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Finite element verification on constitutive law of AZ31 magnesium alloy at 400℃

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Transactions of Nonferrous Metals Society of China 2013年第11期23卷 3372-3382页

作者：曾世聪胡宣德成功大学土木工程学系

A constitutive law is offered for an AZ31B-H24 Mg alloy within a strain rate range of 10-5-10-2 s-1 at a temperature of 400 ℃ The constitutive law, which is developed by curve fitting the tensile tests data, is expressed as a flow stress function of strain and strain rate. Furthermore, the constitutive law is embedded into a proper FE model to simulate the tensile experiments for the purpose of verifying reliability, where the incremental stress-strain relationships are calculated by an elastic-plastic theory in the finite element analysis （FEA）. The results show that the stress-strain characteristics and the final deformed shapes in the FEA agree well with the experiments. In addition, the predicting analysis of constant-velocity stretch conditions and the verification of a free bulge forming experiment show that the proposed FE model is practicable for mechanical analysis on superplastic forming problems. A selective numerical method is offered for advanced superplastic analysis on AZ31 Mg alloys.

关键词： AZ31 magnesium alloy constitutive law finite element verification

Advancements in Liver Tumor Detection:A Comprehensive Review of Various Deep Learning Models

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 91-122页

作者： Shanmugasundaram Hariharan D.Anandan Murugaperumal Krishnamoorthy Vinay Kukreja Nitin Goyal shih-Yu Chen Deptartment of Artificial Intelligence and Data Science Vardhaman College of EngineeringHyderabad501218India Deptartment of CSE V.S.B College of EngineeringKarur639111India Deptartment of Electrical and Electronics Engineering Vardhaman College of EngineeringHyderabad501218India Centre for Research Impact&Outcome Chitkara UniversityRajpura140401PunjabIndia Department of Computer Science and Engineering School of Engineering and TechnologyCentral University of HaryanaMahendergarh123031HaryanaIndia Department of Computer Science and Information Engineering National Yunlin University of Science and TechnologyYunlin64002Taiwan Intelligence Recognition Industry Service Research Center National Yunlin University of Science and TechnologyYunlin64002Taiwan

Liver cancer remains a leading cause of mortality worldwide,and precise diagnostic tools are essential for effective treatment *** Tumors(LTs)vary significantly in size,shape,and location,and can present with tissues of similar intensities,making automatically segmenting and classifying LTs from abdominal tomography images crucial and *** review examines recent advancements in Liver Segmentation(LS)and Tumor Segmentation(TS)algorithms,highlighting their strengths and limitations regarding precision,automation,and *** metrics are utilized to assess key detection algorithms and analytical methods,emphasizing their effectiveness and relevance in clinical *** review also addresses ongoing challenges in liver tumor segmentation and identification,such as managing high variability in patient data and ensuring robustness across different imaging *** suggests directions for future research,with insights into technological advancements that can enhance surgical planning and diagnostic accuracy by comparing popular *** paper contributes to a comprehensive understanding of current liver tumor detection techniques,provides a roadmap for future innovations,and improves diagnostic and therapeutic outcomes for liver cancer by integrating recent progress with remaining challenges.

关键词： Liver tumor detection liver tumor segmentation image processing liver tumor diagnosis feature extraction tumor classification deep learning machine learning

NUMERICAL SIMULATION OF SOLITARY WAVE RUN-UP AND OVER-TOPPING USING BOUSSINESQ-TYPE MODEL

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Journal of Hydrodynamics 2012年第6期24卷 899-913页

作者： tsung Wen-Shuo HSIAO shih-Chun LIN Ting-Chieh Department of Hydraulic and Ocean Engineering National Cheng Kung University Tainan Hydraulics Laboratory National Cheng Kung University

In this article, the use of a high-order Boussinesq-type model and sets of laboratory experiments in a large scale flume of breaking solitary waves climbing up slopes with two inclinations are presented to study the shoreline behavior of breaking and non-breaking solitary waves on plane slopes. The scale effect on run-up height is briefly discussed. The model simulation capability is well validated against the available laboratory data and present experiments. Then, serial numerical tests are conducted to study the shoreline motion correlated with the effects of beach slope and wave nonlinearity for breaking and non-breaking waves. The empirical formula proposed by Hsiao et al. for predicting the maximum run-up height of a breaking solitary wave on plane slopes with a wide range of slope inclinations is confirmed to be cautious. Furthermore, solitary waves impacting and overtopping an impermeable sloping seawall at various water depths are investigated. Laboratory data of run-up height, shoreline motion, free surface elevation and overtopping discharge are presented. Comparisons of run-up, run-down, shoreline trajectory and wave overtopping discharge are made. A fairly good agreement is seen between numerical results and experimental data. It elucidates that the present depth-integrated model can be used as an efficient tool for predicting a wide spectrum of coastal problems.

关键词： Boussinesq equations solitary wave run-up shoreline scale effect overtopping

Adult sigmoid intussusception resembling rectal prolapse:A case report

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World Journal of Clinical Cases 2024年第6期12卷 1163-1168页

作者： tsung-Jung Tsai Yu shih Liu Department of Surgery Changhua Christian HospitalChanghua 500209Taiwan Department of Colorectal Surgery Changhua Christian HospitalChanghua 500209Taiwan

BACKGROUND Rectal prolapse arises from benign *** symptoms of internal intussusception mirror those of rectal prolapse,a misdiagnosis is possible,especially under limited clinical *** is crucial to recognize and differentiate rectal prolapse from internal intussusception because the two diagnoses have different ***,we describe a case of adult sigmoid intussusception presenting as rectal *** SUMMARY A 64-year-old woman with no known medical history visited a gastrointestinal outpatient department due to hard bloody stool defecation for 1 wk followed by constipation for 3 *** revealed a huge polypoid ulcerated tumor at the sigmoid colon with lumen *** patient was admitted due to postprocedural dull abdominal *** to failed colonoscopy reduction and stent insertion,the patient underwent sigmoid colon resection with primary end-to-end anastomosis,with the transverse colostomy pathological report showing adenocarcinoma,*** recovered well from the operation and was discharged with regular outpatient clinic *** Presentation and manifestation of sigmoid intussusception may resemble that of rectal prolapse,necessitating careful observation due to distinct prognostic implications.

关键词： Sigmoid intussusception Rectal prolapse Endoscopic reduction Adenocarcinoma Case report

Visualizing Meiotic Chromosome Pairing and Segregation in Interspecific Hybrids of Rice by Genomic in situ Hybridization

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Rice science 2021年第1期28卷 69-80页

作者： Liu Mao-Sen tseng shih-Hsuan Chen Ting-Chu Chung Mei-Chu Institute of Plant and Microbial Biology Academia SinicaNankangTaipei 11529TaiwanChina

Meiotic disturbances in F1 hybrids and their progenies are still major problems in wide *** investigate the genome affinity reflected in chromosome pairing and segregation,we studied chromosome behaviors during meiosis in two interspecific F1 hybrids[***×***(Om×Oa,BCE genome)and Oa×***(Or,EHJ genome)]by using both traditional staining methods and genomic in situ hybridization(GISH).GISH analysis has been successfully performed on mitotic chromosomes to distinguish different Oryza genomes,but relatively fewer systematic analyses of meiotic chromosomes of interspecific hybrids have been *** the hybrids,highly irregular chromosome behaviors through meiosis resulted in producing microspores with unbalanced *** diakinesis of these two hybrids,most chromosomes present as univalent,with low frequency as bivalents and occasionally as *** a pollen mother cell,2 to 8 bivalents and 0 to 4 trivalents were observed in the hybrid Oa×Or,and 1 to 8 bivalents and 0 to 5 trivalents were observed in the hybrid Om×*** results indicated that 51.52%bivalents in Oa×Or and 79.65%bivalents in Om×Oa involved allosyndetic association,which indicates that recombination and introgression should be possible if viable backcrosses can be recovered even from triploid *** this study,we revealed that the meiotic disturbance due to low affinities between parental genomes is the major reason for the sterility of these two triploid interspecific *** two hybrids showing vigor in reproductive growth are potential genetic resources in future breeding programs.A better understanding of genomic affinities between these distant Oryza species can facilitate planning an effective breeding program by using wide hybridization,and efficient and routine GISH analysis is helpful to monitor alien introgression in the process.

关键词： Oryza wide hybridization genomic affinity allosyndesis autosyndesis pollen viability

Helicobacter pylori infection concomitant with metabolic syndrome further increase risk of colorectal adenomas

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World Journal of Gastroenterology 2010年第30期16卷 3841-3846页

作者： Ying-Lung Lin Jui-Kun Chiang shih-Min Lin Chih-En tseng Department of Family Medicine Buddhist Tzu-Chi Dalin General Hospital Department of Biological Sciences University of Waikato Department of Anatomic Pathology Buddhist Dalin Tzu Chi General Hospital School of Medicine Buddhist Tzu Chi University

AIM: To investigate the association of colorectal adenomas with both Helicobacter pylori (H. pylori) infection and metabolic syndrome. METHODS: Using a cross-sectional hospital-based study, we analyzed physical examination data from 9311 healthy subjects with overnight physical examinations performed between January 2004 and December 2006. Examined data included gender, age, life style, anthropometric measurements, blood pressure, biochemical and hematological studies, H. pylori infection detected by esophagogastroduodenoscopy and biopsy urease tests, and colorectal adenomas detected with a complete total colonoscopy. RESULTS: The prevalence values for H. pylori infection, metabolic syndrome, and colorectal adenoma were39.2%, 18.7%, and 20.7%, respectively. Colorectal adenoma risk factors included male gender [odd ratio (OR): 2.005, 95% conf idence interval (CI): 1.740-2.310, P < 0.001], advanced age (OR: 1.046, 95% CI: 1.040-1.052, P < 0.001), smoking (OR: 1.377, 95% CI: 1.146-1.654, P = 0.001), increased body fat (OR: 1.016, 95% CI: 1.007-1.026, P = 0.001), higher white blood cell count (OR: 1.038, 95% CI: 1.005-1.073, P = 0.025), H. pylori infection (OR: 1.366, 95% CI: 1.230-1.517, P < 0.001), and metabolic syndrome (OR: 1.408, 95% CI: 1.231-1.610, P < 0.001). In addition, concomitant H. pylori infection with metabolic syndrome further increased the probability of colorectal adenomas. CONCLUSION: Our study revealed H. pylori infection with concomitant metabolic syndrome might further increase the risk of colorectal adenomas.

关键词： Biopsy urease test Colorectal adenoma Colorectal cancer Helicobacter pylori Metabolic syndrome

Solitary concomitant endocrine tumor and ductal adenocarcinoma of pancreas

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World Journal of Gastroenterology 2010年第21期16卷 2692-2697页

作者： shih-Tang Yan Chang-Kuo Wei Chih-Wen Lin Chih-En tseng Department of Endocrinology and Metabolism Buddhist Dalin Tzu Chi General HospitalChiayi 622TaiwanChina Department of General Surgery Buddhist Dalin Tzu Chi General HospitalChiayi 622TaiwanChina Department of Medical Imaging Buddhist Dalin Tzu Chi General HospitalChiayi 622TaiwanChina Department of Anatomic Pathology Buddhist Dalin Tzu Chi General HospitalChiayi 622TaiwanChina School of Medicine Tzu Chi UniversityHualien 97004TaiwanChina

Pancreatic tumors with combined exocrine and endocrine features are *** reported cases are classified as mixed exocrine and endocrine carcinoma of the *** report the first case of solitary concomitant endocrine tumor and ductal adenocarcinoma of the pancreas.A 58-year-old patient was admitted for uncontrolled diabetes mellitus and body weight *** tumor was fortuitously discovered in the pancreatic tail after a tumor survey ***,the solitary tumor had a central fibrous band that clearly divided it into two *** microscopic examination,the tumor contained both endocrine and exocrine components distinctly separated by the central fibrous *** exocrine part showed a poorly-differentiated *** endocrine part was strongly immunoreactive to chromogranin,synaptophysin and *** reviewed the literature on pancreatic tumors with combined exocrine and endocrine features.A simple classification for this group of neoplasms is suggested,including five types:amphicrine,mixed,collision,solitary concomitant and multiple concomitant.

关键词： Pancreas Concomitant tumor Collision tumor Mixed tumor Glucagonoma

Synchronous but separate neuroendocrine tumor and high-grade dysplasia/adenoma of the gall bladder:A case report

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World Journal of Clinical Cases 2022年第7期10卷 2322-2329页

作者： tsung-Hsien Hsiao Chao-Chuan Wu Hui-Hwa tseng Jiann-Hwa Chen Division of Gastroenterology and Hepatology Taipei Tzu Chi HospitalNew Taipei City 231Taiwan Department of Surgery Taipei Tzu Chi HospitalNew Taipei City 231Taiwan Department of Pathology Taipei Tzu Chi HospitalNew Taipei City 231Taiwan Division of Gastroenterology and Hepatology Department of Internal MedicineTaipei Tzu Chi HospitalBuddhist Tzu Chi Medical FoundationNew Taipei City 231Taiwan

BACKGROUND Gall bladder neuroendocrine tumors(GB-NETs)are rare,accounting for less than 0.5%of all *** usually lack specific symptoms and are difficult to diagnose *** most cases,GB-NETs are incidentally found after cholecystectomy for large polyps or cholelithiasis,causing acute or chronic *** coexistence of GB-NET and GB adenocarcinoma is very *** SUMMARY We report a case of synchronous but separate GB-NET and adenoma with high-grade dysplasia in a patient who had undergone surgery for a progressively growing GB polypoid *** the best of our knowledge,simultaneous separation of NETs and cancer in the GB has not been *** Coexistent GB carcinoid tumor and adenocarcinoma is rare.A surveillance program is needed for these large GB polyps.

关键词： Synchronous Neuroendocrine tumor Adenoma with high-grade dysplasia Gall bladder Case report

Gallbladder polyp as a manifestation of hemobilia caused by arterial-portal fistula after percutaneous liver biopsy: A case report

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World Journal of Gastroenterology 2005年第2期11卷 305-307页

作者： Chih-Lang Lin tsung-shih Lee Kar-Wai Lui Cho-Li Yen Division of Gastroenterology Department of Internal MedicineChang-Gung Memorial Hospital and UniversityKeelungTaiwanChina

Outpatient percutaneous liver biopsy is a common practice in the differential diagnosis and treatment of chronic liver disease. The major complication and mortality rate were about 2-4% and 0.01-0.33% respectively. Arterio-portal fistula as a complication of percutaneous liver biopsy was infrequently seen and normally asymptomatic. Hemobilia, which accounted for about 3% of overall major percutaneous liver biopsy complications, resulted rarely from arterio-portal fistula We report a hemobilia case of 68 years old woman who was admitted for abdominal pain after liver biopsy. The initial ultrasonography revealed a gallbladder polypoid tumor and common bile duct (CBD) dilatation. Blood clot was extracted as endoscopic retrograde cholangiopancreatography (ERCP) showed hemobilia. The patient was shortly readmitted because of recurrence of symptoms. A celiac angiography showed an intrahepatic arterio-portal fistula. After superselective embolization of the feeding artery, the patient was discharged uneventfully. Most cases of hemobilia caused by percutaneous liver biopsy resolved spontaneously. Selective angiography embolization or surgical intervention is reserved for patients who failed to respond to conservative treatment.

关键词： Gallbladder polyp Hemobilia Arterial-portal fistula Percutaneous liver biopsy