毛细泵环中两相循环回路的初步分析研究

本文初步分析研究了在微重力或失重情况下毛细泵环中两相循环回路的稳态流动，情况，提出了基于力平衡的两相循环回路一维稳态数学描述。从计算结果得出了最佳有效毛细孔半径等结论。     

新型高推比涡轮风扇发动机盘时耦合振动分析

本文将群论算法和动态子结构技术结合起来，并采用计算效率极高的Ｂｅｎｆｉｅｌｄ－Ｈｒｕｄａ的模态代入变换法，分析了某型发动机压气机的叶片／轮盘耦合系统的振动特性，计算了该叶片／轮盘耦合系统的前５阶振动频率和振型．根据叶片／轮盘耦合系统的共振条件进行共振分析，确定该发动机压气机有可能发生叶片／轮盘耦合共振．     

随机控制与输出反馈控制的最优协调性合成

应用双控制器的最优协调性合成设计方法，在离散时间域内研究了随机控制作用和输出反馈控制作用的合成设计问题，构造了一个数值迭代计算方案来求解相应的控制规律，然后，通过设计实例验证了设计方法的有效性，并进行了有意义的对比分析。     

试论政府转换经济职能的着眼点

政府转换经济职能的含义,主要是处理好政府与企业、管理与服务、直接管理方式与间接管理方式,以及政府机构调整四个方面的关系,中心是解决政府为企业服务的问题,因此,转换政府经济职能应当紧紧抓住服务,认真做好(1)更新观念、确立起企业在经济活动中的主体地位;(2)制订经济计划、行业规划以及完善各项法规条例;(3)以“小政府、大服务”的原则调整政府机构;(4)政府经济职能法制化等方面的工作。     

组合发动机多种燃料和多种氧化剂的当量比计算法

提出了两种计算燃料和氧化剂当量比的方法。方法之一是“混合气法”;假方法之二是“当量油气比法”。燃烧过程中使用的燃料种类数及氧化剂种类数均没有限制。还假设了一个组合发动机作为例题。它包括火箭发动机、冲压发动机、涡喷发动机及加力燃烧室。使用的燃料为液氢、甲烷、丙烷和航空煤油。氧化剂为液氧和空气。     

Chemistry of the interstellar medium--an evolutionary dead end?

An analysis of the experimental data available and of the present theoretical concepts shows that even the initial physicochemical chemical precellular stages of biological evolution are impossible in the interstellar medium, while biomonomers possibly formed on asteroids and comets might have participated after transportation to the Earth in the final stages of the origin of the first precellular biological structures and then in the first living cells.     

An approach to the detection of microbe life in planetary environments through charge-coupled devices

The use of charge-coupled devices is suggested as a means for detecting growth of micro-organism colonies. The accuracy of the method is determined by channel width and the sensitivity by the signal/noise ratio. The method was tested on a dense nutrient medium, which is to be considered more suitable to micro-organisms of the dry Martian soil than the water solution of nutrients employed in the Viking's strategy.     

Galileo Photopolarimeter/Radiometer experiment

The Photopolarimeter/Radiometer (PPR) is a remote sensing instrument on the Galileo Orbiter designed to measure the degree of linear polarization and the intensity of reflected sunlight in ten spectral channels between 410 and 945 nm to determine the physical properties of Jovian clouds and aerosols, and to characterize the texture and microstructure of satellite surfaces. The PPR also measures thermal radiation in five spectral bands between 15 and 100 m to sense the upper tropospheric temperature structure. Two additional channels which measure spectrally integrated solar and solar plus thermal radiation are used to determine the planetary radiation budget components. The PPR photopolarimetric measurements utilize previously flown technology for high-precision polarimetry using a calcite Wollaston prism and two silicon photodiodes to enable simultaneous detection of the two orthogonal polarization components. The PPR radiometry measurements are made with a lithium tantalate pyroelectric detector utilizing a unique arrangement of radiometric stops and a scene/space chopper blade to enable a warm instrument to sense accurately the much colder scene temperatures.     

小振幅振荡圆柱域内部的定常整流旋涡流动

对充满静止不可压缩粘性流体的圆柱形，当柱壁沿垂直于柱轴方向作小振幅简谐振荡时的内部流动进行了实验研究，发现柱壁振荡在圆柱域内也诱导形成旋涡形态的定常整流流动。流动图谱随不同的振荡参数组合呈现四涡形态、双涡形态以及足印状双涡和蝶状四涡的过渡形态，并初步给出了不同整流图谱随数变化的演化规律。