Reliability analysis of DOOF for Weibull distribution

Hierarchical Bayesian method for estimating the failure probability Pi under DOOF by taking the quasi-Beta distribution B(pi-1 , 1,1, b ) as the prior distribution is proposed in this paper. The weighted Least Squares Estimate method was used to obtain the formula for computing reliability distribution parameters and estimating the reliability characteristic values under DOOF. Taking one type of aerospace electrical connectoras an example, the correctness of the above method through statistical analysis of electrical connector acceler-ated life test data was verified.     

弹丸失效规律及有效贮存期预测研究

目的提出一种根据库存弹药性能变化的有限检测数据预测弹药产品有效贮存期的方法。方法随机抽取不同贮存年限的少量库存弹药,进行其炸药装药检测分析,获得贮存安全性和使用可靠性失效规律特征。应用灰色系统理论建立相应的功能失效模型,根据弹药产品管理规定和要求,获得其有效贮存期,结果对某弹丸有效贮存期进行预测,所得结果与试验结果一致。结论该方法可用于对现有库存弹药的有效贮存期进行预测。     

丙烯酸—丙烯酰胺反相乳液共聚合反应动力学研究

以Ｓｐａｎ８０／ｔｗｅｅｎ８０为乳化剂（ＨＬＢ＝６．４４）、Ｋ２Ｓ２Ｏ８为引发剂、甲苯为油相,研究了丙烯酸－丙烯酰胺反相乳液共聚合反应动力学。     

Flow patterns and dissipation of turbulent kinetic energy in near-wall turbulence

It is disclosed the flow patterns of turbulent flows in near wall region by means of topological analysis. It has found that there exists a close relationship between the topological characteristics and the spikes which are dominated by the strong normal velocity fluctuations near the wall. It is also shown that the dissipation of turbulent kinetic energy is closely related to the spike events.     

AMS dating on glacial tills at the source area of the Urumqi River in the Tianshan Mountains and its implications

Using accelerating mass spectrometry (AMS) dating method, a dating has been made on the primary calcium carbonate in tills and secondary calcium carbonate coating on till gravel and the roche moutonnee formed since the Last Glaciation at the source area of the Urumqi River valley in the Tianshan Mountains, northwestern China. The results reveal that the carbonate content in the tills in this noncarbonate area is high enough to date by AMS, that the carbon in the coatings on the newly exposed roche moutons and in the modern till is modern carbon and so the¹⁴C dating results in the ancient till can represent the actual ages of the till formation, and that the warm period during the Holocene began as early as 6 500 a B. P. and lasted to 1 800 a B. P.     

河南的鹅膏菌属毒菌及毒素与中毒类型

鹅膏菌属（Ａｍａｎｉｔａ）隶属于鹅膏菌科（Ａｍａｎｉｔａｃｅａｅ）,有毒菌多。本文就河南境内生长分布的鹅膏菌属毒菌种类及其毒素和中毒类型进行论述和分析,以供防治中毒与毒素的研究应用。     

慢性乙肝大学生头发微量元素含量的分析

对在校大学生1250人取静脉血检验乙肝两对半和临床确诊为慢性乙型肝炎52人;再选同等条件健康学生52人,同时测定头发中微量元素含量。结果发现,慢性乙肝学生头发中7种微量元素均低于正常学生组,其中钙、锌明显。这除与大学生处于生长旺盛期需求量多有关外,也与慢性肝炎有关,提示慢性乙肝除治疗肝病外还需补充微量元素。     

煤渣空心砖研究

文中提出了现行煤渣空心砖的不足,分析了煤渣空心砖的几何尺寸,研究了生产方法和孔洞率对煤渣空心砖强度的影响。     

Bernoulli型不等式

本文给出了几个Ｂｅｒｎｏｕｌｉ型不等式,推广或改进了Ｍｉｔｒｉｎｏｖｉｃ等人的结果。本文所用的方法具有一般性．