MATLAB在化工仪表及自动化课程教学和实验中的应用

化工仪表及自动化是一门针对高等院校化工类专业以及其他工艺类专业开设的一门重要的专业基础课程。本文根据目前该课程在教学和实验中存在的问题,结合控制系统仿真软件MATLAB的特点和功能,详细介绍了MATLAB软件在化工仪表及自动化课程教学和实验中的应用方法。     

漏芦挥发油成分分析

通过对漏芦挥发油中化学成分分析比较研究,为漏芦的开发利用提供依据.采用同时蒸馏-萃取法提取漏芦中的挥发油,并以气相色谱-质谱联用法(GC-MS)对挥发油中的化合物进行分析鉴定.共鉴定出30个化合物,占其化学成分总含量的80.57%.漏芦挥发油中主要化学成分为萜类化合物.     

民族院校公共课教育学模拟教学初探

民族院校公共课教育学模拟教学形式，即在现有的课时内，在教师基本完成教学理论部分的传播后，由学生按规定独立准备教案，并以本班为模拟对象，依次上台试讲的教学实习活动。任课教师应克服各种困难，解决民族院校师资培养工作的难题。     

Chemical bleaching of wood: an investigation into the bleaching of mahogany,walnut, rosewood,padauk, and purpleheart

This paper investigates chemical bleaching of wood to make species-specific practical recommendations for colour adjustment of veneer in furniture conservation. In more detail, chemical bleaching of Honduras mahogany (Swietenia macrophylla), European walnut (Juglans regia), Rio rosewood (Dalbergia nigra), padauk (Pterocarpus spp.), and purpleheart (Peltogyne spp.) is investigated using 11 different bleach solutions. Both oxidative (e.g. hydrogen peroxide and potassium permanganate) and reductive (e.g. oxalic acid and sodium bisulphite) solutions were used. The results show that the wood species react differently with the investigated bleach solutions. It can also be noted that not all investigated solutions were suitable for all wood species. Based on the results, wood species-specific bleach solutions are recommended.     

Regression Models with Errors in the Predictor Variable

In this article Simon Day describes a computer simulation exploring one of the fundamental assumptions of regression analysis which causes students difficulties.     

黑钨矿中制取金属钨粉

以黑钨矿为对象，凭借钨的化学特性，通过一定的化学处理，制得较纯净的三氧化钨，并将三氧化钨经过氢气还原制得金属钨粉。     

The Impact of Learner’s Prior Knowledge on Their Use of Chemistry Computer Simulations: A Case Study

It is complicated to design a computer simulation that adapts to students with different characteristics. This study documented cases that show how college students’ prior chemistry knowledge level affected their interaction with peers and their approach to solving problems with the use of computer simulations that were designed to learn electrochemistry. Students with different prior knowledge levels were found to use different approaches to solving problems with the use of computer simulations. In particular, the cases showed that students with a high level of prior knowledge tended to use the equations and formulas to accomplish the learning tasks and then use the computer simulations to confirm their predictions. Students with a low level of prior chemistry knowledge used the computer simulations as the main resources to accomplish their tasks. Considerations of individual differences and the integration of learning materials were suggested for further research on instructional use of computer simulations.     

Trade-Offs, Biases, and Uncertainty in Project Planning and Execution: A Problem-Based Simulation Exercise

The ability to plan and execute projects is a fundamental skill required among managers and business school graduates. In the opening phase of a project, the project team makes decisions about the relative priority of project time, cost, and performance objectives, oftentimes without complete information about customer and stakeholder requirements. Existing project management curriculum assists in developing skills to decide among these priorities in the abstract through paradigms such as the time–cost–performance triangle, with limited attention to the improvement of skills required to develop solutions to these trade-offs, particularly in uncertain and ambiguous project environments. Further, there is often an underlying bias in project teams toward consideration of the project task and project deliverables and reduced attention to time and cost objectives. This study demonstrates the benefits of a balanced approach to setting project time, cost, and performance objectives using a goal-based simulation exercise entitled "The Bridge to Project Leadership." Results for 124 project teams illustrate the tendency to ignore this balanced approach, resulting in reduced project performance, even among experienced project managers.     

对《会计模拟实训》课程的再认识

《会计模拟实训》是会计学科的主干课程之一。充分认识该课程在理论与实践之间的桥梁纽带作用,对于高职高专会计专业学生的“应用型”、“适应型”能力的培养有着举足轻重的意义。本文力图通过解决会计实训教学中的问题和矛盾,探求实现教学目标的有效方式。