数学建模的创新教育与创新能力的培养

本文论述了数学建模的创新教育与创新能力培养的内在关系，并较详细地介绍了数学建模的创新教育的实践过程、方法和效果，用事实说明了数学建模的创新教育在创新能力的培养过程中。     

数学建模与学生综合素质的培养

目的:数学建模教学与竞赛活动的开展对学生综合素质培养的作用;方法:通过调查问卷,用因子分析法对数据分析.借用spss工具数字化体现数学建模在提高学生综合素质所起到的作用;结果:数学建模在提高分析和解决问题的能力、养成自主探索和刻苦钻研的品质、创新精神和实践能力的培养、建立团队精神与相互协作意识等七个方面对学生综合素质培养有作用;结论;数学建模对学生综合素质有重大影响.     

数学建模融入财经类大学数学教学的理论与实践

本文首先论述了数学建模融入大学数学教学的内容、模式、意义、目的、必要性与可能性，然后举例说明设计并作了具体的实践的具有财经类院校特点的教学单元、案例、章节。     

数学建模思想方法融入线性代数教学中的研究与实践

本文根据作者的教学实践，对数学建模活动中积累的先进教学思想、教学方法与数学主干课程-线性代数教学有机融合的问题进行了研究。并结合一次实践课，分析了这种融合的效果及对数学教育改革的促进作用。     

将数学建模教学贯穿大学生培养全过程

全国大学生数学建模竞赛已开展了十二届，参赛学校和队数逐年大幅度增加，目前面临的一个关键问题是许多学校片面追求竞赛的获奖情况，而忽视了数学建模教学的重要性，没能将竞赛与大学生培养全过程结合起来。近年来，浙江大学在数学建模教学上进行了大胆改革和尝试，以数学建模竞赛为载体，培养大学生的素质和能力，在国内、美国大学生数学建模竞赛中取得了非常优异成绩，文章从六方面陈述浙江大学数学建模教学改革的经验。     

浅谈数学建模的教学方法

数学建模就是用数学语言描述客观系统的过程。根据参加数学建模竞赛和授课经验,本文分析了数学建模课程与当代大学教育之间的关系。根据当代大学特点,给出了数学建模的授课方法以及具体的实施方法。本文将数学建模活动划分为三个阶段,经过逐个阶段的教学,学生可以学会如何对模型进行数学形式的刻画和构造,并且提高学生的应用能力、创新能力及科研论文的写作能力。     

数学“再发现”式创造性思维的教学实践

本文通过分析教育意义下的创造性思维，即“再发现”式创造性思维，得出在大学数学教学阶段，应该多关注学生“再发现”式创造性思维的发展，并在数学课堂教学、数学实验教学和数学模型教学三方面就学生的“再发现”式创造性思维进行了探索和实践。一方面，数学课堂教学离不开数学实验教学和数学模型教学，后者是数学“再发现”式创造性思维训练的深化和拓展，另一方面，在数学实验教学和数学模型教学中就如何培养学生的创造性思维探索了一个教学实践的方向。     

将数学建模思想、方法融人概率论与数理统计课程教学的一点尝试

数学作为一种工具，其应用范围早已遍及各学科领域，重要性不言而喻。当今，大学数学教学中突出的问题就是过分强调书本知识的传授，照本宣科现象比较严重……。数学建模的思想、方法为大学数学教学改革提供了一种全新的思路。为了让学生不仅能够学到一些重要的数学概念、方法和结论，尤其能理解数学的思想和思维方法，并通过实践真正掌握数学应用的能力。我们尝试着在《概率论与数理统计》课程教学中引人数学建模的思想和方法：其一，对课程的内容进行了适当的改动：减去了一些繁杂的推理证明过程，增添了一些简明生动的应用问题；其二，对教学的方法进行了改革：尽可能地用问题、事例来导人概念；其三，简要介绍Matlab软件的基本用法、并利用多媒体教室演示效果；一年多的实践证明：改革的思路是基本正确的，且收到了良好的效果。     

高等职业专科学校数学建模课程建设的探讨

面对21世纪的高等职业专科学校的教育应以培养应用型人才为目标,人才的知识能力结构是应用型,而不是学术型;要按照应用型能力结构,重新构建理论和实践教学的体系;要强调理论知识的应用和实践动手能力的培养。本文提出通过对数学建模思想的渗透,培养学生数学应用的意识、思想和方法,提高解决实际问题的能力与创新精神,这在高等职业专科教育中显得尤为重要。     

如何使学生能够具有初步的创新精神和实践能力

数学是学生感兴趣的一门学科,因为它与实际生活联系紧密,可以解决很多实际问题,有一定的应用性。在数学教学中如何培养学生的创新和实践能力?"创新""实践"实际上是每个学生都具有的能力,关键在于教师如何挖掘和发展它们。在实际教学过程中对学生创新和实践能力的培养,已引起广大数学教师的高度重视,如何培养学生创新和实践能力,找到培养和发展学生创新和实践能力的有效途径,在数学教学中愈来愈显得重要。那么如何培养学生的创新能力和实践能力?     

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.