“理实一体化”教学方法的比较与运用

"理实一体化"是一种有别于传统的先理论后实践,有利于学生动手能力和专业技能培养的教学模式。其基本特征是突出理论结合实践、师生互动及应用现代化教学手段。"理实一体化"教学方法多种多样,其特点、要求各异,教学中应精讲多练,应根据不同类型课程选择适宜的教学方法。同时,教学方法不应该是单一的,应根据授课内容的需要有所偏重或多种方法综合应用。

关于电工基础课程的理实一体化教学探讨

针对中职学生的生源状态,以电工基础课程为例,客观分析传统教学模式存在的弊端,阐述理实一体化教学模式的要领及特点,运用理实一体化教学方法对电工基础课程的教学内容、教学手段、教学过程和教学考核等方面进行探讨,进一步表明理实一体化在电工基础教学中所占的优势。

试论在中等职业院校中理实一体的教学法

随着科技和经济的发展,复合应用型人才的需求量增大,中等职业院校的教育需要更新理念,逐步推进。本文通过对理实一体教学策略与方法的分析,对现行的教学法提出了落实的三个条件和避免走进的三个误区,对中职教育起到一定的指导意义。

组合方案法的计算机配棉原理及应用

提出一种新的计算机配棉方法—组合方案法,介绍其原理及基于计算机配棉系统的开发方法,该法对企业快速开发产品,降低成纱成本具有积极作用。

“工程力学”在工作过程系统化课程开发中的探索与实践

工作过程系统化的课程改革,是当今高等职业教育课程改革新的趋势。"知识的总量未变,知识排序的方式发生变化",正是对这一新的职业教育课程开发方案中所蕴涵的革命性变化的本质概括,也是课程开发的全新理念。本文论述的是高职高专院校工作过程系统化课程改革中"工程力学"课程内容编排的总体设计理念和方式、教学方法的创新、教材建设、实训条件建设等教学各方面积累的一些经验。

电子技术系列课程的多模式线上教学实践

2020年初开始,一场大规模的线上教学活动在国内广泛展开,电子工程学院根据电子技术系列课程的特点,经课题组统筹规划开始实施线上教学,创设多样化的教学环节,采用多种互动模式,建立多种考核评价机制,并创新使用“线上理实一体”教学方法,采用多种线上实验模式与线上理论同步教学。经期末终结测试反馈,三门课程教学效果优良,取得较好的实践效果。

构建《汽车检测与维修技术》专业合理的课程体系

通过对汽修专业相关的职业岗位进行全面的调查、认真的分析,在广泛征求汽车维修企业专家、基层管理工作者及专业建设委员会意见的基础上,根据《汽车检测与维修技术》专业高职教育定位和人才培养目标,制订符合要求的人才培养方案、核心课程的质量标准,为专业基本建设、人才培养质量与课程教学质量监控、评价和考核建立必要的基本规范。

Design of the Testing System for Jet Elements

To analyze the errors of processing data, the testing principle for jet elements is introduced and the property of testing system is theoretically and experimentally studied. On the basis of the above, the method of processing data is presented and the error formulae, which are the functions of the testing system property, are derived. Finally, the methods of reducing the errors are provided. The measured results are in correspondence with the theoretical conclusion.

The simulation of far-field wavelets using frequency- domain air-gun array near-field wavelets

Air-gun arrays are used in marine-seismic exploration. Far-field wavelets in subsurface media represent the stacking of single air-gun ideal wavelets. We derived single air-gun ideal wavelets using near-field wavelets recorded from near-field geophones and then synthesized them into far-field wavelets. This is critical for processing wavelets in marine- seismic exploration. For this purpose, several algorithms are currently used to decompose and synthesize wavelets in the time domain. If the traveltime of single air-gun wavelets is not an integral multiple of the sampling interval, the complex and error-prone resampling of the seismic signals using the time-domain method is necessary. Based on the relation between the frequency-domain phase and the time-domain time delay, we propose a method that first transforms the real near-field wavelet to the frequency domain via Fourier transforms; then, it decomposes it and composes the wavelet spectrum in the frequency domain, and then back transforms it to the time domain. Thus, the resampling problem is avoided and single air-gun wavelets and far-field wavelets can be reliably derived. The effect of ghost reflections is also considered, while decomposing the wavelet and removing the ghost reflections. Modeling and real data processing were used to demonstrate the feasibility of the proposed method.

理实一体化在汽修教学中的探索

客观分析传统汽修教学模式存在的弊端,阐述理实一体化教学模式的要领及特点,阐述理实一体化在汽修专业课中的应用实践,探索理实一体化在汽修专业课中的专业课教学中实施急需解决的几个问题。

Purification of Crude Glycerol from Waste Cooking Oil Based Biodiesel Production by Orthogonal Test Method

Purification of original crude glycerol obtained from biodiesel production was conducted in a laboratory scale equipment by means of a combined chemical and physical treatment method based upon repeated cycles of acidification of liquid phase to the desired pH value by using 5.85% H3PO4 solution for pH value adjustment, and the mixture was kept at 70 ℃ for 60 rain to make phase separation for obtaining a glycerol-rich middle phase. The yield of crude glycerol reached 81.2%. Subsequently, upon reaction of the obtained glycerol phase with 0.03% of sodium oxalate at 80 ℃ for 30 min the impurity removal rate was equal to 19.8%. The fraction boiling between 164 ℃ and 200 ℃ was collected by vacuum distil- lation followed by decolorization with 2% of active carbon at 80 ℃ for two times to yield the product glycerol with an ac- ceptable purity of 98.10%.

Probabilistic analysis of random contact force between geomembrane and granular material

A probabilistic method based on principle of maximum entropy was employed to analyze the randomness of contact force between geomembrane and granular material.The contact force distribution is exponential according to the proposed method and the grain size is the most important factor that affects the distribution of contact force.The proposed method is then verified by a series of laboratory experiments using glass beads and cobbles as granular material and a very thin pressure,indicating that film is firstly used in these experiments which give a reliable method to measure the contact force at each contact point.

Enzymatic Treatment for Shrink-proofing of Wool

An alkaline protease was applied on wool knitted fabric in an attempt to improve its shrink resistance. The influence of process parameters was evaluated and the tensile properties, surface characteristics and whiteness of wool were also studied. The results showed that the action of the protease on wool was significantly enhanced by hydrogen peroxide pretreatment. Based on the preliminary test and subsequent factor analysis, an appropriate combined process was obtained. The SEM investigation of the surface characteristics demonstrated that the enzymatic action was not uniform. In addition to the antifelting effects, the enzymatic treatment could lead to an improved degree of whiteness.

Measuring Propeller Blade Width Using Binocular Stereo Vision

Propeller blade width measurement has been extensively studied in the past using direct and indirect methods, and it plays a great role in determining the quality of the finished products. It has surveyed that previous techniques are usually time-consuming and erroneous due to a large number of points to be processed in blade width measurement. This paper proposes a new method of measuring blade width using two images acquired from different viewpoints of the same blade. And a new feature points matching approach for propeller blade image is proposed in stereo vision measurement. Based on these, pixel coordinates of contour points of the blade in two images are extracted and converted to real world coordinates by image algorithm and binocular stereo machine vision theory. Then, from the real world coordinates, the blade width at any position can be determined by simple geometrical method.

Managing Complexity and Speed of Processes in the Organizations—A Philosophical and Practical Approach

The business challenges of today are managing complexity and the speed of changes with processes and systems since there are continuously new requirements from market, consumers, suppliers, employees, government etc. For example, when product and service innovations are launched on the market, the relevant processes, policies, people, systems, and technologies should have been prepared and set up in advance. Depending on the business sector, the implementation of new processes and systems as well as their continuous improvement can be easy to very complex and of course very costly. Responding to those challenges, there are several methodologies and approaches like Continuous Improvement Process, Lean Management and Kaizen etc. On the other hand, the application of these methodologies to other industries like service and technology companies is not always successful since their conditions and requirements are different than those of manufacturing organizations. Because of these reasons, the management needs to find out （new） ways of working and to implement new solutions in order to master those challenges and problems. This is not always easy and successful. There are different types of solution options that can be applied situational in every organization. Philosophy can help essentially by asking and answering critical questions in order to provide with solution options to reduce the complexity and to increase the speed of processes. There are several proven and new governance concepts, frameworks, and tools which follow their philosophies. This paper demonstrates how those challenges can be responded and managed as well as how a philosophical approach can help primarily to provide with appropriate solutions.

Aniline destruction by supercritical water oxidation and its reaction kinetics

Supercritical water oxidation （SCWO） is an effective method for wastewater treatment. In this study, a lot of experiments are carried out to study the influence of various factors on the aniline destruction rate in the SCWO process with a novel experiment setup. The experimental results show that the aniline destruction rate rises with the increase of the residence time, the reaction temperature and the reaction pressure. A dynamics analysis of the aniline SCWO reaction is conducted and the dynamic equation is obtained.

Laboratory investigation of axisymmetric single vacuum well point

Vacuum well point is a new but faint soft ground treatment method. This work focuses on the consolidation behavior of a reconstituted soft clayey specimen under vacuum well point combined with surcharge loading. The laboratory test was conducted through a vacuum-surcharge consolidation apparatus, and the vacuum loading scheme was adopted for vacuum pressure application to investigate the vacuum effect on soil consolidation. In the testing process, some key parameters such as vacuum pressure, pore water pressure and settlement deformation were timely recorded. Furthermore, the water content, void ratio and permeability coefficient of samples collected after loading were measured to reflect the consolidation characteristics. By comparing with the membrane system and membraneless system, something different was found for the vacuum well point method. The results indicate that the consolidation behavior of an axisymmetric single vacuum well point is almost identical to the behavior of vacuum preloading combined with prefabricated vertical drain(PVD), except for the distribution of the vacuum pressure along the well drain due to the structure of the vacuum well point. And the vacuum well point method may be useful for the improvement of soft clayey deposit in a certain depth.

A Simple Physical Approach to Study Spectrum of Baryons

The exact solution of Sehrodinger equation corresponding to a baryonic system is the main interest in the present work. We take into account both quadratic and Coulomb terms in the potential relation. Next, after presenting an exact solution, we have calculated the spin and isospin effects in both ground and excited states. The results are comparable with experimental data.

A Fast Algorithm for Improving the Visual Distance in Fog

Images captured outdoor usually degenerate because of the bad weather conditions,among which fog,one of the widespread phenomena,affects the video quality greatly.The physical features of fog make the video blurred and the visible distance shortened,seriously impairing the reliability of the video system.In order to satisfy the requirement of image processing in real-time,the normal distribution curve fitting technology is used to fit the histogram of the sky part and the region growing method is used to segment the region of sky.As for the non-sky part,a method of self-adaptive interpolation to equalize the histogram is adopted to enhance the contrast of the images.Experiment results show that the method works well and will not cause block effect.

Synthesis and characterization of an environmentally friendly PHBV/PEG copolymer network as a phase change material

Novel environmentally friendly poly（hydroxybutyrate-co-hydroxyvalerate） and poly（ethylene glycol） （PHBV/PEG） copolymer networks were synthesized through free-radical solution polymerization with PHBV diacrylate （PHBVDA） and polyethylene glycol diacrylate （PEGDA） as macromers. The molecular structure of PHBV/PEG copolymer network was characterized by Fourier transform infrared （FT-IR） and 1H nuclear magnetic resonance （1H NMR）. The morphology of the PHBV/PEG co- polymer network was characterized by polarization optical microscopy. Thermal energy storage properties, thermal reliability and thermal stability were investigated by differential scanning calorimetry （DSC） and thermogravimetric analysis. The results indicated that the PHBV/PEG copolymer network hindered the growth of PEG crystalline segments or PHBV segments. PHBV/PEG copolymer network had a higher latent heat enthalpy, which didn＇t reduce with the components of PHBV in- creased. Moreover, PHBV/PEG copolymer network still had good thermal stability even at 300 ~C. These results suggested that such environmentally friendly copolymer network would have wide applications in phase change energy storage materials.