新型环境经济协调预测模型及应用

以持续发展理论为核心，借助系统工程多目标优化的思想，利用协同论的观点构筑了一种新型的环境经济协调度预测模型。本模型包括两个部分，即协调度计算模型和协调度变化预测模型。协调度计算模型由功效函数，协调度和函数和环境经济协调度指标体系构成，其中指标体系的选取是协调度计算正确与否的关键。     

城市化与生态环境的耦合度模型及其应用

在城市与生态环境耦合规律的基础上,利用协同论的观点构筑了它们之间交互作用的耦合度模型。模型包括两部分即耦合度计算模型和耦合度预测模型。耦合度计算模型由功效函数、耦合度函数和城市化-生态环境耦合评价指标体系构成其中指标体系的选择是耦合度计算正确与否的关键。耦合度预测模型采用人工神经BP反馈网络。最后,以徐州市为研究对象应用此模型研究了该城市化与生态环境耦合的现状和发展趋势,为协调好它的城市化与环境建设提供了量化的决策依据。     

山东省能源经济环境系统协调发展评价研究

山东省能源经济环境系统协调发展评价有助于山东省把握能源经济环境系统发展的规律,寻求存在的不足及原因,为山东省科学持续发展提供决策依据.构建了包含三个目标、11个准则和22个具体指标的山东省能源经济环境系统协调发展评价指标体系.基于主成分TOPSIS价值函数和离差函数,构建了子系统发展度、子系统两两协调度、子系统两两协调发展度以及系统总体协调度等能源经济环境系统协调发展评价模型.运用其对山东省1995—2010年的能源经济环境系统协调发展进行评价,进而提出了促进山东省能源经济环境系统协调发展的相关对策.     

1998～2008年辽宁省环境与经济发展协调度分析

在阐述环境经济协调度概念的基础上,针对辽宁省的具体情况,构建了环境系统与经济系统发展指标体系,运用系统论理论,建立了环境与经济协调度模型,计算出环境系统、经济系统以及环境经济复合系统的协调度,并进行了评价。发现辽宁经济与环境系统之间不协调,经济发展是以牺牲环境为代价的,环境也会进一步制约经济的发展,需要进一步加大环保力度,发展循环经济、实施清洁生产。     

1998～2008年辽宁省环境与经济发展协调度分析

在阐述环境经济协调度概念的基础上,针对辽宁省的具体情况,构建了环境系统与经济系统发展指标体系,运用系统论理论,建立了环境与经济协调度模型,计算出环境系统、经济系统以及环境经济复合系统的协调度,并进行了评价.发现辽宁经济与环境系统之间不协调,经济发展是以牺牲环境为代价的,环境也会进一步制约经济的发展,需要进一步加大环保力度,发展循环经济、实施清洁生产.     

皖江城市带环境经济系统协调演化分析

可持续发展观要求环境与经济协调发展,以发挥最大的综合效益.本文以皖江城市带为研究区域,构建了皖江城市带环境经济系统评价指标体系,分析了研究区的环境综合实力指数与经济综合实力指数;运用协调度与协调发展度模型,对皖江城市带2004-2011年环境经济系统的协调性及其演化特征进行定量评价.结果显示,协调度的平均值为0.7848,环境系统与经济系统总体上表现出一般协调水平,呈现"下降-上升-下降"的趋势,且各年间变化幅度大;协调发展度呈现先上升后下降的趋势,变化范围为0.6432到0.7614,大致处于初级协调发展经济滞后型阶段和中级协调发展环境滞后型阶段.     

甘肃省经济与环境耦合协调时空演化格局分析

通过建立经济环境综合评价指标体系,运用耦合协调度模型,对甘肃省14个市(州)的经济环境耦合度和协调度计算后进行时空格局演化分析.结果表明:从空间看,甘肃省经济环境耦合度的空间分布呈现梯次化、组团化特征,东部和南部地区的耦合度高于北部和西部;甘肃省的经济环境协调度整体处于低协调阶段,10 a间基本没有变化.从时间序列看,甘肃省大部分市(州)的经济环境耦合度出现了缓慢波动下降的趋势,市(州)之间的差距在缩小;经济环境协调度绝大部分处于缓慢上升的阶段.根据耦合度和协调度,可以将甘肃省14个市(州)划分为经济环境高耦合低协调地区、经济环境拮抗区以及经济环境低耦合低协调地区3个类型区.     

大连市环境-经济系统的协调发展研究

在环境-经济系统分析的基础上，结合大连市自身的特点，建立了大连市环境-经济系统协调发展评价指标体系，采用综合指数法对其协调度和综合发展水平进行了计算。结果表明大连市环境与经济的发展关系相对趋于协调，但2002年后大连市的环境经济协调发展模式已从经济增长滞后型转变成环境发展滞后型。     

黄河三角洲中心城市生态环境与经济发展协调度研究——以东营市为例

东营市地处黄河入海口,是黄河三角洲地区最为重要的中心城市.该区生态环境脆弱,在保持经济发展的同时,必须协调环境与经济之间的关系.利用主成分分析方法以及协调度评价指标体系和计算模型,对东营市2004—2010年经济资源环境协调度进行了评价研究.东营市环境与经济发展的协调程度总体来看属于协调发展类型,但其经济社会水平明显高于其资源环境水平,经济与环境协调度并非稳定发展,具有一定的波动性.其原因主要有黄河三角洲高效生态经济区的政策取向以及黄河三角洲地区生态环境严重恶化.最后提出了加大城市生态环境保护力度、大力发展循环经济等东营市生态环境与经济协调发展对策建议.     

长江经济带人口、经济与环境耦合协调度评价

构建人口-经济-环境系统综合评价指标体系,基于熵值法和耦合协调度模型对2006～2016年长江经济带116个地区进行人口、经济与环境耦合协调度评价.研究结果表明,长江经济带116个地区的人口、经济与环境耦合协调度整体水平不高、梯度差异显著、两极分化明显,耦合协调度较高的地区普遍分布于东、中部地区,耦合协调度较低的地区普遍分布于中、西部地区,整个经济带各地区的主要协调类型为濒临失衡和轻度失衡,主要制约因素为经济因素和环境因素.     

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.     

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     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has