钠原子高里德伯态跃迁的模型势研究

应用我们提出的ｋ系数方法［物理学报，４２（１９９３），７２７］，使用最弱受约束电子势模型下的简单解析波函数，我们系统研究了钠原子高里德伯态（ｎ～４０）间跃迁的振子强度与辐射寿命，所得振子强度及辐射寿命与可得到的其他作者的结果作了比较，表明了结合ｋ系数校正的最弱受约束电子势模型方法对于研究Ｎａ原子的高里德伯态性质的有效性，并在各种节点校正下，得到了对应于各跃迁类的节点校正规则     

Linear rank and corank preserving maps on (H) and an application to *-semigroup isomorphisms of operator ideals

We characterize linear rank-k nonincreasing, rank-k preserving, and corank-k preserving maps on B(H), the algebra of all bounded linear operators on the Hilbert space H. This unifies and extends finite-dimensional results and results on linear rank-1 non-increasing and rank-1 preserving maps in the infinite-dimensional case. We conclude with an application to *-semigroup isomorphisms of operator ideals.     

煤气管道沉积物的分析

以苯－乙醇为溶剂，在对煤气管道沉积物提取，分离后，采用２５ｍ＊０．２４ｍｍＩ．Ｄ．的石英毛细管ＯＶ－１０１柱进行了ＧＣ，ＧＣ－ＭＳ分析，鉴定出１９种有机成分，并用归一法作了定量分析，并用采用ＩＲ、点滴试验等方法对其无机物作了定性鉴定。     

A generalized expression for the ratio of the critical temperature to the critical pressure with the van der Waals surface area

Using an extensive database of experimental critical properties for heavy compounds, which have been compiled mostly from recent literature sources, it is shown that the ratio T_c: P_c (critical temperature over critical pressure) can be expressed in terms of the van der Waals surface area (Q_w), which is readily available for any compound from the group contributions of Bondi (given also in UNIFAC tables). The proposed correlation is based on the hole theory of Kurata and Isida for n-paraffin liquids, which is mathematically equivalent to Flory's theory of polymer solutions. The method is suitable for medium to high molecular weight compounds with unknown critical constants. For example, if only one of the two critical constants is available, then the proposed generalized equation offers a useful rapid procedure for the estimation of the other critical property for use in corresponding states, and other relevant applications where knowledge of the critical properties is required. Furthermore, the T_c: P_c method can be used in many cases for identifying the most suitable among the existing group contribution methods for estimating the critical properties of heavy and complex compounds for which experimental values are, very often, not available.     

High-pressure clathrate hydrate of acetone

X-ray diffraction study of quenched sample of acetone clathrate hydrate synthesized at 0.8 GPa was carried out. It was shown that the host frameworks of the hydrate comprise uniform cavities which are similar to that of recently characterized structure of high-pressure tetrahydrofurane hydrate. The unique peculiarity of investigated hydrate is decrease in the crystallographic symmetry of the hydrate arising from ordering in guest subsystem.     

Preliminary High Heat Flux Tests of Small-Scale Be/Cu Mock-Ups

China, as one of the members of ITER （international thermonuclear experimental reactor） project, one of the most important construction tasks is the fabrication of the first wall panel and shield blankets, which is the key engineering technology of ITER construction and might be one of the crucial issues of the future reactor too. Since 2004, an associated research team including Southwestern Institute of Physics （ SWIP ）, Ninxia Non-ferrous Metal Co. Itd and Chinese Institute of Engineering Physics, as well as Nuclear Power Institute of China has been established. Up to now, several series of interlayer for hot isostatic press （ HIP ） connection of beryllium and CuCrZr alloy have been tested. They are titanium film or coating, Cu coating and Al or AISiMg alloy etc. The bonding strength （tensile or shear strength ） of HIPed Be/Cu joints is up to 100 MPa.     

Weak invariance of the multidimensional rank statistic for nonstationary absolutely regular processes

In this paper, we study the weak invariance of the multidimensional rank statistic when the underlying random variables are nonstationary absolutely regular.     

K-theory for rickart C*-algebras

We give an explicit index map for any properly infinite closed ideal of a Rickart C ^*-algebra. This generalizes Olsen's work on von Neumann algebras. We use our results to compute the topological and the algebraic K ₁-groups of any quotient algebra of a Rickart C ^*-algebra.     

混煤煤灰熔融特性及矿物质形态的研究

本文对混煤熔融特性温度进行测定，并利用X-射线衍射分析对混煤煤灰的矿物组成进行试验分析，结果表明：混煤可改变原煤的结渣程度；混煤灰熔点与混煤比不成线性关系变化是混煤煤灰的低温共熔现象所致；在变形温度T1下煤灰中矿物质莫来石对煤灰熔融特性温度影响较大，莫来石含量越高，灰熔点越高．     

MNI—1U中性注入器高压长脉冲稳定电源研制

本文介绍一种为MNI-1U中性注入器研制的大功率长脉冲高压稳定电源。电路的技术指标为:输出脉冲电压50kV,脉冲电流30A,脉冲宽度50ms,上升下降时间小于25μs,平顶稳定度优于0.5％,调整响应时间30μs。当作直流高压稳压和稳流电源使用时,输出电压1-80kV,电流0.5—5A,电压或电流的稳定度可优于0.1％