复合材料及其结构的力学进展（第一册）

复合材料及其结构的力学进展 （第四册）

复合材料及其结构的力学进展（第二册）

郭永怀先生诞辰九十周年纪念文集

目录

力学未来15年国际学术讨论会论文集

塑性力学和细观力学文集

气动热力学

竹纤维增强树脂复合材料及其微观形貌

流体力学数值模拟

本书介绍了采用差分方法求解流体力学方程、数值模拟各种绕流流场的工作及不同类型的分离流流场的计算结果.

目录

气体动力学基本原理 A编 气体动力学诸方程

目录

现代科学技术新成就

微重力池沸腾传热研究

对利用中国返回式卫星搭载开展的两次微重力池沸腾空间实验及地基常重力和落塔短时微重力实验的结果进行了评述.研究发现微重力时丝状加热器沸腾传热会略有强化,而平板力加热器则在高热流条件下明显恶化.微重力时,气泡脱落前存在沿加热面的横向运动,加剧了相邻气泡间的合并,合并气泡会在其表而振荡作用下从加热面脱落.Marangoni效应对于微重力气泡行为有重要影响.

Quantum computation based on a quantum switch in cavity QED

A feasible scheme for constructing quantum logic gates is proposed on the basis of quantum switches in cavity QED. It is shown that the light field which is fed into the cavity due to the passage of an atom in a certain state can be used to manipulate the conditioned quantum logical gate. In our scheme, the quantum information is encoded in the states of Rydberg atoms and the cavity mode is not used as logical qubits or as a communicating "bus"; thus, the effect of atomic spontaneous emission can be neglected and the strict requirements for the cavity can be relaxed.

Nd3+螯合物的含氢有机溶液光谱性能研究

Tris-thenoyltrifluroacetonate of Nd3+ has been prepared and dissolved in DMF solation with very high concentration, and the contained hydrogen has not been substituted by deuterium. The absorption spectrum, emission spectrum, and fluorescence lifetime of the solution were measured. Very obvious characteristic fluorescence peaks were observed at 898 and 1058 nm. Based on Judd-Ofelt theory, three intensity parameters were obtained: Omega(2) = 4.9 x 10(-20) cm(2), Omega(4) = 5.1 x 10(-20) cm(2) and Omega(6) = 2.5 x 10(-20) cm(2). Line strengths S-cal, oscillator strengths f(cal), radiative transition probabilities A(ed), radiative lifetimes tau(r) and branch ratios beta were calculated too. The measured lifetime tau of 1058 nm peak is 460 mu s, and that of 898 nm 505 mu s. Comparison between theoretically computed radiative lifetime tau(r)(682 mu s) and the measured lifetime indicates that the non-radiative transition probability of the solution is very low and the fluorescence quantum efficiency very high. High values of three intensity parameters prove the high asymmetric surroundings of Nd3+, which is important for Nd3+ to absorb the excitation energy. Spectropic quality factor Omega(4)/Omega(6) > 1 makes radiation at 898 nm stronger than at 1058 nm.

科研院所科研管理中的激励与约束机制

管理是通过计划、组织、控制、领导等工作,尽可能合理而有效地利用组织所拥有的资源,以实现组织目标的过程。所谓科研院所科研管理,简言之就是对科研院所科研活动的组织与监控,而科研是一种以智力形式表现出来的活动。科研能力的开发与科研人员的态度有很大的关系。