毕节试验区的建立是可持续发展的探索——贫困地区PRED协调的路径

区域可持续发展是谋求区域内人口、资源、环境与经济社会各要素之间协调关系的发展,但西部贫困地区所存在的贫困—人口—环境恶性循环却导致了其落后的经济、社会发展现状,并制约着它们的可持续发展进程。毕节试验区的建立,对PPE怪圈进行良性化的定向干预试验,其实质是解决PRED问题,这种"开发扶贫、生态建设、人口控制"为主题的人口、环境、经济社会协调发展合理途径的探索性试验,是贫困地区可持续发展的探索。     

后危机时代海南省城镇化发展的空间分异研究

在后危机时代，明确海南省城镇化发展现状和趋势，对海南省因地制宜的选择城镇化和经济发展战略具有重要意义. 基于熵值法，从人口、社会、经济和地域景观等4个维度构建城镇化水平综合评价指标体系，对海南省2011—2013年18个市县的城镇化水平进行综合评价，并借助ARCGIS软件和空间自相关分析、抽样标准差的方法，对后危机时代海南省城镇化发展的空间分异进行探索，结果表明:（1）海南城镇化综合水平在逐年小幅度提升，但区域差异较大，形成明显“两极格局”和东、中、西线城市的城镇化水平递减格局；（2）空间自相关分析表明，海南省城镇化水平在空间分布上并没有表现出集聚的特征，不存在城镇化发展的核心带动区，且局部区域存在显著负相关关系；（3）城镇化类型区域差异明显，严重滞后、滞后、超前、严重超前型城市并存，积极型城镇化城市不多，且城镇化“双中心”城市城镇化均超前较严重，而积极型城市的城镇化和经济发展在省内均处于低水平.     

鄱阳湖生态经济区城市用地扩张与城市人口增长时空协调性研究

基于鄱阳湖生态经济区县域城市建成区和城市人口数据,引入Getis-Ord Gi*指数,构建用地扩张-人口增长协调性系数C_I,对经济区31个县域进行时空协调性综合分析.结果表明:2001—2012年鄱阳湖生态经济区土地城镇化水平及人口城镇化水平表现出同步增长趋势,2者呈显著正相关; 县域间土地城镇化进程空间差异较大,表现出南快北慢的总体趋势,人口城镇化进程差异相对较小; 城市用地扩张与人口增长G值均呈高值集聚、低值分散的特征,南昌市为高值中心; 人口城镇化与土地城镇化整体协调,但县域间协调性系数存在显著的非均衡性和空间差异性,C_I值呈“特大城市>大城市>中等城市>小城市”的态势,昌九、浙赣线所组成的“┸”字型地带周围县域C_I值较高,滨湖区及边缘区县域则较低.     

基于AHP法的宜宾市县域城镇化发展水平综合评价

以宜宾市区县为研究对象,从经济城镇化、人口城镇化、社会城镇化和空间城镇化4个方面构建县域城镇化水平的综合评价体系,利用层次分析法分析宜宾市10个区县的综合城镇化水平,并结合灰色关联度分析法和系统聚类法探讨县域城镇化发展的动力因子和区域差异特征。结果表明:经济城镇化和人口城镇化在县域综合城镇化水平评价体系中占有较大权重;县域城镇化水平空间差异显著,可分为县域城镇化水平较高地区、县域城镇化水平欠发展地区和县域城镇化水平落后地区3种类型。文章还对各类县域城镇化特征和成因进行了探讨。     

福建省县域城镇化发展水平空间自相关分析

从空间、人口、经济、社会生活四方面选取17项指标构建了评价福建省县域城镇化发展水平的指标体系.通过主成分分析方法得出各县域城镇化水平的综合得分.以综合得分为变量对福建省县域城镇化水平进行空间自相关分析.结果显示:福建省县域城镇化发展水平存在较强的空间相关性。即城镇化水平高的县域之间相邻,城镇化水平低的县域在空间上也相邻:同时福建省区域中心城市对其周边县域城镇化的推动作用不强.     

促进资本形成的理论分析

资本形成是发展中国家经济增长的重要制约因素,由于资本形成不足,发展中国家出现了贫困恶性循环和低水平均衡陷阱。如何摆脱这种不利的状况呢？采取什么方式促进资本形成呢？初期的发展经济学家提出了下述的看法。     

拉萨市旅游资源优势度与经济发展水平演变的耦合研究

通过加权山地交通可达性，优化了拉萨市旅游资源优势度模型，将2009、2014、2019年旅游资源优势度数据分别与当年的区域经济发展水平演变情况进行了耦合分析，以探索旅游发展的空间格局优化方式。结果表明：山地交通可达性影响着游客的旅游目的地的选择，交通节点和干线周边的乡镇旅游优势度明显提升；2009~2019年拉萨市旅游资源优势度变化幅度较小，但县域经济发展差距拉大，形成“强周边弱核心式”经济发展格局;2009~2019年拉萨市旅游资源优势度与经济发展水平呈负向相关，旅游资源优势乡镇过度依赖外部经济，本地产业发展受到制约陷入“资源诅咒”，旅游资源弱势城镇在离开投资驱动后沦为人口、资源流出区，形成“贫困陷阱”。     

河南省城镇化发展现状、问题与对策

河南省是人口大省和农业大省,在城镇化的过程中取得了显著成果——城镇化进程稳步增长、城镇化质量明显提高、中心城市带动战略效果显著和城镇规划更加科学,然而同时在发展的过程中也存在着粗放型发展、区域发展不协调、城市和农村“二元”现象严重、人口主要集中在大城市中心城区和城镇化资金供需矛盾突出的问题．在问题分析的基础上给出了相应的政策建议．     

黄土高原县域城镇化的地域分异与动因机制

以黄土高原341个县级行政单元为研究区,综合运用统计分析、分区分析和地理探测器等研究方法,从区域和分区两个层面分析1990—2015年黄土高原县域城镇化的地域分异特征,揭示黄土高原县域城镇化空间格局形成的动因机制。结果表明:(1)1990—2015年,黄土高原县域城镇化水平呈现稳步上升趋势,城镇化率由23.83%上升至54.33%,在地理空间上呈现出东中部高而西部低的宏观格局。省会城市和地级市等高城镇化县区的中心性明显,以鄂尔多斯高原为中心的高城镇化区形成并逐渐加强。(2)1990年以来,黄土高原县域人口空间集聚和社会经济发展的地域差异呈现减小趋势,县域城镇化均衡发展态势明显。在地理分区上,除高原风沙区县域经济发展地域差异显著扩大外,其余各分区县域人口集聚和经济发展的地区差异趋于缩小。(3)县域经济发展阶段、非农产业产值比重、人均社会消费品零售总额、人均粮食产量、人口密度、到中心城市的最短行车时间、城镇居民人均可支配收入等是区域城镇化地域分异格局形成与演化的基本驱动因素。(4)未来黄土高原地区城镇化应依据自然地理和社会经济要素的地域差异性科学定位、分类推进,通过地域功能优化、产业结构转型升级、人口迁移集聚、基础设施共建共享和生态补偿政策等的实施,协调好城镇化建设、农业生产和生态环境保护三者之间的关系,实现新时代黄土高原县域城镇化率的稳步提升和城乡建设的高质量发展。     

产业结构调整是西部大开发的突破口

本文认为，结构变动是经济增长的重要动力，是西部大开发的突破口。只有以产业结构调整为核心，积极培育主导产业，增强中小企业活力，大力加快城市化进程，我国西部才能走出低水平均衡陷阱，促进区域经济的良性协调发展。     

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