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Comparison of Layer-stacking and Dempster-Shafer Theory-based Methods Using Sentinel-1 and Sentinel-2 Data Fusion in Urban Land Cover Mapping

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Geo-Spatial Information Science 2022年第3期25卷 425-438页

作者： Dang hung Bui LászlóMucsi Department of Geoinformatics Physical and Environmental GeographyUniversity of SzegedSzegedHungary Institute for Environmental Science Engineering and ManagementIndustrial University of Ho Chi Minh CityHo Chi Minh CityVietnam

Data fusion has shown potential to improve the accuracy of land cover mapping,and selection of the optimal fusion technique remains a *** study investigated the performance of fusing Sentinel-1(S-1)and Sentinel-2(S-2)data,using layer-stacking method at the pixel level and Dempster-Shafer(D-S)theory-based approach at the decision level,for mapping six land cover classes in Thu Dau Mot City,*** the pixel level,S-1 and S-2 bands and their extracted textures and indices were stacked into the different single-sensor and multi-sensor datasets(*** datasets).The datasets were categorized into two *** group included the datasets containing only spectral and backscattering bands,and the other group included the datasets consisting of these bands and their extracted *** random forest(RF)classifier was then applied to the datasets within each *** the decision level,the RF classification outputs of the single-sensor datasets within each group were fused together based on D-S ***,the accuracy of the mapping results at both levels within each group was *** results showed that fusion at the decision level provided the best mapping accuracy compared to the results from other products within each *** highest overall accuracy(OA)and Kappa coefficient of the map using D-S theory were 92.67%and 0.91,*** decision-level fusion helped increase the OA of the map by 0.75%to 2.07%compared to that of corresponding S-2 products in the ***,the data fusion at the pixel level delivered the mapping results,which yielded an OA of 4.88%to 6.58%lower than that of corresponding S-2 products in the groups.

关键词： Land cover mapping data fusion random forest Dempster-Shafer theory optical data radar data pixel level decision level

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Isothermal Gas Forming of Mg Alloy AZ31 Sheet

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Journal of Materials Science & Technology 2002年第3期18卷 227-230页

作者： Yung-hung Jian-YihWang 等 DepartmentofMechanicalEngineering NationalCentralUniversityCHung-liTaiwanChina Chung-ShanInstituteofScience&Technology Lung-tanTaiwanChina

There have been reports on sheet forming of Mg alloy in industry via the punch and die method; this paper is probably the first formal one for studying the sheet formability of AZ31 employing pressurized gas to press the sheet into a female die cavity at various elevated temperatures. The results indicate it is feasible to form a rectangular box via pressurized gas from extruded sheets of 0.5 and 1.7 mm thick. The formed box has 1:2 depth over width ratio, which should be large enough when dealing with realistic industrial sheet forming parts. Presently, forming a sheet of 0.5 mm thick is considered a technical challenge by industry, and it is conquered as demonstrated in this paper. Gas forming technique applied to Mg alloy is unprecedented and shows potential for industrial utilization.

关键词： AZ31 magnesium alloy Sheet formability Microstructure

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长外伸段压缩机转子动力学特性研究

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热能动力工程 2024年第6期39卷 163-168页

作者：龚军军高进黄涛赵仕志东方电气集团东方汽轮机有限公司四川德阳618000

为研究长外伸段压缩机转子动力学特性,采用数值分析和实验相结合的方法研究了压缩机转子外伸段长度、莫顿效应以及弹性联轴器质量对转子动力学特性的影响。研究表明:在转子动力学有限元模型中考虑弹性联轴器质量以及增加转子外伸段长度... 详细信息

为研究长外伸段压缩机转子动力学特性,采用数值分析和实验相结合的方法研究了压缩机转子外伸段长度、莫顿效应以及弹性联轴器质量对转子动力学特性的影响。研究表明:在转子动力学有限元模型中考虑弹性联轴器质量以及增加转子外伸段长度均会降低转子临界转速;莫顿效应引起轴颈处热弯曲产生的热不平衡量和外伸段处的不平衡量共同导致转子外伸段振动大幅增加;适当增加轴承顶隙可有效抑制莫顿效应,从而降低转子进气侧轴振。

关键词：长外伸段转子弹性联轴器莫顿效应外伸段振动动力学特性

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Reversible ischemia on treadmill exercise in left main coronary artery vasospasm

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Chinese Medical Journal 2011年第24期124卷 4364-4367页

作者： hung Ming-yow CHANG Nen-chung hung Ming-jui Division of Cardiology Department of Internal Medicine Shuang Ho Hospital Taipei Medical University Taipei 235 Taiwan China Department of Internal Medicine School of Medicine College of Medicine Taipei Medical University Taipei 110 Taiwan China Division of Cardiology Department of Internal Medicine Taipei Medical University Hospital Taipei 110 Taiwan China Department of Cardiology Chang Gung Memorial Hospital Keelung Chang Gung University College of Medicine Keelung city 20401 Taiwan China

Coronary vasospasm of the left main coronary artery （LMCA） is a rare condition with potentially devastating consequences. We present 2 patients with LMCA vasospasm-related angina, the first being a 46-year-old woman and the second a 51-year-old woman. Both of them developed ST-segment ischemic changes on treadmill exercise tests. Coronary angiography showed spontaneous LMCA vasospasm in one patient and methylergonovine-induced LMCA vasospasm in the other patient. Follow-up treadmill exercise tests revealed no exercise-induced ischemia after calcium antagonist monotherapy. These cases demonstrate the importance of identifying LMCA vasospasm, as the treatment of choice varies in patients with angina pectoris. Reversible myocardial ischemia caused by LMCA vasospastic angina can be controlled by calcium antagonist monotherapy and detected by repeat non-invasive stress testing.

关键词： ischemia treadmill left main coronary artery coronary vasospasm

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Liu-stain quick cytodiagnosis of ultrasound-guided fine needle aspiration in diagnosis of liver tumors

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World Journal of Gastroenterology 2007年第3期13卷 448-451页

作者： Chi-Sin Changchien Jing-Houng Wang Chao-hung hung Chien-hung Chen Chuan-Mo Lee Division of Hepato-Gastroenterology Department of Internal Medicine Chang-Gung Memorial Hospital Kaohsiung Medical Center Chang Gung University College of Medicine Taiwan China

AIM： To combine ultrasound-guided fine-needle aspiration （US-FNA） and Liu （Riu） stain to make a quick study on liver tumor lesions. METHODS： Two hundred and twenty-eight aspirations from 232 patients were completely studied. The operator himself made the quick cytodiagnosis of US-FNA smear stained by Liu method within thirty minutes. The US-FNA specimen was also sent to the pathological department for cytological study and cellblock histology. The result of our Uu-stain quick cytodiagnosis in each patient was confirmed by the final cytopathological diagnosis from pathological report. RESULTS： Among 228 samples, the quick cytodiagnosis revealed 146 malignancies, 81 benign lesions and one inadequate specimen. Cytopathological diagnosis from the pathological department revealed 150 malignancies, and 78 benign lesions. Four well-differentiated hepatocellular carcinomas （HCCs） were under-diagnosed by quick cytodiagnosis as benign and 3 benign lesions were over-diagnosed as well-differentiated HCCs. Compared with cytopathological diagnosis, quick cytodiagnosis correctly diagnosed 143 malignancies and 77 benign lesions. Except for the one inadequate specimen in quick cytodiagnosis, the accuracy of quick cytodiagnosis was 96.9% （220/227）, and its sensitivity, specificity and positive and negative predictive values were 97.9%, 95.1%, 97.3% and 96.3%, respectively. CONCLUSION： Liu-stain quick cytodiagnosis is a fast, convenient, safe and effective method for hepatologists in clinic practice to diagnose liver tumor. In few cases of well-differentiated HCC, Liu-stain quick cytodiagnosis has its limitation.

关键词： Liver tumor Cytology Ultrasound guided FNA Liu stain

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Status of bone quality in adolescent idiopathic scoliosis patients with low bone mass-using calcaneal quantitative ultrasound

Status of bone quality in adolescent idiopathic scoliosis pa...

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International Conference on Osteoporosis and Bone Research 2008

作者： Vivian Wing-yin hung hiu-yan Yeung Jack Chun-yiu Cheng Department of Orthopaedics and Traumatology The Chinese University of Hong KongHong KongChina

＜正＞Quantitative ultrasound （QUS）,a radiation free densitometer,has been widely used in assessing the quality of bone *** published data showed that about 30% Adolescent Idiopathic Scoliosis （AIS） girls have lower bone mineral density （BMD） as compared with their ***,only a few studies on the structural and

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A FRAMEWORK OF SETTING UP GOAL CONTROL LIMITS OF TARGET COSTING FOR NON-NORMAL DISTRIBUTIONS

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Journal of Systems Science and Systems Engineering 2007年第4期16卷 424-433页

作者： Hsin-hung WU Fong-Jung YU Department of Business Administration National Changhua University of Education Changhua Taiwan China Department of Industrial Engineering and Technology Management Da-Yeh University Changhua Taiwan China

This study provides a framework of target costing to extend its original scope when the underlying distribution is non-normal. The new specification limits can be derived by listening to the market price from Taguchi loss function. Later, the new specification limits can be linked through the non-normality-based C^^pk value along with non-normality-based X^^-Rcontrol charts to derive goal control limits. Moreover, an example is provided to illustrate the usefulness of the proposed framework of target costing by relentlessly reducing cost and improving product quality to gain competitiveness in the marketplace.

关键词： Target costing Taguchi loss function goal control limit process capability index non-normal distribution

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Synergistic Multilayer Adsorption for Low Concentration Dyestuffs by Biomass

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Chinese Journal of Chemical Engineering 2012年第3期20卷 560-566页

作者： Keith Kim hung Choy Gordon Mckay Department of Chemical and Biomolecular Engineering the Hong Kong University of Science and TechnologyHong KongChina

Due to the high cost of adsorbents and their thermal regeneration in recent years, much research has fo- cused on the search for cheaper adsorbents for treating wastewater from textile industry. The single component ad-sorption of an acidic dye, Acid Yellow 117, and a basic dye, Methylene Blue, onto several adsoroents-bamooo, waste wood, bamboo char, waste wood char, bamboo activated carbon, wood activated carbon and active carbon F400 were conducted. Based on a Langmuir analysis, the monolayer adsorption capacities were determined. Three of the adsorbents were selected for binary layer adsorption to check the multilayer concept and the potential application for better adsorbent usage. The two cheapest adsorbents, bamboo and wood are compared with the commer-cial activated carbon F400, and all three systems were successful.

关键词： multilayer adsorption biomass dyestuffs

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Numerical characteristics of the full operator hybrid simulation method

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Earthquake Engineering and Engineering Vibration 2011年第3期10卷 453-463页

作者： Chung-Chan hung Yong-Song Chen Department of Civil Engineering Central University （NCU） Chinese Taipei Department of Mechanical Engineering Chung Cheng University （NCCU） Chinese Taipei

The full operator method （FOM） has been proposed to overcome some of the shortcomings of the commonly used operator splitting method （OSM）. In particular, the FOM is improved by increasing the accuracy of both the predictor and corrector using the estimated tangent stiffness of the tested structure. The numerical characteristics of the FOM, including stability and accuracy, are investigated in this study. It is shown that FOM is conditionally stable. The stability and accuracy characteristics are dependent on the accuracy of the estimated tangent stiffness and the parameters associated with the acceleration variation in the time-stepping integration method. Mass-spring systems with different types of nonlinearity, including hardening, stiffening, and softening behavior, are used to evaluate the performance of the FOM. It is found that the FOM can capture these types of nonlinearity with satisfactory accuracy. Using a prototype 12-story composite coupled wall system, the influences of the strong nonlinearity of the system as well as the displacement control errors from hydraulic actuators on the performance of the FOM are explored. The results show that the FOM is capable of generating reasonably accurate results despite the presence of strong structural nonlinearity and displacement control errors.

关键词： hybrid simulation tangent stiffness numerical characteristic composite coupled wall system collapse behavior nonlinear behavior

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Exploratory analysis of grocery product networks

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Journal of Management Analytics 2022年第2期9卷 169-184页

作者： Ping-hung Hsieh College of Business Oregon State UniversityCorvallisOR 97331USA

Finding meaningful sets of co-purchased products allows retailers to manageinventory better and develop market strategies. Analyzing the baskets ofproducts, known as market basket analysis, is typically carried out usingassociation rule mining or community detection approach. This article usesboth methods to investigate a transaction dataset collected from a brick-andmortargrocery store. The findings reveal interesting purchasing patterns oflocal residents and prompt us to consider dynamic modeling of the productnetwork in the future.

关键词： market basket analysis association rules community detection graph theory social networks transaction data

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