检索结果-南通市图书馆

能源与节能 2024年第7期 302-304页

作者：祝宝君大同科大煤机有限公司山西大同037003

对煤矿皮带机工作原理、结构及故障分类进行分析。针对电气、机械和传感器故障,提出了排查、定位和处理措施,有利于深入了解煤矿皮带机故障处理的综合方法和实际应用。

关键词：煤矿皮带机故障故障处理

Filaments in high-speed counter-streaming plasma interactions driven by high-power laser pulses

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2013年第12期56卷 2381-2385页

作者： YUAN DaWei LI YuTong SU LuNing LIAO GuoQian YIN ChuanLei zhu baojun ZHANG Jie Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences

Interactions of two counter-streaming plasmas driven by high power laser pulses are studied on Shenguang II laser *** structures were observed in the interaction region after the electrostatic shockwave *** analysis and observations indicate that the filaments are because of collisionless mechanisms,which are caused by the electromagnetic instability,such as the beam-Weibel *** experiments were also carried out for comparison and no filaments were generated.

关键词： laser-produced plasmas coilisionless shock waves Weibel instability

Generation of strong magnetic fields with a laser-driven coil

在线全文

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2018年第3期6卷 1-8页

作者： Zhe Zhang baojun zhu Yutong Li Weiman Jiang Dawei Yuan Huigang Wei Guiyun Liang Feilu Wang Gang Zhao Jiayong Zhong Bo Han Neng Hua Baoqiang zhu Jianqiang zhu Chen Wang Zhiheng Fang Jie Zhang Beijing National Laboratory of Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China Collaborative Innovation Center oflFSA (CICIFSA) Shanghai Jiao Tong University Shanghai 200240 China Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China Department of Astronomy Beijing Normal University Beijing 100875 China National Laboratory on High Power Laser and Physics Chinese Academy of Sciences Shanghai 201800 China Shanghai Institute of Laser Plasma Shanghai 201800 China Key Laboratory for Laser Plasmas (MoE) and Department of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China

As a promising new way to generate a controllable strong magnetic field, laser-driven magnetic coils have attracted interest in many research fields. In 2013, a kilotesla level magnetic field was achieved at the Gekko XII laser facility with a capacitor-coil target. A similar approach has been adopted in a number of laboratories, with a variety of targets of different shapes. The peak strength of the magnetic field varies from a few tesla to kilotesla, with different spatio- temporal ranges. The differences are determined by the target geometry and the parameters of the incident laser. Here we present a review of the results of recent experimental studies of laser-driven magnetic field generation, as well as a discussion of the diagnostic techniques required for such rapidly changing magnetic fields. As an extension of the magnetic field generation, some applications are discussed.

关键词： lab astrophysics laser-plasma interaction magnetic field plasma astrophysics

Monitoring shear deformation of sliding zone via fiber Bragg grating and particle image velocimetry

在线全文

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2024年第1期16卷 231-241页

作者： Deyang Wang Honghu zhu Guyu Zhou Wenzhao Yu baojun Wang Wanhuan Zhou School of Earth Sciences and Engineering Nanjing UniversityNanjing210023China Institute of Earth Exploration and Sensing Nanjing UniversityNanjing210023China State Key Laboratory of Internet of Things for Smart City University of MacaoMacaoChina

Monitoring shear deformation of sliding zones is of great significance for understanding the landslide evolution mechanism,in which fiber optic strain sensing has shown great ***,the cor-relation between strain measurements of quasi-distributed fiber Bragg grating(FBG)sensing arrays and shear displacements of surrounding soil remains *** this study,a direct shear model test was conducted to simulate the shear deformation of sliding zones,in which the soil internal deformation was captured using FBG strain sensors and the soil surface deformation was measured by particle image velocimetry(PIV).The test results show that there were two main slip surfaces and two secondary ones,developing a spindle-shaped shear band in the *** formation of the shear band was successfully captured by FBG sensors.A sinusoidal model was proposed to describe the fiber optic cable deformation *** this basis,the shear displacements and shear band widths were calculated by using strain *** work provides important insight into the deduction of soil shear deformation using soil-embedded FBG strain sensors.

关键词： Landslide Shear band Fiber bragg grating(FBG) Particle image velocimetry(PIV) Sinusoidal model Strain‒displacement proportional coefficient

Application of fluid modulus inversion to complex lithology reservoirs in deep-water areas

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy Geoscience

Energy Geoscience 2024年第1期5卷 153-161页

作者： Zhaoming Chen Huaxing Lyu Zhongtao Zhang Yanhui zhu baojun Liu CNOOC Deepwater Development Limited ShenzhenGuangdong518054China

It has been a challenge to distinguish between seismic anomalies caused by complex lithology and hydrocarbon reservoirs using conventional fluid identification techniques,leading to difficulties in accurately predicting hydrocarbon-bearing properties and determining oil-water contacts in *** this study,we built a petrophysical model tailored to the deep-water area of the Baiyun Sag in the eastern South China Sea based on seismic data and explored the feasibility of the tri-parameter direct inversion method in the fluid identification of complex lithology reservoirs,offering a more precise alternative to conventional *** research found that the fluid modulus can successfully eliminate seismic amplitude anomalies caused by lithological ***,the seismic databased direct inversion for fluid modulus can remove the cumulative errors caused by indirect inversion and the influence of *** discovered that traditional methods using seismic amplitude anomalies were ineffective in detecting fluids,determining gas-water contacts,or delineating high-quality ***,the fluid factor Kf,derived from solid-liquid decoupling,proved to be sensitive to the identification of hydrocarbon-bearing properties,distinguishing between high-quality and poor-quality gas *** findings confirm the value of the fluid modulus in fluid identification and demonstrate that the tri-parameter direct inversion method can significantly enhance hydrocarbon exploration in deep-water areas,reducing associated risks.

关键词： Fluid identification Seismic fluid factor Solid-liquid decoupling Deep-water area Complex lithology reservoir

Measurement and analysis of K-shell lines of silicon ions in laser plasmas

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2018年第2期6卷 133-140页

作者： Bo Han Feilu Wang Jiayong Zhong Guiyun Liang Huigang Wei Dawei Yuan baojun zhu Fang Li Chang Liu Yanfei Li Jiarui Zhao Zhe Zhang Chen Wang Jun Xiong Guo Jia Neng Hua Jianqiang zhu Yutong Li Gang Zhao Jie Zhang Department of Astronomy Beijing Normal University Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences IFSA Collaborative Innovation Center Shanghai Jiao Tong University National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Research Center for Laser Fusion China Academy of Engineering Physics National Laboratory on High Power Laser and Physics Chinese Academy of Sciences Key Laboratory for Laser Plasmas (MoE) and Department of Physics and Astronomy Shanghai Jiao Tong University

We present laboratory measurement and theoretical analysis of silicon K-shell lines in plasmas produced by Shenguang II laser facility, and discuss the application of line ratios to diagnose the electron density and temperature of laser *** types of shots were carried out to interpret silicon plasma spectra under two conditions, and the spectra from 6.6 ?A to6.85 ?A were measured. The radiative-collisional code based on the flexible atomic code(RCF) is used to identify the lines, and it also well simulates the experimental spectra. Satellite lines, which are populated by dielectron capture and large radiative decay rate, influence the spectrum profile significantly. Because of the blending of lines, the traditional G value and R value are not applicable in diagnosing electron temperature and density of plasma. We take the contribution of satellite lines into the calculation of line ratios of He-α lines, and discuss their relations with the electron temperature and density.

关键词： high energy density physics laser plasmas interaction plasmas astrophysics

Observation of Zeeman splitting effect in a laser-driven coil

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2022年第2期7卷 18-24页

作者： baojun zhu Zhe Zhang Chang Liu Dawei Yuan Weiman Jiang Huigang Wei Fang Li Yihang Zhang Bo Han Lei Cheng Shangqing Li Jiayong Zhong Xiaoxia Yuan Bowei Tong Wei Sun Zhiheng Fang Chen Wang Zhiyong Xie Neng Hua Rong Wu Zhanfeng Qiao Guiyun Liang Baoqiang zhu Jianqiang zhu Shinsuke Fujioka Yutong Li Beijing National Laboratory of Condensed Matter Physics Institute of PhysicsCASBeijing 100190China Institute of Laser Engineering Osaka University2-6 Yamada-okaSuitaOsakaJapan Songshan Lake Materials Laboratory DongguanGuangdong 523808China Department of Advanced Photon Research Kansai Photon Science InstituteNational Institutes for Quantum and Radiological Science and Technology619-0215 KyotoJapan Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Department of Astronomy Beijing Normal UniversityBeijing 100875China Center for Advanced Material Diagnostic Technology College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118China Shanghai Institute of Laser Plasma Shanghai 201800China National Laboratory on High Power Laser and Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China

The Zeeman splitting effect is observed in a strong magnetic field generated by a laser-driven *** expanding plasma from the coil wire surface is concentrated at the coil center and interacts with the simultaneously generated magnetic *** Cu I spectral lines at wavelengths of 510.5541,515.3235,and 521.8202 nm are detected and *** splittings of spectral lines are used to estimate the magnetic field strength at the coil center as∼31.4±15.7 T at a laser intensity of∼5.6310^(15) W/cm^(2),which agrees well with measurements using a B-dot *** other plasma parameters of the central plasma disk are also *** temperature is evaluated from the Cu I spectral line intensity ratio,while the electron density is estimated from the Stark broadening effect.

关键词： laser splitting effect

Laser-driven plasma collider for nuclear studies

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science Bulletin 2015年第13期60卷 1211-1213页

作者： Changbo Fu Jie Bao Liming Chen Jianjun He Long Hou Liang Li Yanfei Li Yutong Li Guoqian Liao Yongjoo Rhee Yang Sun Shiwei Xu Dawei Yuan Xiaopeng Zhang Gang Zhao Jiarui Zhao baojun zhu Jianqiang zhu Jie Zhang Department of Physics and Astronomy Shanghai Jiao Tong University Physics Department China Institute of Atomic Energy Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences IFSA Collaborative Innovation Center Shanghai Jiao Tong University Institute of Modern Physics Chinese Academy of Sciences Nuclear Data Center Korea Atomic Energy Research Institute National Astronomical Observatories Chinese Academy of Sciences Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences

A novel method of initiating nuclear fusion reactions in a full plasma environment was suggested, and a proof-of-concept experiment was carried out with the D ＋D → n＋3He reaction. In this new approach, two plasma jets generated by high-intensity lasers collide headon-head. The center-of-mass energy of the nuclei increases accordingly, and therefore, reaction products can be significantly enhanced, especially in the sub-Coulomb barrier ranges. As a result of the fusion reaction, up to - 7.6 ×105 neutrons had been observed. This new type of ＂plasma collider＂ could provide an innovative tool to study nuclear reactions under astrophysical conditions.

关键词： Plasma collider - D-D neutron .Laboratory nuclear astrophysics - High-intensity laser

自蔓延高温合成La_(1-x)Sr_xMnO_3过程中杂质产生原因的热力学分析

在线全文

学校读者我要写书评

暂无评论

稀有金属材料与工程 2007年第3期36卷 513-516页

作者：祝宝军陶颖贡涛唐元洪王平湖南大学材料科学与工程学院湖南长沙410082 中南大学材料科学与工程学院湖南长沙410083

热力学计算和实验分析相结合,分析了自蔓延高温合成La1-xSrxMnO3过程中杂质产生的原因并给出了消除杂质的方法。结果表明:当采用MnO2稀释剂时,由于生成La2SrO4的吉布斯自由能与生成SrMnO3的自由能相当,自蔓延高温合成产物中容易生成La2S... 详细信息

热力学计算和实验分析相结合,分析了自蔓延高温合成La1-xSrxMnO3过程中杂质产生的原因并给出了消除杂质的方法。结果表明:当采用MnO2稀释剂时,由于生成La2SrO4的吉布斯自由能与生成SrMnO3的自由能相当,自蔓延高温合成产物中容易生成La2SrO4杂质相,采用La1-xSrxMnO3作稀释剂,可以避免La2SrO4的产生;当稀释剂较多时,合成产物中容易产生Mn3O4杂质相,消除的方法是控制稀释剂添加量,控制自蔓延反应速度和体系温度。

关键词：固体氧化物燃料电池自蔓延高温合成热力学 La1-x SrxMnO3

Proton radiography of magnetic fields generated with an open-ended coil driven by high power laser pulses

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2016年第4期1卷 187-191页

作者： Guoqian Liao Yutong Li baojun zhu Yanfei Li Fang Li Mengchao Li Xuan Wang Zhe Zhang Shukai He Weiwu Wang Feng Lu Faqiang Zhang Lei Yang Kainan Zhou Na Xie Wei Hong Yuqiu Gu Zongqing Zhao Baohan Zhang Jie Zhang National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China Science and Technology on Plasma Physics Laboratory Laser Fusion Research CenterChina Academy of Engineering Physics(CAEP)Mianyang 621900China Key Laboratory for Laser Plasmas(MoE)and Department of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IFSA(CICIFSA) Shanghai Jiao Tong UniversityShanghai 200240China

Recently generation of strong magnetic(B)fields has been demonstrated in capacitor coils heated by high power laser pulses[*** et al.,***.3,1170(2013)].This paper will present a direct measurement of B field generated with an open-ended coil target driven by a nanosecond laser pulse using ultrafast proton *** radiographs are analyzed with particle-tracing *** B field at the coil center is inferred to be ~50 T at an irradiance of ~5×10^(14) W·cm^(-2).The B field generation is attributed to the background cold electron flow pointing to the laser focal spot,where a target potential is induced due to the escape of energetic electrons.

关键词： Strong magnetic field Laser-driven coil targets Proton radiography