Y.H. Chen

Institute of Statistical Science, Academia Sinica

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Zengfu Wang

Chinese Academy of Sciences

Jan Ma

Nanyang Technological University

X.L. Ye

Chinese Academy of Sciences

Bo Xu

People's Liberation Army 401 Hospital

Peng Jin

Harbin Institute of Technology

Bo Xu

Chinese Academy of Sciences

Yongli Wang

Institute of Semiconductors

Cong Cui

Chinese Academy of Sciences

Tao Li

Hubei University

Nik Petrinić

University of Oxford

Cooperative Institutions

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Institute of Semiconductors

Xi'an Jiaotong University

National Cheng Kung University

Institute of Modern Physics

Jilin University

University of Science and Technology of China

National Taiwan University

University of Oxford

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Study of repeated e-government project audit based on text mining

International Journal of Information Technology and Management (2017)

Zhi Nan Yu Hui Hui Li Y.H. Chen

In recent years, a large amount of unstructured text data is produced in the auditing field. In order to obtain the abundant potential knowledge and auditing trails, researchers pay more attention to the text mining technology. In this paper, we first introduce the basic concepts and application of text mining. Then, we use TF-IDF method to model text documents as term frequency vectors, and compute similarity between text documents by using cosine similarity. The results of experiment in the repeated e-government project audit show the analysis method of text achieved a relatively good accuracy.

Cosine similarity

Similarity (geometry)

Vector space model

10.1504/ijitm.2017.10005719

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Thermal Analysis of the Battery Box in Electric Vehicles

Advanced materials research (2013)

Wei Fan Wei Jing Wu Y.H. Chen Shuai Shen Ce Yuan Li

Based on the analysis of heat mechanism of the lithium-ion battery, the thermal properties on specific heat capacity and thermal conductivity were obtained by experiment , and then established thermal model of the monomer battery. Moreover, to verify the correctness of the model and get temperature field distribution, the heat simulation of it by using ANSYS Fluent software was conducted, After that, the monomer battery was grouped into five, then the simulation analysis of the grouped battery was done on the case of natural convection and forced convection. Finally, we verified the validity of the simulation by experiment.

10.4028/www.scientific.net/amr.724-725.1444

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A comprehensive experimental investigation of the rate-dependent interlaminar delamination behaviour of CFRP composites

Composites Part B Engineering (2023)

Y.H. Chen Kai Liu Ziwen Xu Huifang Liu Maria Lißner

The paper presents a systematic experimental study of the interlaminar delamination behaviour of a carbon composite subjected to Mode I, Mode II and Mixed-mode delamination at both quasi-static (QS) and high-rate (HR) conditions, which were conducted on a screw-driven test machine and in-house Hopkinson bar systems, respectively. A methodology integrating digital image correlation and the compliance-based beam theory was employed to circumvent the challenges in measuring the loads at HR tests and maintain good consistency during the data analysis of all delamination tests. The results demonstrated a positive rate-dependent delamination behaviour, with the HR Mode I, Mode II and Mixed-mode fracture toughness properties being 1.56, 1.66 and 1.60 times their QS counterparts, respectively. The cause of such a dependency was revealed following a detailed fractographic analysis, which highlighted that the observed dependency was associated with the transition of the predominant failure mechanisms in the QS and HR conditions.

Delamination

Digital image correlation

Fiber pull-out

Mixed mode

10.1016/j.compositesb.2023.110788

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Multiscale modelling of scaling effects in the impact response of plain woven composites

Composites Part B Engineering (2020)

Ziwen Xu Y.H. Chen W.J. Cantwell Zhongwei Guan

This paper presents a multiscale model developed to predict scaling effects in plain woven carbon fibre-reinforced polymer (CFRP) composites. The model contains a parameter-segmented unit cell (UC) developed to account for the contribution of the fabric architecture to the macroscopic response. The behaviour of constituent materials was considered by employing the models that have been established for characterising the nonlinearity and rate-dependence of the polymer matrix and the damage of the yarn material. A user subroutine was developed to numerically implement the parameterised UC and the material models for multiscale analyses. Based on the multiscale model, numerical examples were performed to investigate scaling effects in the impact response of a plain woven composite by simulating scaled panels subjected to projectile impact. It is shown that the proposed model is capable of predicting both scalable and non-scalable effects in this composite with reasonable success. The simulation results highlighted an evident variation of the load-displacement curves with scale size at the post-elastic stage, insensitivities of the primary failure modes and their appearance to scale size, as well as a clear trend of increased capability of energy absorption with scale size, which all agree well with those observed in experiments. The significance of this research is the development of a numerical tool capable of capturing the influence of microscopic features on macroscopic scaling effects in plain woven composites.

Woven fabric

Plain weave

10.1016/j.compositesb.2020.107885

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Citations (25)

Wind Energy Utilization of High-Rise Buildings Roof Numerical Analysis

Applied Mechanics and Materials (2011)

Y.H. Chen Xing Qian Peng Yang Rong

In order to improve the utilization of wind energy, set the tower on the roof, the roof tower on the use of CFD technology in different dimensions and different wind direction of the wind environment under the numerical analysis, simulation the velocity field around tower building, and comparative analysis, find out the reasonable fan placed to achieve the purpose of full use of wind energy.

10.4028/www.scientific.net/amm.137.87

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Study on thermal properties of nanocrystalline strontianite

Journal of Non-Crystalline Solids (2010)

Y.H. Chen Yi-Chi Huang Wei‐Teh Jiang

Nanocrystalline material

Differential thermal analysis

Thermogravimetry

Nanomaterials

10.1016/j.jnoncrysol.2010.04.026

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A Study on a Submerged Membrane Bioreactor for Municipal Wastewater Treatment

Advanced materials research (2012)

Xu Dong Liu Ying Meng Xiu Y.H. Chen

Through a long-term experiment, the performance of membrane bioreactor(MBR) for contaminants removal and membrane fouling was investigated. The results demonstrated that the removal effect of COD and NH3-N by the MBR was better. The effluent COD and NH3-N were lower than 50mg/L and 4mg/L, respectively. The observation by using the scanning electronic microscope(SEM) presented at the beginning of membrane filtration, there was no fouling in the membrane pores. With the continuous operation of the MBR, foulants shaped like mud cakes appeared in the membrane poles. The increasing of MLSS(mixed liquor suspended solids) concentration in the bioreactor didn’t increase membrane fouling. During the 75 days of operation, MBR cleaning was carried out twice.

Membrane bioreactor

Membrane Fouling

Filtration (mathematics)

10.4028/www.scientific.net/amr.531.415

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26.2-W mid-infrared supercontinuum generation in InF3 fiber

Y.H. Chen Linyong Yang Yukun Yang Bin Zhang Xiran Zhu

Mid-infrared supercontinuum has been widely used in biomedicine, spectroscopy and other fields. With the development of fluoride fiber, the output power of mid-infrared supercontinuum has gradually increased. In this paper, the supercontinuum generation system of InF3 fiber pumped by a supercontinuum laser with a spectral range of 1.9-2.6 μm is presented. By optimizing the cooling device, the supercontinuum laser with an output power of 26.2 W and an output spectral range of 1.95-4.5 μm is realized. To our knowledge, this is the first report of mid-infrared supercontinuum output with an average power exceeding 20 W in InF₃ fiber.

Supercontinuum

10.1117/12.3015031

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Molecular-beam epitaxial growth of position controlled InAs islands on clean edge of InGaAs/GaAs superlattice

Cong Cui Y.H. Chen C.L. Zhang Peng Jin Binyan Xu

A promising approach for positioning of InAs islands on [110]GaAs is demonstrated. By combining self-assembly of quantum dots with solid source molecular beam epitaxy (MBE) on cleaved edge of InGaAs/GaAs superlattice (SL), linear alignment of InAs islands on the InGaAs strain layers have been fabricated. The cleaved edge of InGaAs/GaAs SL acts as strain nanopattern for InAs selective growth. Indium atoms incident on the surface will preferentially migrate to InGaAs regions where favorable bonding sites are available. The strain nanopattern's effect is studied by the different indium fraction and thickness of In/sub x/Ga/sub 1-x/As/GaAs SL. The ordering of the InAs islands is found to depend on the properties of the underlying InGaAs strain layers.

Indium arsenide

Indium gallium arsenide

Strain (injury)

10.1109/sim.2005.1511401

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Aplicación de la fusión de datos entre encuestas sucesivas:el caso de la Encuesta de Seguridad Pública de Cataluña

XXXI Congreso Nacional de Estadística e Investigación Operativa ; V Jornadas de Estadística Pública: Murcia, 10-13 de febrero de 2009 : Libro de Actas, 2009, ISBN 978-84-691-8159-1 (2009)

Tomàs Aluja Banet Nuria Brunsó Ripoll Y.H. Chen Josep Daunis i Estadella Enric Ripoll Font

El Plan Estadstico de Catalu~na 2006-2009 incluye la actividad Aplicaciones de metodos de fusion o integracion de datos. Pretende profundizar en las tecnicas de fusion de datos (statistical matching) en la estadstica ocial. Su objetivo es integrar la informacion de fuentes de datos independientes de poblaciones semejantes y pretende minimizar la carga que soportan los informantes. Se consigue imputando en bloque la informacion de unos individuos a otros distintos, que tienen caractersticas en comun. El estudio se centra en las encuestas de victimizacion y seguridad que realizan el Idescat y el Departamento de Interior desde el a~no 2000, esta encuesta anual se dirige a los residentes en Catalu~na de 16 y mas a~nos. El objetivo es fusionar datos para estimar variables de opinion de la encuesta del 2007 a partir de la informacion comun y especca del 2006. Se comparan los resultados con los reales del 2007 para obtener informacion estadstica sucientemente able y atenuar el coste.

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