旋转工况下小型液冷源设计

设计了一种适用于旋转工况的小型液冷源,该液冷源采用强迫风冷换热器的原理。液冷源液路循环采用闭式系统设计以适应旋转工况的要求,液位检测采用光电式液位传感器,通过单向阀和电磁阀的组合使用可有效防止水锤效应。该系统具有体积小、重量轻、环境适应性强等优点。     

线性方程组求解与向量组规范化的初等变换方法

本通过对线性方程组的系数矩阵的行与列的初等变换给出了求解线性方程组的方法，并通过对矩阵的初等变换给出了向量组正化的方法。     

Hadamard不等式的几种新证明

本利用几何算术不等式，矩阵的分解，行列式的性质给出Hadamard不等式几种新颖，简洁的证明。     

一个高密度连续射流团簇离子束源

根据在喷嘴出口附近电子枪来电离产生离子种子，在射流中形成连续，高密度的团簇离子束的设计思想，建造了连续的团簇离子束源，探索并优化了影响团簇离子束质量的因素，如电子枪的位置，滤束器的结构，滤束器与喷嘴间的距离等，初步研究了进气配对比氮氩团簇离子形成的影响，以氩气作为载体，适量的氮气，有助于Ａｒ－Ｎ＾＋２的形成。     

正互反阵的一个特征值问题

本文讨论层次分析方法提出的一个矩阵特征值问题:对于给定的正互反矩阵,如何修改它的一对元素使得主特征值能够减小?我们对此给出了解答。对于反复多次修改,我们构造了一个迭代程序并且证明了一定意义下的收敛性。将本文的结果应用于层次分析法,可以减少决策分析过程的盲目性。     

Measurement of the Seperation between Atoms beyond Diffraction Limit

We propose a scheme to obtain the distance of two identical atoms placed inside the standing wave field by monitoring the collective resonance fluorescence spectrum emitted by the two particles. We find three different parameter ranges, depending on the distance of the atoms as compared to the transition wavelength. For large interparticle distances, dipole-dipole coupling is negligible, and the main system evolution arises from the interaction with the standing wave field. In the small-distance limit, the dynamics is dominated by the dipole-dipole interaction. Finally, in the intermediate region, a rich interplay of the various couplings arises, which however is lifted for strong driving laser fields. The present measurement procedure allows us to distinguish the three cases. In each of the cases, we show how to determine the distance of the two particles and their respective positions relative to the nodes of the standing wave field with fractional-wavelength precision.     

一种可能的简并谱NNS分布

利用随机矩阵理论,通过对一特殊情形的简并谱展开研究,得到了简并谱一种可能的最小相邻间距NNS分布函数．研究表明,由于简并的存在,简并谱不仅可分解成随机谱和规则谱两个子谱,同时还影响其规则谱,使规则谱的能级斥力减少．     

ON THE UNIQUENESS OF THE WEAK SOLUTIONS OF A QUASILINEAR HYPERBOLIC SYSTEM WITH A SINGULAR SOURCE TERM

This paper is a continuation of the authors'previous paper[1].In this paper the authorsprove,assuming additional conditions on the initial data,some results about the existence anduniqueness of the entropy weak solutions of the Cauchy problem for the singular hyperbolicsystem a_t+(au)_x_2au/x=0,u_t+1/2(a~2+u~2)_x=0,x>0,t≥0.