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Cure Reaction Kinetics of Low Pressure Sheet Molding Compound System Thickened by Crystalline Polymer

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Journal of wuhan university of technology(Materials science) 2007年第2期22卷 380-384页

作者：秦岩 school of Materials science and Engineering Wuhan University of Technology

Several kinetic models for unsaturated polyester cure reaction and some existing parameter estimation techniques of these models were introduced. Correlated kinetic parameters and kinetic equations of the autocatalytic empirical kinetic model of LPSMC system were determined by using isothermal DSC to scan the system which was thickened by crystalline polymer （PEG-MAH）. Through using a serial curing degree of the system to validate the model, the experimental results were basically identical with the predictions of the autocatalytic empirical kinetic model. This model could provide a theoretical reference to the determination of molding techniques of low pressure SMC.

关键词： low pressure SMC curing kinetics model crystalline polymer

Research on the Group Decision in Manufacturing Chain

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武汉理工大学学报 2006年第S3期28卷 1102-1106页

作者： WEI Shuangying~1 LI Biqiang~2 (1.Management school,wuhan university of technology,wuhan 430070,china, 2.Management school,wuhan university of technology,wuhan 430070,china) Management school Wuhan University of TechnologyWuhan 430070China

The competition in 21st century will be the competition among different manufacturing *** chain makes decision not only the core enterprise of the manufacturing chain but also a group of *** significant decision in manufacturing chain will affect each enterprise in manufacturing chain,thus every significant decision should meet the desire and requests of each enterprise that be *** significant decision should concentrate in the opinion of each member in the rep- resentative assembly or committee and obtain the authorization of the *** vital question also should be discussed,made the decision and coordinated the moves by the representative assembly or the *** society’s development and the technical progress,the knowledge and the information content is growing suddenly,the questions needs making the decision are more and complex,the single enterprise only depended on its own resources and the strength is unable to grasp all essential information,and hard to face all *** representative assembly formed by representatives from each enterprise in manufacturing chain can gather together experts of different knowledge structure and different experience,which make up the deficiency of single enterprise in resources,strength and experience with the aid of many enterprises’resources and the *** is not just increase several brains,but to establish an information complex to ensure the scientific of decision,which formed by different knowledge structure, applies scientific theory method and means,can mutually enlighten and has abundant *** it comes down to the group *** decision questions have two types,one is the collectivity decision which pursue the holistic benefit of the group,the other is that the members in the group pursue its’own benefit and value against others,that means the game theory of interest con- flict existed among the ***,most scholars research the q

关键词： manufacturing chain group decision GDSS

Microstructure and Properties of W-15Cu Alloys Prepared by Mechanical Alloying and Spark Plasma Sintering Process

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Journal of wuhan university of technology(Materials science) 2008年第3期23卷 399-402页

作者：章桥新 school of Mechanical and Electronic Engineering Wuhan University of Technology State Key Laboratory of Advanced technology for Materials Synthesis&Processing Wuhan University of TechnologyWuhan 430070China

W-15Cu composite powders prepared by mechanical alloying （MA） of raw powders were consolidated by spark plasma sintering （SPS） process at temperature ranged 1 230-1 300 ℃ for 10 min and under a pressure of 30 MPa. By using high energy milling, particles containing very fine tungsten grains embedded in copper, called composite particles, could be produced. The W grains were homogeneously dispersed in copper phase, which was very important to obtain W-Cu alloy with high mechanical properties, fine and homogeneous microstructure. The microstructure and properties of W-15Cu alloys prepared by SPS processes at different temperature were researched. The results show that W-15Cu alloys consolidated by SPS can reach 99.6 % relative density, and transverse rupture strength （TRS） is 1 400.9 MPa, Rockwell C hardness （HRC） is 45.2, the thermal conductivity is 196 W/m-K at room temperature, the average grain size is less than 2 μm, and W-15Cu alloy with excellent properties, homogeneous and fine microstructure is obtained.

关键词： W-15Cu mechanical alloying spark plasma sintering (SPS)

Synthesis of the Novel Fluoride-containing Organic Silane

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Journal of wuhan university of technology(Materials science) 2009年第4期24卷 644-646页

作者：汪水平 school of Materials science and technology Wuhan University of Technology

A fluoride-containing organic silane was synthesized by the reaction of N-ethyl- N-hydroxy-etbyl perfluorinated octyl sulfonamide （EHPOS）, N-（β-aminoethyl）-γ-aminopropyl trimethoxy silane （ATS） and cis-butenedioic anhydride （CA）. The experimental results show that the yield of product is up to 87% when the molar ratio ofEHPOS ： CA ： ATS is 1 ： 1.05 ： 1.1. EHPOS and CA were maintained at 115 ℃ for 3 hours, then after cooling the reaction solution to 75 ℃, ATS was added and reacted for another 3.5 hours at 145 ℃. The structure of the product and thermal properties were characterized by Fourier transform infrared （FTIR） and thermogravimetric analysis （TGA）, respectively. Results show that fluoride-containing organic silane has excellent thermal stability below 185℃.

关键词： N-ethyl-N-hydroxyethyl perfluorinated octyl sulfonamide cis-butenedioic anhydride N-(β-arninoethyl)-γ-aminopropyl trimethoxy silane

TiO_2 thin film photocatalyst

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Rare Metals 2004年第4期23卷 289-295页

作者： YUJiaguo StateKeyLaboratoryofAdvancedtechnologyforMaterialsSynthesisandProcessing WuhanUniversityofTeclmologyWuhan430070China

It is well known that the photocatalytic activity of TiO_2 thin filmsstrongly depends on the preparing methods and post-treatment conditions, since they have a decisiveinfluence on the chemical and physical properties of TiO_2 thin films. Therefore, it is necessary toelucidate the influence of the preparation process and post-treatment conditions on thephoto-catalytic activity and surface microstructures of the films. This review deals with thepreparation of TiO_2 thin film photo-catalysts by wet-chemical methods (such as sol-gel,-reversemicellar and liquid phase deposition) and the comparison of various preparation methods as well astheir advantage and disadvantage. Furthermore, it is discussed that the advancement ofphotocatalytic activity, super-hydrophilicity and bactericidal activity of TiO_2 thin filmphotocatalyst in recent years.

关键词： inorganic non-metal materials TiO_2 thin films preparation sol-gel method liquid phase deposition method reverse micellar method photocatalytic activity super-hydrophilicity bactericidal activity

An Agent Interaction Based Method for Nonlinear Process Plan Scheduling

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武汉理工大学学报 2006年第S2期28卷 705-708页

作者： GAO Qinglu~1 WU Bo~2 GUO Guang~2 1.school of Management,wuhan university of technology,wuhan 430070 ,china 2.school of Mechanical Engineering,Huazhong university of science and technology,wuhan 430074,china school of Management Wuhan University of TechnologyWuhan 430070China school of Mechanical Engineering Huazhong University of Science and TechnologyWuhan 430074China

This article puts forward a scheduling method for nonlinear process plan shop *** allocation and load bal- ance are realized by bidding *** the agent interaction process,the execution of tasks is determined and the co... 详细信息

关键词： agent interaction nonlinear process plan bidding mechanism

Fabrication and Characterization of Nano Silver Powder Prepared by Spray Pyrolysis

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Journal of wuhan university of technology(Materials science) 2009年第6期24卷 871-874页

Silver powder was fabricated by spray pyrolysis, using 2%-20% AgNO3 solution, 336-500 mL/h flux of AgNO3 solution, 0.28-0.32 MPa flux of carrier gas and in the 620-820 ℃ temperature range. The effects of furnace set temperature, concentration of AgNO3 aqueous solution, flux of AgNO3 aqueous solution as well as carrier gas on the morphology and particle size distribution of silver powder, were investigated. The experimental results showed that with the high concentration of AgNO3 aqueous solution, the average grain size of silver decreased with the increasing of furnace set temperature. But the gain size distribution was not homogenous, the discontinuous grain growth occurred. With the low concentration of AgNO3 aqueous solution, the higher furnace set temperature made the nano sliver grains sintered together to grow. Nano silver powder about 100 nm was fabricated by spray pyrolysis, using 2wt% AgNO3 solutions, 336 mL/h flux of AgNO3 aqueous solution, 0.32 MPa flux of carrier gas at 720 ℃ furnace set temperature.

关键词： nano silver powder fabrication characterization spray pyrolysis

The characteristics of arc beam shaping in hybrid plasma and laser deposition manufacturing

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science china(Technological sciences) 2006年第2期49卷 238-247页

作者： ZHANG Hai’ou1, QIAN Yingping1,3, WANG Guilan1 & ZHENG Qiguang2 1. school of Material science and technology, Huazhong university of science and technology, wuhan 430074, china 2. Institute of Laser technology and Engineering, Huazhong university of science and technology, wuhan 430074, china 3. Mechanical Engineering College, Hubei university of technology, wuhan 430068, china 1. school of Material science and technology Huazhong University of Science and Technology Wuhan 430074 China 3. Mechanical Engineering College Hubei University of Technology Wuhan 430068 China 2. Institute of Laser technology and Engineering Huazhong University of Science and Technology Wuhan 430074 China

As a new direct metal prototyping technology,the hybrid plasma and laser deposition manufacturing (PLDM) is proposed in this paper. In order to figure out the characteristics of plasma arc beam and mould in the PLDM process of high temperature alloy, the high speed CCD camera is used to obtain the picture around the plasma arc. Afterwards the sketch of picture is clearly obtained. And the effect of laser parameter, such as average power, pulse width, pulse repetition frequency and the angle between laser beam and plasma arc beam on the plasma arc appearance, is studied experimentally. The results show that the modality of plasma arc beam is markedly influenced by laser beam. And the improvements of shape precision and surface state of the layer deposited by PLDM are confirmed.

关键词： plasma hybrid laser, direct deposition, plasma arc beam, molding character, high-temperature alloy.

Point-Tree Structure Genetic Programming Method for Discontinuous Function's Regression

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wuhan university Journal of Natural sciences 2003年第S1期8卷 323-326页

作者： Xiong Sheng-wu, Wang Wei-wuschool of Computer science and technology, wuhan university of technology, wuhan 430070, Hubei. china wuhan university of technology School of Computer Science and Technology Wuhan Hubei China (GRID:grid.162110.5) (ISNI:***)

A new point-tree data structure genetic programming (PTGP) method is proposed. For the discontinuous function regression problem, the proposed method is able to identify both the function structure and discontinuities points simultaneously. It is also easy to be used to solve the continuous function's regression problems. The numerical experiment results demonstrate that the point-tree GP is an efficient alternative way to the complex function identification problems.

关键词： genetic programming symbolic regression point-tree structure