检索结果-南通市图书馆

Open Journal of Biophysics 2017年第2期7卷 59-69页

作者： Konin E. Jean Michel Yale pavel Megnassan Eugene Michel A. Kouacou Jeremie t. Zoueu Laboratoire d’Instrumentation Image et Spectroscopie UMRI EEA INP-HB Yamoussoukro Cote d’Ivoire Laboratoire de Physique Fondamentale et Appliquée UNA Abidjan Cote d’Ivoire

In recent years, extensive research has been carried out on red blood cells in order to investigate their mechanical properties. the interest in these studies has been possible thanks to the technological innovations made in the field of micro or nano manipulation of biological and non-biological particles without physical contact. In the present project, we have developed a new approach to study the deformation of red blood cells moving against a trapped microbead by applying a sinusoidal voltage (DC offset 3.5 Vpp) to the stage at 0.4 Hz frequencies. the oscillating movement imposed on the stage highlights the indentation test and the tensile test known for the study of mechanical behavior of materials. the mechanical properties found are: the modulus of elasticity (Young Modulus), the shear modulus, the coefficient of hardening and erythrocyte resistance coefficient. the axial shear modulus 25.00 ± 1.5 μN/m and the transversal shear modulus 15.7 ± 4.63 μN/m were compared to those in the literature. these values were respectively determined by Hooke’s law and the Hertz model.

关键词： Optical tweezers Elasticity Mechanical Properties tensile Indentation

Costs and Benefits of Smart Grids on Liberalized Markets

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Electronic Science and technology 2012年第1期10卷 22-28页

作者： Marek Adamec pavel Pavlatka Oldrich Stary Department of Economics Management and HumanitiesCzech Technical University in PragueZikova 4166 29 Prague 6Czech Republic

the discussion about smart grid （SG） implementation is mostly focused on pilot projects. these projects are necessary for mapping of particular technical devices of advanced metering management （AMM） which is needed for successful SG and whole functional SG system operation. According to our opinion, for the next step of SG implementation, the participation of effective market design would be quite necessary. In other words, pilot project which is operated regardless to the market conditions and special SG tariff is incomplete and could be irrelevant for further evaluation of feasibility. With regard to above mentioned facts, the detailed cost-benefit-analysis （CBA） is needed to establish the correct methodology for evaluation of SG implementation effectiveness. Related aspects are mentioned and discussed in this paper, in which the particular cost and benefits as well as feedback that occurs as the reaction on implementation are summarized and quantified.

关键词： Advanced metering management,electricity market regulation smart grid system approach.

A novel multi-shot target platform for laser-driven laboratory astrophysics experiments

在线全文

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2023年第2期11卷 11-19页

作者： Pablo Perez-Martin Irene Prencipe Manfred Sobiella Fabian Donat Ning Kang Zhiyu He Huiya Liu Lei Ren Zhiyong Xie Jun Xiong Yan Zhang Florian-Emanuel Brack MichalČervenák pavel Gajdoš Lenka Hronová Kakolee Kaniz Michaela Kozlová Florian Kroll Xiayun Pan Gabriel Schaumann Sushil Singh MichalŠmíd Francisco Suzuki-Vidal Panzheng Zhang Jinren Sun Jianqiang Zhu Miroslav Krůs Katerina Falk Helmholtz-Zentrum Dresden-Rossendorf Institute of Radiation PhysicsDresdenGermany technische Universität Dresden DresdenGermany Key Laboratory of High Power Laser and Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina Shanghai Institute of Laser Plasma China Academy of Engineering PhysicsShanghaiChina Institute of Plasma Physics Czech Academy of SciencesPragueCzech Republic Czech technical University Faculty of Nuclear Sciences and Physical EngineeringPragueCzech Republic Department of Physics Jagannath UniversityDhakaBangladesh ELI-Beamlines Institute of PhysicsCzech Academy of SciencesPragueCzech Republic Institute for Nuclear Physics Technical University of DarmstadtDarmstadtGermany Institute of Physics Czech Academy of SciencesPragueCzech Republic Blackett Laboratory Imperial CollegeLondonUnited Kingdom First Light Fusion Oxford Industrial ParkYarntonOxfordUnited Kingdom

A new approach to target development for laboratory astrophysics experiments at high-power laser facilities is *** the dawn of high-power lasers,laboratory astrophysics has emerged as a field,bringing insight into physical processes in astrophysical objects,such as the formation of *** important factor for success in these experiments is *** date,targets have mainly relied on expensive and challenging microfabrication *** design presented incorporates replaceable machined parts that assemble into a structure that defines the experimental *** can make targets cheaper and faster to manufacture,while maintaining robustness and *** platform is intended for experiments on plasma flows,but it is flexible and may be adapted to the constraints of other experimental *** of targets used in experimental campaigns are shown,including a design for insertion in a high magnetic field *** results are included,demonstrating the performance of the targets.

关键词： high magnetic fields laboratory astrophysics laser-plasma interaction magnetized plasmas target design

Split-dose or hybrid nonsteroidal anti-inflammatory drugs and Nacetylcysteine therapy for prevention of post-retrograde cholangiopancreatography pancreatitis

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2019年第3期7卷 300-310页

作者： Laura pavel Gheorghe Gh Balan Alexandra Nicorescu Georgiana Emmanuela Gilca-Blanariu Catalin Sfarti Stefan Chiriac Smaranda Diaconescu Vasile Liviu Drug Gheorghe Balan Gabriela Stefanescu Gastroenterology "Grigore T.Popa" University of Medicine and Pharmacy Endocrinology "Grigore T. Popa" University of Medicine and Pharmacy Department of Mother and Child Medicine "Grigore T. Popa" University of Medicine and Pharmacy

BACKGROUND Despite significant technical and training improvements, the incidence of postendoscopic retrograde cholangiopancreatography(ERCP) pancreatitis(PEP) has not significantly dropped. Although many studies have evaluated the efficacy of various agents, e.g. nonsteroidal anti-inflammatory drugs, octreotide,antioxidants, administered via various dosages, routes(oral, intrarectal or parenteral), and schedules(before or after the procedure), the results have been *** to evaluate efficacy of three pharmacologic prophylactic methods for prevention of *** In this prospective, single-center randomized trial, patients who underwent firsttime ERCP for choledocholithiasis were randomly assigned to three groups. the first group received 600 mg N-acetylcysteine 15 min prior to ERCP, and perrectum administration of 50 mg indomethacin both prior to and after completion of the ERCP. the second group was administered only the 50 mg indomethacin per-rectum both prior to and after the ERCP. the third group was administeredper-rectum 100 mg indomethacin only after the ERCP, representing the control group given the guideline-recommended regimen. the primary end-point was PEP *** Among the total 211 patients evaluated during the study, 186 fulfilled the inclusion criteria and completed the protocol. the percentages of patients who developed PEP in each of the three groups were not significantly different(χ2 =2.793, P = 0.247). Among the acute PEP cases, for all groups, 14 patients developed mild pancreatitis(77.77%) and 4 moderate. No severe cases of PEP occurred, and in all PEP cases the resolution was favorable. No adverse events related to the medications(digestive hemorrhage, rectal irritation, or allergies)*** the efficacies of split-dose indomethacin and combined administration(Nacetylcysteine with indomethacin) for preventing PEP were similar to that of the standard regimen.

关键词： Endoscopic retrograde cholangiopancreatography Prophylaxis Postendoscopic retrograde cholangiopancreatography pancreatitis Nonsteroidal antiinflammatory drugs N-acetylcysteine

Hollow dimension of modules

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2005年第10期6卷 1055-1057页

作者： ORHAN Nil KESKiN tütüNCü Derya Department of Mathematics University of HacettepeBeytepe 06532 AnkaraTurkeyDepartment of Mathematics University of Hacettepe Beytepe 06532 AnkaraTurkey

In this paper, we are interested in the following general question: Given a module M which has finite hollow dimen-sion and which has a finite collection of submodules Ki (1≤i≤n) such that M=K1+...+kn, can we find an expression for the hollow dimension of M in terms of hollow dimensions of modules built up in some way from K1,...,kn? We prove the following theorem: Let M be an amply supplemented module having finite hollow dimension and let Ki (1≤i≤n) be a finite collection of submodules of M such that M=K1+...+kn. then the hollow dimension h(M) of M is the sum of the hollow dimensions of Ki (1≤i≤n) if and only if Ki is a supplement of K1+...+Ki?1+Ki+1+...+kn in M for each 1≤i≤n.

关键词：补遗子模空间表达空间模数空间分析

在线全文

学校读者我要写书评

暂无评论

专有名词学视野下粟特人的万神殿

丝绸之路研究集刊

丝绸之路研究集刊 2022年第2期 445-462,535页

作者：卢湃沙俄罗斯国立艾尔米塔什博物馆

本文试图分析在现存古文书中粟特人的名字,从而推动对粟特宗教的研究。在对基本的个人信息,关于其来源、众神的形象以及研究方法的论述之后,对几组名称展开进一步研究调查:阿胡拉·马兹达以及马赫拉斯坎德;“更年轻的阿维斯塔”众神;不... 详细信息

本文试图分析在现存古文书中粟特人的名字,从而推动对粟特宗教的研究。在对基本的个人信息,关于其来源、众神的形象以及研究方法的论述之后,对几组名称展开进一步研究调查:阿胡拉·马兹达以及马赫拉斯坎德;“更年轻的阿维斯塔”众神;不见于琐罗亚斯德教记载的伊朗神;域外众神、英雄以及一些宗教概念;重大事件甚至恶魔等组成。在掌握了以上的材料之后,笔者得出一些结论,分别从琐罗亚斯德教首席众神的一些艺术形象;粟特人人名词源中的外来尊神;从专有名词词源学角度看众神和英雄们的功能;粟特本土众神的相似与不同,在巴克特里亚以及花剌子模;众神的名字在文书中被翻译成外来的神的变化;从纪念性艺术到人名的粟特文化不同媒介所表现的天国之间的巨大差异。

关键词：琐罗亚斯德教巴克特里亚粟特人花剌子模神的形象众神专有名词词源学

Etiology and functional status of liver cirrhosis by ^(31)P MR spectroscopy

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2005年第44期11卷 6926-6931页

作者： Monika Dezortova pavel taimr Antonin Skoch Julius Spicak Milan Hajek MR Unit Institute for Clinical and Experimental Medicine Prague Czech Republic Department of Hepatogastroenterology Institute for Clinical and Experimental Medicine

AIM: to assess the functional status and etiology of liver cirrhosis by quantitative 31p magnetic resonance spectroscopy (MRS).MEtHODS: A total of 80 patients with liver cirrhosis of different etiology and functional status described by Child-Pugh score were examined and compared to 11 healthy volunteers. MR examination was performed on a 1.5 t imager using a 1H/31P surface coil by the 2D chemical shift imaging *** concentrations of phosphomonoesters (PME),phosphodiesters (PDE), inorganic phosphate (Pi) and adenosine triphosphate (AtP) were ***: MRS changes reflected the degree of liver dysfunction in all the patients as well as in individual etiological groups. the most important change was a decrease of PDE. It was possible to distinguish alcoholic,viral and cholestatic etiologies based on MR *** and viral etiology differed in PDE (alcoholic,viral, controls: 6.5±2.3, 6.5±3.1, 10.8±2.7 mmol/L,P＜0.001) and AtP (alcoholic, viral, controls: 2.9±0.8, 2.8±0.9, 3.7±1.0 mmol/L, P＜0.01) from the control *** viral etiology, patients with alcoholic etiology also differed in Pi (alcoholic, controls: 1.2±0.4, 1.6±0.6mmol/L, P＜0.05) from controls. No significant changes were found in patients with cholestatic disease and controls; nevertheless, this group differed from both alcoholic and viral groups (cholestatic, alcoholic, viral: 9.4±2.7, 6.5±2.3, 6.5±3.1 mmol/L, P＜0.005) in ***: 31p MRS can significantly help in noninvasive separation of different etiological groups leading to liver cirrhosis. In addition, MRS changes reflect functional liver injury.

关键词：病原学肝硬化 MR 光谱学

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

海洋负排放的生态工程方案

Science Bulletin 2022年第24期67卷 2564-2573,M0004页

作者：张传伦石拓刘纪化贺志理 Helmuth thomas 董海良 Buki Rinkevich 王誉泽 Jung-Ho Hyun Markus Weinbauer Celeste López-Abbate 屠奇超谢树成 Youhei Yamashita pavel tishchenko 陈泉睿张锐焦念志 Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Shenzhen Key Laboratory of Marine Geo-Omics Research Southern University of Science and TechnologyShenzhen 518055China Institute of Marine Science and technology Shandong UniversityQingdao 266237China Environmental Microbiomics Research Center School of Environmental Science and EngineeringSouthern Marine Science and Engineering Guangdong LaboratorySun Yat-sen UniversityZhuhai 510006China Helmholtz-Center Hereon Institute of Carbon CyclesGeesthacht D-21502Germany Center for Geomicrobiology and Biogeochemistry Research State Key Laboratory of Biogeology and Environmental GeologyChina University of GeosciencesBeijing 100083China Israel Oceanographic&Limnological Research National Institute of OceanographyHaifa Tel Shikmona 3109701Israel Department of Ocean Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Marine Science and Convergence Engineering Hanyang University ERICA CampusAnsanGyeonggi-do 15588South Korea Laboratoire d’Océanographie de Villefranche(LOV) Sorbonne Université-CNRS UMR7093Institut de la Mer de Villefranche(IMEV)Villefranche BP28France Instituto Argentino de Oceanografía Consejo Nacional de Investigaciones Científicas y TécnicasBahía Blanca 8000Argentina State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesWuhan 430074China Faculty of Environmental Earth Science Hokkaido UniversityHokkaido 060-0810Japan V.I.Il’ichev Pacific Oceanological Institute Far Eastern BranchRussian Academy of SciencesVladivostok 690041Russia State Key Laboratory of Marine Environmental Science Institute of Marine Microbes and EcospheresCollege of Ocean and Earth SciencesXiamen UniversityXiamen 361102China

在未来30~40年内实现“碳中和”目标已成世界范围内共识,但亟需全人类共同努力以应对日益严重的气候变化威胁.实现这一宏伟目标的基本途径,一是减少人为向大气排放的二氧化碳,二是增加碳汇或负排放,即从大气中去除二氧化碳.本文提出海... 详细信息

在未来30~40年内实现“碳中和”目标已成世界范围内共识,但亟需全人类共同努力以应对日益严重的气候变化威胁.实现这一宏伟目标的基本途径,一是减少人为向大气排放的二氧化碳,二是增加碳汇或负排放,即从大气中去除二氧化碳.本文提出海洋负排放的生态工程方案,旨在呼吁加强利用海洋环境中的碳汇潜力,同时倡议建立一个多国共同参与的国际大科学计划,以促进海洋负排放相关技术途径与实施方案的研发,综合考虑驱动不同形式碳汇(无机/有机、生物/非生物、颗粒态/溶解态)的生态与生物地球化学过程和机制.本文重点关注旨在揭示生物泵(BP)、微型生物碳泵(MCP)、微生物诱导碳酸盐沉积(MICP)之间相互作用的变革性机制研究,特别是提高富营养化河口、低氧和缺氧水域、珊瑚礁生态系统以及水产养殖区的碳汇潜能.海洋负排放生态工程对实现碳汇并减轻环境压力具有重要意义.

关键词：碳酸盐沉积大气排放变革性海洋环境环境压力非生物水产养殖区碳中和

Molecular Dynamics Simulations of Perovskites: the Effect of Potential Function Representation on Equilibrium Structural Properties

在线全文

学校读者我要写书评

暂无评论

Open Journal of Physical Chemistry 2015年第4期5卷 110-121页

作者： Kholmirzo t. Kholmurodov Sagille A. Ibragimova pavel P. Gladishev Anatoly V. Vannikov Alexey R. tameev tatyana Yu. Zelenyak Frank Laboratory of Neutron Physics JINR Dubna Russia Dubna International University Dubna Russia A.N. Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences Moscow Russia

the perovskites with general formula ABX3 have been widely used as for materials with their unique properties (ferroelectric, piezoelectric, dielectric, catalytic and so on). Hybrid organolead halide perovskites are a class of semiconductors with ABX3 (X = Cl, Br, and I) structures consisting of lead cations in 6-fold coordination (B site), surrounded by an octahedron of halide anions (X site, face centered) together with the organic components in 12-fold cub octahedral coordination. these hybrid perovskites have a direct band gap, a large absorption coefficient as well as high charge carrier mobility that represent a very attractive characteristic of cost-effective solar cells. Basically, these crystals are inorganic solids of CatiO3 type held together by bonds that are either ionic or partially ionic and partially covalent. In spite of the partially covalent character of the ti-O bond, the system is modeled by a two-body central force interatomic potential (the form of the Vashishta and Rahman interatomic potential), which has been used successfully for many materials with a perovskite structure. In the present work using molecular dynamics (MD) simulation method we investigate the dynamical and structural behavior of CatiO3 perovskite at normal pressure and temperature conditions. the MD calculations were performed on a system of 16,000 particles (3200Ca + 3200ti + 96,00O), initially in an orthorhombic-Pbnm structure. the orthorhombic MD box had edges Lx = 53.4 Å, Ly = 53.4 Å and Lz = 61.12 Å, which provided a density matching the experimental value of ρ = 4 g/cm3. Starting with this structure and using proposed interatomic potentials the MD system stabilizes at room temperature in its initial configuration. the aim of the present study to explore the effect of potential function representations on structural equilibrium properties for the perovskite models including hybrid halide ones outlined above. Concerning the perovskite equilibrium state we

关键词： Perovskites Halides Potential Functions Structural Properties MD Simulations