异丁醇的内扩散对－0．6级速度方程的影响

在Ｐｔ／Ａｌ２Ｏ３催化剂上，用外循环无梯度反应器研究了异丁醇内扩散对异丁醇完全氧化动力学的影响。用０．４５～０．６０ｍｍ催化剂，反应在动力学区域进行，异丁醇完全氧化的动力学用－０．６级速度方程描述。当催化剂颗粒增大到４ｍｍ时，反应受内扩散控制，在内扩散区域异丁醇反应级数变为－０．０１级。测定了催化剂有效因子η，其值在０．２１～０．６１之间。它表明孔扩散阻力严重。在温度恒定时，ηｅｘｐ值随异丁醇分压的升高而增加。在异丁醇分压固定时，ηｅｘｐ值随反应温度升高而下降。反应在动力学区域时，异丁醇完全氧化的活化能为２６．０ｋＪ／ｍｏｌ，而在内扩散区域时，反应活化能为２３．７ｋＪ／ｍｏｌ。     

粗苯常压加氢精制(第一报)

采用常压进行粗苯加氢精制,考察了三种不同类型几拾今催化剂之活性及不同操作条件下的加氢精制效果已获得初步结果。研究证实了粗苯可在常正下进行加氢精制。以情制产品的不饱和键加氢和脱硫百分率为指标比较了上述催化剂获得了具有较高初活性的６０１０７催化剂以煤气加氢其初活性为不饱和键加氢百分率 ９０％（溴价 ０．２４克／１００克）脱硫率 ９２％ （０．０１５克／１００克）。采用氢气其结果为不饱和键加氢百分率９７～９９％（澳价０．２～０．０６／１００克）脱硫百分率 ９７～９９％（０．００６～０·００１４克／１００克）。其最适宜工艺条件为：温度３５℃ 空速 ０．５寸－１气／油＝１０００。     

钨杂多酸／膨润土的表面酸性和酯化催化活性

以天然膨润土为原料,经净化、过筛、强酸处理和高温灼烧得活性白土,再用不同质量百分数的磷钨酸溶液,对活性白土进行负载得到磷钨酸／膨润土催化剂．以Ｈａｍｍｅｔ指示剂正丁胺滴定法测定催化剂表面酸强度及表面酸量按强度的分布,并与气固相催化合成甲酸乙酯的催化活性相关联,考察了催化剂的酸催化活性与表面酸性的关系．实验结果表明：制备的磷钨酸／膨润土催化剂表面酸强度分布在－１２．７０≤Ｈ０≤－８．２０、－１３．１６≤Ｈ０≤－１２．７０、－１３．７０≤Ｈ０≤－１３．１６、－１４．５２≤Ｈ０≤－１３．７０、Ｈ０≤－１４．５２范围内对酯化反应贡献分别为２．９２％、２４．１４％、８３．９１％、７．１０％、－１８．０６％．可见,影响酯化产率的主要因素是催化剂表面酸强度分布,不同酸强度的酸中心对催化酯化反应贡献不同．     

异丁醇的内扩散对—0.6级速度方程的影响

在Ｐｔ／ａＬ２ｏ３催化剂上，用外循环无梯度反应器研究了异丁醇内扩散对异丁醇完全氧化动力学的影响。用０．４５￣０．６０ｍｍ催化剂，反应在动力学区域进行，异丁醇完全氧化的动力学用－０．６级速度方程描述。当催化剂颗粒增大到４ｍｍ时，反应受内扩散控制，在内扩散区域异丁醇反应级数变为－０．０１级。测定了催化剂有效因子η，其值在０．２１￣０．６１之间。它表明孔扩散阻力严重。在温度恒定时，ηｅｘｐ值随异丁醇分压     

改进型铜基甲醇合成催化剂的制备研究

在三组分铜基催化剂Ｃｕ－Ｚｎ－Ａｌ中添加少量第四组分金属氧化物助剂ＭＯ＿ｘ，制得改进型四组分铜基甲醇合成催化剂Ｃｕ－Ｚｎ－Ａｌ－Ｍ（ＸＨ４０２）；５．０ＭＰａ压力下的活性评价结果表明ＸＨ４０２催化剂合成甲醇时空得率比工业甲醇合成催化剂Ｃ３０１提高２５％。催化剂的ＸＲＤ表征显示，工作态ＸＨ４０２催化剂的活性相特征峰２θ＝４３．３２°的强度比Ｃ３０１的提高约３０％。     

ACC氧化酶的测定方法

利用番木瓜ＣａｒｉｃａＰａｐａｙａＬ．果实为材料，研究了１－氨基环丙烷－１－羧酸（ＡＣＣ）氧化酶的体内和体外测定方法．在ＡＣＣ氧化酶的体外分析中，甘油体积分数为１０％～３０％时能稳定酶的活性；φ（ＣＯ２）为０．３％～２０％（反应体系气相中）和０．５～１２ｍｍｏｌ／ＬＡＣＣ提高酶的活性；较适宜的ｐＨ值为７．２．     

在奇异项上叠加有限元法计算应力强度因子

虽然目前计算应力强度因子的有限元法已有很多种，但是由于裂纹尖端存在奇异性，问题仍然相当繁复。本文采用在奇异项上叠加普通有限元法来确定应力强度因子，从而大大简化了问题，并提高了结果精度。例如对于承受均匀拉伸单边裂纹板，当裂纹长度与板宽之比为０．５及０．８时，应力强度因子的误差分别为２．８％及３．５％。     

乙烯气相聚合高效催化剂的组成和聚合反应

研究了２种类型的乙烯气相聚合高活性催花剂．用ＳｉＯ２,ＭｇＣｌ２作复合载体,负载ＴｉＣｌ４制得的ＳＭ型催化剂,载体中含ｗ（Ｔｉ）为２％～３％,ｗ（Ｔｉ３＋）为３５％～５９％,比表面积１０５～１２０ｍ２／ｇ,催化活性每小时每克催化剂Ｔｉ催化得５．０～５．７ｋｇ产物ＰＥ（ｋｇ·ｇ－１·ｈ－１）,聚合动力学曲线为衰减型．用镁粉、卤代烷、四氯化钛为主要组分制备的ＭＧ－２型催化剂,载体中ｗ（Ｔｉ）为６％～７％,ｗ（Ｔｉ３＋）为５５％～６９％,比表面积７０～８５ｍ２／ｇ,催化活性１．８～２．０ｋｇ·ｇ－１·ｈ－１,聚合动力学曲线为平稳型．对ＳＭ型催化剂扫描电镜及图象分析得到颗粒平均粒径（ｄ）,颗粒长短轴比（ｄｌ／ｄｓ）及颗粒大小粒径比（ｄｍａｘ／ｄｍｉｎ）分别为３１μｍ,１．４０２,４．１,ＭＧ－２型催化剂为３３μｍ,１．５２４,７．０,相应聚合产物颗粒的ｄ,ｄｌ／ｄｓ,ｄｍａｘ／ｄｍｉｎ,ＳＭ型催化剂为２４７μｍ,１．２９５,４．６,ＭＧ－２型催化剂为２６３μｍ,１．５４０,９．０．显示出ＳＭ催化剂更优良的聚合性能．     

富硒灵芝的研究

研究了富硒灵芝培育的条件，结果表明，培养基ｐＨ值、硫素营养和硒素营养对灵芝富硒有显著影响．ｐＨ值３．０～５．０，硫浓度１５００ｍｇ／ｋｇ以下，硒浓度５０～３００ｍｇ／ｋｇ的棉籽壳培养基适合培养硒含量２０～１２４μｇ／ｇ，有机硒占８５％的富硒灵芝．     

渤海冰尺寸效应的实验研究

在１９８４～１９８６年冬李．对渤海湾海冰压缩强度、拉伸强度和断裂韧性的尺寸效应进 行了系列的实验研究，并应用 Ｗｅｉｂｕｌｌ统计公式进行了计算，结果与实验符合得很 好。以几何尺寸相似的比例试样测得的拉伸强度．单轴压缩强度及断裂韧性ＫＩＣ值与 各自的计算值相比较其误差分别小于０．３％，３．９％和 ２．２％．研究表明，用 Ｗｅｉｂｕｌｌ 理论来说明渤海湾海冰的尺寸效应是非常适合的。     

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