V—Mg—O催化剂用于丁烷氧化脱氢制丁二烯和丁烯

制备了用于烷氧化脱氢制丁二稀的Ｖ－Ｍｇ－Ｏ催化剂，ｍ（Ｖ２Ｏ５）／ｍ（ＭｇＯ）、催化剂焙烧温度对转化率和选择性有较大的影响，２４－Ｖ－Ｍｇ－Ｏ催化剂具有较高的活性和Ｃ４（Ｃ４Ｈ８和Ｃ４Ｈ６）选择性，当反应温度为８７３Ｋ、原料气组成为ｎ（Ｃ４Ｈ１０）／ｎ（Ｏ２）／ｎ（Ｎ２）＝４／８／８８时，收率达到３２％。     

甲烷脱氢芳构化W／HZSM—5基催化剂EPR研究

利用ＥＰＲ等谱学方法,对Ｗ／ＨＺＳＭ－５基催化剂上Ｗ物种的价态及其在Ｈ２预还原过程中的动态行为进行了表征研究．结果表明,由碱性前驱液制备的Ｗ／ＨＺＳＭ５催化剂在１０７３Ｋ、Ｈ２预还原条件下只能还原产生一类主要Ｗ物种,Ｗ５＋;而由酸性前驱液制备的Ｗ－Ｈ２ＳＯ４／ＨＺＳＭ－５催化剂在相同反应条件下则可还原产生两类共存的Ｗ物种,Ｗ５＋和Ｗ４＋．关联到在相同的甲烷脱氢芳构化（ＤＨＡＭ）反应条件下Ｗ－Ｈ２ＳＯ４／ＨＺＳＭ－５对ＤＨＡＭ反应的催化活性比Ｗ／ＨＺＳＭ－５高得多的实验事实,可以推断,ＤＨＡＭ反应活性与催化剂上较高价态Ｗ物种（Ｗ５＋）的浓度并不存在顺变关系,而与Ｗ４＋物种的浓度则密切相关．     

用SO_4(2-)/FeZnZSM催化剂液相合成乙酸丁酯

用浸渍法混合负载铁、锌、硫酸，研制出一种ＳＯ４２－／ＦｅＺｎＺＳＭ分子筛催化剂，用正交试验法分别探讨了负载浓度、焙烧温度、酸醇摩尔比以及催化剂用量对催化活性的影响，用ＩＣＰ、ＸＲＤ、ＤＴＡ、ＴＧ、ＳＳＡ、ＮＨ３－ＴＰＤ等技术对催化剂的物化性能进行了表征．结果表明：研制出的ＳＯ４２－／ＦｅＺｎＺＳＭ催化剂对酯化反应具有良好的催化活性，选择性达１００％．在１２２℃，酸醇摩尔比为１∶１．０８时，反应３小时后，乙酸的转化率达９７．６３％．因催化剂制备成本低，催化剂热稳定性好，机械强度高，可望有开发应用价值．     

用离子交换树脂－Pd催化丙酮和氢气一步法合成甲基异丁基酮的研究

以较为简便的方法制备了几种离子交换树脂－Ｐｄ催化剂，并将此类双功能催化剂用于丙酮和氢气一步法合成甲基异丁基酮（ＭＩＢＫ）．实验发现，催化剂的吸氢越大，反应选择性越好；而其交换容量过高则降低了选择性，升高温度有利于提高反应活性和选择性，但有一适宜值增大丙酮空速（ＬＨＳＶ）降低了反应活性和选择性，压力对反应影响不大．在各种树脂－Ｐｄ催化剂中Ｐｄ－干氢树脂（Ｐｄ－ＤＨ）的性能最好．在较佳的反应条件：温度１３０℃，压力２ＭＰａ，ＬＨＳＶ５ｈ－１，氢酮比０．４下，用ｐｄ—ＤＨ催化合成ＭＩＢＫ，丙酮转化率为４８％，ＭＩＢＫ选择性可达９８％．     

低浓度甲醇完全氧化钙钛矿型La1-xSrxMnO3催化剂研究

采用溶胶－凝胶法制备钙钛矿型复合氧化物Ｌａ１－ｘＳｒｘＭｎＯ３,研究其对低浓度甲醇完全氧化催化性能．实验结果表明：Ｓｒ２＋取代量和样品焙烧温度对催化剂活性均有显著影响,以８７３Ｋ焙烧的Ｌａ０．６Ｓｒ０．４ＭｎＯ３的催化活性为佳;催化剂的ＢＥＴ,ＸＰＳ,Ｏ２－ＴＰＤ,Ｈ２－ＴＰＲ表征研究结果证实,较大的比表面,较高的表面Ｍｎ浓度和氧吸附量都有利于催化剂活性的提高．     

溴化苄对二乙基胺甲基膦酸锆的季铵化及三相催化反应

首次制得二乙基胺甲基膦酸锆－亚磷酸锆Ｚｒ（ＨＰＯ＿３）＿（２－ｘ）·（Ｏ＿３ＰＣＨ＿２ＮＥｔ＿２）＿ｘ·Ｈ＿２Ｏ（ＺＤＥＡＭＰ－ＺＰ，ｘ＝０．７５，０．６０，０．５０）．将ＺＤＥＡＭＰ－ＺＰ用溴化苄季铵化，得到部分季铵化的产物：溴化苄基二乙基铵甲基膦酸锆－二乙基胺甲基膦酸锆－业磷酸锆Ｚｒ（ＨＰＯ＿３）＿（２－ｘ）·（Ｏ＿３ＰＣＨ＿２ＮＥｔ＿２）＿（ｘ－ｙ）·（Ｏ＿３ＰＣＨ＿２Ｎ￣＋Ｅｔ＿２·ＣＨ＿２Ｐｈ·Ｂｒ￣－）＿ｙ·Ｈ＿２Ｏ（Ｙ＜Ｘ，ＺＢＤＥＡＭＰＢ－ＺＤＥＡＭＰ－ＺＰ）．ＺＢＤＥＡＭＰＢ－ＺＤＥＡＭＰ－ＺＰ用于进行液／固／液或固固／液三相催化的亲核取代成醚、卤代烃和羧酸盐合成酯及二氯卡宾加成反应，均得到良好的结果。催化剂易于分离和回收，通常回收７０％～１００％，催化剂重复使用１０次以上无明显失活。     

聚乳酸／羟基磷灰石复合材料的研究Ⅱ.聚乳酸／羟基磷灰 …

和熔融共混和溶液－超声分散复合方法制备了聚（ＤＬ－乳酸）（ＰＤＬＬＡ）／超细微羟基磷灰石（ＨＡ）复合物,并用取向模压法制得φ３．２ｍｍ的圆棒。两种制备复合物方法均使ＰＤＬＬＡ相对分子质量降低２５％～２８％,但后一方法可得到ＨＡ粒子均匀分布的复合物。模压温度对圆棒的弯曲强度有很大影响。在较低的温度模压,由于模坯在模压过程中发生较大的取向形变,可得到较高的弯曲强度的圆棒,ＰＤＬＬＡ最高可达１５０ＭＰａ     

食用油烟对大鼠体内脂质过氧化反应的影响

本研究采用动式染毒技术，将大鼠分成４个浓度组吸入豆油油烟（油温２２０℃），观察血中ＳＯＤ，ＧＳＨ，ＭＤＡ含量，肺组织中ＬＤＨ，ＡＣＰ，ＭＤＡ和肺巨噬细胞（ＰＡＭ）膜脂流动性（ＬＦＵ）等指标的变化，探讨吸入油烟的急性毒作用机理。实验结果表明：油烟平均浓度为１．０５ｍｇ／ｍ＾３时，血浆及肺组织中ＭＤＡ开始增加（Ｐ〈０．０５），且含量随吸入油烟量增加；平均浓度为９．５８ｍｇ／ｍ＾３时，全血ＳＯＤ活力明显     

简易多用微型实验装置

简易多用微型实验装置邹荣贤（四川师范学院化学系，南充６３７００２）ＡＳＩＭＰＬＥＢＵＴＭＵＬＴＩ－ＰＵＲＰＯＳＥＭＩＮＩ－ＥＸＰＥＲＩＭＥＮＴＤＥＶＩＣＥ￥ＺｈｏｕＲｏｎｇｘｉａｎ（Ｄｅｐｔ．ｏｆＣｈｅｍｉｓｔｒｙ，ＳｉｃｈｕａｎＴｅａｃｈｅｒｓＣｉ...     

录象脑电图与神经影像学检查对部分性癫痫定位诊断

利用灵象脑电图加强监测，９９ｍ＾ＴＣ－ＨＭＰＡＯ－ＳＰＥＣＴ，＾１２３Ｊ－Ｉｏｍａｚｅｎｉｌ－ＳＰＥＴ，ＭＲＩ对４０例局限性癫痫患者进行研究。分析发作期及发作间歇期Ｖｉｄｅｏ／ＥＥＧ的结果：３８例（８２％）表现局限性癫痫样活动ｍ，＾９９ｍＴＣ－ＨＭＰＡＯＳＰＥＣＴ局部脑血流异常２１例（５２％），＾１２３Ｊ－Ｉｏｍａｚｅｎｉｌ－ＳＰＥＣＴ局部脑苯二氮卓受体密度减低２５例（６３％），ＭＲＩ结构异常１８     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-