黔东南旅游信息资源稀疏性聚类挖掘算法

黔东南旅游景点丰富,去黔东南旅游的游客不断增多,旅游分流压力较大,为了解决这问题,需要对黔东南旅游信息资源进行共享处理和研究。提出了基于子网格的黔东南旅游信息资源稀疏性聚类挖掘算法,实现基于移动互联网的黔东南旅游信息资源共享服务。在网络模型中对旅游信息进行子网格分区,构建了基于3G移动网络的旅游资源信息共享网络系统,系统采用的树形结构设计,对资源信息流进行信号模型构建,实现不同应用条件下的最佳匹配权值。对于每个时间片的旅游信息在受到用户访问时,产生任务请求调度指令,产生资源信息流向量模型,采用Baum-Welch算法对隐马尔科夫链模型进行训练,采用子网格分组特征提取,计算数据的稀疏性协方差矩阵,实现对基于子网格的旅游信息资源稀疏性聚类挖掘。研究结果表明,构建的信息资源挖掘算法,挖掘的效果最佳,信息共享预测误差在2%以内,实现了旅游信息的共享服务,提高黔东南地区的旅游服务质量。     

九寨沟景区初态聚类分流实证研究

根据前期对九寨沟景区运行现状的仿真模拟以及对景区旺季客流的时空变化特征的分析,得出无论从时间还是从空间上来说,景区内各景点旅游负荷均呈现出不均衡的状态。进一步的研究分析发现,导致这一后果的主要原因之一在于,系统处于初态时对于景区内游客的分流措施不得当。为此,本文提出采用聚类分析法对景区内景点进行聚类,确定初态分流区域及其分流比例,作为初始方案,并建立数学模型,使用LINGO软件求解,结果表明,车辆在各分流区域的分配比例基本符合按照区域容量所求出的初态分流比例,这为后期的稳态和终态时空分流导航研究奠定了基础。本文的研究是达到总目标:整个系统内各景点负荷均衡,提高景区游客旅游价值,实现景区生态保护与经济的协调发展所不可或缺的步骤。     

基于游客认知景点排序的西藏旅游资源信息服务

该研究以西藏自治区旅游景点数据库为数据源,基于游客对各景点认知的知名度,进行景点整体排序和数据库优化,设计景点查询模块;基于MVVM+RIA Service架构设计GIS平台,实现了旅游资源信息服务。     

基于Logit模型的北京世界遗产地游客选择研究

世界遗产是北京建设世界旅游城市重要的资源基础,而世界遗产地的旅游发展很大程度决定于游客决策。尽管我国在游客决策相关领域已有一定研究成果,但是针对世界遗产地游客决策行为的研究仍然十分欠缺。本文以北京世界遗产地游客为研究对象,基于二项Logit模型,分析探讨了游客选择的模式差异以及景点选择的影响因素。研究结果显示：①认知（“是否为世界遗产”和“是否为北京代表性景点”）影响与景点知名度成反比,北京6个世界遗产地总体可以分为三类,其中故宫主要受游客特征和旅游形式的影响,颐和园、长城、天坛同时受到认知和旅游形式的影响,十三陵和周口店仅受到游客认知特征的影响;②近距离负面影响游客对高知名度景点的选择,而短期游客会更倾向于选择高知名度景点。因而,建议加强低知名度景点的认知和景点独特性的宣传,关注重点群体,丰富旅游体验,提升景点综合竞争力。     

模因组融合信息度传递的溢出类漏洞线性预测

对缓冲区的溢出类漏洞的线性预测是提高漏洞挖掘效率的重要一环,传统方法采用粒子群扰动聚类方法进行溢出类漏洞的预测和挖掘,存在预测精度不准的问题。提出一中基于模因组融合信息度传递的缓冲区溢出漏洞线性预测方法,实现对安全漏洞的准确检测。采用四叉树算法对混合粒子群多维数据进行数据预处理,采用模因组融合信息度传递,结合高斯变异对其进行扰动以代替随机产生新粒子个体的操作,实现对海量多模态数据的优化聚类和线性预测。实验结果表明,算法能准确跟踪溢出类漏洞的演化轨迹,实现对溢出类漏洞的线性预测,预测精度提高24.3%,漏洞挖掘性能提高,保证了应用信息应用环境安全。     

基于九寨沟景点负荷均衡的时空分流导航研究

全球旅游业的发展趋势对现代旅游管理提出了新的要求,如何实现旅游业的经济效益、社会效益与生态效益的协调发展逐渐成为社会各界关注的焦点。研究在对九寨沟进行了全面考查的基础上,分析了旅游旺季景区内客流的时空变化特征,指出由于游客在时间和空间上的分布不均衡,导致各景点负荷差异明显,使旅游和生态不能协调发展。因此有必要设计合理的游客分流方案,实现景区生态保护与经济发展的协调。文章研究内容属于景区时空分流导航研究的理论基础,它构建了面向景点负荷均衡的数学定量描述,从建立数学规划模型和动态预测调度两个方面提供了问题分析思路,并提出在预测调度中嵌套车辆调度。     

云计算架构下旅游信息资源优化调度模型

在云端旅游信息管理系统中,旅游信息数据包括旅游资源数据和旅游开销数据以及旅游人群的偏好数据等,需要对该类海量复杂数据资源进行优化调度,有助于提升城市的整体旅游水平。提出一种基于分布式B树调度方法的云计算架构下旅游信息资源优化调度模型。得到旅游信息资源网络树形结构,采用PCA分析方法,能有效地对输入系统的一些冗余信息进行清除过滤,保证输入信息数据的贡献率,构建旅游信息的相似度匹配特征函数,得到旅游信息稀疏性特征方程,对其采用截断归类分析方法,并基于大数统计原理,实现对于旅游信息的概要分析,实现旅游信息数据优化调度。仿真结果表明,该模型对旅游资源旅游信息数据调度和预测准确率提高显著,特征提取的状态信息参量全面,最终可以得到近10年的成分因子得分,实现对旅游资源的优化调度和挖掘。     

旅游网站信息质量与游客满意度关系研究——基于出游决策的中介作用

构建了旅游网站信息质量与游客满意度的关系模型,引入出游决策中介变量,采用描述性统计分析、信度与效度分析、中介效应分析等方法,运用结构方程模型探讨旅游网站信息质量、游客满意度与出游决策3者之间的作用关系。研究发现:旅游网站信息内容质量受全面性和准确性指标的影响,旅游网站信息表现形式质量受指标易懂性和格式适宜性的影响。旅游网站信息质量既可以直接正向影响游客满意度,也可以通过出游决策的部分中介作用间接正向影响游客满意度;旅游网站信息表现形式质量比信息内容质量对游客满意度的影响更为显著;游览景点和出游伴侣是游客主要考虑的决策项目,在与旅游网站信息进行对比后,游客更为关注旅游目的地食宿和游玩娱乐方面的信息,并基于研究结果对旅游网站设计管理提出建议。     

面向知识服务的多模态资源知识重组研究

[目的/意义]多模态资源虽类型丰富但分散无序,挖掘多模态资源间隐含的知识关联进而实现跨模态、多角度的知识重组,对于多模态资源的智能管理与深层服务都具有重要的价值。[方法/过程]文章立足知识服务的特点与需求,结合多模态资源的特征,探讨多模态资源的知识挖掘方案,并基于此方案探讨可通用的多维度知识重组方案。在此基础上,以多模态红色资源为代表,通过对红色人物陈毅相关多模态资源的获取与处理,实现相关文本、图像、视频资源的知识重组,开发了可视化知识服务平台“陈年毅事”,并从时间、地点、人物、主题等不同维度探讨了可视化知识服务的实现路径。[结果/结论]通过实证研究,验证所提出知识重组方案的适用性与可行性,可以为多模态资源的深度挖掘、多维组织与服务应用提供一定的借鉴与参考。[局限]图像及视频资源有待更深层的挖掘;知识关联方式还有待补充。     

旅华外国团队旅游流地理分布和网络结构特征研究

采用访谈法和问卷调查法,在北京、上海和西安等城市采集入境游客信息;运用地图法和社会网络分析法对旅华外国团队旅游流的地理分布和网络结构进行研究,主要结论为:①外国团队旅游流以北京和上海为主要出入境口岸,流动地区集中在中国人口线东南部;②外国团队旅游流的有向流动符合“二八定律”,即80％的有向流动产生在20％的城市对之间;③外国团队旅游流网络为核心-边缘网络,核心区包括北京、西安、上海等13个节点;④旅行社设计的线路对外国团客出入境口岸选择、团队旅游流的地理分布和流动均具有决定性影响.最后,根据研究结论提出了优化网络结构、拓展中国入境旅游外国市场的建议.     

Students' Reactions to the Introduction of Videoconferencing for Classroom Instruction

This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors.     

Cooler temperatures inductive to locust outbreaks

Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.     

The Role of Intermediating Institutions in the Diffusion of Electronic Data Interchange (EDI): How Industry Associations Intervened in Denmark, Finland, and Hong Kong

Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies.     

Low doses of a red wine ingredient figh diabetes in mice

Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said.     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.     

Rough Justice: A Statistical Assessment of ICANN's Uniform Dispute Resolution Policy

Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP.     

Prevalence of soft neurological signs in Chinese people

Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.     

Molecular motor assembly of a biomimetic system

Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction.     

Monoculture Rubber Plantations Have Negative Ef ects on Controlling Splash Erosion

<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence