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User centric dynamic web information visualization

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Science China(Information Sciences) 2013年第5期56卷 36-49页

作者： SALEHEEN Shibli lai wei Faculty of Information and Communication Technologies Swinburne University of TechnologyHawthorn 3122VictoriaAustralia

Visualization of information after retrieval from the World Wide Web is a very challenging task because of the huge amount of data in *** on rules,information is retrieved through mining techniques and then visualized in different *** web-graph is one way for users to visualize web data and its *** because of its huge size,the web-graph lacks simplicity for end *** clustering plays a very important role in reducing the complexity of the web graph by making it compact and simple,existing clustering techniques are insufficient to provide personalized visualization for ***,these clustering techniques end up showing the same clustered graph to every user,despite their varying *** work aims to make information visualization personalized based on user interests;to provide a good first impression of web information to end users;to make web navigation easier;and to create scope for further ***,we develop a system for clustering which first considers user interests and then visualizes the clustered web graph to make the information more useful to the end *** this paper,we present some experimental examples that show the improvements achieved by our approach over existing ones.

关键词： information retrieval user profile clustering personalization visualization

Direct-acting Antiviral Regimens for Patients with Chronic Infection of Hepatitis C Virus Genotype 3 in China

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Journal of Clinical and Translational Hepatology 2021年第3期9卷 419-427页

作者： Xiaozhong Wang lai wei Department of Hepatology Affiliated Hospital of Traditional Chinese Medicine of Xinjiang Medical UniversityUrumqiXinjiangChina Hepatopancreatobiliary Center Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijingChina

Hepatitis C virus(HCV)genotype(GT)3 infection is associated with a more rapid hepatic disease progression than the other ***,early HCV clearance slows down the disease progression and is important for improving prognosis in GT3-infected ***,compared with other genotypes,GT3 is difficult-to-treat with direct-acting antivirals,especially in the presence of *** guidelines recommend several regimens which have been proven to be effective in GT3-infected patients from the Western world(North America,Europe,and Oceania).In China,GT3 infection comprises 8.7–11.7%of the 10 million patients infected with HCV and has strikingly different characteristics from that in Western *** the Western countries,where GT3a is the predominant subtype,GT3a and 3b each affect roughly half of Chinese GT3-infected patients,with 94–96%of the GT3b-infected patients carrying A30K+L31M double NS5A resistance-associated *** 3 clinical trials including GT3b-infected patients have suggested that GT3b infection is difficult to cure,making the regimen choice for GT3b-infected patients an urgent clinical gap to be *** review includes discussions on the epidemiology of HCV GT3 in China,recommendations from guidelines,and clinical data from both Western countries and *** aim is to provide knowledge that will elucidate the challenges in treating Chinese GT3-infected patients and propose potential solutions and future research directions.

关键词： Cirrhosis Direct-acting antivirals Hepatitis C Genotype 3 Resistance-associated substitutions

A point-wise minimization model for data envelopment analysis considering environmental variables

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Journal of Management Analytics 2023年第2期10卷 336-358页

作者： Shijin Cai wei Jiang lai wei Antai College of Economics and Management Shanghai Jiao Tong UniversityShanghaiPeople’s Republic of China

Environmental variables are widely recognized as a cause of differences in efficiency ***,the existing literature on data envelopment analysis(DEA)in environmental factors ignores the impact of demand on *** address this gap,we propose the Point-wise Minimization DEA model(PWMDEA),which considers contextual variables that affect demand and lead to differences in *** model obtains efficiency value by considering the minimum of virtual inputs and virtual ***,efficiency is evaluated by minimizing the ratio of above minimum to virtual *** one-step model avoids issues of multi-stage assumptions and requires less data,making it more ***,we demonstrate the accuracy of our new model by conducting simulations with given true efficiency *** simulation results demonstrate that our model has the lowest ranking error when the output is affected by multiple inputs or when demand has a significant *** addition,we evaluate the efficiency of healthcare in 31 Chinese provinces by considering two environmental *** results suggest that provinces with lower financial investments or population loss received higher rankings from our proposed *** findings provide plausible explanations and demonstrate the practical usefulness of our model.

关键词： data envelopment analysis efficiency measurement environmental factors healthcare demand analysis

A review of medical ocular image segmentation

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虚拟现实与智能硬件（中英文） 2024年第3期6卷 181-202页

作者： lai wei Menghan HU Shanghai Key Laboratory of Multidimensional Information Processing East China Normal UniversityShanghai 200241China

Deep learning has been extensively applied to medical image segmentation,resulting in significant advancements in the field of deep neural networks for medical image segmentation since the notable success of U Net in ***,the application of deep learning models to ocular medical image segmentation poses unique challenges,especially compared to other body parts,due to the complexity,small size,and blurriness of such images,coupled with the scarcity of *** article aims to provide a comprehensive review of medical image segmentation from two perspectives:the development of deep network structures and the application of segmentation in ocular ***,the article introduces an overview of medical imaging,data processing,and performance evaluation ***,it analyzes recent developments in U-Net-based network ***,for the segmentation of ocular medical images,the application of deep learning is reviewed and categorized by the type of ocular tissue.

关键词： Medical image segmentation Orbit Tumor U-Net Transformer

The Superiorities of Bayes Linear Unbiased Estimator in Multivariate Linear Models

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Acta Mathematicae Applicatae Sinica 2012年第2期28卷 383-394页

作者： wei-ping ZHANG lai-sheng wei Yu CHEN Department of Statistics and Finance University of Science and Technology of China Hefei 230026 China

In this article, the Bayes linear unbiased estimator （BALUE） of parameters is derived for the multivariate linear models. The superiorities of the BALUE over the least square estimator （LSE） is studied in terms of... 详细信息

关键词： multivariate linear models Bayes linear unbiased estimator least square estimator mean squareerror matrix criterion Bayesian Pitman closeness criterion

Laboratory Experiment on Wave Induced Turbulence

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Journal of Ocean University of China 2018年第4期17卷 721-726页

作者： wei lai GUAN Changlong TROITSKAYA Yuliya Physical Oceanography Laboratory Ocean University of China Institute of Applied Physics Russian Academy of Science

A laboratory experiment was conducted inside a wind wave tank to investigate the wave induced turbulence. In this experiment, the wave surface elevation and velocity beneath the water surface were measured simultaneously to investigate the relation between the wave status and wave induced turbulence. The profile of the turbulent dissipation rate and Reynolds stress were calculated using experimental data. The effect of the wave status on turbulence is investigated with regard to the wind wave, swell, and mixed wave conditions. It was depicted that the turbulence decreased with increasing depth from the water surface and that the turbulence that was induced by a wave with larger wavelength and wave height is much stronger for the same wave status. Finally, we observed that the wind wave is more effective in activating the wave induced turbulence.

关键词： wave induced turbulence turbulent dissipation rate wave-turbulence decomposition

Analytic Solutions for the Spectral Responses of RCA-Grating-Based Waveguide Devices

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Chinese Physics Letters 2012年第12期29卷 102-104页

作者： ZENG Xiang-Kai wei lai School of Optoelectronic Information Chongqing University of TechnologyChongqing 4000542Department of Electronic and Information EngineeringHong Kong Polytechnic UniversityHong Kong

Analytic solutions(ASs)for the spectral responses of waveguide devices with raised-cosine-apodized(RCA)gratings are *** waveguide devices include short-and long-period RCA-gratings,RCA-grating-based interferometers as Fabry-Perot,Mach-Zehnder and Michelson *** calculations based on the analytic solutions are demonstrated and compared with those based on the transfer matrix(TM)method preferred,which has confirmed that the AS-based analysis is with enough accuracy and several thousands times the efficiency of the TM method.

关键词： interferometer waveguide Waveguide

High Temperature Seedless Synthesis of Au NRs Using BDAC/CTAB Co-surfactant

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Chinese Journal of Chemical Physics 2008年第5期21卷 476-480页

作者： Min Li lai wei Xian Zhang Xue-feng Yu Department of Physics Key Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education Wuhan University Wuhan 430072 China

Au nanorods have been successfully synthesized at 90 ℃ by using hexadecyltrimethylammonium bromide （CTAB） and benzyldimethylammoniumchloride hydrate （BDAC） co-surfactant. At 90 ℃, the reaction time was less than 10 s, and the longitudinal surface plasmon absorption band could vary between 680 and 770 nm by adjusting the molar ratio of BDAC to CTAB from 2 to 0.5. At 90 ℃, nanorods with a longitudinal surface plasmon absorption peak of 770 nm can be obtained when the molar ratio of BDAC to CTAB was 3：2.

关键词： Au nanorod Hexdecyltrimethylammonium bromide Benzyldimethylammoniumchloride hydrate High temperature

One-sided empirical Bayes test for location parameter in Gamma distribution

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Applied Mathematics(A Journal of Chinese Universities) 2018年第3期33卷 287-297页

作者： YUAN Min ZHANG Qian wei lai-sheng School of Public Health Administration Anhui Medical University Department of Statistics and Finance University of Science and Technology of China

In this paper, we devote to constructing the one-sided empirical Bayes(EB) test for the location parameter in the Gamma distribution by nonparametric method. Under some mild conditions, we prove that the EB test is asymptotically optimal with the rate of the order O(n^(-δs/(2s+1))), where 1/2 ≤ δ 1 is a given natural number. An example is also given to illustrate that the conditions of the main theorems are easily satisfied.

关键词： three parameter Gamma distribution location parameter one-sided empirical Bayes test asymptotically optimality convergence rate