对我国数字电视发展现状及存在问题的思考

世界各国近年来都加快了广播影视数字化的步伐，我国的数字电视发展也有了实质性的进展，呈现出良好的发展态势，但在标准、技术、运营、经费等方面存在着一些不容忽视的问题。本文从国内数字电视发展的现状出发，针对这些问题提出了相应的对策和建议。     

模式识别和电视跟踪在前庭功能检查中的应用

应用模式识别和电视跟踪原理测量眼球在视靶信号刺激下的运动,为分析飞行员、车辆驾驶员的前庭功能提供一种先进的检查方法.采用均衡化、形态滤波和形心计算等方法实现了瞳孔区域的自动定位和实时跟踪;通过Harris角点检测和Lucas-Kanade光流跟踪实时测量出虹膜的旋转角度,为前庭功能分析奠定了良好的基础.通过实验验证,所介绍的眼球跟踪算法已达到了预期的效果,并已成功应用在前庭功能检查分析系统中.     

浅析数字信号处理对电子测量与仪器的影响

数字信号处理是当前使用电子仪器进行测量工作的重要组成组成部分。可以说,测量是人类社会发展过程中必不可少的一项工作,而电子仪器则是测量工作发展至今最为先进的设备。如何才能够通过数字信号处理加强电子测量仪器的使用效果成为了当前亟待解决的问题。本文便将对数字信号处理技术对电子测量与仪器的影响进行分析,并提出一些意见与建议。     

Sequence of the most informative joints (SMIJ): A new representation for human skeletal action recognition

Much of the existing work on action recognition combines simple features with complex classifiers or models to represent an action. Parameters of such models usually do not have any physical meaning nor do they provide any qualitative insight relating the action to the actual motion of the body or its parts. In this paper, we propose a new representation of human actions called sequence of the most informative joints (SMIJ), which is extremely easy to interpret. At each time instant, we automatically select a few skeletal joints that are deemed to be the most informative for performing the current action based on highly interpretable measures such as the mean or variance of joint angle trajectories. We then represent the action as a sequence of these most informative joints. Experiments on multiple databases show that the SMIJ representation is discriminative for human action recognition and performs better than several state-of-the-art algorithms.     

程控交换机房采用下送风空调的问题及应对措施

简介了程控交换机房对室内环境的要求，及应用下送风空调的主要优点，分析了它在使用不当时易出现的局部送风断面堵塞、气流短路、机柜和楼板结露、楼板的防火和保温处理及架空地板下局部区域积尘等问题，并给出了相应的应对措施。     

Digital inequalities and implications for social inequalities: A study of Internet penetration amongst university students in South Africa

International and national data sources confirm the limited access to the Internet in South Africa. However, there is a need to study how this limited access is distributed amongst population groups in the country. This study investigates the pattern of Internet access amongst university students in South Africa. University students are a relevant population group for studying technology penetration; this population is a generation born in the current era of digital revolution, they are presumably early adopters of technology and are adept in using them. A survey conducted in ten South African universities reveals that beyond publicly available access on campuses – with its attendant constraints, personal/household Internet access is a challenge and it reflects a pattern of inequalities in South Africa. Bearing in mind that social and economic exclusion is the biggest challenge for South Africa, this study reveals that digital inequalities amongst students replicate the pattern of social inequalities in the country. This exacerbates existing social inequalities, specifically amongst university students in South Africa, with certain categories of students being disproportionately disadvantaged.     

Social participation of the elderly in China: The roles of conventional media,digital access and social media engagement

China is the most rapidly aging country and has the largest aging population in the world. However, social participation is an important intervention to boost the active and healthy aging. The present study investigated the effects of media usage, together with social-demographics and health variables, on Chinese older adults. Drawing upon a national research project with a representative sample (N = 1,399) of older adults (55+) from 58 cities in China, the research findings revealed that conventional media, digital access and social media usage had positive effects on older adults’ informal social participation, while age moderated the relationship between informal social participation and digital access, particularly regarding access to tablet PCs and smartphones. Moreover, conventional media, digital access and social media engagement largely explained seniors’ formal social participation regardless of their social-demographic backgrounds. Finally, the roles of conventional media and digital media in older adults’ social participation are discussed.     

关于互联网科普的若干问题——以中国数字科技馆一期工程为例

结合中国数字科技馆一期工程建设的实践,提出了关于互联网科普的界定、互联网科普的特性与特点、互联网科普的进展和目前存在的一些共性的问题,提出在互联网科普的建设中应该参照国家有关出版法律法规加强质量控制。注意加强原创性和信息更新,加强著作权保护意识,加强技术创新等观点。     

中央节目无线数字化覆盖工程规划试算电波传播模型研究

本文简要介绍了三种常用的电波传播模型,包括ITU-R P.1546、ITU-R P.526和Okumura-Hata,提出了一种用于对中央工程广播电视发射台站的场强覆盖进行仿真试算时使用的电波传播模型的方法,给出了模型确定的总体思路,并以广东省阳江市望瞭岭为典型案例,按照“三步走”原则,采用理论推导结合现场实测的方法,详细介绍了确定电波传播模型的过程,并给出结论。     

Robot and its living space: A roadmap for robot development based on the view of living space

Robots, as the creation of humans, became an irreplaceable component in human society. With the advancement of technologies, robots have become more and more intelligent and have been widely used in many fields, such as disease diagnosis, customer services, healthcare for the older people, and so on. As robots made our lives much more convenient than ever before, they also brought many potential risks and challenges in technology, security, and ethic. To better understand the development of robots, we proposed a concept of a robot’s living space and analyzed the role of robots in our society. In this paper, we focus on setting a theoretical framework of the robot’s living space to further understand the human-robot relationship. The research in this paper contains three central aspects. First, we interpret the concept of the robot’s living space and the functions of each space. Second, we analyze and summarize the relative technologies which support robots living well in each space. Finally, we provide advice and improvement measures based on a discussion of potential problems caused by the developments of robots. With the trend of robots humanization and human-robot society integration, we should seriously consider how to collaborate with intelligent robots to achieve hybrid intelligence. To build a harmonious human-robot integrated society, studying the robot’s living space and its relationship with humans is the pre-requisite and roadmap.     

C-HEAP: A Heterogeneous Multi-Processor Architecture Template and Scalable and Flexible Protocol for the Design of Embedded Signal Processing Systems

The key issue in the design of Systems-on-a-Chip (SoC) is to trade-off efficiency against flexibility, and time to market versus cost. Current deep submicron processing technologiesenable integration of multiple software programmable processors (e.g., CPUs,DSPs) and dedicated hardware components into a single cost-efficient IC. Ourtop-down design methodology with various abstraction levels helps designingthese ICs in a reasonable amount of time. This methodology starts with a high-levelexecutable specification, and converges towards a silicon implementation.A major task in the design process is to ensure that all components (hardwareand software) communicate with each other correctly. In this article, we tacklethis problem in the context of the signal processing domain in two ways: wepropose a modular, flexible, and scalable heterogeneous multi-processor architecturetemplate based on distributed shared memory, and we present an efficient andtransparent protocol for communication and (re)configuration. The protocolimplementations have been incorporated in libraries, which allows quick traversalof the various abstraction levels, so enabling incremental design. The designdecisions to be taken at each abstraction level are evaluated by means of(co-)simulation. Prototyping is used too, to verify the system's functionalcorrectness. The effectiveness of our approach is illustrated by a designcase of a multi-standard video and image codec.He currently works with Magma Design Automation. E-mail: