环境试验与加速环境试验技术

本文通过对环境试验和加速环境试验两种试验技术的对比,介绍了加速环境试验技术的定义、分类及实现过程,并针对加速寿命试验和可幸性强化试验两种试验技术的基本原理和试验过程进行了重点阐述。     

论载荷试验在测桩中的应用

介绍了载荷试验的必要性,结合实际工程实例,对整个载荷试验过程进行了分析,并指出了在试验过程中应注意的事项。     

浅谈GIS设备的现场交流耐压试验

介绍了GIS设备交流耐压试验的重要性,总结了试验程序和试验过程中应注意的问题,特别是结合实际对试验过程中出现的放电原因作出分析并提出处理办法。     

民用飞机验证试验过程中的构型管理研究

本文对民用飞机验证试验过程中产生的构型数据进行分析,阐述了构型管理在民用飞机验证试验过程中的必要性,描述了试验过程构型管理的内容以及如何通过构型管理对构型数据进行有效的控制。     

如何对电力设备进行工频交流耐压试验

工频交流耐压试验是鉴定电力设备绝缘强度最有效和最直接的方法,是预防性试验的一项重要内容。文章介绍了工频交流耐压试验原理接线、试验电压的测量方法和试验前和试验过程中的注意事项等,并对试验过程中所可能发生的情况及试验结果进行了具体的分析。     

靶场试验的危险有害因素分析

随着国防事业的发展,各类高新武器装备的研发速度大大提高,随之高能高危险性靶场试验的风险也越来越大,迫切需要加大各种燃烧爆炸品靶场试验过程中的风险管理.该文围绕靶场试验过程中的各种危险有害因素,论述了靶场试验的风险实质,分析了火炸药的危险特点,着重讨论了靶场试验过程中危险物质与危险能量的内涵.这对提高我国靶场试验的风险管理水平具有重要的参考价值.     

地基承载力的试验分析

地基原位静载试验是确定地基承载力的最精确的方法,但是在实际工程测量过程中,无法进行在原位进行破坏荷载试验,因此以某现场地基原位荷载试验为基础,通过数值模拟对比分析了现场实测数据,从而为现场原位试验进行了补充,弥补了原位试验过程中加载受限的不足。     

基于刀具可靠性的切削过程优化研究

在对刀具进行可靠性筛选试验的基础上，对切削过程优化进行理论研究，建立了切削过程优化分析新模型，并利用该模型进行实例计算与试验，验证了理论分析结论，表明：刀具经可靠性筛选试验后，产品成本降低，切削过程的稳定性增强。     

测定土塑限的试验方法比较

介绍了土工试验指标的确定以及液塑限联合测定法和滚搓法的试验过程,并对实验过程中发现的一些问题进行了分析和探讨。     

民机试验的全过程质量控制

现代民机的研制过程中,必须通过大量的试验和试飞来验证对设计目标的满足和对适航条款的符合性,如何通过有效的试验过程质量控制,来确保试验结果的有效性,成为了民机研制试验质量管理的一个重点。     

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