Role of Mg on Structure and Mechanical Properties in Alloy 718

The role of Mg in alloy/718 has been systematically investigated. Mg raises not only high temperature tensile and stress-rupture ductilities but also increases considerably smooth and notch stress-rupture life. Mg containing alloy 718M is free of stress-rupture notch sensitivity. Mg improves creep and fatigue interaction properties (LCF or cyclic stress rupture) at any grain size. The basic role of Mg is equilibrium segregation at grain boundaries which helps to change continuous grain beundary (5-Ni3Nb morphology to discrete globular form which has a retardation effect on intergranular fracture. Mg promotes the change from intergranular to transgranular fracture mode.     

波形轮齿形加工装置的研究

利用活齿齿形加工原理，对〈苏〉５３２型滚齿机进行了技术改造设计，实现了准确、经济、高效地加工外波式活齿减速器波形轮齿形的目的，为活齿减速器的推广应用创造了良好条件。     

Characterization and adsorption behavior of a novel triolein-embedded activated carbon composite adsorbent

A novel triolein-embedded activated carbon composite adsorbent was developed. Experiments were carried out in areas such as the preparation method, the characterization of physicochemicai properties, and the adsorption behavior of the composite adsorbent in removing dieldrin from aqueous solution. Results suggested that the novel composite adsorbent was composed of the supporting activated carbon and the surrounding triolein-embedded cellulose acetate membrane. The adsorbent was stable in water, for no triolein leakage was detected after soaking the adsorbent for five weeks. The adsorbent had good adsorption capability to dieldrin, which was indicated by a residual dieldrin concentration of 0.204μg·L^-1. The removal efficiency of the composite adsorbent was higher than the traditional activated carbon adsorbent.     

8031扩展一片8255来管理点阵式液晶显示模块

介绍了一种在８０３１为核心的单片机系统中扩展一片８２５５来管理ＵＣ－１６２－０９（０３）（１６×２）点阵式液晶显示模块的实用电路及软件配置。ＵＣ－１６２－０９（０３）模块可以显示１６×２个字符（显示位），每个显示位５×７点阵结构。     

赤星菌毒素对烟草幼苗致病特性的研究

文章首先测验了3种培养液对烟苗生长的影响和赤星病菌在培养液中产生毒素的能力,据此选出查彼培养液用于产生毒素的培养。病菌在查彼培养液中生长28天后,表现出最高的毒素活性,毒素活性临界值(TWE50)为32。然后用毒素粗提液处理幼苗,以幼苗悬滴接种法为对比。烟苗在12小时内可见对毒素发生明显反应,表现为根部变褐和须根脱落,对悬滴接种的反应要到72小时后才可鉴别。毒素处理后36小时内烟苗进而萎蔫,21个品种的萎蔫程度与12小时内的根部反应趋势一致,根部反应和萎蔫的程度又同时与品种对悬滴接种的反应趋势相一致,3种反应间的吻合度平均近80％。     

大型储油罐电位的模拟测量和计算

本文通过解析法、数值解法和实际的模拟测量,研究了设定的油面电位分布时油罐中静电场分布及轴线上场强变化的情况。为监测油面电位大小提供了一个可行的实测方法。     

有限群的正规π补

文章给出了有限群G具有正规π补的充要条件     

河南西峡恐龙18srDNA片段质疑

按照ｒＤＮＡ的结构特点，将ＤＡ１８Ｓ１，７与其他８种生物的ｒＤＮＡ序列进行排列比较，结果表明这２个序列不是恐龙ｒＤＮＡ片段，ＤＡ１８Ｓ７看来更接近一种植物ｒＤＮＡ片段（与金虎尾的同源性达９４％以上），而ＤＡ１８Ｓ１与２种参与比较的真菌ｒＤＮＡ序列有很高的同源性（８８．３％和８９％），它们与脊椎动物ｒＤＮＡ的同源性分别只在６７．８％～７４．１％之间。     

我国股权设置对证券市场的影响

对我国目前股权设置存在的问题进行了剖析，提出了现有上市公司中的国家股、法人股上市流通；Ａ，Ｂ股逐步并轨以及新上市同一公司同次发行的股票应采用单一的形式等具体政策建议．     

甘油硝化过程中原料甘油所含杂质对安定性影响的统计分析

本文用统计方法分析甘油硝化过程中，原料甘油中杂质对硝化甘油安定性的影响，并在统计学意义下，给出了原料甘油中杂质对安定性影响程度的初步排序．统计分析的结果与化工原理及生产实践相吻合．