多种不同离子组成的等离子体中的非线性波

研究了非线性声波在不均匀等离子体中的传播情况．在不考虑反射的情况下，使用约化摄动法得到KdV型方程及其准孤子解的解析表达式．研究结果发现，当孤子穿过不连续分界面时，孤子振幅将发生变化．     

如何编写质量手册

为了确保质量手册的有效实施，在编制质量手册的过程中，应当从企业自身需要、企业质量管理经验、现有管理标准和工作标准的利用、发挥企业职工参与的积极性和作用等方面着手编写质量手册。     

Facile Fabrication of Large Area Polystyrene Colloidal Crystal Monolayer via Surfactant-free Langmuir-Blodgett Technique

A facile and novel method for the production of a large area of well-ordered polystyrene(PS)colloidal crystal monolayer was established using the surfactant-free Langmuir-Blodgett(LB)technique.The hydrophobic property(film-forming ability)of PS spheres was improved by a thermo-rheology treatment before LB assembly,and a large film was obtained.In contrast to the traditional LB technique,no surfactant was needed in this method,which could eliminate the additional contamination of surfactants in the preparation process and provided the products with versatile applications in nanosphere lithography(NSL)for biosensor,surface plasmon resonance,and surface enhanced Raman spectroscopy.     

ELECTRON-ELECTRON CORRELATION IN THE HELIUM 3De DOUBLY EXCITED STATES

The qualitative features of the electron-electron correlation in the helium ³D^e doubly excited states have been investigated via an example of the N = 3, n=4 series. The angular, radial-angular and radial-radial correlations have been shown in detail and the anisotropism of the electronic cloud has been found. The features of the ³D^e states have been compared with those of the L≤1 states.     

Properties of TRPO-HNO_3 complex used for direct dissolution of lanthanide and actinide oxides in supercritical fluid CO_2

The mixed trialkylphosphine oxide-nitric acid (TRPO-HNO3) complex prepared by contacting pure TRPO with concentrated HNO3 may be used as additives for direct dissolution of lanthanide and actinide ox- ides in the supercritical fluid carbon dioxide (SCF-CO2). Properties of the TRPO-HNO3 complex have been studied. Experimental results show when the initial HNO3/TRPO volume ratio is varied from 1:7 to 5:1, the concentration of HNO3 in the TRPO-HNO3 complex changes from 2.12 to 6.16 mol/L, the [HNO3]/[TRPO] ratio of the TRPO-HNO3 complex changes from 0.93 to 3.38, and the content of H2O in the TRPO-HNO3 complex changes from 0.97% to 2.70%. All of the density, viscosity and surface tension of the TRPO-HNO3 complex change with the concentration of HNO3 in the complex. The protons of HNO3 and H2O in the complex undergo rapid exchange to exhibit a singlet resonance peak in NMR spectra with D2O insert. When the TRPO-HNO3 complex dissolves in a low dielectric constant solvent, small droplets of HNO3 appear which can be detected by NMR.     

Iodine Mediated Efficient Formation of Ferrocenylcyanide in Aqueous Solution

Ferrocenylcyanide is a valuable precursor for preparation of nitrogen-containing ferrocenyl ligands. Originally, ferrocenylcyanide was prepared from ferrocenecarboxy- aldehyde by multi-steps transformations, at evaluated temperature. Very recently, a modi…     

基于机构组合原理复杂机构的符号表达

概念产品的信息表达是目前实现计算机对机构概念设计支持的瓶颈问题，作者基于机构组合原理，用矩阵形式描述基本机构，给出了串联式、并联式和混合式3种基本机构的组合方式的符号表达方法，该方法能够描述机构的类型、连接关系、空间位置关系以及机构的多功能等信息，为开发基于基本机构组合的复杂机械系统的计算机辅助概念设计系统奠定了理论基础，以复杂凸轮连杆机构为例，验证了本文提出的符号表达方法的可行性。     

Pre-formation Probability of 5He Cluster in Pre-equilibrium Mechanism

The possibility of 5He cluster emission has been affirmed theoretically. In order to describe the emission probability of 5He cluster, the pre-formation probability of 5He cluster in pre-equilibrium emission process is needed to be established. In terms of Iwamoto-Harada model, the theoretical formula of pre-formation probability of 5He cluster including 1p shell nucleon in pre-equilibrium mechanism has been established and calculated. In the case of low incident energies, the configuration of [1, m] for 5He cluster is the dominant part in the nuclear reaction. The calculated results indicate that pre-formation probability of configuration [1, m] for the unstable 5He cluster is much smaller than those of d, t, 3He, and 4He, i.e. the light stable composite particles, which are consisted of only 1s shell nucleons. However, it is propitious to the emission of 5He from the point of view on threshold energies, since the binding energies of 5He are generally lower than that of 3He in compound nucleus. The corresponding model formula has been given in this paper for described pre-formation probability of 5He cluster in pre-equilibrium mechanism.     

试论"艾森豪威尔主义"产生及夭亡的背景

20世纪50年代末，在国际政治舞台上出现了“艾森豪威尔主义”，它是美国当局为填补英法势力撤出中东而形成的所谓“力量真空”，镇压中东在二战后兴起的民族民主运动，同时以中东亲美国家为基地，与苏联展开争夺而出台的外交政策。它并没有考虑中东特殊的地理和人文环境，严重违背了世界历史发展的潮流，在中东人民和世界人民的反对下很快夭亡。艾森豪威尔主义产生及夭亡的背景与过程，在今天仍然具有一定的借鉴意义。     

论朗读的再造性

书面语言是一种不完全的语言,它难以完整的传播作者的信息.朗读是有声语言的一种表达形式,在信息的传达方面,它比书面语言更为完整、丰富.朗读者的任务是把作品的精神实质传达给听众,因此,朗读的再造性,意味着朗读者对作品的理解和感受.