adaptive predistortion linearization is proposed to compensate for the nonlinear distortions induced by high power amplifiers (HPAs) in orthogonal frequency division multiplexing (OFDM) systems. By expressing the uncertain nonlinear input-output dynamics of HPA by a new simplified Volterra series model (VSM), a predistorter (i.e., compensator) is constructed based on identification of inverse system of the HPA. Once predistorter's parameters are obtained by RLS algorithm, when OFDM signals pass through the cascade system of the predistorter and the HPA, overall linearization from predistorter input to HPA output can be achieved even if HPA is uncertain. The effectiveness of the proposed predistortion method is validated by numerical simulation for 64-ary quadrature amplitude modulation OFDM (64QAM-OFDM) transmission systems

关键词： OFDM Predistortion Adaptive systems Nonlinear distortion High power amplifiers Nonlinear dynamical systems Power system modeling Resonance light scattering Numerical simulation Quadrature amplitude modulation

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Topological dynamics characterization for layered satellite networks

Topological dynamics characterization for layered satellite ...

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IEEE International Conference on Performance, Computing and Communications (IPCCC)

作者： Junfeng Wang Yuemei Hu Hongxia Zhou Mingtian Zhou College of Computer Science and Engineering University of Electronic Science and Technology ChengDu China National Key Laboratory of Integrated Information System Technology Institute of Software Chinese Academy and Sciences Beijing China Chongqing Communication College Chongqing China

The highly topological dynamics characterize the most fundamental property of satellite networks contrary to the terrestrial networks. This manifest feature directs the researches on various aspects of satellite networks, including routing and switching architecture selection, routing protocol and reliable transmission control protocol design and enhancement, etc,. The paper quantifies the dynamical activates of layered satellite network topologies. The number and length of network snapshots of one-layered satellite constellations are formulated concisely. The snapshot distributions of typical multi-layered constellations are also evaluated. With this work, it compensates for the simplified topological assumptions in many satellite network related investigations. The thorough understanding of this basic feature not only provides for an accurate quantification of network behavior, but also guides constellation design for future satellite networks

关键词： Low earth orbit satellites Satellite broadcasting Satellite constellations Routing protocols Network topology Next generation networking Quality of service Laboratories Information systems Communication system software

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A profile-based protein sequence alignment algorithm for a domain clustering database

A profile-based protein sequence alignment algorithm for a d...

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IEEE Symposium on Computational Intelligence and Bioinformatics and Computational Biology (CIBCB)

作者： Lin Xu Fa Zhang Zhiyong Liu Graduate School of Chinese Academy of Sciences China Key Laboratory of Computer System and architecture Institute of Computing Technology Chinese Academy and Sciences China National Natural Science Foundation China

Aiming at the two main shortcomings in Homology Modeling, we have designed and established a domain clustering database. Searching the database is a fundamental work for it. However, current alignment algorithms are mainly based on the sequences, ignoring the structure conservation in domain. This paper proposed a profile-based alignment which considers the structure information into the profile, based on the character of our domain database. We designed an experiment within the database. The results show that both the quality and sensitivity of our scheme are better than pure Smith-Waterman and sequence-based profile algorithms. We strongly believe that this work can help to improve the protein structure prediction

关键词： Protein sequence Clustering algorithms Databases Sequences Heuristic algorithms Laboratories Computer architecture Algorithm design and analysis Computational efficiency Acceleration

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New method of precise measurement for radial rotation motion error

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Jiliang Xuebao/Acta Metrologica Sinica 2006年第SUPPL.期27卷 80-84页

作者： Lei, Xian-Qing Li, Yan Li, Ji-Shun Ma, Wei Xue, Yu-Jun Cui, Zhi-Zhong School of Machinery and Precision Instrument Engineering Xi'an University of Technology Xi'an 710048 China Henan Key Laboratory of Modern Mechanical Design and Transmission System Luoyang 471003 China Henan Key Laboratory of Advanced Manufacturing Technology Luoyang 471003 China School of Mechatronics Engineering Henan University of Science and Technology Luoyang 471003 China

The roundness error and rotation motion error of the least square center of measured section are separated by applying the roundness error separation principle based on the three-point method. Furthermore, the relationship between the pure rotation motion error and the initial position(linear eccentricity) of the least square center of measured section is described. The mathematical expression for separating the pure rotation motion error is put forward, in which the orthogonality of the trigonometric function and the above-obtained relationship is used. The experimental result indicates that the precision measurement of the radial rotation motion error of the gyro-axle can be achieved by three-point method.

关键词： Error separation technique(EST) Metrology Rotation motion Three-point method

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Development of core fuel management code system for WWER-type reactors

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Nuclear science and Techniques 2006年第5期000卷

作者： XIA BangYang WANG Tao XIE ZhongSheng National Key Laboratory for Reactor System Design Technology Chen gdu 610041 China Xi'an Jiaotong University Xi'an 710049 China Shanghai Jiaotong University Shanghai 200030 China Xi'an Jiaotong University Xi'an 710049 China

In this article, a core fuel management program for hexagonal pressurized water type WWER reactors (CFMHEX) has been developed, which is based on advanced three-dimensional nodal method and integrated with thermal hydraulic code to realize the coupling of neutronics and thermal-hydraulics. In CFMHEX, all these feedback effects such as burnup, power distribution, moderator density, and control rod insertion are considered. The verification and validation of the code system have been examined through the IAEA WWER-1000-type Kalinin NPP benchmark problem. The numerical results are in good agreement with measurements and are close to those of other international institutes.

关键词： Fuel management WWER Nodal method

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CHARACTERISTICS OF FLUCTUATION PRESSURE CAUSED BY THROTTLE ORIFICE IN PIPELINE

CHARACTERISTICS OF FLUCTUATION PRESSURE CAUSED BY THROTTLE O...

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第十三届国际核工程大会

作者： Qing Mao Jinghui Zhang Yushan Luo Haijun Wang Quan Duan Xi’an Jiaotong University National Key Laboratory for Reactor System Design Technology Nuclear Power Institute of China

From the Flow-Induced Vibration(FIV) point of view,throttle orifice can be considered as one of the essential singularities in the system that disturbs the flow and causes structure *** nu

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Preparation of Monodispersed O/W Emulsion by Ceramic External Membrane Emulsification system——Preliminary Study on Integrated Ceramic Membrane Emulsification reactor

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Chinese Journal of Chemical Engineering 2004年第4期12卷 574-576页

作者：景文珩吴俊邢卫红徐南平 Membrane Science & Technology Research Center Key Laboratory of Material-oriented Chemical Engineering of Jiangsu Province Nanjing University of Technology Nanjing 210009 China Membrane Science & Technology Research Center Key Laboratory of Material-oriented Chemical Engineering of Jiangsu Province Nanjing University of Technology Nanjing 210009 China new reactor with integrated conventional slurry stirred reactor and ceramic external membrane emul-sification system was introduced in this paper. Toluene and toluene containing surfactant was separately used as dispersed phase for preparation of emulsions. Two kinds of emulsions were prepared and compared. The volume average sizes of prepared emulsions were 3.53 μm and 3.6μm respectively. The results showed that the droplet sizes of two kinds of emulsions were similar but the monodispersed emulsion was only obtained with addition of surfactant into the dispersed phase.

A new reactor with integrated conventional slurry stirred reactor and ceramic external membrane emulsification system, was introduced in this paper. Toluene and toluene containing surfactant was separately used as dispersed phase for preparation of emulsions. Two kinds of emulsions were prepared and compared. The volume average sizes of prepared emulsions were 3.53μm and 3.6μm respectively. The results showed that the droplet sizes of two kinds of emulsions were similar, but the monodispersed emulsion was only obtained with addition of surfactant into the dispersed phase.

关键词： membrane emulsification ceramic membrane emulsion

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A non-data-aided SNR estimation algorithm for QAM signals

A non-data-aided SNR estimation algorithm for QAM signals

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International Conference on Communications, Circuits and systems (ICCCAS)

作者： Hua Xu Zupeng Li Hui Zheng National Key Laboratory of Signal Processing IETTC Chengdu China National Digital Switching System Engineering & Technological R&D Center Zhengzhou China The University of Electronic Science & Technology Chengdu China

ISBN: (纸本)0780386477

We propose a non-data-aided (NDA) signal-to-noise-ratio (SNR) estimation algorithm for quadrature amplitude modulation (QAM) signals in an additive white Gaussian noise (AWGN) channel. The NDA SNR estimation algorithm for QAM signals is derived based on a statistical ratio of observables over a block of data. The simple analysis and computer simulation for some kinds of QAM signals have been done, the results of which have proved that all the tested QAM signals can be effectively estimated by this algorithm.

关键词： Quadrature amplitude modulation Signal to noise ratio AWGN Amplitude estimation Additive white noise Data analysis Signal analysis Algorithm design and analysis Computer simulation Testing

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A rough set approach for planner evaluation

A rough set approach for planner evaluation

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IEEE International Conference on systems, Man and Cybernetics

作者： B.K. Sy Wang Jiaxin Pattern Analysis and Machine Intelligence Group System Design Engineering Department University of Waterloo Waterloo ONT Canada Department of Computer Science CUNY Flushing NY USA The State Key Laboratory of Intelligent Technology and Systems Department of Computer Science and Technology Tsinghua University Beijing China

This paper discusses a rough set approach for evaluating solutions of scheduling problems. Algorithms for solving scheduling problems are planners and the scheduling problems are modelled as constraint satisfaction problems. Conventional approach for the analysis of algorithms often focuses on the time and representational complexities, and assumes an identical cost on all operations. The proposed rough set approach augments conventional approaches for the analysis of algorithms in two ways: 1) it permits the consideration of different costs arising from different operations; and 2) it allows one to define a new utility for a complexity analysis.

关键词： Algorithm design and analysis Processor scheduling Set theory Machine intelligence Computer science Costs Search problems Educational institutions Pattern analysis system analysis and design

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