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Estimation Performance for the Cubature Particle Filter under Nonlinear/Non-Gaussian Environments

Computers, Materials & Continua 2021年第5期67卷 1555-1575页

作者： Dah-Jing Jwo Chien-Hao tseng Department of Communications Navigation and Control EngineeringTaiwan Ocean UniversityKeelung202301TaiwanChina National Center for High-Performance Computing National Applied Research LaboratoriesHsinchu30076TaiwanChina

This paper evaluates the state estimation performance for processing nonlinear/non-Gaussian systems using the cubature particle lter(CPF),which is an estimation algorithm that combines the cubature Kalman lter(CKF)and the particle lter(PF).The CPF is essentially a realization of PF where the third-degree cubature rule based on numerical integration method is adopted to approximate the proposal *** is benecial where the CKF is used to generate the importance density function in the PF framework for effectively resolving the nonlinear/non-Gaussian *** on the spherical-radial transformation to generate an even number of equally weighted cubature points,the CKF uses cubature points with the same weights through the spherical-radial integration rule and employs an analytical probability density function(pdf)to capture the mean and covariance of the posterior distribution using the total probability theorem and subsequently uses the measurement to update with Bayes’*** is capable of acquiring a maximum a posteriori probability estimate of the nonlinear system,and thus the importance density function can be used to approximate the true posterior density *** Bayesian ltering,the nonlinear lter performs well when all conditional densities are assumed *** applied to the nonlinear/non-Gaussian distribution systems,the CPF algorithm can remarkably improve the estimation accuracy as compared to the other particle lterbased approaches,such as the extended particle lter(EPF),and unscented particle lter(UPF),and also the Kalman lter(KF)-type approaches,such as the extended Kalman lter(EKF),unscented Kalman lter(UKF)and *** illustrative examples are presented showing that the CPF achieves better performance as compared to the other approaches.

关键词： Nonlinear estimation non-Gaussian Kalman lter unscented Kalman lter cubature particle filter

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Risk of cholangiocarcinoma in patients undergoing therapeutic endoscopic retrograde cholangiopancre-atography or cholecystectomy: A population based study

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World Journal of Gastrointestinal Oncology 2019年第3期11卷 238-249页

作者： Chi-Chih Wang Ming-Chang Tsai Wen-Wei Sung Tzu-Wei Yang hsuan-Yi Chen Yao-Tung Wang Chang-Cheng Su Ming-Hseng tseng Chun-Che Lin Institute of Medicine Chung Shan Medical University School of Medicine Chung Shan Medical University Division of Gastroenterology and Hepatology Department of Internal Medicine Chung Shan Medical University Hospital Department of Urology Chung Shan Medical University Hospital Institute and Department of Biological Science and Technology National Chiao Tung University Division of Pulmonary Medicine Department of Internal Medicine Chung Shan Medical University Hospital Department of Medical Informatics Chung Shan Medical University Information Technology Office Chung Shan Medical University Hospital

BACKGROUND Cholangiocarcinoma is a highly lethal disease that had been underestimated in the past two decades. Many risk factors are well documented for in cholangiocarcinoma, but the impacts of advanced biliary interventions, like endoscopic sphincterotomy(ES), endoscopic papillary balloon dilatation(EPBD),and cholecystectomy, are inconsistent in the previous *** To clarify the risks of cholangiocarcinoma after ES/EPBD, cholecystectomy or no intervention for cholelithiasis using the National Health Insurance Research Database(NHIRD).METHODS From data of NHIRD 2004-2011 in Taiwan, we selected 7938 cholelithiasis cases as well as 23814 control group cases(matched by sex and age in a 1:3 ratio). We compared the previous risk factors of cholangiocarcinoma and cholangiocarcinoma rate in the cholelithiasis and control groups. The incidences of total and subsequent cholangiocarcinoma were calculated in ES/EPBD patients, cholecystectomy patients, cholelithiasis patients without intervention,and groups from the normal *** In total, 537 cases underwent ES/EPBD, 1743 cases underwent cholecystectomy,and 5658 cholelithiasis cases had no intervention. Eleven(2.05%), 37(0.65%), and7(0.40%) subsequent cholangiocarcinoma cases were diagnosed in the ES/EPBD,no intervention, and cholecystectomy groups, respectively, and the odds ratio for subsequent cholangiocarcinoma was 3.13 in the ES/EPBD group and 0.61 in the cholecystectomy group when compared with the no intervention *** In conclusion, symptomatic cholelithiasis patients who undergo cholecystectomy can reduce the incidence of subsequent cholangiocarcinoma, while cholelithiasis patients who undergo ES/EPBD are at a great risk of subsequent cholangiocarcinoma according to our findings.

关键词： Cholangiocarcinoma Endoscopic sphincterotomy Endoscopic papillary balloon dilatation Cholecystectomy

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NUMERICAL SOLUTION OF INCOMPRESSIBLE VISCOUS FLOW OVER AEROFOIL WITH H-TYPE GRID

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Journal of Hydrodynamics 1992年第2期4卷 31-39页

作者： Ren, Anlu shih, Tienmo Zhejiang Univ Hangzhou China

In the computational fluid dynamics there are three types of body-fitting grid generation method for incompressible viscous flow over an aerofoil, i.e. O-type, C-type and H-type. The numerical solution of H-type grid and a special difference scheme were obtained. In order to prevent the oscillation of pressure, u was defined at the nodes of the mesh, but v and p were defined as staggered grid. Upwind scheme in the convective terms was used and the iteration with success lower relaxation of implicit difference equations were unconditional stability. The method of mass flux correction was introduced with the success in order to accelerate convergence in iteration of velocity and pressure calculation. Numerical results indicate that H-type grid generation is successful to solve problem of external flow and artificial compressity method with correction technique of total mass flux can improve convergence rate.

关键词： Aircraft Wings Flow of Fluids Boundary Layer

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Resistance projection welding for TO-Can style package

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Acta Metallurgica Sinica(English Letters) 2009年第4期22卷 255-262页

作者： Her-Yueh Huang Kuang-Hung tseng Department of Materials Science and Engineering National Formosa University Department of Materials Engineering National Pingtung University of Science and Technology

The effects of the process parameters on the joint quality of TO-Can using resistance projection welding were investigated. A capacitor discharge stored energy welding machine was used for joining caps and headers both coated with nickel SPCC steel. The electrode materials used in this study were brass and W- Cu alloy. Experimental results indicated that the peak current of the W-Cu electrode was higher than that of the brass electrode, irrespective of the operating pressure variation. Increased operating pressure influenced the interfacial heat generation and nugget formation. The nugget area increased rapidly with increasing charging voltage, resulting in expulsions and electrodes getting stuck. An acceptable welding zone was found in the relationship between the charging voltage and the operating pressure. Representative test specimens of the acceptable welding zone satisfactorily passed the helium leak test. The microscopic morphology of the nugget showed a recrystallized fine grain structure resulting in the nugget being harder than with the HAZ.

关键词： Projection welding TO-Can Process parameters Acceptable welding zone Helium leak test

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Carbonyl compounds in dining areas,kitchens and exhaust streams in restaurants with varying cooking methods in Kaohsiung,Taiwan

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Journal of Environmental Sciences 2016年第3期28卷 218-226页

作者： Jen-hsuan Cheng Yi-Shiun Lee Kang-Shin Chen Institute of Environmental Engineering "National" Sun Yat-Sen University

Eighteen carbonyl species in C_1-C_（10） were measured in the dining areas,kitchens and exhaust streams of six different restaurant types in Kaohsiung,southern *** results in the dining areas show that Japanese barbecue（45.06 ppb） had the highest total carbonyl concentrations（sum of 18 compounds）,followed by Chinese hotpot（38.21 ppb）,Chinese stir-frying（8.99 ppb）,Western fast-food（8.22 ppb）,Chinese-Western mixed style（7.38 ppb）,and Chinese buffet（3.08 ppb）,due to their different arrangements for dining and cooking spaces and different cooking *** average,low carbon-containing species（C_1-C_4）,e.g.,formaldehyde,acetaldehyde,acetone and butyraldehyde were dominant and contributed 55.01%-94.52%of total carbonyls in the dining areas of all ***,Chinese-Western mixed restaurants（45.48 ppb） had high total carbonyl concentrations in kitchens mainly because of its small kitchen and poor ***,high carbon-containing species（C_5-C_（10）） such as hexaldehyde,heptaldehyde and nonanaldehyde（16.62%-77.00%of total carbonyls） contributed comparatively with low carbon-containing compounds（23.01%-83.39%of total carbonyls） in ***,Chinese stir-frying（132.10 ppb）,Japanese barbecue（125.62 ppb）,Western fast-food（122.67 ppb）,and Chinese buffet（119.96 ppb） were the four restaurant types with the highest total carbonyl concentrations in exhaust streams,indicating that stir-frying and grilling are inclined to produce polluted *** risk assessments indicate that Chinese hotpot and Japanese barbecue exceeded the limits of cancer risk（10^（-6）） and hazard index（=1）,mainly due to high concentrations of *** other four restaurants were below both limits.

关键词： Carbonyl compounds Restaurant Exhaust stream Health effect

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Acute liver injury in a COVID-19 infected woman with mild symptoms:A case report

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World Journal of Clinical Cases 2023年第2期11卷 472-478页

作者： Pei-hsuan Lai Dah-Ching Ding Department of Obstetrics and Gynecology Hualien Tzu Chi HospitalHualien 970Taiwan

BACKGROUND Coronavirus disease 2019(COVID-19)has spread rapidly,resulting in a pandemic in January *** studies have focused on the natural history and consequences of acute liver injury(ALI)in mild or asymptomatic COVID-19 patients,manifested by elevated aminotransferase *** is usually expected for severe COVID-19 ***,we present a COVID-19 case with mild respiratory symptoms and significantly elevated alanine aminotransferase(ALT)and aspartate aminotransferase(AST)*** SUMMARY A 60-year-old woman without medical history or chronic illness received three COVID-19 vaccinations since the start of the *** patient was infected with severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and presented with mild symptoms on July 12th,***-recovery,she underwent an examination at our hospital on August 30th,*** and ALT levels in the liver function test were 207 U/L(normal value<39,5.3-fold increase)and 570 U/L(normal value<52,10.9-fold increase),*** patient was diagnosed with ALI,and no treatment was *** following week,blood tests showed a reduction in both levels(ALT 124 U/L,AST 318 U/L).Two weeks later,AST and ALT levels had decreased to near the expected upper limits(ALT 40 U/L,AST 76 U/L).CONCLUSION Clinicians should pay attention to liver function testing during COVID-19 recovery regardless of the disease’s severity.

关键词： COVID-19 Hepatitis Pneumonia Aspartate aminotransferase Alanine aminotransferase Case report

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Culturing the Segments of Bryopsis hypnoides Lamouroux Thalli Regenerated from Protoplast Aggregations

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Journal of Integrative Plant Biology 2006年第2期48卷 190-196页

作者： Guang-Ce Wang Cheng-Kui tseng Institute of Oceanology the Chinese Academy of Sciences Qingdao 266071 China

Bryopsis hypnoides Lamouroux was regenerated In vitro from the protoplasm squeezed out from wild algae and the regenerated Individuals had an advantage over Indlvlduala from the wild In terms of growth. Culturing of segments of thalll also showed that segments from the regenerated algae grew better than those from individuals from the wild. The segment that corresponds to a part of a cell, at least a part of the protoplasm, can develop Into a mature Individual, Including rhlzold and thallus, suggesting that a multlnucleate alga, such as B. hypnoides, Is different from higher plants, whose totlpotancy Is based on an Intact cell （or protoplasm）. Further cultivation of mature Individuals from segments Indicated that the organelles In the thallus had two ways In which they could survive when the alga was on the decline：（Ⅰ） the organelles were transferred Into a ball with a gelatinous envelope through a formed pipe and the ball seemed to be capable of being propagated; and （Ⅱ） the organelles were aggregated In the thallus and then moved to the outside. An Interesting result Is that one organelle aggregation located outside the thallus germinated and developed Into a mature alga, although most organelle aggregations gradually lost vitality and died. The results of the present study reveal that the aggregation of organelles can regenerate a stronger organism than Individuals from the wild owing to the complete exchange of genetic material and may possibly enable organelles to survive in unfavorable surroundings.

关键词： aggregation Bryopsis hypnoides culturing thallus segment development germination protoplast.

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K-theoretic classification of fermionic operator mixings in holographic conformal field theories

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Science Bulletin 2016年第14期61卷 1115-1125页

作者： shih-Hao Ho Feng-Li Lin Department of Physics Taiwan Normal University

In this paper, we apply the K-theory scheme of classifying the topological insulators/superconductors to classify the topological classes of the massive multi-flavor fermions in anti-de Sitter(Ad S) space. In the context of Ad S/conformal field theory(CFT) correspondence, the multi-flavor fermionic mass matrix is dual to the pattern of operator mixing in the boundary CFT. Thus, our results classify the possible patterns of operator mixings among fermionic operators in the holographic CFT.

关键词： Topological insulators/superconductorsSPT phases AdS/CFT correspondence K-theoretical classification Bulk/Edgecorrespondence Holographic CFT

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Effects of the Process Parameters on Austenitic Stainless Steel by TIG-Flux Welding

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Journal of Materials Science & Technology 2006年第3期22卷 367-374页

作者： Heryueh HUANG Shengwen SHYU Kuanghung tseng Changpin GHOU Department of Mechanical Engineering National Chiao Tung University Hsinchu 300 Taiwan China ARITEX Products Co. Ltd. Kaohsiung County 831 Taiwan China

The effects of the process parameters of TIG （tungsten inset gas）-flux welding on the welds morphology, angular distortion, ferrite content and hot cracking in austenitic stainless steel were investigated. Autogenous TIG welding process was applied to the type 304 stainless steel through a thin layer of activating flux to produce a bead on plate welded joint. TiO2, SiO2, Fe2O3, Cr2O3, ZnO and MnO2 were used as the activating fluxes. The experimental results indicated that the TIG-flux welding can increase the weld depth/width ratio and reduce the HAZ （heat affected zone） range, and therefore the angular distortion of the weldment can be reduced. It was also found that the retained ferrite content within the TIG-flux welds is increased, and has a beneficial effect in reducing hot cracking tendency for stainless steels of the austenitic type weld metals. A plasma column constriction increases the current density at the anode spot and then a substantial increase in penetration of the TIG-flux welds can be obtained.

关键词： TIG-flux welding Welds morphology Angular distortion Hot cracking

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Stabilization and H-infinity control for interval descriptor systems

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控制理论与应用（英文版） 2010年第3期8卷 344-350页

作者： shih-Wei KAU Department of Electrical Engineering National Kaohsiung University of Applied Sciences

This paper considers H-infinity control problem for interval descriptor systems. Necessary and sufficient LMI-based conditions are derived for quadratic-like H-infinity control analysis of interval descriptor systems. Using the analysis result, two types of feedback controllers are designed so that the closed-loop interval descriptor systems are admissible with H-infinity-norm less than a prescribed value. To the best of the authors＇s knowledge, this is the first paper to deal with the H-infinity control problem of interval descriptor systems in the literature.

关键词： Interval descriptor systems Linear matrix inequalities Robust H-infinity control

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