C60量子点与磁性电极的耦合

在磁电子学领域，自旋极化输运与分子器件的结合是一个热门研究方向．最近，来自美国康奈尔大学的Pasupathy等，采用纳米加工技术，将单个C60分子吸附在一对Ni电极之间，构成了“铁磁电极-C60量子点”器件．量子点的Kondo效应和铁磁性交换耦合，原本是相互排斥的，在Pasupathy的实验中，两者被首次结合在一个器件中并加以观察．研究结果表明，如果器件的质量能够保证两种效应之间的竞争得到有效控制，     

工科数学教学中数学建模技术的嵌入式教学法

本介绍了在工科数学教育中引入数学建模技术的教学方法，教学组织及教学案例，是多年工科数学教学的经验总结。     

Damage and fracture evaluation of granular composite materials by digital image correlation method

This paper presents the applications of digital image correlation technique to the mesoscopic damage and fracture study of some granular based composite materials including steelfiber reinforced concrete, sandstone and crystal-polymer composite. The deformation fields of the composite materials resulted from stress localization were obtained by the correlation computation of the surface images with loading steps and thus the related damage prediction and fracture parameters were evaluated. The correlation searching could be performed either directly based on the gray levels of the digital images or from the wavelet transform (WT) coefficients of the transform spectrum. The latter was developed by the authors and showed higher resolution and sensitivity to the singularity detection. Because the displacement components came from the rough surfaces of the composite materials without any coats of gratings or fringes of optical interferometry, both surface profiles and the deformation fields of the composites were visualized which was helpful to compare each other to analyze the damage of those heterogeneous materials. The project supported by the National Natural Science Foundation of China (10125211 and 10072002), the Scientific Committee of Yunnan Province for the Program of Steel Fiber Reinforced Concrete, and the Institute of Chemical Materials, CAEP at Mianyang     

电磁诱导透明和导致极慢光速的机制

根据有关文献 ,描述了电磁诱导透明和导致光速极慢的物理机制 ,并对实验结果也做了介绍     

“2003年水声综合技术交流会”将于8月在四川雅安市召开

与时俱进、三阳开泰,我们迎来了2003年。在新的一年内水声行业为我国海军水声装备现代化建设担负着光荣的历史使命,同时要承前启后,鼓励和培养青年水声科技工作者尽快成才,挑起水声科学赶上和超过世界先进水平的重任。为此,中国造船工程学会船舶仪器仪表学术委员会、中国仪器仪表学会船舶仪器仪表分会、中国造船工程学会电子学术委员会水中探测学组、中国国防网站联合会水声专业网等学术团体联合召开“2003年水声综合技术交流会”,为我国水声科技工作者提供一个交流科研创新、科研攻关和科研新成果的学术舞台,热忱欢迎水声科技人员特别是     

Excited Stated in ^207Rn

Excited states ^207Rn are investigated via the^196Pt(^16O,Sn)^207 Rn reaction at beam energies from 85 to 95 MeV using techniques of in-beam γ-ray spectroscopy.Measurements of γ-ray excitation function,x-γ and γ-γ-t conincidences are performed with ten BGO(AC) HPGe detectors.Based on these measurements,a level scheme of ^207Rn,including 17 γ-rays and 18 levels,is established.Spins for most of the levels are proposed according to the measured DCO ratios.The level struccture is compared with a weak-coupling calculation using the interaction energies extracted from neighbouring nuclei.     

基于Web的ICF物理实验数据查询系统

随着“神光”-Ⅱ的运行和“神光”-Ⅲ原型的即将建成，物理实验数据、实验参数以及各探测器的实验记录也将越来越多。为了方便物理实验人员对实验数据进行后续处理，必须建立有效的数据管理和查询系统。系统建立的ICF物理实验数据查询系统，实现了对实验参数和数据有效的管理和利用，该系统应用计算机网络技术及数据库技术，并用Web网页浏览的方式．以方便相关物理实验人员对实验参数和实验数据的查询和调用，即时全面了解实验状况，从而有利于对实验数据进行分析，指导下一步的具体实验。     

现代教育技术在物理教学中的应用

现代教育技术与课程教学的整合,是我国面向21世纪基础教育教学改革的新视点。笔者就物理教学中应用现代教育技术的实践作初步探讨。     

低功率密度激光驱动的类镍钽X射线激光

“水窗”附近的X射线激光对于生物全息和成像方面的研究有着独特的优点和价值，因此倍受重视。特别是波长位于“水窗”外沿的4．48nm的类镍钽X射线激光更是进行生物全息研究最合适的工具之一。但是，波长越短的激光，其产生的条件也就越苛刻。一般只有采用非常大规模的激光装置才有可能获得一定强度的输出。对于类镍钽X射线激光来说，20世纪90年代，LLNL利用数千焦耳能量的激光驱动，获得了GL≈8的输出；2002年，在“神光”-Ⅱ激光装置上利用基频、倍频联合驱动的方式，以不足400J的驱动激光，获得了GL≈5．5的好结果。但是要以同样方式获得更好的结果，却受到了器件的限制。     

Measurements of Boundary Plasma in Synergy Discharges of IBW and LHCD on the HT-7 Tokamak

By applying ion Bernstein wave (IBW) heating into the lower hybrid current drive (LHCD) plasma, improved confinements have been obtained in the HT-7 tokamak. The central electron temperature was doubled and the storage energy was increased significantly. The core electron density and temperature were broadened and ther profiles near the edge were steepened. A transport barrier has been formed in the vicinity of the limlter radial location. An enhanced shear in poloidal phase velocity was found in the same region with reduction of the fluctuation levels and the coherences between fluctuations. The results suggest that the improved confinement in the IBW and LHCD plasma is at least partially due to the modification of shear in poloidal velocity and then the suppression of fluctuations and fluctuation induced fluxes via de-correlation effect.