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Determinants of moderate to vigorous physical activity and obesity in children:a structural equation modeling analysis

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World Journal of Pediatrics 2016年第2期12卷 170-176页

作者： daniel chi-shing yeung Xin Yuan Stanley Sai-Chuen Hui shingairai Aliifi na Feresu Department of Epidemiology and Biostatistics School of Public HealthIndiana UniversityUSA Department of Counseling and Educational Psychology School of EducationIndiana UniversityUSA Department of Sports Science and Physical Education The Chinese University of Hong KongShatinHong KongChina School of Health Systems and Public Health Biostatistics and EpidemiologyFaculty of MedicineUniversity of PretoriaSouth Africa

Background:The determinants of physical activity(PA)and body fatness in chinese adolescents are rarely *** study aimed to investigate the effect of attitude toward PA,screen time,parents'socioeconomic status(SES),and exercise habit on PA and body fatness among chinese children by using structural equation modeling(SEM)***:Data obtained from the second Community Fitness Survey in Hong Kong region were utilized,in which students from one secondary school of each of the 18 districts of Hong Kong were recruited.A total of 2517 questionnaires with physical fitness items were successfully distributed to students aged 13-19 years in these ***'SES,parents'exercise habit,children's intention to participate in PA,amount of moderate to vigorous PA(MVPA),screen time,children's attitude toward PA,and children's body fat percentage were measured and analyzed with *** structural equation model was composed of a measurement model and a structural *** model was tested with Mplus *** chi-square test,root mean square error of approximation,comparative fi t index,and Tucker-Lewis index were calculated to evaluate model *** model was then modifi ed based on the model fi t ***:children's intention to participate in PA was a strong predictor of their engagement in ***'exercise habit had both direct and indirect(via attitude)effects on their children's intention to participate in *** time was not a predictor of body ***'s intention to participate in PA directly affected their body ***'s attitude toward PA,parents'exercise habit,and SES had signifi cant effects on the children's intention to participate in ***,obesity had a negative effect on the children's attitude toward ***:To promote MVPA and prevent obesity in chinese children of Hong Kong region,it is important to design intervention that enhances children's intention and attitude in PA,as well as pa

关键词： adolescent obesity behavior childhood obesity physical activity socioeconomic factors

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Effects of body mass and sex on kinematics and kinetics of the lower extremity during stair ascent and descent in older adults

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Sports Medicine and Health Science 2021年第3期3卷 165-170页

作者： Nok-Hin Law Jing Xian Li Nok-yeung Law daniel Varin Mario Lamontagne School of Human Kinetics University of OttawaOttawaOntarioCanada

The effects of body mass and sex on lower limb biomechanics during ascent and descent were examined in participants aged 50 to 75 with normal weight(n=19),overweight(n=18),and obese(n=8).Peak joint angles and joint moment of the lower limb were analyzed with the VICON motion analysis *** from multivariate analysis of variance showed that during descent,the overweight participants had significantly higher knee extensor moment(0.98±0.30 N·m/kg^(-1))than the normal-weight participants(0.70±0.29 N·m/kg^(-1)).The obese group had significantly higher ankle abductor moment(0.21±0.11 N·m/kg^(-1))than the normal weight(0.12±0.08 N·m/kg^(-1))and overweight groups(0.09±0.06 N·m/kg^(-1)).During ascent,the obese participants had significant higher hip flexor moment(0.42±0.20 N·m/kg^(-1))than overweight participants(0.22±0.17 N·m/kg^(-1)).Significant sex differences were found in knee extension angles(4.2±3.4℃vs 7.0±3.3℃)during descent,plantar flexion angles during ascent(23.7±5.3℃vs 15.6±3.7℃)and descent(29.9±5.0℃vs 22.1±7.9℃),and ankle adduction angles(6.8±4.8℃vs 2.5±2.5℃)during *** is concluded that body mass has significant impact on joint loading of lower limbs during stair *** overweight and obese increased hip joint loading during ascent,and knee and ankle joint loading during descent in older *** difference in joint kinematics was presented during stair walking regardless of the body mass.

关键词： Joint moment Range of motion Obesity Overweight Joint angles

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通过全局核降低高斯核的局部风险与基于遗传算法的两阶段模型选择

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计算机研究与发展 2007年第3期44卷 439-444页

作者：常群王晓龙林沂蒙 daniel S.yeung 陈清才哈尔滨工业大学计算机科学与技术学院哈尔滨150001 哈尔滨工业大学深圳研究生院媒体与生命科学计算实验室深圳518055

支持向量分类时,由于样本分布的不均匀性,单宽度的高斯核会在空间的稠密区域产生过学习现象,在稀疏区域产生欠学习现象,即存在局部风险.针对于此,构造了一个全局性次核来降低高斯核产生的局部风险.形成的混合核称为主次核.利用幂级数构... 详细信息

支持向量分类时,由于样本分布的不均匀性,单宽度的高斯核会在空间的稠密区域产生过学习现象,在稀疏区域产生欠学习现象,即存在局部风险.针对于此,构造了一个全局性次核来降低高斯核产生的局部风险.形成的混合核称为主次核.利用幂级数构造性地给出并证明了主次核的正定性条件,进一步提出了基于遗传算法的两阶段模型选择算法来优化主次核的参数.实验验证了主次核和模型选择算法的优越性.

关键词：支持向量机主次核高斯核两阶段模型选择

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支持向量分类和多宽度高斯核

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电子学报 2007年第3期35卷 484-487页

作者：常群王晓龙林沂蒙王熙照 daniel S.yeung 哈尔滨工业大学计算机科学与技术学院黑龙江哈尔滨150001 哈尔滨工业大学深圳研究生院媒体与生命科学实验室广东深圳518055

支持向量分类中,高斯核不区分样本中各个特征的重要性,显然各个特征对分类的贡献一般是不相同的.为了体现这种差别从而提高支持向量机的泛化性能,文中提出了多宽度高斯核的概念.多宽度高斯核增加了支持向量机的超级参数,进一步地,文中... 详细信息

支持向量分类中,高斯核不区分样本中各个特征的重要性,显然各个特征对分类的贡献一般是不相同的.为了体现这种差别从而提高支持向量机的泛化性能,文中提出了多宽度高斯核的概念.多宽度高斯核增加了支持向量机的超级参数,进一步地,文中提出了多参数模型选择算法.算法利用误差界自动实现模型选择.通过实验验证了多宽度高斯核和多参数模型选择算法的有效性.

关键词：支持向量机多宽度高斯核多参数模型选择误差界

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A MULTIPLE INTELLIGENT AGENT SYSTEM FOR CREDIT RISK PREDICTION VIA AN OPTIMIZATION OF LOCALIZED GENERALIZATION ERROR WITH DIVERSITY

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Journal of Systems Science and Systems Engineering 2007年第2期16卷 166-180页

作者： daniel S. yeung Wing W. Y. NG Aki P. F. CHAN Patrick P. K. CHAN Michael FIRTH Eric C. C. TSANG Media and Life Science Computing Laboratory Shenzhen Graduate School Harbin Institute of Technology Shenzhen 518055 China Department of Computing Hong Kong Polytechnic University Hong Kong China Department of Finance and Insurance Lingnan University Hong Kong

Company bankruptcies cost billions of dollars in losses to banks each year. Thus credit risk prediction is a critical part of a bank＇s loan approval decision process. Traditional financial models for credit risk prediction are no longer adequate for describing today＇s complex relationship between the financial health and potential bankruptcy of a company. In this work, a multiple classifier system （embedded in a multiple intelligent agent system） is proposed to predict the financial health of a company. In our model, each individual agent （classifier） makes a prediction on the likelihood of credit risk based on only partial information of the company. Each of the agents is an expert, but has limited knowledge （represented by features） about the company. The decisions of all agents are combined together to form a final credit risk prediction. Experiments show that our model out-performs other existing methods using the benchmarking Compustat American Corporations dataset.

关键词： Credit rating business intelligence localized generalization error multiple classifier system feature grouping

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Development of a Fuzzy Fire Risk Evaluation Model for Building Construction Sites in Hong Kong

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Journal of Construction Research 2021年第2期3卷 27-42页

作者： John F.Y.yeung daniel W.M.Chan Division of Business College of International EducationSchool of Continuing EducationHong Kong Baptist UniversityHong KongChina Department of Building and Real Estate The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

Earlier research works on fire risk evaluation indicated that an objective,reliable,comprehensive,and practical fire risk evaluation model is essential for mitigating fire occurrence in building construction ***,real empirical studies in this research area are quite *** journal paper gives an account of the second stage of a research study aiming at developing a fuzzy fire risk evaluation model for building construction sites in Hong *** empirical research findings showed that the overall fire risk level of building construction sites is 3.6427,which can be interpreted as“moderate risk”.Also,the survey respondents perceived that“Restrictions for On-Site Personnel”is the most vital fire risk factor;with“Storage of Flammable Liquids or Dangerous Goods”being the second;and“Attitude of Main Contractor”the *** proposed fuzzy fire risk evaluation model for building construction sites can be used to assess the overall fire risk level for a building construction site,and to identify improvement areas *** the fuzzy fire risk evaluation model was developed domestically in Hong Kong,the research could be reproduced in other nations to develop similar models for international *** an extension would provide a deeper understanding of the fire risk management on building construction sites.

关键词： Fire risk evaluation Reliability interval method Fuzzy set Fuzzy synthetic evaluation Building construction sites Hong Kong

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公司治理，经济设防与经济增长(下)

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管理世界 2010年第4期26卷 149-165页

作者： Randall Morck daniel Wolfenzon Bernard yeung 杨贤(译) 卢昌崇(译) 阿尔伯特大学及国家经济调研局纽约大学斯德恩商学院及国家经济调研局新加坡国立大学东北财经大学工商管理学院不详

（七）政治经济学视角的考虑尽管几乎每一个国家都存在着不平等的现象，但上述表明，金字塔控制将财富上的巨额不平等进一步放大，使之在公司控制权方面也出现了事实上的巨大差距和不平等。金字塔控制实际上是将许多国家多数企业的治理... 详细信息

（七）政治经济学视角的考虑尽管几乎每一个国家都存在着不平等的现象，但上述表明，金字塔控制将财富上的巨额不平等进一步放大，使之在公司控制权方面也出现了事实上的巨大差距和不平等。金字塔控制实际上是将许多国家多数企业的治理权托付给少数精英和现有的家族来行使，而这些人在很大程度上就是寡头政治。公司治理权集中的程度是衡量具有两个极点的资本主义经济的尺度。

关键词：公司治理经济增长设防资本主义经济寡头政治经济学视角公司控制金字塔

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公司治理，经济设防与经济增长(上)

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管理世界 2010年第3期26卷 150-167页

作者： Randall Morck daniel Wolfenzon Bernard yeung 杨贤卢昌崇(译) 阿尔伯特大学及国家经济调研局纽约大学斯德恩商学院及国家经济调研局纽约大学斯德恩商学院东北财经大学工商管理学院

在英美以外的国家，大型股份公司通常都由那些身价百亿的家族来控制。金字塔式结构、交叉持股和超权股使得这些家族能够“四两拨千斤”，实现对企业的控制，与其资本投资额并不般配。结果是，很多国家的国民经济也主要由这样几个少数家... 详细信息

在英美以外的国家，大型股份公司通常都由那些身价百亿的家族来控制。金字塔式结构、交叉持股和超权股使得这些家族能够“四两拨千斤”，实现对企业的控制，与其资本投资额并不般配。结果是，很多国家的国民经济也主要由这样几个少数家族来控制。这就产生了3个问题。

关键词：经济增长公司治理设防股份公司金字塔式交叉持股国民经济家族

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Further Results on Robust Nonlinear H∞ Control

Further Results on Robust Nonlinear H∞ Control

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第十九届中国控制会议

作者： daniel W．C．Ho L．F．yeung Department of Mathematics City University of Hong KongHong Kong Department of Electronic Engineering City University of Hong KongHong Kong

＜正＞This paper addresses robust H ∞ control problem for nonlinear systems with matched parameter uncertainty. The necessary and sufficient conditions for existence of global strong robust H ∞ dynamic compensators and static state feedback controllers are obtained based on nonlinear matrix inequality （NLMI） approach. It reduces a robust H ∞ control problems to a standard H ∞ problem for an auxiliary nonlinear systems.

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第七届“道风学术奖”颁奖信息

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圣经文学研究 2022年第2期 303-305页

作者：熙楠不详

中国香港汉语基督教文化研究所自1999年起设立“道风学术奖”,以表彰汉语学者在基督宗教研究领域的优秀建树。学术奖共设两项,“徐光启奖”是原创学术著作奖,“艾香德奖”是最佳学术翻译奖。该奖项迄今已举办六届。

关键词：基督宗教艾香德学术翻译学术奖徐光启中国香港基督教学术著作

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