纱线扭结行为的新测试方法

新研发的ITV纱线扭结测试仪的问世,第一次使批量测试成为可能,还使对纱线扭结行为的测试结果具有了统计学上的重要意义。该仪器除能对纱线扭结行为进行测试外,还能分析不同纱线参数对纱线扭结的影响。此外,判断蒸汽定型对纱线扭结行为的影响是一项重要的研究内容,因为其直接与节能降耗有关。     

Self-X Materials and Structures in Nature and Technology: Bio-inspiration as a Driving Force for Technical Innovation

Over the course of 3.8 billion years of biological evolution, nature has found the answers to many engineering problems. The aim of biomimetics is to analyse and tap biology's potential as a huge reservoir for innovative solutions. Thomas Speck , Professor and Director of the Plant Biomechanics Group (PBG) at the University of Freiburg and the Freiburg Centre for Interactive Materials and Bioinspired Technologies (FIT), Jan Knippers , Professor and Head of the Institute of Building Structures and Structural Design (ITKE) at the University of Stuttgart, and Olga Speck , a researcher at the PBG, scientific coordinator of FIT and manager of the Competence Network Biomimetics at Freiburg, explain how biological material systems with self-x properties are cost-efficient, multifunctional, and can be environmentally friendly; and with several billion trial runs, have surely stood the test of time.     

ITV内容分发网络关键技术的研究与实现

ITV是区别与传统广播电视的新型电视媒体。文章源于从事新媒体ITV业务研发的实践经验,分析内容分发网络在ITV系统中的重要作用,研究ITV系统内容分发网络所涉及的几项关键技术,设计出可作用于现实ITV系统的内容分发存储网络体系,内容存储技术,内容分发技术,负载均衡技术,以及链路路由规划方法,并总结出ITV实践中所遇到的问题及解决办法,为后续相关产品的开发和服务提供了有益参考。     

The Development of Early Computer-Assisted Writing Instruction (1960–1978): The Double Logic of Media and Tools

This essay traces a distinction between computer-mediated writing environments that are tools for correcting student prose and those that are media for communication. This distinction has its roots in the influence of behavioral science on teaching machines and computer-aided writing instruction during the 1960s and 1970s. By looking at the development of the time-shared, interactive, computer-controlled, information television (TICCIT) and early human–computer interaction (HCI) research, this essay demonstrates that hardware and software systems had the potential to work as both tools and media. The influence of this double logic is not only historical but also has implications for post-secondary writing instruction in the age of Microsoft Word, ETS's e-rater, and the reading/assessment software tools being developed by Knowledge Analysis Technologies (KAT). This essay challenges composition researchers and computational linguists to develop pedagogies and software systems that acknowledge writing environments as situated within the logic of both tools for correction and media for communication.     

Kinetic study on ethanol production using Saccharomyces cerevisiae ITV‐01 yeast isolated from sugar cane molasses

BACKGROUND: Bio‐ethanol production from renewable sources, such as sugar cane, makes it a biofuel that is both renewable and environmentally friendly. One of the strategies to reduce production costs and to make ethanol fuel economically competitive with fossil fuels could be the use of wild yeast with osmotolerance, ethanol resistance and low nutritional requirements. The aim of this work was to investigate the kinetics of ethanol fermentation using Saccharomyces cerevisiae ITV‐01 yeast strain in a batch system at different glucose and ethanol concentrations, pH values and temperature in order to determine the optimum fermentation conditions. RESULTS: This strain showed osmotolerance (its specific growth rate (µ_max) remained unchanged at glucose concentrations between 100 and 200 g L^?1) as well as ethanol resistance (it was able to grow at 10% v/v ethanol). Activation energy (Ea) and Q₁₀ values calculated at temperatures between 27 and 39 °C, pH 3.5, was 15.6 kcal mol^?1 (with a pre‐exponential factor of 3.8 × 10¹² h^?1 (R² = 0.94)) and 3.93 respectively, indicating that this system is biologically limited. CONCLUSIONS: The optimal conditions for ethanol production were pH 3.5, 30 °C and initial glucose concentration 150 g L^?1. In this case, a maximum ethanol concentration of 58.4 g L^?1, ethanol productivity of 1.8 g L^?1 h^?1 and ethanol yield of 0.41 g g^?1 were obtained. Copyright © 2010 Society of Chemical Industry     

利用现有频道开展互动点播业务

介绍了利用现有频道开展增值业务在县级台取得的成功经验,重点介绍了点播业务开展的详细过程和取得的经验.     

交互式电视技术及其应用

主要对交互式电视技术的基本概念、系统结构、主要功能、工作原理、关键技术等进行叙述,同时介绍了交互式电视技术的应用情况.     

MHP发展概况

介绍了多媒体家用平台(MHP)在一些国家和地区的应用情况,及其在各消费类电子厂商的实现情况,以及世界中间件技术标准的发展状况.     

城域网组播复制点位置设定分析

随着ITV业务的快速发展,城域网上单台BRAS设备承载的ITV用户数量将越来越多,BRAS下行的单播流量将极大地占用接入网带宽。组播复制点是否需要从现有的BRAS上下移到接入网设备,下移的效果如何,何时下移合适,本文针对这些问题对两种组播复制点位置设定方案进行了分析,预测和检验了下移后的效果,提出了下移的业务场景。     

保护ITV机顶盒和便携设备的高速口

描述了保护ITV机顶盒和便携设备高速口的电路.