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VISCOPLASTIC COLLAPSE OF SHARP-NOTCHED CIRCULAR TUBES UNDER CYCLIC BENDING

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Acta Mechanica Solida Sinica 2013年第6期26卷 629-641页

作者： Kuo-Long lee chien-Min Hsu Wen-Fung Pan Department of Computer Application Engineering Far East University Department of Interior Design Tung Fang Design University Department of Engineering Science National Cheng Kung University

This study discusses the experimental result of the viscoplastic response and col- lapse of sharp-notched 316L stainless steel tubes with different notched depths subjected to cyclic bending. The tube bending machine and curvature-ovalization measurement apparatus were used for conducting the symmetric curvature-controlled cyclic bending. To highlight the viscoplastic behavior, three different curvature-rates, 0.0035, 0.035 and 0.35 m-1s-1, were controlled. Ob- servations of a certain curvature-rate reveal that five almost parallel lines corresponding to five different notch-depth （0.2, 0.4, 0.6, 0.8 and 1.0 mm） tubes were presented in the experimental relationship between the cyclic controlled curvature and the number of cycles needed to pro- duce buckling on a log-log scale. However, the slopes for the three different curvature-rates are different. An empirical formulation was proposed to simulate the aforementioned relationship. When comparing with the experimental findings, the simulation was in good agreement with the experimental data.

关键词： viscoplastic collapse sharp-notched circular tube cyclic bending curvature-rate ovalization

An experimental study of in-plane arch-shaped dampers

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Earthquake Engineering and Engineering Vibration 2018年第4期17卷 849-867页

作者： chien-Liang lee Yen-Po Wang Meng-Yan Cai School of Civil Engineering and Architecture Xiamen University of Technology Xiamen 361024 Fujian China Department of Civil Engineering Chiao-Tung University Hsinchu 30010 Chinese Taipei

As an effort to minimize material utilization, seismic steel dampers designed to deform inelastically in an in-plane flexural mode have attracted serious attention recently. This paper presents a new type of metallic yielding damper referred to as the in-plane arch-shaped damper modified from its portal frame-shaped counterpart by replacing the straight beam with a circular arch to minimize the effects of stress concentration and warping, and therefore to avoid premature failure. Component tests of both the portal frame-shaped and arch-shaped in-plane dampers were conducted for comparison. Hysteresis loops obtained from the component tests under cyclic loads indicate substantial improvement on the energydissipative characteristics of the proposed damper. Moreover, seismic performance assessment of the proposed damper was carried out further via shaking table tests of a five-story model frame. Encouraging results have been achieved in terms of acceleration reduction, damping enhancement and peak suppression of the frequency response functions, suggesting the potential of the proposed device to be used in earthquake-resisting systems.

关键词： seismic metallic yielding damper in-plane arch-shaped damper hysteresis loop shaking table test

No Additional Cholesterol-Lowering Effect Observed in the Combined Treatment of Red Yeast Rice and Lactobacillus Casei in Hyperlipidemic Patients：A Double-Blind Randomized Controlled Clinical Trial

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Chinese Journal of Integrative Medicine 2017年第8期23卷 581-588页

作者： chien-Ying lee Min-chien Yu Wu-Tsun Perng Chun-Che Lin Ming-Yung lee Ya-Lan Chang Ya-Yun Lai Yi-Ching lee Yu-Hsiang Kuan James Cheng-Chung wei Hung-Che Shih Institute of Medicine Chung Shan Medical University Taichung Taiwan 40201 China Department of Pharmacy Chung Shah Medical University Hospital Taichung Taiwan 40201 China Department of Pharmacology Chung Shan Medical University Taichung Taiwan 40201 China Department of Integrated Chinese and Western Medicine Chung Shan Medical University Hospital Taichung Taiwan 40201 China Department of Recreation Sport & Health Promotion National Pingtung University of Science and Technology Taiwan 91201 China Division of Hepatogastroenterology Department of Internal Medicine Chung Shan Medical University Hospital Taichung Taiwan 40201 China Department of Statistics and Informatics Science Providence University Taiwan 43301 China Department of Applied Cosmetology National Tainan Junior College of Nursing China Taiwan 700 Department of Internal Medicine Chung Shan Medical University HospitalGraduate Institute of Integrated Medicine China Medical University Taichung Taiwan 40201 China

Objective：To observe the effect of combining red yeast rice and Lactobacillus casei（***）in lowering cholesterol in patients with primary hyperlipidemia,the later has also been shown to remove cholesterol in in vitro ***：A double-blind clinical trial was conducted to evaluate the cholesterol-lowering effect of the combination of red yeast rice and *** patients with primary hyperlipidemia were recruited and randomized equal y to either the treatment group（red yeast rice＋***）or the control group（red yeast rice＋placebo）.One red yeast rice capsule and two *** capsules were taken twice a *** treatment lasted for 8 weeks,with an extended follow-up period of 4 *** primary endpoint was a difference of serum low-density lipoprotein cholesterol（LDL-C）level at week ***：At week 8,the LDL-C serum level in both groups was lower than that at baseline,with a decrease of 33.85±26.66 mg/dL in the treatment group and 38.11±30.90 mg/dL in the control group;however,there was no statistical difference between the two groups（P〉0.05）.The total cholesterol was also lower than the baseline in both groups,yet without a statistical difference between the two *** only statistical y significant difference between the two groups was the average diastolic pressure at week 12,which dropped by 2.67 mm Hg in the treatment group and increased by 4.43 mm Hg in the placebo group（P〈0.05）.The antihypertensive activity may be associated with *** yeast rice can significantly reduce LDL-C,total cholesterol and ***：The combination of red yeast rice and *** did not have an additional effect on lipid profiles.

关键词： red yeast rice Lactobacillus casei,low-density lipoprotein cholesterol randomizedcontrolled trial

A Review of Predictive and Contrastive Self-supervised Learning for Medical Images

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Machine Intelligence Research 2023年第4期20卷 483-513页

作者： wei-chien Wang Euijoon Ahn Dagan Feng Jinman Kim Biomedical and Multimedia Information Technology(BMIT)Research Group School of Computer ScienceThe University of SydneySydneyNSW2006Australia College of Science and Engineering James Cook UniversityCairnsQLD4811Australia

Over the last decade, supervised deep learning on manually annotated big data has been progressing significantly on computer vision tasks. But, the application of deep learning in medical image analysis is limited by the scarcity of high-quality annotated medical imaging data. An emerging solution is self-supervised learning (SSL), among which contrastive SSL is the most successful approach to rivalling or outperforming supervised learning. This review investigates several state-of-the-art contrastive SSL algorithms originally on natural images as well as their adaptations for medical images, and concludes by discussing recent advances, current limitations, and future directions in applying contrastive SSL in the medical domain.

关键词： Self-supervised learning(SSL) contrastive learning deep learning medical image analysis computer vision

Real-Time Human Body Motion Capturing System

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Journal of Electronic Science and Technology 2017年第2期15卷 115-122页

作者： Chung-Lin Huang chien-wei Hsu Zhi-Ren Tsai Department of M-Commerce and Multimedia Applications Asia UniversityTaichung 41354 MediaTek Inc.Hsinchu department of computer science and information engineering Asia UniversityTaichung 41354

This paper proposes a human body motion capturing system using the depth images. It consists of three processes to estimate the human pose parameters. First, we develop a pixel-based body part classifier to segment the human silhouette into different body part sub-regions and extract the primary joints. Second, we convert the distribution of the joints to the feature vector and apply the regression forest to estimate human pose parameters. Third, we apply the temporal constraints mechanism to find the best human pose parameter with the minimum estimation error. In experiments, we show that our system can operate in real-time with sufficient accuracy.

关键词： Index Terms-Motion capturing random forest classifier regression forest.

Horizontal gas mixing in rectangular fluidized bed:A novel method for gas dispersion coefficients in various conditions and distributor designs

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Chinese Journal of Chemical Engineering 2017年第7期25卷 848-861页

作者： Asheesh Nautiyal chien-Song Chyang Pin-wei Li Hsin-Yung Hou Department of Chemical Engineering Chung Yuan Christian UniversityTaoyuan 320TaiwanChina

In a rectangular fluidized bed combustor, the tracer gas is injected continuously into the bed from a point source at the center of the distributor plate. In this study, a general governing equation is formulated for tracer gas dispersion in the bed. An analytical solution is derived to estimate the dispersion coefficients, Dxand Dy, in a horizontal plane. The concentration profiles at different sampling heights with various gas velocities are ***, to estimate the dispersion coefficients, surface fitting of the obtained analytical solution to the experimental data is performed. The dispersion coefficients obtained from this model are compared with those of a conventional model. Additionally, the effect of walls, bed height and gas injection rate on the dispersion coefficients in a horizontal plane is investigated, and the effect of distributor design on the dispersion coefficients in a horizontal plane is investigated with different tracer positions. It is found that Dxand Dyare nearly equivalent at a lower tracer gas ratio of the injected gas to the total gas flow rate. It is also demonstrated that the effect of bed height on Dxis minor. This model is also able to estimate the dispersion coefficients in the case of a multihorizontal nozzle distributor.

关键词： Gas dispersion coefficient Horizontal mixing Wall effect Surface modeling

Effect of Thermal Refining on Mechanical Properties of Annealed SAE 4130 by Multilayer GTAW

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Journal of Iron and Steel Research International 2012年第7期19卷 71-78页

作者： I K lee C L Chung Y T lee Y T chien Department of Materials Science and Engineering Da-Yeh University

During the first welding process in manufacturing a precise seam container, the steel material must first undergo a full annealing treatment. Multilayer welding operations are conducted and then applied with refining treatment to obtain the goal by hardening. The influence of thermal refining on mechanical properties of annealed SAE 4130 by multilayer GTAW （gas tungsten arc welding） was discussed. The AW （annealing＋welding） and AWST （annealing＋welding＋solution＋tempering） occurred with a minimum hardness value at GGHAZ （grain growth heat affected zone） due to coarse grain growth~ the hardness occurred with sudden drops between the multilayer welding, but was still larger than the minimum value at HAZ （heat affected zone）. The welded joint efficiency of the AWST was 89.9%, with the elongation reduced to 77.2% of AST （annealing＋solution＋tempering）. The cross section of the tensile samples both appeared with a uniform dimple-shaped structure, and however the necking for AST was greater than that for AWST. The impact value for AWST was 166.5% of AST. Moreover, from microstructure observations, it was found that AWST had a greater tendency to ductile failure than AST. These results can be inferred., the process of steady pressure and the initial position of the precision tube breakage HAZ. However, when stress occurs instantly, HAZ can absorb more energy, therefore the initial damage does not occur.

关键词： thermal refining SAE 4130 multilayer welding GTAW

Diagnosis and management of glandular papilloma of lung:A case report

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World Journal of Clinical Cases 2020年第6期8卷 1104-1115页

作者： chien-wei Wu Ann Chen Tsai-Wang Huang Department of Surgery Tri-Service General HospitalTaipei 114Taiwan Department of Pathology Tri-Service General HospitalTaipei 114Taiwan Division of Thoracic Surgery Department of SurgeryTri-Service General HospitalTaipei 114Taiwan

BACKGROUND Solitary respiratory papilloma is a rare epithelial tumor that can be categorizedinto multiple subtypes depending on tumor location,histological presentationand *** glandular type is the rarest,with only 30 cases available withinthe ***,information on its identification and treatment is *** thisreport,we discuss the diagnostic strategy and management of glandularpapilloma,along with a review of the *** SUMMARY We describe a male 44-year-old nonsmoker who presented with a persistentcough and recurrent pneumonia,which he had experienced for over 2 *** pulmonary nodule with an endobronchial lesion was found via computedtomography of the *** a biopsy was obtained,no definite diagnosiscould be *** papilloma of the lung was confirmed via videoassistedthoracoscopic anatomic resection of the right lower lobe of the *** remained disease-free after 6 mo follow *** Minimally invasive surgery is feasible for the surgical resection of endobronchialglandular *** rare,glandular papilloma should be consideredin patients with infection or endobronchial lesions.

关键词： Papilloma Lung Treatment Minimal invasive surgery Diagnosis Case report

Machine learning-based comparison of factors influencing estimated glomerular filtration rate in Chinese women with or without nonalcoholic fatty liver

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World Journal of Clinical Cases 2024年第15期12卷 2506-2521页

作者： I-chien Chen Lin-Ju Chou Shih-Chen Huang Ta-wei Chu Shang-Sen lee Department of Nursing Kaohsiung Armed Forces General HospitalKaohsiung 802Taiwan Department of Obstetrics and Gynecology Tri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan Chief Executive Officer's Office MJ Health Research FoundationTaipei 114Taiwan Department of Urology Taichung Tzu Chi HospitalBuddhist Tzu Chi Medical FoundationTaichung 427Taiwan School of Medicine Tzu Chi UniversityHualian 970Taiwan Department of Urology Tri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan

BACKGROUND The prevalence of non-alcoholic fatty liver(NAFLD)has increased *** with NAFLD are known to have higher chance for renal function *** past studies used traditional multiple linear regression(MLR)to identify risk factors for decreased estimated glomerular filtration rate(eGFR).However,medical research is increasingly relying on emerging machine learning(Mach-L)*** present study enrolled healthy women to identify factors affecting eGFR in subjects with and without NAFLD(NAFLD+,NAFLD-)and to rank their *** To uses three different Mach-L methods to identify key impact factors for eGFR in healthy women with and without *** A total of 65535 healthy female study participants were enrolled from the Taiwan MJ cohort,accounting for 32 independent variables including demographic,biochemistry and lifestyle parameters(independent variables),while eGFR was used as the dependent *** from MLR,three Mach-L methods were applied,including stochastic gradient boosting,eXtreme gradient boosting and elastic *** of estimation were used to define method accuracy,where smaller degree of error indicated better model *** Income,albumin,eGFR,High density lipoprotein-Cholesterol,phosphorus,forced expiratory volume in one second(FEV1),and sleep time were all lower in the NAFLD+group,while other factors were all significantly higher except for smoking ***-L had lower estimation errors,thus outperforming *** Model 1,age,uric acid(UA),FEV1,plasma calcium level(Ca),plasma albumin level(Alb)and T-bilirubin were the most important factors in the NAFLD+group,as opposed to age,UA,FEV1,Alb,lactic dehydrogenase(LDH)and Ca for the *** the importance percentage was much higher than the 2nd important factor,we built Model 2 by removing *** The eGFR were lower in the NAFLD+group compared to the NAFLD-group,with age being was the most important impact factor in both groups of he

关键词： Non-alcoholic fatty liver Estimated glomerular filtration rate Machine learning Chinese women