Ultralin NAT-PT的设计和实现

从实际需求出发设计了NAT-PT,给出了整个系统的函数调用关系．实现并构建了基于嵌入式Linux系统的Ultralin NAT-PT平台,并进行了通性测试．     

3-6岁幼儿家庭户外活动现状及优化对策——以青岛市城阳区为例

幼儿天生就爱在户外玩耍,户外活动不仅能促进幼儿身体的健康发育,而且能够有效促进幼儿社会性以及智力的发展,家庭户外活动更能促进亲子间的感情.通过文献法、问卷调查法、访谈法对幼儿家庭户外活动进行六方面的调查,包括幼儿家庭户外活动的时间、场所、内容、伙伴、家长参与情况以及家长态度.研究发现,幼儿家庭户外活动存在家长对幼儿户外...     

语言测试理论与大学英语测试

依据Bachman和Palmer的语言测试原则,对浙江大学英语专业学生和非英语专业学生同时进行两份试卷测试。测试结果表明:CET和TEM无论对英语专业学生和非英语专业学生而言都具有区分度;非英语专业的学生并不绝对地比英语专业学生英语能力差。这两套试卷测试相关度很高,表明用统一的考试机制更能客观地反映各类学生的英语实际水平。     

2-（4-甲氧羰基苯基）-5-氨基-6-羟基苯并嚼唑的热分解机理及动力学

采用热重法（TG）测定了2-（4-甲氧羰基苯基）-5-氨基-6-羟基苯并嗯唑（MAB）的热分解过程,测定了MAB及其在热分解过程中不同阶段产物的红外光谱,运用量子化学GAMESS软件计算了MAB分子的键级,推断了MAB的热分解机理,结果表明MAB的热分解过程是一个五阶段过程,起始步骤是甲基酯的分解、根据不同升温速率下的热重曲线计算得到MAB第一阶段热分解反应的表观活化能Eα=157．1kJ·mol^-1和指前因子A=3．715×10^13。     

Reciprocity of inter-ethnic attitudes in a multicultural society

A national survey of multicultural and ethnic attitudes in Canada was conducted in 1974 (n = 1849). Data were analysed for the 1244 respondents whose ethnicity could be determined as Angloceltic, French, German, Italian or Ukrainian Canadian, A five group by five group intergroup attitude matrix was created, with each group acting both as attitude object and as holder of attitudes. Analysis indicated the existence of reciprocity or balance in the matrix: groups tended to reflect the attitude held toward them back onto the group holding the attitude. However this structural balance was moderated by the existence of shared attitudes about the position of a group in the national ethnic hierarchy. Further analysis indicated the existence of ethnocentrism in the matrix: attitudes toward ingroup and positive reference groups were more positive than toward out-groups. Perceived intergroup similarity and familiarity were positively correlated with each other and with intergroup acceptance. Results were discussed in relation to attitude balance theory and ethnocentrism theory, and in their implication for intergroup research in multicultural societies.     

Cognitive development and instructional theory

The foundations of the cognitive-developmental curriculum movement are briefly examined in this paper. The key features of this movement are the recommendations it makes in three areas: curriculum sequencing, curriculum content, and teaching strategies. Each of these areas is critically examined. It is concluded that the grounds for all proposals are purely theoretical. When the data are considered, they either contradict specific proposals or provide no direct evidence.     

基于反向代理的IPv4与IPv6网络资源共享

基于IPv4与IPv6将长期共存的现状,两网之间的资源共享是必然的。本文提出一种基于反向代理的方式,更方便、更有效地实现IPv4网络与IPv6网络之间的资源共享,并给出具体实现案例。     

透析大学英语四、六级机考的优点与不足

大学英语四、六级机考自2008年12月以来,已在全国1000多所高校试点,并取得了很大成功。本研究主要从机考的内容、形式、效果和考生对机考的适应性角度分析了大学英语四、六级机考的优点与不足,以期为不断丰富和完善大学英语四、六级机考奠定基础。     

运动对骨骼肌中IL-6产生的影响

运动可以引起机体免疫系统产生一系列复杂的非特异性反应,其中一个很重要的变化就是细胞因子的改变,主要涉及的细胞因子包括白细胞介素-1、白细胞介素-6和肿瘤坏死因子等．关于运动和IL-6,大部分学者是把它们作为炎症反应的指标来研究的．通过IL-6来反映运动训练对机体炎症反应的影响。本文作者采用文献综述法,对运动训练导致的在体及离体骨骼肌和骨骼肌细胞中IL-6的产生,以及其产生、机制和生理功能作了综述。     

咖啡因对6-羟基多巴胺诱导大鼠帕金森病模型作用的量效关系

目的：探讨咖啡因对大鼠6－羟基多巴胺（6-OHDA）诱导的帕金森模型作用的量效关系及其最佳用量。方法：应用6-OHDA制备成年大鼠右侧损毁的帕金森病模型,通过外周注射阿朴吗啡促使大鼠旋转次数作为对其病情进行定量检测的指标。用已知不同剂量的咖啡因每天对大鼠灌胃进行治疗,以大鼠旋转次数为主要指标,判断其对帕金森病治疗效果的变迁情况,以探讨咖啡因治疗帕金森病的最佳剂量。结果：咖啡因（30,40,50mg／kgBW）有明显治疗效果,但咖啡因40,50mg／kgBW组对大鼠有可能产生生存质量影响。结论：30mg／kgBW是咖啡因治疗6-OHDA制备帕金森大鼠模型的有效剂量,咖啡因对帕金森病的疗效随剂量增长,到一定剂量时则不再增长。