复变函数中的反例     

许秀珍 《安徽教育学院学报》2005,23(6):10-11,17

构造、汇集了复变函数中的部分反例,揭示了不同数域内平行概念间的本质差异.  相似文献   

一个小波域数字水印算法     

黄松  陈军  杨华千 《重庆第二师范学院学报》2006,19(3):35-37

提出了一个新的DWT域数字水印算法。该算法利用双密钥调制方法,在载体图像的低频子带嵌入置乱水印,水印提取不需要原始图像。实验结果表明水印具有良好的鲁棒性和不可见性。  相似文献   

高等教育学的“捉摸不定”与“再学科化”的致思     

张成林  杨翠 《黑龙江高教研究》2020,(1):13-16

党的十九大报告提出了"建设教育强国"的战略决策,高等教育既是国家教育体系框架中的关键节点,又是高等教育学的研究载体。高等教育学"捉摸不定"凸显出"硬实""软性""柔情"的层级序列。高等教育学的"硬实"彰显于学科的嬗变历程与逻辑进路,源于学科地位、研究成果、研究队伍与学术精英等结构谱系。高等教育学的"软性"显露了弱化危机,涉及学科逻辑紊乱、解码能力内隐、发展潜力匮乏,外显在主体自我迷失和学科功能异化上,内涵式发展可谓举步维艰。高等教育学的"柔情"始终以"人"为核心进行教育向度的意义生成,促成学科想象力,继而凸显文化情怀和学科魅力。高等教育学的迷惘体现于无坚实的学科"根基",用物性逻辑代替学科逻辑,出现了价值回溯和实践流弊的倾向。高等教育学要正视其研究领域的"多重复杂性"与"不确定性",弥合动态嵌套的层级序列系统,在高等教育的价值证成和通达路径过程中实现学科重构。  相似文献   

A CHASE domain containing protein kinase OsCRL4,represents a new AtCRE1-like gene family in rice     

韩秋敏  姜华武  齐晓朋  于洁  吴平 《Journal of Zhejiang University. Science. B》2004,(6)

INTRODUCTION Cytokinins play a major role in many differentdevelopmental and physiological plant processes,such as cell division, regulation of root and shootgrowth and branching, chloroplast development,leaf senescence, stress response and pathogen re-sistance (Mok and Mok, 2001). Significant ad-vances have been achieved in our understanding ofcytokinin signaling, providing important insightsinto the molecular partners involved (Hutchisonand Kieber, 2002; Sheen, 2002). It had been…  相似文献   

复杂感知网络风险控制算法的设计     

林清 《九江职业技术学院学报》2020,(1):15-16

承载了大数据业务的复杂感知网络在满足业务接入的同时如何应对网络节点面临的业务失效风险,已成为业界研究的热门问题。风险控制算法克服了传统算法在实施风险评估时对节点较高的依赖性。风险控制算法通过构建数学模型为展开信息域参数的计算和更新,并制定筛选策略来锁定潜在风险的异常业务质量(QoS)目标节点。经验证,该算法具有良好的可行性。  相似文献   

替代对偶算法求解多约束非线性背包问题     

孔珊珊  孙小玲 《上海大学学报(英文版)》2007,11(4):340-343

Multi-dimensional nonlinear knapsack problems are often encountered in resource allocation, industrial planning and computer networks. In this paper, a surrogate dual method was proposed for solving this class of problems. Multiply constrained problem was relaxed to a singly constrained problem by using the surrogate technique. To compute tighter bounds of the primal problem, the cutting plane method was used to solve the surrogate dual problem, where the surrogate relaxation problem was solved by the 0-1 linearization method. The domain cut technique was employed to eliminate the duality gap and thus to guarantee the convergence of tile algorithm. Numerical results were reported for large-scale multi-dimensional nonlinear knapsack problems.  相似文献   

Positive beliefs about errors as an important element of adaptive individual dealing with errors during academic learning     

Maria Tulis  Gabriele Steuer  Markus Dresel 《教育心理学》2018,38(2):139-158

Research on learning from errors gives reason to assume that errors provide a high potential to facilitate deep learning if students are willing and able to take these learning opportunities. The first aim of this study was to analyse whether beliefs about errors as learning opportunities can be theoretically and empirically distinguished from adaptive reactions to errors in an affective-motivational sense (including the maintenance of motivation and activating emotions), and in terms of learning behaviour and metacognitive activities specifically adjusted in response to a specific error. The second aim was to validate the proposed distinction across different domains. The third aim was to investigate the added value of beliefs about errors besides domain-specific self-concept and mastery goal orientation for understanding the preconditions for adaptive reactions to errors at school. We assessed all variables in three different school subjects (N = 614 students, Grades 5–7). Confirmatory factor analyses indicated distinctness and a moderate domain specificity of error-related reactions. Positive error-related beliefs predicted students’ affective-motivational and action adaptivity of error reactions, above and beyond self-concepts and goal orientations. Taken together, the current findings provide a more complete understanding of the intra-personal mechanisms of adaptive responses to errors in different school subjects.  相似文献   

论函数的奇偶性     

胡大勇 《重庆职业技术学院学报》2006,15(1):161-162

奇偶性是函数性质中最重要的一种。正确掌握函数的奇偶性,运用奇偶性来判断函数的单调性和作用,是学生学习函数的一个重要内容,并有助于学生对函数的奇偶性的理解和把握。  相似文献   

中国社会转型时期关于价值本位的定义域思考     

姜国峰  李敏 《保山师专学报》2007,26(6):21-23

价值观念在人的生活中占据着重要的地位,它渗透于社会生活的方方面面,折射出人的各个方面的矛盾和冲突。而对于中国社会转型的特殊时期,社会价值本位的不稳定性使我们有必要再度对之进行进一步的思考和探索,以尽量得出一个符合社会发展和人类利益的社会价值本位的判定。  相似文献   

"数学概念学习中的错误分析"之分析     

徐文彬 《数学教育学报》2004,13(1):45-47

对数学概念学习中的错误做调查分析,不能仅局限于调查所得的具体数字或数据,更要明确,调查中所设计问题的论域,并结合具体的语境,对作为社会行动者的学生之响应做出合情合理的分析与建议.从逻辑学的视角来看,任何问题或提问都预设该问题或提问所涉及的范围,即论域.从社会心理学的视角来看,当学生“遭遇”要其回答的“问题”时,他或她总是要采取某种“行为”以作为响应.从应用语言学的视角来看,对于一个概念或语词的学习与理解总是在这个概念或语词的具体使用中进行的.  相似文献