Design and Realization on Remote Condition Monitoring System for Feeding Oil Pump

In view of the actuality of the feeding oil pum monitoring,the network technology,the database technology and the Dot Net remote technology are integrated nimbly to construct the remote condition monitoring system for feeding oil pump,which has many functions such as the real-time data monitoring and alarm,real-time monitor data storage remote monitoring,network data sharing,fault analysis,and so on.The whole construction design of the system and the realization of its sub function are given.The worker's intensity of labor,the maintenance cost and the accident occurrence rate of the feeding oil pum were dramatically reduced when the system was applied to the oil storeroom successfully.     

芥菜型油菜(Brassica Juncea)杂种优势利用的研究

1973年,本院发现芥菜型油菜雄性不育株后,经连续几年研究,1975年育成了欧新 A 不育系,欧新 B 保持系和74243—6恢复系,实现了芥菜型“三系”配套。多年来连续测定表明,育成的芥菜型“三系”表现育性稳定,欧新 A 不育系的不育株率达100%,单株自交结实指数平均在0.000—0.103之间。恢复株率为99.54～100%,F_1杂种有较强的苗期优     

AN IMPROVED MIXED FINITE ELEMENT METHOD OF ANALYZING THREE-DIMENSIONAL ELASTIC CONTACT PROBLEMS

This paper presents an improved mixed finite element method of analyzing elastic contact problems, in which a new numerical algorithm is developed to calculate the flexibility matrix of the contact region. With this method the contact problem of two teeth-engaging is initially solved as a three-dimensional elastic finite element analgsis, In comparison with mixed fimte element method, the improved mixed finite element method is much more efficiency in solving contact problems.     

苏、菊、明、虎母种、交原种及四元杂交种对BmNPV的抗性鉴定

为了探讨四元杂交种对家蚕核型多角体病毒(Bmobyx mori nucleopolyhedrovirus,BmNPV)的抗性遗传规律,对苏、菊、明、虎母种、交原种及四元杂交种进行了抗性鉴定。结果显示:各母种对BmNPV的抗性存在差异,抗病性由大至小的顺序为虎、明、苏、菊,各交原种的抗性高于母种,四元杂交种的抗性高于交原种,表现出较明显的杂交优势。研究结果为理解四元杂交种对BmNPV的抗性遗传规律提供了有价值的参考,为提高苏·菊×明·虎的抗性奠定了基础。     

RP-HPLC法筛选千斤拔有效成分的提取工艺

研究了千斤拔有效成分提取分离的最佳工艺条件,通过RP-HPLC法进行了单因素和正交试验考察提取工艺.结果表明,千斤拔有效成分的最佳提取分离工艺为:分别用石油醚、三氯甲烷脱脂,脱脂后药渣加入料液比为1∶14的醋酸乙酯100℃回流提取3h,提取2次.     

中药方剂肠痈Ⅱ号中总黄酮的含量测定

利用分光光度法测定肠痈Ⅱ号中总黄酮的含量.以95％乙醇及各显色试剂为参比溶液,芦丁为对照品,确定最大吸收波长为508 nm,线性方程为y=0.012 4x-0.006 2(R2=0.999 7),测定肠痈Ⅱ号中总黄酮含量为0.25％.研究结果为肠痈Ⅱ号的后续研究提供基础.     

A histone acetyltransferase regulates active DNA demethylation in Arabidopsis

Active DNA demethylation is an important part of epigenetic regulation in plants and animals. How active DNA demethylation is regulated and its relationship with histone modification patterns are unclear. Here, we report the discovery of IDM1, a regulator of DNA demethylation in Arabidopsis. IDM1 is required for preventing DNA hypermethylation of highly homologous multicopy genes and other repetitive sequences that are normally targeted for active DNA demethylation by Repressor of Silencing 1 and related 5-methylcytosine DNA glycosylases. IDM1 binds methylated DNA at chromatin sites lacking histone H3K4 di- or trimethylation and acetylates H3 to create a chromatin environment permissible for 5-methylcytosine DNA glycosylases to function. Our study reveals how some genes are indicated by multiple epigenetic marks for active DNA demethylation and protection from silencing.     

基于TRIZ理论汽车供应链核心企业的供应物流优化研究

汽车供应链核心企业的供应物流是整个供应链的源头,其管理的好坏直接影响着供应链的健康发展。为了提高竞争力及市场占有率,通过采用TRIZ理论中突破思维惯性的方法—九屏幕法对汽车供应链核心企业供应物流问题进行分析,运用最终理想解及TRIZ理论的抽取原理和机械系统替代原理找到优化供应物流的对策,即建立信息互动平台和采用第四方物流供应物流模式,同时运用最终理想解方法优化供应物流流程。