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1.
Min Jiang ;Li-Na Chen ;Jin He ;Guang-Yao Chen ;Chong-He Li ;Xiong-Gang Lu 《上海大学学报(英文版)》2014,(3):265-274
The study of controlled rolling/controlled cooling process parameters which affect the microstructure and mechanical properties of a novel pipeline steel has been optimized by the orthogonal experiment with four factors and three levels in this paper. However, the parameters of thermo-mechanical control process （TMCP） optimized by the Gleeble-3500 hot simulator could not satisfy performance requirements of the X100 pipeline steel. In order to improve the performance of this steel, the influence of finish cooling temperature （FCT） on the microstructure and property is studied in detail. It is found that, as this steel is thermo-mechanically treated by this set of parameters （the start heating temperature, finish rolling temperature （FRT）, FCT and cooling rate of 1,180 ℃, 810 ℃, 350 ℃ and 35 ℃/s, respectively）, the micro- structures are mainly composed of granular bainite （GB） and acicular ferrite （AF）. The effective grain sizes are below 20 μm; the steel reaches the optimal balance between the strength and the toughness; the yield strength is 695 MPa; the tensile strength is 768 MPa; the elongation is 16.6 %; the impact energy is 262 J at room temperature. All indexes could meet the requirements of X100 pipeline steel. 相似文献
2.
龚发兴 《宁德师专学报(自然科学版)》2008,20(1):86-88
提出关注化学教学情境创设,能培养学生创新和独立解决问题的能力,诱发学生创造想象的兴趣和动机,进而培养学生的变通能力,从而有效的提升教学效率． 相似文献
3.
HUANG Chien-ern YUAN Young HUANG Chien-fu 《美中教育评论》2008,5(7):1-12
Technological and vocational education has played a very important role in the development of Taiwan＇s economy. The purpose of this research is to examine the determinants of competitiveness with a focus on differences between public and private institutions in Taiwan＇s HTVE system. Determinants of internal and external factors were identified, and a competitiveness index was established. Results found that faculty teaching performance and completeness of curriculum design were the major determinants of internal factor. Financial support from government was the most influential determinant of public institutions in external factor, yet private institutions considered population growth rate was the most important one. Despite of top 3 institutions of both types, private universities seem possess relatively more competitive advantages than their public counterparts, and public colleges seem possess relatively more competitive advantages than their private competitors. 相似文献
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Laser welding is an established manufacturing technology for a large variety of automotive applications due to its attractive properties such as low heat input, high precision and fast welding speed. Especially when welding high strength steels, which are dominantly used in today＇s car body construction, the low heat input by laser welding bears significant advantages with regard to the properties of the weld seam. The exploitation of the full application potential of laser welding in mass production requires an appropriate manufacturing concept and corresponding auxiliary technologies. The present paper demonstrates the integration of laser welding into the surrounding manu- facturing concepts by a modular setup with different levels of automation. This approach offers flexible solutions for individual needs thereby optimizing investment cost, labor cost and productivity. Recently available laser sources enable exceptionally high welding speed on thin gauged sheet metals but require efficient material handling con- cepts to utilize the full speed potential. Industrial concepts are presented offering efficient material handling and high process robustness for mass production welding. 相似文献
5.
Ruben Jans Ria Bollen 《美中教育评论》2008,5(7):36-40
Employees in technical firms, like garages, need more and more formations. Due to the very fast innovation in technology, lifelong learning is a real need for these labour forces. On the other hand, there are the needed formations very specialized and expensive. Another problem employers faced in these economical sectors in Western Europe is the lack of candidates. Also in secondary education schools, the wide interest for these formations is decreasing. One of the factors causes this problem is that schools don＇t have enough money for investing in new and high-tech machines. Therefore two interreg projects were submitted and approved for financing. Interreg is an initiative of the European Union meant for the permanent development of the ＂European Space＂. The third phase of interreg means enhancing the economic and social cohesion within the European Union. In this paper, we describe two successful projects, namely Autoweb and V@K, which try to help employers, employees, schools and students to keep up with the high-tech innovations with a workplace-based e-learning program. 相似文献
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在学科交叉前沿认清理工类专业高年级本科生科研素质培养的重大意义,打破跨学科融合的壁垒,将阶梯式教学模式与"观、描、量、析"实践教学法合理运用于教学培养之中,为高年级本科生搭建科研学习与实践的"教学—项目—研究—交流"互动平台,并引入教师评价与学生评价相结合的科研能力多元评价体系,发掘学生的学术科研潜能,构建了学科交叉视域下高年级本科生科研素质培养模式,完善了基于多学科融合的学生科研培养机制,培养具有创新精神和科学创造力的多学科交叉复合人才来满足国家未来的发展要求。 相似文献
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陈智华 《宁德师专学报(自然科学版)》2007,19(3):319-321
学生作为教学活动的主体，理应成为教研工作的参与者．根据“学生代表参与评课”和“师生交流会”开展教学研究的实践、总结与分析，探讨了学生参与教研的形式与效果，为学校教研工作的有效开展提供借鉴． 相似文献
8.
Awoleye O. Michael Siyanbola W. Owolabi Ogundari O. Ibikunle 《美中教育评论》2008,5(10):26-33
Now that the readiness of students in Nigeria higher institutions regarding e-learning have been established in a previous work （Awoleye ＆ Siyanbola, 2007） there is also a need for evaluation of teachers＇ skills vis-a-vis their preparedness towards online teaching. This work therefore measured both technical and attitudinal capacity （Pillay, et al., 2006） of the teachers across the institution types （the Universities, Polytechnics and Colleges of education）. In the overall, intensity of computer access is better than Internet access in all the institution types and the intensity of Intemet access is better than personal office connectivity. Although there are varied levels of access relative to institution types, Nigerian university teachers have better access to computer （98.4% of all respondents） and the Internet （94.8% of all respondents） than their counterparts in the polytechnics and colleges of education. Furthermore, computer access is better in the polytechnics （96.4%） than in the Colleges of Education （87.7%）. Further measurement with bias for age on teachers＇ technical proficiencies revealed that there would be no threat for continuity if online teaching were to be adopted. The research further showed that after the passage （which may be due to retirement） of the teachers who are over 50 years old, there are teachers between 41-50 years who will take over, thereby removing the burden of succession. Based on a number of issues identified, the research suggests some useful policy directions, which wilt enhance the use of computer and the Internet to facilitate teaching and learning in the institutions. 相似文献
9.
Darra Pace Diane Schwartz 《美中教育评论》2008,5(12):20-26
The inclusion of students with disabilities at the university is a relatively new occurrence in the field of special education. Although legislation in the United States has supported the acceptance of students with disabilities at the post-secondary level, it has only provided minimal support with the emphasis on the learner rather than the curriculum. Now we are looking for multiple ways for students to access learning and demonstrate mastery. Universal Design for Learning （UDL） is currently seen as a means to reconceptionalize curriculum. This study examines the experience of four professors and their effort to use a Classroom Performance System （CPS） as part of reformatting their courses using UDL. The Center for Applied Special Technology, CAST （2001） states that the goal of Universal Design for Learning is to develop teaching methods that enable all students with diverse learning needs, including those with disabilities and cultural differences, to have equal access to classroom curriculum. This paradigm shift echoes the move in special education from a deficit model to a minority rights model put forward by Hahn （1989）, and which is the basis of inclusive educational philosophy. Together inclusion and UDL create learning environments that strive to serve all students. This research describes the implementation of clickers as part of the CPS program in college courses in a special education teacher preparation program. The case study demonstrates how technology can provide access for all learners with positive outcomes such as increased participation and application of knowledge. It also illustrates some of the difficulties in making this pedagogical paradigm shift particularly in the use of technology, and the value of overcoming the existing barriers in place. 相似文献
10.
Christian Harteis Tina Koc Barbara Morgenthaler 《美中教育评论》2008,5(1):68-80
Intuition usually is defined as the capability to act or decide appropriately without deliberately and consciously balancing alternatives, without following a certain rule or routine, and possibly without awareness （Gigerenzer, 2007; Hogarth, 2001; Klein, 2003; Myers, 2002）. It allows action which is quick （e.g. reaction to a challenging situation） and surprising, in the sense that it is extraordinary in performance level or shape. This paper reports theories of intuition and their empirical evidence in the field of professional work. It aims at reporting the state of research on intuition, discussing the relevance of different approaches for analyzing work performance, and describing challenges for future empirical research in the domain of professional working life. 相似文献
11.
Dennis Ping-Cheng Wang 《美中教育评论》2008,5(9):32-41
Movement activities can be used to integrate with any other curriculum in childhood education. The movements can inspire the sense of rhythmic concepts for children. This study aims at investigating how children can be motivated and inspired rhythmically by body movement through Dalcroze approach. In this research, the author revealed how physical movements can motivate children＇s potential sense of rhythm and inspire children＇s interest of musical rhythmic concepts learning. The study was conducted with 1000 primary school 6th grade students from twenty primary schools in Taipei, Taiwan. These 1000 6th grade students have the same age, same music syllabus and have equally same music training at their schools. The 1000 students were divided into two equal groups, one having different activities of body movements at school, and the other without. The different activities included tapping, swinging, clapping, turning, and stamping simple rhythms. The experiments consisted two parts which were rhythm dictation and improvisational skills. All the participants were equally given the pre-test and post-test as evidences of progress of the experiment, and the researcher then compared with the differences of the two tests of the two groups before and after the experiment to see if there were any progress in their learning of musical rhythms. The study lasted 6 months and consisted of three stages： observation, comparison, and analysis. The author observed and compared the two groups of students, analyzed the results and found out that the two groups demonstrated obvious differences in their degree of progress on learning of musical rhythms. 相似文献
12.
YANG Xi-yao WU Yong-an 《美中教育评论》2008,5(9):50-54
The study was to investigate the vague words measurement across native and non-native English speakers and gender differences. Ninety-two students from the University of Oklahoma participated in this study by filling out an internet-based questionnaire on the vague words. The researchers put each of the thirty-two vague words in a context, or the same word put into different contexts. The participants were asked to rate the degree or the numerical value that they thought was the most appropriate in the context of the vague word. It was found that ten out of the thirty-two words had a significant difference across the native and non-native English speakers, and two of thirty-two words had a significant difference across genders. The word ＂fairly＂ showed the most significant difference interactions of language speaking by gender. 相似文献
13.
阮幼丽 《宁德师专学报(自然科学版)》2008,20(2):213-215
由于基础设施的限制,农村中学学生视野较窄,但他们所处的生活环境中生物资源丰富多彩．农村中学生物教学可利用得天独厚的自然资源,促进教学,激发学生的学习兴趣,引导学生更好地学习生物,认识生物资源与人们生活的密切关系,促进学生的资源保护意识,培养高尚的情操。 相似文献
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概念图在高中生物复习总结中应用的初探 总被引：1，自引：0，他引：1
陈敏 《宁德师专学报(自然科学版)》2008,20(1):92-94
高中生物复习课教学是师生双方从新的视角对所学知识进行系统梳理、深化、拓宽及灵活应用的教与学的过程．应用概念图可以有效地组织课程内容,激发学生自主构建生物学知识体系,使知识概括化、网络化,并能灵活地迁移． 相似文献
16.
随着高校毕业生总量逐年增长和结构性用工矛盾的不断突显,未来几年,我国就业形势的严峻性将常态化。中国石油大学(北京)的石油石化行业特色型专业,虽保有较高的就业率,但逐年走低的就业行情也使主干专业面临一定的就业隐忧。高校应对接市场需求,准确把握地区就业政策,结合学科发展特点和行业用工标准,及时优化和调整人才培养模式;大学生应灵活调整就业思路,转变择业观念,化危机为转机。本文在分析就业市场大环境的基础上,探索基于行业需求和地区政策的勘查专业人才培养之路。 相似文献
17.
当今,大学生利用假期来到教学资源相对贫乏的偏远山区进行支教已成为大学生回报社会的途径之一。在支教逐渐被大众广泛接受的社会背景之下,提升支教项目的系统性和专业性就成为了更多支教团队追求的目标。本文将以中国地质大学(北京)学生英语专业支教实践为实例,从团队建设、前期备课、宣传工作、教学实践四个方面分析支教规范性建设的新思路,为大学生支教项目的进一步发展提出更好的实施方案。 相似文献
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A combined numerical model of thermal field and the primary dendrite arm spacing （PDAS） was proposed to correlate the process parameters and PDAS in laser welding of Cu and A1. The solidification parameters simulated by the finite volume method with commercial software ANASYS FLUENT were applied in the PDAS model to predict the dendrite arm spacing of fusion zone. Dendrite was also examined by the metallographic method to validate the model. Results indicate that the calculated PDAS agrees with metallographic measurements reasonably, especially the Hunt model. PDAS increases apparently with increasing laser power while decreases slightly with increasing welding speed. Increasing laser power increases the secondary dendrite and increasing welding speed increases the microporosity in dendrite. 相似文献
20.
DONG Xiao-hong 《美中教育评论》2008,5(1):23-26
The main developed countries raise higher educational funds actively by increasing the tuition fees, improving the rate of loan, striving for scientific research funds, improving the income of education and service as well as accepting all kinds of donations. According to Chinese realities, it should be increased higher educational funds to ameliorate the tense situation by increasing the earned income of the colleges and universities, accepting the donation from alumni or enterprises, developing the education trade, collecting tuition fees reasonably, making full use of credit funds and striving for the financial aid of the international education and the loan from students. 相似文献