如何在活动中提高学生英语应用能力

英语教学中的活动可增进学生之间的交流,增加英语应用机会,是常见的教学手段和策略。从教学活动的目的、内容、类型等方面加以阐述,并列举实例加以说明,指出合理组织活动是增强学生主动意识、提高学生运用英语能力的有效途径。     

情感教育视域下特殊教育师生关系的偏倚及回归

师生关系具有丰富的情感价值,其状况直接影响特殊学生在校的学习生活与特殊教育质量.基于情感教育理论视域,实践中,特殊教育师生关系囿于传统观念、教师情感素质、学生生理或心理功能缺失的影响,日益显现出重知识轻情感、单一线性及生活与人身的过度依赖等偏倚现象.特殊教育中师生关系情感偏倚的原因在于,部分特殊教育教师情感素质与教育敏...     

Transgenic barley with overexpressed PTrx increases aluminum resistance in roots during germination

A transgenic barley line (LSY-11-1-1) with overexpressed Phalaris coerulescens thioredoxin gene (PTrx) was employed to measure the growth, protein oxidation, cell viability, and antioxidase activity in barley roots during germination on the presence of 2 mmol/L AlCl₃ on filter paper. The results show that (1) compared with the non-transgenic barley, LSY-11-1-1 had enhanced root growth, although both were seriously inhibited after AlCl₃ treatment; (2) the degree of protein oxidation and loss of cell viability in roots of LSY-11-1-1 were much less than those in roots of non-transgenic barley, as reflected by lower contents of protein carbonyl and Evans blue uptakes in LSY-11-1-1; (3) activities of catalase (CAT), glutathione peroxidase (GPX), ascorbate peroxidase (APX), and glutathione reductase (GR) in LSY-11-1-1 root tips were generally higher than those in non-transgenic barley root tips, although these antioxidase activities gave a rise to different degrees in both LSY-11-1-1 and non-transgenic barley under aluminum stress. These results indicate that overexpressing PTrx could efficiently protect barley roots from oxidative injury by increasing antioxidase activity, thereby quenching ROS caused by AlCl₃ during germination. These properties raise the possibility that transgenic barley with overexpressed PTrx may be used to reduce the aluminum toxicity in acid soils.     

“分子生物学实验”课程教学改革的实践与探索

针对目前社会对于生物应用型高级人才的需求,本文从优化教学内容、改革课堂教学方法、更新教学手段、改革考核方法等方面,对高职高专分子生物学实验教学改革进行了探索.通过教学实践,在提高同学们的获取知识能力和动手操作能力以及培养同学们的团队意识方面取得了很好的效果.     

学分制教学改革后高校体育选项课的教学管理平台的构建

通过文献、问卷调查、专家访谈、数理统计等方法对安徽省实行学分制的高校开展体育选项课的情况进行调查分析,指出高校应建立健全网上选课系统软件的开发和研究,合理调配教师队伍的业务结构,建立健全高质量的符合学分制教学管理要求的师资队伍群,在教学考核中统一教学考核方法和标准,做到教考分离是完善学生选课的关键。     

Laboratory investigation of the strength development of alkali-activated slag-stabilized chloride saline soil

Saline soil stabilization is being increasingly applied in foundation treatment engineering. Chloride saline soil obtained from sites and laboratory-made chloride soil (ZS) with various NaCl concentrations prepared artificially were stabilized using alkali-activated slag (AS). A series of unconfined compressive strength (UCS) tests, X-ray diffraction (XRD), energy-dispersive X-ray analysis (EDXA), thermal gravity-differential thermal gravity (TG-DTG), and ion concentration tests were conducted to investigate the strength variation and mechanism of the AS-stabilized chloride saline soils. The results showed that NaCl has a significant influence on the strength of AS-stabilized chloride saline soil and the strength of AS-stabilized ZS (GZS) increases with increase of chloride content in soil samples. Friedel’s salt (Fs) and NaOH are generated by the reaction of NaCl and CaO·Al2O3 (CA) in the slag in the GZS. Fs can fill the pores in stabilized soil, and NaOH can promote calcium silicate hydrate (CSH) generation. These two effects combine to enhance the strength of GZS. The relationship between the rate of increase of 28-d UCS of AS-stabilized chloride saline soil and the chloride content in soil was obtained through regression analysis of the increase of UCS of GZS.     

交变电流有效值与平均值的区别

物理是一门理论与实验相结合的学科，物理知识通过概念和规律建立了严密的逻辑体系。在中学生中有一些学生学习态度、兴趣和习惯都比较好，可学习成绩不尽如人意，通过对这些学生观察发现，这些学生在学习物理时，存在一些思维障碍，表现在以下几个方面。     

教育装备项目采购管理研究——以宁波市镇海区教育装备项目为例

重点阐述教育装备的基本概念,探讨进一步优化教育装备项目采购的工作流程。在供应商选择中,重点描述战略合作供应商的评价指标体系,明确供应商的选择程序。阐述合同档案管理、查询应用管理情况。其研究成果可为项目采购管理在教育装备管理领域的研究应用提供经验参考。     

孤独症儿童中央统合功能特点研究述评

Frith1989年提出孤独症是一种以信息加工缺陷为特征的认知障碍后,孤独症儿童非社会性损伤已成为孤独症研究的一个热点。相关研究结果提示,孤独症儿童刻板的重复行为与狭隘的兴趣、特殊的知觉和注意以及超常技能等,可能与孤独症儿童中央统合功能不足有关。本文主要对孤独症儿童中央统合功能的非言语测验研究、言语测验研究进行梳理,并对孤独症儿童中央统合功能研究在完善研究方法、扩展研究范围、扩大研究对象等方面作出了展望。     

基于iBATIS持久层扩展缓存的分析及实现

iBATIS是非常优秀的对象关系映射工具,使用它能提高系统的开发速度。通常使用缓存不必每次去调用资源层,这能提高系统的性能。在分析iBATIS缓存的基础上,引入基于时钟页面调度算法扩展了另外一种实现,性能接近于LRU。