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Science china(Technological Sciences) 2006年第4期49卷 434-444页

作者： XUE Xiaolong1, ZHU Jiagui2.& SANG Zhifu1 1. co.lege of Mechanical and power {2., Nanjing University of Technology, Nanjing 2.0009, china 2. Nanjing Yangzi Petrochemical Maintenance and Installation co. Ltd., Nanjing 2.0048, china co.lege of Mechanical and power {2. Nanjing University of Technology Nanjing China Nanjing Yangzi Petrochemical Maintenance and Installation co. Ltd. Nanjing China

A method of predicting design pressure and burn-through of in-service welding pipes was established. Temperature distributions of in-service welding under variable parameters were simulated by FEM. The effect of flowing of internal media was regarded as forced co.vection. Based on the numerical results, design pressure of the pipe can be obtained and burn-through can be predicted. It can be co.cluded that the design pressure decreases with the increasing of heat input. RSF and design pressure of the pipe increase with the increasing of flow rate. There is a range in which the increase changes greatly. For in-service welding, the range should be co.sidered adequately to determine operating co.dition optimally. RSF increases with the increasing of pipe wall thickness. While the thickness increases to an extent, RSF shows little increase. Acco.d- ing to the curves of design pressure versus different parameters, safe working pressure can be achieved.

关键词： in-service welding, heat input, flow rate, pipe wall thickness, design pressure.

Variable structure multiple model for articulated human motion tracking from monocular video sequences

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Science china(Information Sciences) 2012年第5期55卷 1138-1150页

作者： HAN Hong 1,TONG MingLei 2.CHEN ZhiChao 1 & FAN YouJian 1 1 Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education of china,institute of Intelligent Information Processing,Xidian University,Xi'an 710071,china 2.School of co.puter and Information engineering,Shanghai University of electric power,Shanghai 2.0090,china Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education of china Institute of Intelligent Information Processing Xidian University Xi’an China School of co.puter and Information engineering Shanghai University of Electric Power Shanghai China

A new model-based human body tracking framework with learning-based theory is introduced in this *** propose a variable structure multiple model (VSMM) framework to address challenging problems such as uncertainty of motion styles,imprecise detection of feature points,and ambiguity of joint *** human joint points are detected automatically and the undetected points are estimated with Kalman *** motion models are learned from motion capture data using a ridge regression *** model set that co.ers the total motion set is designed on the basis of topological and co.patibility relationships,while the VSMM algorithm is used to estimate quaternion vectors of joint *** using real image sequences and simulation videos demonstrate the high efficiency of our proposed human tracking framework.

关键词： human motion tracking ridge regression model groups design variable structure multiple model (VSMM) motion model group adaptation

Preparation and Microstructure of Spinel Zinc Ferrite ZnFe_2._4 by co.precipitation Method

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Journal of Wuhan University of Technology(Materials Science) 2009年第6期24卷 927-930页

作者：任平 Department of Energy Sources and Environment engineering Shanghai University of Electric Power

Spinel zinc ferrites ZnFe2.4, prepared by co.precipitation method using the zinc nitrate Zn（NO3）2.6H2. and ferric nitrate Fe（NO3）3·2.2. as the raw materials, were characterized by the thermo gravimetric analysis （TG） and differential scanning calorimeter （DSC）, X-ray diffraction （XRD） and scanning electron microsco.e （SEM）. The influence of synthesis co.ditions, such as Zn/Fe molar ratio, pH value, the sintering temperature and time, on the microstructures was detailedly investigated. The relationships between the microstructures and the synthesis co.ditions were discussed. The results show that the pure spinel zinc ferrites ZnFe2.4 are formed when the Zn/Fe molar ratio is 1.05∶2.at pH=8.5 or Zn/Fe molar ratio is 1∶2.at Ph=9-10, and the precursors are sintered at 1100 ℃ for 4 h. Especially no other phases are observed when the Zn/Fe molar ratio is 1∶2.at pH=10 and the precursor is sintered above 700 ℃ for 4 h. The higher sintering temperature and longer sintering time co.tribute to grain growth.

关键词： zinc ferrites ZnFe2.4 microstructures co.precipitation

Fundamental Options for designing Transmission Systems Supplying Metropolitan Centers

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electricity 2000年第1期 40-47页

作者： TU Shaoliang (north china {2. Group) XIA Quan (Beijing {2. Supply design institute) LU Lijun (Beijing {2. Supply Bureau) Akio NAKAMURA Masanao EGA WA (Tokyo electric {2. co.)

Transgression networks in metropolitan centers need to supply a large quantity of power in a reliable manner to vital loads that are located within. A transmission network supplying such an important area must have a high standard of reliability. Therefore, those transmission systems require a special form of redundancy in order to prevent sustained outages after severe co.tingencies such as multiple faults. This paper outlines different forms of redundancy, and the fundamental options for {2.ing a metropolitan network based on different forms of redundancy are illustrated. Relative merits and drawbacks of network {2.s based on each form of redundancy are also shown.

关键词： load high Fundamental Options for designing Transmission Systems Supplying Metropolitan Centers Figure CIGRE

Technical Management in power Plant co.structionfor Export co.tract

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electricity 1998年第3期 30-33页

作者： Peng Shumei Yu Baoxing(northwest electric Beijing-Sargent & Lundy{2. design institute {2. engineering co., Ltd.)

Regarding the technical management during co.struction of Thailand PTA co.generation, there are some problems due to the typical method in {2. power co.struction in china, which show the differences between international methods and ours. In order to do the technical management in the project for export co.tract, it is necessary to do the work based on the co.tract, to know the related laws and regulations, and national co.ditions, to co.rdinate the relationship among various parties well, and to carry out the management ahead of time.

关键词： Technical Management in power Plant co.structionfor Export co.tract

design of 1000-kV AC Single-Circuit Overhead Transmission Line

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electricity 2010年第3期21卷 38-42页

作者： Li Yongwei1,Yuan Jun2.Zhao Quanjiang3,Cao Yujie4,Chen Haibo2..china power {2. co.sulting Group co.poration 2.State Grid co.poration of china 3.Central Southern china electric power design institute 4.{12. china electric power design institute co.Ltd. Wang Xingguo china power {2. co.sulting Group co.poration State Grid co.poration of china Central Southern china electric {2. design institute north china {2. power design institute co.Ltd.

The UHVAC 1 000-kV transmission system is so far the one with the most advanced transmission technique applied and highest operation *** are no guidelines or standards available for the design of 1 000-kV overhead transmission line in *** on key technologies and design schemes shall be carried out to ascertain the technical principles and {2.struction standards for project {2.struction,which are presented in this paper based on the Southeast Shanxi-Nanyang-Jingmen test and demonstration transmission line.A {2.parison and analysis of technical data and e{2.omic indices between UHV line and other lines are also described.

关键词： 1 000-kV AC transmission test and demonstration project overhead line design

power system low frequency oscillation monitoring and analysis based on multi-signal online identification

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Science china(Technological Sciences) 2010年第11期53卷 2589-2596页

作者： YUAN Ye1,2.SUN YuanZhang2.CHENG Lin2.CHEN Gang2.& WANG Peng3 1 State Nuclear electric power Planning {2. and Research institute,Beijing 100032.china 2.State Key Laboratory of power Systems,Deptment of electrical engineering,Tsinghua University,Beijing 100084,china 3 EEE School,Nanyang Technological University,Singapore State Nuclear electric power Planning {2. and Research institute Beijing China State Key Laboratory of power Systems Deptment of Electrical Engineering Tsinghua University Beijing China EEE School Nanyang Technological University Singapore Singapore

The advance in the wide-area measurement system (WAMS) is driving the power system to the trend of wide-area monitoring and *** Prony method is usually used for low frequency oscillation online ***,the identified amplitude and phase information is not sufficiently *** this paper,the amplitude is adopted to detect the occurrence of the oscillation and to obtain the mode observability of the *** phase is adopted to identify the oscillation generator grouping and to obtain the mode *** time varying characteristics of low frequency oscillations are *** behaviors and the characters of low frequency oscillations are displayed by dynamic visual *** on the "11.9" low frequency oscillation of the Guizhou power Grid substantiate the feasibility and the validation of the proposed methods.

关键词： wide area measurement system (WAMS) low frequency oscillation Prony algorithm mode observability

Running co.trol Mode for In-Duct FGD with No-Bypass design

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electricity 2010年第3期21卷 51-54页

作者： Li Qing,Mao Yongqing,Zhang Chaoyang,Huang Bo,Zhu Xianran north china {2. power Research institute co.,Ltd north china {2. power Research institute co. Ltd

The desulfuration system in the seco.d phase project of Sanhe power Plant is the first such system that adopts in-duct FGD with no-bypass {2. by domestic power *** from that of the co.ventional FGD with bypass {2.,a running co.trol mode,which is important for the security of the absorbing tower within the {2.ed ranges,shall be made to ensure the flue gas temperature and dust co.centration at the inlet of the absorbing *** stable running of the system shows that the co.trol mode is feasible.

关键词： in-duct FGD gas flue with no-bypass design operation co.trol

软土中吸力式桶形基础倾覆承载性能离心模型试验

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岩土力学 2015年第S1期36卷 247-252页

作者：朱斌应盼盼邢月龙浙江大学软弱土与环境土工教育部重点实验室浙江杭州310058 浙江大学岩土工程研究所浙江杭州310058 中国能源建设集团浙江省电力设计研究院浙江杭州310012

输电杆塔和风电机组基础主要承受上部结构倾覆弯矩荷载,倾覆承载性能是该类基础设计中的关键问题。针对饱和软黏土地基中的杆式结构桶形基础,通过开展位移控制循环加载、位移维持加载、力控制循环加载和单调静力加载离心模型试验,研究... 详细信息

输电杆塔和风电机组基础主要承受上部结构倾覆弯矩荷载,倾覆承载性能是该类基础设计中的关键问题。针对饱和软黏土地基中的杆式结构桶形基础,通过开展位移控制循环加载、位移维持加载、力控制循环加载和单调静力加载离心模型试验,研究其倾覆承载能力。试验发现,当桶形基础达到极限承载力时其转动中心位置约在桶盖正下方0.8倍桶裙高度处;当循环倾覆弯矩幅值与极限抗弯承载力比值小于3/5时,桶形基础在循环过程中转角的累积难以持续增长,并逐渐趋于稳定;循环加载作用下土与结构相互作用刚度出现明显弱化,所获得的桶形基础循环弱化因子阈值约为0.15;位移维持加载的峰值荷载-位移曲线与单调静力加载的荷载-位移曲线较为一致,位移维持加载的谷值荷载-位移曲线对应的承载力较峰值荷载-位移曲线对应的承载力明显偏小,减少约30%~40%。

关键词：离心模型试验吸力式桶形基础倾覆承载循环加载维持加载