多媒体技术在大学物理实验教学中的应用

文章认为对大学物理实验课进行教学改革，应把多媒体教学方式和传统教学方式相结合，引进多媒体教学设备，开发实用的多媒体课件和网络教学资源，促进教师的主导作用和学生的主体作用有机结合。     

优化大学物理教学过程 提高大学物理教学效果

提高大学物理教学效果是物理教师追求的目标,本文论述了提高大学物理教学效果的途径和方法。大学物理教师要加强自身专业知识的积累,强化教学基本功,精心备课,组织好课堂教学,培养学生的创新思维能力,逐步形成自己独特的教学风格和艺术。     

对“大学物理”教学改革的思考

文章从对“大学物理”教学现状的思考入手，阐述了“大学物理”教学改革的必要性，并针对“大学物理”教学的现状，提出了相应的改革方法和措施。     

从素质教育的高度改革大学物理教学

大学物理是高等理工院校各专业学生的一门重要的必修基础课,它不仅具有知识教育功能,还有更深刻的化教育功能。前表现为学好大学物理可以为大学生学习其它自然科学和工程科学打下深厚的理论基础,后正如中科院院士北京大学教授甘子钊所指出的那样,在发挥物理学知识教育功能的同时,“还要重视物理学的知识在建立正确的物理观、时空观和宇宙观上的作用;重视物理学本身反映出来的崇尚理性、崇尚实践、追求真理的精神,也就是说要认识物理学的教学与学习的化功能。”物理学的这些功能体现在整个教学过程中,对每一位理工科大学生在校学习、未来发展以及终身学习都会产生深远的影响。它有利于学生科学思维和创新意识的培养,也有利于学生实践能力、知识更新能力、适应能力的提高和优秀品格的形成。总之,通过大学物理的学习能提高大学生的综合素质,其在大学生素质教育中占有不可替代的极其重要的地位。为此,必须站在素质教育的高度来认识大学物理教学的改革。     

大学物理分层教学教学方法的研究

民族院校学生的个体差异性较大、基础较差,这都是大学物理教学所面临的实际问题。改革传统的教学模式,对学生进行分层教学是解决本问题的最好方法。从尊重个体差异,培养学生的创新能力入手,提出大学物理分层教学的四种教学方法,并且探讨实行这些教学法应该遵循的原则。     

在大学物理教学中促进大学生心理健康

通过对扩招后高校大学生心理问题的分析,从大学物理教学自身的特点出发,把解决大学生心理健康问题引入到大学物理教学中来,目的是达到高校内部全员参与解决当前大学生心理不健康的突出问题.     

浅论学生创新能力的培养

文章阐述培养学生创新意识和创新能力的重要性和必要性，培养措施、方法和环境，建设创新型师资队伍，把培养人才的创新意识和能力寓于各个教学环节和整体教学过程中。     

略论工科“大学物理”课程在素质教育中的作用

在工科专业人才素质教育中。“大学物理”课程有其独特的作用;在“大学物理”教学过程中要充分利用物理题材。促进学生科学世界观的形成;注意培养学生的科学思维能力,不失时机地对学生进行科学方法训练。     

机械类专业本科生实践创新能力培养体系的研究与实践

在一般高校当中,机械类专业最重的培养目标就是应用型人才,它也是最为最重要的一个核心内容,重点培养学生的创新意识以及他们的应用能力,但是,怎样可以把培养环境以及教学体制完整的相结合,从而促使学生发挥出他们的积极兴趣,能动性,创新教学的理论等方面,这才是我们研究的方向。本文主讨论了怎样可以培养学生的实践性、思维创造性、实践能力以及培养他们的工程训练,更为全面的实现教学体系的改革。而在教学当中,实践教学则是作为高等教育当中一个关键的环节,必须要让学生亲身感受到创新能力的重要性,并且起到重视的作用。     

加强大学物理课程建设 努力提升教学质量

高等院校必须做好各项教学建设工作,因为人才培养是学校的根本任务,质量是学校的生命线,教学是学校的中心工作。教育工作者要树立科学的质量观,促进学生德智体美全面发展。本文结合我校大学物理课程的建设工作,从教学的几个环节,提出了大学物理教学内容及教学方法改革的几点想法,现将一些做法和体会与各位同仁做一交流,旨在相互学习,互相提高,不断提升大学物理的教学质量。     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Thixotropy of Systems with Shear Thinning and Plastic Flow Behavior

The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We ...     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.