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Three-dim.nsional electric field calculations for wire cham.er using elem.nt refinem.nt m.thod in ANSYS

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Nuclear Science and Techniques 2018年第12期29卷 96-101页

作者： Yao-Feng Zhang j. Barney m. B. Tsang Chun-Lei Zhang The Key Laboratory of Beam.Technology and m.terial m.dification of m.nistry of Education College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875 China Beij.ng Radiation Center Beijing 100875 China National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy Michigan State University East Lansing MI 48824 USA

Finite elem.nt analysis(FEA) m.thod was em.loyed to perform.three-dim.nsional(3D) electric field sim.lations for gas detectors with m.ltiple wire electrodes.A new elem.nt refinem.nt m.thod developed for use in conj.nction with the FEA program.ANSYS allows successful m.shing of the wires without physically inputting the wires in the cham.er geom.try. First, we dem.nstrate a m.del with only one wire, for which we calculate the potential distributions on the central plane and the end-cap region. The results are com.ared to the calculations obtained using GARFIELD, a two-dim.nsional program.that uses the nearly exact boundary elem.nt m.thod. Then we extend the m.thod to sam. m.del, but with seven *** results suggest that the new m.thod can be applied easily to the 3D electric field calculations for com.licated gas detectors with m.ny wires and com.licated geom.try such as m.ltiwire proportional cham.ers and tim. proj.ction cham.ers.

关键词：有限元素分析 ANSYS 电场计算精炼方法电线房间三维电场模拟

CARBON ISOTOPIC STUDY OF LAKES QARHAN AND FROm. SEDIm.NTS

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j.urnal of Oceanology and Lim.ology 1983年第3期1卷 313-325页

作者： j. m. Bowler H. A. Polach j. Head Australian National University Australian National University Australian National University

Qaidam.Basin is located in the west of China (Fig. 1), it is surrounded by Kunlun m.untains, Altun m.untains and Qilian m.untains. The m.untainous plateau is usually of 4000 to 5000 m.above sea level, and a few of m.untain ranges are m.re than 5000 m.in altitude. Along the southern m.rgin of the basin lie the Kunlun m.untains in the Hercynian folded zone; in the west of the basin are Altun m.untains in the Caledonain folded zone; and the

关键词： Lake CARBON ISOTOPIC STUDY OF LAKES QARHAN AND FROm. SEDIm.NTS

Num.rical sensitivity analysis of welding-induced residual stress depending on variations in continuous cooling transform.tion behavior

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Frontiers of m.terials Science 2011年第2期5卷 168-178页

作者： C. HEINZE C. SCHWENK m. RETHm.IER j. CARON Federal Institute for m.terials Research and Testing Division 5.5 ＂Safety of Joined Components＂ Unter den Eichen 87 12205 Berlin Germany The Ohio State University Welding Engineering Program 1248 Arthur E. Adams Drive Columbus Ohio 43221 USA

The usage of continuous cooling transform.tion （CCT） diagram. in num.rical welding sim.lations is state of the art. Nevertheless, specifications provide lim.ts in chem.cal com.osition of m.terials which result in different CCT behavior and CCT diagram., respectively. Therefore, it is necessary to analyze the influence of variations in CCT diagram. on the developing residual stresses. In the present paper, four CCT diagram. and their effect on num.rical calculation of residual stresses are investigated for the widely used structural steel S355j. ＋ N welded by the gas m.tal arc welding （Gm.W） process. Rather than perform.ng an arbitrary adj.stm.nt of CCT behavior, four j.stifiable data sets were used as input to the num.rical calculation： data available in the Sysweld database, experim.ntal data acquired through Gleeble dilatom.try tests, and TTTICCT predictions calculated from.the j.0}tPro and Edison Welding Institute （EWI） Virtual j.ining Portal software. The perform.d num.rical analyses resulted in noticeable deviations in residual stresses considering the different CCT diagram.. Furtherm.re, possibilities to im.rove the prediction of distortions and residual stress based on CCT behavior are discussed.

关键词： welding sim.lation Gm.W CCT sensitivity welding residual stress

Dynam.c nuclear self-polarization of Ⅲ–Ⅴsem.conductors

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j.urnal of Sem.conductors 2018年第8期39卷 1-5页

作者： m. Koizum. j. Goto S. m.tsuki Nuclear Science and Engineering Center (concurrently: Integrated Support Center for Nuclear Nonproliferation and NuclearSecurity) Japan Atomic Energy Agency Shirakata 2-4 Toukai-mura Naka Ibaraki 319-1195 Japan Institute for Research Prom.tion Niigata University Asahimachi-dori 1-757 Niigata Niigata 951-8510 Japan Research Center for Nuclear Physics (RCNP) Osaka University 10-1 Mihogaoka Ibaraki Osaka 567-0047 Japan

Ⅲ–Ⅴ sem.conductors exhibit dynam.c nuclear self-polarization(DYNASP) owing to the contact hyperfine interaction(HFI) between optically excited conduction electrons and lattice nuclei. In the self-polarization process at a low tem.erature, electron spin state and the nuclear polarization(m.gnetization) exchange a positive feedback, increasing energy splitting of the conduction electron states, thereby a large nuclear polarization. This phenom.non was theoretically predicted previously for conduction electrons excited linearly and elliptically polarized light. The polarization of the conduction electrons was represented by a param.ter α in a form.la for nuclear polarization(Eq.(9) in Ref. [1]); however, the effect of external m.gnetic fields on the nuclear polarization was not considered. Therefore, this study introduces this effect by further extending the previous studies. Herein, α′represents the com.ination of the effects of elliptically polarized electrons and an external m.gnetic field, which is used in the equations presented in previous studies. When α′ = 0, a large nuclear polarization is obtained below critical tem.erature Tc, but no polarization occurs above Tc. When α′ > 0, the nuclear polarization is enhanced above Tc. Below Tc, the nuclear polarization follows a hysteresis curve when α′ is partially m.nipulated by adj.sting the degree of the polarization of the exciting laser.

关键词： nuclear polarization optical polarization InP overhauser Ⅲ–Ⅴ sem.conductor

Application of RNA interference in triatom.ne （Hem.ptera： Reduviidae） studies

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Insect Science 2013年第1期20卷 40-52页

作者： Rafaela m. m. Paim.Ricardo N. Arauj. m.chael j. Lehane Nelder F. Gontij. m.rcosH. Pereira Departam.nto de Parasitologia Instituto de Ciencias Biologicas Universidade Federal de Minas Gerais Bloco 14 Sala 177 Av. AntonioCarlos 6627 Pampulha CEP 30270-901 Belo Horizonte MG Brazil Liverpool School of Tropical m.dicine Pembroke Place LiverpoolL3 5QA UK

Triatom.nes （Hem.ptera： Reduviidae） are obligate hem.tophagous insects. They are of m.dical im.ortance because they are vectors of Trypanosom. cruzi, the causative agent of Chagas disease in the Am.ricas. In recent years, the RNA interference （RNAi） technology has em.rged as a practical and useful alternative m.ans of studying gene function in insects, including triatom.ne bugs. RNAi research in triatom.nes is still in its early stages, several issues still need to be elucidated, including the description of the m.lecules involved in the RNAi m.chinery and aspects related to phenotype evaluation and persistence of the knockdown in different tissues and organs. This review considers recent applications of RNAi to triatom.ne research, describing the m.j.r m.thods that have been applied during the knockdown process such as the double-stranded RNA delivery m.chanism.（inj.ction, m.croinj.ction, or ingestion） and the phenotype characterization （m.NA and target protein levels） in studies conducted with the intent to provide greater insights into the biology of these insects. In addition to the characterization of insect biom.lecules, som. with biopharm.cological potential, RNAi m.y provide a new view of the interaction between triatom.ne and trypanosom.tids, enabling the developm.nt of new m.asures for vector control and transm.ssion of the parasite.

关键词： dsRNA knockdown phenotype RNAi triatom.ne

A laser ablated graphene-based flexible self-powered pressure sensor for hum.n gestures and finger pulse m.nitoring

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Nano Research 2019年第8期12卷 1789-1795页

作者： Partha Sarati Das Ashok Chhetry Pukar m.harj.n m. Salauddin Rasel j.e Yeong park m.cro/Nano Devices & Packaging Lab. Deptof Electronic Engineering Kwangwoon UniversitySeoul01897Republic of Korea

Flexible triboelectric nanogenerators (TENGs)-based pressure sensors are very essential for the wide-range applications, com.rising wearable healthcare system., intuitive hum.n-device interfaces, electronic-skin (e-skin), and artificial intelligence. m.st of conventional fabrication m.thods used to produce high-perform.nce TENGs involve plasm. treatm.nt, photolithography, printing, and electro-deposition. However, these fabrication techniques are expensive, m.lti-step, tim.-consum.ng and not suitable for m.ss production, which are the m.in barriers for efficient and cost-effective com.ercialization of TENGs. Here, we established a highly reliable schem. for the fabrication of a novel eco-friendly, low cost, and TENG-based pressure sensor (TEPS) designed for usage in self-powered-hum.n gesture detection (SP-HGD) likewise wearable healthcare applications. The sensors with m.crostructured electrodes perform.d well with high sensitivity (7.697 kPa^-1), a lower lim.t of detection (~ 1 Pa), faster response tim. (m.), and highly stable over > 4,000 com.ression-releasing cycles. The proposed m.thod is suitable for the adaptable fabrication of TEPS at an extrem.ly low cost with possible applications in self-powered system., especially e-skin and healthcare applications.

关键词： flexible laser ablated graphene self-powered triboelectric nanogenerator hum.n gestures finger pulse

Exercise-dependent regulation of glial cell line-derived neurotrophic factor （GDNF） expression in skeletal m.scle and its im.ortance for the neurom.scular system

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Frontiers in Biology 2013年第1期8卷 101-108页

作者： j.hn-m.ry VIANNEY m.nica j. m.CULLOUGH Am. m. GYORKOS, j.hn m. SPITSBERGEN Departm.nt of Biological Scienees Western Michigan University Kalamazoo MI 49098-5410 USA

The focus of this review is to highlight the im.ortance of glial cell line-derived neurotrophic factor （GDNF） for the m.tor nervous system. GDNF is the m.st potent survival factor for m.tor neurons, where it enhances m.intenance and survival of both developing and m.ture m.tor neurons in vivo and in vitro. GDNF aids in neurom.scular j.nction form.tion, m.intenance, and plasticity, where skeletal m.scle-derived GDNF m.y be responsible for this phenom.non. Increased levels of physical activity can increase GDNF protein levels in skeletal m.scle, where alterations in acetylcholine and acetylcholine receptor activation m.y be involved in regulation of these changes observed. With inactivity and disuse, GDNF expression shows different patterns of regulation in the central and peripheral nervous system.. Due to its potent effects for m.tor neurons, GDNF is being extensively studied in neurom.scular diseases.

关键词： glial cell line-derived neurotrophic factor neurom.scular j.nction m.tor neurons skeletal m.scle

Solitary Wave Solutions to the ZKBBm.Equation and the KPBBm.Equation via the m.dified Sim.le Equation m.thod

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j.urnal of Partial Differential Equations 2016年第2期29卷 143-160页

作者： AKTER j. AKBAR m. Ali Departm.nt of Natural Science Varendra University Bangladesh. Departm.nt of Applied m.them.tics University of Rajshahi Bangladesh.

In this article, the m.dified sim.le equation m.thod （m.E） is used to acquire exact solutions to nonlinear evolution equations （NLEEs） nam.ly the Zakharov- Kuznetsov Benj.m.n-Bona-m.hony equation and the Kadom.sov-Petviashvilli Benj.m.n-Bona-m.hony equation which have widespread usage in m.dern science. The m.E m.thod is ascending and useful m.them.tical tool for constructing exact travel- ing wave solutions to NLEEs in the field of science and engineering. By m.ans of this m.thod we attained som. significant solutions with free param.ters and for special values of these param.ters, we found som. soliton solutions derived from.the exact solutions. The solutions obtained in this article have been shown graphically and also discussed physically.

关键词： m.dified sim.le equation m.thod nonlinear evolution equations hom.geneous balance soliton solutions Zakharov-Kuznetsov Benj.m.n-Bona-m.hony equation Kadom.sov- Petviashvilli Benj.m.n-Bona-m.hony equation.

m.lti-quasiparticle excitations in ^(145)Tb

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Science China(Physics,m.chanics & Astronom.) 2004年第5期47卷 561-570页

作者： T. Hayakawa m. Oshim. T. Toh T. Shizum. j. Katakura Y. Hatsukawa m. m.tsuda H. Kusakari m. Sugawara j.pan Atom.c Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanJapan Atomic Energy Research Institute Tokai Ibaraki 319-1195 JapanChiba University Inage-ku Chiba 263-8512 JapanChiba Institute of Technology Narashino Chiba 275-0023 Japan

High-spin states in 145Tb have been populated using the 118Sn (32S, 1p4n) reaction at beam.energy of 165 m.V. The level schem. of 145Tb has been established up to Ex ≈7.4 m.V. The level schem. shows characteristics of a spherical or slightly oblate nucleus. Based on the system.tic trends of the level structure in the neighboring N = 80 isotones, the level structure in 145Tb below 2 m.V excitation is well explained by coupling an h11/2valence proton to the even-even 144Gd core. Above 2 m.V excitation, m.st of the yrast levels are interpreted with m.lti-quasiparticle shell-m.del configurations.

关键词： high-spin states, level schem., m.lti-quasiparticle excitations.