一类改进的Ross血吸虫病动力学模型的定性分析

建立了一类考虑钉螺总数变化的血吸虫病动力学模型,利用谱半径的方法计算得到基本再生数R0,证明了当R0<1时无病平衡点全局渐近稳定,当R0>1时地方病平衡点全局渐近稳定.     

基于知识图谱的国内知识网络研究

国内知识网络研究的年发文量和学术共同体规模总体上呈增长趋势,期刊分布、机构分布、作者分布均呈现相对集中与高度离散并存的特征,研究热点主要包括知识管理、产业集群、社会网络、知识流动、复杂网络、数字图书馆、知识共享、知识服务、知识转移等;知识网络理论研究重点集中在知识网络的概念、类型、结构、构建方法、形成与演化的动力及机制等方面。     

Hibernate中关联关系映射策略研究与实现

为解决对象模型和关系模型之间的不匹配,引入对象关系映射框架来解决。Hibernate是目前主流的ORM映射框架。分析了Web应用程序的体系结构和Hibernate体系结构。以在线购物系统为例,给出了对象关联关系映射策略,通过映射文件实现了该映射策略。实验结果表明,映射文件成功实现了该映射策略。通过Hibernate的数据持久层解决方案,提高了数据存取的速度,降低了系统的耦合性,保证了系统的扩展性。     

中值定理在复函数中的应用

中值定理在复函数的理论和研究中起着至关重要的作用,研究其形式对于数学学习具有极为重要的意义,本文现就复函数中值定理的形式做如下探讨。     

Preparing literary material for public utterance

This essay claims that arguments about the genres of discourse contain as a crucial element an attribution of status, which involves a dialectic of authority and marginality. Rhetorical scholarship is often a reaction against the condition of marginality. Reflection on these matters illumines the ontology of rhetorical discourse.     

Editorial

THE INDEPENDENT STUDY PROGRAM IN THE UNITED STATES, A REPORT ON AN UNDERGRADUATE INSTRUCTIONAL METHOD. By Robert Bonthius, F. James Davis, J. Garber Drushal, in Collaboration with Frances V. Guille and Warren P. Spencer. New York: Columbia University Press, 1957; pp. xxi+259. $4–50.

THE CHALLENGE OF SOVIET EDUCATION. By George S. Counts. New York: McGraw‐Hill, 1957; pp. xii+330. $6.00.

A FOURTH OF A NATION. By Paul Woodring. New York: McGraw‐Hill, 1957; pp. vii+255. $4.50.

A DICTIONARY OF CONTEMPORARY AMERICAN USAGE. By Bergen Evans and Cornelia Evans. New York: Random House, 1957; pp. viii+567. $5.95.

JOSEPH GLANVILL, ANGLICAN APOLOGIST. By Jackson I. Cope. St. Louis: Washington University Studies, 1956; pp. 179. $3.75.

GRIECHISCH‐RÖMISCHE RHETORIK 1915–1925. By Georg Lehnert. Jahresbericht über die Fortschritte der klassischen Altertums‐wissenschaft, Vol. 285 (1944–1955), pp. 5–198. Göttingen: Vandenhoeck &; Ruprecht, 1956. [$10.72.]

PATRICK HENRY, PATRIOT IN THE MAKING. By Robert D. Meade. (Virginia Edition.) Philadelphia: J. B. Lippincott, 1957; pp. x+431. Illustrated. $7.50.

WOODROW WILSON AND THE WORLD TODAY. Edited by Arthur P. Dudden. Philadelphia: University of Pennsylvania Press, 1957; pp. x+96. $3.75.

WILSON'S FOREIGN POLICY IN PERSPECTIVE. Edited by Edward H. Buehrig. Bloomington: Indiana University Press, 1957; pp. 176. $4.50.

WOODROW WILSON. By Silas Bent McKinley. New York: Frederick A. Praeger, 1957; pp. 284. $4.50.

THE DEMOCRATIC ROOSEVELT: A BIOGRAPHY OF FRANKLIN D. ROOSEVELT. By Rexford G. Tugwell. New York: Double‐day, 1957; pp. 712. $8.50.

GROUP DISCUSSION PROCESSES. By John W. Keltner. New York: Longmans, Green, 1957; pp. x+373. 14.50.

THE AGE OF TELEVISION. By Leo Bogart. New York: Ungar, 1956; pp. xii+348. $6.50.

BRITISH RADIO DRAMA 1922–56. A Survey by Val Gielgud with a Foreword by Sir William Haley, K.C.M.G. London: Harrap, 1957; pp. 207, 15/.

TRAGEDY. By William G. McCollom. New York: Macmillan, 1957; pp. ix+254. $5.00.

ON THE DESIGN OF SHAKESPEARIAN TRAGEDY. By Harold S. Wilson. Toronto: University of Toronto Press, 1957; pp. 256. $5.00.

ENGLISH SENTIMENTAL DRAMA. By Arthur Sherbo. East Lansing, Michigan: Michigan State University Press, 1957; pp. viii+181. $4.50.

THE IRRESISTIBLE THEATRE. By W. Bridges‐Adams. Cleveland and New York: World, 1957; pp. xiv+446. $6.00.

THE VARIORUM EDITION OF THE POEMS OF W. B. YEATS. Edited by Peter Allt and Russell K. Alspach. New York: Macmillan, 1957; pp. xxxvi+884. $18.50.     

How a qualitative approach to concept map analysis can be used to aid learning by illustrating patterns of conceptual development

This paper describes a qualitative approach to analysing students' concept maps. The classification highlights three major patterns which are referred to as 'spoke', 'chain' and 'net' structures. Examples are given from Year 8 science classes. The patterns are interpreted as being indicators of progressive levels of understanding. It is proposed that identification of these differences may help the classroom teacher to focus teaching for more effective learning and may be used as a basis for structuring groups in collaborative settings. This approach to analysing concept maps is of value because it suggests teaching approaches that help students integrate new knowledge and build upon their existing naive concepts. We also refer to the teacher's scheme of work and to the National Curriculum for science in order to consider their influence in the construction of understanding. These ideas have been deliberately offered for early publication to encourage debate and generate feedback. Further work is in progress to better understand how students with different conceptual structures can be most appropriately helped to achieve learning development.     

基于Hibernate的数据持久化应用研究

Hibernate是一个对象持久化工具,它通过其强大的O/R映射功能将Java对象同存放于关系数据库中的数据进行映射,避免了开发人员使用大量的SQL语句通过JDBC的方式对数据库进行操作,可以有效地提高开发的效率。将其应用于企业在线资产管理系统,可充分利用其优点。     

一类圆域上广义解析函数拟线性Riemann-Hilbert问题

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ｔｈｅｂｏｕｎｄａｒｙｖａｌｕｅｐｒｏｂｌｅｍｓｏｆｐａｒｔｉａｌｄｉｆｆｅｒｅｎｔｉａｌｅｑｕａｔｉｏｎｓｈａｓｂｅｃｏｍｅａｎｉｍｐｏｒｔａｎｔｓｕｂｊｅｃｔｉｎｍｏｄｅｒｎａｐｐｌｉｅｄｍａｔｈｅｍａｔｉｃｓ.Ｗｉｔｈｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆｓｃｉｅｎｃｅａｎｄｔｈｅｒｅｑｕｉｒｅｍｅｎｔｏｆｐｒａｃｔｉｃａｌａｐｐｌｉｃａｔｉｏｎ ,ｉｎｖｅｓｔｉ ｇａｔｉｏｎｓｉｎｔｈｉｓｆｉｅｌｄｈａｖｅｂｅｅｎｔｒａｎｓｆｅｒｒｅｄｆｒｏｍｃｌａｓｓｉ ｃａｌｌｉｎ…     

柯西中值定理的复合证法

本文从柯西中值定理证明的基本思想出发,给出了引入辅助函数的六种思考方法。