在服装三维设计和模拟中的模型设计研究

模型的设计在三维服装设计和模拟中起着十分重要的作用.提高服装设计仿真的速度、改善仿真的效果都与模型的设计方法有着十分密切的关系.文章研究了建模的一般方法,并就网格边界线三维建模的数据计算和仿真问题进行了比较深入的探讨.     

《自动控制原理》课程教学改革的研究与实践

针对《自动控制原理》课程的特点及教学过程中存在的问题,从工程应用角度改进教学内容,提出以解决实际问题为主线,采用仿真教学、理论与实践有机结合的教学方法。实践证明,这种教学方法这种教学方法避免了学生学习的盲目性,提高了学习积极性及教学效果。     

海南省高新技术产业发展规划研究

高新技术产业的发展已经成为21世纪国际经济竞争和科技竞争的焦点。对我国高新技术产业的发展进行预测与规划研究,具有重要的理论意义和现实的指导意义。本文运用系统工程学的多目标决策分析方法对海南省高新技术产业的发展建立了多目标规划模型,而后利用历史数据进行仿真运算;在此基础上,对海南省未来高新技术产业的发展提出了可行性建议。     

计算机模拟方法在民族学与人类学研究中的应用

计算机模拟方法作为一种强有力的研究手段,已经在国外的民族学与人类学研究中得到应用和发展.这种现代化的研究工具与民族学和人类学传统的经典方法相结合,为学者们的研究开辟了新的道路.国内在这方面还处于起步阶段,在世界学术信息交流日益紧密的今天,我们奋起直追还不算晚.     

ON SELECTING VARIABLES AND ASSESSING THEIR PERFORMANCE IN LINEAR DISCRIMINANT ANALYSIS

Linear discriminant analysis between two populations is considered in this paper. Error rate is reviewed as a criterion for selection of variables, and a stepwise procedure is outlined that selects variables on the basis of empirical estimates of error. Problems with assessment of the selected variables are highlighted. A leave-one-out method is proposed for estimating the true error rate of the selected variables, or alternatively of the selection procedure itself. Monte Carlo simulations, of multivariate binary as well as multivariate normal data, demonstrate the feasibility of the proposed method and indicate its much greater accuracy relative to that of other available methods.     

浅谈数字电视的数据压缩技术

数据压缩技术是数字电视的核心技术。本文从数字电视的数据压缩的必要性,数据压缩编码的客观依据,数字电视的信源编码、信道编码方法,数字电视的音、视频编码的国际标准等方面来阐述数字电视的数据压缩技术。     

The cult of Champ Man: the culture and pleasures of Championship Manager/Football Manager gamers

This paper considers the popularity and social significance of the gaming series Championship Manager/Football Manager. Sport-related games continue to be one of the most popular forms of digital gaming, and the series has proved to be one of the most successful of all time. Drawing on 32 interviews with game players and developers of this series, this paper argues that this series has proved particularly popular due to its 'intertextual' links to the sport of football, which allows this game to be drawn on as a resource in conversations and social networks. In particular, this paper argues that aspects of gaming, such as performativity and control, extend and cross-cut with wider social formations. Hence, the author argues that it is crucial that considerations of digital games seek to locate these within wider social and cultural patterns.     

连续铸铁管凝固过程的计算机数值模拟

本文在对连续铸管冷却过程的热传导进行了分析以后,建立了连续铸管热传导的一维数学模型,并利用微机进行了模拟计算,这样不仅大大节省了计算时间,而且还不失正确性及其精度,这对制订合理的连续铸管工艺具有积极的意义.     

Ancestral Inference in Population Genetics Models with Selection (with Discussion)

A new algorithm is presented for exact simulation from the conditional distribution of the genealogical history of a sample, given the composition of the sample, for population genetics models with general diploid selection. The method applies to the usual diffusion approximation of evolution at a single locus, in a randomly mating population of constant size, for mutation models in which the distribution of the type of a mutant does not depend on the type of the progenitor allele; this includes any model with only two alleles. The new method is applied to ancestral inference for the two‐allele case, both with genic selection and heterozygote advantage and disadvantage, where one of the alleles is assumed to have resulted from a unique mutation event. The paper describes how the method could be used for inference when data are also available at neutral markers linked to the locus under selection. It also informally describes and constructs the non‐neutral Fleming–Viot measure‐valued diffusion.     

基于投影的fMRI时间序列图像配准方法研究

利用投影技术,针对功能磁共振时间序列图像,介绍了一种新的自动图像配准方法。该方法将序列图像二值化后沿着水平方向或垂直方向进行投影,根据投影向量元素的位置和大小,快速地计算出图像的旋转、平移运动的变化参数。仿真实验和实际的功能磁共振应用证实了该方法的有效性。