示波极谱法测定菁染料的半波电位

用极谱分析法测定光谱增感染料的半波电位是研究染料增感性能的重要方法之一。本文主要研究用示波极谱法测定菁染料的半波电位。实验结果说明，示波极谱法比普通极谱法具有更多的优点，测量的灵敏度较高，重现性好，准确度较高，测量速度快，分析操作程序简单，易于掌握。     

电分析化学及其相关技术研究取得新进展

1.示波分析示波分析是高鸿院士开创的一个新的电化学研究领域。近年来 ,该领域的研究取得了 4个方面的进展。一是解决了铂电极瞬时响应非电对离子的机理 ,并建立了瞬时信号分析法。二是建立了多种示波分析新方法 ,提出了动态示波分析法、银电极示波分析和高低频示波计时电位法等 6种示波分析新方法 ,改善了示波图的重现性 ,使示波计时电位法的灵敏度提高了 1～ 3个数量级。三是使示波分析发展到计算机化、从手工测量发展为可以用化学计量学方法进行非线性校正等自动测量方法。四是促进了有关理论研究和多功能示波分析仪器的研制。2 .有机化…     

流动注射分析法测定次氯酸钠中的有效氯(简报)

本文讨论用流动注射分析法测定次氯酸钠中有效氯的含量。实验表明,流动注射分析法对于此项测定不仅实用,而且操作非常简便。特别在待测样品批量较多时,数十秒钟内就能获得准确而且具有重现性的测定结果。在工厂实样的分析中,FIA 法与经典碘量法测定结果相比,其相对误差小于2.5%。应用本法10次重复测定结果的标准偏差为3.4×10~(-3),变动系数为5.3×10~(-3)。     

FIA溶液处理技术在水质分析中的应用

流动注射分析（flow injection analysis，FIA）是在连续流动分析技术（continuous flow analysis，CFA）的基础上发展起来的一种新的溶液处理技术，是在热力学非平衡条件下，在液流中重现地处理试样或试剂区带的定量流动分析技术，即采用把一定体积的试样注入到无气泡间隔的流动试剂（载流）中的方法，以确保混合过程与反应时间的高度重现性，在非平衡状态下高效率地完成试样的在线处理与测定。     

流动注射联用分析技术

流动注射是这几年发展起来的一种新型分析技术。它的特点是微量、快速、高效和自动化。这一技术可以和许多分析方法和实验技术联用,从而提高分析的灵敏度和重现性。本文对这种新型分析技术作一介绍,并结合近年的实验室工作对几种流动注射联用技术测定多组分作了分析和综述。     

流动注射分析光度法测定过氧化氢

流动注射分析法已发展成为一个很好的分析手段和一种很有用的测定方法。本文讨论应用碘量法来进行流动分析测试。用H_2SO_4和KI与H_2O_2反应,在420nm处测其吸光度。每个试样均有重现形状的单峰出现。在进样后30 s就可读出数据。其最低检出限量为1μg,工作曲线呈现极好的重现性。所得结果稳定,其相关系数超过0.9993,与KMnO_4法相比,其相对误差小于2.5％。同时,对某些分析条件,诸如H_2SO_4和KI的流速、样品用量、反应管长等因素进行了探讨。     

人工神经网络-流动注射分光光度法同时测定邻、间、对硝基苯酚

利用流动注射分析具有高精确度、高重现性等优点和人工神经网络具有自适应性和解决非线性问题的能力,改进三层BP神经网络,解析流动注射-光度分析测得的邻、间、对硝基苯酚的重叠光谱,建立了不经分离同时测定邻、间、对硝基苯酚的新化学计量学方法,具有较好的多元校正和分辨能力.     

人工神经网络-流动注射分光光度法同时测定邻、间、对硝基苯酚

利用流动注射分析具有高精确度、高重现性等优点和人工神经网络具有自适应性和解决非线性问题的能力,改进三层BP神经网络,解析流动注射-光度分析测得的邻、间、对硝基苯酚的重叠光谱,建立了不经分离同时测定邻、间、对硝基苯酚的新化学计量学方法,具有较好的多元校正和分辨能力.     

水杨基荧光酮流动注射胶束增敏分光光度法测定微量锆

在表面活性剂的存在下，以水杨基荧光酮胶束增敏分光光度法测定锆，具有灵敏度高选择性好优点，缺点是手工操作速度慢、试剂消耗较多。本文将此体系应用于流动注射分析系统，建立了锆的高灵敏快速分析方法。方法重现性好，分析速度快，分析频率达到１２０次／小时，用于锆青铜中的测定，结果满意。     

毛细管电泳流动注射进样装置的研究

设计了一种简单的毛细管电泳流动注射进样装置，利用双道蠕动泵分别输送样品和缓冲液，由瞬间关闭控制阀所产生的流体压力将样品引入分离毛细管．此进样方法操作简便且重现性较好，能实现自动、快速进样．     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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