Cu/WC功能梯度材料在热-机械耦合作用下的有限元分析

为了体现功能梯度材料的耐高温性,本文采用顺序耦合法,通过对Cu和WC组成的双材料和功能梯度材料在热-机耦合作用下进行了ANSYS有限元模拟,结果表明,功能梯度材料较双材料具有大大缓和热应力的作用,同时也证明了Cu/WC功能梯度材料较双材料更适合用作大电流滑动触头用耐磨材料。     

国有林区低碳循环经济耦合发展测度分析

依据国有林区特征和低碳循环经济发展评价的独特性,构建了国有林区低碳循环经济耦合发展评价指标体系,并运用径向基神经网络构建了评价模型,以黑龙江省伊春国有林区展开实证研究,结果表明国有林区在很多方面已经有所改善,但在低碳循环技术、低碳排放能耗方面水平较低。总体发展呈缓慢上升中,但基本处于中等偏下水平。有必要进行针对性的调整改造,加大转型力度。     

9,10-二苯乙炔基蒽的合成及光谱性质研究

本研究以二溴蒽和苯乙酮为原料,通过Sonogashira钯催化偶联反应,四氢呋喃和二乙胺混合溶剂作为偶联反应溶剂,以较高的收率获得了标题化合物,且运用IR,UV,熔点等手段进行了结构鉴定,并通过紫外光谱和荧光光谱研究了其光谱性质。     

Schooling sexualities and gendered bodies. Experiences of LGBT students in Icelandic upper secondary schools

In this paper, we study how Lesbian, Gay, Bisexual and Transgender people (LGBT) students in Icelandic upper secondary schools interpret their experience of heteronormative environment and how they respond to it. The aim is to explore how sexualities and gendered bodies are constructed through ‘schooling’. The article draws on interview data with seven LGBT students who attended five different upper secondary schools. We also use visual data collected during fieldwork at one upper secondary school and exemplify the results with a poster and a digitalised short-film, produced by the students, to substantiate what participants told us in the interviews. All of the students experienced heteronormative discourse and lack of respect and indicated that they did not feel fully accepted in school. Upon entering the classroom, the visibility of LGBTs and discussion about different performances of gender and sexuality seem to disappear, whether in terms of textbooks, course content, teaching practices and school environment. Furthermore, LGBTs and those who do not conform to the hegemonic performances of gender are often constructed as deviations from the norm, strange, and even depicted as the abjected other. This applies in particular to the informal school, which embraces the traditions, culture and social interactions among students and teachers. This othering occurs, despite relatively positive attitudes towards LGBT people in Icelandic society in general. The results signify a gap between policy and practice as regards the positioning of LBGT students, which affects their schooling and well-being.     

项羽与“布衣王侯之局”——兼论秦汉之际的社会阶层变动

西周世卿世禄制度在春秋战国之世逐渐被诸侯国实施的功勋授爵制度所取代,"封侯"成为社会各阶层的普遍愿望。秦国商鞅变法,所颁二十等爵制中多有以功勋授爵之爵级。反秦战争爆发后,陈胜以"黔首"自立为王,激起了社会各阶层对"封王"的渴望。随后项羽分封,不论出身,只论军功,自"西楚霸王"而下所封王、侯中多有平民,此即所谓"布衣王侯之局"。刘邦在与项羽的对抗过程中,因以弱敌强之形势所迫,不得不继续分封王、侯以争揽人才,韩信、彭越等遂以布衣封王。楚汉战争结束时,刘邦一方"布衣王侯之局"已成,受封王侯者治国理政,终开赵翼所谓"汉初布衣将相之局"。     

基于应变的复合材料Non-Fickian吸湿方程

为了研究复合材料吸湿过程中的Non-Fickian行为,建立基于应变的湿扩散方程,可以更准确地描述复合材料吸湿量随时间的变化关系。基于应变的湿扩散方程中考虑湿浓度与湿热应变间的相互耦合作用,假设应变也具有"扩散"行为,引入应变扩散系数与应变耦合项,并根据经典层压板理论计算层压板吸湿过程中产生的瞬时内应力状态。分析结果表明,基于应变的湿扩散方程所得到的吸湿量随时间变化的曲线与试验结果符合较好,层压板的湿浓度与湿热应变的相互耦合作用会影响吸湿量及湿热内应力的计算,在分析中不可忽略。受热和吸湿过程中产生的瞬态应力非均匀分布于层压板内,在复合材料结构设计时必须予以考虑。     

“败绩”，非“败＋绩”——一个过度训诂的案例

持“车覆”说立阐释性新义,立“败功”义作阐释明义,都不能一统“败绩”。导致过度训诂的根因是将“败绩”的词义作“败＋绩”。“败绩”与词素“绩”,古代已有确诂,可据此立二义：大败义,翻车义;词素“绩”为事（事情）义。     

新型温度控制示教柜设计

本示教柜在设计中有三个特点:其一,PID控制与PP控制共用;其二,软件PID与硬件PWM相结合;其三,热电偶使用双重补偿.     

促进经济增长的最优科学技术耦合路径探析

为探究科学、技术对经济增长的影响效应在不同耦合路径下的差异,理论上将科学与技术耦合路径划分为六类,并在内生化科学、引入创新服务部门和人力资本开发部门基础上扩展Romer内生增长模型。通过对扩展模型进行均衡增长路径分析,得到耦合路径与经济增长间的两类关系。以我国为研究对象对这两类关系的数值模拟检验结果表明：科学强势良性路径可在短期内快速提高我国经济增长率,科技中立良性路径则更有利于我国经济长期稳定增长;科技中立路径下耦合成本率的减小有利于经济增长,但科学强势路径下耦合成本率的减小有可能抑制经济增长。由此提出科技管理体制改革中转变政府职能的政策建议。     

丹江上游非点源污染分析

简要介绍了丹江上游自然地理概况、非点源污染监测项目、方法要求及计算结果 ,重点分析了非点源污染影响因素和特性 ,提出了解决非点源污染和保护水质的有效途径。