Transition region line-shifts in the rebound shock spicule model

Spectral emission lines created in the solar chromosphere — corona transition region show net red-shifts. It has been proposed that this may be the result of the return of spicular material. We simulate a spicule numerically using the rebound shock model and find that the resulting hydrodynamic evolution leads to a perceived up-flow in transition region spectral lines even though the average velocity in the line forming region is directed downward. The explanation for this apparent paradox is found in the correlation between density and velocity in the waves generated by the rebound shock spicule.     

KD和BOLL指标对判断股价走势有效性分析

选取在上交所上市的30支股票样本的历史数据进行统计，对现今中国股票市场流行的两个技术指标(KD线和BOLL带)结合同期股价的实际走势加以分析，得出根据这两种指标判断所作的股价走势预测与实际股价走势相符的比例，探讨技术指标对判断股价走势的作用。     

非像面散斑法层析火焰折射率场分布

本文通过理论分析给出了激光束通过火焰后的偏转角与折射率的关系，并给出了透镜后非像面散斑与火焰周围介质折射率场的关系表达式。用双曝光散斑法层析了火焰上不同截面的折射率分布。给出实验结果，并予以讨论。     

河南全面实现小康社会的定性定量分析

全面建设小康社会，从定性上看，全面小康是惠及全国各族人民的经济、政治、文化社会全面发展的小康。从定量上看，它也应有一个指标体系，它包括人均国内生产总值，城镇居民家庭人均可支配收入，农村居民家庭人均纯收入，恩格尔系数等方面。文章从河南和全国情况出发，对此作了比较分析。     

Evolution of the Protosolar Nebula and Formation of the Giant Planets

The formation of planetary systems is intimately tied to the question of the evolution of the gas and solid material in the early nebula. Current models of evolution of circumstellar disks are reviewed here with emphasis on the so-called “alpha models” in which angular momentum is transported outward by turbulent viscosity, parameterized by an dimensionless parameter α. A simple 1D model of protoplanetary disks that includes gas and embedded particles is used to introduce key questions on planetesimal formation. This model includes the aerodynamic properties of solid ice and rock grains to calculate their migration and growth. We show that the evolution of the nebula and migration and growth of its solids proceed on timescales that are generally not much longer than the timescale necessary to fully form the star-disk system from the molecular cloud. Contrary to a widely used approach, planet formation therefore can neither be studied in a static nebula nor in a nebula evolving from an arbitrary initial condition. We propose a simple approach to both account for sedimentation from the molecular cloud onto the disk, disk evolution and migration of solids. Giant planets have key roles in the history of the forming Solar System: they formed relatively early, when a significant amount of hydrogen and helium were still present in the nebula, and have a mass that is a sizable fraction of the disk mass at any given time. Their composition is also of interest because when compared to the solar composition, their enrichment in elements other than hydrogen and helium is a witness of sorting processes that occured in the protosolar nebula. We review likely scenarios capable of explaining both the presence of central dense cores in Jupiter, Saturn, Uranus and Neptune and their global composition. This revised version was published online in August 2006 with corrections to the Cover Date.     

可视化技术在分析新型蓄冷材料——笼型化合物（Clathrate）溶解过程中的应用（一）、（二）

混浊液内部的流动，由于微粒子之间的相互作用以及因浊度高不易进行内部观察，所以无论是分析还是可视化实验都相当困难，存在着许多未弄清的问题。通过采用折射率匹配（Refractive-IndexMatching）技术，使透明的微粒子与透明的溶媒的折射率近乎相同，做成一种透明的“混浊液”，从而使混入其中的示踪粒子的运动轨迹能被摄像机捕捉到，并以微粒子的沉降和温度的干涉所引起的流动现象为焦点，利用图像速度测量法来处理分析所拍摄到的可视化图像，成功地获得了定量的混浊液内部的速度场，为进一步揭示混浊液内部自然对流的流动机理提供了实验依据。     

太阳微波爆发频谱事件

国家天文台1.0-2.0GHz,2.6-3.8GHz太阳射电频谱仪从1994年1月和1996年9月投入观测至2000年4月10日记录到太阳射电爆发分别为297个和316个，取得了高质量的高时间分辨率，高频率分辨率的动态谱资料，为研究耀斑各种尺度的时间及空间演化过程提供了丰富的信息，1998年4月15日的共同事件在时间和频率上显示了丰富的幅度和结构的变化。     

模拟地球同步轨道辐照环境对光学太阳反射镜性能的影响

研究了模拟地球同步轨道辐照环境对卫星用温控涂层-光学太阳反射镜(OSR)性能的影响。对所研制的两类OSR 片进行的辐照试验项目有,真空紫外辐照、低能电子和两种能量的质子辐照。此外还进行了等离子体环境条件下的表面充/放电效应试验。经过相当于安装在地球同步轨道卫星南北极位置处,在空间七年所受到的电子、质子和紫外辐照总剂量的辐照后,导电型OSR 的太阳光谱吸收率α_s 由0.068增加到0.078,法向发射率ε_n 由0.83降低到0.72;而非导电型OSR的α_s 由0.066增加到0.085,ε_n 由0.82降低到0.76。表面充/放电试验的结果表明:导电型OSR 的充电电位仅在15～40V 之间,而非导电型OSR 的充电电位则可高达13kV。因此导电型OSR能有效地控制表面的充/放电现象。     

The characteristics of sharp (small-scale) boundaries of solar wind plasma and magnetic field structures

We investigate properties of large (>20%) and sharp (<10 min) solar wind ion flux changes using INTERBALL-1 and WIND plasma and magnetic field measurements from 1996 to 1999. These ion flux changes are the boundaries of small-scale and middle-scale solar wind structures. We describe the behavior of the solar wind velocity, temperature and interplanetary magnetic field (IMF) during these sudden flux changes. Many of the largest ion flux changes occur during periods when the solar wind velocity is nearly constant, so these are mainly plasma density changes. The IMF magnitude and direction changes at these events can be either large or small. For about 55% of the ion flux changes, the sum of the thermal and magnetic pressure are in balance across the boundary. In many of the other cases, the thermal pressure change is significantly more than the magnetic pressure change. We also attempted to classify the types of discontinuities observed.     

低纬地磁Z分量的半年变化

利用武汉、广州、泉州和琼中等4个低纬地磁站连续多年的地磁资料，计算了各月5个磁静日Z分量日均值与中午1100---1300时段平均值之差(Dz)，对每年12个Dz采用多元回归分析方法，得到各年的半年变化幅度和相位．结果表明：4个站的Dz每年都有半年变化现象；半年变化幅度与太阳活动有关，一般来说，太阳活动高年Dz半年变化幅度明显大于太阳活动低年；太阳活动本身的半年变化，对Dz半年变化幅度有显著的调制作用；Dz半年变化的相位在3—4月(或9—10月)，即极大值出现在分季；低纬地区地磁Z分量存在显著的半年变化，能够反映赤道电急流也有明显的半年变化，这再一次证明，赤道电急流幅度的半年变化，通过“喷泉效应”使得电离层，f0F2产生半年变化，其是产生，f0F2半年变化的一个主要因素．