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DYNAMIC RESPONSE ANALYSIS OF DDMS PLATFORM SUBJECTED TO ACTIONS OF WAVE GROUPS AND CURRENT FOURCES

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Journal of Hydrodynamics 2011年第6期23卷 697-708页

作者： SUN Zhao-chen wang xing-gang LIANG shu-xiu LIU shu-Xue LIU Si State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024China

Coupled dynamic analysis of the Deep Draft Multi-Spar （DDMS） platform and the mooring system under the action of waves and current is carried out in the time domain. Using a geometrically nonlinear finite element method, the mooring-line dynamics is simulated based on the total Lagrangian formulation. Wave groups are obtained by the JONSWAP spectrum and an empirical wave envelope spectrum involving two envelope-based factors Group Height Factor （GFH） and Group Length Factor （GLF）. The results show that the wave groups have a significant effect on the motion responses of the platform and the mooring line tensions.

关键词： Deep Draft Multi Spar (DDMS) platform dynamic response wave groups current fources

灵活就业人员劳动权益保障研究——基于中国家庭追踪调查数据

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生产力研究 2024年第10期 28-32页

作者：于艳芳刘迎春王淑星河北大学管理学院河北保定071002 保定市社会保险事业服务中心河北保定071002

基于中国家庭追踪调查(CFPS)最新数据,筛选出1 008份灵活就业人员样本,统计灵活就业人员人口特征,评价灵活就业人员劳动权益保障满意度,发现灵活就业人员的劳动权益保障存在劳动收入水平较低、劳动时间较长、劳动合同签订率较低、社会... 详细信息

基于中国家庭追踪调查(CFPS)最新数据,筛选出1 008份灵活就业人员样本,统计灵活就业人员人口特征,评价灵活就业人员劳动权益保障满意度,发现灵活就业人员的劳动权益保障存在劳动收入水平较低、劳动时间较长、劳动合同签订率较低、社会保险参保率较低和劳动福利缺乏等问题。在分析法律、政府、企业、灵活就业人员本身原因的基础上,文章提出提高相关法律适用性,健全政府制度保护网,规范企业用工行为,以及提升灵活就业人员就业能力等针对性对策。

关键词：灵活就业劳动权益保障中国家庭追踪调查数据

Effect of Shock Absorbers’ Deformation on RLG’s Bias Temperature Modeling 26th

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Effect of Shock Absorbers’ Deformation on RLG’s Bias Tempe...

Shaft Orientation Error Compensation of Single-axis Rotation INS in Ship Deformation Measurement System 26th

第26届中国控制与决策会议

作者： TAN Wen-feng HU Chun-sheng wang xing-shu College of Optoelectronic Science and Engineering National University of Defense Technology

ISBN: (纸本)9781479937097

The deformation of shock absorbers has a great impact on gyro bias output during the system-level temperature modeling of gyro bias. In this paper, two ways of shock absorbers’ effect on gyro bias output are proposed: change of the Earth’s rotation component and slow movement of IMU apperceived by gyro. This paper analyzes the change of the Earth’s rotation component caused by the change of gyro’s sensitive axis. The effect of IMU’s slow movement is estimated. A method on how to place the gyro to weaken the impact of shock absorbers’ deformation is proposed. The effect of shock absorbers’ deformation on bias’ temperature model and accuracy of temperature compensation is analyzed through simulation.

关键词： shock absorbers bias temperature modeling

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Shaft Orientation Error Compensation of Single-axis Rotation...

重离子储存环CSRe上类钠Kr^(25+)离子的双电子复合精密谱学实验研究

第26届中国控制与决策会议

作者： LI You wang xing-shu HUANG Zong-sheng National University of Defense Technology

ISBN: (纸本)9781479937097

In the ship deformation measurement system, which is based on the single-axis rotating modulation inertial navigation system, the shaft orientation error is one of the important factors that affect the accuracy of rotation demodulation process and ship deformation measurement. A shaft orientation error compensation method based on quaternion was proposed in this article. The coordinates of the rotation axis of the turntable was calibrated in the reference frame of the inertial measurement unit, and then converted to quaternion together with the output of the gyros and the rotation angle of the shaft, thus calculate the angular velocity of the ship in quaternion form. Simulation results show that the ship deformation measurement accuracy can be significantly improved after error compensation.

关键词： Single axis rotation Laser gyro Ship deformation measurement Quaternion Shaft error compensation

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物理学报 2024年第12期73卷 147-158页

作者：邵林黄忠魁汶伟强汪书兴黄厚科马万路刘畅汪寒冰陈冬阳刘鑫周晓鹏赵冬梅张少锋朱林繁马新文华南师范大学物理学院量子调控工程与材料重点实验室广州510006 中国科学院近代物理研究所兰州730000 中国科学技术大学近代物理系合肥230026

高电荷态离子的双电子复合精密谱学实验研究,不仅对天体等离子体和聚变等离子体的研究具有重要意义,而且可以作为一种新的精密谱学工具,用来检验强场量子电动力学效应、测量同位素移动及提取原子核电荷半径等.在兰州重离子储存环CSRe上... 详细信息

高电荷态离子的双电子复合精密谱学实验研究,不仅对天体等离子体和聚变等离子体的研究具有重要意义,而且可以作为一种新的精密谱学工具,用来检验强场量子电动力学效应、测量同位素移动及提取原子核电荷半径等.在兰州重离子储存环CSRe上,安装了专门用于电子-离子复合精密谱学实验的电子束能量调制系统,质心系下电子-离子碰撞能量的调制范围达到0—1 keV.在CSRe电子冷却器下游安装了自主研制的塑料闪烁体探测器和多丝正比探测器,用于探测复合离子.在此基础上,使用Kr^(25+)离子在CSRe上进行了首次双电子复合测试实验,实验测量了质心系能量0—70 eV的双电子复合速率系数.为了更好地理解实验测量结果,利用FAC(flexible atomic code)程序计算了Kr^(25+)离子的双电子复合速率系数,并与实验做了细致对比,整体符合很好,而且发现3s→41(△n=1)的共振跃迁对实验谱线有很大的贡献.实验结果表明,CSRe双电子复合实验平台具有非常好的稳定性和可重复性,能够为下一步开展更高电荷态离子的双电子复合精密谱学实验、检验强场量子电动力学效应以及原子核性质精密测量等前沿实验提供支持.

关键词：双电子复合储存环CSRe 电子冷却器多丝正比探测器

The Complete Classification of Graphs whose Second Largest Eigenvalue of the Eccentricity Matrix is Less Than 1

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Acta Mathematica Sinica,English Series 2024年第7期40卷 1741-1766页

作者： Jian Feng wang xing Yu LEI shu Chao LI Zoran STANIC School of Mathematics and Statistics Shandong University of TechnologyZibo255049P.R.China Faculty of Mathematics and Statistics Central China Normal UniversityWuhan430079P.R.China Faculty of Mathematics University of BelgradeStudentski trg 1611000BelgradeSerbia

The eccentricity matrix of a graph is obtained from the distance matrix by keeping the entries that are largest in their row or column,and replacing the remaining entries by *** matrix can be interpreted as an opposite to the adjacency matrix,which is on the contrary obtained from the distance matrix by keeping only the entries equal to *** the paper,we determine graphs having the second largest eigenvalue of eccentricity matrix less than 1.

关键词： Eccentricity matrix eigenvalue diameter principal submatrix forbidden subgraph

Optimal design of APD biasing circuit

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Optoelectronics Letters 2007年第3期3卷 237-240页

作者： SUN Chun-sheng QIN Shi-qiao wang xing-shu ZHU Dong-hua College of Optoelectronic Science and Technology National University of Defense Technology Changsha 410073 China Department of Weaponry Engineering Naval University of Engineering Wuhan 430033 China

This paper proposes a control method for avalanche photodiode(APD) reverse bias with temperature compensation and load resistance compensation. The influence of background light and load resistance on APD detection circuit is analyzed in detail. A theoretical model of temperature compensation and load resistance compensation is established,which is used for APD biasing circuit designing. It is predicted that this control method is especially suitable for LD laser range finder used on vehicles. Experimental results confirm that the design proposed in this paper can considerablely improve the performance of range finder.

关键词：雪崩二极管偏流电路优化设计温度补偿负载电阻补偿

Reinforcement Learning-Based Dynamic Order Recommendation for On-Demand Food Delivery

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Tsinghua Science and Technology 2024年第2期29卷 356-367页

作者： xing wang Ling wang Chenxin Dong Hao Ren Ke xing Department of Automation Tsinghua UniversityBeijing 100080China School of Mechanical and Automotive Engineering Qingdao Hengxing University of Science and TechnologyQingdao 266100China Meituan Beijing 100015China

On-demand food delivery(OFD)is gaining more and more popularity in modern *** a kernel order assignment manner in OFD scenario,order recommendation directly influences the delivery efficiency of the platform and the delivery experience of *** paper addresses the dynamism of the order recommendation problem and proposes a reinforcement learning solution *** actor-critic network based on long short term memory(LSTM)unit is designed to deal with the order-grabbing conflict between different ***,three rider sequencing rules are accordingly proposed to match different time steps of the LSTM unit with different *** test the performance of the proposed method,extensive experiments are conducted based on real data from Meituan delivery *** results demonstrate that the proposed reinforcement learning based order recommendation method can significantly increase the number of grabbed orders and reduce the number of order-grabbing conflicts,resulting in better delivery efficiency and experience for the platform and riders.

关键词： on-demand food delivery order recommendation reinforcement learning actor-critic network long short term memory

Enhancing thermoelectric performance of p-type SnTe through manipulating energy band structures and decreasing electronic thermal conductivity

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Rare Metals 2024年第7期43卷 3232-3241页

作者： Xin Qian Hao-Ran Guo Jia-Xin Lyu Bang-Fu Ding xing-Yuan San Xiao Zhang Jiang-Long wang shu-Fang wang Hebei Key Lab of Optic-Electronic Information and Materials College of Physics Science and TechnologyHebei UniversityBaoding 071002China College of Electron and Information Engineering Hebei UniversityBaoding 071002China Research Institute for Frontier Science Beihang UniversityBeijing100191China

SnTe has received considerable attention as an environmentally friendly alternative to the representative thermoelectric material of ***,excessive hole carrier concentration in SnTe results in an extremely low Seebeck coefficient and high thermal conductivity,which makes it exhibit relatively inferior thermoelectric *** this work,the thermoelectric performance of p-type SnTe is enhanced through regulating its energy band structures and reducing its electronic thermal conductivity by combining Bi doping with CdSe ***,the carrier concentration of SnTe is successfully suppressed via Bi doping,which significantly decreases the electronic thermal ***,the convergence and flattening of the valence bands by alloying CdSe effectively improves the effective mass of SnTe while restraining its carrier ***,a maximum figure of merit(ZT) of~ 0.87 at 823 K and an average ZT of~ 0.51 at 300-823 K have been achieved in Sn_(0.96)Bi_(0.04)Te-5%*** results indicate that decreasing the electronic thermal conductivity is an effective means of improving the performance of thermoelectric materials with a high carrier concentration.

关键词： Thermoelectric materials SnTe Energy band structure Electronic thermal conductivity ZT value