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11.
长周期光纤光栅研究现状分析 总被引：1，自引：0，他引：1
饶云江 《电子科技大学学报(社会科学版)》2005,(Z1)
光纤光栅在光纤通信和光纤传感等领域有着广泛的应用,其中长周期光纤光栅是近年来光纤光栅研究领域的热点之一．该文在总结长周期光纤光栅研究现状的基础上,着重介绍了高频CO2激光脉冲写入长周期光纤光栅的新方法。 相似文献
12.
从"终身体育"视角谈高职体育素质教育 总被引：2，自引：0，他引：2
方舒君 《浙江海洋学院学报(人文科学版)》2002,19(3):90-93
高职学校体育是终身体育前期阶段的一种特殊形态。为此,要从体育改革基本理念的三个方面,即终身体育观、体育与健康素质教育观和育人为本的课程设计观出发,构建符合素质教育要求的高职体育课程及教材体系。 相似文献
13.
保持高校学生党员先进性长效机制建设的调研与思考 总被引：6，自引：0，他引：6
“新时期高校学生党员先进性教育工作体系及机制研究”课题组 《重庆交通学院学报(社会科学版)》2005,5(4):1-10
高校学生党员在保持党员先进性方面存在问题的主要原因,在于没有形成教育、管理、监督的长效机制。只有通过组织制度和投入的保障,实施学习教育、实践、监督及考评机制的创新,才能真正形成让学生党员长期受教育,永葆先进性的长效机制。 相似文献
14.
在以阅读为主的国内英语教学中,长期以来一直重视非常细节的句子语法分析,忽视了长句子的简化.如果阅读时能先撇开长句中的各种修饰语、插入语不管,把其中的从句看成一个个整体,那么复杂的长句就会变成简单的短句. 相似文献
15.
马成志 《盐城工学院学报(社会科学版)》2005,18(2):86-89
分析和评价了我国现代远程教育多媒体教学资源的现状和应用效果,针对多媒体教学资源中存在的问题,提出以学生为中心的理念,对多媒体教学资源进行开发设计;用开放性原则来进一步完善多媒体教学资源的建设;从最优化组合的要求对现有的多媒体教学资源进行整合。 相似文献
16.
吴晓军 《中北大学学报(社会科学版)》2001,(2):55-56
介绍了Internet与远程教育课程的关系,讨论了在计算机网络基础上页面的建立,包括网上教学系统和网上答疑。同时讨论了课件的开发和远程教育系统的应用,如教师备课和网上远程教育系统。 相似文献
17.
18.
Christiane Baumeister James D. Hamilton 《Econometrica : journal of the Econometric Society》2015,83(5):1963-1999
This paper makes the following original contributions to the literature. (i) We develop a simpler analytical characterization and numerical algorithm for Bayesian inference in structural vector autoregressions (VARs) that can be used for models that are overidentified, just‐identified, or underidentified. (ii) We analyze the asymptotic properties of Bayesian inference and show that in the underidentified case, the asymptotic posterior distribution of contemporaneous coefficients in an n‐variable VAR is confined to the set of values that orthogonalize the population variance–covariance matrix of ordinary least squares residuals, with the height of the posterior proportional to the height of the prior at any point within that set. For example, in a bivariate VAR for supply and demand identified solely by sign restrictions, if the population correlation between the VAR residuals is positive, then even if one has available an infinite sample of data, any inference about the demand elasticity is coming exclusively from the prior distribution. (iii) We provide analytical characterizations of the informative prior distributions for impulse‐response functions that are implicit in the traditional sign‐restriction approach to VARs, and we note, as a special case of result (ii), that the influence of these priors does not vanish asymptotically. (iv) We illustrate how Bayesian inference with informative priors can be both a strict generalization and an unambiguous improvement over frequentist inference in just‐identified models. (v) We propose that researchers need to explicitly acknowledge and defend the role of prior beliefs in influencing structural conclusions and we illustrate how this could be done using a simple model of the U.S. labor market. 相似文献
19.
Most of the long memory estimators for stationary fractionally integrated time series models are known to experience non‐negligible bias in small and finite samples. Simple moment estimators are also vulnerable to such bias, but can easily be corrected. In this article, the authors propose bias reduction methods for a lag‐one sample autocorrelation‐based moment estimator. In order to reduce the bias of the moment estimator, the authors explicitly obtain the exact bias of lag‐one sample autocorrelation up to the order n−1. An example where the exact first‐order bias can be noticeably more accurate than its asymptotic counterpart, even for large samples, is presented. The authors show via a simulation study that the proposed methods are promising and effective in reducing the bias of the moment estimator with minimal variance inflation. The proposed methods are applied to the northern hemisphere data. The Canadian Journal of Statistics 37: 476–493; 2009 © 2009 Statistical Society of Canada 相似文献
20.
Kyle Hyndman Santiago Kraiselburd Noel Watson 《Production and Operations Management》2014,23(2):221-238
In this article, we study behavior in a series of two‐player supply chain game experiments. Each player simultaneously chooses a capacity before demand is realized, and sales are given by the minimum of realized demand and chosen capacities. We focus on the differences in behavior under fixed pairs and random rematching. Intuition suggests that long‐run relations should lead to more profitable outcomes. However, our results go against this intuition. While subjects' capacity choices are better aligned (i.e., closer together) under fixed pairs, average profits are more variable. Moreover, learning is slower under fixed pairs—so much so that over the last five periods, average profits are actually higher under random rematching. The underlying cause for this finding appears to be a “first‐impressions” bias, present only under fixed matching, in which the greater the misalignment in initial choices, the lower are average profits. 相似文献