Modeling and stabilization of a wireless network control system with packet loss and time delay

The problem of modeling and stabilization of a wireless network control system (NCS) is considered in this paper, where packet loss and time delay exist simultaneously in the wireless network. A discrete-time switched system with time-varying delay model is first proposed to describe the system closed by a static state feedback controller. A sufficient criteria for the discrete-time switched system with time-varying delay to be stable is proposed, based on which, the corresponding state feedback controller is obtained by solving a set of linear matrix inequalities (LMIs). Numerical examples show the effectiveness of the proposed method.     

以重大成果产出为导向改革科技评价

7月6日,全国科技创新大会在京召开,就贯彻落实党中央国务院《关于深化科技体制改革、加快国家创新体系建设的意见》做出全面部署,明确了科技体制改革的目标、重点和任务,并提出开展重大成果产出导向的科技评价试点。中科院根据"创新2020"的战略目标和任务,提出改革科技评价,建立重大成果产出导向的评价体系。本文阐述了以重大成果产出为导向改革科技评价的重要意义、重大成果产出的科学内涵,介绍了中科院重大成果产出导向的研究所评价体系。反映中科院作为科技国家队,在科技体制改革中发挥先行探索作用。     

高职英语教学资源库建设初探

本文分析了升格不久的高职院校英语教学现状并对同类院校的英语教学模式进行了调研。提出了在改进教师教学方法的基础上利用校园网建设适合本校英语教学的资源库,并详细介绍了英语教学资源库建设的理论依据、特点、主体框架及注意事项。建成后的英语教学资源库将对改进本校英语教学模式起到积极的推进作用。     

我国战略性新兴产业发展如何避免低端锁定——以风电设备制造业为例

近年来我国的风力发电等战略性新兴产业取得了快速发展,但由于内源性技术创新能力不足、技术高度战略化与产品低市场利基的矛盾等原因,使得战略性新兴产业发展面临低端锁定的风险。本文以风电设备制造业为例,通过分析全球的竞争格局以及我国以引进技术支撑规模制造优势、通用零部件的生产优势与关键零部件的进口依赖并存等参与全球价值链的特征,得出距离战略性新兴产业的标准仍有不小差距。为避免低端锁定,本文提出关键共性技术的战略性攻关、赋予龙头企业创新责任与创新激励等六条风电设备制造业实现价值链攀升的路径。     

网络学习管理系统的设计与开发

为了使普通教师只要会文字编辑就能够制作出交互性良好的网络课程,在教学设计思想的指导下设计开发网络学习管理系统,系统采用J2EE技术架构,Java语言开发。实践证明,应用网络学习管理系统可以方便制作网络课程,并对学生的学习进行有效的管理。     

结合思维导图的师范生现代教育技术公共课程教学实践初探

师范生现代教育技术公共课程,是培养未来教师掌握现代化的教育技术技能的一门重要课程,然而由于各种原因,实际教学中存在许多问题。如何利用思维导图的优势,将思维导图与师范生现代教育技术公共课程教学实践相结合是本文探讨的一个问题。     

农村职业教育：面临的挑战与发展趋势和优先事项

提高农民的素质和帮助农民增加收入是新农村建设背景下农村职业教育面临的一项严峻的挑战。把培养新型农民放在首位,加大农民培训,提高培训水平是今后农村职业教育发展的趋势。在发展农村职业教育的时候应优先考虑农业、农村、农民的基本需要,同时必须在现有的基础上进行改革、创新。     

《大戴礼·夏小正》所用历法考证

<大戴礼·夏小正>所用历法,迄今主要有"十月太阳历"、"殷历"和"夏历"等三种观点.比较<夏小正>与<礼记·月令>,它们记载的物候相一致的情况居多;测算星宿的距度.可推知<夏小正>与<月令>记载的正月、三月、五月、六月和八月的星象皆一致.可见,<夏小正>与<月令>使用的历法大体相同.另,<月令>与<淮南子·时则训>记载的星象亦一致,且<淮南子·时则训>中斗建寅这一星象为夏历的主要标志,可见<月令>使用的是夏历,而<夏小正>所用历法亦以夏历为主.     

Quantitative evaluation of air pollution in transport strategic environmental assessment: a case study based on uncertainty analysis and graphic information system technology

Although the impact of road transport on urban air quality has achieved a high profile in China, still greater attention is required as it has not yet been considered fully even in relation to the road network linking cities and urban areas. Strategic environmental assessment （SEA） is a systematic and comprehensive process for evaluating the environmental impacts of a policy, plan or program in publicly accountable decision-making. Air pollution has been recognized as a significant issue in most transport SEA practices. The Strategic Environmental Assessment of the Hubei Road Network Plan （2002-2020） （HRNP） was introduced as one of the World Bank＇s pilot SEA projects. An effective framework was developed to investigate the functional relationship between the road network and its potential air pollutant emissions. In this study, two indicators were identified： emission intensity/ inventory of pollutants and the spatial distribution of the most polluted areas. Because strategic actions are inherently nebulous and data quality is often disappointing, three alternative scenarios were employed to address uncertainties and data/scale issues. Calculations were made using emission models and results were analyzed with the help of statistical tools and the geographic information system （GIS）. The results from the project implementation and the feedback from the World Bank have both shown that the proposed framework is effective in the transport SEA process.     

试论远程教育网络考试系统的数据库开发

在研究远程教育教学和管理各环节发展不均衡现状的基础上。从数据库技术角度提出设计开发网络考试系统的思路并就部分关键环节的具体步骤进行了深入探索。