形象思维的重要方式──想象

在现代数学里，无论从事数学研究和数学教学，都离不开想象．本文介绍了想象的概念、作用及分类．     

An Internet-Based Self-Help Program for the Treatment of Fear of Public Speaking: A Case Study

ABSTRACT

This article discusses the development of the first totally self-administered online CBT program for the treatment of a specific social phobia (fear of public speaking) called talk to me. The online program includes three parts. The assessment protocol gives the patient information about the problem, including impairment, severity, and the degree of fear and avoidance regarding the main feared situations. The structured treatment protocol ensures that the patient does not skip any steps in the treatment. The treatment protocol is a CBT program that provides exposure to the feared situation using videos of real audiences. Finally, the control protocol assesses treatment efficacy, not only at posttreatment, but also at every intermediate step. In this work we describe talk to Me and its practical application through a case study.     

粉细砂含水地层隧道施工技术

秦文君是一个自我意识、童年情结很强的作家,新世纪以来的创作文体特色凸显,作家的童年在文本中多次闪现,显现了一位创作与人生交织的儿童文学作家的独特状况。以秦文君2000年以后的作品为研究对象,立足于儿童本位的儿童观和解放儿童的儿童文学观,充分挖掘作家本人和她的小说文本的精神世界,力图与秦文君的作品进行一次比较个人化的“对话”。     

Image estimators based on marked bins

The problem of approximating an ‘image’ S?? ^d from a random sample of points is considered. If S is included in a grid of square bins, a plausible estimator of S is defined as the union of the ‘marked’ bins (those containing a sample point). We obtain convergence rates for this estimator and study its performance in the approximation of the border of S. The practical aspects of implementation are discussed, including some technical improvements on the estimator, whose performance is checked through a real data example.