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- 저자 : Yichao WU (검색결과 5 건)
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A gender-based analysis of multidimensional poverty in China
Yichao WU,Di QI 이화여자대학교 아시아여성학센터 2017 Asian Journal of Women's Studies(AJWS) Vol.23 No.1
This paper investigates the multidimensional status of poverty in China using a gender framework. Five dimensions of deprivation were selected—health, nutrition, housing, education and income—in order to measure the severity of Chinese women’s poverty. Chinese Family Panel Studies (CFPS) were a source of rich information on individuals’ material wellbeing for this analysis. There are three main findings in this study: women are significantly more vulnerable to suffer from severe deprivation than men in China, especially with respect to the primary education, body mass index (BMI) and health conditions; in terms of multidimensional poverty status, women have a worse performance than men on average, with huge differences between rural and urban regions and among different provinces; many personal and household characteristics significantly shape women’s poverty experiences, as seen via the fixed effect logistic regression model.
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Minggao Tan,Yichao Lian,Houlin Liu,Xianfang Wu,Rong Ding 대한조선학회 2018 International Journal of Naval Architecture and Oc Vol.10 No.1
As the key equipment in deep ocean mining, the slurry pump suffers from wear and blocking problems. In this paper, high-speed photography technique is applied to track the movement rule of single particle of the coarse particle solideliquid two-phase flow in a double blade slurry pump. The influences of particle diameter and particle density on the pass-through and collision characteristics of particles are analyzed as well. The results show that the average of the passing pump time first decreases and then increases when the particle diameter increases. The average of the passing pump time decreases by 22.7%, when the particle density increases from 1.09 g/cm3 to 1.75 g/cm3. Besides, the particle density has great influence on the location where the particle hits the tongue. Most particles of 1.09 g/cm3 hit the tongue on the left side, while collision location of particles of 1.75 g/cm3 is mainly on the top and at the right side of the tongue. The research can provide a basis for the optimization design of slurry pump in deep ocean mining system.
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Applying Biotope Concepts and Approaches for Sustainable Environmental Design
Yan Huang,Yichao Ma,Wenting Wu,Qinzhi Lv 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.5
Depletion of natural resources and habitat destruction has led to changes in ecosystems from the global to the local scale. For this reason, numerous theories and methods from landscape ecology have emerged and applied in sustainable landscape planning and design, including meso-and micro-scale biotope design. Although many research on biotope effectively promoting biodiversity conservation, the concept of biotope and the biotope approaches in sustainable environmental design have not been well depicted. In the present study, we propose a basic process of biotope design and several key points of design in response to increasing ecological pressure from urban areas or rural areas. We believe this conceptual method will contribute an essential tool to address the spatial dimension for achieving socio-economic and ecological sustainability.
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Shin, Seung Jun,Wu, Yichao,Zhang, Hao Helen,Liu, Yufeng Oxford University Press 2017 Biometrika Vol.104 No.1
<P><B>SUMMARY</B></P><P>Sufficient dimension reduction is popular for reducing data dimensionality without stringent model assumptions. However, most existing methods may work poorly for binary classification. For example, sliced inverse regression (Li, 1991) can estimate at most one direction if the response is binary. In this paper we propose principal weighted support vector machines, a unified framework for linear and nonlinear sufficient dimension reduction in binary classification. Its asymptotic properties are studied, and an efficient computing algorithm is proposed. Numerical examples demonstrate its performance in binary classification.</P>
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Tan, Minggao,Lian, Yichao,Liu, Houlin,Wu, Xianfang,Ding, Rong The Society of Naval Architects of Korea 2018 International Journal of Naval Architecture and Oc Vol.10 No.1
As the key equipment in deep ocean mining, the slurry pump suffers from wear and blocking problems. In this paper, high-speed photography technique is applied to track the movement rule of single particle of the coarse particle solid-liquid two-phase flow in a double blade slurry pump. The influences of particle diameter and particle density on the pass-through and collision characteristics of particles are analyzed as well. The results show that the average of the passing pump time first decreases and then increases when the particle diameter increases. The average of the passing pump time decreases by 22.7%, when the particle density increases from $1.09g/cm^3$ to $1.75g/cm^3$. Besides, the particle density has great influence on the location where the particle hits the tongue. Most particles of $1.09g/cm^3$ hit the tongue on the left side, while collision location of particles of $1.75g/cm^3$ is mainly on the top and at the right side of the tongue. The research can provide a basis for the optimization design of slurry pump in deep ocean mining system.
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