基矛Vega平台的视点控制技术的研究与设计

在实时三维视景仿真的高性能软件Vega平台上,通过建立算法的数学模型,运用向量方法求出动态的视点位置和焦点位置,借助VegaAPI编程,实现了实时动态观察两个物体运动的全过程,并可以动态的调节视点,提高了视点控制的灵活性、可控性,增强了三维视景仿真的真实感和沉浸感。     

Inter‐city migration and policy*

Optimal allocation of people between heterogeneous cities is studied in a club model. Because of externalities, migration alone cannot yield efficiency. First‐best optima are feasible, if the externalities are properly internalized to people's decisions by local or national policy. Yet, implementation of these policies suffers from instability problems and too exacting information requirements. Joint local‐national policy based on individual welfare is superior in these respects. In club theoretic terms, the main finding is that total‐economy viewed policy‐making is not necessary to evoke first‐best efficiency even when the number of non‐homogenous clubs is fixed. In other words, resting on standard Pigovian and Coasian patterns is not needed. Se estudia la asignación optima de individuos entre ciudades heterogéneas en un modelo de club. Debido a las externalidades, la migración por sí sola no puede conllevar eficiencia. Lograr óptimos del mejor primero (first‐best) es factible si las externalidades se internalizan adecuadamente a las decisiones de los individuos mediante políticas locales o nacionales. A pesar de ello, la implementación de estas políticas padece problemas de inestabilidad y requerimientos de información demasiado rigurosos. Las políticas conjuntas locales‐nacionales basadas en el bienestar de los individuos son superiores en este aspecto. En términos de teoría de club, el hallazgo principal es que la formulación de políticas bajo la visión de economía total no es necesaria para insinuar la eficiencia del mejor primero, incluso cuando el número de clubs no homogéneos es fijo. En otras palabras, no es necesario el apoyarse en patrones pigouvianos y coasianos.      

基于视点纠正的鱼眼图像场景化漫游方法

针对鱼眼图像畸变大、表示的场景信息不直观等特点,本文提出了一种 基于视点纠正的鱼眼图像场景化漫游方法。该方法以鱼眼图像所表示的半球空间为观察对 象,通过视点的转移在半球空间进行漫游,以对不同区域内的场景信息进行直观的观察。采 用鱼眼图像校正算法为基础建立鱼眼镜头的球面映射模型,通过映射关系对以视点为中心的 观察区域进行实时校正,当视点变化时对校正后的可视区域进行实时显示从而实现漫游。实 验结果表明,通过本文算法能够实现鱼眼图像所表示半球空间的实时漫游,且漫游时显示的 校正图像满足直线约束标准。     

可持续发展观下的环境法理念

本文在介绍可持续发展观及其内涵的基础上,分别从经济学、法理学和法学三个研究途径揭示了可持续发展观下的环境法理念,即财富最大化理念、世代间衡平理念和环境权理念。     

The graduate student viewpoint on internship preparedness: A 2008 council of university directors of clinical psychology student survey.

To better understand the graduate student viewpoint on quality of preparation provided by graduate programs in terms of the internship application process, the current study surveyed students enrolled in member programs of the Council of University Directors of Clinical Psychology (CUDCP). Six hundred seventy-four students completed a questionnaire designed to assess perceptions regarding preparation for the internship application process, relative prioritization of individual application components, and faculty behaviors that contribute to student anxiety related to the application process. Results demonstrated that student subgroups based on internship status (i.e., those who have not yet applied, current applicants, and current interns) significantly differed on many issues related to internship preparation. The findings suggest that graduate programs are not placing enough emphasis on the conveying of internship-related information early in a student's training. Furthermore, the findings highlight training techniques and faculty behaviors that can be adopted by programs to increase preparedness and reduce anxiety among applicants. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

An adaptive interpolation algorithm for hole-filling in free viewpoint video

Depth image based rendering （DIBR） is an effective approach for virtual view synthesis in free viewpoint television and 3D video.One of the important steps in DIBR is filling the holes caused by disoeclusion regions and wrong depth values.Most of the existing hole-filling methods work well in areas of low spatial activity but fail to obtain satisfactory results in high spatial activity regions.In this paper,we combine the depth based hole-filling and the adaptive recursive interpolation algorithm which is capable of handling edges passing through the missing areas.Accoring to the experimental results,we confirm that the depth based adaptive recursive interpolation algorithm can provide better rendering quality objectively and subjectively.     

中文网络评论观点词汇语义褒贬倾向性判断

由于网络评论信息的庞大,因此通过计算机自动识别出用户评论观点的褒贬倾向性具有重要意义。以基于HowNet的词汇语义相似度方法的词汇语义倾向性分析为基础,根据观点词的褒贬特性改进词汇语义相似度计算方法以适用于评论词汇的倾向性判断,并且考虑词汇与多个基准词相似度较小时弱化个别有价值的较大相似度,从而提高倾向性判断的准确率。实验结果表明,改进后的方法在计算观点词词汇语义相似度时更为合理,并且判断倾向性时准确率有一定的提高。     

基于特征流型的对象跟踪模型

在计算机视觉领域,对象跟踪是一个既重要又极具挑战性的研究课题。跟踪的主要困难体现在物体和背景的外观变化、物体的突发性运动、相机的移动和遮挡。本文提出了一种新的方法来解决对象跟踪问题。采用局部特征集合来表示对象,每一个局部特征组织成特征流形,用来模拟该特征点在各种视角条件下的特征点集合。在跟踪的过程中,我们将更新特征流形集合,来反映对象在运动过程中的变化。同时,通过特征流形和特征点的匹配实现跟踪。相对于传统的特征点与特征点的匹配,特征流形与特征点的匹配方式更加准确。因此,基于特征流形的对象跟踪会取得更加准确的结果。     

生态美学与产品设计

生态美学是在后现代文明阶段产生的一种有关人类生存状态的崭新的美学观,它研究人与自然、人与社会以及人与自身的生态审美关系。在工业化高度发展的当今社会,人们生活中充斥的大量工业产品将人与自然隔离,人对自然的过度索取导致了一系列生态问题,在这种背景下,将生态美学思想引入产品设计领域不仅是对产品设计学科在美学领域的拓展,更能在形式、技术和意境等各个层面唤醒人的自然意识,使人在使用产品的过程中自觉地完成人与自然、人与社会、人与自身问题的再思考。     

水利建设与经济社会可持续发展

水利建设在我国长期发挥着巨大的作用,为了协调水利建设和生态环境及社会发展的关系,本文在全面介绍我国水利建设所取得的成就的基础上,针对我国水利建设中存在的防洪标准偏低、水资源开发过度、环境污染及水土流失加重等问题,按照科学的发展观,提出了新的发展思维和模式,在重视当前发展的同时,重视未来发展的需要。从具体的国情出发,借鉴国外的先进经验,在技术、经济、管理及运营体制等方面采取相应的对策,使水利成为国民经济和社会发展的可靠保障。