Zinc hydroxystannate and zinc stannate as flame‐retardant agents for flexible poly(vinyl chloride)

The flame‐retardant and smoke‐suppressant properties of inorganic tin compounds such as zinc hydroxystannate (ZHS) and zinc stannate (ZS) were investigated in a comparison with alumina trihydrate, magnesium hydroxide, and Sb₂O₃ through the limiting oxygen index test and smoke density test. The flame‐retardant mechanisms were studied through the char yield test, SEM, quantitative analysis, thermogravimetry and differential thermal analysis. The thermal degradation in air of flexible PVC treated with the above compounds was studied by thermal analysis from ambient temperature to 800°C. The results showed that tin compounds such as ZHS and ZS could be used as a highly effective flame retardant for flexible PVC, and it appears that the tin compound may exert its action in both the condensed and vapor phases, but mainly in condensed phases as a Lewis acid. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 1469–1475, 2005     

低碳经济时代企业的社会责任

阐述了低碳经济与企业社会责任的含义,分析了企业社会责任与企业竞争力的关系,提出了在发展低碳经济过程中企业应当承担的社会责任。     

AADL 测试模型的构造研究

目前,结构分析和设计语言AADL在任务关键嵌入式系统领域有着良好的应用.为了保障任务关键软件的质量,文章提出基于AADL测试模型对AADL设计模型进行测试,以发现设计模型中存在的错误.研究给出了体现系统拓扑结构的AADL测试模型的形式定义及由AADL构造该测试模型的算法,基于该测试模型可以对AADL设计模型中构件交互的输入、输出端口序列和连接的正确性进行测试,并以飞行控制系统的AADL设计模型为例,阐释了研究成果.     

SiO_2/Al_2O_3 RATIO OF HYDRATED SODIUM ALUMINOSILICATE IN ALUMINA PRODUCTION

ＳｉＯ２／Ａｌ２Ｏ３ＲＡＴＩＯＯＦＨＹＤＲＡＴＥＤＳＯＤＩＵＭＡＬＵＭＩＮＯＳＩＬＩＣＡＴＥＩＮＡＬＵＭＩＮＡＰＲＯＤＵＣＴＩＯＮ①ＤｅｎｇＨｏｎｇｍｅｉ，ＺｅｎｇＷｅｎｍｉｎｇ，ＣｈｅｎＮｉａｎｙｉＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＭｅｔａｌｕ...     

圆锯片的有限元模态分析

针对金属冷热锯机锯片在锯切轧件过程中出现的振动问题 ,利用 MSC/ NASTRAN有限元软件 ,计算分析了各种参数对锯片模态的影响。从而为锯片的设计及其制造工艺的确定提供了可靠的参考依据 ,为最终解决生产中的实际问题发挥了重要作用     

Sr对高铁Al-Si合金组织和性能的影响

研究了Sr元素（加入量分别为0．03％、0．06％、0．09％、0．12％和0．18％）对含Fe量为1．2％的ZL102合金的组织和性能的影响。研究发现，随着Sr元素的加入，合金中粗大的针状Fe相开始出现断裂分叉现象，同时针状Fe相的长度也随Sr元素加入量的增加而减小，但Sr对Fe相的针状形貌没有明显改变。随着Sr元素加入量逐渐增加，合金的抗拉强度和伸长率均呈现出先增后减的变化趋势。当Sr元素加入量达到0．12％时，合金材料的综合力学性能最佳。     

热处理对Ag—15Al固溶体短程有序度的影响

研究了热处理对Ag-15Al(at％)固溶体合金电阻率和有序参数的影响,由X射线衍射分析表明,合金的短程序转变不是Ag_3Al化合物型的δ第二相的形成,而是α-Ag-Al固溶体原子的有序排列。     

家庭理财系统的开发及实现

划分了家庭理财软件的功能模块,完成了数据库设计,并实现了家庭理财系统的建立.     

Optimizing Financial Engineering Time Indicator Using Bionics Computation Algorithm and Neural Network Deep Learning

Computational Economics - The present work aims to optimize the time index of financial engineering to improve the efficiency of financial decision-making. A Back Propagation Neural Network (BPNN)...