民族教育教材出版发行现状及其发展策略     

白立元 《民族教育研究》2007,18(3):113-116

改革开放以来,我国民族教育教材出版规模逐步扩大,但随着新技术的不断发展与我国加入WTO后出版市场的逐步放开,民族教育教材出版发行面临着新的挑战.在这种背景下,需要切实加强对民族教育教材出版发行现状、存在问题、出版发行的立体化开发和品牌策略进行研究与探讨.  相似文献   

Parameter estimation of an unstable system with a PID controller in a closed loop configuration     

E. Cheres 《Journal of The Franklin Institute》2006,343(2):204-209

An essential part of the auto-tuning control involves parameter estimation of a suitable low order model. Since a common way to control an unstable system is via a PID controller, there is a growing interest in the application of new PID-based algorithms for the identification task. In this light the relative advantages of two recently published methods are investigated. The first method is based on typical data of the reaction curve and the time delay is measured directly from the initial portion of the curve. The second method utilizes a least-squares algorithm to get an equivalent time delay together with the values of the other parameters. Thus, the obtained time delay approximates not only the true delay but also part of the nonlinear and the higher order dynamics. This is an advantage when a PID auto-tuning is sought. Two examples are provided to demonstrate and compare between the results of the methods.  相似文献   

提高科技期刊影响因子的途径探讨   总被引：19，自引：2，他引：17  

柳晓丽 《编辑学报》2006,18(4):285-286

分析科技期刊影响因子的主要影响因素,探讨提高科技期刊影响因子的途径.  相似文献   

Academic personality and the commodification of academic texts     

Andrew Alexandra 《Ethics and Information Technology》2002,4(4):279-286

This paper explores the nature of, and justification for, copyright in academic texts in the light of recent developments in information technology, in particular the growth of electronic publication on the internet. Copyright, like other forms of property, is best thought of as a cluster of rights. A distinction is drawn within this cluster between first order `control rights' and higher order `commodity rights'. It is argued that copyright in academic texts is founded on its role as a means to allow academics to fulfil their role responsibilities. While the possession and exercise by academics of commodity rights can be thus justified in the case of mechanical print-based publication, since this helps make possible the reproduction and dissemination of academic texts, they cannot be so justified in the case of electronic publication. There are nevertheless good reasons to retain various control rights.  相似文献   

检索刊物的发展模式与优化选择策略   总被引：4，自引：0，他引：4  

刘家新  王娟萍 《情报科学》2001,19(3):264-266

本文详细地论述了不同媒体检索刊物的性能及发展模式，探讨了订购不同媒体检索刊物的选择方式。  相似文献   

基于RTL行为模型的测试产生及时延测试方法(英)     

李华伟  李忠诚 《中国科学院研究生院学报》2002,(2)

寄存器传输级(RTL)测试产生及时延测试是当今集成电路(IC)测试技术中亟待解决的问题和研究的热点.首先从IC逻辑测试的测试产生和IC时延测试方法这两个方面系统地综述了测试产生和时延测试领域迄今为止的主要研究成果.在RTL行为描述的测试产生方面,提出了新的RTL行为模型的描述方法:行为阶段聚类描述,并提出了基于聚类的测试产生技术.将这些技术集成到RTL级ATPG系统ATCLUB中,在提高测试产生效率及缩短测试长度方面效果显著.在IC时延测试方面,提出了一种新的可变双观测点的时延测试方法。基于该方法提出了新的时延故障诊断方法,实现和完善了可变双观测点的时延测试系统DTwDO.DTwDO提供了从时延测试到故障诊断等一系列测试工具,有效减少了测试通路数,提高了故障覆盖率,并有很高的故障定位成功率.  相似文献   

On robust stabilization of uncertain stochastic time-delay systems—an LMI-based approach     

Chien-Yu Lu  Te-Jen Su 《Journal of The Franklin Institute》2005,342(5):473-487

In this paper, we first deal with the robust stability of uncertain linear stochastic differential delay systems. The parameter uncertainties are time-varying and unknown but are norm-bounded via two types of uncertainties, and the delays are time invariant. We then extend the proposed theory to discuss the robust stabilization of uncertain stochastic differential delay systems. These results are given in terms of linear matrix inequalities. Two examples are presented to illustrate the effectiveness.  相似文献   

优先数字出版:学术期刊发展的新动力     

谢辉 《郧阳师范高等专科学校学报》2011,31(1):92-94

优先数字出版是学术期刊发展的新动力,它可以缩短学术期刊的出版时滞,尽早确认科研成果的首发权,可推动学术期刊编排的标准化与规范化,提高学术期刊编辑的电子化办公水平并且进一步增强学术期刊的影响力.  相似文献   

现代出版与文化品位--《文化关怀中的现代出版》读后     

黄弗同 《广播电视大学学报》2006,(2):123-124

出版界的许多问题需要从文化的角度加以解决。《文化关怀中的现代出版》以文化为全书的脉络,探讨出版的诸多方面,思理有据,多有创获,特别是对出版物文化品位的强调,既有现实意义,又有学术价值。  相似文献   

辽金时期西京的出版业     

杜成辉 《雁北师范学院学报》2001,17(3):1-4

辽金时期的西京大同，是我国北方的政治，经济和化中心之一，化教育十分发达，在科学技术方面也颇有建树，其出版业居于全国前列，为后人留下了珍贵的化艺术遗产。  相似文献