缓减中国贫水化的基本对策

根据全世界水资源短缺造成的严重后果，分析了目前中国贫水化的严重性，并根据水资源浪费的实际特点，提出了缓减盆水化的对策。     

关中地区的贫水化探讨

关中地区水资源贫乏，供需矛盾尖锐，存在严重贫水化问题，这阻碍着陕西经济的进一步发展．本文主要论述了这一地区贫水化的表现，提出解决贫水化问题的措施和对策     

聊城地区西部贫水区农业供水对策的系统分析

根据聊城地区西部贫水区水资源状况，提出了该区应以节水型衣业为主，辅之以补源措施，以满足农业发展的需要．     

各国的节水高招

随着各国经济的不断发展，全球水资源问题日益突出。联合国水资源会议曾郑重向全世界发出警告：“水，将成为石油危机之后的下一个社会危机。”我国人均水资源拥有量不到世界人均水平的1／4，被列为世界13个主要贫水国家之一，水资源短缺已成为制约我国经济和社会发展的重要因素。那么，其他国家节水有何高招值得我们学习呢？     

“八五”国家科技攻关子课题──“生物预处理去除微污染技术”通过鉴定

“八五”国家科技攻关子课题──“生物预处理去除微污染技术”通过鉴定水是生命之源．我国水资源人均占有量只及世界水资源人均占有量的１／４，属贫水国．水资源贫缺，而水源的污染又日益严重．据国家环境监测部门的一项调查表明，经对全国５３２条河流监测，其中８２％...     

王佐镇：探索建立节约型宜居小城镇

王佐镇地处北京西南郊，东临永定河，位于丰台区与房山区的交界，总面积61．33平方公里，总人口38000人，辖8个中心村，36个自然村。2000年10月被北京市政府批准为小城镇。由于王佐镇地处京西贫水地区，水资源严重短缺，随着王佐小城镇建设，水资源对经济和社会发展的矛盾尤为突出。     

哈尔滨市污水再生利用的建议思考

水是一种极为重要的宝贵资源，是地球上生命繁衍和人们生产生活不能缺少和无可替代的重要物质，也是制约经济和社会发展的重要因素之一。人们日常生活的每一天都离不开水，而农业生产和企业生产的正常运行也离不开水，水是城市社会经济可持续发展的重要资源保证，对城市社会经济的发展起着重要的作用。我国是世界上13个贫水国家之一，水资源总量约为2，8万亿m^3，人均水资源拥有量2300m^3，为全球人均拥水量的四分之一，黑龙江省水资源总量为772．2亿m^3，人均水资源拥有量2030m^3，低于全国平均水平，根据水利部统计，     

大力促进厦门市的中水回用

水是人类生存的生命线，也是工业、农业和整个经济建设的生命线。水资源的短缺是影响中国经济发展的最大障碍之一。城市的污水再生回用符合我国贫水的客观事实，具有现实和深远的意义。     

内蒙古奈曼旗水资源现状分析及其利用

通辽市奈曼地处科尔沁沙地腹地,属贫水区,近年来,水资源危机已经发生,干旱、水土流失、土地沙化、生态环境恶化严重.缺水和自然降水利用不足严重制约着奈曼的经济发展、社会进步和人民生活.本文从五个方面论证了该地区水资源利用的基础、途径及其自然降水资源存留保护的迫切性、可行性和效能效益问题.     

工业节约用水的方向和途径

水是生命和生产的基本要素,我国、我省是贫水地区,水资源短缺严重影响了人民生活和国民经济的发展。通过对冶金、纺织、造纸、食品、水泥、电镀和电力等行业的调研,提出了节水方向和途径。     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the