运动量——身体训练的基础

从身体训练原理、强度、时间和安排等方面充分阐述了运动量的规律及其控制。     

α-肉桂酰基环二硫缩烯酮与Grignard试剂的共轭加成反应

具有 3个亲电中心的α 肉桂酰基烯酮 1,3 亚丙二硫基缩酮 2～ ,缩酮基为六元环 ,与乙基、丙基、丁基、苯基及苄基卤化镁等的反应均得到 β′ 碳上的共轭加成产物 3～ .2～ 中环二硫缩酮基具有调控作用 .     

浸润与不浸润现象探析

本文从分子间相互作用的角度,重点分析引力与斥力在形成浸润与不浸润现象过程中的作用。     

Cross-cultural differences in apology

The current study examined the effects of national culture (U.S., China, and Korea) and interpersonal relationship type (a stranger and a friend) on apology. Findings revealed that participants (N = 376) from the three cultures differed in their perceptions of the offended person's emotional reaction and their propensities toward apology use (i.e., desire, obligation, and intention to apologize, as well as their perception of normative apology use). Regardless of their cultures, participants showed stronger obligation and intention to apologize to a stranger than to a friend. With regard to the intention to apologize, both American and Korean participants showed a greater discrepancy between themselves and their estimate of most people in their own culture than did Chinese participants. Although participants from the three cultures did not differ in their propensities toward apology use for a friend, both American and Chinese participants showed greater discrepancy than did Korean participants for feeling obliged to apologize to a stranger. For intention to apologize to a stranger, both American and Korean participants, compared to Chinese, showed greater discrepancy between themselves and their estimate of most people in their own culture. Other findings and implications thereof are discussed in more detail in the paper.     

风险补偿机制:风险分担与责任对等

探讨国家助学贷款风险补偿机制。对高校而言,由其承担部分风险补偿金是风险补偿机制对违约责任承担方界定的角色错位。由高校承担风险补偿金是让高校过多地承担了超过其义务的责任。从各国对拖欠贷款进行的风险规避与利益保障所采取的措施来看,由高校来承担一部分风险,规定其支付一定的费用也是鲜有的。在该机制中,对高校而言,其分担的风险与其应负责任并不对等。     

构建基于网络环境下教师互助学习共同体促进教师教育技术应用能力提高的应用研究

本文以广州市教师多媒体创作和信息技术应用大赛搭建的参赛管理学习平台,提出构建教师互助学习共同体,促进教师教育技术应用能力提高;同时逐步构建本地优质资源和提高资源的有效应用.     

虚拟参考咨询系统问题分析--以北京师范大学虚拟参考咨询系统为例

简要介绍了北京师范大学图书馆的虚拟参考咨询系统,并就其两年来的运行情况进行了分析,对3个影响虚拟参考咨询系统服务的问题进行了分析并提出了相应的解决方案。     

Peptidoglycan-inspired autonomous ultrafast self-healing bio-friendly elastomers for bio-integrated electronics

Elastomers are essential for stretchable electronics, which have become more and more important in bio-integrated devices. To ensure high compliance with the application environment, elastomers are expected to resist, and even self-repair, mechanical damage, while being friendly to the human body. Herein, inspired by peptidoglycan, we designed the first room-temperature autonomous self-healing biodegradable and biocompatible elastomers, poly(sebacoyl 1,6-hexamethylenedicarbamate diglyceride) (PSeHCD) elastomers. The unique structure including alternating ester-urethane moieties and bionic hybrid crosslinking endowed PSeHCD elastomers superior properties including ultrafast self-healing, tunable biomimetic mechanical properties, facile reprocessability, as well as good biocompatibility and biodegradability. The potential of the PSeHCD elastomers was demonstrated as a super-fast self-healing stretchable conductor (21 s) and motion sensor (2 min). This work provides a new design and synthetic principle of elastomers for applications in bio-integrated electronics.     

略论传统板书与现代板书的结合使用

对于课堂教学而言,传统板书与现代板书都是必需的,都是教学活动的有机组成部分。教师要正确认识两者的优缺点,并将其结合使用,从而不断优化、提升板书的质量,增强教学活动的效果。