一种人眼运动及表情仿真方法

真实感人脸动画是计算机图形学领域的一个研究热点,为了更逼真的仿真虚拟人眼部的表情动作,提出了一种基于机构学原理与肌肉模型的人眼运动及表情仿真方法。可将人眼眼皮的三维网格模型分为边界点和非边界点分别控制,对于边界点的运动采用机构模型实现,对于非边界点及眼部其余部分采用肌肉模型控制,仿真出不同的人眼运动及表情。同时给出了仿真运动的效果实例。采用上述方法可以得到逼真的人眼表情动作仿真动画,效果良好。     

基于统计的音乐摘要研究

随着Intemet的发展,大量音乐资源在网络上涌现,对音乐资源进行有效检索标识是很有必要的,而摘要的意义显得尤为重要.音乐摘要是文本摘要研究在音乐检索领域的一个比较新的应用.综合使用统计相关原理和文本挖掘相关研究理念,对音乐资源进行一定研究,为音乐检索提供新的参考.     

Measuring ranked list robustness for query performance prediction

We introduce the notion of ranking robustness, which refers to a property of a ranked list of documents that indicates how stable the ranking is in the presence of uncertainty in the ranked documents. We propose a statistical measure called the robustness score to quantify this notion. Our initial motivation for measuring ranking robustness is to predict topic difficulty for content-based queries in the ad-hoc retrieval task. Our results demonstrate that the robustness score is positively and consistently correlation with average precision of content-based queries across a variety of TREC test collections. Though our focus is on prediction under the ad-hoc retrieval task, we observe an interesting negative correlation with query performance when our technique is applied to named-page finding queries, which are a fundamentally different kind of queries. A side effect of this different behavior of the robustness score between the two types of queries is that the robustness score is also found to be a good feature for query classification.      

Social network,social trust and shared goals in organizational knowledge sharing

The aim of our study was to further develop an understanding of social capital in organizational-knowledge-sharing. We first developed a measurement tool and then a theoretical framework in which three social capital factors (social network, social trust, and shared goals) were combined with the theory of reasoned action; their relationships were then examined using confirmatory factoring analysis. We then surveyed of 190 managers from Hong Kong firms, we confirm that a social network and shared goals significantly contributed to a person's volition to share knowledge, and directly contributed to the perceived social pressure of the organization. The social trust has however showed no direct effect on the attitude and subjective norm of sharing knowledge.     

数据结构教学方法的探讨与研究

本文针对数据结构这门课程在教学中存在的问题．提出了一些解决方法。     

一种基于知识发现的拓展型竞争情报系统

目前,制约竞争情报发展的一个关键问题就是情报的收集与分析手段比较落后,远远不能胜任竞争情报系统所蕴含的特点和功效。本文将竞争情报作为一种特殊的知识,吸纳知识发现理论成果和方法,提升现有竞争情报系统的构造技术,真正做到快速、全面、准确和智能化的竞争情报生成和利用。     

Weight distribution and dual distance

Several results in coding theory (e.g. the Carlitz-Uchiyama bound) show that the weight distributions of certain algebraic codes of lengthn are concentrated aroundn/2 within a range of width n. It is proved in this article that the extreme weights of a linear binary code of sufficiently high dual distance cannot be too close ton/2, the gap being of order n. The tools used involve the Pless identities and the orthogonality properties of Krawtchouk polynomials, as well as estimates on their zeroes. As a by-product upper bounds on the minimum distance of self-dual binary codes are derived.     

A primary influence vertex approach to identify driving factors in complex integrated agri-industrial systems – an example from sugarcane supply and processing systems

Integrated agri-industrial systems (IAISs), such as sugarcane supply and processing systems, are complex systems and hence generally difficult to understand and manage. The large number factors in IAISs coupled with the complex interrelationships among the factors make it challenging to identify the points of intervention for improving their overall performance. Several approaches, such as the network theory and the Theory of Constraints have been used to identify important factors in systems with variations in success. This paper demonstrates a primary influence vertex approach for identifying and ranking the factors that drive the performance of IAISs. The approach is based on comprehensive causal network analyses and was tested in four relatively diverse large-scale sugarcane milling operations in South Africa. Results from the analyses were found to be consistent with the literature and external knowledge of the milling areas as at the time of the study. It is concluded that the approach can proffer a sound basis from which deeper rooted problems in systems can be identified on an ongoing basis. It is, however, recommended that the approach should be systematically compared with other relevant methods that are used to analyse complex systems.     

基于模糊PI控制的交流调速系统研究

传统PI控制器以固定不变的PI参数去处理变化多端的动态过程,很难满足各种工况下的性能指标。针对这一问题,本文将模糊控制理论引入到交流调速系统的PI控制器中,实现PI参数的实时调整,显著地改善调速系统的动态性能。仿真实验表明,在同等实验条件下,模糊PI控制的动态性能优于传统PI控制的性能。     

支付系统实验环境建设探索与研究

支付系统在经济活动中扮演了重要角色,为了让金融及电子商务等专业学生掌握支付系统的业务流程和让科研人员对支付系统进行研究,有必要建立支付系统的实验环境.本文细致深入地分析了支付系统实验环境应具有的功能、建设目标和软硬件环境,对高校开设支付系统相关的课程和建设实验环境提供了有价值的参考.