按比例分红策略下具有常利率的泊松风险模型——Gerber-Shiu折现罚金函数

根据按比例分红策略下具有常利率的古典风险过程,得到了关于Gerber-Shiu折现罚金函数的积分方程并给出了确切的解.     

干扰条件下复合Poisson-Geometric过程的多险种风险模型下的破产概率

对索赔到达为复合Poisson-Geometric过程的风险模型进行了推广, 研究了带有干扰条件下保单到达为参数α的Poisson过程,运用鞅论的方法得出了多险种风险模型下破产概率满足的Lundberg不等式和一般公式。     

Built-up Effect of Core Material for Microencapsulated Flame Retardant Containing Dimethyl Methyl Phosphate

The flame retardants containing organophosphorus compounds have extensively been used inthe flame retarding of polymer materials.Among others,dimethyl methyl phosphate (DMMP) was applied in flame retarding of polyurethane owmg to its so much merit.However,the water-soluble property of DMMP restricted its application in textile fabric.The flame retardtag systemcontainirm DMMP will be microencapsulated to form a novel flame retardant that could be used in textiles.We have studied the builtup effect of DMMP with some inorganic compounds to improve the afterflame and afterglow suppression in the flame retarding system.The experimeatal data indicated that inorganic compounds containing various non-metal elements P,N,B and metal ions Mg2 ,Al3 ,Ca2 ,Zn2 ,Cu2 ,Mn4 could be applied in flame retarding systems as additives to effectively suppress afterflame or afterglow.     

Synthesis and Characterization of Naphthalenesulfonic Formaldehyde Condensates for Improving the Solubility of C.I.Reactive Blue 19 in Alkali Liquor

The solubility of C.I. reactive blue 19 in aqueous alkali is poor, so it isn＇t used to dye cellulosic fiber in cold pad-batch dyeing. In order to improve the solubility of this dyestuff in alkali liquor, the right dispersants will be needed. A series of condensates are synthesized by changing the synthesis conditions such as the ratio of naphthalenesulfonic （N） to formaldehyde （F）, acidity, and their compositions are confirmed by MS spectrum. It is found that in acidity scope of 20%-24% and the ratio of N to F 1∶0.33, the synthesized condensates can efficiently improve the solubility of C.I. reactive blue 19 in alkali liquor. In addition, the influences of the condensates on the exhaust dyeing and the cold pad-batch dyeing are tested.     

铁路站车垃圾衍生燃料制备工艺的正交试验研究

利用北京门头沟煤和铁路站车垃圾,在室温下采用钢模制备出了垃圾衍生燃料.选用L9(34)正交表,以落下强度和热稳定性为评价指标,考察了含水率、成型压力、煤配比和垃圾破碎粒度4个主要因素和3个水平条件对铁路垃圾衍生燃料制备工艺的影响.研究表明:各因素对垃圾衍生燃料(RDF)的热稳定性均无显著影响.试验得到的最优生产工艺参数为:成型压力50 MPa,含水率20%,粒径大小<13 mm,煤配比90%.     

随机利率下索赔次数服从复合Poisson-Geometric过程的风险模型

考虑随机利率下索赔次数服从一类双参数Poisson分布时的风险模型.当随机利率为一般的独立增量过程时,得到了总索赔额折现值的各阶矩.特别地,当独立增量过程为标准Weiner过程,损失分布为Pareto分布的情形下,计算了总索赔额折现值各阶矩的表达式,并利用一阶矩给出了有利率因素时的一类NCD保费策略.在实例分析部分,分析了模型的合理性,给出了NCD策略的数值计算结果.     

高位复合顶板综采面矿压规律研究

针对高位复合泥岩顶板煤层回采期间顶板来压变化复杂等问题,结合离石煤矿4号煤顶板特厚复合特性,对其综采工作面实施矿压观测。研究表明:该类顶板周期来压步距差异大,来压步12.6 m,动压系数为1.33,来压强度沿工作面呈近似抛物线形分布,综采支架载荷强度频率符合正态分布特征。     

氧含量对La_(0.67)Sr_(0.33)Mn_(0.9)Fe_(0.1)O_3体系性质的影响

采用标准的固相反应方法制备了La0.67Sr0.33Mn0.9Fe0.1O3氧化物系列样品,为了研究样品氧含量对样品性质的影响,分别在空气中、流动氧气中和真空中烧结了系列样品。研究发现,氧含量的不同可以在很大程度上改变物质的内部结构及其组成,可以看出在氧气氛围和真空中烧结样品的输运性质明显有别于空气中烧结的样品,这是由于氧含量的不同,改变了样品中载流子的浓度以及Mn离子的局域环境,样品中的铁磁与反铁磁作用的相互竞争和样品内部电子的局域化等因素的存在,影响材料的磁电性能。     

论二元复合地基在湿陷性黄土地基处理中的应用

结合某小区1～4号楼工程实例,对其工程地质条件进行了分析,介绍了灰土挤密桩与CFG桩二元复合地基的设计方法、施工、检测及地基处理效果。     

柚皮黄酮类化合物的微波辅助萃取工艺研究

采用微波辅助萃取法,通过单因素实验和正交试验对柚皮中黄酮类化合物提取工艺进行研究.研究结果表明,在中火温度、乙醇浓度60%、提取时间50 min、料液比1∶25的最佳条件下,黄酮得率达到2.308 mg.g-1.微波辅助萃取法提取柚皮黄酮类化合物不仅操作简单,而且是一种快速、高效、节能且实用的新型工艺.