上海工程技术大学学报

2009, 23(2)

Abstract:

[Abstract](76) [PDF 70KB](181)

3D Parameterization Design of Spring CAD Based on Genetic Algorithm

HU Yi-gang

2009, 23(2): 97-100. doi: 10.3969/j.issn.1009-444X.2009.02.001

Abstract:
Genetic Algorithm is a global optimization auto-adapted probability reconnaissance method and pos-sesses very strong global optimization and search efficiency. The spring parameters were optimized based on Genetic Algorithm. 3D automatic design of the spring was made by GR1P program. Therefore, the optimization design was consistent with the parameterization design.

[Abstract](196) [PDF 194KB](65)

Edge-Banding Cutter with Indexable Insert for Wood Working and Its Cutting Property

YI Hui-jun, QIN Zhe, YUAN Hui, CHEN Han-yuan, ZOU Wei

2009, 23(2): 101-105. doi: 10.3969/j.issn.1009-444X.2009.02.002

Abstract:
Single factor experiment was employed to find out the variational rules of cutting force while milling by edge-banding cutter with indexable insert, and orthogonal experiment was employed to optimize cutting pa-rameters. Based on the data from orthogonal experiment, the cutting force formula was figured out and its ac-curacy was certified.

[Abstract](164) [PDF 252KB](57)

Application Status and Problems of Gas Wall Heater

CHEN Yu, ZHANG Yi, ZHANG Hui

2009, 23(2): 106-110. doi: 10.3969/j.issn.1009-444X.2009.02.003

Abstract:
The gas wall heater has been widely used in recent years because of its better economic benefit and social benefit compared with the traditional heating modes. Most of the gas wall heaters accepted by consumers in China are produced by European countries, therefore the heaters which are popular in the markets are de-signed for natural gas. One of the important problems which appeared during the process of product promotion and utilization is the matching problem between the gas resources and the gas heater designed for natural gas. The relationship between gas property and fire hole diameter of gas heater was discussed based on the Huabai number and interchangeability between natural and artificial gases.

[Abstract](137) [PDF 288KB](54)

Defect Detection of Empty Bottle Surface Based on Machine-Vision

TAN Gang, DONG Xiang-long, XU Ji, WANG Qi

2009, 23(2): 111-114. doi: 10.3969/j.issn.1009-444X.2009.02.004

Abstract:
A specific example was introduced for the application of machine vision to the beer bottle production on-line detection and the structure of machine-vision inspection system. Through image pre-processing and segmentation algorithm, the defects were identified on the measured object and the aim of inspection was achieved.

[Abstract](157) [PDF 224KB](86)

Numerical Simulation of Turbulent Flow Field of Metro Train Head

YANG Bin, SUN Qing-hong, HUANG Wen-jie

2009, 23(2): 115-119,123. doi: 10.3969/j.issn.1009-444X.2009.02.005

Abstract:
According to the theories of structure dynamics and the aerodynamics, based on Navier-stokes and k-ε equations turbulent model, the metro train head aerodynamic model was deduced. The outside flow fields around B-type metro vehicle with streamlined head and three new train heads designed by changing the profile or length of longitudinal projection were simulated with 3-D incompressible viscous fluid theory. This paper analysed metro train's dynamics and pneumatic characteristics and pressure distribution while running in the tunnel, calculated its air resistance coefficient, and optimized the head shape to diminish aerodynamic resistance and made the metro train heads beautiful and full of times sense.

[Abstract](161) [PDF 348KB](128)

Study on Reliability of Engine Cylinder

CAI Jia-ming

2009, 23(2): 120-123. doi: 10.3969/j.issn.1009-444X.2009.02.006

Abstract:
Based on the statistic analysis of engine cylinder wear and maximum vehicle mileage, the distribut-ing rule of cylinder wear was determined through K-S examination and the research method to ascertain the parameter of the membership function for engine cylinder wear failure and engine cylinder reliability was pro-posed by fuzzy entropy. Result of calculation and analysis shows that maximum vehicle mileage is 176 130 km in which the engine cylinder has good reliability and economy.

[Abstract](123) [PDF 194KB](60)

Study on Urine Waste Treatment and Water Reclamation Techniques in Space Station

YU Tao, LI Yong-feng, MA Jun, ZHANG Ji-li, YANG Chuan-ping

2009, 23(2): 124-130. doi: 10.3969/j.issn.1009-444X.2009.02.007

Abstract:
There are high concentrations of TOC, NH3-N and salts in urine waste. The closed loop cycle of urine is important to the Environmental Control and Life Support System (ECLSS) in space station. There are mainly 4 kinds of urine waste treatment and water reclamation techniques, including distillation, advanced oxi-dation, lyophilization and hip-regenerative methods. In this paper, principles, processes, developments and appli-cations of these methods were introduced and discussed. The techniques that should be selected and their corre-sponding problems were presented to designate the direction for investigating and exploring a new style urine waste treatment and water reclamation equipment.

[Abstract](259) [PDF 381KB](112)

Influence of Anion Finishing on Property of Cotton Fabric

LIU Xiao-xia, YUAN Jing, DU Juan

2009, 23(2): 131-135. doi: 10.3969/j.issn.1009-444X.2009.02.008

Abstract:
The influence of concentration of anion agent, curing time, curing temperature and soaking time on anion release, the breathability and the handle of fabrics was analyzed in the finishing cotton fabrics. The ef-fects of finishing were assessed by the sort method of variance analysis. The results show that the textiles fin-ished by anion agents can release a lot of anion and are soft. Compared with the original fabric, the breathabili-ty and wrinkle recovery angle of the finished fabric decrease slightly.

[Abstract](156) [PDF 245KB](69)

2009, 23(2)

Abstract:

[Abstract](72) [PDF 37KB](179)

Flame Retardant, Mechanism and Research Status for Rubber Systems

YANG Ke, WANG Bin, ZHENG Xiao-yu, WANG Jin-cheng

2009, 23(2): 136-141. doi: 10.3969/j.issn.1009-444X.2009.02.009

Abstract:
The combustion process of rubber was summarized. Three key elements and five stages determining the combustion process were put up. Then, the advantages, disadvantages, research and application status at home and abroad of halogen, phosphorus, aluminum-magnesium, silicon, intumescent types of flame-retardant agents were reviewed. Lastly, the future development of the flame-retardant additives were prospected.

[Abstract](172) [PDF 415KB](93)

Research on Application of Nanometer TiO2 Photocatalyst on Textile Fabrics

TIAN Kun, SHEN Yong, WANG Li-ming, WANG Xiao-juan

2009, 23(2): 142-146. doi: 10.3969/j.issn.1009-444X.2009.02.010

Abstract:
The functional finish of textile fabrics with nanometer TiO2 photocatalyst and the ways to act on the textiles were summarized. Methods to improve the dispersibility of nanometer TiO2 in aqueous solution and the binding fastness between TiO2 photocatalyst and fabrics and to reduce the degradation of fabrics were also dis-cussed.

[Abstract](77) [PDF 310KB](79)

Temperature Range of Warm Plastic Deformation of Q235 Steel

HUANG Zhen-li, XU Xin-cheng

2009, 23(2): 147-150. doi: 10.3969/j.issn.1009-444X.2009.02.011

Abstract:
Carbon structural steel Q235 is being widely used in engineering and general machine parts. The study of the structure and forming properties at different plastic molding temperatures plays an important role in the expansion of the size range of Q235 precision forming and realizing the aim of less/non-cutting forming of parts. Through the analysis of the mechanical properties, the degree of oxidation and the structure of Q235 in the plastic forming temperature range, the temperatures of the beginning and final forging were determined.

[Abstract](91) [PDF 266KB](45)

Review on Influence of Active Shielding gas Additives on Shape of TIG Weld Pool

LIU Lei, YU Zhi-shui, CHEN Jie

2009, 23(2): 151-156. doi: 10.3969/j.issn.1009-444X.2009.02.012

Abstract:
Adding active gas in inert shielding gas may control the shape of molten pool effectively, which also makes regulating the contents of oxygen in molten pool easilier. This work reviewed the effect on the shape of molten pool by adding O2 and CO2 respectively in He and Ar shielding gas, and summarized the optimization of additive amount for active gas. This work also discussed shape change degree of welded molten pool under dif-ferent welding processes,which is essentially helpful to give guidance in optimizing production process.

[Abstract](77) [PDF 352KB](54)

Modified Formula of Formation Breakdown Pressure for Perforation Completions of Vertical Wells

LI Pei-chao

2009, 23(2): 157-160. doi: 10.3969/j.issn.1009-444X.2009.02.013

Abstract:
The stress state of perforation holes was re-inspected in this paper, and it is found that the horizon-tal principal stresses should be substituted by the vertical and radial normal stresses. Utilizing the substituting method, the breakdown pressure for one certain position of perforation depth was derived. According to it, the artificial vertical fracture will appear at the base of the perforation,and the corresponding modified formula of formation breakdown pressure for arbitrary perforation completions was given. Comparing the formula with the original formula, we find that the original one can be seen as an approximation of formation breakdown pressure. The results show that the stress condition and actual situation of the perforated formation can be bet-ter reflected in the modified formula, which is applicable to guide drilling and fracturing designs of oilfields.

[Abstract](90) [PDF 163KB](43)

Pressure Distribution of Bra Cup Based on Different Design Elements

MENG Li-hua, XIE Hong

2009, 23(2): 161-164. doi: 10.3969/j.issn.1009-444X.2009.02.014

Abstract:
The article focused on the bra cup pressure distribution. The pressure tests were carried out with the help of the pressure measuring set when eight different bra samples and four key pressure measurement points were chosen. According to the tests, the impact of pressure distribution was discussed. The results show that the broken joints of the cup can have impact on the pressure distribution by changing the position of the parti-tion line.

[Abstract](90) [PDF 220KB](42)

Trial Development of Web-SSO Model Based on CAS

ZHOU Wen-jing

2009, 23(2): 165-169. doi: 10.3969/j.issn.1009-444X.2009.02.015

Abstract:
To the problem of \"Identity Integration\" in the construction of enterprise unified portal platform, SSO(Single Sign-On) solution was put forward. First, issues about Web-SSO basic structure and its implement condition were discussed. Next, CAS, open source SSO tool, was introduced. And then, the detailed description of CAS Protocol Model, its flow of SSO and analysis of its security were given. Finally, the trial development of SSO model based on CAS was made by simple setting configuration and Java coding.

[Abstract](77) [PDF 262KB](42)

Contour Extraction of Rail Based on Image Processing

LI Li-ming, CHAI Xiao-dong, ZHENG Shu-bin

2009, 23(2): 170-173,190. doi: 10.3969/j.issn.1009-444X.2009.02.016

Abstract:
Contour extraction and the key point selection of the rail cross-section were mainly discussed. Con-tour extraction was realized by using power transformation nonlinear operation to pixel. Location of cross-sec-tion image initiation point and thinning of contour line met the requirement of accuracy and speed.

[Abstract](138) [PDF 272KB](56)

A Class of Filled Function Method with One Parameter

LI Ming-ming

2009, 23(2): 174-176. doi: 10.3969/j.issn.1009-444X.2009.02.017

Abstract:
The filled function method is an approach for solving unconstrained global minimization problem. The key element of this method is to construct filled functions. In this paper, a filled function with only one parameter is introduced. And the filled function method is proposed for the problem of unconstrained global op-timization.

[Abstract](178) [PDF 126KB](42)

Evaluation of Arbitrage Opportunity in Per-duration Stock Market

XIAO Xiang, XU Bo-sheng, LI Lu

2009, 23(2): 177-180. doi: 10.3969/j.issn.1009-444X.2009.02.018

Abstract:
With the study on the per-duration stock market, the linear equation system was introduced so as to evaluate whether there exists the arbitrage opportunity. Besides,dealing with the solution of such system the trading strategies of the arbitrage were presented. Finally, based on the Farkas' theory, a sufficient condition concerning the relationship between the arbitrage opportunity and risk neutral probability was offered.

[Abstract](150) [PDF 150KB](41)

Irreducibility of Generalized Baby Verma Module for sl(4, k)

LI Yi-yang

2009, 23(2): 181-183. doi: 10.3969/j.issn.1009-444X.2009.02.019

Abstract:
The irreducibility of generalized baby Verma modules was studied for sl(4, k) over prime field. By looking for the maximal weight vectors of generalized baby Verma modules, the irreducibility of generalized baby Verma modules was decided for sl(4, k) when the regular highest weight lies in the different alcoves.

[Abstract](43) [PDF 120KB](40)

Convergence of Ishikawa Iterative Sequences with Errors for Asymptotically Nonexpansive Mappings

LIU Rui-juan, XIAO Xiang

2009, 23(2): 184-186. doi: 10.3969/j.issn.1009-444X.2009.02.020

Abstract:
This paper mainly shows that sufficient and necessary conditions of nonempty fixed points and suffi-cient and necessary conditions of the modified Ishikawa iteration sequences with errors converged to fixed points for asymptotically nonexpansive mappings of a nonempty closed convex subset in an uniformly convex Banach space. The results presented also extended and improved some recent results.

[Abstract](106) [PDF 122KB](68)

Human Capital, Tax and Stochastic Economic Growth

HU Yuan-bo

2009, 23(2): 187-190. doi: 10.3969/j.issn.1009-444X.2009.02.021

Abstract:
Based on the stochastic optimization method, the effect of education investment and taxation on eco-nomic growth and social welfare was analyzed in a stochastic economic growth model. The optimized economic growth rate and the ratios of capital to wealth and consumption to wealth were worked out through the Bell-man equation when economic equilibrium reached. Furthermore, how taxation and individual education invest-ment affect economic equilibrium growth rate and social welfare was analyzed.

[Abstract](80) [PDF 174KB](78)

2009 Vol. 23, No. 2