Matlab求解一维半边无限高方势阱     

李柏林 《黄冈师范学院学报》2009,29(3):33-36

使用Matlab软件求解量子力学中的一维半边无限高方势阱问题．首先,利用Matlab软件探讨求解此问题中的超越方程组的数值方法,得到相应的能级表达式;继而,求出一组具体的波函数和概率密度函数并给出概率密度函数的图示;最后,对不同概率密度分布情况的物理意义进行了简要的说明．  相似文献   

Blending Reflection and Benchmarks: Development of a Comprehensive Assessment Model for Social Work Education          下载免费PDF全文

Scott J. Berlin  Gwendolyn J. Adam  Patricia Stow Bolea  Joan M. Borst 《Assessment Update》2015,27(6):1-16

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The Insecure/Ambivalent Pattern of Attachment: Theory and Research   总被引：5，自引：0，他引：5  

Jude Cassidy  Lisa J. Berlin 《Child development》1994,65(4):971-991

Relatively little has been written about one group of infants identified with Ainsworth's "Strange Situation" assessment of infant-parent attachment, those classified insecure/ambivalent. Although virtually all samples contain some insecure/ambivalent infants, these infants are uncommon, comprising 7%–15% of most American samples. Recently developed assessments of attachment in children and adults have identified attachment groups of older individuals thought to parallel the insecure/ambivalent infant group. Empirical work in which insecure/ambivalent individuals are examined as a separate group is reviewed within the context of attachment theory, and a coherent picture emerges of the antecedents (relatively low or inconsistent maternal availability; biological vulnerability) and sequelae (limited exploratory competence) of this group. This picture is used as the basis for additional theoretical proposals, and suggestions for future research are presented.  相似文献   

Decision making: Influence of features and presentation mode upon generation of alternatives     

Phillip A. Heath  Arthur L. White  Donna F. Berlin  John C. Park 《科学教学研究杂志》1987,24(9):821-833

Decision making can be defined as the process of making reasoned choices among alternatives based upon judgments consistent with the values of the decision maker. Models describing decision making generally include: identification of the problem, collection of relevant information, generation of alternatives, identification of consequences of alternatives, and selection of alternatives. This research focuses on the ability of children to generate alternatives in decision-making tasks. The problem was to determine the differential effects of the number of features of a decision-making situation in interview and computer-simulation modes on the number of alternatives children generate. The study involved 208 children with equal numbers of 2nd and 4th grade boys and girls. Each child responded to three decision-making situations either in an interview or computer-simulation mode. The three situations varied on the number of features of the award objects. An increase in the number of features (color) of the award objects (jelly beans) in a decision-making situation increased the number of alternatives generated. The children in this study generated more alternatives in the interview setting than with the computer simulation.  相似文献   

Using technology in assessing integrated science and mathematics learning     

Donna F. Berlin  Arthur L. White 《Journal of Science Education and Technology》1995,4(1):47-56

Drawing from current models, research, and science and mathematics education reform documents, this article first defines and/or delimits three broad domains of education: integrated school science and mathematics, assessment, and technology. Based upon this three-tiered discussion, a list of characteristics is then distilled to guide in the development of assessment for integrated school science and mathematics using technology. Two integrated school science and mathematics activities are provided to illustrate the alignment of instruction and assessment and the systematic integration of technology into both.The writing of this paper was supported by The National Center for Science Teaching and Learning under grant R117Q00062 from the Office of Educational Research and Improvement, U.S. Department of Education. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the sponsoring agency.  相似文献   

A logical analysis of faculty collective bargaining     

Loren Jung  Richard Liu 《Research in higher education》1982,17(2):115-124

This paper proposes a model for the verbal theory of collective bargaining. Four variables are used: trust, salary, inclination for collective bargaining, and general professional market. Postulates from the model and strategies for estimating its parameters are also discussed.  相似文献   

The president's page     

Loren Reid 《Quarterly Journal of Speech》2013,99(2)

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Lung Volumes and Maximal Respiratory Pressures in Collegiate Swimmers and Runners     

Loren Cordain  Alan Tucker  Debbie Moon  Joel M. Stager 《Research quarterly for exercise and sport》2013,84(1):70-74

Abstract

To determine whether respiratory muscle strength is related to pulmonary volume differences in athletes and nonathletes, 11 intercollegiate female swimmers, 11 female cross-country runners, and two nonathletic control groups, matched to the athletes in height and age, were evaluated for pulmonary parameters including maximal inspiratory pressure (P_lmax) and maximal expiratory pressure (P_Emax). Swimmers exhibited larger (p < .05) vital capacities (VC), residual lung volumes (RV), inspiratory capacities (IC), and functional residual capacities (FRC) than both the runners or the controls but no difference (p > .05) in either P_lmax or inspiratory flow (FIV_25%-75%). Timed expiratory volumes (FEV Q.5 m and FEV_1.0 were significantly (p < .05) lower in the swimmers than in the controls. These data suggest that an adaptational growth may be responsible, in part, for the augmented static lung volumes demonstrated in swimmers  相似文献   

Extractive speech summarization using evaluation metric-related training criteria     

Berlin Chen  Shih-Hsiang LinYu-Mei Chang  Jia-Wen Liu 《Information processing & management》2013

The purpose of extractive speech summarization is to automatically select a number of indicative sentences or paragraphs (or audio segments) from the original spoken document according to a target summarization ratio and then concatenate them to form a concise summary. Much work on extractive summarization has been initiated for developing machine-learning approaches that usually cast important sentence selection as a two-class classification problem and have been applied with some success to a number of speech summarization tasks. However, the imbalanced-data problem sometimes results in a trained speech summarizer with unsatisfactory performance. Furthermore, training the summarizer by improving the associated classification accuracy does not always lead to better summarization evaluation performance. In view of such phenomena, we present in this paper an empirical investigation of the merits of two schools of training criteria to alleviate the negative effects caused by the aforementioned problems, as well as to boost the summarization performance. One is to learn the classification capability of a summarizer on the basis of the pair-wise ordering information of sentences in a training document according to a degree of importance. The other is to train the summarizer by directly maximizing the associated evaluation score or optimizing an objective that is linked to the ultimate evaluation. Experimental results on the broadcast news summarization task suggest that these training criteria can give substantial improvements over a few existing summarization methods.  相似文献   

泛在移动环境下学生对移动学习项目的反馈     

方柏林 《开放教育研究》2009,15(4):62-68

本文总结了俄克拉荷马基督教大学移动学习项目试点一学期后学生的反馈问卷.该学校在美国是最早给学生配发笔记本电脑和智能手机或iPod Touch双重移动设备的学校之一,全校覆盖无线网络.该问卷调查试图了解在如此泛在的网络使用环境下,学生使用移动学习工具和环境的使用习惯及期待.问卷结果显示:整体来说,学生认为这种泛在学习环境对其学习有利;学生使用移动设备主要用于辅助学习、效率改进、信息获取、沟通和娱乐,这些都是学生在校整体学习体验中值得关注的地方.移动设备的更多用途还有待澄清、宣传、演示、培训、支持.此问卷还显示学校和研究者应考虑移动学习项目可支持的多种学习方式和因学习者而异的多种教育用途.  相似文献