一种去除图像运动模糊的算法

根据运动对图像所造成的图像模糊的原因及特点,本文介绍了关于运动模糊图像的退化模型,并提出了一个新的运动模糊图像恢复算法。首先利用radon变换可以检查直线方向的特性估算出运动模糊方向,然后运用自相关运算估算出运动模糊长度,从而确定点扩散函数的两个主要参数值。最后用维纳滤波对图像进行复原。实验结果表明,这种方法能够比较精准地估算出点扩散函数参数值,并很好的复原了运动模糊图像。     

基于自适应聚类的图像预处理算法

彩色图像已经在研究和应用中逐步取代了黑白图像.对于图像的预处理目前有很多算法,各有利弊.本文提出的一种基于自适应聚类的图像预处理算法,结合GLA (Generalized Lloyd Algorithm) 算法,对图像颜色空间进行离散化,并利用颜色空间每一个像素点的颜色权值,来计算得到聚类中心的颜色值.该算法可以简化图像特征数,为图像的进一步处理打下良好的基础.     

图像，一种改变世界的方式

美国人米尔佐夫在一本叫做《视觉文化导论》的书里，提到了一个很有趣的词儿“像素图像”（Pixelated Image）。     

A look at an interactive classroom-based drug abuse prevention program: interactive contents and suggestions for research

Interactivity has been shown to be a critical element of effective drug abuse prevention programs. This study examined the contents of Project Towards No Drug Abuse, a program that has revealed strong effects only when delivered in a highly interactive version. Types of teacher and student interactive messages were identified. It is speculated that explicit action on the part of the teacher to have students make statements and ask questions of one another may be the essence of effective drug education program delivery. Suggestions for future research on interactivity were made.     

A note on images of networks

Visual imagery and visual representations have proven very useful in some of the most important discoveries in the history of science. It is not surprising, therefore, that the earliest students of network phenomena often made use of visual representations (e.g. sociograms) to assist in the analysis, interpretation and illustration of complex relational data: by creating such visual representations, human faculties for visual imagery and pattern recognition could be more fully utilized in the search for structural patterns in sociometric networks. What is somewhat surprising, though, is that the techniques for creating visual representations of relational data have remained virtually unchanged since the study of social networks began: the slow, tedious, pen-and-ink approach of forty years ago is still very much the method of the day.Readily available computer graphics technology, however, introduces potentially powerful possibilities, and some of these are explored. The results of this initial exploration suggest that the time is ripe for forging new tools that will facilitate the analysis of complex relational data, stimulate the development of network theory, and provide new perspectives from which to view previously hidden facets of society.     

A smallest tournament for which the Banks set and the Copeland set are disjoint

Given a tournament T, a Banks winner of T is the first vertex of any maximal (with respect to inclusion) transitive subtournament of T; a Copeland winner of T is a vertex with a maximum out-degree. In this paper, we show that 13 is the minimum number of vertices that a tournament must have so that none of its Copeland winners is a Banks winner: for any tournament with less than 13 vertices, there is always at least one vertex which is a Copeland winner and a Banks winner simultaneously. Received: 2 May 1997 / Accepted: 30 September 1997     

A framework for a sociology of visual images*

Bakhtinian dialogical theory suggests a model for the sociology of visual images that focuses on the social geography of the maker of the image, the “hero” or topic of the image, and the viewer for whom the image is intended. The model is illustrated in the context of the sociology of painting with reference to three art‐historical monographs and to three artists who worked in colonial urban Quebec.     

Ergonomic sustainability based on the ergonomic maturity level measurement

This paper aims at the application of an ergonomic maturity model (EMM), in order to assess the ergonomic sustainability outreach of ergonomic actions. This proposition was motivated by the widespread sensation that the development of the discipline, its educational devices and related practices depends on the attitude of ergonomics practitioners rather than environmental macroergonomic conditions. Maturity modeling in this paper is undertaken as a tool for ergonomic practitioners. Thus, its foundations were uprooted from diverse fields: Clinic Psychology, Quality Management and Project Management. The paper brings about a detailled explanation of this ergonomic maturity tool. The empirical part is fulfilled by the examination - using the EMM - of four emblematic cases excerpted from our research lab ergonomic portfolio.     

A note on the non-emptiness of the stability set

Peleg (1978) presents a necessary and sufficient condition for the non-emptiness of the core, by considering quota games. The purpose of this paper is to present a similar result for the non-emptiness of another solution concept introduced by Rubinstein (1980) and called the stability set. Received: 25 January 1999/Accepted: 6 July 1999     

A definition and set of principles for responsible consumption of gambling

Responsible consumption of gambling (RCG) is now a major paradigm driving industry, government and public health measures that aim to prevent or minimize gambling-related harm. This is reflected in the pervasive message to ‘gamble responsibly’. However, few attempts have been made to define the concept or identify its foundation principles, resulting in substantial ambiguity over what RCG means and its essential characteristics. This study addresses this void by synthesizing findings from a systematic literature review, website analysis and online survey of 107 experts – to develop a set of underlying principles and a definition of RCG. These tasks were facilitated by the reasonably consistent principles found to underpin RCG in the three data sources, despite wide variations in how the construct has previously been defined. Thus, the set of principles of RCG developed in this study (affordability, balance, informed choice, control, enjoyment, harm-free) should attract wide acceptance, as should the definition given that it combines and summarizes these principles. Adopting a consistent definition and set of RCG principles will provide a basis for developing consistent guidelines for consumers, offer direction for public health efforts for gambling harm minimization, and inform government policies and industry measures aiming to support safe gambling.     

A subquadratic triad census algorithm for large sparse networks with small maximum degree

In the paper a subquadratic (O(m), m is the number of arcs) triad census algorithm for large and sparse networks with small maximum degree is presented. The algorithm is implemented in the program Pajek.     

变周期信号的时域同步平均新算法

齿轮箱的转速受载荷和电压等的影响将会出现波动.无外时标采样时,用时域同步平均的传统算法处理转速波动的齿轮箱振动信号的降噪问题非常困难,提出变周期信号的时域同步平均新算法来解决这个问题.即利用转速波动的频域估计法确定同步平均的信号周期,再利用谱分析法计算数据长度,将变周期信号转换成周期信号进行时域同步平均.变周期信号时域同步平均新算法,不仅可省略外时标触发装置,而且可以改善由于转速波动引起的相位累积误差效应.模拟仿真和齿轮箱实验结果表明,该方法提高了信噪比,改善了相位累积误差.