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Supersymmetric Electroweak Corrections to the Decay of the Heavy Chargino into the Light Chargino and Z Boson

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Communications in Theoretical Physics 2002年第8期38卷 173-180页

作者： zhou Pei-jun MA Wen-Gan ZHANG Ren-You WAN Lang-Hui Department of Modern Physics University of Science and Technology of China Hefei 230027 China Department of Modern Physics University of Science and Technology of China Hefei 230027 China Department of Modern Physics University of Science and Technology of China Hefei 230027 China Department of Modern Physics University of Science and Technology of China Hefei 230027 China

The supersymmetric electroweak corrections to the partial width of the decay x2+ → Z0x1-+, including thecontributions from the third generation quarks and squarks, are presented within the minimal supersymmetric standardmodel. With the reasonable parameters sets, which open this decay channel kinematically, the relative corrections canreach the value of ～ -6%. Therefore they should be taken into consideration for the precise experimental measurementat future colliders.

关键词： minimal supersymmetric standard model, chargino, electroweak correction

灯泡贯流式水轮发电机组轴流风机智能控制系统设计

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水电站机电技术 2024年第4期47卷 34-36,43页

作者：罗显莅周军长施明星中国东方电气集团东方电机有限公司四川德阳618000

轴流风机作为通风冷却系统的动力部件,由于长期运行,且现场运行条件恶劣,风机振动、温度高等原因,轴流风机容易发生故障,比如轴承损坏,这对机组的稳定运行不利,且一旦发生故障,检修工作量很大。每台贯流式发电机组配置有一定数量的轴流... 详细信息

轴流风机作为通风冷却系统的动力部件,由于长期运行,且现场运行条件恶劣,风机振动、温度高等原因,轴流风机容易发生故障,比如轴承损坏,这对机组的稳定运行不利,且一旦发生故障,检修工作量很大。每台贯流式发电机组配置有一定数量的轴流风机(一般为6~8台风机),圆周布置,作为发电机空冷系统辅助设备。通风系统的设计容量,考虑了发电机的各种工况的热损耗、环境温度的变化,并预留有较大的设计余量。本轴流风机智能控制系统,对风机运行参数进行在线监测,优化风机运行控制流程,降低风机连续运行时间,有效延长风机运行寿命,节能降噪,提高机组智能化水平。

关键词：智能调节轴流风机灯泡贯流式水轮发电机

Amorphous Zr(OH)4 coated LiNi0.915Co0.075Al0.01O2 cathode material with enhanced electrochemical performance for lithium ion batteries

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Journal of Energy Chemistry 2017年第3期26卷 481-487页

作者： Zhen Zhang Pengfei zhou Huanju Meng Chengcheng Chen Fangyi Cheng Zhanliang Tao jun Chen Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)and Collaborative Innovation Center of Chemical Science and Engineering College of ChemistryNankai UniversityTianjin 300071China

LiNiCoAlO（NCA） with Zr（OH）coating is demonstrated as high performance cathode material for lithium ion batteries（LIBs）. The coated materials are synthesized via a simple dry coating method of NCA with Zr（OH）powders, and then characterized with scanning electron microscopy（SEM）, transmission electron microscopy（TEM） and X-ray photoelectron spectroscopy（XPS）. Experimental results show that amorphous Zr（OH）powders have been successfully coated on the surface of spherical NCA particles, exhibiting improved electrochemical performance. 0.50 wt% Zr（OH）coated NCA delivers a capacity of 197.6 mAh/g at the first cycle and 154.3 mAh/g after 100 cycles with a capacity retention of 78.1% at 1 C rate. In comparison, the pure NCA shows a capacity of 194.6 mAh/g at the first cycle and 142.5 mAh/g after 100 cycles with a capacity retention of 73.2% at 1 C rate. Electrochemical impedance spectroscopy（EIS） results show that the coated material exhibits a lower resistance, indicating that the coating layer can efficiently suppress transition metals dissolution and decrease the side reactions at the surface between the electrode and electrolyte. Therefore, surface coating with amorphous Zr（OH）is a simple and useful method to enhance the electrochemical performance of NCA-based materials for the cathode of LIBs.

关键词： Ni-rich cathode material Surface modification Dry coating method Zr(OH)4 powders Electrochemical performance

An Overview of Structural Design,Analysis and Common Monitoring Technologies for Floating Platform and Flexible Cable and Riser

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China Ocean Engineering 2022年第4期36卷 511-531页

作者： WU Wen-hua ZHAO Yan GOU Ying LYU Bai-cheng LU qing-zhen LU Zhao-kuan YAN jun Faculty of Vehicle Engineering and Mechanics State Key Laboratory of Structural Analysis of Industrial Equip-mentDalian University of TechnologyDalian 116024China Ningbo Institute of Dalian University of Technology Ningbo 315000China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China China National Offshore Oil Corporation(CNOOC)Research Institute Beijing 100027China

Offshore oil and gas development plays an important part in the global energy *** platforms and flexible pipes are the key equipments in the whole offshore oil and gas development *** of the randomness and uncertainty of wave and current loads in the ocean environment,the structural design and mechanical analysis of the marine equipment can be highly ***,this paper reviews the recent works of the theoretical model,numerical simulation,and experimental test in three research areas:hydrodynamic analysis of offshore platforms,structural mechanics analysis of flexible pipe and cable,and monitoring technology of offshore floating structures under marine *** analyzing their main research methods and key technical difficulties,this paper provides theoretical basis and technical support for the reliability engineering application of offshore platforms and flexible ***,China is relatively backward in the design of marine floating platform,the design,analysis and testing of flexible pipeline and cable,as well as the marine equipment prototype monitoring technology *** for breakthroughs at the earliest possible stage in the above fields,prime research should be focused on and strategic planning should be made to deal with“key areas and stranglehold problems”.It is of great significance for the development of China's deep-sea energy and resource development of independent technology and on time to achieve the“carbon peak”national strategic objectives.

关键词： review marine floating platform flexible pipeline and cable prototype monitoring

Dilepton Production in an Expanding Hot Baryon-Rich Quark-Gluon Matter

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Chinese Physics Letters 1999年第4期16卷 259-261页

作者： He Ze-jun ZHANG Jia-ju JIANG Wei-zhou QIU Xi-jun LIU Bo Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion AcceleratorLanzhou 730000 Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800 Institute of High Energy Chinese Academy of SciencesBeijing 100039

From the full stopping scenario,a relativistic hydrodynamic model describing the evolution of the baryon-rich quark-gluon matter fire-cylinder has been *** on it,the rapidity Distribution of dileptons with intermediate invariant masses has been *** is found that the quark phase gives the dominant contribution to the dilepton spectrum due to the influence of the phase boundary on the evolution of the system,especially the dilepton yield is strongly suppressed with the increasing rapidity.

关键词： quark lepton invariant

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采用单环微谐振器的光滤波器特性及其局限性

光电子．激光 2003年第1期14卷 12-16页

作者：杨建义江晓清王明华 zhou qing-jun Chen Ray T 浙江大学信息与电子工程学系浙江杭州310027 Microelectronics Research Center/Dept.of Electrical and Computer Engineering University of Texas at AustinAustin TX 78758USA

对采用单环微谐振器的光滤波器的特性进行了分析。在给出的传递函数和相关特性公式基础上 ,分析了出 /入环光耦合系数与通带带宽和通带消光比间的关系 ,指出了它们之间、以及与自由谱范围间存在的相互约束 ;分析并给出了单环光滤波器的... 详细信息

对采用单环微谐振器的光滤波器的特性进行了分析。在给出的传递函数和相关特性公式基础上 ,分析了出 /入环光耦合系数与通带带宽和通带消光比间的关系 ,指出了它们之间、以及与自由谱范围间存在的相互约束 ;分析并给出了单环光滤波器的通带带宽比例 ,带宽比例值不依赖于任何器件结构参数 ,是限制单环微谐振器作为实用光滤波器的主要因素 ;分析了存在于微环中光的损耗对单环光滤波器输出的影响 ,小的光损耗即会导致滤波响应的巨大衰减 ,大的光损耗则更是会导致带宽的展宽和带宽比例值的增大。

关键词：光滤波器光波导光微环谐振器传递函数

Investigation on extreme frequency shift in silica fiber-based high-power Raman fiber laser

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High Power Laser Science and Engineering 2018年第2期6卷 103-109页

作者： Jiaxin Song Hanshuo Wu jun Ye Hanwei Zhang Jiangming Xu Pu zhou Zejin Liu College of Optoelectronic Science and Engineering National University of Defense Technology

In this paper, we experimentally investigated the extreme frequency shift in high-power Raman fiber laser(RFL). The RFL was developed by using a pair of fiber Bragg gratings with fixed and matched central wavelength(1120 nm)combined with a piece of 31-m-long polarization maintaining(PM) passive fiber adopted as Raman gain *** pump source was a homemade high-power, linearly polarized(LP) wavelength-tunable master oscillator power amplifier(MOPA) source with ～25 nm tunable working range(1055–1080 nm). High-power and high-efficiency RFL with extreme frequency shift between the pump and Stokes light was explored. It is found that frequency shift located within 10.6 THz and 15.2 THz can ensure efficient Raman lasing, where the conversion efficiency is more than 95% of the maximal value, 71.3%. In addition, a maximum output power of 147.1 W was obtained with an optical efficiency of71.3%, which is the highest power ever reported in LP RFLs to the best of our knowledge.

关键词： linearly polarized laser Raman fiber laser Raman gain spectrum

A communication-reduced and computation-balanced framework for fast graph computation

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Frontiers of Computer Science 2018年第5期12卷 887-907页

作者： Yongli CHENG Fang WANG Hong JIANG Yu HUA Dan FENG Lingling ZHANG jun zhou College of Mathematics and Computer Science FuZhou University Fuzhou 350116 China Wuhan National Laboratory for Optoelectronics School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518300 China Department of Computer Science & Engineering University of Texas at Arlington Arlington TX 76019 USA

The bulk synchronous parallel （BSP） model is very user friendly for coding and debugging parallel graph algorithms. However, existing BSP-based distributed graphprocessing frameworks, such as Pregel, GPS and Giraph, routinely suffer from high communication costs. These high communication costs mainly stem from the fine-grained message-passing communication model. In order to address this problem, we propose a new computation model with low communication costs, called LCC-BSE We use this model to design and implement a high-performance distributed graphprocessing framework called LCC-Graph. This framework eliminates high communication costs in existing distributed graph-processing frameworks. Moreover, LCC-Graph also balances the computation workloads among all compute nodes by optimizing graph partitioning, significantly reducing the computation time for each superstep. Evaluation of LCC-Graph on a 32-node cluster, driven by real-world graph datasets, shows that it significantly outperforms existing distributed graph-processing frameworks in terms of runtime, particularly when the system is supported by a highbandwidth network. For example, LCC-Graph achieves an order of magnitude performance improvement over GPS and GraphLab.

关键词： graph computation communication decrease computation balance

Inhibited shuttle effect by functional separator for room-temperature sodium-sulfur batteries

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Journal of Materials Science & Technology 2022年第18期113卷 207-216页

作者： Chunwei Dong Hongyu zhou Hui Liu Bo Jin Zi Wen Xingyou Lang Jianchen Li Jaekwang Kim qing Jiang Key Laboratory of Automobile Materials Ministry of Educationand School of Materials Science and EngineeringJilin UniversityChangchun 130022China Department of Energy Convergence Engineering Cheongju University298 Daeseong-roCheongwon-guCheongjuChungbuk363-764Korea

According to a statistic,approximately 6 trillion cigarettes are smoked each year all over the world,which produces approximately 1.2 million tons of discarded cigarette *** discarded cigarette filters are non-biodegradable,thus they produce a mass of waste disposal and cause environmental pollution *** the purpose of transforming waste into wealth and reducing environmental pollution,nitrogen and sulfur co-doped carbon nanofiber/carbon black(N,S-CNF/CB)composite derived from the discarded cigarette filters is employed to modify glass fiber(GF)separator for the first time in this study.N,S-CNF improves binding ability towards sodium polysulfides(SPSs)by ***-polar CB limits the dissolution of SPSs in the liquid electrolyte by *** experiment and density functional theory calculation results indicate that a RT-Na/S battery with a N,S-CNF/CB+GF separator exhibits good cycling stability and rate *** 100 cycles at a low current rate of 0.1 C,a RT-Na/S battery with a sulfur mass fraction of 71%delivers a discharge capacity of 703 mAh g^(−1).In addition,at a high current rate of 0.5 C,a discharge capacity of 527 mAh g^(−1) is still maintained after 900 cycles with a very low capacity fading rate of 0.035%per cycle.

关键词： Shuttle effect Density functional theory Functional separator Nitrogen and sulfur co-doping Room-temperature sodium-sulfur batteries