有线电视分配系统设计中的算法

本文介绍了一种在有线电视分配系统设计过程中的简单算法。并通过一个实际例子说明该算法的优势。     

当代西方公共广播电视体制的基本类型

当代西方诸国公共广播电视经营机构一方面依法独立运行 ,普遍地具有一系列共同的基本特征 ;另一方面由于同社会众基本政治力量结成不同的政治调控关系 ,而形成彼此相异的体制类型 ,主要有国有公营型、国有国会主导型、社会联合公营型和国有政府主导型等。     

西方公共电视的节目评估:收视率悖论

在经营和编辑上试图独立于政府控制和商业影响的西方公共电视系统在评估节目时面临着使命与效率的冲突。收视率依然是公共电视系统在判定理想节目时的关键指标 ,但是并不是唯一的“指南针” ,各公共电视系统往往是综合使用收视率和收视质的表现评估节目价值。     

Nurturing Authority

When considering the role of local journalism in a networked media environment, it is crucial to examine how audiences attribute news with the power to define social knowledge. In particular, television news programs need to appeal to audiences by reinforcing a sense of local journalistic authority to assert the parameters of who and what is worthy of coverage. This article presents the findings from interviews with a range of commercial television news viewers in Sydney, Australia. It positions viewership in the context of people’s wider engagement with news, and in relation to their interpersonal and digital social interactions. The paper argues that local audiences have conflicting attitudes to the role of television news, both contesting and re-inscribing the programs with the power to demarcate social, political, and cultural knowledge. It traces how local audiences challenge the ability of news to convey boundaries within the community through processes of exclusion, connecting the contestations to the lived experiences of the individuals. It identifies that television news programs nurture journalistic authority in terms of their local relevance, and it contributes insights on the significance of local news by engaging with the means by which audiences themselves attach social power to journalism.     

方言电视新闻的发展瓶颈与对策

当前我国方言电视新闻遭遇三大瓶颈，即国家法律法规带来的政策瓶颈、语言障碍引起的传播瓶颈和新闻内容选择上的品质瓶颈。方言电视新闻节目要突破各类瓶颈制约，应加强对自身节目形态的历史地位的认识，在抓住本地老居民的同时，也尽可能多地争取外来新居民，还要牢牢树立“内容为王”的理念，在内容上做好文章。     

在素质教育背景下构建电大教育评价

实施素质教育应确立科学的评价机制。当前,电大教育评价必须摆脱传统应试教育观念的影响和制约,通过全面发展教育,实现教育评价观念的转变,才能阐述教育评价的科学性。     

影视屏幕用字亟待规范——从电视连续剧《铁齿铜牙纪晓岚》说起

影视作品在文字的运用方面存在着亟待解决的严重问题,应该引起语文工作者和社会各界的高度重视。     

用保角变换法计算单芯偏心电缆单位长度的自感

文章利用分式线性变换计算单芯偏心电缆单位长度的自感,并对结果进行讨论。     

Modelling of URM Walls Retrofitted with Cable：A Comparison Between a Basic Mechanical Model and Distinct Element Method

The Australian love of ＂heritage＂ buildings （most of them are unreinforced masonry （URM） ） means that greater attention is required to secure their performance under seismic or impact loading in the future. A research project has been carried out to develop a new, economic and high strength retrofitting technique for masonry structures. A series of experimental testing on URM walls retrofitted with an innovative technique by cable system have been conducted. In this paper, an analytical model which is based on distinct element method（DEM） is developed to simulate the behaviour of retrofitted walls, in DEM, a solid is represented as an assembly of discrete blocks. Joints are modelled as interface between distinct bodies. It is a dynamic process and specially designed to model the behaviour of discontinuities. In order to assist the practising engineers to design this new retrofitted wall system, a simple mechanical model was also developed to predict the strength of the retrofitted walls. The results obtained from this simple mechanical model are compared with those from both experiments and distinct element model.     

剖析双绞线标准

本文从双绞线的工作原理出发，介绍了基于RJ-45的直通线和交叉线的制作标准及其与各种设备的连接方法。剖析双绞线标准，以利于掌握规律，并正确使用标准，以保证网络的正常运行，最终推进网络技术的发展。