云南省城镇居民消费性支出与可支配收入的实证分析

可支配收入是影响城镇居民消费最具决定性的因素,在对云南城镇居民人均可支配收入、人均消费性支出与全国平均水平对比分析的基础上,得出2006年云南城镇居民收入超过万元、城镇居民消费性支出与可支配收入之间存在简单线性回归关系的结论,提出建立正常增效机制、大力发展经济、完善社会保障体系、制定满足各层次居民消费需求的消费政策建议。     

城市融入对流动人口家庭消费水平的影响——基于全国流动人口监测数据的分析

流动人口是推动城镇化的重要力量，对于国民经济健康持续发展具有重大意义。文章从需求角度出发，借助2018年流动人口动态监测调查微观数据，检验城市融入程度对流动人口家庭消费水平的影响效应及其稳健性。结果发现：我国流动人口家庭城市融入度高的占比三成左右，且城市融入度高对其家庭人均月消费支出具有显著效应。具体来看，城市融入度与家庭消费支出结构存在异质性效应，即城市融入度与流动人口家庭除住房外人均月消费支出具有正向作用，但其与流动人口家庭住房人均月消费支出成反向作用。     

城镇居民人均可支配收入对人均消费支出的影响研究——基于凯恩斯消费函数的实证分析

根据安徽铜陵市1990-2010年城镇居民人均可支配收入和人均消费支出统计数据,依据凯恩斯消费函数,运用协整理论和误差修正模型,分析了铜陵市城镇居民人均可支配收入对人均消费支出的长期和短期影响,发现两者无论在长期还是在短期内均存在高度的相关性,并对提高城镇居民人均可支配收入提出了相关建议。     

基于协整理论研究我国城镇居民健康投资与居民消费性支出

健康是社会、经济发展的基础,随着时代的进步与人们健康意识的提升,有目的、有效果的健康投资正逐渐受到重视,因此研究居民健康投资的影响因素成为重要的研究课题.本文以我国城镇居民为研究对象,基于协整理论,对我国城镇居民健康投资与消费性支出作协整分析,得出以下结论: 人均健康投资逐年增加;健康投资占家庭人均可支配收入的比率呈明显上升趋势;健康投资与消费支出呈正向的线性关系,且二者具有协整关系,存在长期均衡的关系,它们短期失衡的关系会在下一期得到调整.     

“餐桌经济“有引力

经济界人士预计，随着饮食结构的改善，我国食品消费具有巨大增长潜力，“餐桌经济”可成为中国农民提高收入的重要增长点。据统计，城镇居民家庭去年人均消费性支出为4946元。照此计算全年全国城镇家庭的“餐桌经济”规模可达8257亿元，农村的餐桌消费也有惊人规模。据抽样调查，1996年农村人均食品支出为885．4元，按全国当年农村总人日计算，“餐桌消费”的总规模即为7651亿元。经济界人士指出：我国现在餐桌的变化还基本属于“数量型”，今后餐桌内容的“质量型”、“品种型”的变化会日益明显，餐桌市场的增长潜力更加惊人。据调查，我…     

城镇居民的消费结构分析——以重庆市为例

选取2004—2014年重庆市城镇居民的消费数据,分析城镇居民的消费情况和变动趋势,然后借助扩展的线性支出系统模型(ELES模型),对2014年按照收入5等份分组的城镇居民消费支出数据进行统计研究,对城镇居民的基本需求支出、消费倾向和消费弹性进行数量分析,揭示重庆市城镇居民的消费特征和趋势.食品和居住的基本需求大,消费倾向高;教育文娱的基本需求支出位于前列;交通通讯的边际消费倾向跃居第3,收入弹性大于1,未来增长势头较好;食品价格对其他各类消费品需求的影响最大;交通通讯的自价格弹性较大;随着收入的增加,呈现多样化的消费方式.最后在此基础上提出相应的对策.     

消费函数的数量分析

根据凯恩斯的绝对收入假说建立消费函数模型,使用1978～2005年28年的四川省城镇居民家庭收支基本情况的统计数据对模型进行回归分析检验。由于所用数据为时间序列数据,所以对消费与收入关系进行了协整分析(单位根检验和协整检验)。结果表明:四川省城镇居民年人均消费性支出与年人均可支配收入之间存在长期的均衡即协整关系;进一步研究消费与收入关系的短期动态关系,并就如何提高居民消费水平提出建议。     

重庆城镇化率与城乡居民消费支出关系研究

以重庆市1996-2011年的年度数据为基础,研究了城镇化发展对城乡居民消费水平的影响;实证结果表明：重庆市城镇化水平与城镇居民消费支出具有协整关系,与农村居民消费支出没有协整关系,城镇化的发展能够促进城镇居民消费支出的增加,城镇化的发展是城市居民消费支出增加的原因,而城市居民消费支出增加并不能促进城镇化的发展.     

我国城镇居民旅游消费影响因素的实证分析

在经济刺激和人民需求的双重作用下,我国旅游业迅速发展,然而如何让旅游业对第三产业乃至整个国民经济产生更大的贡献,即如何增加我国的旅游消费需求,是我们应该注重的问题。选取城镇居民人均可支配收入、城镇居民消费价格指数、黄金周制度三个变量建立VAR模型,得出人均可支配收入与黄金周制度对旅游消费支出具有直接、长期持续的促进作用。并提出增加人均可支配收入、增强居民旅游消费观念、建立合理的假期制度等相关建议。     

河南省各市县城乡居民生活水平的区域差异

运用聚类分析方法对河南省2000,2005,2010—2013年城镇和农村居民人均可支配收入及2013年家庭消费支出情况进行分析,将全省各市县按照居民生活水平划分为较高、中等、较低三类区域,为进一步研究河南省居民收入和消费区域间差异提供依据.结果显示,河南省各市县城镇居民的收入和支出普遍高于本地的农村;省会郑州市无论是城镇居民还是农村居民,收入及消费水平均是最高;省会周边的农村和自然环境较好的农村,如巩义市、济源市、鹤壁市等,居民生活水平较高;工业、旅游业发达的地区,如洛阳市、济源市、三门峡市等,城镇居民的收入及消费水平也较高.     

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.     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

英文诗歌中的喻类修辞

为了有助于提高英文爱好者的个人情操、文化素养和学习兴趣,以及专业人员对英语学习和研究进行多途径的探索,本文通过一些精选诗歌的引证和分析,着重论述了喻类修辞法在英文诗歌中的运用其及效果。     

Man Is Unable to Change the Miserable Life——Analysis of the Arrangement of Four Characters in The Glass Menagerie

Tennessee Williams is considered as one of the most important American playwrights since World War II.The Glass Menagerie is his first successful drama,which describes a tragic situation of family and means to say that Man is unable to change the miserable life,no matter whatever means he try,This essay focuses on the analysis of the arrangement of the four main characters:Laura.Amanda,Jim and Tom to reveal the theme.Laura is fragile.Amanda is brave.Jim is vital.Tom is sensible.And all of them develop and try the different means to struggle against life,but fail tragically.With the evidence,the paper comes to conclusion naturally that Man is unable to change the miserable life,and he dooms to fail.     

Characterization of root-nodulating bacteria on Retama raetam in arid Tunisian soils

The aim of this study is to investigate the diversity of Retama raetam root-nodule bacteria isolated from arid regions of Tunisia. Twelve isolates, chosen as representative for different 16S rRNA gene patterns, were characterized by 16S rRNA gene sequencing and phenotypic analysis. Isolates were assigned to Sinorhizobium, Rhizobium and Agrobacterium. Symbiotic properties of Sinorhizobium and Rhizobium isolates showed a large diversity in their capacity to infect their host plant and fix atmospheric nitrogen. Strain RK 22 identified as Rhizobium was the most effective isolate.     

An Affordable Accurate Evaluation of the Binding Conformations Predicted by Molecular Docking Studies in Bio-System

正Recently,docking has been widely used to predict the binding-modes of protein-inhibitors,when the crystal complexes structure was absent.Most docking algorithms are able to generate a large number of probable conformations,it,however,is difficult to effectively evaluate these docking poses and identify the most reasonable bindingmode.In the present study,on the basis of the crystallographic data of human 3-hydroxy-3-methylglutaryl coenzyme     

WIMAX与WI-FI技术分析及联合组网

介绍了WiMAX与Wi-Fi两种无线宽带接入技术,并对两者之间的关系及相互之间的影响做了对比及分析,并对WiMAX的关键技术进行了详细说明,最后对两者的联合组网方式做了简单的探讨。