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Defect Detection Model Using Time Series Data Augmentation and Transformation

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Computers, Materials & Continua 2024年第2期78卷 1713-1730页

作者： Gyu-Il Kim Hyun Yoo Han-jin Cho Kyungyong chung Department of Computer Science Kyonggi UniversitySuwon-si16227Korea Contents Convergence Software Research Institue Kyonggi UniversitySuwon-si16227Korea Department of Energy IT Engineering Far East UniversityEumsung-gun27601Korea Division of AI Computer Science and Engineering Kyonggi UniversitySuwon-si16227Korea

Time-series data provide important information in many fields,and their processing and analysis have been the focus of much ***,detecting anomalies is very difficult due to data imbalance,temporal dependence,and ***,methodologies for data augmentation and conversion of time series data into images for analysis have been *** paper proposes a fault detection model that uses time series data augmentation and transformation to address the problems of data imbalance,temporal dependence,and robustness to *** method of data augmentation is set as the addition of *** involves adding Gaussian noise,with the noise level set to 0.002,to maximize the generalization performance of the *** addition,we use the Markov Transition Field(MTF)method to effectively visualize the dynamic transitions of the data while converting the time series data into *** enables the identification of patterns in time series data and assists in capturing the sequential dependencies of the *** anomaly detection,the PatchCore model is applied to show excellent performance,and the detected anomaly areas are represented as heat *** allows for the detection of anomalies,and by applying an anomaly map to the original image,it is possible to capture the areas where anomalies *** performance evaluation shows that both F1-score and Accuracy are high when time series data is converted to ***,when processed as images rather than as time series data,there was a significant reduction in both the size of the data and the training *** proposed method can provide an important springboard for research in the field of anomaly detection using time series ***,it helps solve problems such as analyzing complex patterns in data lightweight.

关键词： Defect detection time series deep learning data augmentation data transformation

Towards the optimal interstitial doping for halide perovskites

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Nano Research Energy 2023年第3期2卷 5-7页

作者： Sang-Hyun Chin jin-wook Lee Department of Nano Science and Technology and Department of Nanoengineering Sungkyunkwan University(SKKU)Advanced Institute of Nanotechnology(SAINT)Sungkyunkwan UniversitySuwon 16419Republic of Korea SKKU Institute of Energy Science&Technology(SIEST) Sungkyunkwan UniversitySuwon 16419Republic of Korea

Interstitial doping has been considered as an effective strategy to passivate and immobilize the ionic defects of metal halide perovskites to enhance performance and stability of perovskite solar ***,high dopant dosage causes lattice distortion which results in micro-strain and subsequent phase *** highlight discusses the latest report regarding optimal interstitial doping with a multivalent alkali metal cation for perovskites and awaiting issues associated with it.

关键词： perovskites solar cells interstitial doping defect passivation stability

Development of a Core Set from a Large Rice Collection using a Modified Heuristic Algorithm to Retain Maximum Diversity

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Journal of Integrative Plant Biology 2009年第12期51卷 1116-1125页

作者： Hun-Ki chung Kyu-Won Kim Jong-wook chung Jung-Ro Lee Sok-Young Lee Anupam Dixit Hee-Kyoung Kang Weiguo Zhao Kenneth L. McNally Ruraidh S. Hamilton Jae-Gyun Gwag Yong-jin Park National Agrobiodiversity Center National Academy of Agricultural Science Suwon 441-707 Korea Department of Plant Resources College of Industrial Sciences Kongju National University Yesan 340-802 Korea Rice DNA and Quality Testing Laboratory Basmati Export Development Foundation SVBP University of Agriculture and Technology Meerut 250110 India Department of Horticultural Science College of Industrial Science Kongju National University Yesan 340-802 Korea jiangsu University of Science and Technology Seficultural Research Institute Chinese Academy of Agricultural Sciences Zhenjiang 212018 China Genetic Resources Center International Rice Research Institute Metro Manila 1301 Philippines

A new heuristic approach was undertaken for the establishment of a core set for the diversity research of rice. As a result, 107 entries were selected from the 10 368 characterized accessions. The core set derived using this new approach provided a good representation of the characterized accessions present in the entire collection. No significant differences for the mean, range, standard deviation and coefficient of variation of each trait were observed between the core and existing collections. We also compared the diversity of core sets established using this Heuristic Core Collection （HCC） approach with those of core sets established using the conventional clustering methods. This modified heuristic algorithm can also be used to select genotype data with allelic richness and reduced redundancy, and to facilitate management and use of large collections of plant genetic resources in a more efficient way.

关键词： core collection genetic diversity heuristic core collection Oryza sativa sampling strategy.

Is there a correlation between the outcome of transurethral resection of prostate and preoperative degree of bladder outlet obstruction？

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Asian Journal of Andrology 2012年第4期14卷 556-559页

作者： Mi Mi Oh jin wook Kim Je long Kim Du Geon Moon Department of Urology Korea University Medical Center Seou1435-766 Korea Department of Urology Korea University Medical Center and Korea University Institute of Regenerative Medicine Seeu1435-766 Korea

To compare the impact of transurethral resection of prostate （TURP） on symptom scores and maximal flow rates （Qmax） in patients with equivocal bladder outlet obstruction （BOO） and definite BOO and to assess the relationship between the surgical outcomes and degree of preoperative BOO, we prospectively evaluated men with lower urinary tract symptoms and bladder outlet obstruction index （BOO1） greater than 20, who were refractory to conventional medical treatment and underwent TURP. Urodynamic evaluation, International Prostate Symptom Score （IPSS）, uroflowmetry, post-void residual volume （PVR） check and transrectal ultrasound were performed. 20〈B001〈40 was defined as equivocal BOO and BOO1 〉~40 as definite BOO. Changes of IPSS, Qmax, PVR and correlation analysis was performed between the degree of improvement of Qmax, subdomains of I PSS and BOO1. Fifty-four patients showed equivocal BOO and 80 patients showed definite BOO. Preoperatively equivocal BOO group and definite BOO group showed significant differences in maximal bladder capacity and prevalence of detrusor overactivity, whereas no difference was noted in prostate volume. Postoperatively both groups showed improvements in Qmax, obstructive （IPSSO） and irritative （IPSSI） subdomain of IPSS, but the degree of improvement in Qmax and IPSSI subdomain was statistically significantly greater in definite BOO group. The degree of improvement of Qmax and IPSSI showed weak correlation with preoperative BOO1. As a weak correlation was identified between preoperative degree of BOO and outcome of TURP, other factors other than BOO1 such as severity of patients＇ symptoms should be considered in deciding treatment modality.

关键词： bladder outlet obstruction bladder outlet obstruction index International Prostate Symptom Scores

Gene-diet interactions in gastric cancer risk: A systematic review

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World Journal of Gastroenterology 2014年第28期20卷 9600-9610页

作者： Jeongseon Kim Young Ae Cho wook jin Choi Seung Hwa Jeong Molecular Epidemiology Branch Division of Cancer Epidemiology and PreventionResearch InstituteNational Cancer Center

AIM:To conduct a systematic review of the published epidemiological studies investigating the association of the interactions between gene variants and dietary intake with gastric cancer ***:A literature search was conducted in PubMed,EMBASE,and MEDLINE for articles published between January 2000 and July 2013,and 38 studies were *** studies included various dietary factors(e.g.,fruits and vegetables,soybean products,salt,meat,and alcohol)and genetic variants that are involved in various metabolic ***:Studies suggest that individuals who carry high-risk genetic variants and demonstrate particular dietary habits may have an increased risk of gastric cancer compared with those who do not carry high-risk genetic *** dietary patterns and variations in the frequency of genetic variants may explain the higher incidence of gastric cancer in a particular ***,most previous studies have limitations,such as a small sample size and a retrospective casecontrol *** addition,past studies have been unable to elucidate the specific mechanism in gene-diet interaction associated with gastric ***:Additional large prospective epidemiological and experimental studies are required to identify the gene-diet metabolic pathways related to gastric cancer susceptibility.

关键词： Gastric cancer Gene Diet Interaction

Improved photocatalytic activity of surface charge functionalized ZnO nanoparticles using aniline

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Journal of Materials Science & Technology 2021年第17期76卷 1-10页

作者： Chatchai Rodwihok Korakot Charoensri Duangmanee Wongratanaphisan Won Mook Choi Seung Hyun Hur Hyun jin Park jin Suk chung School of Chemical Engineering University of Ulsan680-749.South ICorea Department of Biotechnology College of Life Sciences andBiotechnologyKorea University145 Anam-roSeongbuk-guSeoul02841South Korea Research Center in Physics andAstronomy Faculty of ScienceChiang Mai UniversityChiang Mai50200Thailand

Functionalization of aniline molecules on zinc oxide(ZnO)nanoparticles is reported using a simple impregnation *** ZnO samples were systematically characterized based on morphology,surface and optical properties,and photocatalytic performance towards methyl orange(MO).Aniline functionalization increased the surface charge of the modified *** to pristine ZnO,the aniline-functionalized ZnO yielded faster photodegradation of MO,degrading 98.29%of MO in 60 min and superoxide radicals were the major species during the MO photodegradation *** results indicate that the improvement of photocatalytic degradation could be attributed to opposite charge-induced surface ***,protonated amine as a positively charged molecule was expected to increase the surface adsorption of MO(as an anionic dye)on ZnO nanoparticles surfaces,thereby increasing their photocatalytic degradation performance.

关键词： Photocatalysts Surface charge ZnO Aniline Methyl orange

Fabrication of La,Ce co-doped ZnO nanorods for improving photodegradation of methylene blue

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Journal of Rare Earths 2024年第1期42卷 76-83,I0003页

作者： Erfan Hakim Azmal Zaid jin-chung Sin Sze-Mun Lam Abdul Rahman Mohamed School of Chemical Engineering Universiti Sains Malaysia(USM)14300Nibong TebalPenangMalaysia College of Environmental Science and Engineering Guilin University of TechnologyGuilin541004China Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control Guilin University of TechnologyGuilin541004China Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area Guilin University of TechnologyGuilin541004China Faculty of Engineering and Green Technology Universiti Tunku Abdul RahmanJalan UniversitiBandar Barat31900KamparPerakMalaysia

La,Ce co-doped ZnO nanorods(ZnLC)were synthesized through a one-step solvothermal *** photocatalysts were characterized by X-ray diffraction,Raman spectroscopy,field-emission scanning electron microscopy,energy dispersive X-ray,transmission electron microscopy,UV-vis diffuse reflectance spectroscopy and photo luminescence *** La and Ce doping enhanced the visible light absorption ability of ZnLC and a red shift was detected for *** simulated solar light irradiation,the ZnO doped with 3 at%La and 1 at%Ce(ZnLC1)degrades methylene blue(MB)more effectively than those of pure ZnO,La-doped ZnO(ZnL)and commercially available *** improved photocatalytic performance of ZnLC1 can be attributed to the high charge separation efficiency as demonstrated by the photoluminescence ***,the photocatalytic experiments reveal that several parameters have their own impact on the MB *** a variety of radical scavengers,it is discovered that superoxide anion radical plays a crucial role in the degradation of *** ZnLC1 is also reused several times without noticeable decrease of photoactivity,indicating that it has a substantial potential for environmental remediation applications.

关键词： ZnO Lanthanum Cerium Co-doping Photodegradation Rare earths

Observational constraints on running vacuum model

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Chinese Physics C 2019年第2期43卷 132-137页

作者： jin-Jun Zhang chung-Chi Lee Chao-Qiang Geng School of Physics and Information Engineering Shanxi Normal University DAMTP Centre for Mathematical Sciences University of Cambridge Department of Physics National Tsing Hua University National Center for Theoretical Sciences

We investigate the power spectra of the CMB temperature and matter density in the running vacuum model(RVM) with the time-dependent cosmological constant of A=3 vH^2+ Λ_0, where H is the Hubble parameter. In this model, dark energy decreases in time and decays to both matter and radiation. By using the Markov chain Monte Carlo method, we constrain the model parameter v as well as the cosmological observables. Explicitly, we obtain v ≤1.54× 10^(-4)(68% confidence level) in the RVM with the best-fit χ_(RVM)~2 =13968.8, which is slightly smaller thanχ_(ΛCDM)~2= 13969.8 in the ΛCDM model of v = 0.

关键词： matter power spectrum running vacuum model CMB temperature spectrum cosmological constant

In-situ electrochemical functionalization of carbon materials for high-performance Li–O2 batteries

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Journal of Energy Chemistry 2020年第9期29卷 7-13,I0001页

作者： Jungwon Kang jin Min Kim Do Youb Kim Jungdon Suk Jaekook Kim Dong wook Kim Yongku Kang Department of Advanced Materials Science and Engineering Mokpo National University61 dorim-ri1666 Yeongsan-roCheonggye-myeonMuan-gunJeonnamSouth Korea Center for Advanced Battery Materials Advanced Materials DivisionKorea Research Institute of Chemical Technology(KRICT)141 Gajeong-RoYuseong-GuDaejeon 305-600South Korea Department of Materials Science and Engineering Chonnam National University300 Yongbong-dongBukguGwangju 500-757South Korea

The development of effective synthetic routes is important to manifest proper nature of specific ***-situ electrochemical functionalization possesses great advantages over conventional routes,especially facile way and leading to reaching elaborate sites of functional ***,we demonstrate the preparation of functionalized carbons by in-situ electrochemical reduction in an argon atmosphere for application in low-cost,environmentally benign,and high-performance oxygen-electrodes for non-aqueous Li-O2 batteries.A Li-O2 battery with functionalized carbon shows a high discharge capacity(100 times that of pristine carbon),high power and cycling *** outstanding performance is attributed to the high O2 affinity of the functionalized carbon surface that facilitates the formation of soluble and diffusible superoxide intermediates by the reduction of the remaining O2 competing with surface growth for Li2O2 formation.

关键词： Lithium-oxygen battery High areal capacity Functionalization of carbon Electrochemistry