人类免疫缺损病毒（HIV1—VIV2）的空间结构和金丝桃蒽酮素对该病毒…

我们用激光拉曼光谱研究了人类免疫缺损病毒（ＨＩＶ１－ＨＩＶ２）的空间结构以及金丝桃蒽酮素对该病毒的微观光敏损伤，并从分子水平探讨了金丝桃蒽酮素抗艾滋病毒的机理。     

非球谐振子势Schrdinger方程的精确解

将非球谐振子势V(r) =ar2 br4 cr6 径向波函数展开为指数函数与多项式函数的乘积 ,应用多项式函数的系数关系确定了体系的能级和波函数 .结果表明 ,体系处于束缚态时 ,势参数a ,b ,c必须满足一定的约束条件     

双(N''''-乙基-N-哌嗪基二硫代氨基甲酸锌)配合物[Zn_2(S_2CNC_4H_8NC_2H_5)_4]的晶体结构和表征(英文)

0 Introduction The ability ofthe dithiocarbam ate, -N CS2- ligand to bind to m etal has been known for m any years[1]. It form s a chelate with virtually all transition elem ents and has proven to be a versatile chelating agent for the separation and extr…     

激光光解时间分辨电子自旋共振波谱

介绍了激光诱导时间分辨电子自旋共振技术，简述了光诱导自旋极化的各种机理，并以若干例子介绍了这种技术的当前发展。     

163 一堂"点到直线的距离"研究性学习课

[主持人按 一般的研究性学习,是与学校的科技活动紧密结合起来,学生自主发现身边的问题,自主选择研究课题,综合运用各学科的知识,通过科研方法获得解决的一种学习过程.它的教育目标在于培养学生的创新能力与综合能力,也让学生从中体会到精诚合作的快乐.     

A transient process observation method based on the non-homogeneous Poisson process model

The current-mode-counting method is a new approach to observing transient processes,especially in transient nuclear fusion,based on the non-homogeneous Poisson process(NHPP)model.In this paper,a new measurement process model of the pulsed radiation field produced by transient nuclear fusion is built based on the NHPP.A simulated measurement is performed using the model,and the current signal from the detector is obtained by simulation based on Poisson process thinning.The neutron time spectrum is reconstructed and is in good agreement with the theoretical value,with its maximum error of a characteristic parameter less than 2.3%.Verification experiments were carried out on a CPNG-6 device at the China Institute of Atomic Energy,with a detection system with a nanosecond response time.The experimental charge amplitude spectra are in good agreement with those obtained by the traditional counting mode,and the characteristic parameters of the time spectrum are in good agreement with the theoretical values.This shows that the current-mode-counting method is effective for the observation of transient nuclear fusion processes.     

Absorption of ultrashort intense lasers in laser–solid interactions

With the advent of ultrashort high intensity laser pulses,laser absorption during the laser–solid interactions has received significant attention over the last two decades since it is related to a variety of applications of high intensity lasers,including the hot electron production for fast ignition of fusion targets,table-top bright X-ray and gamma-ray sources,ion acceleration,compact neutron sources,and generally the creation of high energy density matters.Normally,some absorption mechanisms found for nanosecond long laser pulses also appear for ultrashort laser pulses.The peculiar aspects with ultrashort laser pulses are that their absorption depends significantly on the preplasma condition and the initial target structures.Meanwhile,relativistic nonlinearity and ponderomotive force associated with the laser pulses lead to new mechanisms or phenomena,which are usually not found with nanosecond long pulses.In this paper,we present an overview of the recent progress on the major absorption mechanisms in intense laser–solid interactions,where emphasis is paid to our related theory and simulation studies.     

CONTROL CHAOS IN TRANSITION SYSTEM USING SAMPLED-DATA FEEDBACK

The method for controlling chaotic transition system was investigated using sampled- data . The output of chaotic transition system was sampled at a given sampling rate , then the sampled output was used by a feedbacks subsystem to construct a control signal for controlling chaotic transition system to the origin . Numerical simulations are presented to show the effectiveness and feasibility of the developed controller.     

微型斯特林制冷机振动主动控制

本文研究了微型斯特林制冷机的振动主动控制问题,设计了一种全新的减振方案,即用直线电机推动一个质量平衡块来抑制制冷机的振动,采用基于前馈的自寻优控制器,控制算法由DSP芯片实现,使用该方案,制冷机的振动水平减小了一个数量级。     

嵌入纳米Fe颗粒的Fe液凝固过程的分子动力学模拟

采用Sutton-Chen 势函数及分子动力学(MD)方法对嵌入了Fe纳米团簇(半径从0.4-1.8 nm)的Fe液凝固过程进行了模拟. 模拟结果表明只有当嵌入的纳米团簇半径超过0.82 nm才能降低凝固时所需要的临界过冷度(ΔT^*), 起到诱导凝固的作用. 同时采用原子键型指数法(CTIM-2)对样本在凝固过程中的原子结构进行了标定, 通过观察微观结构演变发现当嵌入纳米团簇能够作为凝固核心时, 体系按照hcp-fcc 交叉形核的方式长大. 同时还发现嵌入纳米团簇对体系凝固过程晶核的生长方向及凝固的最终构型存在“结构遗传效应”.