废旧电路板热解过程中溴化氢的生成及脱除

利用热重-红外联用仪和石英管热解实验装置研究了废旧电路板热解回收过程中HBr的生成与脱除特性．结果表明：HBr主要在电路板快速失重阶段（300-360℃）析出，与溴化环氧树脂和环氧树脂的主链降解同时发生．添加CaCO3能有效地脱除热解过程产生的HBr，同时不影响电路板的降解行为；通过添加适当比例、粒径的CaCO3以及控制加热速率、热解温度等热解条件可以较好地消除HBr的危害。     

商业养老保险的精算模型

保险公司开办的商业养老保险,是我国养老保障制度的重要补充.收缴合理的保费是保险公司生存的关键.针对商业养老保险,建立了若干种养老保险模型,并利用精算数学的方法给出了这些模型的趸缴及年缴均衡净保费的计算公式.     

对以外文电影为媒介的视听教学活动的调查分析

多媒体辅助教学的广泛运用,已对语言教学产生了深远的影响,而外文电影为媒介的视听教学正是其中一部分,为了对其具体的效果进行全面了解,笔者对此进行了调查和座谈,并由此进行了分析,旨在探讨外文电影为媒介的视听教学的新模式。     

完善我校内部教学质量管理体系

教学质量是学校的“生命”,课堂教学是学校教学的主要环节,课堂讲授是教学的基本形式,讲授质量是决定教学质量的关键因素之一。科学、有效的教学质量评价是增强学校广大教职工的责任意识、质量意识、创新意识,不断提高教学质量和效率的重要手段。本文主要阐述我校内部教学质量管理体系。     

Research on Flax Fiber Reinforced Polylactide Environmental Friendly Composite

Biodegradable polylactide acid （PLA） resin can be combined with flax fibers to produce biodegradable composite materials. In our study, commercial PLA fibers were mixed with flax fibers by a non-woven method so as to make non- woven pre-forms, which can be generated into flax fiber reinforced PLA environmental friendly composites by heat pressing technology. The tensile, flexural and impact properties are tested in order to evaluate the basic physical properties of the composites, and the influenced factors listed as making technology of the pre-forms, weight ratio of flax fibers and heat pressing technology are discussed and optimized, which can be described as weight ratio of flax fibers and PLA fibers is 50/50, heating temperature, time and pressure are respectively 195℃, 20 rain and 12.5 Mpa. Preliminary results show that mechanical properties of the flax/PLA composites are quite promising compared with flax/PP composites in coclrnon commercial automotive use. Scanning electron microscope （SEM） is used to analyze the tensile specimen fracture surfaces, which shows voids and gaps occurring between flax fibers and PLA matrix and sign of fiber pull.out, the strength of flax/PLA interface can be further improved.     

基于项目集的关联规则数据挖掘

为了发现项目集中所有的频繁模式,根据关联规则定义及属性,利用Apriori算法实现关联规则的挖掘,挖掘出新的关联规则。可产生清晰有用的结果;通过项目集的关联规则挖掘研究结果既可以广泛应用于各个领域,也可以检验行业内长期形成的知识模式,同时能够发现隐藏的新规律,成为完成数据挖掘任务的一个重要手段。     

Multicast routing algorithm of multiple QoS based on widest-bandwidth

1 .INTRODUCTIONA mobile Ad hoc network refers to a temporal multi-hop autonomy system,whichis constituted by a groupof mobile nodes containing wireless send-receive equip-ments[1].It possesses manycharacteristics-fast-deploy-able,self-organized,acentric , movable and of multi-hop.It can be wildly applied to many fields ,such asnational defense,emergency and disaster ,scientificin-vestigation and exploration etc .,and uponthat ,it hasgreat prospects[1 ,3 6]. With the wide spread of mo-bile…     

Research on system-of-systems combat simulation model formal specification and representation

1. INTRODUCTION Weapon equipments acquisition and demonstration has become more and more prominent in the informationalized war conditions while operational effectiveness evaluation is its core part. The compl- exity and uncertainty of weapon systems operational effectiveness evaluation make traditional analysis methods or expert evaluation methods less effective to solve problems. Simulation based operational effe- ctiveness evaluation is an efficient solution. The increased complexity o…     

非线性电液伺服系统的稳定性研究

分析了典型的采用线性状态反馈的电液伺服控制系统的稳定性;理论研究和仿真结果表明稳定的系统由于一些系统状态变量的影响,系统的稳定性存在渐近稳定性的可能.     

200 MN油压机液压系统的减振与降噪

通过测试200MN油压机液压系统表明动力流体和管路的耦合振动是液压系统主要的振动源.分析给出了液压泵和管路系统的模型,建立了液压管路及相关部件的传递函数矩阵,给出了解决特性阻抗的途径,为设计高压大流量油压机系统提供了参考.