高职制冷专业校外实践教学基地建设

校外实践教学基地是校内实践教学基地的重要补充,建设好高效的校外实践教学基地是高等职业教育中的重要课题。结合南京化工职业技术学院制冷专业校外实践教学基地建设的实际,对高职制冷专业校外实践教学基地建设的意义、应具备的条件、建设的模式和建设过程等方面进行了探索,取得了一定的成效。     

建筑实训基地与实践教学

实践教学是高等职业教育中非常重要的教学环节,介绍利用实训基地建设,改革实践教学内容与体系,并在实践教学中进行的一些探索与实践。     

高职装潢艺术专业教学改革的目标与思路

高等职业技术教育经过近几年来的发展,已具有较大规模,为我国的高等教育注入了新的活力。由于高等职业教育成规模发展的时间较短,教学体系尚不成熟,许多问题,诸如专业建设、"双师"队伍建设、教材和课程建设等,尚在研究、摸索阶段。尤其是装潢艺术专业中的课程设置和实践教学的不合理与授课方式的落后,必须引起我们的高度重视。本文对高职装潢艺术专业教学改革作如下的探讨。     

高职计算机专业教学解决方案的研究

高等职业技术教育在我国只有十余年的历史,目前尚处于发展阶段,课程建设等相关研究也正在探索之中,尤其是高职院校计算专业实用技术和能力培养核心的课程体系建设、能力体系建设以及实践教学体系的建设,急需从传统的教学模式的‘阴影’中走出来,拓展思路,将理论与实践相结合,才能有益于专业建设和课程发展。     

国家示范性高等职业院校建设的探索与实践

本文从人才培养模式、课程内容体系、教学评价体系、师资队伍建设和质量控制等几方面论述了国家示范性高等职业院校建设的实施,对探索中国特色的高等职业教育和其它高职院校起到借鉴作用。     

英语教学如何适应高等职业教育

高等职业技术教育既是职业教育又是高等教育,随着我国对外语人才在数量和质量上的要求越来越高,在蓬勃发展的高职教育这一领域,英语教育也就成为一个重要且必要的组成部分。故此文章在实践教学的基础上,分析目前高职英语教学存在的问题以及产生的原因,并从教学理念,教材选择,师资队伍建设,教学模式,评估系统五个方面提出了改进高职英语教学的手段,以期促进高职英语教学适应高等职业教育     

对现代高等职业教育的一点思考

积极发展高等职业教育,是经济建设和社会发展的需要,也是调整教育结构、建立健全职业教育体系的重要举措。本文介绍了高等职业教育与普通高等职业教育的区别和现代高等职业教育存在的问题与发展方向。     

高等职业技术学院食品专业实验室建设的几点思考

高等职业院校食品专业实验室的建设要符合高等职业教育特有的教育方式和教学计划要求．又要符合高职院校的管理制度和运行机制,通过构建合理的食品专业实践教学体系、整合资源、合理规划、配备师资、完善制度,为学校的应用型教学,技能实训和科研工作服务,以达到“资源共享,人尽其才,物尽其用”的利益最大化目的,实现培养高级技能型食品人才的目标。结合烟台南山学院食品专业实验室建设与管理的经验,提出几条合理化建议。     

普通机床电气系统安装与维修课程设计与实施

高等职业教育的目的是培养具有一定文化水平和专业知识、专业技能的应用型人才。与普通教育和成人教育相比,高等职业教育则更侧重于实践技能和实际工作能力的培养。作为教育的一个类型,高等职业教育既要遵循普通高等教育的一般规律,更要充分体现职业教育的特殊要求,办出特色。高职教育教学建设的核心内容是专业建设,而专业建设的核心则是课程建设。高职课程体系构建必须坚持校企合作原则。如何进行基于工作过程导向的课程开发,如何建设配套的教学队伍是课程改革的关键。     

工程类高职院校生产实习改革探讨

高职院校生产实习必须与本科工程教育相区别,以岗位能力指标体系为基础、以能力培养为主线构建实践教学体系;努力建设校内外实践基地,形成良好的实践教学指导教师队伍,科学、合理地组织教学内容与程序,全方位强能力培养,以高质量保证培养目标的实现。     

Estimation of Parameters of Universal Distribution of Moments of Failure of Products

A method is proposed for estimating the parameters of a mixture of exponential and Weibull distributions for which the accuracy of preliminary estimates obtained by graphical analysis is refined in accordance with the criterion of maximum likelihood. The efficiency of the proposed method is supported by the results of statistical modeling.     

Assessment of intakes of mixtures of radionuclides

Australia has several uranium mines and a large number of mineral sand mines, with associated processing facilities. Exposures resulting from these mining and processing operations usually involve intakes of mixtures of radionuclides. This work describes the development of a suite of first order, linear compartment models, based on the ICRP Publication 66 respiratory tract model, and an analytical solution to the decay equations, for assessing the consequences of such intakes. The computer programs based on these models directly compute excretion, organ retention and organ and whole-body doses for intakes of either single radionuclides or any mixture of radionuclides belonging to the same radioactive decay chain. The intake can be via inhalation, ingestion or injection, and can be acute, chronic or of limited duration. The starting concentration and degree of secular (dis)equilibrium can be specified for each radionuclide. No assumptions need to be made about the relative magnitudes of the radioactive half-lives of the different nuclides.     

卧式金属罐容量的测量结果不确定度

本文根据多年的实践检定经验 ,参照JJF1 0 59- 1 999《测量不确定度评定与表示》以及《测量不确定度表达 1 0讲》 ,对卧式金属罐容量的测量结果不确定度进行了评定。     

盐酸浓度不确定度的评估

通过对盐酸浓度标定的过程分析，找出影响结果的各个分量，进行不确定度的评定，按照计量技术规范给出标准的表示法。     

Analysis of the rate of propagation of the wave of change of boiling modes

An approximate analytical expression is derived for the velocity of the front of the wave of change of boiling modes on a rod and on a plate. The impact of the Thomson effect and of the heater orientation in the gravity field is included. Adequate agreement is demonstrated between the derived relations and experimental data.     

Evaluation of optical properties of highly scattering media by moments of distributions of times of flight of photons

A novel method for the determination of the optical properties of tissue from time-domain measurements is presented. The data analysis is based on the evaluation of the first moment and the second centralized moment, i.e., the mean time of flight and the variance of the measured distribution of times of flight (DTOF) of photons injected by short (picosecond) laser pulses. Analytical expressions are derived for calculation of absorption and of reduced scattering coefficients from these moments by application of diffusion theory for infinite and semi-infinite homogeneous media. The proposed method was tested on experimental data obtained with phantoms, and results for absorption and reduced scattering coefficients obtained by the proposed method are compared with those obtained by fitting of the same data with analytical solutions of the diffusion equation. Furthermore, the accuracy of the moment analysis was investigated for a range of integration limits of the DTOF. The moment analysis may serve as a comparatively fast method for evaluating optical properties with sufficient accuracy and can be used, e.g., for on-line monitoring of optical properties of biological tissue.     

Analysis of anisotropy of properties on the basis of studies of texture of coarse-grained ingots of thermoelectric materials

An analysis of anisotropy of the properties of a Bi₂Se_0.3Te_2.7 solid solution was carried out using construction of demonstrative surfaces for thermoelectric effectiveness and thermal expansion coefficients. It is shown that the texture is an important factor forming anisotropy of properties and technological fitness of ingots for manufacturing modules. Anisotropy of properties based on the studies of the ingot textures obtained using the float-zone method and Bridgman method (growing thermoelectric plates in a flat cavity) was studied.     

Numerical study of methods of linearization of the output characteristics of radio-frequency sensors of the level of dielectric media

Different constructions of the sensing elements of radio-frequency level sensors based on sections of long lines are numerically investigated by means of the Matlab program for the purpose of minimizing the measurement error caused by the nonlinearity of the output characteristic. It is shown that the nonlinearity is lowest for U-shaped designs. The nonlinearity factor KN may be regulated by varying the capacitance of a correcting capacitor connected to the input of the sensing element and (or) the length of one of the sections of the long line. In selecting an optimal capacitance of the correcting capacitor KN ≤ 0.15% for control media with dielectric permittivity in the range 2.2–30.