This returning on one side provides students with complex and open problems of the real life world, on the other side, no longer only emphasizes indirect experience but begins to emphasize the dynamic balance between indirect and dire ct experiences 其回归主要表现在两个方面,其一是向学生提供关于现实世界的、复杂且开放的问题,其二是由重间接经验转向实现间接经验与直接经验的动态平衡。
Since composition does not satisfy substitutivity with respect to-bisimulation, ccs is established and some properties of-bisimulation in ccs _ are introduced . this paper pays attention to ccs _ and an open problem appeared in literature concerning the modal logical characterization of-bisimulation in nomal case 由于在复合下-互模拟不能保持同余性,文献中引入了ccs_,并初步讨论了-互模拟在ccs_中一些有用的性质。
Abstract : in this paper, we review the state of genetic algorithm research from the perspective of applications, design of genetic algorithms and theoretical analysis, and introduce some convergence models of the genetic algorithms . a series of open problems on genetic algorithms is also included 文摘:对遗传算法的应用、算法设计和理论分析等方面的发展现状进行了综述和评论,介绍了几种遗传算法的收敛模型,指出了遗传算法理论研究中一些有待解决的问题
In chapter 3, first we answer the open problem of williams ( 1979 ) . we solve the problem completely when q-matrix is totally stable or uni-instantaneous, that is, we not only prove the existence of q-function but also identify the q-function . second, for invariant distribution of jump processes, we also obtain some good results 第三章首先回答了williams(1979)开问题,对q-矩阵为全稳定和单瞬时情形,完整的解决了该问题,也就是说,不仅证明了q-函数的存在性,而且还把具体的q-函数构造出来了;其次对跳过程的不变分布,也得到了很好的结果。
Roughly speaking, we have dealt with work as follows : ( i ) try to use a kind of new method to investigate the global asymptotic stability of difference equation; ( ii ) solve several " open problems and conjectures " in an international journal; ( iii ) point out and correct some wrong work existing in two famous international journals; ( iv ) improve many known results 尝试使用一种新的方法研究有理型差分方程全局渐近稳定性;2解决一国际期刊上提出的几个“公开问题与猜想”;3指出并改正两家著名国际刊物上论文中的错误;4
Toward the investigating and analyzing reasons ( 2 ), ( 3 ), the fifth part puts forward three kinds of tactics of open problems teaching of mathematics : permeating tactics; subject tactics; and meta-cognition tactics, and combines these three kinds of tactics and put out the case of open problems teaching of mathematics 第五部分主要针对调查分析的原因、,提出数学开放题教学的三种策略:渗透策略、主体策略和元认知策略,并结合这三种策略,举出了数学开放题教学的案例。
Toward the investigating and analyzing reasons ( 2 ), ( 3 ), the fifth part puts forward three kinds of tactics of open problems teaching of mathematics : permeating tactics; subject tactics; and meta-cognition tactics, and combines these three kinds of tactics and put out the case of open problems teaching of mathematics 第五部分主要针对调查分析的原因、,提出数学开放题教学的三种策略:渗透策略、主体策略和元认知策略,并结合这三种策略,举出了数学开放题教学的案例。
The fourth part investigates the teaching situation of open problems through the forms such as questionnaire and interview etc, believes the teaching situation of open problems is not optimistic at present, and analyses four reasons : ( 1 ) important guide effect of high school and college entrance examination; ( 2 ) open problems teaching has no regular operation mode, and requires teacher has high quality; ( 3 ) ready-made open problems that suit mathematics teaching is less, and teachers " ability to design open problems is relatively poor; ( 4 ) open problems teaching requires teachers to have open teaching ideas, and most teachers still stick to past teaching ideas 第四部分通过问卷及访谈等形式调查了数学开放题的教学情况,认为目前数学开放题教学情况不令人乐观,并分析了其中的四点原因:中、高考的重要导向作用;数学开放题教学没有固定的操作模式,要求教师具有较高的素质;适合数学课堂教学的现成的开放题较少,而教师编制开放题的能力较差;数学开放题教学要求教师要有开放式的教学观念,而大多数教师仍抱守旧有的教学观念。
The fourth part investigates the teaching situation of open problems through the forms such as questionnaire and interview etc, believes the teaching situation of open problems is not optimistic at present, and analyses four reasons : ( 1 ) important guide effect of high school and college entrance examination; ( 2 ) open problems teaching has no regular operation mode, and requires teacher has high quality; ( 3 ) ready-made open problems that suit mathematics teaching is less, and teachers " ability to design open problems is relatively poor; ( 4 ) open problems teaching requires teachers to have open teaching ideas, and most teachers still stick to past teaching ideas 第四部分通过问卷及访谈等形式调查了数学开放题的教学情况,认为目前数学开放题教学情况不令人乐观,并分析了其中的四点原因:中、高考的重要导向作用;数学开放题教学没有固定的操作模式,要求教师具有较高的素质;适合数学课堂教学的现成的开放题较少,而教师编制开放题的能力较差;数学开放题教学要求教师要有开放式的教学观念,而大多数教师仍抱守旧有的教学观念。
The fourth part investigates the teaching situation of open problems through the forms such as questionnaire and interview etc, believes the teaching situation of open problems is not optimistic at present, and analyses four reasons : ( 1 ) important guide effect of high school and college entrance examination; ( 2 ) open problems teaching has no regular operation mode, and requires teacher has high quality; ( 3 ) ready-made open problems that suit mathematics teaching is less, and teachers " ability to design open problems is relatively poor; ( 4 ) open problems teaching requires teachers to have open teaching ideas, and most teachers still stick to past teaching ideas 第四部分通过问卷及访谈等形式调查了数学开放题的教学情况,认为目前数学开放题教学情况不令人乐观,并分析了其中的四点原因:中、高考的重要导向作用;数学开放题教学没有固定的操作模式,要求教师具有较高的素质;适合数学课堂教学的现成的开放题较少,而教师编制开放题的能力较差;数学开放题教学要求教师要有开放式的教学观念,而大多数教师仍抱守旧有的教学观念。