SPACE LIFE SCIENCE IN 2000-2001

Chinese scientists studied some of the problems in the field of space life science and achieved success in the area during 2000-2001. Space biological experi ments were carried out in the orbit and the results of ground studies on protein crystallization, space radiation, space motion sickness were introduced in this paper. The influences of simulated weightlessness on the brain-function, the car diovascular, endocrine hormones, immunity, skeletal and muscle systems were presented. In addition, gravity medicine and space environment medicine, as well as countermeasures to space deconditioning, such as the traditional Chinese medicine, were also reported.     

KuaFu Mission

The KuaFu mission-Space Storms, Aurora and Space Weather Explorer-is an "L1+Polar" triple satellite project composed of three spacecraft: KuaFu-A will be located at L1 and have instruments to observe solar EUV and FUV emissions, and white-light Coronal Mass Ejections (CMEs), and to measure radio waves, the local plasma and magnetic field,and high-energy particles. KuaFuB1 and KuaFu- B2 will bein polar orbits chosen to facilitate continuous 24 hours a day observation of the north polar Aurora Oval. The KuaFu mission is designed to observe the complete chain of disturbances from the solar atmosphere to geospace, including solar flares, CMEs, interplanetary clouds, shock waves, and their geo-effects, such as magnetospheric sub-storms and magnetic storms, and auroral activities. The mission may start at the next solar maximum (launch in about 2012), and with an initial mission lifetime of two to three years. KuaFu data will be used for the scientific study of space weather phenomena, and will be used for space weather monitoring and forecast purposes. The overall mission design, instrument complement, and incorporation of recent technologies will target new fundamental science, advance our understanding of the physical processes underlying space weather, and raise the standard of end-to-end monitoring of the Sun-Earth system.     

扭叶片型面在线检测的研究

以汽轮机700mm扭叶片为对象,在XK5040数控机床上,进行了型面误差在线检测的研究。     

齿轮测量中心测头数据采集系统

提出了齿轮测量中心电感测头的新型数据采集系统,包括以集成开关构成的新型相敏检波器和以单片机为核心的数据采集系统,可以应用于各种电感信号的处理,具有较强的通用性。     

Zonal mean temperature, pressure, zonal wind and geopotential height as functions of latitude

The new zonal mean COSPAR International Reference Atmosphere (CIRA-86) of temperature, zonal wind, and geopotential/geometric height is presented. This data can be used as a function of altitude or pressure and has nearly pole-to-pole coverage (80°S-80°N) extending from the ground to approximately 120 km. Data sources and methods of computation are described; in general, hydrostatic and thermal wind balance are maintained at all levels and latitudes. As shown by a series of cross sectional plots, the new CIRA accurately reproduces most of the characteristic features of the atmosphere such as the equatorial wind and the general structure of the tropopause, stratopause, and mesopause.     

2000年4月6-8日磁暴期间电离层TEC观测研究

利用北京、乌鲁木齐、武汉GPS观测数据计算的垂直总电子含量，分析了发生于2000年4月6-8日磁暴期间观测区域的电离层状态。结果表明，在4月7日北京时间0200-0700之间，在中、低纬地区出现了较弱的电离层负相暴，与前一日相比，最大TEC之差在-8TECU左右；在北京时间0700之后，在较高纬度地区开始出现强列的电离层负相暴，并且该负相暴随着时间逐渐增强；但在北京时间0700-0900之间，在低纬地区出现了电离层正相暴。在定时间内较高纬度地区的负相暴逐渐增强并向南移动而低纬地区的正相暴经历了增强到减弱的过程。     

刚性太阳电池阵基板的研究

文章简要地叙述碳纤维复合材料刚性太阳电池阵基板的结构设计,理论分析,模态试验和振动试验。理论分析和试验结果比较一致。通过试验还解决了基板各种复合材料的力学性能测试问题,取得了必要的数据。     

多元线性回归在坐标测量中的应用

简要介绍了多元线性回归的数学原理,重点分析了坐标测量中利用回归分析进行基本几何要素处理计算的原理、方法和预处理技巧,在此基础上介绍和讨论了形位误差的处理计算方法。     

广州地磁Z分量日变幅的谱特征

利用1972—1993年广州地磁资料，分析了Z分量日变幅的年平均、年变化和半年变化等低频成分的逐年变化，以及小于60天的短周期变化特征．同时对1972—1993年的F10.7日均值进行了谱分析．结果指出，广州地磁Z分量日变幅的年平均与太阳活动指数F10．7的年平均存在良好的线性相关；具有幅度大约5nT夏季极大的年变化，与太阳活动没有明显相关，是一种季节效应；存在春秋分极大的半年变化，幅度与太阳活动有关，高年的幅度明显大于低年；具有明显的与太阳自转相关的27天左右的变化和明显的与行星波有关的接近16日、10日、5日、2日等短周期变化．广州地磁Z分量日变幅的这些谱特征，有助于更深入地了解中低层大气对电离层影响的物理机制．     

光学测径方法综述

概述了近年来国内外出现的各种光学测径方法,并分析了各自的优缺点。