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Journal of mechanics engineering and Automation 2014年第4期4卷 253-260页

作者： Saeed Foroudastan Brigette Prater Thompson College of Basic and Applied sciences Middle Tennessee State University Murfreesboro 3 7132 United States Masters of Science in Professional Science Middle Tennessee State University Murfreesboro 37132 United States

The EVP （experimental vehicles program） was created in 2004 as an umbrella program for five different undergraduate experimental vehicle design teams. These projects consist of the Solar Vehicle, Moonbuggy, Baja SAE （sina app engine）, Formula SAE and Solar Boat. The goal of the EVP is to foster undergraduate student development through hands-on construction of experimental vehicles with the guidance of faculty mentors and partnerships with both national and international industry leaders. Each EVP project performs a vital function in the professional development of students. The projects provide a forgiving environment in which students can test their classroom knowledge in a real-world setting and learn important skills such as leadership, effective communication and working as a team member. Furthermore, the students in the EVP develop highly versatile and qualified skill sets that will allow them to fill various positions within the workplace. In the past, 90% of EVP graduates have been able to obtain highly regarded national and international positions upon graduation due to their real-world experience gained throughout their involvement in the EVP. Each year the EVP sponsors up to 60 interdisciplinary students that come together in peer-led teams to combine and expand upon their classroom knowledge in building innovative vehicles. The successes of the MTSU （Middle Tennessee State University） EVP have been recognized by becoming the national model for hands-on engineering education; helping engineering students take classroom knowledge and apply it to real-world situations. Students work to design, construct, and test novel vehicle designs for participation in national and international competitions. Due to the competitive nature of each of the events, students must use cutting edge technology and design methods in order to create the best entries possible. Often times, this means creating partnerships with industry leaders who help mentor the students from the

关键词： Innovative vehicles professional development industry partnerships.

Numerical Study of the Effect of Thermosiphon on the Vertical Dispersion of Pollutants

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Journal of mechanics engineering and Automation 2016年第6期6卷 295-300页

作者： Zeinebou Yahya Cheikh Mbow Department of Physics Faculty of Sciences and Arts Qassim University Buraidah 51452 Kingdom of Saudi Arabia Department of Physics Faculty of Science and Technology Cheikh Anta Diop of Dakar University Dakar 61641 Sengal

The dispersion of pollutants in urban environments is a major problem. Because of this fact our study comes to propose prevention and security system against the dispersion of releases and fumes from industrial smokestacks. The system is modeled by a plume-thermosiphon interaction flow resulting from a vertical cylinder open at both ends with a generating source of the plume centered at the opening of the cylinder. The cylindrical wall heats under the effect of the thermal radiation emitted by the generator source, which causes a flow of thermosiphon around the flow of the thermal plume. In order to determine the radiosity of radiation leaving the wall we have been used the Simpson quadrature and the Gaussian elimination method with a dominant pivot. Numerical simulations have been executed for different positions of the thermosiphon compared to the plume source, and for a number of Rayleigh fixed Ra = 10＋7, and a radius of the hot source corresponds to R＊ = 0.46. The results oftbe numerical model that we have been developed, help first identify the behavior of pollutants from the dynamic and thermal point of view and then explore the different locations of the thermosiphon compared to the source of the plume which causes a major influence on the dispersion of pollutants.

关键词： Interaction numerical modelling pollutants thermosiphon.

Multi-Objective Optimization of Mechanical Running Conditions of Large Scale Statically Indeterminate Rotary Kiln

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工程科学（英文版） 2006年第1期4卷 40-44页

作者： Hu Xiaoping Xiao Yougang Wang Guangbin School of Mechanical and Electrical engineering Hunan Science and Technology University Xiangtan 411201 Key Lab of Railway and Traffic Safety Central South University Changsha 410075

Combined with the second rotary kiln of Alumina Factory in Great Wall Aluminum Company, the mechanics characteristics of statically indeterminate large-scale rotary kiln with variable cross-sections is analyzed. In order to adjusting the running axis of rotary kiln, taking the force equilibrium of the rollers and the minimum of relative axis deflection as the optimization goal, the multi-objective optimization model of mechanical running conditions of kiln rotary is set up. The mechanical running conditions of the second rotary kiln after multi-objective optimization adjustment are compared with those before adjustment and after routine adjustment. It shows that multi-objective optimization adjustment can make axis as direct as possible and can distribute kiln loads equally.

关键词：超静定回转炉多目标最优化运行情况冶金炉

Analysis on distribution law of the abutment pressure of the integrated coal beside the road-in packing for gob-side entry retaining in fully-mechanized caving face

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engineering sciences 2009年第3期7卷 23-27页

作者： Zhu Chuanqu Liu Ze Wang Weijun Zhang Daobing School of Energy and Safety engineering Hunan University of Science and Technology XiangtanHunan 411201 China School of Building Central South University Changsha 410075 China

The three-dimensional damage constitutive relationship of coal is established and distribution law of the abutment pressure of the integrated coal beside the road-in packing for gob-side entry retaining in fully-mechanized caving face under the effect of given deformation of the main roof is analyzed by the damage mechanics theory. And the relationship between distribution of the abutment pressure and thickness of coal seam is explored. The presented result is of great theoretical significance and practical value to the study on stability control of the surrounding rock of road-in packing for gob-side entry retaining in fully-mechanized caving face.

关键词： road-in packing for gob-side entry retaining in fully-mechanized caving face integrated coal beside the roadway abutment pressure damage mechanics

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海洋沉积土动剪切模量与阻尼比的试验研究

岩土力学 2015年第S1期36卷 459-464页

作者：尹松张先伟孔令伟 Hossain Md Sayem 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室湖北武汉430071 Department of Geological sciences Jahangirnagar University

动剪切模量和阻尼比是工程场地地震安全性评价及地基动力反应分析的重要动力学参数。为评价某海域海洋土的动力学特性,对10.3~84.2 m深度范围内的海底淤泥质粉质黏土、粉砂及细砂开展共振柱试验。利用双对数模型建立了最大动剪切模量随... 详细信息

动剪切模量和阻尼比是工程场地地震安全性评价及地基动力反应分析的重要动力学参数。为评价某海域海洋土的动力学特性,对10.3~84.2 m深度范围内的海底淤泥质粉质黏土、粉砂及细砂开展共振柱试验。利用双对数模型建立了最大动剪切模量随上覆压力的递增关系。研究发现,现有规范的剪切模量比与阻尼比的推荐取值并不适用于海洋沉积土,即使考虑借鉴以往研究成果也必须将其限制在一定的应变范围,并应考虑土体的天然应力状态取值。利用马丁-达维登科夫(Martin-Davidenkov)模型及阻尼比与剪应变的经验关系建立了剪切模量比和阻尼比随剪应变的变化规律,并由此提出了适用于海洋沉积土的5×10-6~10-3应变范围内剪切模量比及阻尼比的推荐值。研究成果可为海洋工程场地的设计、施工及抗震分析提供技术参考依据。

关键词：海洋沉积土共振柱试验动剪切模量阻尼比

Computed tomography-based finite element analysis to assess fracture risk and osteoporosis treatment

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World Journal of Experimental Medicine 2015年第3期5卷 182-187页

作者： Kazuhiro Imai Department of Life sciences Graduate School of Arts and Sciences the University of Tokyo

Finite element analysis(FEA) is a computer technique of structural stress analysis and developed in engineering mechanics. FEA has developed to investigate structural behavior of human bones over the past 40 years. When the faster computers have acquired, better FEA, using 3-dimensional computed tomography(CT) has been developed. This CT-based finite element analysis(CT/FEA) has provided clinicians with useful data. In this review, the mechanism of CT/FEA, validation studies of CT/FEA to evaluate accuracy and reliability in human bones, and clinical application studies to assess fracture risk and effects of osteoporosis medication are overviewed.

关键词： Finite element analysis Bone mechanics Hip fracture Osteoporosis Vertebral fracture Fracture risk

Constraining self-interacting dark matter with the full dataset of PandaX-II

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Science China(Physics,mechanics & Astronomy) 2021年第11期64卷 2-7页

作者： Jijun Yang Abdusalam Abdukerim Wei Chen Xun Chen Yunhua Chen Chen Cheng Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Mengting Fu Lisheng Geng Karl Giboni Linhui Gu Xuyuan Guo Ke Han Changda He Shengming He Di Huang Yan Huang Ran Huo Yanlin Huang Zhou Huang Xiangdong Ji Yonglin Ju Shuaijie Li Qing Lin Huaxuan Liu Jianglai Liu Xiaoying Lu Wenbo Ma Yugang Ma Yajun Mao Yue Meng Nasir Shaheed Kaixiang Ni Jinhua Ning Xuyang Ning Xiangxiang Ren Changsong Shang Guofang Shen Lin Si Andi Tan Anqing Wang Hongwei Wang Meng Wang QiuHong Wang Siguang Wang Wei Wang Xiuli Wang Zhou Wang Mengmeng Wu Shiyong Wu Weihao Wu Jingkai Xia Mengjiao Xiao Xiang Xiao Pengwei Xie Binbin Yan Yong Yang Chunxu Yu Hai-Bo Yu Jumin Yuan Ying Yuan Xinning Zeng Dan Zhang Tao Zhang Li Zhao Qibin Zheng Jifang Zhou Ning Zhou Xiaopeng Zhou School of Physics and Astronomy Shanghai Jiao Tong UniversityMOE Key Laboratory for Particle Astrophysics and CosmologyShanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China Shanghai Jiao Tong University Sichuan Research Institude Chengdu 610213China Yalong River Hydropower Development Company Ltd.Chengdu 610051China School of Physics Sun Yat-sen UniversityGaungzhou 510275China Tsung-Dao Lee Institute Shanghai 200240China School of Physics Nankai UniversityTianjin 300071China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Physics Peking UniversityBeijing 100871China School of Physics Beihang UniversityBeijing 100191China International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China Shandong Institute of Advanced Technology Jinan 250103China School of Medical Instrument and Food engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Mechanical engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong UniversityJinan 250100China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Department of Physics and Astronomy University of CaliforniaRiversideCalifornia 92507USA Center of High Energy Physics Peking UniversityBeijing 100871China

Self-interacting dark matter(SIDM)is a leading candidate proposed to solve discrepancies between predictions of the prevailing cold dark matter theory and observations of *** SIDM models predict the existence of a light force carrier that mediates strong dark matter *** the mediator couples to the standard model particles,it could produce characteristic signals in dark matter direct detection *** report searches for signals of SIDM models with a light mediator using the full dataset of the PandaX-II experiment,basing on a total exposure of 132 *** significant excess over background is found,and our likelihood analysis leads to a strong upper limit on the dark matter-nucleon coupling *** further combine the PandaX-II constraints and those from observations of the light element abundances in the early universe,and show that direct detection and cosmological probes can provide complementary constraints on dark matter models with a light mediator.

关键词： dark matter direct detection self-interacting dark matter

Deformation characteristics and reinforcement technology for entry subjected to mining-induced stresses

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Journal of Rock mechanics and Geotechnical engineering 2011年第3期3卷 207-219页

作者： Hongpu Kang Yongzheng Wu Fuqiang Gao Coal Mining and Designing Branch China Coal Research Institute Beijing 100013 China Department of Earth sciences Simon Fraser University Burnaby V5A 1S6 Canada

The entry at Zhangcun coal mine in Lu＇an coal mining area in Shanxi Province suffered from severe mining-induced stresses with the heading face driven oppositely to an adjacent working face. In this paper, the characteristics of deformation and failure of the entry were investigated in terms of the tempo-spatial relations between heading and working faces through field study and numerical modeling. The three-dimensional （3D） finite difference models were built to investigate stresses, displacements and damages in the surrounding rocks of the entry and the working face. The field study includes selection of reinforcing methods and materials, design parameters, and determination of cable prestress. The monitoring data of entry deformation and stress along the cables during every stage were presented. The state of the reinforced entry was evaluated based on the monitoring data. The results demonstrate that before the heading face of the entry crosses the adjacent working face, the influence of advanced abutment pressure caused by adjacent working face upon the entry is not significant. After they cross each other, however, the lateral abutment pressure will have an evident impact on the entry. The displacement rate of the entry will be greatly increased and reaches a certain value within a certain distance between the heading face and the working face. Then, it will increase again with the presence of secondary mining-induced pressure on the entry when the present working face advances. The fully-grouted cable with short length, high strength and high prestress is an effective way to reinforce the entry suffering from severe mining-induced stresses, which greatly reduces the displacement and failure possibility of the entry. Finally, the principles and recommendations for reinforcing design of entries suffering from severe mining-induced stresses were proposed according to field study, numerical modeling and experiences from other coal mines. Problems encountered in fi

关键词： mining engineering coal mine entry severe mining-induced stress stress distribution field study reinforcing principle

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Preface

Journal of Computer Science & Technology 2011年第5期26卷 751-753页

作者： Xue-Qi Cheng Wei-Song Shi Tao Zhou Institute of Computing Technology Chinese Academy of Sciences China Department of Computer Science Wayne State University USA School of Computer Science and engineering University of Electronic Science and Technology China

In the past few years, we have witnessed rapid proliferation of online social network services, such as Facebook, Twitter, and ***, which greatly facilitate the collaboration, sharing, and other kinds of interactions among individuals. The term ＇social media＇ has thus been coined to embrace all those new collaborative services or applications and also to indicate a new ＂social＂ approach to generating and distributing Web contents. The everincreasing social network services produce large-scale social data for analyzing user behaviors, and then improving existing services. On the other hand, they also bring forth more severe information overload and require more flexible and robust computing platforms or service paradigms.

关键词： network services social collaboration interactions information analyzing flexible approach sharing robust new media hand data Web