The General Machining Process Simulator GMPS

Ｔｈｅ　Ｇｅｎｅｒａｌ　Ｍａｃｈｉｎｉｎｇ　Ｐｒｏｃｅｓｓ　Ｓｉｍｕｌａｔｏｒ　ＧＭＰＳＸｉａｏＴｉａｎｙｕａｎ，ＹａｎｇＧａｎｇ＆ＬｉＸｉｎ（ＤｅｐａｒｔｍｅｎｔｏｆＡｕｔｏｍａｔｉｏｎ，ＴｓｉｎｇｈｕａＵｎｉｖｅｒｓｉｔｙ，Ｂｅｉｊｉｎｇ，Ｃｈｉ...     

超声波复合振动加工机理及应用的研究

在超声波复合振动的基础上，分别对纵向振动和两种横向振动组成的Ⅰ型，Ⅱ型超声波复合振动的加工特性进行了较系统的试验研究，研究结果表明：Ⅰ型超声波复合振动可以对未烧结陶瓷等非导电脆性材料的异型孔穴，窄槽进行高效加工，而Ⅱ型超声波复合振动适用于对上述材料进行精细加工。     

非线性退缩抛物型方程组初边值问题的可解性

应用上、下解方法证明非线性退缩抛物组初边值问题当1相似文献   

Inhibitory effect of the adenovirus type 5 E1A protein expressed in the yeast system

The human adenovirus type 5 E1A, a tumor- suppressor gene[1], codes for two major related proteins of 243 amino acids (12S) and 289 amino acids (13S) by al-ternative splicing in two exons[2]. Studies have been shown that E1A can regulate expression of many genes and cell cycle[3]. Both in vitro and in vivo experiments indicated that E1A could induce tumor cells differentia-tion, convert tumor cells into an epithelial phenotype, in-hibit tumor cell growth and metastasis and strongly en-ha…     

固相萃取高效液相色谱荧光法测定水体中超痕量苯并[a]芘

采用Supelco C18固相萃取小柱富集苯并[а]芘,应用高效液相色谱梯度洗脱法,以YWG-CH为色谱柱,乙腈为流动相,荧光法测定了水体中苯并[а]芘的含量.结果表明,苯并[а]芘在1.0×10-16~5.0×10-12g/mL的浓度范围内与色谱峰面积呈现良好的线性关系,对于浓度为3.0×10-13g/mL的苯并[а]芘6次平行测定的相对标准偏差为1.9%.利用此法测定了自来水及景观用水等水体中苯并[а]芘的含量,回收率在97%~108%之间.     

Growth ages of ferromanganese crusts from the western and central Pacific： Comparison between nannofossil analysis and ^10Be dating

Based on results of nannofossil analysis and 10Be dating in ferromanganese crusts M1-1 and A1-1 (no nannofossils were found in it),from the western and central Pacific respectively,it is found that the crust growth ages from nannofossil biostrati-graphy agree well with those based on 10Be isotope analysis. Both crusts have three growth layers,and the oldest layer was deposited in Miocene at about 12.80 Ma. The maximum,minimum,and average growth rates of crust A1-1 (from the central Pacific) are 8.11,1.92 and 3.47 mm/Ma,and those of crust M1-1 (from the western Pacific) are 2.93,0.47,and 0.94 mm/Ma.     

Experimental studies on interaction of water mist with class K fires

Interaction of water mist with cooking oil fires is studied experimentally and theoretically. A LDV/APV system is used to measure the velocity and diameter of water mist at different pressures in the experiments,and the effect of water mist velocity and diameter on fire extinguishment efficiency is investi-gated. The experimental results show that water mist has excellent surface cooling effect; it can control and extinguish cooking oil fires quickly without re-ignition. The critical temperature (Tfo) is calculated by energy balance equation,and the fire plume momentum is calculated and compared with that of water mist in order to determine the critical velocity (νwy) of fire extinguishment. This paper provides references for cooking oil fires extinguishment with water mist.     

IFCEM based recognition method for target with interval-overlapped hybrid attributes

When the attributes of unknown targets are not just numerical attributes, but hybrid attributes containing linguistic attributes, the existing recognition methods are not effective. In addition, it is more difficult to identify the unknown targets densely distributed in the feature space, especially when there is interval overlap between attribute measurements of different target classes. To address these problems, a novel method based on intuitionistic fuzzy comprehensive evaluation model(IFCEM...     

An evaluation method of contribution rate based on fuzzy Bayesian networks for equipment system-of-systems architecture

The contribution rate of equipment system-of-systems architecture(ESoSA) is an important index to evaluate the equipment update, development, and architecture optimization.Since the traditional ESoSA contribution rate evaluation method does not make full use of the fuzzy information and uncertain information in the equipment system-of-systems(ESoS), and the Bayesian network is an effective tool to solve the uncertain information, a new ESoSA contribution rate evaluation method based on the fuzzy...     

Selecting suitable key supplier for core components during smart complex equipment central-private enterprises collaborative development process: from two different forms of evaluation information and matching perspective

With the development of central-private enterprises integration, selecting suitable key suppliers are able to provide core components for smart complex equipment. We consider selecting suitable key suppliers from matching perspective, for it not only satisfies natural development of smart complex equipment, it is also a good implementation of equipment project in central-private enterprises integration context. In in this paper,we carry out two parts of research, one is evaluation attributes bas...