检索结果-南通市图书馆

A Deep Learning Hierarchical Ensemble for Remote Sensing Image Classification

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第8期72卷 2649-2663页

作者： Seung-yeon hwang jeong-Joon Kim Department of Computer Engineering Anyang UniversityAnyang-si14028Korea Department of ICT Convergence Engineering Anyang UniversityAnyang-si14028Korea

Artificial intelligence,which has recently emerged with the rapid development of information technology,is drawing attention as a tool for solving various problems demanded by society and *** particular,convolutional neural networks(CNNs),a type of deep learning technology,are highlighted in computer vision fields,such as image classification and recognition and object *** these CNN models requires a large amount of data,and a lack of data can lead to performance degradation problems due to *** CNN architecture development and optimization studies become active,ensemble techniques have emerged to perform image classification by combining features extracted from multiple CNN *** this study,data augmentation and contour image extraction were performed to overcome the data shortage *** addition,we propose a hierarchical ensemble technique to achieve high image classification accuracy,even if trained from a small amount of ***,we trained the UCMerced land use dataset and the contour images for each image on pretrained VGGNet,GoogLeNet,ResNet,DenseNet,and *** then apply a hierarchical ensemble technique to the number of cases in which each model can be *** experiments were performed in cases where the proportion of training datasets was 30%,50%,and 70%,resulting in a performance improvement of up to 4.68%compared to the average accuracy of the entire model.

关键词： Image classification deep learning CNNs hierarchical ensemble UC-Merced land use dataset contour image

Data Augmentation Using Contour Image for Convolutional Neural Network

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2023年第6期75卷 4669-4680页

作者： Seung-yeon hwang jeong-Joon Kim Department of Computer Engineering Anyang UniversityAnyang-si14058Korea Department of ICT Convergence Engineering Anyang UniversityAnyang-si14058Korea

With the development of artificial intelligence-related technologies such as deep learning,various organizations,including the government,are making various efforts to generate and manage big data for use in artificial ***,it is difficult to acquire big data due to various social problems and restrictions such as personal information *** are many problems in introducing technology in fields that do not have enough training data necessary to apply deep learning ***,this study proposes a mixed contour data augmentation technique,which is a data augmentation technique using contour images,to solve a problem caused by a lack of ***,a famous convolutional neural network(CNN)architecture,and CIFAR-10,a benchmark data set,are used for experimental performance evaluation to prove the superiority of the proposed *** to prove that high performance improvement can be achieved even with a small training dataset,the ratio of the training dataset was divided into 70%,50%,and 30%for comparative *** a result of applying the mixed contour data augmentation technique,it was possible to achieve a classification accuracy improvement of up to 4.64%and high accuracy even with a small amount of data *** addition,it is expected that the mixed contour data augmentation technique can be applied in various fields by proving the excellence of the proposed data augmentation technique using benchmark datasets.

关键词： Data augmentation image classification deep learning convolutional neural network mixed contour image benchmark dataset

A Universal Activation Function for Deep Learning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2023年第5期75卷 3553-3569页

作者： Seung-yeon hwang jeong-Joon Kim Department of Computer Engineering Anyang UniversityAnyang-si14028Korea Department of ICT Convergence Engineering Anyang UniversityAnyang-si14028Korea

Recently,deep learning has achieved remarkable results in fields that require human cognitive ability,learning ability,and reasoning *** functions are very important because they provide the ability of artificial neural networks to learn complex patterns through *** activation functions are being studied to solve problems such as vanishing gradients and dying nodes that may occur in the deep learning ***,it takes a lot of time and effort for researchers to use the existing activation function in their ***,in this paper,we propose a universal activation function(UA)so that researchers can easily create and apply various activation functions and improve the performance of neural *** can generate new types of activation functions as well as functions like traditional activation functions by properly adjusting three *** famous Convolutional Neural Network(CNN)and benchmark datasetwere used to evaluate the experimental performance of the UA proposed in this *** compared the performance of the artificial neural network to which the traditional activation function is applied and the artificial neural network to which theUA is *** addition,we evaluated the performance of the new activation function generated by adjusting the hyperparameters of *** experimental performance evaluation results showed that the classification performance of CNNs improved by up to 5%through the UA,although most of them showed similar performance to the traditional activation function.

关键词： Deep learning activation function convolutional neural network benchmark datasets universal activation function

Time-Aware PolarisX: Auto-Growing Knowledge Graph

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第6期67卷 2695-2708页

作者： yeon-Sun Ahn Ok-Ran jeong Department of Software Gachon UniversityGyeonggi-do13120Korea

A knowledge graph is a structured graph in which data obtained from multiple sources are standardized to acquire and integrate human *** is being actively conducted to cover a wide variety of knowledge,as it can be applied to applications that help ***,existing researches are constructing knowledge graphs without the time information that knowledge *** stored without time information becomes outdated over time,and in the future,the possibility of knowledge being false or meaningful changes is *** a result,they can’t reect information that changes dynamically,and they can’t accept information that has newly *** solve this problem,this paper proposes Time-Aware PolarisX,an automatically extended knowledge graph including time *** PolarisX constructed a BERT model with a relation extractor and an ensemble NER model including a time tag with an entity extractor to extract knowledge consisting of subject,relation,and object from unstructured *** two application experiments,it shows that the proposed system overcomes the limitations of existing systems that do not consider time information when applied to an application such as a ***,we verify that the accuracy of the extraction model is improved through a comparative experiment with the existing model.

关键词： Machine learning natural language processing knowledge graph time-aware information extraction

Salinity intrusion characteristics analysis using EFDC model in the downstream of Geum River

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2010年第6期22卷 934-939页

作者： Sangman jeong Kyusung yeon Youngteck Hur Kukryul Oh Department of Civil and Environmental Engineering Kongju National University Water Resource Operation Center

As social interest in the environmental conservation and ecological restoration has recently increased, more research works have been done to resolve problems concerning environmental management of estuaries. In this study, a three-dimensional numerical model, Environmental Fluid Dynamics Code （EFDC） was used in the analysis of the salinity intrusion characteristics in the downstream of Geum River. The numerical simulation was performed to investigate the influence range for salinity intrusion when the gates were fully opened. The conditions used for simulation were the four flow regimes in Geum River Basin, Korea. Results indicated that the ranges of salinity intrusion from the barrage were 50.72 km （drought flow）, 48.87 km （low flow）, 46.56 km （normal flow） and 42.10 km （flood flow）. These results indicated that the EFDC model used for numerical simulation has high accuracy. The result concluded in this study can be used as a basis in understanding the extent of salinity intrusion effects at different flow rates.

关键词： Environmental Fluid Dynamics Code salinity intrusion barrage

Hepatic artery pseudoaneurysm caused by acute idiopathic pancreatitis

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2012年第18期18卷 2291-2294页

作者： yeon hwa Yu Joo Hyun Sohn Tae Yeob Kim Jae Yoon jeong Dong Soo Han Yong Cheol Jeon Min Young Kim Department of Internal Medicine Hanyang University College of MedicineGuriGyunggi-Do 471-701South Korea Department of Radiology Hanyang University College of MedicineGuri 471-701South Korea

Hepatic artery pseudoaneurysm(HAP) is a very rare disease but in cases of complication,there is a very high *** most common cause of HAP is iatrogenic trauma such as liver biopsy,transhepatic biliary drainage,cholecystectomy and *** may also occur with complications such as infections or inflammation associated with septic *** has been reported rarely in patients with acute *** far as we are aware,there is no report of a case caused by acute idiopathic pancreatitis,*** report a case of HAP caused by acute idiopathic pancreatitis which developed in a 61-year-old *** woman initially presented with acute pancreatitis due to unknown *** conservative management,her symptoms seemed to have *** eight days after admission,abdominal pain abruptly became worse *** computed tomography(CT) was rechecked and it detected a new HAP that was not seen in a previous abdominal *** retrograde cholangiopancreatography(ERCP) was performed because of a suspicion of hemobilia as a cause of aggravated abdominal *** confirmed hemobilia by observing fresh blood clots at the opening of the ampulla and several filling defects in the distal common bile duct on *** any particular treatment such as embolization or surgical ligation,HAP thrombosed *** months after discharge,abdominal CT demonstrated that HAP in the left lateral segment had disappeared.

关键词： Hepatic artery Pseudoaneurysm Pancreatitis Acute Hemobilia

Quantum Systems Connected by a Time-Dependent Canonical Transformation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2009年第9期52卷 416-420页

作者： Kyu hwang yeon jeong Ryeol Choi ZHANG Shou BK21 Physics Program and Department of Physics College of Natural Science Chungbuk National University Cheongju Chungbuk 361-763 Korea School of Electrical Engineering and Computer Science Kyungpook National University 1370 Sankyuk-dong Buk-gu Daegu 702-701 Korea Center for the Condensed-Matter Science and Technology Harbin Institute of Technology Harbin 150001 China Department of Physics College of Science Yanbinn University Yanji 133002 China

We study both classical and quantum relation between two Hamiltonian systems which are mutually connected by time-dependent canonical transformation. One is ordinary conservative system and the other is timedependent Hamiltonian system. The quantum unitary operator relevant to classical canonical transformation between the two systems are obtained through rigorous evaluation. With the aid of the unitary operator, we have derived quantum states of the time-dependent Hamiltonian system through transforming the quantum states of the conservative system. The invariant operators of the two systems are presented and the relation between them are addressed. We showed that there exist numerous Hamiltonians, which gives the same classical equation of motion. Though it is impossible to distinguish the systems described by these Hamiltonians within the realm of classical mechanics, they can be distinguishable quantum mechanically.

关键词： canonical transformation innumerable kind of Hamiltonians canonical quantization invariant operator unitary transformation

Incidental accumulation of Technetium-99m pertechnetate in subacute cerebral infarction: A case report

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2022年第23期10卷 8400-8405页

作者： yeon-Hee Han hwan-jeong jeong Hyun Goo Kang Seok Tae Lim Department of Nuclear Medicine Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University HospitalJounbuk National University Medical School and HospitalJeonju 54907JeonbukSouth Korea Department of Neurology Jeonbuk National University Medical School and HospitalJeonju 54907JeonbukSouth Korea

BACKGROUND When interpreting nuclear medicine images,unexpected findings are sometimes *** these findings and determining the mechanism of their occurrence could have a significant impact on early diagnosis of critical diseases and the appropriate management of *** SUMMARY A 59-year-old man was admitted to the emergency room due to left hemiparesis,left hemifacial palsy,and mild *** 2 wk of hospitalization,the patient complained of dry eyes and ***,salivary scintigraphy was performed to evaluate the functional status of his salivary *** accumulation in the right frontoparietal area was found on salivary ***-attenuated inversion recovery phase magnetic resonance(FLAIR phase MR)image showed diffuse high signal intensity in the same *** and posterior horns of the right lateral ventricle were obliterated and the midline was slightly shifted to the left side due to right frontoparietal *** salivary scintigraphy,Tc-99m pertechnetate was incidentally accumulated in a subacute cerebral infarction *** years after the diagnosis of acute infarction,the second series of salivary scintigraphy showed no abnormal activity in the *** phase MR image also demonstrated markedly decreased high signal intensity in the previous infarction lesion without evidence of swelling indicating chronic cerebral *** This case highlights that Tc-99m pertechnetate could accumulate in a subacute cerebral infarction *** mechanism of an unexpected uptake of Tc-99m pertechnetate in unusual sites should be evaluated and kept in mind for better interpretation.

关键词： Cerebral infarction Tc-99m pertechnetate Salivary scintigraphy Case report

An Overview of Current Oriental Medicine Herbal Cancer Research in Korea

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Integrative Medicine 2011年第4期17卷 251-256页

作者： Jeungwon Yoon hwa-Seung Yoo yeon-Weol Lee Chong-Kwan Cho East-West Cancer Center Dunsan Oriental Medical Hospital of Daejeon UniversityDaejeonRepublic of Korea

Cancer is the number one cause of death in Korea with annual mortalities of 69 *** suggests one in every four Koreans will end up getting cancer at some point in their life *** these persistent threats,strive for cancer cure is continued. Ten years of Korea＇s oriental medicine herbal research on cancer have been reviewed. Researches between the years of 2000 and 2010 are analyzed in terms of their published year,study types,tested subjects,testing measures,cancer types,and *** the past ten years,cancer researches have blossomed from null to full in Korean peninsula, and further development is much anticipated in the next ten years to come.

关键词： oriental medicine herbal research cancer Korea