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1.
This paper presents an overview of the recent progress of potential theory method in the analysis of mixed boundary value problems mainly stemming from three-dimensional crack or contact problems of multi-field coupled media.This method was used to derive a series of exact three dimensional solutions which should be of great theoretical significance because most of them usually cannot be derived by other methods such as the transform method and the trial-and-error method. Further, many solutions are obtained in terms of elementary functions that enable us to treat more complicated problems easily. It is pointed out here that the method is usually only applicable to media characterizing transverse isotropy,from which, however, the results for the isotropic case can be readily obtained. 相似文献
2.
This paper presents an overview of the recent progress of potential theory method in the analysis of mixed boundary value
problems mainly stemming from three-dimensional crack or contact problems of multi-field coupled media. This method was used
to derive a series of exact three dimensional solutions which should be of great theoretical significance because most of
them usually cannot be derived by other methods such as the transform method and the trial-and-error method. Further, many
solutions are obtained in terms of elementary functions that enable us to treat more complicated problems easily. It is pointed
out here that the method is usually only applicable to media characterizing transverse isotropy, from which, however, the
results for the isotropic case can be readily obtained.
Project (No. 10372088) supported by the National Natural Science Foundation of China 相似文献
3.
Application of Hamiltonian system for two-dimensional transversely isotropic piezoelectric media 总被引：2，自引：2，他引：2
INTRODUCTION The traditional method of solving solutions of the transversely isotropic piezoelectric media belongs to Lagrange formulation so that the method of sepa- ration of variables cannot be applied due to the in- volvement of high order partial differentiation in the Euclidian space and is difficult for some problems. New theoretical system or method is a key for the investigation of piezoelectric materials. Since the foundational equations (Sosa and Pak, 1990) in transversely iso… 相似文献
4.
毛娉婷 《扬州大学学报(高教研究版)》2005,9(2):71-74
伴随着视觉媒介的日趋普及,人类的文化价值体系开始发生重大转变。从传统的书面文化体系向视觉文化体系的转移已不仅仅是一种阅读方式的转化,更多的应是人类整体认知领域的大变革。但同时视觉载体的过度开发也会带来诸如认知环境与现实环境日趋隔离等一系列问题,对于尚在成长期的青少年而言,不加选择的过度接触更有可能导致其世界观、人生观的异化。 相似文献
5.
Mary Nugent Dr Valerie Jones Deirdre McElroy Mary Peelo Teresa Thornton Theresa Tierney 《Educational Psychology in Practice》2014,30(3):255-271
This article reports on a two year project in which educational psychologists offered consultation to groups of teachers, to help them find solutions to school-based problems. Teachers were drawn from within individual schools and from across a number of schools. Typically, teachers were trained by educational psychologists in group consultation processes. Group consultation sessions were usually offered on a termly basis (three times per year). The group consultation sessions were facilitated by two psychologists. A formal process was followed, using a problem-solving structure. A pilot project ran for two years and was evaluated using quantitative and qualitative methods. Data were collected from teachers, school principals and psychologists. Findings indicate that group consultation is an effective method of service delivery, particularly for clusters of small, rural schools. The evaluation considers aspects of group consultation that could be further developed and new directions for this model of working. 相似文献
6.
丁勇莹 《佳木斯教育学院学报》2012,(8):378+380
本文简略介绍了农村留守儿童的基本状况。主要从家庭、学校和社会等三个方面阐述了留守儿童在社会化过程中存在的主要问题,初步分析了影响留守儿童社会化的具体因素,即外出父母、监护人、学校、大众传媒。 相似文献
7.
王贵华 《读与写:教育教学刊》2011,(9):10-11
Extensive reading is usually regarded as the major way of input for English language learners in universities.However,the extensive reading course has always been suffering from unfair treatment and under severe criticism for many problems.This article aims to uncover the problems with the institutional part,teachers and students.Corresponding solutions are proposed to tackle the identified problems. 相似文献
8.
Henry T. Ingle 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1986,32(3):251-267
The research, theory and practice of educational technology over the past 75 years provide convincing evidence that this process offers a comprehensive and integrated approach to solving educational and social problems. The use of media and technology in development has shifted from an emphasis on mass media to personal media. A variety of electronic delivery systems are being used and are usually coordinated by centralized governmental agencies. There are no patterns of use since the problems vary and the medium used is responsive to the problem. Computers are used most frequently and satellite telecommunication networks follow. The effective use of these and other technologies requires a long-term commitment to financial support and training of personnel. The extension model of face-to-face contact still prevails in developing nations whether in agriculture, education or rural development. Low-cost technologies are being used in local projects while major regional and national companies use radio, film and related video technologies. The use of all available and cost-effective media and technologies make possible appropriate communications for specific goals with specific audiences. There appears to be no conflict among proponents of various media formats. Development in education and other sectors has much to gain from old and new communication technologies and has hardly been tapped. Several new educational technology developments are discussed as potential contributors to formal and nonformal education. 相似文献
9.
龙叶明 《湖南广播电视大学学报》2009,(3):60-62
我国媒介市场处于快速发展时期，但媒介人力资源管理存在的问题成为制约我国媒介发展的瓶颈。认识我国媒介人力资源管理的现状，找出媒介人力资源管理的难点和热点问题，以及能否创造性地提出解决问题的办法，是各媒介的当务之急。 相似文献
10.
INTRODUCTION Functionally graded materials (FGM) possesselastic constants and density that vary gradually withlocation within the material. In one kind of FGM,only the elastic constants vary continuously along oneor more directions, and in the other kind, only thedensity varies gradually with location. We call thelater one density functionally graded materials. Functionally graded materials have attractedmuch interest. Tutuncu and Ozturk (2001) obtainedclosed-form solutions… 相似文献
11.
In this paper, the specific solutions of orthotropic plane problems with body forces are derived. Then, based on the general solution in the case of distinct eigenvalues and the specific solution for density functionally graded orthotropic media, a series of beam problem, including the problems of cantilever beam with body forces depending only on z or on x coordinate and expressed by z or x polynomial is solved by the principle of superposition and the trial-and-error method. 相似文献
12.
印尼华文教育的现状、问题及对策 总被引：6，自引：7，他引：6
本文以实地调查研究为基础,报告了当前印尼华文教育在办学形式、学生构成、教师规模及构成、教材、语言环境与大众传媒、推动力量等方面的现状和问题,并就进一步搞好印尼华文教育提出了对策和建议.文章认为,印尼华文教育的发展方向应该是:办学形式正规化,学习人员多样化,从教人员职业化. 相似文献
13.
研究共振条件下的一类椭圆边值问题,利用临界点理论中的Morse理论方法,通过计算零点和无穷远处的临界群,根据Morse不等式,得到该方程两个非零解的存在性. 相似文献
14.
任晓华 《天津职业院校联合学报》2006,8(2):123-126
数学中条件、运算和目标的关系,是重要的主从关系。通过解题方法感悟条件在解题过程中的巧妙使用,凸显条件的重要作用;通过解题思路的剖析,表明出现解题错误往往是条件使用不当所致,从而彰显条件的重要地位;通过解题手段的变化体验深刻理解条件的内涵对解题的有益帮助。 相似文献
15.
Anne C. Kroon Martine van Selm Claartje L. ter Hoeven Rens Vliegenthart 《Educational gerontology》2013,39(12):818-834
ABSTRACTAlthough workforce aging is among the major challenges facing developed countries, organizational communication about this issue has received little scholarly attention. Drawing on a content analysis of corporate media, we reconstruct how Dutch organizations (N = 50) framed older workers’ employability during the period 2006–2013 in diagnostic (problem-definitions) and prognostic (solution-definitions) terms, and we trace the influence of corporate media types and organizational characteristics on these frames. Results reveal that organizations frequently highlight problems on the macrolevel (societal) and the mesolevel (organizational), while most solutions are located on the microlevel (individual). Using multilevel modelling, we found support for the expectation that the issue is more strongly problematized in internal compared to external corporate media, and that problems related to individual older employees are most pronounced in public sector organizations’ communication. Our findings highlight diverse ways in which organizations can communicatively address factors that hamper older workers’ employability. 相似文献
16.
大学英语教学中存在着四种常见的互文性：文化互文性、体裁互文性、媒体互文性和教师言语互文性,分析以上四种互文现象,能够看出互文性教学模式在大学英语教学中的重要意义。通过探讨这一模式具体的实践方式,可以发现实际教学中遇到的困难,并在此基础上尝试提出解决方案,以期为大学英语教学模式的探索提供新的思路。 相似文献
17.
随着认知隐喻研究的不断深入,越来越多的学者重视采用在线实证方法开展研究。近年来,相关研究虽然数量大幅度增加,但由于存在研究材料、方法或手段的局限,很多研究结果差异很大,甚至大相径庭,因此需要更深入的探讨。本文在对国内外相关在线研究进行综述的基础上,找出了产生上述问题的原因,并提出了相应的建议。 相似文献
18.
高校现代教学媒体使用现状调查分析 总被引：8，自引：0，他引：8
调查显示,多媒体教学在取得较大成果的同时存在声音曹杂、画面不清晰、光线过暗、不利于传统教学方法和多媒体教学相结合等问题,从而导致学生学习效率低下。因此,我们应认真分析造成此现象的主要原因,并采取投资侧重于音视频效果、分类建设多媒体课室、采用新型技术等相应的解决方法。 相似文献
19.
班级党支部是新时期高校学生党建工作的一种创新.在班级党支部建设过程中,通常会面临一些新的问题,如:何时组建班级党支部最为合适,如何正确处理班级党支部与团支部、班委会的关系,怎样检验班级党支部建设的成效,如何给予班级党支部以必要的指导,本文对上述一系列问题作了一些粗浅的分析与思考. 相似文献
20.
Fostering organizational change through deliberations: the deliberative jury in a university setting
Universities in Europe face a variety of reform initiatives, and university reform can be seen as a wicked problem that should be resolved through collaborative efforts. In Finland, there has been considerable resistance to proposed reforms, with university personnel complaining that they have not been heard. Students, on the other hand, seem reluctant to participate in the debate. The situation does not lend itself to the collaborative resolution of wicked problems. Organizational changes are liable to failure, if wicked problems are not addressed effectively. This article presents a deliberative jury method in a university setting as a participative way to solve wicked problems and to pave the way for change. The method is tested through two cases in a Finnish university. These cases suggest that students and staff working together can devise and explore more comprehensive solutions to wicked problems, overcome the participation dilemma and generate change in their organization. 相似文献