Abstract:A new developed optimal design model for city wastewater treatment plant is introduced in this paper.The uncertainty of design parameters and variation of quality and quantity of influent water on city wastewater treatment plant design is considered in th

Abstract:The concept of strong open covering is used to introduce the m-compact-ness in fuzzy topological space. The relations between the m-compaeeness and the m-convergence of fuzzy net are studied and it is proved the m-eompacmess satisfies the Tychonoff produc

Abstract:We investigate the existence of positive solutions for odd order neutral differential equations and obtain some sufficient conditions of existence of a positive solution when the neutral term is allowed to oscillate about 1. The results obtained partly an

Abstract:We prove the weighted boundedness for some vector valued commutators of a kind of generalized singular integral operators,which includes many important operators.

Abstract:To counter representative defects in a pressure-containing member,a simplified defect mechanical model is established and the relationships of the size and depth of two extreme defects, properties of material and internal pressure are calculated and discu

Abstract:A new fire refardant melamine salt of 2, 2-bis (hydroxymethyl)-1, 3 propanediyl bis(dihydrogen phosphate) is prepared from phosphous oxychloride,pentaerythritol and melamine. Its structure is characterized by melting point and IR. The fireproofing behavio

Abstract:通过将其他元素或原子基团掺入氢化非晶碳膜网结构中的方法，可以实现对α－Ｃ：Ｈ薄膜的改性，赋予α－Ｃ：Ｈ膜新的特性，从而满足某些特殊应用的需要，用含胺基的碳氢化合物正丁胺作为碳源，用等离子体增强化学气相沉积方法制备α－Ｃ：Ｈ膜．薄膜的红外光分析表明胺基团已掺入薄膜的网络结构中，喇曼光谱分析表明薄膜具有无序态碳、三配位碳和四配位碳原子的混合结构，但主要成份为无序态碳，将掺胺的α－Ｃ：Ｈ薄膜作为质量传

Abstract:A new technology of CKS for forming conversion film on aluminum alloy was developed. The process of conversion coating formed by CKS was discussed by using electrochemical testing technology,and the distrituting laws of compostion and valency of cerium in

Abstract:运用Ｃ６０分子的Ｉｎ对称性及矢量运算方法，引入调节参数λ计算了正二十面体被截取顶角后的具有Ｃ６０分子结构的原子坐标，当输入的调节参数λ＝０．３３７，Ｃ６０分子的半径Ｒｃ＝３．５５Ａ时，计算得到的长短键分别为１．４４９６Ａ和１．４０Ａ，与测量值相符，并计算了在Ｃ６０面心立方晶体为１．４４９６Ａ和１．４０Ａ，与实验测量值相符，并计算了在Ｃ６０面心立方晶体中，Ｃ６０的二次轴与晶轴取向一致时的各碳原子坐标

Abstract:The oxidation weight loss rate of binderless C/C composite prepared by in-situ carbonization of pre-oxidized fibres(PAN) was tested in the air,at 0.1 Mpa,from 673 K to 973 K using thermo-weight analysis method. The textures of this material before and aft

Abstract:TiC/ZA43 composites were prepared by means of direct contract reaction method,and their friction wear properties were investigated under the condition of dry fricition,predrop-oil lubrication. At the same time,the morphologies of wear surfaces were observ

Abstract:The paper presents the test research of a large hybrid bearing with special construction in a heavy spindle head. A test rig of large and high speed hybrid bearing is built up. The measure methods of dynamic performances of hybrid bearing based on frequen

Abstract:A performance testing system for pneumatic rock drill based on PC is studied and developed in order to meet the demands for testing mining machinery. By testing vibration frequency, moving speed of drill rod, atmospheric temperature, pressure and consumpt

Abstract:New neural network architectures for fault diagnosis of linear analog circuits are proposed,with excitations applied to the circuits. The implementations of the proposed architectures by using switched current techniques are discussed,and simulative resul

Abstract:This paper chiefly introduces a kind of new method about increasing speed and precision of algorithm for the basic waveforms of signals estimation in distance pro tection. The method adopts one-period window recursive Fourier algorithm to quicken the spee

Abstract:Based on the theories of artificial neural network and wavelet transform,a model of wavelet network is proposed for PD fault diagnosis of electric power transformers. The choosing method for feature vector and the function of the network are introduced.

Abstract:Envelope analysis is an efficient approach to analyze the compound signal which is common in machinery fault signal. An envelope analysis approach Based on wavelet transform is proposed in this paper to overcome the limitation of current envelope analys

Abstract:The dynamic behavior of a structure is greatly influenced by its boundary conditions ,if dynamic method is applied to structural damage identification and parametcr identification. A reasonable assumption is put forward to simulate experimental con dition

Abstract:The method of double Fourier transform has been introduced for the analysis of rectangular foundation loaded with vertical steady vibrations on an elastic half space. And an integral representation for displacements and dynamic stiffness of rectangular fo

Abstract:A new developed optimal design model for city wastewater treatment plant is introduced in this paper. The uncertainty of design parameters and variation of quality and quantity of intluent water on city wastewater treatment plant design is con sidered in

Abstract:This paper takes stroke segment as pattern primitive to represent the structure information of Chinese character. On the basis,a new algorithm to recognize handwritten Chinese character is proposed. The characters with the similar structure information ca

Abstract:Based on the fact of the over-supply of commodity living houses along with the incompletion of the secondary market,this paper takes the factors as income, wealth and price into the purchase power analysis ,presenting an investment demand the- oretic mode