PEDT导电聚合物气敏特性研究

采用化学聚合法制备了导电聚合物3,4-乙烯二氧噻吩膜,利用扫描电子显微镜和傅里叶变换红外光谱法对薄膜的光学成分及形貌进行了分析。采用叉指电极结构研制出了3,4-乙烯二氧噻吩薄膜气体传感器,研究了3,4-乙烯二氧噻吩薄膜气体传感器对有毒气体NO2和NH3的敏感特性以及其自身的温度特性。结果发现,3,4-乙烯二氧噻吩薄膜气体传感器对低浓度的NO2和NH3都具有很好的敏感特性。该文还对3,4-乙烯二氧噻吩薄膜对NO2和NH3两种气体的敏感机理进行了详细的讨论。     

Positive Reaction to Disclosure and Recovery from Child Sexual Abuse

ABSTRACT

Factors associated with improvement in the behavioral-emotional functioning of sexually abused children, from 6 to 18 years of age, were investigated. Children were classified by their therapist according to current level of disclosure regarding past abuse. Ratings of degree of support offered by significant people in the children's lives were also made. Findings showed children who were in an actively disclosing stage to be exhibiting significantly less externalizing behavior problems than non-disclosing children. Children who were fully disclosing without recantation showed significantly lower dissociation than did all other subjects. Children who recanted with or without re-disclosure showed significantly more post-traumatic stress symptomatology. As all the subjects were in foster care, the reactions to disclosure of foster parents proved to be most salient with respect to current functioning. Children who received full support from foster parents showed significantly lower depression scores than did children who received only partial support.

Other significant findings pertain to the effects of time since initial disclosure, age of subjects, and type of sexual abuse on behavioral-emotional functioning. Implications for developing structured training programs for foster parents and their caseworkers are discussed. Recommendations are made for future study using the present design with a non-foster care population and investigating the effect that the timing of supportive reactions to disclosure has.     

聚丙烯酰胺凝聚剂的研究

为了解决聚驱油田转后续水驱阶段地层滞留聚合物再利用的问题，运用微乳法制备聚丙烯酰胺凝聚剂的方法，研制出一种带有阳离子基团的体型聚合物凝聚剂，并对该凝聚剂的制备、性能进行了评价。结果表明：在聚丙烯酰胺凝聚剂的阳离子度为5%、两种溶液质量分数相同、体积比为1:1，剪切速率为170s^-1的条件下，可以提高黏度约10mPa·s；在80℃水浴恒温4h，黏度降低率仅为3%；在氯化钠用量达到1%时，溶液中复合体系的黏度仍为32.9mPa·s。新型凝聚剂有显著的增黏效果和深部调驱意义。     

三苯甲醇制备实验教学中的细节问题讨论

详细讨论了通过格氏反应制备三苯甲醇实验中的一些注意细节，总结了在格氏反应中出现的实验现象，并做出理论解释．     

熔渗反应法制备金刚石/SiC复合材料

为制备金刚石/SiC复合材料,采用熔渗反应法,在真空环境和烧结温度为1500 -1 600℃的条件下进行制备。 分析了复合材料的致密度、硬度和在不同温度下的干摩擦磨损性能。结果表明,熔渗反应工艺制备的复合材料致密度 高,烧结温度为l 550℃时得到的复合材料的硬度最高。反应烧结金刚石/SiC复合材料常温下的耐磨损性较好,但600 ℃下的磨损性能显著恶化     

基于ANSYS的板料成型系统模内加热模块热分析

针对目前板料热成形过程中存在的能量浪费、板料氧化严重等缺点,文章对模内加热方案进行研究探讨,使用ANSYS-Icepack对板料冲压成形的模内加热温度场进行模拟分析,并以此基础做出实物并调试对比模拟状况。结果显示：对于该模架,上下模1 000 W的热源同时加热时,加热组块最高温度可达近400℃,中间板材可加热到300 qC以上,10min之后散热和加热接近平衡。按该模型设计的实际加热系统的温度分布与模拟基本接近。该研究对模内加热模块的设计进行了模拟与初步的试验,将有助于板料热成形技术方面发展。     

学科互动:民俗学与人类学

本文从西方民俗学、人类学学术史的脉络中梳理并探讨了民俗学与人类学的学科互动过程,揭示了人类学在不同的重要理论发展阶段上对民俗学研究的理论影响,说明了民俗学与人类学相互交织的状况.民俗学是不断运动的动态发展过程,理应结合人类学理论来研究不断产生的民俗事象.     

论大股东股权质押与上市公司财务:影响机理与市场反应

股权质押融资是一种大股东常用的财务融资策略。从理论上分析,大股东股权质押融资后可能会产生控制权让位风险与杠杆化风险,这两类风险可能对上市公司造成负面的影响。因为,大股东可能"易位"而影响上市公司稳定性并造成公司价值受损,大股东过度杠杆化可能产生对上市公司中小股东的利益侵占———利益输送,透过这些机理关系,提出需借助市场反应所要检验的两个命题。     

费托合成反应机理的研究进展

本文评述了费托合成反应机理的近期研究进展，详细讨论了费托合成反应碳化物机理基础上的烯烃再吸附理论。     

汽车保险杠注射模设计与制造

将部分型芯做成活动型芯与塑件一并顶出 ,利用人工将塑件取下的办法解决一些常规模具机构不能使用的问题。在模具的加工上 ,模具的成形部件是在三维中进行的实体设计 ,实现了设计 -编程 -加工的一体化