大庆RP-3航空煤油热物性分析

针对广泛应用于超燃冲压发动机的吸热碳氢燃料,简要介绍了用于模拟燃料热物理特性的替代燃料方法和广义对应状态法则.以大庆RP-3航空煤油为例,选择了一个由49%（摩尔比）正十烷,44%1,3,5-三甲基环己烷以及7%正丙基苯组成的替代煤油用来模拟RP-3航空煤油进行热物理特性研究,并采用广义对应状态法则对替代煤油热力学和输运特性进行了数值研究.在此基础上,提出了预测超临界态流体通过音速喷管流量的新方法并得到了实验验证.

Spectral-line profile of turbulent gas

phases should be specified when the particle Reynolds number is higher than

超短脉冲照射下氟化锂的烧蚀机理及其超快动力学研究

研究了超短脉冲激光照射下LiF晶体的破坏机理及其超快动力学过程，利用扫描电镜和原子力显微镜等测试手段，观测了飞秒激光照射下LiF晶体的烧蚀形貌。利用烧蚀面积与激光脉冲能量的对数关系确定了LiF晶体的破坏阈值，并利用非线性玻璃棒展宽脉宽，得到了800nm激光作用下LiF破坏阈值对激光脉宽（50～1000fs）的依赖关系；利用抽运一探针超快探测平台，探测了LiF烧蚀过程中反射率的变化。采用雪崩击穿模型，并根据晶体材料反射率与材料的介电常量的依赖关系，通过数值计算，模拟了材料烧蚀阈值与脉宽的依赖关系及材料激发过

室温下稳定的多波长掺铒光纤激光器的研究

通过在线形谐振腔中引入一段缠绕在压电陶瓷上的单模光纤作为正弦相位调制器，使得激射波长的损耗不固定，抑制由于掺铒光纤的均匀展宽效应引起的模式竞争，从而避免了在室温下不稳定的单波长激射，实现了多波长掺铒光纤激光器的稳定输出。为了获得平坦的多波长输出，在谐振腔里使用了一个损耗峰位于1530nm处的长周期光纤光栅，以获得较为平坦的增益谱。通过两个3dB耦合器制成的反射型梳状滤波器的滤波作用，实验中观察到稳定的多波长激射，相邻波长间隔约为0．45nm。中心9个波长的输出功率平坦度为10dB，边模抑制比大于25dB。

新型光折变晶体Mn：YAP研究进展

Mn：YAP晶体是近年来发现的一种新型光折变晶体，在三维全息存储方向有广阔的应用前景。总结了Mn：YAP的晶体结构、光谱特征及其光折变模型，分析了它的优点和不足，并对其研究方向提出了设想。

Effects of Yb3+ in Er3+/Yb3+ codoped fluorophosphate glasses

For the Er3+/Yb3+ codoped fluorophosphate glasses, Judd-Ofelt theory is used to analyse the influence of YbF3 as not a sensitizer but an average component on the spectroscopic properties around 1530 nm emission. The double roles of Yb3+, as a sensitizer and as an average component, are discussed. It is found that Yb3+ as an average component contributes to the increase of fluorescence lifetime, and Yb3+ as a sensitizer has the best sensitization when its concentration is 2.4 mol%.

Spectroscopic properties of Er3+/Yb3+ codoped fluorophosphate glasses

Er3+/Yb3+ cocloped fluorophosphate glasses were prepared and their thermal stabilities, Raman spectra, absorption spectra, and fluorescence spectra were measured. It is found that proper content of NaF or PbF2 is helpful for the increase of stability against crystallization. The variation of AI(PO3)3 or NaF content in the composition affects not the maximum phonon energy but the phonon density. The introduction of PbF2 decreases the phonon energy slightly. Intense green and red upconversion luminescence was observed for the fluorophosphate glass with low phosphate content. A glass matrix for upconversion luminescence requiring neither expensive raw material nor special atmospheric conditioned preparation is provided. Infrared luminescence around 1530 nm was researched. Fluorophosphate glasses with bandwidth properties and stimulated-emission cross sections better than tellurite, germanate and silicate glasses are obtained. Through the introduction of NaF, the bandwidth properties are decreased. Through the introduction of PbF2 the gain properties are increased. On the whole, it is difficult to obtain a material with the best gain properties and bandwidth properties simultaneously. There should be a compromise between them according to the demand. (C) 2006 Elsevier B.V. All rights reserved.

Broadband amplification and upconversion luminescence properties of Er3+/Yb3+ co-doped fluorophosphate glass

Broadband and upconversion properties were studied in Er3+/Yb3+ co-doped fluorophosphate glasses. Large Omega(6) and S-ed/(S-ed + S-md) values and the flat gain profile over 1530-1585 nm indicate the good broadband properties of the glass system. And a premise of using Omega(6) as a parameter to estimate the broadband properties of the glasses is proposed for the first time to our knowledge. Results showed that fluorescence intensity, upconversion luminescence intensity, the intensity ratio of red/green light (656 nm/545 nm) are closely related to the Yb3+:Er3+ ratio and Er3+ concentration, and the corresponding calculated lifetime of F-4(9/2) and S-4(3/2) states for red and green upconversion samples proves this conclusion. The upconversion mechanism is also discussed. (c) 2005 Elsevier Ltd. All rights reserved.

Role of interface absorption in laser-induced local heating of optical coatings

Considering the interface absorption in optical coatings, we propose a model to simulate interface absorption. Calculations are made and the temperature field of several kinds of thin film multilayers, including those of partial reflectivity, high-reflectivity, and antireflectivity coatings are analyzed. The interface absorption is found to greatly influence the temperature distribution within multilayer coatings and to weaken the laser damage resistance of the samples. The real-time results of the photothermal deflection technique for laser induced damage to samples supports the model. (C) 1997 Society of Photo-Optical Instrumentation Engineers.

人字果属的研究兼讨论唐松草亚科的分类问题

本文通过对Dichocarpum属各种性状的系统研究及与近缘属比较分析，确认本属为毛茛科唐松草亚科中系统位置相当明确的一个好属。同时也对本属所在的唐松草亚科Thalictroideae的系统，做了部分修改。并提出这一亚科中,花瓣演化的两条可能途径及Dichocarpum属的花瓣类型。从生化、花粉、染色体以及形态特征的研究表明，本属可能与Asteropyrum属关系较为密切。 本文首次报导了Diehocarpum属存在三沟和散沟二种花粉类型。染色体数目的研究和分析表明，本属的染色体基数可能为X=6, 产于东亚大陆的种为古4倍体植物，产于日本列岛的种为古6倍体植物，而2倍体植物己经绝灭了。 作者对Dichocarpum属做了数量分类研究，其结果对本属下的分类提供了参考依据，并证明肖培根等把本属分为2个组的观点是合理的。综合各方面证据，并参考前人工作，作者把本属分为2个组、6个系，共包括15种3变种，有一新种和一新变种，并在本属系统排列中的某些类群下，讨论了分类处理意见。 本文讨论了Dichocarpum属的地理分布，本属的2个组分别分布于东亚大陆Sect.Di chocarpum和日本列岛Sect.Hutchinsonia。作者对本属这种分布格局的形成进行了探讨，认为中国西南山地可能为本属的分布区中心，日本列岛为木属次生的现代分布中心。并认为产于日本列岛上的人字果属植物，可能是由产于东亚大陆的Sect.DichocarBum组Ser.Dichocarpum系中的植物，在第三世纪进入日本的。

云南两个地方鸡种血液蛋白多态性研究

本试验采用水平式淀粉凝胶电泳法，对版纳斗鸡、武定鸡的６０个样本，３２个遗传位点的血液蛋白多态性进行了检测。这两个品种只在ＥＳ－１、ＡＫｐ－１、ＡＫｐ－２、ＬＡＰ四个座位显示多态。其余２５个位点均为单态，尚有ＣＰ、ＸＤＨ和ＩＤＨ三个座位染色后未出现谱带。试验结果表明：两鸡种之间虽呈现一定的遗传差异，但平均基因杂合度较小（０．０６０７；０．０６４８），两者间遗传距离较近（０．０７７８）。

印度、泰国和越南生物多样性概况

首先涉及到印度、泰国和越南３国陆生生物多样性主要栖息地──森林及自然保护区的概况，然后对３国的物种多样性以及生物多样性的就地保护，迁地保护及持续利用的情况作了介绍，并与我国的情况作些比较。