论新课程标准下的高中化学实验的教育功能

《普通高中化学课程标准》的颁布,标志着我国高中化学课程改革进入了一个崭新的时代．化学实验是化学科学的重要基础,中学化学实验在高中生认识和研究化学科学中有着十分重要的意义．新课程高中化学实验课应成为学生获取科学知识和实验技能的重要手段,培养和提高学生非智力品质的重要过程和培养学生创新能力的重要渠道．     

A VBA‐based Simulation for Teaching Simple Linear Regression

In spite of the name, simple linear regression presents a number of conceptual difficulties, particularly for introductory students. This article describes a simulation tool that provides a hands‐on method for illuminating the relationship between parameters and sample statistics.     

模式识别在化学工程中的应用

运用模糊集理论及模式识别,对催化剂再生活性、流体流型和裂解炉结焦周期的识别,通过对不同距离和贴近度的计算,取得了良好的效果。     

如何加强化工专业本科学生的安全教育

根据中国石油大学(华东)本科化工专业认证中存在的问题,结合化工专业的专业特点,提出了在本科化工专业中加强安全教育是培养高素质复合型化工专业人才的重要途径.在化工专业学科建设中,应该明确安全教育所扮演的重要角色,加强学生的安全教育.加强本科化工专业学生的安全教育主要有培养安全意识、优化课程设置、充分发挥多媒体教学的优势和增强实践环节等途径.     

Mastery,insight, and the teaching of chemistry

The learning of chemistry is described as a process analogous to the process of making chemical discoveries. Historical examples are given to show how chemists have used their insight to break out of a conceptual loop in order to advance the science. Having the insight to make the intuitive leap necessary to break a conceptual loop is as important as having the mastery of the pertinent facts. As in making chemical discoveries, learning elementary chemistry requires developing insight as well as acquiring mastery of the facts. However, current general chemistry teaching tends to teach facts first and insight later. Suggestions for improving this situation so that insight and facts are learned together are given. Finally, the nature of insight is probed more deeply and presented as a two-step process where the first step is an evaluation of the perceptions about science which are held. Once the student, teacher, or researcher has a clear evaluation of the validity of the perceptions that he or she holds, further significant progress toward understanding or scientific discovery is possible.     

浅谈频率合成技术及其发展

介绍了频率合成技术的发展历程,指出了其前景。     

化学实验的误差分析及其优化设计

物理化学和分析化学实验数据的处理和表达与数据的误差分析紧密相关.通过对实验数据的误差分析有利于优化实验设计,使实验具有更高的可信度和达到良好的实验结果.     

Push-Penny: Are you a Random Player?

Several measures of “success” for a simple game are discussed. Comparisons between players, and between a player and a simulation, can be made in several ways.     

聚乙二醇活化酯修饰重组人白细胞介素-2

目的研究单甲氧聚乙二醇三聚氯氰(Methoxypolyethylene Glycol activated with cyanuric chloride,CC-mPEG)和单甲氧聚乙二醇硝基苯基碳酸盐(Methoxypolyethylene Glycol p-nitrophenyl carbonate,NC-mPEG)两种PEG活化酯修饰重组人白细胞介素-2(rhIL-2)的修饰条件和修饰后的性质。方法在不同反应条件下用CTLL-2细胞/MTT法测定rhIL-2修饰后的生物学活性。结果随着PEG活化酯的摩尔比提高,修饰率增加,用CC-mPEG修饰rhIL-2后生物学活性损失很大,PEG400的加入可以降低CC-mPEG的投料摩尔比;NC-mPEG修饰的rhIL-2后生物学活性基本保留。     

Illustrating the Dangers of Hunting the Process Mean

This article describes two simple ways to illustrate the important concept in statistical process control known as “hunting”. The two simulations use dice and Minitab respectively.