检索结果-南通市图书馆

Chinese Physics Letters 2005年第1期22卷 69-71页

作者： F.N.Khattak E.u.Khan TabassumNasir J.J.Baluch F.u.Khan u.W.C. GomalUniversityDeraIsmailKhanPakistan RadiationPhysicsDivision PINSTECHNiloreIslamabadPakistan DepartmentofPhysics GomalUniversityDeraIsmailKhanPakistan

Two detector materials mica and cellulose-nitrate(CN)-85 have been used to study (14.0MeV/u) Pb + Pb reaction. Events of different multiplicities were registered in mica and CN-85 detectors using the 2π-geometry technique of solid state nuclear track detection. After removing the target material from the detectors the damaged trails in the detectors were revealed as tracks by proper chemical etching. The irradiated area of each sample was scanned and events of different multiplicities were traced. The binary events were bifurcated into elastic and inelastic events. The elastic binary events and three prong events, observed in the reaction, have been used to search out coefficients Cμν in the presence of both the detectors, for the reaction under study. using these coefficients 3- and 4-prong events have been analysed. From the detailed analysis of the results of (14.0MeV/u) Pb+Pb reaction, obtained from mica and CN-85 track detectors we observed a great resemblance of results obtained from the two detectors. Combining the results of both the detectors, we report some important outcomes.

关键词： CN-85轨迹探测器高能物理学铅原子碰撞反应固态

u. S. Academic Medical Centers under the Managed Health Care Environment

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 1999年第2期12卷 81-87页

作者： KRISTINA GuO (School of Policy and Managment, Florida International university,North Miami, FL 33181, u. S. A.) Florida International university 美国

This research investigates the impact of managed health care on academic medical centers in the united States. Academic medical centers hold a unique position in the u. S. health care system through their missions of conducting cutting-edge biomedical researeh, pursuing clinical and technological innovations, Providing state-of-the-art medical care and producing highly qualified health professionals. However, policies to control costs through the use of managed care and limiting resources are detrimental to academic medical centers and impede the advancement of medical sciTo survive the threats of managed care in the health care environment, acadendc medical centers must rely on their upper level managers to derive successful strategies. The methods used in this study include qualitative approaches in the form of key informants and case studies. In addition, a survey questionnaire was sent to 1h8 CEOs in all the academic medical centers in the u. S. The findings revealed that managers who perform the liaison, monitor, entrepreneur and resource allocator roles are crucial to ensure the survival of academic medical centers, so that academic medical centers can continue their missions to serve the general public and promote their well-being.

关键词： Academic Medical Centers Cost Control Health Policy Humans Managed Care Programs Organizational Innovation united States

Cross Section of Heavy Ion Reaction （14.5 MeV/u） ^132Xe ＋ Bi

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2006年第3期23卷 572-575页

作者： G. Sher M.I. Shahzad M. Hussain M. A. Rana E. u. Khan Physics Research Division PINSTECH P.O Nilore Islamabad Pakistan Department of Physics University of the Punjab Lahore Pakistan

We investigate the cross section of the heavy ion reaction （14.5 MeV/u） ^132Xe ＋ Bi by using a CR-39 plastic track detector. The target-detector assembly is exposed at uNILAC beam facility of GSI, Germany. After etching under appropriate etching conditions, the detector is scanned for multipronged events produced as a result of interactions of projectile ions with target atoms. The elastic events are separated from binary events and used for the determination of the quarter-point angle. The quarter-point angle obtained is used to determine the total reaction cross section. The total experimental reaction cross section is determined by using statistics of inelastic events of two-pronged and higher multiplicity events. The experimental reaction cross sections determined by using elastic and inelastic data observed in the reaction under study are found to be in good agreement with the theoretically calculated value of reaction cross section using a sharp cutoff model.

关键词： SEQuENTIAL FISSION COuLOMB BARRIER TRACK DETECTORS NuCLEAR SCATTERING PB-208

新疆西南天山木扎尔特河一带低压泥质麻粒岩岩石学特征、独居石u-Th-Pb定年及其地质意义

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

岩石学报 2009年第9期25卷 2271-2280页

作者：苟龙龙张立飞 G0u Peking univ Key Lab Orogen Belts & Crustal Evolut Minist Educ Sch Earth & Space Sci Beijing 100871 Peoples R China

古南天山洋闭合过程中,由于洋壳俯冲产生的岛弧岩浆作用加热大陆地壳,在新疆西南天山木扎尔特一带形成了一套低压高温泥质麻粒岩相变质岩石。本文用Theriak-Domino热力学软件对该套岩石中的堇青石榴夕线石黑云母片麻岩和含夕线石堇青石... 详细信息

古南天山洋闭合过程中,由于洋壳俯冲产生的岛弧岩浆作用加热大陆地壳,在新疆西南天山木扎尔特一带形成了一套低压高温泥质麻粒岩相变质岩石。本文用Theriak-Domino热力学软件对该套岩石中的堇青石榴夕线石黑云母片麻岩和含夕线石堇青石榴黑云母片麻岩进行了岩石学相平衡计算研究,得到它们峰期变质的温压条件分别是:T=630～674℃,P=5.2～5.5kbar和T=645～684℃,P=5.4～5.7kbar。并采用独居石Th-u-Pb电子探针定年方法,对样品WQ006中的3颗独居石进行了原位年龄测定(38个分析点),得到2组等时线年龄,分别是376±8Ma和280±8Ma(2σ)。结合独居石的岩相学特征,提出了新疆西南天山低压高温麻粒岩相峰期变质作用的时代为280±8Ma,而376±8Ma(2σ)可能为原沉积岩的原岩/成岩年龄。表明西南天山洋壳开始俯冲发生在晚古生代,进一步证明了西南天山造山带俯冲碰撞发生在晚二叠纪之后的观点。

关键词：新疆西南天山木扎尔特低压泥质麻粒岩相岩石学特征独居石定年地质意义 southwestern Tianshan region monazite dating China South Tianshan 黑云母片麻岩 electron microprobe 南天山洋峰期变质 phase equilibria

INTERMETALLIC ALLOYS AND COMPOSITES FOR THE 21ST CENTuRY: A BASIC ENERGY SCIENCES PROGRAM OF THE u. S. DEPARTMENT OF ENERGY

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1999年第S1期9卷 355-363页

作者： Alan L. Dragoo Division of Materials Sciences, Office of Basic Energy Sciences, u.S.Department of Energy, Germantown, MD 2087-1290, u.S.A.

Progress has been made in intermetallic alloys over the past decade and a half, but intermetallics remain a relatively unexplored class of materials for energy applications. Hence, they offer considerable opportunities both for scientific research on fundamental structural property processing relationships and for technological development. The Department of Energy supports a program of scientific research on intermetallic alloys such as the nickel and iron aluminides and is establishing new research efforts in silicides and Laves phases through the program of the Division of Materials Sciences, of the Office of Basic Energy Sciences. Areas of research include theory and materials simulation, microalloying, high resolution sudies of structure and composition, mechanical properties, point defects and dislocation mechanics, phase transformations, and processing. Research is conducted through programs at the Department of Energy National Laboratories and through grants to academic and industrial *** results from Division of Materials Sciences programs have provided the basis and transportation. In addition, a cooperative effort between research groups has been established as a project on intermetallic materials under the Center of Excellence in Synthesis and Processing of Advanced Materials.

关键词： intermetallics energy applications nickel aluminides iron aluminides silicides Laves phases

u.S. Department of Energy Research in Intermetallic Alloys and Composites

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1995年第Z1期8卷 615-624页

作者： Alan L. Dragoo (Division of Materials Sciences Office of Basic Energy Sciences u.S.Department of Energy Washington, D.C.20585) u.S.A.

The program of the Division of Materials Sciences *** materials will be surveyed. This program is carried out at Department of Energy National Laboratories and at u.S. universities. Areas of research include theory and material simulation, microalloying, high resolution studies of structure and composition, mechanical properties, point defects and dislocation mechanics, phase transformations, and processing. Finally, general considerations will be discussed for the future program.

关键词： Department of Energy Research in Intermetallic Alloys and Composites

JT-60u装置温度分布剖面不变性的实验研究

在线全文

学校读者我要写书评

暂无评论

核聚变与等离子体物理 2002年第3期22卷 158-162页

作者：崔正英 JT60u装置实验组核工业西南物理研究院成都610041 日本原子能研究所

在一系列H模放电条件下 ,建立了一个旨在研究等离子体温度分布剖面不变性的数据库。介绍了数据库建立过程中要解决的关键问题和所用软件 ,对等离子体温度分布剖面不变性及芯部约束与边缘参数的关系进行了研究。

关键词： JT-60u装置温度分布剖面不变性实验研究等离子体约束数据库托卡马克装置

СШИВАНИЕ ПОЛИЭТИЛЕНА ПОД ДЕЙСТВИЕМ УЛЬТРАФИОЛЕТОВОΓО СВЕТА В ПРИСУТСТВИИ СЕНСИБИЛИЗАТОРА ——Кuнеmuка nроuесов,харакmерных ауmосвеmо uльmрую

在线全文

学校读者我要写书评

暂无评论

Science in China,Ser.A 1962年第11期 1513-1526页

作者：钱保功姜炳政廖玉珍梁映秋王霞瑜范垂昌 Инсmumуm nрuкано хumuu АН Кumая Хumuческu акуbmеm Γuрuнскоо унuерсumеmа

A two-configuration study on the photodetachment cross-section for the 3σ_u channel of F_2^-

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 1997年第4期40卷 432-435页

作者：孙卫国 R.M. Pitzer C.W. McCurdyLawrence Livermore National Laboratory P.O.Box 5509 L-561 Livermore CA 94550 u.S.A. Department of Applied Chemistry Sichuan Union University Chengdu 610065 China Department of Chemistry Ohio State University Columbus Ohio 43210 U.S.A.

An unusual resonance feature of the photodetachment cross-section for the 3σu channel of F2- observed in the early static-exchange study is confirmed by using correlated target (F2) wavefunctions determined by configuration interaction (CI). The magnitude of the cross-sections is lowered from that in earlier calculation by the potential of the correlated target.

关键词： resonance cross-section photodetachment configuration-interaction.x

核聚变实验装置HT-7u停机辐射剂量率三维计算与分析

在线全文

学校读者我要写书评

暂无评论

核科学与工程 2004年第1期24卷 49-55页

作者：陈义学吴宜灿黄群英 Fischer u 中国科学院等离子体物理研究所安徽合肥230031 Forschungszentrum Karlsrube Germany

在基于三维蒙特卡罗方法的聚变装置停机剂量率计算方法“严格两步法”(R2S)的基础上,首先建立了核聚变托卡马克实验装置HT-7u三维精确模型,然后对HT-7u各种D-D放电模式下的停机剂量率进行了详细的三维计算与分析,从而为装置实验方案及... 详细信息

在基于三维蒙特卡罗方法的聚变装置停机剂量率计算方法“严格两步法”(R2S)的基础上,首先建立了核聚变托卡马克实验装置HT-7u三维精确模型,然后对HT-7u各种D-D放电模式下的停机剂量率进行了详细的三维计算与分析,从而为装置实验方案及实验维修人员的安全操作规程的制定提供了理论基础,也对装置的辐射防护问题具有参考价值。

关键词：核聚变装置停机剂量率严格两步法蒙特卡罗法托卡马克实验装置辐射防护