浅析计算机2000年问题测试

计算机２０００年问题是大多数计算机系统都存在的纪元信息问题，其实质是用２位数表示年份，从而导致到２０００年时计算机系统中有关年份的计算出现紊乱。此问题涉及面之广，影响面之大，在计算机领域是前所未有的。因此，解决计算机２０００年问题是当前计算机产业界的首要课题，总的来说，一般分为５个步骤进行，即摸底清查、影响分析、更新转换、测试和实现。其中，测试工作是解决计算机２０００年问题的关键步骤之一。经过测试     

中、小图书馆如何解决计算机系统2000年问题

随着２０００年的临近，多数中小图书馆计算机系统正面临着千年虫的困扰．本文以我院图书馆图书管理系统为例，就如何测试这些系统是否存在２０００年问题，以及如何解决这些２０００年问题，谈谈看法     

关于解决计算机2000年问题的问答（二）

１解决２０００年问题一般方法步骤？答：目前，国内外解决计算机２０００问题一般可以分为六个步骤，对于不同类型的系统，每个阶段的确切步骤有所不同，每个阶段的费用也会有很大的不同。第一步，认识、了解什么是２０００年问题；认识、了解２０００年问题的广泛性、...     

解决计算机2000年问题的技术问答

１．２０００年问题是什么问题２０００年问题，从狭义的范围讲，就是指在使用的计算机软、硬件以及数字化程序控制芯片的各种设备和业务处理系统中，由于只使用了两位十进制数来表示年份，因此，当日期从１９９９年１２月３１日进入２０００年１月１日后，系统将无法正常识别由“００”表示的２０００年这一具体年份，从而带来跟年份、日期有关的处理错误，引发各种各样的计算机业务处理系统和控制系统的功能紊乱。“２０００年问题”，又叫做“２０００年病毒”、“电脑千禧年问题”或“千年病毒ＭｉｌｌｅｎｎｉｕｍＢｕｇ”，国外还一般…     

关于计算机2000年问题的问答（一）

随着２０００年脚步的临近，解决俗称“千年虫”的计算机２０００年问题已日显紧迫。为了配合解决２０００年问题工作的开展，帮助广大读者了解２０００年问题的由来和危害，认识和掌握解决２０００年问题的方法和途径，本刊特开辟专栏，连续登载《关于计算机２０００年问题的问答》。读者有什么问题，也希望及时来函，我们将尽可能给予针对性的答复。     

我市召开第一次计算机2000年问题协调小组会议

为了进一步落实国务院和省市有关文件精神和全国第二次计算机２０００年问题电视电话会议精神，促进我市计算机２０００年问题的顺利解决,根据金胜山副市长的指示，我市于１９９９年２月１３日召开了第一次计算机２０００年问题协调小组会议,对工作进行了部署。⒈协调小组办公室前阶段的主要工作⑴积极开展计算机２０００年问题摸底调查,编制了相关的统计分析软件。调查表明计算机２０００年问题在我市普遍存在,占８３%。据我们初步了解,我市２０００年问题重点部门和单位对本部门、单位对２０００年问题总体上是比较重视,工作计划基本已经…     

关注计算机“闰年问题”

２０００年已经安全过渡，但“千年虫”还存在“闰年问题”一关，如何发现计算机总体中是否还存在这条“虫”呢？计算机专家说，只要您变更计算机时间设置就可以知道了。 据国家电子计算机质量检测中心罗洪元主任介绍，具体的做法是先将计算机日期设置为２０００年２月２８日，并将时间设为２３点５８分，然后关机。等待三分钟后重心开机，这时计算机的时间应为零点过一分至两分，日期应为２０００年２月２９日。再打开几个应用程序，看其是否正常运行。最后将计算机的日期和时间调回到当前设置。这一测试完毕后再将计算机日期设为２０００…     

dBASE系列管理信息系统2000年问题对策

通过对ｄＢＡＳＥ系列数据库管理系统产生２０００ 年问题原因的分析、了解,研究了采用日期重译法通过增加可识别４ 位年份的自定义函数,取代系统原有函数或修改程序文件中与日期有关的语句,以解决用ｄＢＡＳＥ系列数据库管理系统开发的管理信息系统中存在的２０００ 年问题的方案     

市政府组织计算机2000年问题专项检查

３月３日上午,副市长、市计算机２０００年问题协调小组组长金胜山,率市科委、计委、人民银行杭州中心支行、市信息办、市协调办等有关部门领导负责人,对市电信、电力、商业银行、汽轮动力集团四个单位进行计算机２０００年问题专项检查。金胜山副市长强调:解决计算机２０００年问题是一项事关我市全局性的问题,此项工作现在已经进入攻坚阶段,时间非常紧迫,离国务院、省、市政府最迟在１９９９年３月底前完成修改已不到１个月了,在９月底前完成修改后的调试和测试工作也只有６个多月。因此,各级各部门必须以对国家和人民高度负责的态度,按照…     

电脑千年虫问题的解决方法分析与实践

千年虫问题是电脑系统以２位存储年份而产生的在２０００年后不能正确识别年份的问题,解决千年虫问题的根本就是解决年份的存储和识别问题,本文综合分析了目前常用的解决千年虫问题的几种方法,及其特点、复杂性及成本,最后介绍了我们在实际解决应用系统千年虫问题上的实践。     

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