基于成本收益视角下的城市空间拓展规律研究——以黄河流域黄土丘陵沟壑区城市延安市为例

随着中国社会经济的快速发展,城市空间的拓展也在加速,因此对城市空间拓展特征和规律进行研究非常必要.以延安为例,对延安城市空间格局的演变和扩展规模的变化进行分析,并以2000-2017年城市主要发展指标为基础数据,从自然、环境、经济、社会4个方面分别进行了城市拓展的成本-收益分析,经过权重叠加,得出延安城市拓展的综合成本...     

少数民族传统聚落微气候适应性的研究策略探讨

文化基因是研究少数民族传统聚落的根和精髓,也是少数民族传统空间微气候研究区分其他聚落的关键.本文分析了中国少数民族传统聚落空间形态特征、历史变革等的文化属性,阐述了中国少数民族传统聚落微气候舒适性的研究方法、研究策略和未来研究方向.以微气候视角为切入点,挖掘中国少数民族传统聚落的生态智慧,为中华民族传统聚落的保护和发展提供策略支撑.     

北京市流动人口空间分布特征及变化趋势研究

北京市流动人口增长势头仍在继续,已成为北京城市建设中不容忽视的问题.本文对北京市户籍人口、流动人口的总量特征进行对比分析,对北京市各区县的流动人口数量、密度进行分析,还以首都功能核心区、首都功能拓展区、重点新城、其他新城为研究范围对流动人口情况进行了分析,得知首都功能核心区的流动人口已处于稳定状态,增长最快的是拓展区和新城地区.使用探索性空间数据分析（ESDA）方法——空间自相关来分析2005年至2009年北京各区县流动人口的空间分布变化特征,得出北京市流动人口分布有很强的集聚性并呈逐渐分散趋势的结论.最后针对目前北京流动人口的发展形势提出相应的对策建议.     

亳州市城市空间格局特征及优化模式研究

文章回顾了毫州市城市空间格局的发展历程,分析了其现状特征和城市空间拓展方向,总结了城市空间格局的发展模式,并对未来城市空间格局的优化模式进行了探讨.     

南阳市建成区空间拓展及动力机制分析

南阳市建成区面积从1949年至2012年经历了快速增长,呈现出单中心同心圆式扩展特征.本文通过对其发展历程的梳理,借助建设用地拓展速率和拓展弹性系数公式分时段进行测度,分析空间拓展与人口增长的协调性;选择人口数量和地区生产总值作为自变量,建成区面积作为因变量进行回归分析,探讨城市空间拓展的动力机制.     

学习型政党建设的研究述评

对学习型政党建设提出的背景和现实意义进行了较为全面和深入的阐述,在对学习型政党的基本内涵、主要特征、历史定位、建设基础等研究的基础上,提出了一些实施策略。从目前的研究情况看,在内涵与特征、问题和策略、继承与借鉴问题上,还有非常广阔的理论拓展和研究空间。     

海南拓展国际旅游市场的营销策略探析

国际旅游岛的建设,为海南旅游业和服务业提供了极大的发展空间.文章在此基础上分析了海南国际旅游市场营销中存在的问题,从政府角色定位和营销战略措施等方面探讨了海南拓展国际旅游市场的营销策略.     

方阵的模糊特征向量

寻求实矩阵的实特征值在模糊向量空间中对应的特征向量.采用嵌入法研究了实矩阵的模糊特征向量的取值问题、模糊特征子空间的封闭结构、不同模糊特征子空间的关系以及模糊特征子空间与实特征子空间的关系.作为模糊特征向量的一个应用给出了模糊线性系统解存在的充分条件.上述结果将实矩阵的特征向量取值范围拓展到模糊向量空间.     

流形拓展t-过程回归（英文）

本文提出了一种流形拓展t-过程回归模型,用来分析带有复杂协变量的函数型数据.该流形拓展t-过程回归模型可将协变量数据变换至特征空间,然后用拓展t-过程回归将特征空间数据转换到观测数据空间,从而对观测数据进行建模.我们建立了一个估计程序来估计模型中的参数.对真实数据和模拟数据进行了分析,结果说明所提流形拓展t-过程回归模型是可行的.     

大连市游憩地空间拓展规律与特征分析

近年来,随着近距离旅游需求的日益增强,环城游憩带这一新的旅游空间模式应运而生,而环城游憩带中游憩地的空间拓展也逐渐成为旅游研究的重点课题之一.以北方滨海城市———大连市为研究对象,选取205处游憩地作为研究样本,运用MapInfo制图软件工具分析并建立旅游地综合性评估模型,从游憩地空间拓展、类型与等级特征两方面进行分析,明确大连市游憩地空间拓展规律与特征.结果表明：大连市游憩地的空间拓展呈现以下4种规律：一是呈现出＂广布＋集聚＂的特征;二是呈现＂市内运动休闲,市郊观光游览＂特征;三是游憩地建设基本符合距离衰减规律,而运动休闲游憩地在北部腹地出现了＂反距离＂现象;四是游憩地分布受地理区位限制.     

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