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第六届工程机械与车辆工程新进展国际学术会议

作者： Li Xiao-ming Liu Si-yuan Zhang Jian-jiao Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University) Ministry of Education of China Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Scienc(Yanshan University)e Ministry of Education of China Yanshan University

Due to the fuzziness and incompleteness of hydraulic pump single fault signal,sometimes we cannot accurately assess the working state of hydraulic *** extracting the characteristic vector

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Profile Division and Programmatic Modeling of Tetrahedral Truss Deployable Antennas

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Zhongguo Jixie Gongcheng/China Mechanical Engineering 2019年第12期30卷 1400-1408页

作者： Han, Bo Xu, Yundou Guo, Luyao Zhang, Shuo Yao, Jiantao Zhao, Yongsheng Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University QinhuangdaoHebei066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University QinhuangdaoHebei066004 China

Tetrahedral truss deployable antennas were studied, and a simple profile division method was proposed. Based on MATLAB and SOLIDWORKS, a programmatic modeling method was proposed. Custom software development for SOLIDWORKS was completed by VBA programming language, and visual operation interfaces were designed. Two examples of deployable antenna mechanisms were used to verify the correctness of the profile division method and the programmatic modeling processes. The proposed profile division method proposed herein is simple and the quality of the profile mesh is good, the method of programmatic modeling is convenient and quick to model the antenna mechanisms, and the overall design efficiency is greatly improved. © 2019, China Mechanical Engineering Magazine Office. All right reserved.

关键词： MATLAB

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Embodied water analysis for Hebei Province, China by input-output modelling

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Frontiers of Earth science 2018年第1期12卷 72-85页

作者： Siyuan LIU Mengyao HAN Xudong WU Xiaofang WU Zhi LI Xiaohua XIA Xi JI Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Qinhuangdao 066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science Ministry of Education of China Yanshan University Qinhuangdao 066004 China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China College of Engineering Peking University Beijing 100871 China School of Economics Renmin University of China Beijing 100872 China School of Economics Peking University Beijing 100871 China

With the accelerating coordinated development of the Beijing-Tianjin-Hebei region, regional eco- nomic integration is recognized as a national strategy. As water scarcity places Hebei Province in a dilemma, it is of critical importance for Hebei Province to balance water resources as well as make full use of its unique advantages in the transition to sustainable development. To our knowledge, related embodied water accounting analysis has been conducted for Beijing and Tianjin, while similar works with the focus on Hebei are not found. In this paper, using the most complete and recent statistics available for Hebei Province, the embodied water use in Hebei Province is analyzed in detail. Based on input-output analysis, it presents a complete set of systems accounting framework for water resources. In addition, a database of embodied water intensity is proposed which is applicable to both intermediate inputs and final demand. The result suggests that the total amount of embodied water in final demand is 10.62 billion m3, of which the water embodied in urban household consumption accounts for more than half. As a net embodied water importer, the water embodied in the commodity trade in Hebei Province is 17.20 billion m3. The outcome of this work implies that it is particularly urgent to adjust industrial structure and trade policies for water conservation, to upgrade technology and to improve water utilization. As a result, to relieve water shortages in Hebei Province, it is of crucial importance to regulate the balance of water use within the province, thus balancing water distribution in the various industrial sectors.

关键词： input-output analysis Hebei Province embo-died water embodied water intensity

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Hybrid algorithm combining genetic algorithm with back propagation neural network for extracting the characteristics of multi-peak Brillouin scattering spectrum

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Frontiers of Optoelectronics 2017年第1期10卷 62-69页

作者： Yanjun ZHANG Jinrui XU Xinghu FU Jinjun LIU Yongsheng TIAN The Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province School of Information Science and Engineering Yanshan University Qinhuangdao 066004 China Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Key Laboratory of Advanced Forging & Stamping Technology and Science College of Mechanical Engineering Yanshan University Qinhuangdao 066004 China

In this study, a hybrid algorithm combining genetic algorithm （GA） with back propagation （BP） neural network （GA-BP） was proposed for extracting the characteristics of multi-peak Brillouin scattering spectrum. Simulations and experimental results show that the GA-BP hybrid algorithm can accurately identify the position and amount of peaks in multi-peak Brillouin scattering spectrum. Moreover, the proposed algorithm obtains a fitting degree of 0.9923 and a mean square error of 0.0094. Therefore, the GA-BP hybrid algorithm possesses a good fitting precision and is suitable for extracting the characteristics of multi-peak Brillouin scattering spectrum.

关键词： fiber optics Brillouin scattering spectrum,genetic algorithm （GA） back propagation （BP） neural network multi-peak spectrum

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Effects of physical parameters of multiphase flow on fire water monitor based on Fluent

Effects of physical parameters of multiphase flow on fire wa...

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CSAA/IET International Conference on Aircraft Utility Systems (AUS 2018)

作者： Xiaoming Yuan Shiyi Zhao Chu Wang Lijie Zhang Hebei Key Laboratory of Heavy Machinery Fluid Power Transmission and Control with the Key Laboratory of Advanced Forging & Stamping Technology and Science Yanshan University Qinhuangdao China

ISBN: (纸本)9781510872745

To improve the jet performance of a fire water monitor, the monitor head with three different inner contour lines were designed. Based on FLUENT, the calculation domain was defined geometrically and then the cloud pictures of the flow velocity, pressure, turbulence kinetic energy and multiphase flow of the fluid field in the nozzle and jet were obtained, based on which the optimal structure of each model can be selected. The simulation result can provide the theoretical reference for the design of a monitor head.

关键词： Fire water monitor Jet performance Fluent

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Correlation between Zener-Hollomon parameter and DRX critical parameters of a Fe-Cr-Ni super austenitic stainless steel during hot deformation

Correlation between Zener-Hollomon parameter and DRX critica...

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4th International Conference on Engineering Materials, Energy, Management and Control, MEMC 2014

作者： Hu, Chao Bei Guo, Bao Feng Zhang, Yong Tao Jin, Miao Yang, Guan Qiang Ma, Ming Fang Key Laboratory of Advanced Forging and Stamping Technology and Science Ministry of Education Yanshan University Qinhuangdao Hebei 066004 China Shanghai Dianji University School of Mechanical Engineering Shanghai 200245 China Shanghai Heavy Machinery Plant Co. Ltd. Shanghai 200245 China

ISBN: (纸本)9783038351610

Calculation of the critical condition for the initiation of DRX is of considerable interest for the modeling of industrial processes but it strongly depends on the chemical composition of the material, the grain size prior to deformation, and the deformation conditions (T and Ε). This paper was therefore to show an approach that allows for accurate but convenient identification of the occurrence of DRX. For a Fe-Cr-Ni super stainless steel, the results show that there is a linear relationship between σc and lnZ (σc = 457.26 - 12.52lnZ). In addition, within the entire range of temperature and strain rate studied, it can be found that the values of both σc, and σp, or Εc, and Εpkeep similar variation trends, respectively. Finally, it was found that the critical ratios of both σc/σp and Εc/Εp remain fairly constant (≈0.92 and ≈0.47, respectively). © (2014) Trans Tech Publications, Switzerland.

关键词： Strain rate

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Matching Analysis of Pilot Valve and Multi-way Valve for a Type of Bulldozer

Matching Analysis of Pilot Valve and Multi-way Valve for a T...

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2015 International Conference on Fluid Power and Mechatronics

作者： Wang Lihang Hu Shuwei Yang Lele Zhang Lijie Hebei Key Laboratory of Heavy Mechinery Fluid Power Transimission and Control Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan university)Yanshan university

The matching of the pilot valve and multi-way valve is a prerequisite for the pilot control in the engineering machinery. Based on hydraulic pilot control system of a certain bulldozer actuator and the principle of the pilot control system, we analyze the matching relationship between the pilot valve and multi-way valve. The parameters that influence the hydraulic pilot control system are summarized and the simulation model of pilot control system is built according to the actual parameters of components. The matching relationship of the hydraulic pilot control system is researched by experiments and simulation, which will provide theoretical guidance for the design of the pilot valve and multi-way valve that used in the engineering machinery.

关键词： pilot valve multi-way valve matching simulation

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Analyse Aerodynamics of the Rapid Transporter for Medium Body of Aircraft

Analyse Aerodynamics of the Rapid Transporter for Medium Bod...

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第六届工程机械与车辆工程新进展国际学术会议

作者： Kang Shaopeng Zhao Jingyi Li Xilong Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University)

The equipment and transportation safety will be affected greatly by the wind in the process of the large-scale precision equipment transited *** the numerical simulation analysis of the ex

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Coordinated Control and Reliability Evaluation of Hydraulic System Group for Joint Operation of Large Scale Equipment

Coordinated Control and Reliability Evaluation of Hydraulic ...

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第六届工程机械与车辆工程新进展国际学术会议

作者： Wang Zhao Zhao Jingyi Kang Shaopeng Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University)

More and more extra large equipment transport is achieved by means of joint operation of large scale engineering *** of the characteristics of high quality,large bulk,irregular size an

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Compliance of Self-adaption Suspension Group Systems in Self-propelled Transporters

Compliance of Self-adaption Suspension Group Systems in Self...

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第六届工程机械与车辆工程新进展国际学术会议

作者： Zhao Jingyi Cai Wei Kang Shaopeng Liu Bei Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University)

Through the descriptions and effect evaluations of the compliance of self-adaption suspension group systems in selfpropelled transport,a kind of self-adaption suspension group system was improved and

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