白银市区域生态环境质量评价研究

根据白银市区域生态环境系统的实际情况,确定其生态环境质量评价指标体系,并通过对各评价因子进行权重计算和分级量化,利用综合评价模型对白银市区域生态环境质量进行评价,为白银市合理进行区域生态环境综合整治和协调区域发展与环境保护关系提供科学依据.     

长江经济带区域生态环境质量综合评价与预测研究

十九大报告明确指出,要继续"以共抓大保护、不搞大开发为导向推动长江经济带发展".为此,论文依据生态环境压力-状态-响应模型(PSR),构建了生态环境质量综合评价指标体系;并利用变异系数法和GM(1,1)模型,对长江经济带11省市生态环境质量进行综合评价与预测.研究结果表明:在时间维度上,2010-2016年长江经济带区域生态环境质量及其分维度生态环境状态、响应总体上呈现良性向好态势,但生态环境压力越来越大.在空间维度上,2010-2016年长江经济带生态环境压力、状态和生态环境质量呈现"中西部区域高于东部区域"的梯度空间特征,而生态环境响应呈现"东部区域高于中西部区域"的梯度空间特征.研究结论对于生态环境可持续发展具有重要的理论与实践指导意义.     

基于GIS技术与AHP研究生态环境敏感度分区

区域生态环境敏感性综合评价涉及众多要素,同时又需要反映生态环境质量状况的空间格局.层次分析法在多要素综合评价方面具有独特优势,而GIS技术拥有强大的空间分析能力,将G1S与层次分析法相结合应用于重庆市丰都县生态环境质量综合评价,可以充分发挥两种方法的优势,本文全面对区域生态环境的空间分异规律进行分析和研究.在此基础上提出对丰都县持续发展的对策和建议.     

恩施州农业土壤质量评价研究

通过对在土壤质量评价中关于确定评价因素鉴定指标、单因素评价以及综合评价等关键性问题的综合分析,依据土壤质量评价中存在模糊性特点,利用模糊数学建立土壤质量单因素评价和综合评价模型的思想与方法,对恩施州12种农业土壤质量进行综合评价,结果表明模糊数学方法在土壤质量综合评价中是一种较为理想的方法,评价结果基本符合土壤实际.     

基于栅格和层析分析法的生态环境质量评价研究——以平凉市为例

区域生态环境质量评价是协调区域经济发展与生态环境保护之间关系的基础,以平凉市2015年生态环境质量评价数据为基础,构建适合平凉市的生态环境质量评价体系,并运用层次分析法确定权重值,并采用栅格化思维将整个平凉市生态环境质量评价进行网格化处理,计算得到平凉市生态环境质量综合分值最高为59.27,最低为40.5,整体空间分布格局呈现中高两侧低的分布格局。     

基于RS与GIS的北京区域生态环境综合评价研究

采用切实可行的指标体系综合评价北京市生态环境状况,对北京市生态环境保护具有很强的参考和指导意义.结合已有的研究成果.运用Rs与GIS技术.参考2003年中国环境监测总站颁布的<生态环境质量评价方法>,以北京市各区县为评价单元,对北京市生态环境进行综合评价.结果表明,北京市各区县生态环境综合总体状况为良,其中远郊区县生态环境状况较好,生态环境状况优于城区,评价结果符合实际情况.     

河南省区域城市化与生态环境效应空间关系分析

运用熵权法对2012年河南省18个地市的城市化水平和生态环境效应进行综合评价,并在此基础上运用空间统计分析和GIS技术,探讨河南省区域城市化与生态环境效应的空间关系.结果表明:2012年河南省区域城市化水平与生态环境效应空间差异显著,且呈现较明显的负相关对应关系;通过空间自相关与空间关联分析,区域城市化与生态环境效应呈现全局性显著的相似区域间"趋同"的集聚特征;运用K-Means聚类分析将2012年河南省区域城市化与生态环境响应关系划分为5种类型.     

基于遥感的连片特困区生态环境质量动态监测——以燕山—太行山片区为例

"燕山—太行山"连片特困区生态环境质量动态监测是制定该地区新时期扶贫开发政策需要考虑的问题,对引导区域资源合理开发和社会经济可持续发展具有重要现实意义.本文根据特困区的特点以及评价目的构建了由生物丰度指数、植被覆盖指数、水网密度指数和土地退化指数组成的具有RS特色的评价指标体系,以栅格和县级行政区划为评价单元,借助GIS空间分析技术,对研究区2000年和2010年的生态环境进行了评价分析.结果显示:研究区近10年生态环境局部存在恶化现象,但总体上得到了改善;2010年生态环境质量良好的县域面积占到整个研究区面积的41.27%.该研究结合遥感技术探索了连片特困区生态环境质量评价的方法,具有较好的操作性;该指标体系和评价方法可以推广到其他区域的生态环境质量评价中,可以为连片特困区的生态建设提供技术支持.     

贵州省生态环境质量评价及生态环境质量区划

采用生态因子质量等级评分加权综合质量指数法对贵州86个县级行政区划单位的生态环境质量进行评价,并按综合质量指数的高低将生态环境质量划分为优、良、中、差4个等级,得到各个县域生态环境质量评价结果.根据该结果,按照地理区划的基本原则和方法,对贵州生态环境质量进行分区,将全省划分为3个生态环境质量区,并就各区的生态环境质量现状和建设保护的对策措施作了简要说明.     

基于GIS技术的环泉州湾地区 生态环境综合评价

生态环境问题是影响人类生存和社会经济发展的基本问题.近年来,随着全球气候变暖、空气污染严重、水土流失加剧等一系列环境问题的出现,人们逐渐认识到良好的生态环境是人类能够得以生存发展的必要条件之一.根据环泉州湾地区生态环境特点,利用GIS和RS技术,对评价数据进行处理,采用综合指数模型对该区域的生态环境进行综合评价.研究表明：环泉州湾地区总体生态环境状况良好,在作五级划分的各等级中,第Ⅲ等级以上面积占86.81%,其中第Ⅱ等级的比例最高,主导着整个区域生态环境现状的水平,但仍有部分地区生态环境状况较差,需要引起人们重视.同时表明,基于GIS和RS技术的生态环境综合评价的方法和理论具有很强的探索性和开拓性：利用该技术对区域生态环境进行综合评价,具有获取数据方便、快速的特点;栅格叠加功能,使评价结果更准确;空间表达功能使评价结果显示更直观,更容易被接受.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-