BCH-代数与广义结合BCI-代数的关系

利用BCH－代数的理想给出了BCH－代数的商代数的一种定义方法，同时证明了BCH－代数的商代数是一个广义结合BCI－代数。     

对弱势群体精神世界的解读--评中篇小说《乡徙》

《乡徙》中女主人公由一个把生存需要看成人生第一要义的人，由一个丧失了自主性与自觉性的“异化”的人，成长为追求自我价值实现的人，具有精神独立性的、努力进行自我拯救的人，作品的这种展示无疑具有现实意义。但是作品在对这一新的社会弱势群体的精神剖析上存在着价值判断的偏差，仿佛下岗不是对人以往拥有的各种社会权力的无情剥夺，而是救赎、启蒙精神氓众的治世良方，因此不能不说作者对弱势群体精神世界的如此解读是遗憾的。     

加强情感教育提高"学困生"的数学成绩

随着素质教育思想的提出和实践，“学困生”问题已逐渐成为教育界关注的焦点，如何提高“学困生”的数学水平，已成为数学教师的一个带有挑战性的问题，数学教学中的情感教育是促进“学困生”转化的一项重要策略。     

基于物理元胞自动机的岩石破坏模拟

为了分析岩石材料的非均质性对其破坏演化的影响,根据元胞自动机理论,从能量的角度建立了一种能够从细观层次上对岩石破坏演化进行模拟的物理元胞自动机模型(Mh-PCA模型),模型引用的Weibull随机分布函数对材料的非均质性进行描述.运用该模型,对m分别为1,5,10,15四种不同均质度材料的破坏模式及其破坏过程中的声发射现象进行了模拟分析.结果表明:材料的非均质性对其破坏有重要的影响,均质度越高,破坏过程中的分支裂纹越少,声发射也越集中.物理元胞自动机理论为岩石的破坏研究提供了一种新的研究思路.     

关于应用残数定理证明代数恒等式问题的探讨

函数在孤立奇点的残数,函数在无穷远点的残数.利用残数及残数定理可以证明高等代数中的一些恒等式,同时导出拉格朗日插值公式.     

Secondary immunization inhibits drug induced apoptosis<Emphasis Type="Italic">in vivo</Emphasis>

Immunization with a proper dose of an antigenic stimulus leads to cell proliferation and antibody response of circulating lymphocytes. We have previously observed that Secondary immunized spleenocytes resist ceramide-mediated apoptosisin vitro. Our present study is aimed at investigating thein vivo effect of immunization on apoptosis. Mice were subjected to either Primary or Secondary dose with Tetanus Toxoid. Unimmunized spleenocytes served as controls. Unimmunized, Primary and Secondary immunized mice were later exposed to chemotherapeutic drugs such as Etoposide/Methotrexate/Vincristine to induce apoptosis. Apoptosis was studied by using the Feulgen reaction on 5μ thin parafin sections of spleen. It was observed that Secondary immunized mice showed a lower percentage of apoptosis as compared to Primary or Unimmunized mice that was subjected to either of the chemotherapeutic drugs. It was thus concluded that Secondary immunization inhibits the process of chemotherapeutic drug induced apoptosis in vivo.     

Explanations of attitudes to change: Colombian mathematics teachers’ conceptions of the crucial determinants of their teaching practices of beginning algebra

This article arises from a study whose overall purpose was to investigate the relationship between Colombian mathematics teachers’ conceptions of beginning algebra and their conceptions of their own teaching practices. The teachers’ understandings of their teaching practices were explored with a view to unravelling their conceptions of change in their teaching. Focusing on the perspectives of teachers afforded opportunities that exposed the powerful role that the teachers’ conceptions of social/institutional factors of teaching played in their conceptions of their practices. The degree to which the teachers attributed these (external) factors as crucial reasons for what they do in their teaching was the basis of a categorisation of their conceptions of the crucial determinants of their teaching practices into three types. The findings are particularly relevant to our understanding of the stability of mathematics teaching approaches in the Colombian context but have likely implications for a range of international education contexts. Specific implications for the development of the research into teachers’ conceptions of mathematics and its teaching, and for teacher education programmes are presented.

高校毕业生弱势群体就业策略探析

分析了毕业生弱势群体的主要构成,并从"以人为本"理念出发,提出了高校毕业生弱势群体的就业干预机制的若干对策,认为应完善就业改革,优化就业环境;弱势群体,强势关注;深化教学改革,培养社会需求的人才;引导弱势群体自立自强,提高自身素质,成为就业单位青睐的人才。     

广义线性模型极大似然估计弱相合性的数值模拟

广义线性模型是经典线性模型的自然推广,它是一类应用广泛的统计模型.选择Probit模型,利用matlab编程,通过数值模拟的方法验证了广义线性模型的极大似然估计的弱相合性.     

强酸-弱酸混合体系中准确滴定强酸的研究

为准确滴定出强酸-弱酸混合体系中所含强酸的量,需考虑在不同的准确度要求条件下,混合酸体系中弱酸的浓度范围要求。基于混合酸滴定过程终点误差的2个来源分析,提出了混合酸体系中终点误差(TE)计算的新方法。在指定的终点误差要求和强酸的浓度范围条件下,计算了HCl-HAc、HCl-六次甲基四胺盐两种混合酸体系中HAc、六次甲基四胺盐浓度范围要求,随着各酸碱指示剂变色点pH值的增大,两弱酸浓度的上限要求逐渐减小。在|TE|=1%条件下,当HAc、六次甲基四胺盐浓度分别低于1.18和0.135 mmol/dm3时,可采用任意酸性指示剂准确滴定0.1 mol/dm3浓度范围的HCl含量;而当两弱酸浓度分别低于10.6和10.5 mmol/dm3时,准确滴定出混合酸体系中1.0 mol/dm3的HCl含量亦可采用任意酸性指示剂。