Structure evolution along the yrast-line in Pd-101

High-spin states in Pd-101 have been investigated experimentally via the Ge-76(Si-28, 3n gamma)Pd-101 reaction. The previously known bands based on the d(5/2) and h(11/2) neutron orbitals have been extended to higher-spin states, and two new structures have been observed. Spin and parity were assigned to the levels on the basis of the experimental results of the angular distribution of gamma rays deexciting the oriented states. For the ground-state band, the E-GOS (E-Gamma Over Spin) curve strongly suggests a structure transition from vibration to rotation while increasing spin.

The W-11-4A platform comprehensive strength monitoring system

A comprehensive strength monitoring system used on a fixed jacket platform is presented in this paper. The long-term monitoring of W-11-4A platform achieved. Structural responses (strain and acceleration) at selected locations, as well as associated environmental parameters, have been obtained. The emphasis of the paper is placed on the system design, and the instrumentation and operation methodology employed in the monitoring of the structural responses. The performance of the system and the characteristic results obtained during its 13-month operation are also summarized.

涠11-4平台结构动态响应监测结果分析(涠11-4平台原位监测研究之二)

本文总结了针对涠１１－４平台一年多时间的应变和加速度监测数据的处理分析工作，详细介绍了所用的数据处理方法，给出了应变数据的统计结果及长期分布规律。通过对应变和加速度信号进行频谱分析，揭示了平台在多种环境条件下的振动特性。

涠11-4平台综合强度监测技术及实施运行系统(涠11-4平台结构原位监测研究之一)

本文介绍了一种固定式导管架平台综合强度监测系统，它用于对涠１１－４平台关键部位的应力、加速度及与结构响应相关的环境参数进行长期监测。讨论的重点内容是结构响应的测量方案、设备及实施方法，并对运行结果作了说明

Molecular dynamics studies on the local disordering of σ3 and σ11 grain boundaries in aluminium bicrystal

Molecular dynamics (MD) simulations using Morse interaction potential are performed in studies of [110] symmetrical tilt grain boundary (GB) structures with mis-orientation angles 50.5 degrees(Sigma 11), 129.5 degrees(Sigma 11), 70.5 degrees(Sigma 3) and 109.5 degrees(Sigma 3) at various tempratures. The GB structures are found to start local disordering at about 0.5T(m)(T-m is the melting point of aluminium) for 50.5 degrees(Sigma 11), 0.32T(m) for 129.5 degrees(Sigma 11) and 0.38T(m) for 70.5 degrees(Sigma 3), respectively. These results agree with conclusions deduced from the anelastic measurements. But, for twin-boundary structure 109.5 degrees(Sigma 3), this disordering has not been found even when temperature increases up to 0.9T(m).

TiC原位增强块状Cu_(47)Ti_(34)Zr_(11)Ni_8非晶合金复合材料

在电弧炉中利用吸铸法制备了直径1-4 mm的原位生成TiC和β-Ti枝晶联合增强的块状Cu47Ti34Zr11Ni8非晶合金复合材料.DSC热分析结果表明,原位生成TiC颗粒的引入,没有影响基体合金的非晶形成能力.用OM,XRD,SEM,EDS等方法研究了复合材料的相组成、微观组织以及成分分布,结果表明,TiC颗粒作为异质形核中心促进了β-Ti枝晶的形成,形成了TiC颗粒和β-Ti枝晶联合增强的块状Cu47Ti34Zr11Ni8非晶合金复合材料,而且β-Ti枝晶的尺寸和数量与TiC颗粒的多少以及试样的尺寸有关.室温压缩试验表明,同单相非晶合金相比,块状Cu47Ti34Zr11Ni8非晶合金复合材料提高了抗压强度及塑性.

第11届国际快淬和亚稳材料会议简介

第11届国际快淬和亚稳材料会议于2002年8月24~30日在英国牛津大学召开，本次会议由牛津大学材料系承办． 200多名来自欧洲、美国、加拿大、日本、韩国、印度、巴西、澳大利亚、新西兰、中国等29个国家的代表参加了本次大会．会议宣读口头报告244篇，张贴论文117篇，其中包括大会报告11篇，邀请报告31篇．会议论文经严格评审后由Materials Science and Engineering A杂志选择收录．下届会议将于2005年在韩国举行．

涠11-平台结构强度全尺度原位监测研究

以力学为主线而进行的多学科综合的研究。主要工作包括平台结构应力、加速度和风、浪、流环境的监测与分析,疲劳分析和寿命估算,极端环境条件下平台人员工作安全性评估,以及数据的采集和处理技术。研究结果给定了与海洋平台结构设计和运行安全密切相关的力学规律和重要资料,为平台结构的强度设计与评估提供了实用依据。

板壳断裂力学

本书阐明了板壳断裂理论的基础。论证了Reissner型板壳断裂理论的科学性、经典板壳断裂理论的缺陷及在一定范围内仍具有的实用价值；介绍了作者所创意的研究Reissner型板壳断裂纹尖端场的方法等。

目录

高等断裂力学

《高等断裂力学》系统论述断裂力学的基本概念、理论基础、力学原理、分析方法以及断裂力学的实验测定和工程应用。深入阐明了断裂力学各个重要发展阶段的新颖学术思想和原创性工作，同时融会贯通地介绍了国内学者在作者熟悉的若干领域内的创造性贡献。　　《高等断裂力学》共14章。第1章介绍断裂力学的历史背景和发展脉络；第2～5章介绍线弹性断裂力学；第6～8章论述弹塑性断裂力学；第9及第10章分别介绍疲劳裂纹扩展和界面裂纹；第11～14章阐述裂纹体弹性动力学和裂纹动态扩展。　　《高等断裂力学》适合从事断裂力学研究和应用的科技工作者及工程师使用和参考，也可供力学专业的高年级本科生和研究生阅读参考.

Spectroscopic properties and Judd-Ofelt theory analysis of Dy3+ doped oxyfluoride silicate glass

Dy3+ doped oxyfluoride silicate glass was prepared and its optical absorption, 1.3 mu m emission, and upconversion luminescence properties were studied. Furthermore, the Judd-Ofelt [Phys. Rev. 127, 750 (1962); J. Chem. Phys. 37, 511 (1962)] intensity parameters, oscillator strengths, spontaneous transition probability, fluorescence branching ratio and radiative lifetime were calculated by Judd-Ofelt theory, while stimulated emission cross section of H-6(9/2)+F-6(11/2)-> H-6(15/2) transition was calculated by McCumber theory [Phys. Rev. A. 134, 299 (1964)]. According to the obtained Judd-Ofelt intensity parameters Omega(2)=2.69x10(-20) cm(2), Omega(4)=1.64x10(-20) cm(2), and Omega(6)=1.64x10(-20) cm(2), the radiative lifetime was calculated to be 810 mu s for 1.3 mu m emission, whose full width at half maximum and sigma(e) were 115 nm and 2.21x10(-20)cm(2), respectively. In addition, near infrared to visible upconversion luminescence was observed and evaluated. The results suggest that Dy3+ doped oxyfluoride silicate glass can be used as potential host material for developing broadband optical amplifiers and laser applications.