刀具温度场对刀具表面覆盖膜的影响

研究了ＴｉＣ类硬质合金刀具切削Ｃａ－Ｓ易切不锈钢时，刀具温度场及其对刀具表面覆盖膜的影响。结果表明，覆盖膜形成时，在距主切削刃０．２５－０．５ｍｍ范围内，靠近前刀面处垂直前刀面的温度梯度比无覆盖膜时的温度梯度小得多，使覆盖膜／前刀面间的温度在切上过程中维持在８８０－５８０℃之间，为形成稳定覆盖膜创造了最佳温度环境。     

M(Pr,Ag)替代的La212型化合物的相变和晶体结构

用固态反应法制备了Ｍ（Ｐｒ,Ａｇ）替代的Ｌａ２１２型化合物,发现Ｌａ２－ｘＳｒｚＣ０．５Ｐｒ０．５Ｃｕ２Ｏ６,Ｌａ１７６Ｐｒ０．４Ｃａ１－ｘＰｒ２Ｃｕ２Ｏ６和Ｌａ２－ｘＰｒｘＣａ０．５Ｓ０。．５Ｃｕ２Ｏε单相范围的ｘ值分别是０．４－１．１,０－０．５和０－１．５。     

湿化学法制备钙钛矿型La_（1－x）Sr_xMnO_3的电学性能及其晶体学研究

采用湿化学法制备了粒度在０．２～０．８μｍ范围的钙钛矿型Ｌａ（１－ｘ）Ｓｒ＿ｘＭｎＯ＿３粉末，用室温和高温Ｘ衍射法测定其晶体结构。发现其在１２００℃高温发生了四方→立方的相变；制备的粉末粒度与水浴温度有一定的关系，在室温时电阻率在６．０×１０￣（－３）～６．９×１０￣（－３）Ω·ｃｍ范围内，在温度大于４５０℃后，随着温度的升高，电阻率亦升高。     

Co－Sn替代钡铁氧体的制备及其磁性

用化学共沉淀工艺制备了可望用作高密度垂直磁记录介质的Ｃｏ－Ｓｎ替代钡铁氧体系列微软样品ＢａＦｅ＿（１２－２ｘ）Ｃｏ＿ｘＳｎ＿ｘＯ＿（１９），其中ｘ可取值为０，０．２，０．４，０．５，０．６，０．８，１．２．给出了最佳制备条件：反应温度ｔ＝８０℃，体系的ｐＨ值ｐＨ＝１１．８，热处理温度Ｔ＿ｈ＝９２５℃。对所制备的系列样品进行了透射电镜（ＴＥＭ）观测和ｘ光衍射（ＸＲＤ）测试，给出了颗粒的形貌和大小以及晶体结构和晶格常数。用振动样品磁强计（ＶＳＭ）对宏观磁性进行了测试，给出了宏观磁性与替代浓度关系。     

面心立方萤石结构Ce_（1－x）Tb_xO_（2－δ）固溶体的氧缺欠研究

以热重量法研究了Ｃｅ１－ｘＴｂｘＯ２－δ（ｘ＝０．３，０．４，０．５）的缺氧分数６值．发现δ值随组成、环境氧分压和温度的不同在０．０６—０．４范围内变化．样品ＣＴ３０和ＣＴ５０于６５０℃以上温度在空气中失氧形成氧空位的反应热熔经估算分别为３６．０和４０．６ｋＪ／ｍｏｌ．研究表明，该数值主要由Ｔｂ离子的反应性决定，该复合氧化物中Ｃｅ离子的还原反应热焓显著小于它在纯ＣｅＯ２－δ中的数值．     

Er（Ni1—xCox）磁性蓄冷材料的研究

研究了实用型Ｅｒ（Ｎｉ１－ｘＣｏｘ）（ｘ＝０，０．１，０．２）材料的制备方法和它们的物理性能。用Ｃｏ部分替代Ｎｉ后，该材料的居里温度降至１０Ｋ范围内，在温度低于１０Ｋ的温区内，Ｅｒ（Ｎｉ１－ｘＣｏｘ）（ｘ＝０，０．１，０．２）材料的比热容远大于传统的蓄冷材料金属Ｐｂ和其他新型Ｅｒ系磁性蓄冷材料的比热容，磁墒变计算结果表明，Ｅｒ（Ｎｉ１－ｘＣｏｘ）（ｘ＝０，０．１，０．２）材料的Ｅｒ＾＋３离子有效Ｊ     

连续定向凝固过程铜铬合金的组织与缺陷

研究了铜铬合金的连续定向凝固的工艺条件及相互之间的匹配关系,以及铜铬合金的显微组织及其表面缺陷形成的成因,结果表明,结晶器高度１０－２５ｍｍ,冷却距离２５ｍｍ,合金温度１２１０－１２８０℃,牵引速度０．２－１．０ｍｍ／ｓ,冷却水量７２０Ｌ／ｈ时,可制得Ｃｕ－０．６％Ｃｒ合金材料。     

面心立方萤石结构Ce1—xTbxO2—δ固溶体的氧缺欠研究

以热重量法研究了Ｃｅ１－ｘＴｂｘＯ２－δ（ｘ＝０．３，０．４，０．５）的缺氧分数δ。发现δ值随组成、环境氧分压和温度的不同在０．０６－０．４范围内变化。样品ＣＴ３０和ＣＴ５０于６５０℃以上温度在空气中失氧形成氧空位的反应焓经估算分别为３６．０和４０．６ＫＪ／ｍｏｌ。     

环己酮与酚类化合物二元系的固液相平衡

测制了ｘＣ６Ｈ１０Ｏ＋（１－ｘ）ｏ－ＣＨ３Ｃ６Ｈ４ＯＨ和ｘＣ６Ｈ１０Ｏ＋（１－ｘ）ｍ－ＣＨ３Ｃ６Ｈ４ＯＨ固液平衡相图,此体系均形成１１固体化合物,化合物熔点分别为２４１．００和２６１．６０Ｋ．２个体系都由２个低共熔点组成．前１个体系的低共熔点组成和温度分别为ｘ＝０．３９７,Ｔ＝２３２．５４Ｋ和ｘ＝０．７９４,Ｔ＝２１０．２６Ｋ,后１个体系为ｘ＝０．２４４,Ｔ＝２４４．７５Ｋ和ｘ＝０．９２７,Ｔ＝２１９．１９Ｋ．测得环己酮的晶型转变温度为２２０．２４Ｋ．可认为化合物是由于甲酚中羟基氢原子与环己酮中羰基氧原子通过氢键作用而形成．     

银丝汞膜电极伏安法测定药品中头孢氨苄

本文以银丝汞膜电极为工作电极，在０．１０ｍｏｌ／ＬＮａＯＨ溶液中经１００℃水浴加热２０ｍｉｎ后，用线性扫描伏安仪制作ＣＥｘ的阴极还原曲线，其峰电位－０．７５Ｖ（ＶＳＡｇ／ＡｇＣｌ），浓度在２．０×１０－７～２．１０×１０－６ｍｏｌＬ－１；２．０×１０－６～２．０×１０－５ｍｏｌＬ－１范围内，峰高与浓度呈线性关系，其线性回归方程ｉ（格）＝１．２８６×１０６ｃ－０．１５０４（ｒ＝０．９９５８，ｃ：２．０×１０－５～２．０×１０－６ｍｏｌ／Ｌ）；ｉ（格）＝１．２３×１０６＋０．７８７０（ｒ：０．９９７３，ｃ＝２．０×１０－６～２．０×１０－７ｍｏｌＬ－１）．方法应用于胶囊中ＣＥｘ的含量测定并与药典法相比，结果基本一致．此外利用循环伏安等方法对其降解产物电化学行为进行初探，该体系属于准可逆吸附体系．     

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