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13篇 您的检索式:作者名="HengZhang"
    题名 作者 年代 出处 被引量
1Study on Federated Architecture for GPS/INS/TRN Integrated Navigation System显示文摘Based on the information fusion theory, a kind of integrated navigation system integration for cruise missile is presented in this paper. Besides, the way with which the system is integrated and the related data fusion technique are discussed. Information-fusion-based hybrid navigation system integration can fully utilize information provided by all kinds of navigation sensor subsystem and can improve the precision of the system effectively. Simultaneously, the reconstructing ability ensures the system of great reliability.Wang, Yufei Huang, Xianlin Hu, Hengzhang 2000Journal of Systems Engineering and Electronics2000,11,1:3
2Covalently Bound Benzyl Ligand Promotes Selective Palladium‐Catalyzed Oxidative Esterification of Aldehydes with Alcohols显示文摘ChaoLiu ShanTang LiweiZheng DongLiu HengZhang AiwenLei 2012Angew Chem Int Ed2012,,23:1
3Prognostic significance of integrin‐linked kinase1 overexpression in astrocytoma显示文摘JunLi HengZhang JuehengWu HongyuGuan JieYuan ZhengsongHuang MengfengLi 2010Int. J. Cancer2010,,6:1
4Output feedback variable structure control for uncertain system with input nonlinearities显示文摘Yi Shen Chunmei Liu Hengzhang Hu 2000Journal of Guidance Control and Dynamics2000,23,4:1
5Novel integrated optimization algorithm for trajectory planning of robot manipulators based on integrated evolutionary programming显示文摘Optimal trajectory planning for robot manipulators plays an important role in implementing the high productivity for robots.The performance indexes used in optimal trajectory planning are classified into two main categories:optimum traveling time and optimum mechanical energy of the actuators.The current trajectory planning algorithms are designed based on one of the above two performance indexes.So far,there have been few planning algorithms designed to satisfy two performance indexes simultaneously.On the other hand,some deficiencies arise in the existing integrated optimization algorithms of trajectory planning.In order to overcome those deficiencies,the integrated optimization algorithms of trajectory planning are presented based on the complete analysis for trajectory planning of robot manipulators.In the algorithm,two object functions are designed based on the specific weight coefficient method and 'ideal point' strategy.Moreover,based on the features of optimization problem,the intensified evolutionary programming is proposed to solve the corresponding optimization model.Especially,for the Stanford Robot,the high-quality solutions are found at a lower cost.XiongLUO XiaopingFAN HengZHANG TefangCHEN 2004控制理论与应用(英文版)2004,2,4:1
6An Application of Optimal Preview Control in Terrain Following System显示文摘An optimal preview method is applied to the design of terrain following controller for cruise missile. In this method, tracking errors and control increments are both considered in the quadratic cost function. Integrating the general optimal servo system with a preview feedforward compensation that feeds forward future command and future disturbance produces an optimal preview servo system. In the terrain following system, the flight altitude of the cruise missile is a command signal, and its future information can be known apriori. Hence, we have designed a terrain following controller with a basic state feedback and a feedforward compensation for future altitude information. Simulation results show that the performance of the terrain following system with such an optimal preview controller has been improved dramatically.Li Dongmei Dept. of Precision Instrument and Mechanics, Tsinghua University, Beijing 100084, P.R.China Zhou Di, Hu Zhenkun & Hu Hengzhang Dept. of Control Science and Engineering, Harbin Institute of Technology, Harbin 150001, P.R.China 2002Journal of Systems Engineering and Electronics2002,13,1:0
7THE SHEAR-THINNING PHENOMENON OF BAGASSE KRAFT BLACK LIQUOR FLUID显示文摘The flow curvesshear-rate rangeby using theof bagasse Kraft black liquor over aof 10-1 s- 1-103s- 1 were investigatedRheometric RFSII rheometerExperimental results show that Bagasse black liquorsare non-Newtonian fluids instead of Newtonian fluidsat higher solids contents, and the viscosities of blackliquor would decrease about 2-3 orders of magnitudewith an increase in the shear rates. The apparentviscosity and flow behavior of bagasse black liquorare also affected by its solids content, and the highersolids content the more shear-thinning bagasse blackliquor fluid is. In addition, the power-law equationwas utilized to fit these flow curves at differentconditions. Finally, the significances ofshear-thinning properties of bagasse black liquor inthe chemical recovery system, such as frictioncalculation of pipe and design optimization of thewhole recovery system, were presented.RendangYang KefuChen JunXu HengZhang QifengChen JinWang 2004天津科技大学学报2004,19,A01:0
8STUDY ON VISCOELASTIC BEHAVIOR OF PAPER COATING显示文摘The flow behavior of paper coating is critical to the coating operation. In this work, the influence of the added agents on the flow behavior and the viscoelastic behavior is investigated using rheometer in steady and dynamic oscillatory modes.HengZhang KefuChen RendangYang 2004天津科技大学学报2004,19,A01:0
9EFFECT OF THICKENERS ON PAPER COATING VISCOELASTIC BEHAVIOR显示文摘Paper coating has a viscoelastic character, which affected by dissolved polymer in the aqueous phase. The different thickeners have different effects on Paper Coating viscoelasticity behavior. CMC, PVA and CMS are compared in this article, and CMC have the strongest effect than the others.HengZhang KefuChen RendangYang ZhengnanXuan 2004天津科技大学学报2004,19,A01:0
10High Performance Servo-System of a Motor in Driect Drive Robotics显示文摘This paper decribes the control of a high performance variable reluctance motor system for direct drive robotics and industrial automation. The control system of a motor comists of a drive unit and a digital controller, possessing two functions of tbe analog dosed-loop control of motor velocity and the digit dosed-loop control of motor position. Then it discusses the closed-loop control of current in the three phases of the motor and the control of the lead angle of the motor. Finally, it suggests a design of the control circuits of motor current, velocity and position. The closed loop control of the motor position is achieved by a digit cotroller which consists of a microprocessor and other electronic components. It can control two variable reluctance motors simultaneusly. In order to be used for directly driving robots, the digit cotroller is equipped with a universal interface.Feng Yong Wang Yan Hu Hengzhang (Department of Electrical Engineering) 1990哈尔滨工业大学学报1990,22,3:0
11SYNTHETICAL REMOTE SENSING SURVEY AND MAPPING IN LONGTAN HYDROELECTRIC STATIONLin Hengzhang, Wei Chengjie (Institute of Remote Sensing Applications, Academia Sinica) 1990遥感信息1990,12,A02:0
12REMOTE SENSING APPLICATION RESEARCH OF WATER POWER AT THE INITIAL EXPLOITING STAGE IN THE LOWER REACHES OF YALONG RIVERLin Hengzhang, Xu Gengqin (Institute of Remote Sensing Appilcations, Academia Sinica) He Jianbang (National Lab of Resources and Environment Information System) 1990遥感信息1990,12,A02:0
13A robust lateral shift free(LSF)electrothermal micromirror with flexible multimorph beams显示文摘Electrothermal bimorph-based scanning micromirrors typically employ standard silicon dioxide(SiO_(2))as the electrothermal isolation material.However,due to the brittle nature of SiO_(2),such micromirrors may be incapable to survive even slight collisions,which greatly limits their application range.To improve the robustness of electrothermal micromirrors,a polymer material is incorporated and partially replaces SiO_(2) as the electrothermal isolation and anchor material.In particular,photosensitive polyimide(PSPI)is used,which also simplifies the fabrication process.Here,PSPIbased electrothermal micromirrors have been designed,fabricated,and tested.The PSPI-type micromirrors achieved an optical scan angle of±19.6°and a vertical displacement of 370μm at only 4 Vdc.With a mirror aperture size of 1 mm×1 mm,the PSPI-type micromirrors survived over 200 g accelerations from either vertical or lateral directions in impact experiments.In the drop test,the PSPI-type micromirrors survived falls to a hard floor from heights up to 21 cm.In the standard frequency sweeping vibration test,the PSPI-type micromirrors survived 21 g and 29 g acceleration in the vertical and lateral vibrations,respectively.In all these tests,the PSPI-type micromirrors demonstrated at least 4 times better robustness than SiO_(2)-type micromirrors fabricated in the same batch.Hengzhang Yang Anrun Ren Yingtao Ding Lei Xiao Teng Pan Yangyang Yan Wenlong Jiao Huikai Xie 2023Microsystems & Nanoengineering2023,9,4:0
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