信息技术与物理学基础课程的整合及其教学实践

本文介绍了我们在信息技术与物理学基础课程教学过程的整合方面开展的一些工作及其教学实践，其中重点介绍了基于校园网的大学物理课程网络辅助教学系统的构建与教学应用；基于课堂教学的大学物理课程教学模拟软件的研制开发与教学应用；基于校园网的开放式物理实验网络选课系统的研制开发与教学应用等．     

Excel和Origin在处理物理实验数据中的应用和比较

结合实例介绍Excel和Origin两款软件在处理物理实验数据中的应用,并对各自的特点进行简单得比较。     

How do output growth-rate distributions look like? Some cross-country,time-series evidence

This paper investigates the statistical properties of within-country gross domestic product (GDP) and industrial production (IP) growth-rate distributions. Many empirical contributions have recently pointed out that cross-section growth rates of firms, industries and countries all follow Laplace distributions. In this work, we test whether also within-country, time-series GDP and IP growth rates can be approximated by tent-shaped distributions. We fit output growth rates with the exponential-power (Subbotin) family of densities, which includes as particular cases both Gaussian and Laplace distributions. We find that, for a large number of OECD (Organization for Economic Cooperation and Development) countries including the US, both GDP and IP growth rates are Laplace distributed. Moreover, we show that fat-tailed distributions robustly emerge even after controlling for outliers, autocorrelation and heteroscedasticity.     

A Mössbauer Study on Gray Stains in Electrogalvanized Steel

Transmission Mössbauer Spectroscopy (TMS) and Conversion Electron Mössbauer Spectroscopy (CEMS), together with X-ray diffraction (XRD) are applied to identify the origin of stain defects formed on one-side zinc-coated steel used in the automotive industry. The stained sheets were directly exposed to CEMS meanwhile absorbers for TMS were obtained by tape, scrapping, paper and ultrasound bath. Measurements, both by TMS and CEMS, show the presence of the -Fe signal in all the cases. CEMS measurements also indicate that a Mössbauer inactive coating covers the stained areas. Fe₃C and Fe–C signals, as minor ones, appear only when the absorber is prepared by paper. Results show that the stains are not due to a corrosion process and therefore the corrosion performance of the steel should not be affected by the presence of the stains over the non plated side. An incomplete cleaning of the oil used to protect the steel before entering the electrogalvanizing line would have produced the stains.     

Software sensors for monitoring of a solid waste composting process

Process identification for composting of tobacco solid waste in an aerobic, adiabatic batch reactor was carried out using neural network-based models which utilized the nonlinear finite impulse response and nonlinear autoregressive model with exogenous inputs identification methods. Two soft sensors were developed for the estimation of conversion. The neural networks were trained by the adaptive gradient method using cascade learning. The developed models showed that the neural networks could be applied as intelligent software sensors giving a possibility of continuous process monitoring. The models have a potential to be used for inferential control of composting process in batch reactors. Presented at the 33rd International Conference of the Slovak Society of Chemical Engineering, Tatranské Matliare, 22–26 May 2006.     

高分子化学试题库系统的开发

利用当前通行的关系数据库技术、采用VB编程语言和ACCESS数据库 ,设计了高分子化学教学试题库系统应用软件———“试卷魔术师”。它由四个模块组成 ,即试题库模块、试卷分析模块、资料库模块和辅助模块。具有试题的录入、删除、修改和访查、手工或自动生成试卷、试卷分析以及资料查阅等诸多功能。满足授权的用户可以利用它随机抽卷、查阅相关资料及历史成绩等。它不仅可以作为高分子化学课程教师生成试卷、分析试卷的有力工具 ,又可作为本专业学生进行高分子化学试题训练、自学并阅读课外参考资料的有效手段。它使用方便 ,操作简单 ,针对性强 ,是一种较为实用的计算机辅助教学软件工具     

Automatic search for maximum similarity between molecular electrostatic potential distributions

Summary A new computer program has been developed to automatically obtain the relative position of two molecules in which the similarity between molecular electrostatic-potential distributions is greatest. These distributions are considered in a volume around the molecules, and the similarity is measured by the Spearman rank coefficient. The program has been tested using several pairs of molecules: water vs. water; phenylethylamine and phenylpropylamine vs. benzylamine; and methotrexate vs. dihydrofolic acid.     

多媒体计算机辅助高分子物理教学的研究与实践

通过对课程的定位,教学资料的规范化、系列化、系统化和多媒体化,MCAI课件和计算机模拟软件的制作,网络的利用,以及多种媒体的组合教学,对多方位的多媒体计算机辅助高分子物理教学进行了研究与实践;为培养基础扎实、知识面宽、能力强、素质高的人才提供了一种切实有效的教学方案;并将课程建设推上了一个新台阶。     

Computer-assisted chemical structure analysis

The new generation of the CASE system described in this paper offers a promising approach to both spectrum interpretation and structure generation that allows for a natural linkage between them. The approach takes full advantage of the information contained in available spectral libraries, yet is not limited by the substructural deficiencies of these data bases.