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Algorithm Research and Realization of the Turning Control System for Heavy Transportation Vehicle

Chinese Journal of Mechanical Engineering 2012年第3期25卷 530-535页

作者： MI Hanguang YUAN Haiwen wang qiusheng ZHAO Jingpo School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China

The dynamics of turning system which is a nonlinear system normally has great impact on the transportation speed of the vehicle having heavy load and large *** dynamics of turning system depends on control algorithm and its implementation,but the existing control algorithms which having high dynamics in the application of heavy transportation vehicle are complex for realization and high hardware ***,the nonlinear turning system is analyzed for improving its dynamics by researching new efficient control *** models of electromagnetic valve,hydraulic cylinder and turning mechanical part are built individually to get the open-loop model of the turning system following characteristics *** to the model,a new control algorithm for heavy transportation vehicle which combined PID with Bang-Bang control is *** the close-loop model of turning system is obtained under Matlab/Simulink *** comparing the step response of different control algorithms in the same conditions,the new algorithm＇s validity is *** the basis of the analysis results,the algorithm is adopted to implement the turning control system by using CAN field bus and PLC ***,the turning control system has been applied in one type of heavy transportation *** reduces the response time of turning system from seconds level to 250 ms,and the speed of heavy transportation vehicle increases from 5 km/h to 30 km/*** application result shows that the algorithm and turning control system have met all the turning *** new type of turning control algorithm proposed is simple in implementation for fast response of nonlinear and large-scale turning system of heavy transportation vehicle.

关键词： transportation vehicle turning system PID control Bang-Bang control

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Received signal strength indication-based localisation method with unknown path-loss exponent for HVDC electric field measurement

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High Voltage 2017年第4期2卷 261-266页

作者： Xiaolan Gu Yong Cui qiusheng wang Haiwen Yuan Luxing Zhao Guifang Wu School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191People's Republic of China Graduate School of System and Information Engineering University of TsukubaIbaraki 305-8577Japan High Voltage Department China Electrical Power Research InstituteBeijing 100192People's Republic of China

The electric field environment under high-voltage direct current(HVDC)transmission lines is an important design *** the wireless sensor networks for electric field measurement system under the HVDC transmission lines,it is necessary to obtain the electric field distribution with multiple *** accurate localisation of sensing nodes is essential to the analysis of measurement ***,most current techniques are limited to constant measurement environment with fixed and known path-loss ***,the authors report a localisation method based on received signal strength indication with unknown path-loss exponent for the localisation of one-dimensional linear topology wireless networks in the electric field measurement *** optimisation method is utilised to obtain the optimal pass-loss parameter without involving the previous environment ***,simulations are employed to demonstrate the feasibility and the effectiveness of the proposed method by comparing with other methods.

关键词： signal local exponent

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Gold nanorods/tetrahedral DNA composites for chemo-photothermal therapy

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Regenerative Biomaterials 2022年第1期9卷 404-413页

作者： Ziyun He qiusheng wang Nan Zhang Jianqin Yan Li Li Jun Cao Bin He National Engineering Research Center for Biomaterials College of Biomedical EngineeringSichuan UniversityChengdu 610064China Department of Pharmaceutics School of PharmacyQingdao UniversityQingdao 266073China

Combination therapy is extensively developed for cancer treatment in recent years due to its high ***,we constructed a nanocomposite based on gold nanorods(GNRs)and drug-loaded tetrahedral DNA nanostructures(TDN)for chemophotothermal combinational ***-tumor drug doxorubicin(DOX)was loaded via the insertion within GC base pairs of *** aptamer AS1411 was attached to the apex of TDN(ATDN)to target tumor *** DOX-loaded DNA tetrahedron(ATDN-DOX)was compressed by the GNRs coated with PEI(GNRs@ATDN-DOX)to realize the photothermal function and lysosome *** under the illumination of 808nm infrared laser showed high photothermal conversion and stability due to the protection of PEI *** drug-loading capacity of ATDN-DOX was as high as 314 DOX molecules in per *** positive charge of PEI in GNRs@ATDN-DOX nanocomposites was utilized to achieve excellent cell penetration and induce proton sponge effect for lysosomal *** nanocomposites presented HeLa and 4T1 cells targeting and resulted in efficient anticancer activity.

关键词： nanocomposite DNA tetrahedron gold nanorod chemo-photothermal therapy

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Underwater explosion in centrifuge partⅠ:Validation and calibration of scaling laws

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Science China(Technological Sciences) 2017年第11期60卷 1638-1657页

作者： HU Jing CHEN ZuYu ZHANG XueDong WEI YingQi LIANG XiangQian LIANG JianHui MA GuoWei wang qiusheng LONG Yuan China Institute of Water Resources and Hydropower Research Beijing 100048China School of Transportation Science and Engineering Beihang UniversityBeijing 100083China Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of TechnologyBeijing 100124China College of Field Engineering PLA University of Science and TechnologyNanjing 210007China

Centrifuge is a promising tool for underwater explosion(UNDEX) research as both Mach and Froude similitudes could be satisfied with hyper-gravity in models, which would result in similarities in both shock wave and bubble oscillation. Scaling laws for UNDEX in centrifuge have been proposed based on dimensional analysis. Two dimensionless numbers, i.e.,π_3 and π_4, are used to characterize shock wave and bubble oscillation, respectively. To validate scaling laws, 17 UNDEX tests are designed by varying accelerations or explosive weights and positions in centrifuge. The tests are classified into different groups to validate scaling laws as well as calibrate coefficients in empirical formulae for both shock wave and bubble oscillation. The results show that changes of gravity acceleration or hydrodynamic pressure almost has no influence on shock wave peak pressure and time constant as long as π3 is constant. The dimensionless bubble period and maximum radius agreed with each other when π4 is constant. Based on the research, an example is exhibited to suggest method for the computation of initial loading conditions for a submerged obstacle subjected to UNDEX.

关键词： underwater explosion (UNDEX) centrifuge scaling laws shock wave bubble oscillation

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Underwater explosion in centrifuge Part Ⅱ：Dynamic responses of defensive steel plate

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Science China(Technological Sciences) 2017年第12期60卷 1941-1957页

作者： LONG Yuan ZHOU HongYuan LIANG XiangQian SONG Ge CHEN ZuYu HU Jing wang qiusheng ZHANG XueDong LIANG JianHui HUANG ZhiJie College of Field Engineering PLA University of Science and Technology Nanjing 210007 China Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of Technology Beijing 100124 China China Institute of Water Resources and Hydropower Research Beijing 100048 China School of Transportation Science and Engineering Beihang University Beijing 10083 China

Part II of this paper is focused on the dynamic response of a steel plate of the centrifuge model which is fixed on the container. This plate is 5 cm thick, allowing for non-destructive elastic response to all the 19 blasts. Three accelerators and 10 sets of strain gauges are installed on the plate to monitor the acceleration and deformation histories induced by shock waves and bubble *** article presents the characteristic values measured for shock waves and bubble oscillations response. The detailed information can be found in a database available on the web. In order to obtain the correct acceleration time history, the cut-off frequency of low-pass filtering by Fourier transformation was applied. The results indicated that the acceleration and strain induced by shock wave was nearly unaffected by the increasing gravity, while the effect of gravity has remarkable influence on those induced by bubble oscillation. A preliminary study of comparing the measured dynamic response with numerical simulations has been carried out using ANSYS LS-DYNA. The results captured the dynamic response in terms of characteristics and trends, but deviated in magnitude due the theoretical and technological limitations involved in both the physical and numerical models. It certainly deserves further studies.

关键词： underwater explosion shock wave bubble oscillation strain acceleration LS-DYNA

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《牧羊人恋歌》的续写、引用和模仿

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外国文学 2007年第2期 80-86页

作者：王秋生北京外国语大学英语学院北京100089

英国剧作家兼诗人马洛的《牧羊人恋歌》被公认是英国文学史上最美的抒情诗之一。该诗问世后引起了众多诗人对之进行续写、引用和模仿。16世纪,巴恩菲尔德的《深情的牧羊人》和莎士比亚的《温莎的风流娘儿们》;17世纪,雷利的《美女答牧... 详细信息

英国剧作家兼诗人马洛的《牧羊人恋歌》被公认是英国文学史上最美的抒情诗之一。该诗问世后引起了众多诗人对之进行续写、引用和模仿。16世纪,巴恩菲尔德的《深情的牧羊人》和莎士比亚的《温莎的风流娘儿们》;17世纪,雷利的《美女答牧羊人》、布雷顿的《多情的牧羊人》、多恩的《诱饵》、赫里克的《致菲利斯,爱他并和他同居》和沃尔顿的《娴熟的垂钓者》;20世纪,刘易斯的《歌两首》和纳什的《共和党或民主党统治下的爱》,这些都是精彩的范例;它们在不同程度上与原作之间构成了复杂而丰富的“互文性”,而探讨它们之间的互文关系对理解和欣赏这些诗歌大有裨益。

关键词：《牧羊人恋歌》续写引用模仿互文性误读

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Establishment and Analysis of the Fault Tree for the Oil Transfer Pump System in CNPC Work Zone

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International Journal of Plant Engineering and Management 2014年第3期19卷 150-172页

作者： HUANG Hui wang qiusheng GAO Jie YANG Jiaqi XU Xiaodong School of Management Northwestern Polytechnical University Huaxin Consulting Co. Ltd

The reliability of the equipment is very important for the large petrochemical industry, especially for oil pump as the core component of driving equipment. In order to reduce the loss of the enterprise brought by equipment failure, it is need to find those reasons which may lead to equipment failure and take some preventive measures as early as possible. This article analyzes the failure of the oil transfer pump system in CNPC work zone systematically, qualitatively and quantitatively, using the fault tree analysis method. Then 105 groups of minimal cut sets are found, and the probability of system failure after a certain time operation is calculated by using Weibull distribution. Combined with specific requirements of reliability, the work zone may make a scientific decision of plant maintenance cycle according to the conclusion.

关键词： fault tree reliability Weibull distribution plant maintain and management

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数字双频陷波滤波器的优化级联设计方法

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仪器仪表学报 2012年第12期33卷 2641-2646页

作者：王秋生袁海文北京航空航天大学自动化科学与电气工程学院北京100191

数字双频陷波滤波器主要用于消除或抑制数字信号中的2个频率分量。首先推导出增益可控单频陷波滤波器的设计公式;然后采用特定的幅度响应控制策略,通过级联2个单频陷波滤波器,实现了数字双频陷波滤波器的优化设计;最后对所提设计方法的... 详细信息

数字双频陷波滤波器主要用于消除或抑制数字信号中的2个频率分量。首先推导出增益可控单频陷波滤波器的设计公式;然后采用特定的幅度响应控制策略,通过级联2个单频陷波滤波器,实现了数字双频陷波滤波器的优化设计;最后对所提设计方法的有效性和实用性进行了一系列的仿真实验验证。

关键词：数字滤波器设计数字陷波滤波器双频陷波滤波器无限长单位脉冲响应

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固体氧化物燃料电池甲烷直接内重整的数值模拟

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机械科学与技术 2010年第3期29卷 351-357页

作者：王求生王乘华中科技大学土木工程与力学学院武汉430074

基于固体氧化物燃料电池(solid oxide fuel cell,SOFC)的工作原理,对其能量转换过程中的热质传输和电化学反应现象建立数学模型。研究了碳氢化合物气体作为SOFC燃料气条件下重整反应和水气交换反应对SOFC性能参数的影响。采用FLUENT与... 详细信息

基于固体氧化物燃料电池(solid oxide fuel cell,SOFC)的工作原理,对其能量转换过程中的热质传输和电化学反应现象建立数学模型。研究了碳氢化合物气体作为SOFC燃料气条件下重整反应和水气交换反应对SOFC性能参数的影响。采用FLUENT与外部子程序结合的方法,对数学模型进行求解。对比分析了不同工作电压条件下电池温度、极化、电流密度等电池性能参数。结果表明:甲烷重整反应生成的一氧化碳也大量参与电化学反应,在SOFC的工作电压为0.682 V一氧化碳氧化产生的电流为总电流的18.5%;阴极极化是电池极化损失的主要部分;SOFC的工作电压区间为0.652 V至0.702 V时,总电流密度、功率密度、燃料利用率、发电效率和三合一电极(posi-tive/electrolyte/negative,PEN)的温度梯度随着工作电压的增加而减小。

关键词：固体氧化物燃料电池数学模型重整反应电池性能参数

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Changes of norepinephrine and tumor necrosis factor in submandibular gland of rats with sympathetic nerve injury and the protective effect of 17 beta-estradiol

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Neural Regeneration Research 2006年第4期1卷 325-327页

作者： Yagao Feng Suya Deng Zhenqi Liu Min Hu Houjun Yan qiusheng wang Department of Hand Surgery the 252 Hospital of ChinesePLA Baoding 071000 HebeiProvince China

BACKGROUND： Recent researches have indicated that estrogen has extensive neuroprotective effects. So some studies designed ovariectomized animal models and administrated with estrogen, so as to verify its neuroprotective effects. OBJECTIVE： To observe the effect of 17 beta-estradiol on the content of norepinephrine （NE） and level of tumor necrosis factor （TNF） in submandibular glands of rats with sympathetic nerve injury, and analyze the dose-dependence and pathway of action. DESIGN： A randomized control animal study SETTINGS： Department of Hand Surgery, the 252 Hospital of Chinese PLA; Department of Hand Surgery Union Hospital affiliated to Tongji Medical College, Huazhong University of Science and Technology. MATERIALS： Fifty healthy female Wistar rats were randomly divided into 5 groups with 10 rats in each group： sham-operated group, ovariectomy＋6-OHDA＋saline group, ovariectomy＋6-OHDA＋17β-estradiol 50, 200 and 500 μg/kg groups. METHODS： The experiments were carried out in Tongji Medical College, Huazhong University of Science and Technology between October 2005 and March 2006. Bilateral ovaries were only exposed but not resected for the rats in the sham-operated group, but bilateral ovaries were resected in all the other groups. In the ovariectomy＋6-OHDA＋176-estradiol 50, 200 and 500 μg/kg groups, the rats were administrated with intraperitoneal injection of 6-OHDA （8 mg/kg）, and then immediately given 176-estradiol of corresponding dosages respectively, once a day for 10 days continuously. Rats in the sham-operated group and ovariectomy＋6-OHDA＋saline group were administrated with saline of the same volume. After administration, 5 rats in each group were killed to determine the NE contents in bilateral submandibular glands with high performance liquid chromatography-electrochemical detector （HPLC-ECD）, and the other 5 rats were used to determine the TNF levels in submandibular glands with enzyme-linked immunosorbant assay. MAIN OUTCOME MEASURES： The

关键词： Changes of norepinephrine and tumor necrosis factor in submandibular gland of rats with sympathetic nerve injury and the protective effect of 17 beta-estradiol NGF

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