排序方式: 共有102条查询结果,搜索用时 15 毫秒
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通过问卷调查结合访谈和观察,对石河子市小学科学课程学与教的现状进行调查,结果发现:学生对科学课具有浓厚的兴趣,且非常喜欢现行的教材,但因本区小学科学教师师资不足、专业素养不高,加之教学设备有限,教学资源匮乏,多数学校班级规模过大,导致实践环节得不到保障,影响了课程教学质量。据此,强化小学科学教师队伍建设,加大科学教育经费的投入力度,缩减班级规模,改善学习环境,是本区适应新课改提高科学课程教学质量的有效途径。 相似文献
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Alex Wellerstein 《The Nonproliferation Review》2013,20(1):93-97
ABSTRACTGraham Farmelo's new book on the early British nuclear weapon program assembles a fascinating cast of characters in a gripping narrative. It particularly succeeds at illustrating the importance of “atomic energy” imagery in the United Kingdom well before the discovery of fission, and provides nuanced insights into Churchill's handling of issues relating to the atomic bomb and scientific expertise. However, in arguing that the British had a “lead” on the manufacture of atomic bombs that was “lost” to the United States during the early Manhattan Project, the book overstates its case, and in the process misunderstands what it took to make the bomb. 相似文献
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Vipul Dutta 《战略研究杂志》2019,42(5):600-625
ABSTRACTThis paper focuses on the twentieth century administrative and institutional history of the ‘Indian’ Staff College. This institutional focus on the Staff College helps reveal the political, military and intellectual fault lines that have intersected with the processes of military institution-building in India. By focussing on the administrative challenges of the Staff College, I am to chart the historical development of the practices which have undergirded the delivery of professional military education on the subcontinent. 相似文献
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Thomas W. Lucas W. David Kelton Paul J. Sánchez Susan M. Sanchez Ben L. Anderson 《海军后勤学研究》2015,62(4):293-303
Decades ago, simulation was famously characterized as a “method of last resort,” to which analysts should turn only “when all else fails.” In those intervening decades, the technologies supporting simulation—computing hardware, simulation‐modeling paradigms, simulation software, design‐and‐analysis methods—have all advanced dramatically. We offer an updated view that simulation is now a very appealing option for modeling and analysis. When applied properly, simulation can provide fully as much insight, with as much precision as desired, as can exact analytical methods that are based on more restrictive assumptions. The fundamental advantage of simulation is that it can tolerate far less restrictive modeling assumptions, leading to an underlying model that is more reflective of reality and thus more valid, leading to better decisions. Published 2015 Wiley Periodicals, Inc. Naval Research Logistics 62: 293–303, 2015 相似文献
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We consider a parallel‐machine scheduling problem with jobs that require setups. The duration of a setup does not depend only on the job just completed but on a number of preceding jobs. These setup times are referred to as history‐dependent. Such a scheduling problem is often encountered in the food processing industry as well as in other process industries. In our model, we consider two types of setup times—a regular setup time and a major setup time that becomes necessary after several “hard‐to‐clean” jobs have been processed on the same machine. We consider multiple objectives, including facility utilization, flexibility, number of major setups, and tardiness. We solve several special cases assuming predetermined job sequences and propose strongly polynomial time algorithms to determine the optimal timing of the major setups for given job sequences. We also extend our analysis to develop pseudopolynomial time algorithms for cases with additional objectives, including the total weighted completion time, the total weighted tardiness, and the weighted number of tardy jobs. © 2012 Wiley Periodicals, Inc. Naval Research Logistics, 2012 相似文献
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黎松涛 《兵团教育学院学报》2012,(2):60-63
本文在总结学前教育专业实际钢琴技能课教学的基础上,通过对钢琴技能课的教学反思,从提高对钢琴技能课学习的认识,加强学前教育专业钢琴技能学习的角度出发,提倡立足传统教学,勇于教学创新,开拓思路,探索灵活多样的授课形式,整合教学资源,研究新教材、探索新教法,立足于学前教育的专业特点,注重学前教育专业键盘技能的实际运用,并建立科学、可行的学前专业技能考核标准,从而促进学前专业音乐技能课的发展。 相似文献
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唐梦楠 《中国人民武装警察部队学院学报》2006,22(4):55-56
当代西方文化使青少年开拓了视野,形成了许多新的思想观念;同时,也误导了年轻人的生活态度、信仰、社会责任感等。对待西方文化,我国青少年应当在清晰的理解和认识的基础上,取其精华,去其糟粕。 相似文献
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西部贫困地区农村中小学信息技术教育存在哪些问题,如何解决发展中遇到的难题、进一步促进其发展,这是我们提高西部贫困地区农村教育质量和人口素质关键所在。 相似文献