中国入境旅游流的空间分析

以入境旅游流 (客流 )为研究对象 ,以中国 1 2个旅游热点城市 (京、沪、苏、杭、宁、西、穗、深、厦、桂、昆、蓉 )为实证 ,凭借大量的市场调查和国家旅游局有关资料 ,利用地理空间分析方法 ,研究了来华入境旅游流、入境后旅游流的空间动态规律 .     

中国入境旅游流的空间分析

以入境旅游流（客流）为研究对象，以中国１２个旅游热点城市（京、沪、苏、杭、宁、西、穗、深、厦、桂、昆、蓉）为实证，凭借大量的市场调查和国家旅游局有关资料，利用地理空间分析方法，研究了来华入境旅游流、入境后旅游流的空间动态规律。     

基于因子分析下的入境欧洲游客住宿选择行为

利用全国6大旅游热点城市进行的入境游客抽样调查资料，运用多元统计分析中因子分析方法，对来华旅游的英国、法国等欧洲11国的旅游者的住宿影响因素及其偏好进行了定量分析和评价，发现不同国家来华游客住宿的消费倾向存在明显差异。从而为旅游管理部门进行旅游决策提供参考依据。     

丝绸之路沿线旅游城市气候比较优势分析

城市气候资源是宜居、休闲城市重要的评价条件,旅游城市气候资源对城市旅游业具有影响显著.随着我国"一带一路"战略的实施,丝绸之路经济带的旅游业再一次被推倒历史的前沿.本文通过对丝绸之路(中国段)沿线14个旅游城市的气候资源进行模糊综合评价认为,西宁市综合舒适度指数在0.953,居丝绸之路沿线14个旅游城市之首,属于唯一非常舒适型旅游城市,武威、张掖、兰州、酒泉属于舒适型,伊宁、银川、玉门为基本舒适型,哈密、吐鲁番、乌鲁木齐、西安、宝鸡为不舒适型旅游城市.     

来华美国旅游者旅游偏好的实证研究

目的通过分析旅华美国游客的旅游偏好行为,为中国开拓与巩固美国客源市场提供科学依据。方法利用市场调查、实证分析、数理分析方法,以项目组2004年7至8月,在中国6个旅游热点城市美国旅游者的市场调查资料为基础来进行分析研究。结果揭示了来华美国游客对旅游产品、旅游方式、住宿选择方式、饮食方式、旅游商品、旅游娱乐项目的偏好规律。结论美国游客的旅游偏好具有较强的规律性,表现为追求文化异质性较强的旅游产品、喜爱参与性强、刺激性大的旅游项目等。     

入境游客特征与我国旅游服务质量评价体系的典型相关分析

对入境游客特征与我国旅游服务质量评价体系之间的相关性研究。有利于提高我国旅游服务质量。根据国家自然科学基金项目组在2004年对我国6大旅游热点城市的入境游客抽样调查资料,选取游客的受教育程度、年收入、年龄为入境游客特征,住宿、餐饮、交通、购物、娱乐、导游服务、邮电通讯为我国旅游服务质量评价体系,运用典型相关分析,对它们之间的相关性进行统计分析。得到入境游客的年收入与我国旅游服务质量评价体系中的住宿和交通是正相关关系,表明经济越发达国家的游客对我国的住宿和交通方面的旅游服务质量评价越好．     

我国旅游热点城市境外游客的消费决策特征分析

研究了我国旅游热点城市境外游客的消费特征，通过对北京、上海、西安等城市境外施客抽样调查资料和多年统计资料的分析，总结出境外游客在进行旅游目的地选择渠道等消费决策对表现出的规律性特征，即境外游客易选择山水风光优美、文物古迹和民俗风情丰富的旅游地；在购渠道和住宿购物方式上呈多样化，并分析了其影响因素，为旅游热点城市的旅游业发展提供基础信息。     

海外旅游者对旅游目的地和旅游路线的选择研究

研究了海外旅游者对旅游目的地和旅游路线的选择规律.利用项目组在12个旅游热点城市的市场调查结果,结合近些年国家旅游局海外旅游者抽样调查资料,运用旅游地理学和市场学的基本原理,总结出海外旅游者选择旅游目的地和路线的规律性,即海外旅游者多前往经济发达、资源丰富的旅游目的地;传统的旅游黄金线路仍然是海外旅游者在境内移动的主要旅游路线.     

采用出行时空耦合的厦门岛城市旅游服务设施布局

以福建省厦门市厦门岛为研究区域,提取旅游服务设施的兴趣点(POI)数据,采用核密度估计法,分析厦门岛不同旅游服务设施空间布局.由于旅游住宿与旅游景区的空间布局较为吻合,研究选取旅游日(2019年5月1-4日)和工作日(2019年3月11-15日)的浮动车数据,通过缓冲区分析选取旅游住宿影响范围内的浮动车出发地-目的地(OD)数据,并进一步构建旅游住宿与游客出行时空的耦合度模型.结果表明:旅游服务设施(除交通枢纽外)在空间上表现为沿景区集聚;旅游住宿与餐饮的空间布局与旅游景区的布局基本吻合,购物中心、文化娱乐与交通枢纽的空间布局与旅游景区的布局存在差异;旅游日相比工作日耦合度的分布区域范围较广,耦合性较好的区域在旅游日主要集中在重要的交通枢纽及主要景区,部分景区可能存在旅游住宿供大于需的现象.     

我国旅游热点城市境外游客的消费决策特征分析

研究了我国旅游热点城市境外游客的消费特征．通过对北京、上海、西安等城市境外游客抽样调查资料和多年统计资料的分析,总结出境外游客在进行旅游目的地选择、旅游形式,旅游购买渠道等消费决策时表现出的规律性特征,即境外游客易选择山水风光优美、文物古迹和民俗风情丰富的旅游地;在购买渠道和住宿购物方式上呈多样化．并分析了其影响因素,为旅游热点城市的旅游业发展提供基础信息     

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.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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.     

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     

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。