中国科学院力学研究所2005年科技工作回顾

2005年，力学所经历了几件大事：一是完成了中国科学院知识创新工程试点二期的总结和创新三期筹划，并顺利通过了现场评估，为进入2006年开始的创新三期奠定了坚实基础；二是成功举办丁“庆祝力学研究所建所50周年暨钱学森回国50周年大会”；二是在国家和（部门）重点实验室的评估中，我所非线性力学国家重点实验室和高温气体动力学重点实验室被评为数理科学“良好类”实验室．

中国力学学会学术大会’2005(CCTAM’2005)会议简介

<正>1 会议概况由中国力学学会主办,中国力学学会和北京工业大学共同承办的“中国力学学会学术大会’2005”(Chinese Conference of Theoretical and Applied Mechanics-2005,CCTAM’2005)于2005年8月26～28日在北京召开。大会主席由中国力学学会理事长崔尔杰院士担任,副主席有程耿东、贺德馨、李家春、沈为平、苏先樾、王自强、吴有生、杨卫、卢振洋、张泽。

Freestanding optical fibers fabricated in a glass chip by femtosecond laser micromachining for lab-on-a-chip application (vol 13, pg 7225, 2005)

An erratum is presented to correct the propagation loss of the freestanding optical fibers fabricated in glass chip. (c) 2006 Optical Society of America.

光学领域里的一对奇葩——介绍2005年诺贝尔物理学奖

2005年诺贝尔物理学奖授于了光学研究领域里的两项原创性工作：1963年美国物理学家罗伊·格劳伯（R．J．Glauber 1925～）提出的“相干性量子理论”，以及1983年美国物理学家约翰·霍尔（J．L．Hall．1934～）和德国物理学家特奥多尔·亨施（T．W．Hansch．1941～）利用激光的特性对精确测量技术所作的发展。近些年来诺贝尔物理学奖频频惠顾光学研究领域。如2001年诺贝尔物理学奖授予了从事玻色一爱因斯坦凝聚的相关研究、1997年诺贝尔物理学奖授予华裔科学家朱棣文从事的激光冷却和俘获原子

丝绸之路上的古代玻璃研究: 2004年乌鲁木齐中国北方古玻璃研讨会和2005年上海国际玻璃考古研讨会论文集

本书首次系统地介绍了中国古代玻璃技术的起源和发展以及对外传播,并汇集了丰富的中外专家对北方(沙漠)丝绸之路,特别是新疆地区(古称西域)古代玻璃的出土历史和背景、外观特征和化学成分的研究结果,系统介绍了丝绸之路对中国古代玻璃技术和艺术发展的影响。

Mode properties of off-axis one-sided hybrid resonator for novel high average power dual-slab laser

A novel dual-slab laser with off-axis one-sided hybrid resonator is presented. The mode properties of the hybrid resonator are calculated using a fast Fourier transform method (FFT). The influence of wavefront distoration on the output beam quality is considered. Results indicate that the novel dual-slab laser is better than the normal dual-slab laser with off-axis one-sided hybrid resonator.

Otolith characteristics and age determination of an endemic Ptychobarbus dipogon (Regan, 1905) (Cyprinidae: Schizothoracinae) in the Yarlung Tsangpo River, Tibet

We describe the microincrements, checks and annuli in the lapilli of the schizothoracine Ptychobarbus dipogon, an endemic species of the Tibetan plateau. We collected samples in the Yarlung Tsangpo River and its tributaries on a monthly basis (from April 2004 to August 2006). We describe the shape features of the three pairs of otoliths and document the full trajectory of lapillus development. We found that five to seven checks were clearly visible in the opaque zone of the first annulus. The pattern of 21-23 daily growth increments within each check might be explained as a lunar-induced deposition. We counted between 137 and 154 increments within the first annulus. Annuli appeared as a sequence of gradually declining increment widths, whereas false rings were characterized by abrupt checks. Our oldest estimates were 23(+)years for males and 44(+) for females. The time of annulus completion was clearly between March and April each year using monthly marginal increments analysis. We consider the factors responsible for daily increment formation as an endogenous circadian rhythm. Environmental information, such as strong sunlight and cold water temperatures in the Tibetan Plateau, could reinforce the endogenous daily cycle. Our results provided important data addressing the ecology and population dynamics of P. dipogon.

Age structure, growth and mortality estimates of an endemic Ptychobarbus dipogon (Regan, 1905) (Cyprinidae: Schizothoracinae) in the Lhasa River, Tibet

Ptychobarbus dipogon is an endemic fish in the Yarlung Tsangpo River, but its biology is poorly known. We sampled 582 specimens (total length, TL, between 70.6 and 593.0 mm) from April 2004 to August 2006 in the Lhasa River, Tibet. We estimated ages based on the counts of alternating opaque and translucent zones (annuli) in thin transverse sections of lapilli otoliths. Ages ranged from 1(+) to 23(+) years for males and 1(+) to 44(+) for females. The observed 44(+) years was the oldest reported for schizothoracine fishes. Females attained a larger size than males. The TL weight relationship was W=7.12 x 10(-6)TL(3.006) for combined sexes. The growth parameters fitted von Bertalanffy growth functions were L-infinity = 598.66 mm, k=0.0898 year(-1), t(0)=-0.7261 year and W-infinity = 1585.38 g for females and L-infinity = 494.23mm, k=0.1197 year(-1), t(0)=-0.7296 year and W-infinity = 904.88g for males. The longevities of 32.7 year for females and 24.3 year for males were similar to the observed ages. Using an empirical model we estimated the instantaneous rate of total mortality (Z) at 0.28 per year in the lower reaches. Z in the upper and middle stocks was close to the M because of unexploited or lightly exploited stock. Protracted longevity, slow growth, low natural mortality and large body size were typical characteristics of P. dipogon. The current declining trend of P. dipogon could be prevented by altering fishing regulations.