空间交叉CARS测量NO气体的温度

测量了不同温度下NO气体的空间交叉相位匹配CARS光谱,并将其与理论计算谱进行拟合,从而实现了用CARS方法测量系统中点的温度。     

MCT列阵光电性能参数自动测试系统

本文介绍了霍尼威尔公司电光分部研制的MCT光电导列阵自动测试系统和洛克希德公司Palo Alto研究实验室研制的焦平面列阵光电参数的自动测试站。检测的光电性能参数包括光电响应率,响应光谱,噪声,探测器的RA乘积,响应频谱,光学串音和电学串音,响应率的空间频谱,调制传递函数等。     

软X射线多层膜的光学性质和优化设计

一、引言 X射线多层膜是X激光和X光学的重要元件。近几年,不论在理论上还是在技术上,都得到了较快发展。 从X光晶体衍射角度出发,X射线多层膜可看作超晶格一维人工晶体。从薄膜光学出发,X射线多层膜是一类光学薄膜。这种薄膜的膜层很薄,折射率都接近1,并存在一定的吸收。X     

激光与DNA作用的非线性扰动方程的研究

将激光与ＤＮＡ分子系统相互作用的运动方程化成Ｄｕｆｆｉｎｇ方程，进行了主共振、超谐波共振及两频激励组合共振的分析．从而成功地解释了激光育种中存在的一些难以理解的现象     

高效Nd:S-VAP激光器的特性研究

报道了激光二极管泵浦高效ＮｄＳ－ＶＡＰ激光器输出特性的研究结果。激光晶体掺钕浓度为～３％，厚度为２．６ｍｍ，基横模输出功率为２３３．０ｍＷ，斜率效率为４２．２％     

Optimization of connecting two communication networks subject to a reliability constraint

This paper considers optimization of two networks with a reliability constraint. The objective is to find some links to connect two networks, at a minimal cost, under the constraint that the system reliability of the resultant network is not less than a given level. A decomposition method based on branch and bound is used for solving the problem. In order to speed up the solution procedure, an upper bound on system reliability in terms of node degrees is applied. In particular, when the threshold P_o is large enough, a new algorithm, the cut tree algorithm, can more effectively give an optimal solution.     

DSP在声频谱测井仪器中的应用

声频谱仪器是一种新型的数控全波列测井仪，采用DSP作为它的控制核心器件，以便实现对整个仪器的工作状态、数据采集及传输的控制，是声频谱测井仪器的核心部分。文章主要介绍DSP的芯片结构和性能、ADSP-2101在声频谱仪器控制系统中的功能及实现、声频谱仪器现场采集的接收全波列波形和结论。     

川西北部上三叠统须家河组储层成岩作用研究

川西北部上三叠统须家河组储集岩主要为长石石英砂岩、长石岩屑石英砂岩。该储层砂岩是典型的低孔、低渗储集岩。以岩心观察为基础,结合对薄片鉴定、扫描电镜、阴极发光和物性等资料分析后认为,川西北上三叠统须家河组砂岩经历了压实作用、胶结作用、交代作用、溶解作用以及破裂作用等多种成岩作用,目前已达到了晚成岩阶段B期。成岩作用是控制该区储层物性的一个关键因素,在孔隙演化过程中,压实、胶结作用起主要破坏性作用,溶解、破裂作用起建设性作用。     

近红外分析实验室模型的评价——在汽油管道自动调合的应用

采用近红外光谱技术的偏最小二乘法建立了汽油调合组分和产品汽油（90、93、97号）辛烷值、组成等性质的实验室模型，并用常规方法分析样品验证模型的准确性和稳定性。实验表明，其准确性达到标准方法对测定结果的要求。近红外光谱技术能在5min内快速、准确测定调合组分汽油和成品汽油的辛烷值、芳烃、烯烃、苯等性质。     

Substituent Effects on Crosslike Packing of 2′,7′‐Diaryl‐ spiro(cyclopropane‐1,9′‐fluorene) Derivatives: Synthesis and Crystallographic,Optical, and Thermal Properties

A series of 2′,7′‐diarylspiro(cyclopropane‐1,9′‐fluorene) derivatives are efficiently synthesized and characterized to determine the reason for the “green‐light” emission of these compounds. These compounds exhibit bright‐violet to blue photoluminescence (PL) (λ^PL_max = 353–419 nm) with excellent PL quantum efficiencies (Φ_PL = 83–100 %) in solution and show high thermal stabilities (T_d = 267–474 °C). The variation of the optical properties of these molecules in the solid state depends on the different stacking modes of these compounds containing different substituents, which are revealed by crystallographic analysis. CH…π hydrogen bonds instead of intermolecular π–π interactions act as the driving force between adjacent fluorenes, even though a very small dialkyl group (cyclopropane) is introduced at the C‐9 position of fluorene. The crosslike molecular stacking efficiently reduces the energy transfer between the herring‐like aggregates and therefore results in the absence of a “green‐light” emission tail. In order to determine the cause of the “green‐light” emission tails, the fluorescence spectra of the films annealed in N₂ or in air are recorded. Broad green‐light emission tails were observed for the films annealed in air, which might be caused by fluorenone defects generated during processing or during the course of the photophysical analysis by reaction with residual oxygen.