2—丁烯醛气相中无催化环氧化反应

概述了碳碳双键在气相中无催化环氧化反应研究方法、反应机理．测定了393K时，2-丁烯醛与过氧化乙酰基在气相中环氧化反应的速度．研究表明，影响环氧化反应速度的主要因素，是双键上取代基的电子效应，取代基给电子能力越强环氧化反应速度越快．     

钼蓝比色法测定食品中的还原型维生素C

食品中的原型维生素Ｃ（Ｖｃ）能将磷钼酸盐定量还原成亮蓝色的钼蓝络合物，通过比色即可测定出食品中的还原型Ｖｃ的量。本文详细研究了影响显色反应的各种因素，结果表明在酸性介质中，维生素Ｃ与磷钼酸盐的反应速度且反应体系的吸光度稳定。在本文试验条件下，Ｖｃ浓度在０－１５００μｍ／２５ｍｌ范围内服从比耳定律。应用本法测定韭菜、桔子晶等食品中的还原型Ｖｃ，并与２．６－二氯靛酚法测定结果比较，基本一致。本文通过试     

二级反应速度常数测定数据的微机处理

典型二级反应速度常数的测定通常采用作图法，即反应某时刻浓度ｃ的倒数对时间ｔ作图求直线斜率．本文以乙酸乙酯皂化反应速度常数的测定为例，设计了计算机处理这一过程的算法与程序，并用ＴＵＲＢＯＰＡＳＣＡＬ语言在３８６－ＤＸ机上运行通过，采用数值拟合的方法，对所测定的有关数据自动取舍，根据误差要求，达到最佳效果，避免了用坐标纸手工作图所造成的不必要误差     

乙酸乙酯皂化反应速度常数的pH值测量法

根据二级反应的速度理论提出用测定溶液ＰＨ值的方法，在无需反应物有准确初始浓度的情况下，测定乙酸乙酯皂化反应速度常数值。     

碘酸钾——碘离子体系催化动力学电位法测定痕量铜

ＫＩＯ３氧化ＫＩ的反应为指示反应，用碘离子选择电极跟踪Ｉ＾－，建立了率动力学测定铜的新方法。在适宜条件下，该指示反应为一级反应，反应速度可用电位的变化ΔＥ表示，ΔＥ与铜浓度在５￣３７５ｎｇ／ｍＬ范围内呈线性关系，检出限为１．６ｎｇ／ｍＬ，水样的测定及回收试验均得到了满意结果。     

D—葡萄糖的溴氧化动力学

用分光光度法对溴氧化Ｄ葡萄糖的动力学方程式，反应级数以及反应的速率常数ｋ进行了测定，同时也测定了离子强度Ｉ对反应速度常数的影响。     

Pt－Rh合金电极上气体物质析出反应动力学

采用极化测量的方法，在０．５ｍｏｌ／ＬＨ２ＳＯ４溶液中，对Ｐｔ－Ｒｈ合金电极上电化学析氢、析氧反应动力学进行了系统的研究，确定了反应动力学参数．实验结果表明，对于析氢反应．合金的组成及温度的变化对反应速度影响很小．而对于析氧反应．Ｐｔ－Ｒｈ合金当中Ｒｈ含量的增加可导致反应速度加快；提高温度明显地加快反应速度．     

二级反应速度常数测量数据的微机处理

典型二级反应速度常数的测定通常采用作图法，即反应某时刻浓度ｃ的倒数对时间ｔ作图求直线斜率。本文以乙酸乙酯皂化反应速度常数的测定为例，设计了计算机处理这一过程的算法与程序，并用ＴＵＲＢＯ ＰＡＳＣＡＬ语言在３８６－ＤＸ机上运行通过，采用数值拟合的方法，对所测定的有关数据自动取舍，根据误差要求，达到最佳效果，避免了用坐标纸手工作图所造成的不必要误差。     

FeO高温气－固还原动力学研究

在１１８０～１３３０℃，通过测定浮氏体颗粒在流化床中被ＣＯ还原的反应速度，并应用未反应核模型处理数据，得到还原反应速度方程和表观活化能．研究表明氧离子在还原后生成铁层中的团相扩散为还原过程的限制性环节，但是过程呈现明显的两段速度特征．在反应后期（ｆ＞６５％左右），由于生成铁相发生晶格转变，使氧离子在铁层中的扩散更为困难，故反应的活化能增大，反应速度明显减慢．通过扫描电镜（ＳＥＭ）对生成铁层结构变化的研究，也进一步证实了这一点．     

新指示反应测定痕量钒的研究及应用

测定痕量钒的报道已有不少．本文研究了钒的另一新指示反应．在稀Ｈ２ＳＯ４介质中，ＫＢｒＯ３氧化碱性染料孔爸绿褪色反应缓慢，有抗坏血酸存在时．痕量量钒折加入使褪色反应速度显著加快．确立了最佳反应条件，测定了表观活化能，建立了高灵敏测定痕量锐的催化光度新方法．方法检出限为２．１４×１０－１２ｇ／ｍｌ．线性范围为０—２０ｎｇ／２５ｍｌ．用于发样、水样中痕量钒的测定，结果满意．     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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