乙烷氧化反应的瞬变应答研究：C2H6在Mn2O3催化剂上…

本文使用瞬变应答技术，研究了Ｃ２Ｈ６在Ｍｎ２Ｏ３催化剂上的氧化反应。根据产物ＣＯ２分别对反应物Ｃ２Ｈ６和Ｏ２的浓度阶跃变化结果，证实Ｃ２Ｈ６的催化氧化反应，必须经历催化剂表面上Ｏ２（吸附态）和Ｃ２Ｈ６（吸附态）的反应步骤，总反应的ＲＤＳ是催化剂表面上吸附态Ｃ２Ｈ６分子的形成。实验还证实了ＣＯ２不影响Ｃ２Ｈ６氧化反应的速率，而Ｈ２Ｏ对此反应有禁阻作用。     

乙烷氧化反应的瞬变应答研究──C_2H_6在Mn_2O_3催化剂上氧化反应的速

本文使用瞬变应答技术，研究了Ｃ２Ｈ６在Ｍｎ２Ｏ３催化剂上的氧化反应。根据产物ＣＯ２分别对反应物Ｃ２Ｈ６和Ｏ２的浓度阶跃变化结果，证实Ｃ２Ｈ６的催化氧化反应，必须经历催化剂表面上Ｏ２（吸附态）和Ｃ２Ｈ６（吸附态）的反应步骤，总反应的ＲＤＳ是催化剂表面上吸附态Ｃ２Ｈ６分子的形成。实验还证实了ＣＯ２不影响Ｃ２Ｈ６氧化反应的速率，而Ｈ２Ｏ对此反应有禁阻作用。     

非均相催化氧化法处理氨基J酸工业废水

文章采用Ｈ２Ｏ２－ＴｉＯ２催化氧化法处理氨基Ｊ酸工业废水。实验结果表明：当每Ｌ废水中加入０．２ｇＴｉＯ２及Ｈ２Ｏ２∶ＣＯＤｃｒ＝２．０ｇ·ｇ－１,在９０℃下反应０．５ｈ时,氨基值及ＣＯＤｃｒ的去除率分别达到８５．４％和６９．８％。且催化剂ＴｉＯ２无毒、易分离,经高温活化后可重复利用     

阻燃剂聚二溴苯醚的合成

分别利用Ｋ３Ｆｅ（ＣＮ）６，ＣｕＣｌ２·２Ｈ２Ｏ－ＤＭＳＯ，Ｃｕ（ＮＯ３）２·３Ｈ２Ｏ－ＣＨ３ＣＮ，ＣｕＣｌ２·２Ｈ２Ｏ－ＤＭＦ，ＣｕＣｌ２·２Ｈ２Ｏ－ＮａＯＣＨ３，等５种不同催化体系制备了阻燃剂聚二溴苯醚，并详细地研究了其中３种催化体系中的单体浓度、催化剂用量、反应温度以及反应时间对产率的影响，找到了合成的最佳条件，并讨论了几种催化体系的反应机理。５种催化体系所得产物存在着分子量由大到小的分布，     

CaO(C),La_2O_3/CaO(LC)和SrO-La_2O_3/CaO(SLC)催化剂上的甲烷氧化偶联V:催化剂对产物C_2烃氧化的抑制作用

Ｃ，ＬＣ和ＳＬＣ催化剂上的甲烷氧化偶联及其相应的Ｃ２产物的催化氧化和它们的气相反应的研究结果表明：这些催化剂明显地抑制Ｃ２Ｈ４的氧化反应，其抑制能力由小到大按Ｃ，ＬＣ，ＳＬＣ顺序增加．而在甲烷氧化偶联反应中，Ｃ２产率和选择性同样按此顺序增加．这表明在甲烷氧化偶联反应中，催化剂Ｃ，ＬＣ，ＳＬＣ起着抑制Ｃ２Ｈ４产物深度氧化的作用．这一顺序也同ＣＯ２ＴＰＤ表征的催化剂碱强度顺序一致．关联结果说明：这种抑制效应可能与催化剂的内在碱性有关．研究同时表明：在优化组成的ＳＬＣ催化剂上的甲烷氧化偶联反应中，Ｌａ２Ｏ３可能有利于·ＣＨ３自由基的产生；ＣａＯ有利于产物Ｃ２Ｈ６的氧化脱氢生成Ｃ２Ｈ４；而ＳｒＯ的引入则对最终产物Ｃ２Ｈ４的深度氧化起着抑制作用．     

施氏矿物催化降解4-氯苯酚性能研究

本文选取人工合成施氏矿物作为类芬顿催化剂在过氧化氢的作用下催化降解4-氯苯酚,通过考察pH值,过氧化氢,催化剂施氏矿物用量因素的影响.研究结果表明,当反应溶液pH为3,过氧化氢的浓度为500mg/L,施氏矿物用量1g/L,30min中可以完全降解100mg/L的4-氯苯酚,证明施氏矿物是高效的非均相催化剂.研究发现反应遵循自由基反应机理,施氏矿物催化分解过氧化氢产生羟基自由基进而实现催化降解4-氯苯酚.     

硫化铁催化剂的制备,表征及对H2S制H2反应的研究

用不同方法制备了几种硫化铁催化剂，研究了其对Ｈ２Ｓ分解制取氢气反应的催化性能。用ＴＰＲ、ＸＲＤ、ＴＰＯ、ＤＴＡ及表面积测定等手段对反应前后的催化剂进行了表征。结果表明，以机械混合的超细粒子α－ＦｅＯ２Ｏ３和γ－Ａｌ２Ｏ３为催化剂的先驱物时，其反应性能最佳。     

HTH—4液晶聚酯合成路线的改进

以对羟基苯甲酸甲酯和１，４－丁二醇为原料，在酯交换催化剂Ｔｉ（ＯＣ４Ｈ９－ｎ）４／Ｓｎ（ｎ－Ｃ４Ｈ９）２（Ｃ１１Ｈ２３ＣＯＯ）２存在下，采用熔融酯交换反应合成出单体：双（对羟基苯甲酸）丁二醇酯（ＢＢＨＢ）。然后再与对苯二甲酰氯分别在３种不同的溶剂中进行溶液缩聚，合成出３个不同分子量的ＨＴＨ－４聚合物样品，并用ＤＳＣ、ＰＯＭ对其液晶性进行了表征。     

酚类化合物酶处理反应机理初探

研究了辣根过氧化物酶处理酚和氯酚的反应机理和动力学特征。根据酶反应动力学特征判断辣根过氧化物酶催化酚和氯酚氧化耦合反应属于乒乓双双反应机制。阐明了Ｈ２Ｏ２抑制机理,测定了酶反应中Ｈ２Ｏ２抑制的动力学参数。通过测定不同底物酶反应的动力学参数,比较了取代基数目及取代位置对酶反应的影响。     

对羟基苯甲酸乙酯合成的新方法

研究了以ＦｅＣｌ３．６Ｈ２Ｏ为固体催化剂,由既作反应物又作溶剂的９５％乙醇和对羟基苯甲酸为原料合成对羟基苯甲酸乙酯,并讨论了催化的各种影响因素,实验表明,固体ＦｅＣｌ３．６Ｈ２Ｏ是合成对羟基苯甲酸乙酯的良好催化剂,最佳的反应条件为：醇酸摩尔比为２：１、催化剂与酸的摩尔比为０．１２：１、反应时间为３ｈ、回流温度。上述条件下,其收率高于７７．５％,含量９８％以上。     

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