供应链柔性组件及特性     

肖久灵  汪建康 《上海海事大学学报》2006,(Z1)

从运营系统、物流过程、供应网络、组织设计和信息系统等5个方面分析供应链柔性组件及其特性,以此促进企业改善顾客满意程度和提升供应链价值．  相似文献   

Implementing Problem-Based Learning in Principal Training： The First Pilot Program in China     

Daming Feng 《美中教育评论》2005,2(3):13-19,12

In designing and implementing the pilot program of serving principal training, the author of this paper learnet the experience from what E. Bridges and E Hallinger did but didn＇t imitate fully, rather, created several new strategies because Chinese principals faced different situation from their American counterparts. The pilot program introduced and implemented the Problem-Based Learning （PBL） approach. The outcome of this pilot program shows： （1） PBL is a promising approach to serving principal training in China in casting off the traditional ＂chalk and talk＂ lecture approach. （2） The actual learning of trainees will happen prior to the classroom sessions if a trainer lets trainees participate the process of problem identification in pre-training stage. （3） PBL approach is much welcome and strong supported by local government and policymakers when the focal problem is related to implementation of current local nolicv.  相似文献   

对西部大开发中体育产业化基本问题的再认识   总被引：3，自引：1，他引：2  

黄晓华  许惠玲 《体育学刊》2002,9(4):17-19

体育在西部大开发中有着特定的任务和作用。体育产业化是市场经济条件下西部大开发中体育发展的必由之路。市场经济体制下西部大开发的本质是推进经济发展的市场化，而体育产业化可以促进体育增长方式的转变，提高体育的整体效益，进一步优化体育的经济结构和促进体育市场经济体制的建立。体育产业化的实质在于发展体育市场经济，构成新的体育产业体系。体育产业具有其基本特征。  相似文献   

影响篮球比赛快攻战术成功率主要因素分析   总被引：26，自引：0，他引：26  

盖建武 《中国体育科技》2003,39(4):41-44

通过对全国高等体育院校、高等师范院校和体育科研单位的 2 9名篮球专家进行问卷调查 ,经统计学处理 ,得出了影响篮球快攻战术成功率的主要因素及其所包含的子因素 ,找出了影响快攻战术成功率的各主要因素的重要程度 ,为篮球运动战术的理论和训练提供依据。  相似文献   

短跑教学中如何发挥教师的主导性和学生的主体性     

杨学军  李兴锱  司虎克  黄顺章  王兴 《上海体育学院学报》1993,(4)

采用调查与实验对比的方法,论述了短跑教学中有利于发挥教师的主导性和学生的主体性的几个操作步骤。  相似文献   

发挥主体作用提高课堂效率     

张文华 《南京体育学院学报(社会科学版)》2003,17(6):161-162

倡导学生主体,加强自主性教学,提高课堂效率,正是当前教学改革的主旋律,我们正是抓住这一场教改的契机,在体育教学上研究如何发挥学生的主体作用,运用选修课的形式,引导学生主动学习,主动锻炼,既学到了运动技能,增强了体质,又促进了他们逐渐形成了高尚的趣味和健康的人格。  相似文献   

Hierarchical clustering of a Finnish newspaper article collection with graded relevance assessments     

Tuomo Korenius  Jorma Laurikkala  Martti Juhola  Kalervo Järvelin 《Information Retrieval》2006,9(1):33-53

Search facilitated with agglomerative hierarchical clustering methods was studied in a collection of Finnish newspaper articles (N = 53,893). To allow quick experiments, clustering was applied to a sample (N = 5,000) that was reduced with principal components analysis. The dendrograms were heuristically cut to find an optimal partition, whose clusters were compared with each of the 30 queries to retrieve the best-matching cluster. The four-level relevance assessment was collapsed into a binary one by (A) considering all the relevant and (B) only the highly relevant documents relevant, respectively. Single linkage (SL) was the worst method. It created many tiny clusters, and, consequently, searches enabled with it had high precision and low recall. The complete linkage (CL), average linkage (AL), and Ward's methods (WM) returned reasonably-sized clusters typically of 18–32 documents. Their recall (A: 27–52%, B: 50–82%) and precision (A: 83–90%, B: 18–21%) was higher than and comparable to those of the SL clusters, respectively. The AL and WM clustering had 1–8% better effectiveness than nearest neighbor searching (NN), and SL and CL were 1–9% less efficient that NN. However, the differences were statistically insignificant. When evaluated with the liberal assessment A, the results suggest that the AL and WM clustering offer better retrieval ability than NN. Assessment B renders the AL and WM clustering better than NN, when recall is considered more important than precision. The results imply that collections in the highly inflectional and agglutinative languages, such as Finnish, may be clustered as the collections in English, provided that documents are appropriately preprocessed.  相似文献   

Writer identification approach based on bag of words with OBI features     

Amal Durou  Ibrahim Aref  Somaya Al-Maadeed  Ahmed Bouridane  Elhadj Benkhelifa 《Information processing & management》2019,56(2):354-366

Handwriter identification aims to simplify the task of forensic experts by providing them with semi-automated tools in order to enable them to narrow down the search to determine the final identification of an unknown handwritten sample. An identification algorithm aims to produce a list of predicted writers of the unknown handwritten sample ranked in terms of confidence measure metrics for use by the forensic expert will make the final decision.Most existing handwriter identification systems use either statistical or model-based approaches. To further improve the performances this paper proposes to deploy a combination of both approaches using Oriented Basic Image features and the concept of graphemes codebook. To reduce the resulting high dimensionality of the feature vector a Kernel Principal Component Analysis has been used. To gauge the effectiveness of the proposed method a performance analysis, using IAM dataset for English handwriting and ICFHR 2012 dataset for Arabic handwriting, has been carried out. The results obtained achieved an accuracy of 96% thus demonstrating its superiority when compared against similar techniques.  相似文献   

Components of Variance of Scales With a Bifactor Subscale Structure From Two Calculations of α     

David Andrich 《Educational Measurement》2016,35(4):25-30

Since Cronbach's (1951) elaboration of α from its introduction by Guttman (1945), this coefficient has become ubiquitous in characterizing assessment instruments in education, psychology, and other social sciences. Also ubiquitous are caveats on the calculation and interpretation of this coefficient. This article summarizes a recent contribution (Andrich, 2015) on the use of coefficient α which complements these many caveats. It shows that in the presence of a simple bifactor structure of a scale where unique components of variance are homogeneous in magnitude, three components of variance and the common latent common correlation among the subscales can be calculated from the ratio of two calculations of α, one at the level of the items, the other at the level of the subscales. It was suggested that these two ready calculations and their interpretation, and the reporting of all four indices in the analysis of scales with a subscale structure, would reduce the misinterpretation of this coefficient. An illustrative example of the application of the calculations is also shown.  相似文献   

论翻译能力的构成因素     

戴忠信  刘军 《金陵科技学院学报(社会科学版)》2005,19(2):78-82

本从个体翻译过程的角度分析了个体翻译能力的构成因素，其目的是为翻译教学提供必要的理论依据。个体的翻译能力主要由翻译才能、翻译语能、翻译熟能和翻译智能四个方面的能力构成。翻译才能指处理语言所表达的意义的能力；翻译语能指处理语言外在形式的能力；翻译熟能与翻译过程的自动化速度有关，而翻译智能则与理解交际意图和逻辑推理能力有关。  相似文献