21世纪城市绿地系统规划的认识与思考

针对目前城市绿地系统规划中存在的主要问题,提出城市绿地系统规划必须建立与城市总体规划相协调的关系和对应的编制体系,树立城市大园林的思想,科学制定城市绿地规划指标,重视“氧源绿地”和“城市通风走廊”的建设并指出城市绿地系统的发展趋势。     

创新城市绿地系统规划思路的探讨

目前城市绿地系统规划存在特色不够突出,实施性、可操作性较差的普遍问题.文章以铜陵市绿地系统规划为例,从宏观和微观两个层次探讨如何挖掘和提升城市的特色,如何提出科学合理的城市绿地系统规划方案、如何制定易于操作的绿地建设指标,并对滨水绿地规划建设方法进行了探讨.     

岳阳市生态园林城市建设

以生态学理论为基本原则,根据国家园林城市建设标准,提出了岳阳市生态园林城市建设和城市绿地规划的建议。岳阳市生态园林城市绿化建设的目标是：到2005年规划建设绿化覆盖率达到36％,绿地率达到32％。人均公共绿地面积9m^2;到2015年规划建设绿化覆盖率达到40％,绿地率达到35％,人均公共绿地面积13m^2。规划中注重城市生态体系的建立。注重保持生态平衡、保护生物多样性,通过城市绿化和生态园林的建设,达到人与社会、环境的和谐。     

城市绿地系统规划—以辽宁省朝阳市为例

为保证有序的城市建设和环境生态的可持续发展,编制城市绿地系统是非常必要的.城市绿地系统内容包括编制、深化、落实绿地的指标、要求、内容.充分利用人文资源和自然生态环境资源,形成城乡统筹、协调发展的绿色体系.城市绿地系统规划为政府启动建设、公共投入、开发控制提供工作框架,指导近期发展建设的可操作性,控制落实长远规划.     

城市绿地系统规划的特色塑造探讨

每个城市有它自身的地域特征和地方历史文化特色,一座城市的绿地系统在一定意义上反映了城市的特色.精神和物质是城市绿地系统规划的两个特色要素.在城市绿地系统规划中,必须从城市自然景观、本土人文环境和人工环境三方面综合着手来塑造城市特色     

南阳油田资源型城市绿地系统规划初探

城市绿地系统对美化城市、改善城市生态环境质量起着极大的作用,是城市生态环境的重要组成部分。本论文以南阳油田为例,探析油田资源型城市绿地系统特点、建设现状及存在的问题,结合油田实际,提出油田资源型城市绿地系统规划策略,并为同类型城市绿地系统规划提供参考。     

我国城市绿地系统的规划与建设

城市绿地系统作为城市自然系统的主体,发挥着重要的生态功能.我国城市绿地建设普遍滞后,现在的城市绿地系统规划还存在不少问题,本文在分析绿地功能的基础上指出了在我国城市绿地系统规划与建设中所存在的几个主要问题,粗略地点明了解决这些问题的几点对策,尝试构建了使我国城市绿地系统规划顺利进行的内外条件.     

固原市城市绿地系统规划

《固原市城市绿地系统规划》是《固原市城市总体规划》的重要专项规划,是城市绿地建设、管理的基本依据,是改善城市生态和人居环境的指导性文件。     

郑州市生态绿地系统发展的思路及对策

本文从宏观区域角度出发,将绿化纳入城市自然经济社会复合系统,以生态学原理和花园城市理论为基本指导思想,讨论了城市绿地系统规划的基本原则,并以郑州市为例,从确定绿地规划指标,合理布局绿地系统及重点建设工程三方面提出了绿化发展的思路与对策．     

城市行道树规划建设初探

城市行道树是城市道路绿化的骨架,以“线”的形式联系着城市绿地的“点”和“面”,构成完整的城市绿地系统,是整个城市形象最直观的反映。目前许多城市的行道树存在品种单一,观赏价值低。本文通过嘉兴市南湖区行道树建设的历程,分析指出行道树规划要坚持的原则,建设要重视的问题,同时建议推广道路植物与景观的多样性。     

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