THE TRANSFER BEHAVIOUR OF SOME CATIONS AT WATER／NITROBENZENE INTERFACE BY SEMIDIFFERENTIAL CYCLIC VOLTAMMETRY

The transfer of Sr~(2+) and Ba~(2+) ion, facilitated by 18-Crown-6 present in the aqueous phase, and of succinylcholine ion at w/nb interface were investigated by semi-differential cyclic voltammetry. A good polarographic curve of succinylcholine ion dissolved in water was obtained in the system of 0.01 mol/l LiCl (w)——0.01 mol/l TBATPB (nb). The peak current is directly proportional to the concentration of SC~(2+) ion. It can be used for the determination of SC and the detection limit is 1.05×10~(-5) mol/l.The apparent D~w and D~(nb) have been estimated. The transfer of Sr~(2+) and of Ba~(2+) at the interface are facilitated by 18-Crown-6 present in the aqueous phase and the peak current is directly proportional to the concentration of 18-Crown-6 in water. This method can be used for the determination of the complexing agent and for the stability constant of the complex formed in the aqueous phase.All the experimental results are in keeping with the theoretical.     

偏最小二乘紫外分光光度法同时测定萘，1－甲基萘和蒽

用偏最小二乘法（ＰＬＳ）进行校正和预测，不经分离同时测定了混合体系中的萘，１－甲基萘和蒽。萘，１－甲基萘和蒽的浓度分别在０～２８ｍｇ／Ｌ，０～４０ｍｇ／Ｌ和０～４０ｍｇ／Ｌ的浓度范围服从比耳定律。对合成样品中这三种组分进行分析，结果令人满意。     

THE INFLUENCE OF SPINNING CONDITION ON STRUCTURE & PROPERTIES OF MASS-DYED SUPERFINE PP AS-SPUN FILAMENTS

The effect of colorant additive on the rheology of PP polymer melt and the influence of spinning conditions on the crystalline and orientation structure of mass-dyed as-spun PP filament are reported. The △E~~~ value for all colored chips is higher than that of blank chip to a varying degree. The crystallinity and orientation degree of dyed PP as-spun filament decrease with increasing melt temperature, decreasing spinning speed and increasing denier per filament (dpf), while the crystallinity of dyed as-spun filament increases with the content of colorant additive as a nucleation agent.     

结构稳定性在非线性系统鲁棒性分析中的应用

探讨了非线性系统的结构稳定性、分叉点和鲁棒性之间的关系，提出了一种分析非线性系统鲁棒稳定性的方法，并给出了相应的计算实例．     

整体优化 提高高校学报质量

本文从学报形成的全过程入手,分析了影响学报质量的诸因素,提出了人与科学技术相结合;编者与作者相结合;编者与读者需要相结合;办刊与高校教育相结合来提高学报质量的观点,使学报在信息传播的全过程中实现整体优化。     

数学中的探索研究和发现

本书是一本关于数学“解题术”的论著，其目的是引导中学生和大学低年级学生通过解数学题提高思维能力和解题技巧，着重培养他们数学学习中的探索精神，以研究解题规律和发现新的问题和结果。     

Ontology-Based Semantic Annotation for Problem Set Archives in the Web

0 IntroductionAsneim mapnotircta nWte pbre i-sco tnhdieti oabnilfiotry r etaoli zainnngotthatee go aWle obf trhe-esources with semanticinformation[1]. However ,annotationtools so far basically allowthe user to annotate with plaintext using the method of information extraction.In manycases ,one can hardly extract semantics from Web docu-ments ,such as problemset archivesinthe Web.Massive problemset archives are availableinthe Web,for example,http://acm.uva.es, while each problemsetarchives pr…     

视频信息监控与处理--ATM视频监控系统下

针对银行ATM管理上的缺陷，提出了ATM视频监控系统，并就系统的功能及其信息处理与安全方面的特点作了论述。     

Ruin Probability with Variable Premium Rate and Disturbed by Diffusion in a Markovian Environment

We consider a risk model with a premium rate which varies with the level of free reserves. In this model, the occurrence of claims is described by a Cox process with Markov intensity process, and the influence of stochastic factors is considered by adding a diffusion process. The integro-differential equation for the ruin probability is derived by a infinitesimal method.     

电子碰撞Ag的L壳层电离截面的测量

作者用Si(Li)探测器测量了能量为5～2keV的电子碰撞Ag的L壳总平均电离截面；用Monte Carlo方法计算的电子反射能谱，修正了来自衬底的反射电子对测量结果的影响．作者对实验结果与Cryzinski的理论计算结果进了比较．