广义实正定矩阵与稳定矩阵

在［１－５］的基础上进一步讨论了广义实正定矩阵与稳定矩阵的性质与关系，较全面地解决了它们关于Ｋｒｏｎｅｃｋｅｒ乘积和Ｈａｄａｍａｒｄ乘积的正定性问题。     

均匀介质膜反射系数的理论推导

本文主要依据麦克斯韦方程推导出均匀介质膜的矩阵表示形式，利用电磁波菲涅尔反射和折射公式，推导出均匀介质膜的反射系数和折射系数，并着重推导和讨论了均匀介质膜TE波的反射率出现极值条件。     

有理不等式的一种简便解法

中学阶段所遇到的不等式都能化归为有理不等式,因而正确快捷地解有理不等式成为学生的基本能力要求;通过对“区间符号”概念的界定及原理的阐述,给出了有理不等式的简便、快捷的解法——区间符号法,对高次不等式(组)和分式不等式(组)更显其优越性,学生易学、易懂、易用,效果甚好。     

Thanks,but no-thanks for the feedback

Feedback is an emotional business in which personal disposition influences what is attended to, encoded, consolidated and eventually retrieved. Here, we examine the extent to which students’ perceptions of feedback and their personal dispositions can be used to predict whether they appreciate, engage with and act on the feedback that they receive. The study is framed in psychological theories of mindset, defensive behaviours and new psychometric measures of the psychological integration of assessment feedback. Results suggest that, in this university population, growth mindset students were in the minority. Generally, students are fostering self-defensive behaviours that fail to nurture remediation following feedback. Recommendations explore the implications for students who engage in self-deception, and the ways in which psychologists and academics may intercede to help students progress academically by increasing their self-awareness.     

形如1＋（（4n（n＋1）s^2）/（s^2-1））的平方数

设n为正整数,S为大于1的正奇数.找出了所有可使1＋（（4n（n＋1）S2）/（S2-1））为平方数的正整数n.     

浅谈老庄消极思想中的积极因素

道家思想自从杨朱立派就在世人心中奠定了消极的思想基调。作为一种哲学思想,道家思想经历了不同阶段的发展,其中最重要也是最熟知的就是老子和庄子这两个阶段。从本质上讲,老庄思想的产生背景决定了其难免带有消极的因素,应用起来也与社会现实有偏差,但这不妨碍我们正确认识和积极应用老庄思想中的积极因素。     

Relationship of Brain-Derived Neurotrophic Factor with Interleukin-23, Testosterone and Disease Severity in Schizophrenia

Hormonal imbalance, inflammation and alteration in synaptic plasticity are reported to play a crucial role in the pathogenesis of schizophrenia. The objective of the study was to assess the serum levels of brain derived neurotrophic factor (BDNF) and its association with interleukin-23 (IL-23), testosterone and disease severity in schizophrenia. 40 cases and 40 controls were included in the study. Serum levels of BDNF, IL-23 and testosterone were estimated in all the subjects. Disease severity was assessed using Positive and Negative Syndrome Scale (PANSS). The study was designed in Tertiary care hospital, South India. The results were compared between two groups using Mann–Whitney U test. Spearman Correlation analysis was used to assess the association between biochemical parameters and PANSS. Interleukin-23 and testosterone were significantly increased and BDNF was significantly reduced in schizophrenia cases when compared with controls. BDNF was negatively correlated with IL-23 (r = − 400, p = 0.011), positive symptom subscale (r = − 0.393, p = 0.012), general psychopathology score subscale (r = − 407, p = 0.009) and total symptom subscale (r = − 404, p = 0.010). There was no significant association of IL-23 and testosterone with disease severity in schizophrenia cases. BDNF was reduced in schizophrenia cases and negatively associated with interleukin-23 and disease severity scores.     

一类拟线性薛定谔方程的正解

考虑一类拟线性薛定谔方程的正解,由于该类方程所对应泛函不能定义在常用空间H1（RN）上并且嵌入是非紧的,这也导致了很难直接求解.因此利用变量变换在H1（RN）的径向空间上考虑方程的解,从而可以利用山路引理和极值原理证明所研究方程存在正解.     

从“固化”到“转型”:基于成长型思维的教师专业发展及其实现

思维方式作为支撑教师专业发展的核心,在某种程度上决定着教师专业发展的深度与高度。在场域型塑、课程固化与工作重复等因素作用下,教师专业发展很容易陷入思维固化。成长型思维的丰富内涵与独特价值,为突破教师专业发展的思维固化提供了转型基础。策略在于:教师需要检视自身的思维方式,切实意识到成长型思维对专业发展的决定作用;动态地调控思维过程,促使专业发展在成长型思维引领下积极前行;敢于直面思维局限,突破专业发展的瓶颈以达到新高度;充分发挥思维的预测功能,对专业发展的未来进行合理规划。     

母语迁移对二语习得的影响——以语音迁移为例

语言迁移是外语学习中的一种普遍现象,在二语习得理论研究中占有重要的位置,也是第二语言习得整个过程中的一个重要的因素,它分为正迁移和负迁移。正迁移能促进外语学习,而负迁移增加了外语学习的难度。分析母语迁移对外语学习具有深远的意义。