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孙小玲 《新课程学习(社会综合)》2011,(3)
班级是学校教育教学工作的基本单位,是学校中学生集体的基层组织,班主任是班集体的组织者、领导者和教育者,是对学生进行思维教育的主要力量.一个初中教学班几十位同学,来自不同的学校,不同的家庭环境,为了一个共同的学习目标走到了一起,组成了一个班集体.要使这几十位同学心往一处想,劲往一处使,真正成为一个名副其实的优秀班集体,则需要全体同学及班主任的共同努力才能完成. 相似文献
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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
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高校档案“五化”建设，就是指高校档案“资源信息化、管理理现代化、服务社会化、人才专业化、工作法制化”。“十一五”期间，是高校档案建设的黄金发展期，如何抓住机遇，迎接挑战，笔者以为，从长远的战略高度考虑，应该把高校档案“五化”建设作为“十一五”高校档案建设的重点，积极推进，抓紧实施。 相似文献
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孙小玲 《第二课堂(小学)》2010,(9)
一、be used to do sth该结构中的be used实际上是为动词used的被动语态,其意为被用来。由于use...to do sth的意思是用……做某事,所以be used to do sth的意思就是被用来做某事。比较:A clock is used to tell us the time.钟是用来告诉我们时间的。→We uses a clock to tell us the time.我们用钟来告诉我们时间。A tooth 相似文献
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In this paper, the discrete mean-variance model is considered for portfolio selection under concave transaction costs. By using the Cholesky decomposition technique, the convariance matrix to obtain a separable mixed integer nonlinear optimization problem is decomposed. A brand-and-bound algorithm based on Lagrangian relaxation is then proposed. Com-putational results are reported for test problems with the data randomly generated and those from the US stock market. 相似文献
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朊病毒是由一种分子量为33—35kD的正常细胞蛋白PrPC发生构型转变形成的结构特殊的蛋白质分子,具有可滤过性、传染性、致病性、对宿主范围的特异性等常规病毒的生理特性,但它要比已知的最小的常规病毒还要小得多,且其复制过程不符合分子生物学的中心法则。作为一类新的病原体,它能引起人和动物的许多重要疾病,因此对其生物学特性、致病机理等的深入研究将为控制这类疾病提供重要的理论依据、 相似文献