水库水质生物治理的系统生态学模型研究

<正>我校数学与信息科学学院郭红建博士获批2013年国家自然科学基金项目:水库水质生物治理的系统生态学模型研究,项目编号:11371306.水体富营养化一直是水库水环境污染的突出问题.治理水库水环境和维护水质,首先是控制水库污染发生系统中的污染源,其次是治理已被污染的水体,维持和提高水体的自净能力.控制水域周边的污染源需要靠行     

惠女水库水质现状及控制对策

根据泉州市环境监测站6年来对惠女水库的监测数据和对惠女水库污染源的调查结果，结合有关部门的统计数据，确定主要污染因子，分析惠女水库水质现状、变化趋势及主要污染源，提出了控制惠女水库水质污染的对策建议。     

厦门莲花水库水质现状及入库污染源调查

莲花水库是厦门市重要的新建水源工程项目,其水质安全关系到全市社会经济的持续稳定发展。该文对莲花水库库区水质现状,工业、农业、生活等污染源进行了调查分析,结果显示:目前莲花水库总氮、总磷为主要入库污染源,污染负荷来源主要为畜禽养殖污染和化肥污染。     

福清市东张水库饮用水源现状调查

通过对东张水库水质现状及污染源情况的调查分析，提出了东张水库水源保护工作的措施及污染治理建议.     

沈阳辉山水库流域环境污染现状调查及综合整治

对沈阳辉山水库流域工业、生活、农业及地面径流污染源进行了详细调查,监测和分析了水质和底泥质量,并有针对性地探讨了生态整治方案.结果显示：辉山水库流域主要污染源为生活源和农业源,每年入库污染量约为CODcr 400吨、总氮6 200吨、总磷700吨、污水120万吨、粪尿4700吨、固废200吨;水库流域水质类别为劣Ⅴ类,为重度污染,水库重度富营养化;底泥受到不同程度富营养化污染,并且辉山明渠起点采样点重金属总铅含量不合格;生态整治方案能改善辉山水库流域环境质量,实现生态流域和景观流域完美结合.     

山美水库水污染防治研究

本研究对山美水库入库污染源进行调查,采用等标污染负荷法进行污染源评价,在此基础上,提出了富营养化污染防治措施和排污总量削减实施计划.     

东圳水库流域氮磷面源污染现状调查与分析

面源污染已成为当前水环境的重要污染源。该文以莆田东圳水库流域为研究背景,通过对其2017年各类污染源进行统计调查,结合库区和入库河流水质监测,研究东圳水库流域氮磷面源污染的主要来源与负荷。结果表明,东圳水库流域的主要污染物为总氮和氨氮,主要污染源是农田径流,农业面源污染贡献了66.3%的总氮负荷。相应的,提出了东圳库区氮磷面源污染的控制措施。     

信阳市大型水库功能演变对水库水质的影响——以南湾水库为例

水库水质污染是水库利用过程中比较普遍发生的现象,水库利用过程体现为水库功能及其演变.研究水库功能及其演变与水库水质变化的关系,有助于科学、合理利用水库.信阳市是河南省内大型水库众多的地区之一,南湾水库是该市最大的水库,目前功能最多,在区域社会发展中作用重大,以该水库为例,运用相关分析法,探讨了该水库自1997年以来的水质波动状况与其功能演变之间的关系.结果发现:旅游经济、养殖业经济发展与水库总氮、总磷、石油类等水质指标之间存在比较显著的正相关关系,表明该水库发展旅游功能、养殖功能存在着环境制约性,对大型水库开发利用必须注意其生态环境承载能力;相关分析是一种将水库水质污染指标与水库污染源实现连接的简捷量化分析方法.     

桓仁水库面源污染现状原因分析及防治对策的探讨

桓仁水库是辽宁省最大水源大伙房水库的调储水源,水质现状值得关注。在对水库保护区内开展污染源调查的基础上,运用近年来的水质调查、监测、评价数据,分析水库面源污染现状及其水质变化原因,并提出相应的防治对策。     

论保障东圳水库供水安全的基本对策

本文通过对影响东圳水库水质的污染源类型和污染原因分析,以水库水体的可纳污能力为切入点,并结合库区生态果园改造和社会主义新农村建设,提出库区污染物削减方案和水环境综合整治的近、远期治理对策,具有较强的现实性和可操作性.     

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