两种高强度钢丝低周疲劳寿命的研究

本文采用恒应变幅（△ε）低周疲劳试验方法，测定了高碳Ｐａｔｅｎｔｉｎｇ高强度钢丝和低碳ＬＡＨＳ钢丝的循环应力幅（△σ）和最大应力（σｍａｘ）与循环周次（Ｎ）之间的关系。研究了温形变处理对钢丝低周疲劳寿命的影响。得出，温形变处理可提高低周疲劳寿命３０％～３５％。对这类钢丝的低周疲劳损伤进行了评价。     

群作用下的分歧定理

在紧致李群Ｇ作用下的Ｂａｎａｃｈ空间Ｘ中,利用等变严格集压缩场的零点指标公式,讨论了Ｇ等变映射ｆ∈Ｃ１（Ｘ×Ｒ,Ｘ）在零点轨道Ｎ＝Ｇ（ｘ０）和管状邻域Ω上的分歧问题ｆ（ｘ,λ）＝ｘ－σ（ｘ）－λＡ（σ（ｘ））（ｘ－σ（ｘ））＋Ｒ（ｘ,λ）＝０,所得结论推广了Ｒａｂｉｎｏｗｉｔｚ的大范围分歧定理．其中σ：Ω→Ｎ是Ｇ等变投影,Ａ（ｘ０）是严格集压缩,Ｒ是高阶无穷小量．     

A633D 钢疲劳寿命的实验研究

本文介绍了Ａ６３３Ｄ钢的等概率疲劳寿命曲线（Ｐ—Ｓ—Ｎ曲线）的测定方法，为掌握Ａ６３３Ｄ钢的疲劳性能，提供了可靠性设计依据。     

18Cr2Ni4WA钢的组织特征尺寸与其疲劳极限

研究了１８Ｃｒ２Ｎｉ４ＷＡ钢的奥氏体实际是精度和马氏体束径对其疲劳极限的影响．结果表明，这种钢的疲劳极限σｗ与其原奥氏体晶粒度或马氏体板条束径尺寸ｄ的关系为σｗ＝Ｃ＋ｋｄ（－１／２）（Ｃ，ｋ均为常数）；马氏体束径ｄＭ和原奥氏体晶粒度ｄＡ之间的关系为ｄＭ（－１／２）＝Ｃ＋ｄＡ（－１／２）．通过测量钢的组织特征尺寸估算其疲劳性能．     

关于具有足够幂等元的强分次环上的分次Morita对偶

设Ｇ和Г分别是单位元为ｅ和ε的乘群，Ｒ＝＋ｇ∈ＧＲｇ和Ａ＝＋σ∈ГＡσ辊具有足够幂等元的Ｇ－型和Г型强分次环，Ｕ＝＋ｇ∈Ｇσ∈ГＵσ是单式双分次（Ｒ，Ａ）－双模，Ｋ－ｃＵε，Ｍ（Ｎ）是所有Ｕ－反射单式分次左Ｒ－（右Ａ－）模组成的Ｒ－ｇｒ（ｇｒ－Ａ）的完全子范畴，Ｃ（Ｄ）是所有Ｋ－反射单式在Ｒｅ－（右Ａε）模组成的Ｒｅ－ｍｏｄ（ｍｏｄ－Ａε）的完全子范畴。     

概率的完全可加性与连续性的等价性

从有限到无限是贯穿高等数学的基本思想，而连续性在其中占有相当重要的地位，概率论这门学科已遍及各个领域、是解决大多数问题的基本工具，应用广泛，十分重要。本文就概率的连续性与可加性作一点讨论。１　概率为有限可加加连续等价于可列可加定义１　若Ａｉ∈Ｆ，ＡｉＡｉ＋１，（ｉ∈Ｎ＼｛０｝），令Ａ＝∩∞ｉ＝１Ａｉ且Ｐ（Ａ）＝Ｐ（ｌｉｍｎ∞Ａｎ）＝ｌｉｍｎ∞Ｐ（Ａｎ），则说概率是上连续的。定义２　若Ａｉ∈Ｆ，ＡｉＡｉ＋１，（ｉ∈Ｎ＼｛０｝），令Ａ＝∪∞ｉ＝１Ａｉ且Ｐ（Ａ）＝Ｐ（ｌｉｍｎ∞Ａｎ）＝ｌｉｍ…     

自紧身管疲劳寿命的概率断裂力学分析

该文基于概率断裂力学理论和ＭｏｎｔｅＣａｒｌｏ模拟给出了自紧身管疲劳寿命的可靠性分析方法。实例分析结果表明，身管疲劳寿命远大于其弹道寿命，内裂纹寿命结果大于外裂纹情形，对数正态分布为疲劳寿命的最佳分布。     

自紧身管疲劳寿命的概率断列力学分析

该文基于概率断裂力学理论和ＭｏｎｔｅＣａｒｌｏ模拟给出了自紧身管疲劳寿命的可靠性分析方法，实例分析结果表明，身管疲劳寿命远大于其弹道寿命，内裂纹寿命结果大于外裂纹情形，对数正态分布为疲劳寿命的最佳分布。     

(Bu_4N)_2Mo(mnt)_3的晶体结构

（Ｂｕ４Ｎ）２ＭＯ（ｍｎｔ）３系针状墨绿色晶体，晶胞参数，ａ＝１０．２０８（６）Ａ；ｂ＝１５．８４１（５）Ａ；ｃ＝１８．００３（３）Ａ；α＝８６．６７（２）°；β＝８４．２０（４）°γ＝１０７．７４（４）°，空间群Ｃ＇ｉ－ＰＴ；Ｚ＝２；ρｏｂｓ＝１、２１８，ρｃαｌｃ＝１．２１０克／厘米３．在四园衍射仅上收录 Ⅰ≥１σ（Ⅰ）独立衍射点３０３５个，晶体结构由三维Ｐａｔｔｅｒｓｏｎ函致和电子密度函数解出，经全矩阵最小二乘法精修，偏离因子Ｒ＝０．０８７．结构分析结果表明，晶体结构由Ｍｏ［Ｓ２Ｃ２（ＣＮ２］２－３和［Ｎ（Ｃ４Ｈ９）］４＋构成。阴离子Ｍｏ［Ｓ２Ｃ２（ＣＮ）２］２－３是由三个配位体［Ｓ２Ｃ２（ＣＮ）２］２－中的二个Ｓ原子与Ｍｏ原子螯合，基本上成三棱柱方式配位．     

新型1,4—二氮丁二烯液晶材料的合成及晶体结构？…

报道了９个新型１,４－二氮丁二烯「Ａｒ－Ｎ＝Ｃ（Ｒ）－Ｃ（Ｒ）＝Ｎ－Ａｒ,Ｒ＝Ｈ,Ｍｅ;Ａｒ＝ＣｎＨ２ｎ＋１Ｏ－Ｃ６Ｈ４,２,４－（Ｃ４Ｈ９Ｏ）（Ｍｅ）－Ｃ６Ｈ３」化和物的合成,并通过热台偏光显微镜对其就介晶性进形了研究,化合物９（Ａｒ－Ｎ＝Ｃ（Ｒ）＝Ｎ－Ａｒ,Ｒ＝Ｈ,Ａｒ＝２,４－（Ｍｅ）（Ｃ４Ｈ９Ｏ）Ｃ６Ｈ３）的单晶结构显示,晶体成单斜晶系,Ｐ２１／Ｃ空间群。晶胞参数为ａ＝０．７０７０３（３）     

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