线性系统破损边界曲线理论的研究

本文主要研究了线性系统包装件在半正弦波、后锯齿峰波和矩形波激励下的冲击谱及破损边界曲线，进而提出了影响产品破损的主要因素；更能确切地描述产品的破损规律．     

车辆破损分析之检验方法简介及案例分析

破损分析是找出机械、材料等产品破损根原因之方法,需要运用许多的分析技术,例如非破坏性检测、化学分析、金相微观组织观察与分析、机械性能检测等相关检测技术。因此破损分析含括各类检测技术,并将其结果分析并结论,除获得产品破损根原因外,也可预防及改进其产品的各式强度或性质。破损分析技术所运用的领域相当广,耳熟能详有包含交通工具、建筑、化工、机械器具等,此篇文章针对车辆之破损分析进行探讨及案例研究,以供读者能有破损分析的概念及实务上的应用帮助。     

产品机械冲击脆值和耐振度研究

综述了破损边界理论及用Ｄｕｈａｍｅｌ积分得到的几种典型脉冲的冲击谱公式和破损边界曲线，提出了产品耐振度的概念．这些结果为产品的机械冲击和振动防护设计提供了理论基础．     

脉冲波和阶跃波输入的产品破损边界

以产品包装破损极限理论为基础，以有限上升阶跃波为例，对阶跃波和脉冲波作用下的产品破损边界曲线进行了求解，并对其进行了系统的分析和比较。     

产品跌落冲击耐撞性能稳健设计研究进展

跌落冲击是物体在短时间内受到强大冲击力而运动状态发生急剧变化的现象,是导致产品特别是小型机电产品外表破损、功能失效的主要原因。近年来,国内外研究学者针对如何提高产品抗跌落冲击的本质耐撞性能进行了大量研究。笔者从研究对象、研究方法等角度,系统总结了产品跌落冲击耐撞性和产品耐撞性能稳健设计的研究现状,归纳了有待进一步研究的问题。     

脉冲波和阶跃波输入的产品破损边界

以产品包装破损极限理论为基础，以有限上知阶跃波为例，对阶跃波和脉冲波作用下的产品破损边界英一进行了求解，并对其进行了系统的分析和比较。     

G353万盛境内段路面破损及养护分析

该文主要是对G353万盛境内段路面破损及养护进行了分析,首先概述了G353万盛境内段路面概况,并对路面破损进行了分;其次,对路面破损的原因进行了分析;最后,针对G353万盛境内段路面破损提出了养护的措施。     

铝电解槽内衬破损原因分析及对策

电解槽内衬破损是影响电解槽寿命的主要因素,分析了铝电解槽内衬破损的原因,提出了延长电解槽寿命的一些措施,对电解生产有一定的指导意义。     

运输包装件冲击管理模型

分析了包装件在流通环境中的冲击特性，建立了运输包装件冲击管理模型。运用该模型能够预先分析和评价包装件在装卸及运输过程中发生破损的程度及其产生原因，有利于改进包装方法和优化设计方案，减少和避免冲击负载在流通过程中对产品造成的破损。     

桥面破损的原因分析及修补方法

本文主要对目前高速公路桥面破损的原因进行分析。根据现有的施工技术,采用SK改性沥青上拌下贯式方法对桥面破损进行了探索,收到很好的效果。     

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