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Prediction of thermal conductivity of polymer-based composites by using support vector regression

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Science China(Physics,Mechanics & Astronomy) 2011年第5期54卷 878-883页

作者： wang guilian CAI CongZhong PEI JunFang ZHU XingJian Department of Applied Physics Chongqing University Chongqing 400044 China

Support vector regression (SVR) combined with particle swarm optimization (PSO) for its parameter optimization, was proposed to establish a model to predict the thermal conductivity of polymer-based composites under different mass fractions of fillers (mass fraction of polyethylene (PE) and mass fraction of polystyrene (PS)). The prediction performance of SVR was compared with those of other two theoretical models of spherical packing and flake packing. The result demonstrated that the estimated errors by leave-one-out cross validation (LOOCV) test of SVR models, such as mean absolute error (MAE) and mean absolute percentage error (MAPE), all are smaller than those achieved by the two theoretical models via applying identical samples. It is revealed that the generalization ability of SVR model is superior to those of the two theoretical models. This study suggests that SVR can be used as a powerful approach to foresee the thermal property of polymer-based composites under different mass fractions of polyethylene and polystyrene fillers.

关键词： polymer matrix composites thermal conductivity support vector regression regression analysis prediction

A Comparative Study on the Avoidance in College English

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Sino-US English Teaching 2018年第4期15卷 192-197页

作者： wang guilian University of Shanghai for Science and Technology(USST) ShanghaiChina

It is quite common that College students’writings are often loaded of ordinary words and monotonous sentence patterns because they often deliberately avoid some language structures and *** kind of sketchy and hollow writings may hinder the improvement of English writing *** paper first researches this avoidance phenomenon from three aspects:lexis,syntax,and discourse,then explores the reasons behind it,and finally puts forth some instructive suggestions for improving this condition.

关键词： avoidance college English writing comparative analysis

Analysis of microscopic pore structures of rocks before and after water absorption

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Mining Science and Technology 2011年第2期21卷 287-293页

作者： Li Dejian wang guilian Han Liqiang Liu Peiyu He Manchao Yang Guoxing Tai Qimin Chen Cheng State Key Laboratory of Geomechanics and Deep Underground Engineering Beijing 100083 China Institute of Geotechnical Engineering China University of Mining ＆ Technology Beijing 100083 China Sichuan Staff University of Science and Technology Sichuan 610101 China Engineering Research Institute of General Armament Department Beijing 100083 China

Hydrophilic characteristics of rocks are affected by their microscopic pore structures,which clearly change after water *** absorption tests and scanning electron microscopic（SEM） experiments on rock samples,located at a site in Tibet,China,were carried out Changes of rock pore structures before and after water absorption were studied with the distribution of pore sizes and fractal characteristics of *** results show that surface porosities,fractal dimensions of pores and the complexity of pore structures increased because the number of new small pores produced increased or the original macropore flow channels were expanded after rocks absorbed *** were points of inflection on their water absorption *** water absorption of other rocks,surface porosities and fractal dimensions of pores and complexity of pore structures decreased as the original pore flow channels became *** absorption curves did not *** porosity and the pore fractal dimensions of rocks have good linear relationships before and after water absorption.

关键词： Hydrophilic characteristics Pore structures Pore size distribution Pore fractal characteristics

Humanistic Approach and Affective Factors in Foreign Language Teaching

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Sino-US English Teaching 2005年第5期2卷 1-5页

作者： guilian wang University of Shanghai for Science and Technology

In foreign language teaching, there appear a lot of approaches. This essay lays special stress on humanistic approach and analyses the influence of some important affective factors on language learning, for the purpos... 详细信息

关键词： humanistic approach affective factors foreign language teaching

Kitty’s Awakening of Female Consciousness in The Painted Veil

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Sino-US English Teaching 2020年第7期17卷 217-220页

作者： YANG Bailian wang guilian University of Shanghai for Science and Technology ShanghaiChina

William Somerset Maugham is a controversial English author whose works are often ironic and profound in exposing *** Painted Veil is a novel completed after his trip to *** paper focuses on the analysis of Kitty’s aw... 详细信息

关键词： William Somerset Maugham The Painted Veil female consciousness

Researches on the Differences of Kinship Systems

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Sino-US English Teaching 2019年第6期16卷 235-239页

作者： YAO Jiaying wang guilian University of Shanghai for Science and Technology Shanghai China

Kinship system is the way to determine the family members. Based on the Whorfian Hypothesis, this paper takes Chinese and English kinship terms as the research object to make an analysis about the relationship between language and culture from the perspective of sociolinguistics, expecting to find out the major differences and explore the factors leading to them.

关键词： language culture kinship system

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皮质骨超声振动辅助磨削力仿真与研究

天津理工大学学报 2025年第1期41卷 10-15页

作者：朱玉莹郑清春张春秋张善青王桂莲胡亚辉天津理工大学天津市先进机电系统设计与智能控制重点实验室天津理工大学机电工程国家级实验教学示范中心

在开颅手术中，磨削作为传统精密加工方法可以实现骨组织的高效切除。针对过大的磨削力容易造成骨裂纹、骨组织损伤这一问题，基于普通磨削与超声振动辅助磨削运动学方程，建立皮质骨超声振动辅助磨削有限元仿真模型，结合试验结果获得... 详细信息

在开颅手术中，磨削作为传统精密加工方法可以实现骨组织的高效切除。针对过大的磨削力容易造成骨裂纹、骨组织损伤这一问题，基于普通磨削与超声振动辅助磨削运动学方程，建立皮质骨超声振动辅助磨削有限元仿真模型，结合试验结果获得磨削参数和超声振动参数与磨削力的二次回归预测模型，研究磨削速度、磨削深度和超声振幅对磨削力的影响。结果表明：磨削力随着磨削速度与磨削深度的增加而增加；在选取的超声振幅范围内，随着超声振幅的增加，磨削力先减小后略有增大；合理地选择磨削参数可以有效降低磨削力。

关键词：皮质骨磨削超声振动磨削力响应面分析

一个并非民权运动领袖的黑人领袖——论马尔科姆·爱克斯与美国黑人民权运动的关系

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世界民族 2010年第6期 86-93页

作者：王桂莲南开大学历史学院

马尔科姆.爱克斯在早期是极端的黑人民族主义者,他追求的并不是黑人在美国当时的体制内获得平等的公民权,而是要建立独立的国中之国——伊斯兰国,并对黑人民权运动持批评态度。马尔科姆的晚期思想则远远超越了美国黑人民权运动范畴,他... 详细信息

马尔科姆.爱克斯在早期是极端的黑人民族主义者,他追求的并不是黑人在美国当时的体制内获得平等的公民权,而是要建立独立的国中之国——伊斯兰国,并对黑人民权运动持批评态度。马尔科姆的晚期思想则远远超越了美国黑人民权运动范畴,他以人权为最高斗争目标,努力争取使美国黑人斗争国际化,并将这场斗争视为世界范围内反殖民主义、反资本主义大业的一部分。因此,就马尔科姆.爱克斯的一生而言,不能将其简单地划入20世纪中期美国黑人民权运动的营垒。尽管他是一位对黑人民权运动产生了重要影响的伟大黑人领袖,但他并不是这场运动的领袖。

关键词：马尔科姆·爱克斯黑人民权运动伊斯兰国人权

基于多目标模糊优化的非H封闭式周转轮系参数化计算机辅助设计

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机械工程学报 2007年第7期43卷 32-38页

作者：周欣周海波王桂莲马旭佳木斯大学机械工程学院佳木斯154007 吉林大学生物与农业工程学院长春130025

研究能够实现较大传动比、较大功率、较高效率且结构简单、紧凑的非H封闭式周转轮系的建模、多目标多约束模糊优化设计、相配套的装配图及主要零件图的参数化设计。在对非H封闭式周转轮系的结构类型和特点进行分析的基础上,提出以体积... 详细信息

研究能够实现较大传动比、较大功率、较高效率且结构简单、紧凑的非H封闭式周转轮系的建模、多目标多约束模糊优化设计、相配套的装配图及主要零件图的参数化设计。在对非H封闭式周转轮系的结构类型和特点进行分析的基础上,提出以体积小、效率高为目标的模糊优化设计数学模型,实现模糊因素的非模糊化处理。优化设计结果表明:利用多目标多约束的模糊优化设计方法,既考虑到轮系的整体性能,又考虑到目标和约束的模糊性,可使优化设计的整体目标水平达到更高。应用计算机辅助设计(CAD)技术,规范此类轮系的设计过程,编制非H封闭式周转轮系参数化CAD软件,实现该类复合轮系的参数化设计。

关键词：周转轮系参数化设计最优化多目标模糊集