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Design of a 400 N and 12 mm Mechanical Air Gap High Temperature Superconducting Linear Synchronous Motor

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稀有金属材料与工程 2011年第S3期40卷 319-321页

作者： Yen Fei1,2,3. Li Jing1,2,3. Zheng Shijun1,2,3. Jiang Donghui1,2,3. Liu Lu1,2,3. Liu Wei1,2,3. Ma Guangtong1,2,3. Wang Jiasu1,3. Wang Suyu1,3.1 Applied Superconductivity laboratory, Southwest Jiaotong University, chengdu 61003., china.2 State Key laboratory of Traction Power, Southwest Jiaotong University, chengdu 61003., china.3.national laboratory for Rail Transit, chengdu 61003., china SW Jiaotong Univ Appl Superconduct Lab Chengdu 610031 Peoples R China SW Jiaotong Univ State Key Lab Tract Power Chengdu 610031 Peoples R China Natl Lab Rail Transit Chengdu 610031 Peoples R China

The static thrust output on a superconducting coated conductor coil at different excitation and alternating current suspended above a three phase alternating current long-stator comprised of copper coils is presented. Excitation current up to 45 A was applied through the superconducting coil acting as the excitation system of the superconducting linear synchronous motor (SLSM), alternating current up to 9 A was applied to the armature and magnetic air gaps of 10 and 15 mm were investigated for four different cases; coreless, with an iron core or yoke and both a core and yoke. By scaling up and converting the studied superconducting single pancake racetrack coil into a double pancake coil and connecting four of such coils in series, an SLSM prototype capable of generating 400 N of thrust output and 1 kW of power output with a 12 mm mechanical air gap operating at 77 K is proposed.

关键词： high temperature superconductivity linear synchronous motor long stator motor superconducting coil force measurements

An efficient quantum secret sharing protocol with orthogonal product states

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Science china.Physics,Mechanics & Astronomy) 2007年第3期50卷 331-338页

作者： YANG YuGuang1,2, WEN QiaoYan3.& ZHU FuChen4 1 School of Computer, Beijing University of Technology, Beijing 100022, china.2 State Key laboratory of Information Security, Graduate University of Chinese Academy of Sciences, Beijing 100022, china.3.School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, china.4 national Key laboratory for modern Communications, chengdu 610041, china School of Computer Beijing University of Technology Beijing China State Key laboratory of Information Security Graduate University of Chinese Academy of Sciences Beijing China School of Science Beijing University of Posts and Telecommunications Beijing China national Key laboratory for modern Communications Chengdu China

An efficient quantum secret sharing protocol with orthogonal product states in the 3.3.Hilbert space is presented. The particles in the orthogonal product states form two particle sequences. One sequence is sent to Bob and the other is sent to Charlie after rearranging the particle orders. With the help of Alice, Bob and Charlie make the corresponding local measurement to obtain the information of the or- thogonal product states prepared. This protocol has many distinct features such as great capacity and high efficiency.

关键词： quantum secret sharing orthogonal product state orthogonal measurement

Experimental Analysis of Shear Strength of Undisturbed Soil in Leucaena Forest in Jiangjia Ravine,Yunnan,china

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Journal of Mountain Science 2010年第4期7卷 386-395页

作者： JIAO Zhen Key laboratory of Mountain Hazards and earth surfaceprocesses ChineseAcademy of Sciences Chengdu 610041 China Graduate University of ChineseAcademy of Sciences Beijing I ooo49 China Institute of Mountain Hazards and Environment Chinese Academy of Science Chengdu 61oo41 China

Five leucaena trees of similar age were chosen in Jiangjia Ravine of Dongchuan,Yunnan Province,china.near which the soil samples were collected by digging profiles 2m in depth and 1m in *** each section,soil samples at different depths were taken for direct shear experiments to determine the root amount and mechanical *** is found that the cohesion and internal friction angle of the undisturbed soil are related to the root amount,depth,clay content and breccias *** correlates negatively with root content,a finding that differs from that of other *** addition,internal friction angle correlates positively with all these factors.

关键词： Jiangjia Ravine Leucaena Undisturbedsoil Shear strength Impact factors

Subsidence control and farmland conservation by solid backfilling mining technology

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中国有色金属学会会刊：英文版 2011年第S3期21卷 665-669页

作者： GUO Guang-li1, 2, FENG Wen-kai3. ZHA Jian-feng1, 2, 3. LIU Yuan-xu1, 2, WANG Qiang1, 2 1. Key laboratory for Land Environment and Disaster Monitoring of the State Bureau of Surveying and Mapping, china.University of Mining and Technology, Xuzhou 221116, china.2. Jiangsu Key laboratory of Resources and Environmental Information Engineering, china.University of Mining and Technology, Xuzhou 221116, china.3. State Key laboratory of Geohazard Prevention and Geoenvironment Protection, chengdu University of Technology, chengdu 610059, china Key laboratory for Land Environment and Disaster Monitoring of the State Bureau of Surveying and Mapping China University of Mining and Technology Xuzhou 221116 China Jiangsu Key laboratory of Resources and Environmental Information Engineering China University of Mining and Technology Xuzhou 221116 China State Key laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu 610059 China

Solid backfilling mining technology, which decreases the height of fissure zone and caving zone, and alleviates the subsidence, is a new technology for farmland conservation. Based on the situation analysis of farmland destruction in mining area, three ways for farmland protection were proposed. In order to improve the feasibility of this technology, the limited filling materials should be used to increase resources recovery ratio, and then the surplus materials could be backfilled into goaf. An index, namely farmland conservation ability, was put forward to optimize the ways for farmland conservation. At last, the Wanbei coal mine was taken as a case for farmland conservation. It was shown that 3.40 t dull coal was substituted and 52 hm2 farmland was conserved by solid backfilling mining in this coal mine.

关键词： solid backfilling farmland conservation mining subsidence equivalent mining height

Mining subsidence control by solid backfilling under buildings

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中国有色金属学会会刊：英文版 2011年第S3期21卷 670-674页

作者： ZHA Jian-feng1, 2, 3. GUO Guang-li1, 2, FENG Wen-kai3. WANG Qiang1, 2 1. Key laboratory for Land Environment and Disaster Monitoring of the State Bureau of Surveying and Mapping, china.University of Mining and Technology, Xuzhou 221116, china.2. Jiangsu Key laboratory of Resources and Environmental Information Engineering, china.University of Mining and Technology, Xuzhou 221116, china.3. State Key laboratory of Geohazard Prevention and Geoenvironment Protection, chengdu University of Technology, chengdu 610059, china Key laboratory for Land Environment and Disaster Monitoring of the State Bureau of Surveying and Mapping China University of Mining and Technology Xuzhou 221116 China Jiangsu Key laboratory of Resources and Environmental Information Engineering China University of Mining and Technology Xuzhou 221116 China State Key laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu 610059 China

Solid backfilling mining can reduce the buildings' damage caused by mining greatly. The reduction of subsidence value, the slow advancing speed and the subsidence caused by backfilling body compaction are the main reasons that solid backfilling mining velocity decreases significantly. Based on the research of mechanism, some principles on subsidence control of solid backfilling mining under buildings were proposed. The equivalent mining height was designed according to the fortification criteria of buildings and their attachment structures, which enables the ground movement and deformation caused by mining to be less than the corresponding fortification criteria.

关键词： solid backfilling mining subsidence control mining under buildings

Tissue Response of an Osteoinductive Bioceramic in Bone Defect Rabbit Model

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Journal of Wuhan University of Technology(Materials Science) 2010年第1期25卷 28-31页

作者：程丽佳步宏 Key laboratory of Transplant Engineering and Immunology Ministry of HealthWest China HospitalSichuan University Department of Pathology West China HospitalSichuan University

HA/TCP and HA rods （φ5 mm×10 mm） were made for implantation in New Zealand white rabbit with different condition. Sixty three rabbit were divided into three groups： group 1 （n=18）, group 2 （n=27） and group 3.（n=18）. In group 1, 10 mm radius was defected, and one HA/TCP rod was implanted in the muscle a distant away from the bone defect area. In group 2, also, 10 mm radius was defected, one HA rod was implanted in the muscle a distant away from the bone defect area. In group 3. two HA/TCP rods were implanted in the dorsal muscle of the rabbit with bone intact. Histological observation showed that in group 1, some new bone was found only two months after implantation （n=2）, and obvious immature woven bone could be observed in these bioceramics from the 3.d month on. However, in group 3. bone began to be found 6 months after implantation （n=2）. In group 2, we could not find any bone tissue up to 9 month’s observation. These results suggest that, first, the bone defect model could significantly accelerate bone formation at non-osseous sites in rabbits; second,. HA/TCP bioceramics were confirmed with osteoinductive property while HA bioceramics without osteoinductive property nearly. Thus, bone defect might be a good animal model for further researches for osteoinductive bioceramics.

关键词： HA/TCP osteoinduction animal model

Validation of three infiltration models on purple soil under simulated rainfall

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Progress in Natural Science:Materials International 2007年第9期17卷 1059-1066页

作者： Wang Yukuan1,2,Fu Bin1,3.Xu Pei1,2,Wang Daojie1,2,Wang Xiantuo1,3.and Wang Yongqiang1,3.1.Key laboratory of Mountain Surface Process and Hazards,Chinese Academy of Seiences,chengdu 610041,{3.2.Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,chengdu 610041,{3.3.Graduate University of the Chinese Academy of Sciences,Beijing 100049,{3. Key laboratory of Mountain Surface Process and Hazards Chinese Academy of Sciences Chengdu 610041 China Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

So as to find models suitable for the prediction of water infiltration in purple soil,infiltration rates simulated by three popular empirical infiltration models,Horton model,Kostiakov model,and the modified Kostiakov model,were compared by using those observed results on slope in purple soil under rainfall simulation.28 sets of infiltration data were divided into two parts for parameter estimation and validation *** performance of the three infiltration models was evaluated with the Nash and Sutcliffe efficiency *** results show that the percent for Nash and Sutcliffe efficiency greater than 0.7 is about 69.7% for the Horton model,and 48.48%,and 54.55% for the Kostiakov model and the modified Kostiakov model,*** model is better than Kostiakov model and the modified Kostiakov model in most rain events in the ***,Kostiakov model is still suitable for reasonable prediction of the infiltration in purple soil sloping farmland because fewer parameters are ***,rainfall intensity has significant effects on the parameter values used in the simulation *** simulation results can be improved by choosing suitable parameters according to the rainfall intensity.

关键词： infiltration model sloping farmland purple soil rainfall simulation

Constructing globally consecutive 3. conductive network using P-doped biochar cotton fiber for superior performance of silicon-based anodes

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Journal of Materials Science & Technology 2024年第6期173卷 181-191页

作者： Jun Cao Jianhong Gao Kun Wang Zhuoying Wu Xinxin Zhu Han Li Min Ling chengdu Liang Jun Chen Zhejiang Provincial Key laboratory of Advanced Chemical Engineering Manufacture Technology College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Institute of Zhejiang University-Quzhou Zheda Road 99Quzhou 324000China

The inferior conductivity and drastic volume expansion of silicon still remain the bottleneck in achieving high energy density Lithium-ion Batteries(LIBs).The design of the three-dimensional structure of electrodes by compositing silicon and carbon materials has been employed to tackle the above challenges,however,the exorbitant costs and the uncertainty of the conductive structure persist,leaving ample room for ***,silicon nanoparticles were innovatively composited with eco-friendly biochar sourced from cotton to fabricate a 3. globally consecutive conductive *** network serves a dual purpose:enhancing overall electrode conductivity and serving as a scaffold to maintain electrode *** conductivity of the network was further augmented by introducing P-doping at the optimum doping temperature of 3.0℃.Unlike the local conductive sites formed by the mere mixing of silicon and conductive agents,the consecutive network can affirm the improvement of the conductivity at a macro ***,first-principle calculations further validated that the rapid diffusion of Li^(+)is attributed to the tailored electronic microstructure and charge rearrangement of the *** prepared consecutive conductive Si@P-doped carbonized cotton fiber anode outperforms the inconsecutive Si@Graphite anode in both cycling performance(capacity retention of 1777.15 mAh g^(-1) vs.682.56 mAh g^(-1) after 150 cycles at 0.3.C)and rate performance(1244.24 mAh g^(-1) vs.3.0.28 mAh g^(-1) at 2.0 C).The findings of this study may open up new avenues for the development of globally interconnected conductive networks in Si-based anodes,thereby enabling the fabrication of high-performance LIBs.

关键词： 3. conductive network Biochar carbon-silicon anode Heteroatoms doping strategy DFT calculation Lithium-ion battery

Debris-flow of Zelongnong Ravine in Tibet

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Journal of Mountain Science 2011年第4期8卷 535-543页

作者： ZHANG Jinshan SHEN Xingju Key laboratory of Mountain Hazards and Earth Surface Processes Institute of Mountain Hazards and Environment CASChengdu 61oo41 China College of Tourism and History & Culture Southwest University for nationalities chengdu 61 oo41 China Graduate University CAS Beijing 10o049 China

Zelongnong Ravine,a branch ravine of Brahmaputra,is an old large glacier debris-flow ***-flows with medium and/or small scales occur almost every year;multiple super debris-flows have also broken out in history,and have caused destructive disaster to local residents at the mouth of ravine and blocked *** huge altitude difference and the steep slope of the Zelongnong Ravine provide predominant energy conditions for the *** drainage basin is located in the fast uplifted area,where the complicated geologic structure,the cracked rock,and the frequent earthquake make the rocks experience strong weathering,thus plenty of granular materials are available for the formation of *** this region is located in the rain shadow area,the precipitation is concentrated and most is with high ***,the strong glacier activity provides water source for *** to literature reviews,most debris-flows in the ravine are induced by rainstorms,and their scales are relatively ***,when the melted water is overlaid,the large scale debris-flows may *** calculation such as the flow velocity and the runoff is conducted according to the monitoring *** result shows that large debris-flows can be aroused when the rainstorm and the melted water are combined well,but the possibility of blocking off Brahmaputra is *** occurrence of the super debris-flows is closely related to the intense glacier activity(e.g.,glaciersurge).They often result in destructive disasters and are hard to be prevented and cured by engineering measures,due to the oversized *** hazard mitigation measures such as monitoring and prediction are proposed.

关键词： Tibet The Brahmaputra The Mt Namjagbarwa Zelongnong Ravine Debris-flow