上海工程技术大学学报

2021 Vol. 35, No. 3

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Material Science and Engineering
Advanced Manufacturing and Intelligent Control
Textile Chemical Engineering and Environment
Mathematical Sciences and Application

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Material Science and Engineering

Fracture analysis of ductile fracture of AA6063 aluminum alloy

LI Hanlin, HE Tao, HUO Yuanming, GAO Jianye, LI Shiqian, JIA Dongsheng

2021, 35(3): 197-200.

Abstract:
In order to explore the ductile fracture mechanism of AA6063 aluminum alloy, a series of ductile fracture tests were carried out, and the ductile fracture morphology of AA6063 aluminum alloy specimens under different stress triaxiality was observed. The results show that the higher the stress triaxi...

[Abstract](843) [FullText HTML] (1308) [PDF 938KB](555) [Cited by] (8)

Application of glass and glass-ceramics in solid oxide fuel cell

WANG Kun, SU Yu

2021, 35(3): 201-207.

Abstract:
The application requirements of glass and glass-ceramics as solid oxide fuel cell (SOFC) sealing materials were described. An attempt was made to classify the glass and glass-ceramics used in SOFC, and the sealing glasses for SOFC based on different systems (silicate sealing, borosilicate sealing, a...

[Abstract](920) [FullText HTML] (406) [PDF 961KB](482) [Cited by] (2)

Effect of quenching and partitioning process on texture and properties of high strength Q&P steel

LI Boyan, SU Yu, ZUO Zhicheng, LI Jun

2021, 35(3): 208-214.

Abstract:
The microstructure, texture, mechanical properties and tensile fracture characteristics of quenching and partitioning (Q&P) steel were studied at different quenching temperatures (220, 260, 300 ℃) and quenching times (60 , 120 , 180 s) in one-step Q&P process. The results show that the maxim...

[Abstract](668) [FullText HTML] (415) [PDF 1360KB](260) [Cited by] (2)

Research status of dissimilar welding-brazing of aluminum to copper

XU Wenhu, YANG Jin, XIAO Ming, PENG Mingjian, ZHAO Yixuan, LIU Hongbing, LU Hanlong

2021, 35(3): 215-228.

Abstract:
Due to the great difference in physical and chemical properties between aluminum alloy and copper dissimilar metals, the strong oxidation property of aluminum alloy and other factors, it has become a difficult point in the welding field of dissimilar metals joining. The research status of aluminum/c...

[Abstract](883) [FullText HTML] (904) [PDF 2282KB](407) [Cited by] (5)

Advanced Manufacturing and Intelligent Control

Dynamic modeling and analysis of diesel engine valve mechanism

ZHOU Yufeng, ZHANG Haibo, ZHANG Hengyun

2021, 35(3): 229-236.

Abstract:
Finite element analysis of engine valve mechanism is very necessary in modern mechanical design as an important support for basic experiment. Aiming at the optimal design of the performance for in-line four-cylinder diesel valve mechanism, the key thermodynamic and dynamic parameters of diesel engin...

[Abstract](613) [FullText HTML] (413) [PDF 1207KB](279) [Cited by] (4)

Research on target tracking based on improved optical flow method

LIU Xiangqian, YAN Juan, YANG Huibin, JIA Xiwei

2021, 35(3): 237-242.

Abstract:
In view of the low operating efficiency of the optical flow method in tracking motion video sequences and the problem that the video sequence can only be processed in real time, designing a method based on optimized particle filter and optical flow method. Firstly, the algorithm strategy uses the me...

[Abstract](809) [FullText HTML] (1017) [PDF 1429KB](1092) [Cited by] (24)

Customer interruption cost estimation model based on bidirectional search algorithm

HU Jincai, ZHANG Jing, WANG Dalong, LYU Wei, OUYANG Wenan

2021, 35(3): 243-247.

Abstract:
Accurate and fast estimation of customer interruption cost plays an important role in distribution network optimization and planning. A customer interruption cost estimation model based on bidirectional search algorithm was proposed, the bidirectional search algorithm was combined with the customer ...

[Abstract](448) [FullText HTML] (491) [PDF 680KB](267)

Study on reliability of metro vehicle doors based on exponential distribution and RAMS

ZONG Zhixiang

2021, 35(3): 248-252.

Abstract:
For the purpose of preventing and reducing metro door failures, an exponential distribution function was used to analyze the door failure time intervals based on statistical data of three-year door failures on Shanghai metro line 13. Combined with the reliability theory in RAMS, the reliability of d...

[Abstract](578) [FullText HTML] (468) [PDF 884KB](187) [Cited by] (3)

Textile Chemical Engineering and Environment

Ethanol conversion over La₂O₂CO₃/ZnO catalysts prepared by two methods: Effect of macroporous structure and basic sites

YU Hongyan, SHIN Eunwoo, MEN Yong

2021, 35(3): 253-258.

Abstract:
In this work, we prepared the La₂O₂CO₃/ZnO catalysts by two different methods-co-precipitation and ethylene glycol combustion method, whose catalytic performance of the dehydrogenation of ethanol to acetaldehyde as well as materials’ properties related to the catalytic behavior through FE−SEM, HR−TE...

[Abstract](398) [FullText HTML] (407) [PDF 1852KB](339)

Review on influencing factors of green clothing purchasing behavior

LIU Xin, FANG Yuan, LI Pei

2021, 35(3): 259-265.

Abstract:
In order to understand the formation mechanism of consumers’ green clothing purchasing behavior, relevant domestic and foreign researches on green clothing purchasing behavior were sorted out. The definition of green clothing purchasing behavior was reviewed, and influencing factors of green clothin...

[Abstract](659) [FullText HTML] (515) [PDF 715KB](427) [Cited by] (1)

Mathematical Sciences and Application

Objective Bayesian analysis of zero-and-one-inflated geometric distribution

XIAO Xiang, GU Xi

2021, 35(3): 266-271.

Abstract:
Count datas with excess zeros and ones arise frequently in various fields such as medical health, finance and securities. In order to fit these datas better, a zero-and-one-inflated geometric distribution model was proposed and the objective Bayesian analysis was carried out. Based on parameter tran...

[Abstract](609) [FullText HTML] (452) [PDF 659KB](420) [Cited by] (3)

Dynamics characteristics of circular restricted three-body problem

LIU Wenfang, HU Shiyang, LIU Fuyao

2021, 35(3): 272-280.

Abstract:
The forbidden zone has a significantly important influence on the motion of the third body in the circular restricted three-body problem. Based on zero-velocity curves, the relationship between the forbidden zone of celestial bodies and dynamical parameters was discussed. It was obtained that the fo...

[Abstract](873) [FullText HTML] (567) [PDF 1223KB](263)

Application of randomized low-rank approximation algorithm in recommendation system

CHEN Xi, DENG Jiechen, XI Shihong, LIU Xiaochen, ZHANG Xiangjun, FENG Yuehua

2021, 35(3): 281-284.

Abstract:
In view of the problem that with increasing large amount of datas in a recommendation system, the computing efficiency of its corresponding matrix completion algorithms need to be improved. Based on randomized algorithm strategy and efficient data access requirements, a new algorithm for solving mat...

[Abstract](461) [FullText HTML] (336) [PDF 690KB](293) [Cited by] (2)

E-commerce infringement monitoring system based on big data and machine learning algorithm engine

LI Jiaqi, DONG Xiangxu, LI Yunxia

2021, 35(3): 285-289.

Abstract:
Based on big data and machine learning algorithm engine, a design scheme of intellectual property dynamic monitoring network system for e-commerce platform was put forward. Focusing on the design of big data remote acquisition system, real-time data monitoring and analyzing platform as well as the c...

[Abstract](628) [FullText HTML] (379) [PDF 2038KB](423) [Cited by] (1)

An empirical research on regional development of higher vocational education based on factor analysis

ZHANG Ruijuan, YI Li, LU Jiahua

2021, 35(3): 290-294.

Abstract:
Focusing on “expansion and quality improvement” of higher vocational education, factor analysis method and provincial cross-section data were used to conduct empirical research on the regional development of China’s higher vocational education from three dimensions of school scale, school quality an...