古为今用、自主创新的典范——吴文俊院士的数学史研究

论述了吴文俊院士在数学史研究方面的成就与贡献,阐述其数学史研究思想对中国数学史研究的影响和意义.吴文俊院士的工作标志着中国数学史研究的一个新阶段的开始,为数学史研究提供了新思路和新方法,他所建立的"吴文俊数学与天文丝路基金"正在发挥着重要作用.吴文俊院士还把数学史研究成果应用于数学研究中,取得了一系列自主创新成果,是古为今用、自主创新的典范.     

国内外办公自动化的研究现状及发展趋势

本文对国内外办公自动化的现状和发展趋势进行论述分析,提出"数字化办公"和"协作办公"将是办公自动化系统的主要发展方向.     

基于VRML的虚拟现实研究及其应用

介绍了VRML和当前教学的现状,然后以开发"电脑DIY多媒体课件系统"为例,论述了基于VRML的虚拟现实技术在多媒体教学系统中的应用.     

IP城域网的网络安全以及具体的实施措施

城域网的网络安全是其系统组成当中的重要部分,而针对具体的安全防护措施进行分析和研究,是一项必不可少的工作.文章将针对这一方面的内容展开论述,详细的分析了IP城域网的网络安全以及具体的技术措施方案,力求为有关工作的进行,奠定坚实的基础,并且为网络安全性与可靠性的提高,做出积极的贡献.     

先秦儒家的"王权本位"思想

"王权本位"是中国传统思想的根本特征.儒家为王权本位思想的形成作出了巨大贡献.孔子为它奠定了重本主义、重位主义等主要的哲学思想;荀子贡献了王道政治学;孟子则贡献了"民本"的配套理论.     

利用噪声判断多元统计分析中独立变量数目

在多元统计分析中,确定统计元数目是一个重要问题,尤其在独立元分析中,更是一个根本问题.元数目就是系统独立变量数目,通过泰勒展开,系统可以用线性迭加高阶小的误差项描述,在白噪声达到一定强度时,非线性误差作为高阶小项可以忽略,系统表现线性特征.当按照0～4 dB信噪比向系统添加白噪声后,系统协方差矩阵的特征值分为两部分,即较小的、几乎相等的噪声贡献的特征值和噪声基础上叠加了独立变量贡献的较大的特征值.利用这一特点,可以将系统的独立变量区分开来,判断出"统计元"数目.通过算例对结论进行了验证,并探讨了影响结论的几个因素.     

论生产力标准——兼议江泽民同志"三个代表"重要思想的贡献

在以对话形式讨论"生产力标准"对"实践标准"的超越、生产力标准的结构的过程中,论述了江泽民同志"三个代表"重要思想的贡献。     

浙江连续5年"榜上有名"

近日,由科技部、中国科协、天津市政府共同举办的2020年中国创新方法大赛总决赛落下帷幕.浙江大华技术股份有限公司的"疫情就是命令,防控就是责任——创新方法助力精准体温高效筛查系统急速研发"项目获得一等奖,"智能速通门设计中的创新方法多重应用"项目获得三等奖.至此,在中国创新方法大赛总决赛获奖榜单上,浙江省取得了连续5年"榜上有名"的好成绩.     

“风云二号”辐冷器地检系统

介绍一种基于高精度数字电压表Keithley 2700的"风云二号"辐冷器地检系统.该系统可实现16路温度、状态高精度测量,11路遥控指令模拟,4路可变温控点的设定,并通过数据监视、自动保存和自动打印,使试验过程得到有效监控.该系统已成功用于"风云二号"辐冷器地面各项试验中,为"风云二号"辐冷器的在轨应用作出了贡献.     

国际法是一种弱法--汉斯·摩根索国际法思想述评

国际法学中"权力政治学派"(权力政治学说)最卓越的代表汉斯·摩根索对国际法做出了划时代的贡献.他结束了西方国际关系领域里的"国际法万能论"一统天下的局面,论证了国际法功能的分散化以及国际法作用的有限性,并且诠释了国际法和主权的诸种内在联系.然而,长期以来,其深刻的思想却为世人所误解,摩根索被看成是国际法虚无主义的典型人物.本文试通过论述摩根索的国际法观点并分析其成就与不足,以拓展我国国际法学界的研究领域.     

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