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Structural and electrochemical stabilization enabling high.energy P3-type Cr-based layered oxide cathode for K-ion batteries

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Carbon energy 2024年第5期6卷 81-93页

作者： Wonseok Ko Seokjin lee hyunyoung Park Jungmin Kang Jinho Ahn Yongseok lee Gwangeon oh Jung-Keun Yoo Jang-Yeon hwang Jongsoon Kim Department of energy Science Sungkyunkwan UniversitySuwonRepublic of Korea SKKU Institute of energy Science and Technology(SIeST) Sungkyunkwan UniversitySuwonRepublic of Korea Department of energy engineering Hanyang UniversitySeoulRepublic of Korea Carbon Composites Department Korea Institute of Materials Science(KIMS)ChangwonRepublic of Korea Department of Battery engineering Hanyang UniversitySeoulRepublic of Korea

Layered-type transition metal(TM)oxides are considered as one of the most promising cathodes for K-ion batteries because of the large theoretical gravimetric capacity by low molar ***,they suffer from severe structural change by de/intercalation and diffusion of K^(+)ions with large ionic size,which results in not only much lower reversible capacity than the theoretical capacity but also poor power ***,it is important to enhance the structural stability of the layered-type TM oxides for outstanding electrochemical behaviors under the K-ion battery ***,it is investigated that the substitution of the appropriate Ti^(4+)contents enables a highly enlarged reversible capacity of P3-type KxCrO_(2) using combined studies of first-principles calculation and various *** the pristine P3-type KxCrO_(2) just exhibits the reversible capacity of∼120 mAh g^(−1) in the voltage range of 1.5-4.0 V(vs.K^(+)/K),the∼0.61 mol K^(+)corresponding to∼150 mAh g^(−1) can be reversible de/intercalated at the structure of P3-type K0.71[Cr_(0.75)Ti_(0.25)]O_(2) under the same ***,even at the high current density of 788 mA g^(−1),the specific capacity of P3-type K0.71[Cr_(0.75)Ti_(0.25)]O_(2) is∼120 mAh g^(−1),which is∼81 times larger than that of the pristine P3-type KxCrO_(2).It is believed that this research can provide an effective strategy to improve the electrochemical performances of the cathode materials suffered by severe structural change that occurred during charge/discharge under not only K-ion battery system but also other rechargeable battery systems.

关键词： cathodes first-principles calculations layered-type oxide materials potassium-ion batteries structural stabilization

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Mixed-dimensional stacked nanocomposite structures for a specific wavelength-selectable ambipolar photoresponse

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Nano Research 2024年第6期17卷 5549-5558页

作者： Young jae Park jaeho Shim Joo Song lee Kyu Seung lee Ji-Yeon Kim Kang Bok Ko Sang-Youp Yim Seongjun Kim hoon-Kyu Shin Dongh.e Park Yong Ju Yun Dong Ick Son Institute of Advanced Composite Materials Korea Institute of Science and TechnologyJeollabuk-do 55324Republic of Korea National Institute for Nanomaterials Technology Pohang University of Science and TechnologyGyeongsangbuk-do 37673Republic of Korea Department of Semiconductor Science and Technology Semiconductor Physics Research CenterJeonbuk National UniversityJeonju 54896Republic of Korea Advanced Photonics Research Institute Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea Center for Opto-electronic Materials and Devices Post-Silicon Semiconductor InstituteKorea Institute of Science and TechnologySeoul 02792Republic of Korea Graduate School of energy and environment(KU-KIST Green School) Korea UniversitySeoul 02841Republic of Korea KIST School Department of Nanomaterials and Nano ScienceUniversity of Science and Technology(UST)Daejeon 34113Republic of Korea

Mixed-dimensional composite structures using zero-dimensional(0D)quantum dots(QDs)and two-dimensional(2D)transition metal dichalcogenides(TMDs)materials are expected to attract great interest in optoelectronics due to the potential to generate new optical ***,we report on the unique optical characteristics of a devices with mixed dimensional vertically stacked structures based on tungsten diselenide(WSe_(2))/CdSeS QDs monolayer/molybdenum disulfide(MoS_(2))(2D/0D/2D).Specifically,it exhibits an ambipolar photoresponse characteristic,with a negative photoresponse observed in the 400-600 nm wavelength range and a positive photoresponse appeared at 700 nm *** resulted in the high negative responsivity of up to 52.22 mA·W^(−1)under 400 nm,which is 163 times higher than that of the photodetector without CdSeS *** also demonstrated the negative photoresponse,which could be due to increased carrier collision probability and non-radiative *** modeling and simulation reveal that Auger recombination among the types of non-radiative recombination is the main cause of negative photocurrent ***,we discovered ambipolar photoresponse near a specific wavelength corresponding to the energy of quantum *** study revealed interesting phenomenon in the mixed low-dimensional stacked structure and paved the way to exploit it for the development of innovative photodetection materials as well as for optoelectronic applications.

关键词： mixed-dimension quantum dot heterostructure photodetector ambipolar photoresponse

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Surface-functionalized hole-selective monolayer for high.efficiency single-junction wide-bandgap and monolithic tandem perovskite solar cells

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Journal of energy Chemistry 2024年第1期88卷 317-326,I0008页

作者： Devthade Vidyasagar Yeonghun Yun jae Yu Cho h.emin lee Kyung Won Kim Yong Tae Kim Sung Woong Yang Jina Jung Won Chang Choi Seonu Kim Rajendra Kumar Gunasekaran Seok Beom Kang Kwang heo Dong h.e Kim jaeyeong heo Sangwook lee School of Materials Science and engineering Kyungpook National UniversityDaegu 41566Republic of Korea Department of Materials Science and engineering and Optoelectronics Convergence Research CenterChonnam National UniversityGwangju 61186Republic of Korea Department of Materials Science and engineering Korea UniversitySeoul 02841Republic of Korea Department of Nanotechnology and Advanced Materials engineering Sejong UniversitySeoul 05006Republic of Korea

Carbazole moiety-based 2PACz([2-(9h-carbazol-9-yl)ethyl]phosphonic acid)self-assembled monolayers(SAMs)are excellent hole-selective contact(hSC)materials with abilities to excel the charge-transferdynamics of perovskite solar cells(PSCs).herein,we report a facile but powerful method to functionalize the surface of 2PACz-SAM,by which reproducible,highly stable,high.efficiency wide-bandgap PSCs can be *** 2PACz surface treatment with various donor number solvents improves assembly of 2PACz-SAM and leave residual surface-bound solvent molecules on 2PACz-SAM,which increases perovskite grain size,retards halide segregation,and accelerates hole *** surface functionalization ach.eves a high power conversion efficiency(PCe)of 17.62%for a single-junction wide-bandgap(~1.77 e V)*** also demonstrate a monolithic all-perovskite tandem solar cell using surfaceengineered hSC,showing high PCe of 24.66%with large open-circuit voltage of 2.008 V and high fillfactor of 81.45%.Our results suggest this simple approach can further improve the tandem device,when coupled with a high-performance narrow-bandgap sub-cell.

关键词： Perovskite solar cells 2PACz Monolithic tandem solar cells Wide bandgap

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Glucose-mediated mitochondrial reprogramming by cholesterol export at TM4SF5-enriched mitochondria-lysosome contact sites

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Cancer Communications 2024年第1期44卷 47-75页

作者： Ji eon Kim So-Young Park Chulhwan Kwak Yoonji lee Dae-Geun Song jae Woo Jung h.esong lee eun-Ae Shin Yangie Pinanga Kyung-h.e Pyo eun h.e lee Wonsik Kim Soyeon Kim Chang-Duck Jun Jeanho Yun Sun Choi hyun-Woo Rh.e Kwang-h.eon Liu Jung Weon lee Department of Pharmacy College of PharmacySeoul National UniversitySeoulRepublic of Korea Research Institute of Pharmaceutical Sciences College of PharmacySeoul National UniversitySeoulRepublic of Korea BK21 FOUR Community-Based Intelligent Novel Drug Discovery education Unit College of Pharmacy and Research Institute of Pharmaceutical SciencesKyungpook National UniversityDaeguRepublic of Korea Department of Chemistry Seoul National UniversitySeoulRepublic of Korea College of Pharmacy Chung-Ang UniversitySeoulRepublic of Korea Natural Product Informatics Research Center Korea Institute of Science and Technology(KIST)Gangneung-siGangwon-doRepublic of Korea School of Life Sciences Gwangju Institute of Science and Technology(GIST)GwangjuRepublic of Korea Department of Biochemistry College of MedicineDong-A UniversityBusanRepublic of Korea Global AI Drug Discovery Center College of Pharmacy and Graduate School of Pharmaceutical SciencesEwha Womans UniversitySeoulRepublic of Korea Interdisciplinary Program in Genetic engineering Seoul National UniversitySeoulRepublic of Korea

Background:Transmembrane 4 L six family member 5(TM4SF5)translocates subcellularly and functions metabolically,although it is unclear how intracellu-lar TM4SF5 translocation is linked to metabolic *** is thus of interests to understand how the traffic dynamics of TM4SF5 to subcellular endosomal membranes are correlated to regulatory roles of ***:here,we explored the metabolic significance of TM4SF5 localization at mitochondria-lysosome contact sites(MLCSs),using in vitro cells and in vivo animal systems,via approaches by immunofluorescence,proximity labelling based proteomics analysis,organelle reconstitution ***:Upon extracellular glucose repletion following depletion,TM4SF5 became enriched at MLCSs via an interaction between mitochondrial FK506-binding protein 8(FKBP8)and lysosomal *** labeling showed molecular clustering of phospho-dynamic-related protein I(DRP1)and certain mitophagy receptors at TM4SF5-enriched MLCSs,leading to mitochondrial fis-sion and ***4SF5 bound NPC intracellular cholesterol transporter 1(NPC1)and free cholesterol,and mediated export of lysosomal cholesterol to mitochondria,leading to impaired oxidative phosphorylation but intact tri-carboxylic acid(TCA)cycle andβ-*** mouse models,hepatocyte Tm4sf5 promoted mitophagy and cholesterol transport to mitochondria,both with positive relations to liver ***:Our findings suggested that TM4SF5-enriched MLCSs regu-late glucose catabolism by facilitating cholesterol export for mitochondrial reprogramming,presumably while hepatocellular carcinogenesis,recapitulating aspects for hepatocellular carcinoma metabolism with mitochondrial repro-gramming to support biomolecule synthesis in addition to glycolytic energetics.

关键词： cholesterol fluorescent imaging glucose catabolism hepatocellular carcinogenesis mem-brane contact sites mitochondria function mitophagy oxidative phosphorylation protein-protein interaction tetraspanin

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Adaptive electrospinning System Based on Reinforcement Learning for Uniform‑Thickness Nanofiber Air Filters

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Advanced Fiber Materials 2023年第2期5卷 617-631页

作者： Seok h.eon hwang Jin Yeong Song hyun Il Ryu jae h.e oh.seungwook lee Donggeun lee Dong Yong Park Sang Min Park School of Mechanical engineering Pusan National University63‑2 Busan University‑roGeumjeong‑guBusan 46241South Korea Smart Manufacturing Technology R&D Group Korea Institute of Industrial Technology320 Techno Sunhwan‑roYuga‑eupDalseong‑gunDaegu 42994Republic of Korea

electrospinning is a simple and versatile method to produce nanofiber ***,owing to bending instability that occurs during the electrospinning process,electrospinning has frequently produced a non-uniform-thickness nanofiber filter,which deteriorates its air ***,an adaptive electrospinning system based on reinforcement learning(e-RL)was developed to produce uniform-thickness nanofiber *** e-RL accomplished a real-time thickness measurement of an electrospun nanofiber filter by measuring the transmitted light through the nanofiber filter using a camera placed at the bottom of the collector and converting it into thickness using the Beer–Lambert *** on the measured thickness,the e-RL detected the non-uniformity of the nanofiber filter thickness and manipulated the movable collector to alleviate the non-uniformity of the thickness by a pre-trained reinforcement learning(RL)*** the training of the RL algo-rithm,the nanofiber production simulation software based on the empirical model of the deposition of the nanofiber filter was developed,and the training process of the RL algorithm was repeated until the optimal policy was *** the training process with the simulation software,the trained model was transferred to the adaptive electrospinning *** the movement of the collector under the optimal strategy of RL algorithm,the non-uniformity of such nanofiber filters was significantly reduced by approximately five times in standard deviation and error for both simulation and *** finding has great potential in improving the reliability of electrospinning process and nanofiber filters used in research and industrial fields such as environment,energy,and biomedicine.

关键词： electrospinning Nanofiber filter Uniform thickness Reinforcement learning Deep Q-network

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Unveiling the role of Ni in Ru-Ni oxide for oxygen evolution: Lattice oxygen participation enhanced by structural distortion

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Journal of energy Chemistry 2023年第2期77卷 54-61,I0003页

作者： Young-Jin Ko Man ho han Chulwan Lim Seung-ho Yu Chang hyuck Choi Byoung Koun Min jae-Young Choi Woong h.e lee hyung-Suk oh Clean energy Research Center Korea Institute of Science and Technology(KIST)Hwarang-ro 14-gil 5Seongbuk-guSeoul 02792Republic of Korea Department of Chemical and Biological engineering Korea University145Anam-roSeongbuk-guSeoul 02841Republic of Korea Department of Chemistry Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea National Agenda Research Division Korea Institute of Science and Technology(KIST)Hwarang-ro 14-gil 5Seonbuk-guSeoul 02792Republic of Korea Graduate School of energy and environment(KU-KIST Green School) Korea University145 Anam-roSeongbuk-guSeoul 02841Republic of Korea School of Advanced Materials Science&engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea KIST-SKKU Carbon-Neutral Research Center Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea

Introducing Ni in Ru oxide is a promising approach to enhance the catalytic activity for the oxygen evolution reaction(OeR).however,the role of Ni(which has a poor intrinsic activity)is not fully ***,a Ru NiO_(x)electrode fabricated via a modified dip coating method exhibited excellent OeR performance in acidic media,and neutral media for CO_(2)reduction *** combined in-situ/operando X-ray absorption near-edge structure and on-line inductively coupled plasma mass spectrometry studies to unveil the role of the Ni introduced in the Ru *** propose that the Ni not only transforms the electronic structure of the Ru oxide,but also produces a large number of oxygen vacancies by distorting the oxygen lattice structure at low overpotentials,increasing the participation of lattice oxygen for *** work demonstrates the real behavior of bimetallic oxide materials under applied potentials and provides new insights into the development of efficient electrocatalysts.

关键词： Oxygen evolution reaction Ru electrode Ni electrode Oxygen vacancies In-situ/Operando studies

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Randomized controlled trial to evaluate the efficacy and safety of fexuprazan compared with.esomeprazole in erosive esophagitis

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World Journal of Gastroenterology 2022年第44期28卷 6294-6309页

作者： Kang Nyeong lee oh Young lee hoon Jai Chun Jin Il Kim Sung Kook Kim Sang Woo lee Kyung Sik Park Kook Lae lee Suck Chei Choi jae-Young Jang Gwang ha Kim In-kyung Sung Moo In Park Joong Goo Kwon Nayoung Kim jae Jun Kim Soo Teik lee hyun Soo Kim Ki Bae Kim Yong Chan lee Myung-Gyu Choi Joon Seong lee hwoon-Yong Jung Kwang jae lee Jie-hyun Kim hyunsoo Chung Department of Internal Medicine Hanyang University College of MedicineSeoul 04763South Korea Department of Internal Medicine Korea University Anam HospitalSeoul 02841South Korea Department of Internal Medicine The Catholic University of KoreaYeouido ST.Mary’s HospitalSeoul 07260South Korea Department of Internal Medicine Kyungpook National University HospitalDaegu 41944South Korea Department of Internal Medicine Korea University Ansan HospitalAnsan-si 15355South Korea Department of Internal Medicine Keimyung University Dongsan HospitalDaegu 42601South Korea Department of Internal Medicine Seoul Metropolitan Government Seoul National University Boramae Medical CenterSeoul 07061South Korea Department of Internal Medicine Wonkwang University HospitalIksan 54538South Korea Department of Internal Medicine KyungHee University Medical CenterSeoul 02447South Korea Department of Internal Medicine Pusan National University School of Medicine and Biomedical Research InstitutePusan National University HospitalBusan 47241South Korea Department of Internal Medicine KKonkuk University Medical CenterSeoul 05030South Korea Department of Internal Medicine Kosin University Gaspel HospitalBusan 49267South Korea Department of Internal Medicine Daegu Catholic University Medical CenterDaegu 42471South Korea Department of Internal Medicine Seoul National University Bundang HospitalSeongnam-si 13620Gyeonggi-doSouth Korea Department of Internal Medicine Samsung Medical CenterSeoul 06351South Korea Department of Internal Medicine Chonbuk National University HospitalJeonju-si 54907South Korea Department of Internal Medicine Chonnam National University HospitalGwangju 61469South Korea Department of Internal medicine Chungbuk National University School of MedicineCheong Ju 28644South Korea Department of Internal Medicine Severance HospitalSeoul 03722South Korea Department of Internal Medicine The Catholic University of KoreaSeoul ST.Mary’s HospitalSeoul 06591South Korea Digestive Disease Center Soon

BACKGROUND Fexuprazan,a novel potassium-competitive acid blocker,reversibly suppresses the K+/h+-ATPase enzyme in proton pumps within gastric parietal ***’s suppression of gastric acid was maintained in healthy individuals for 24 h in a dose-dependent *** To compare fexuprazan to esomeprazole and establish its efficacy and safety in patients with.erosive esophagitis(ee).MeThODS Korean adult patients with.endoscopically confirmed ee were randomized 1:1 to receive fexuprazan 40 mg or esomeprazole 40 mg once daily for eight *** primary endpoint was the proportion of patients with healed ee confirmed by endoscopy at week *** secondary endpoints included the healing rate of ee at week 4,symptom response,and quality of life *** profiles and serum gastrin levels were compared between the *** Of the 263 randomized,218 completed the study per protocol(fexuprazan 40 mg,n=107;esomeprazole 40 mg,n=111).Fexuprazan was non-inferior to esomeprazole regarding the healing rate at week 8[99.1%(106/107)vs 99.1%(110/111)].There were no between-group differences in the ee healing rate at week 4[90.3%(93/103)vs 88.5%(92/104)],symptom responses,and quality of life ***,serum gastrin levels at weeks 4 and 8 and drug-related side effects did not significantly differ between the *** Fexuprazan 40 mg is non-inferior to esomeprazole 40 mg in ee healing at week *** suggest that fexuprazan is an alternative promising treatment option to PPIs for patients with.ee.

关键词： Gastroesophageal reflux esophagitis Proton pump inhibitors heartburn Quality of life

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Colors of vegetables and fruits and the risks of colorectal cancer

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World Journal of Gastroenterology 2017年第14期23卷 2527-2538页

作者： Jeeyoo lee Aesun Shin jae hwan oh Jeongseon Kim Department of Preventive Medicine Seoul National University College of Medicine Center for Colorectal Cancer National Cancer Center Molecular epidemiology Branch Division of Cancer Epidemiology and PreventionResearch InstituteNational Cancer Center

AIM To investigate the relationship between the colors of vegetables and fruits and the risk of colorectal cancer in *** A case-control study was conducted with 923 colorectal cancer patients and 1846 controls recruited from the National Cancer Center in Korea. We classified vegetables and fruits into four groups according to the color of their edible parts(e.g., green, orange/yellow, red/purple and white). Vegetable and fruit intake level was classified by sex-specific tertile of the control group. Logistic regression models were used for estimating the odds ratios(OR) and their 95% confidence intervals(CI).ReSULTS high total intake of vegetables and fruits was strongly associated with a reduced risk of colorectal cancer in women(OR = 0.32, 95%CI: 0.21-0.48 for highest vs lowest tertile) and a similar inverse association was observed for men(OR = 0.60, 95%CI: 0.45-0.79). In the analysis of color groups, adjusted ORs(95%CI) comparing the highest to the lowest of the vegetables and fruits intake were 0.49(0.36-0.65) for green, and 0.47(0.35-0.63) for white vegetables and fruits in men. An inverse association was also found in women for green, red/purple and white vegetables and fruits. however, in men, orange/yellow vegetables and fruits(citrus fruits, carrot, pumpkin, peach, persimmon, ginger) intake was linked to an increased risk of colorectal cancer(OR = 1.61, 95%CI: 1.22-2.12).CONCLUSION Vegetables and fruits intake from various color groups may protect against colorectal cancer.

关键词：蔬菜和水果 Colorectal 癌症朝鲜

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What Causes the Springtime Tropospheric Ozone Maximum over Northeast Asia?

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Advances in Atmospheric Sciences 2010年第3期27卷 543-551页

作者： jae h.KIM hyunjin lee Department of Atmospheric Science Pusan National University

Scientists have long debated the relative importance of tropospheric photochemical production versus stratospheric influx as causes of the springtime tropospheric ozone maximum over northern mid-latitudes. This paper investigates whether or not stratospheric intrusion and photochemistry play a significant role in the springtime ozone maximum over Northeast Asia, where ozone measurements are sparse. We examine how tropospheric ozone seasonalities over Naha （26°N, 128°e）, Kagoshima （31°N, 131°e）, and Pohang （36°N, 129°e）, which are located on the same meridional line, are related to the timing and location of the jet stream. The ozone seasonality shows a gradual increase from January to the maximum ozone month, which corresponds to April at Naha, May at Kagoshima, and June at Pohang. In order to examine the occurrence of stratospheric intrusion, we analyze a correlation between jet stream activity and tropospheric ozone seasonality. From these analyses, we did not find any favorable evidence supporting the hypothesis that the springtime enhancement may result from stratospheric intrusion. According to trajectory analysis for vertical and horizontal origins of the airmass, a gradual increasing tendency in ozone amounts from January until the onset of monsoon was similar to the increasing ozone formation tendency from winter to spring over China's Mainland, which has been observed during the build-up of tropospheric ozone over Central europe in the winter-spring transition period due to photochemistry. Overall, the analyses suggest that photochemistry is the most important contributor to observed ozone seasonality over Northeast Asia.

关键词： tropospheric ozone photochemistry, stratospheric intrusion, jet stream activity, trajectory

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Development of a simple model for batch and boundary information updation for a similar ship's block model

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Science China(Information Sciences) 2012年第5期55卷 1019-1031页

作者： lee h.eon-deok SON Myeong-jo oh Min-jae lee hyung-woo KIM Tae-wan Daewoo Shipbuilding & Marine engineering Co. LTD.Geoje 656-714South Korea Department of Naval Architecture and Ocean engineering Seoul National UniversitySeoul 151-744South Korea Research Institute of Marine Systems engineering Seoul National UniversitySeoul 151-744South Korea

In early 2000,large domestic shipyards introduced shipbuilding 3D computer-aided design (CAD) to the hull production design process to define manufacturing and assembly *** production design process accounts for most of the man-hours (M/h) of the entire design process and is closely connected to yard production because designs must take into account the production schedule of the shipyard,the current state of the dock needed to mount the ship’s block,and supply ***,many shipyards are investigating the complete automation of the production design process to reduce the M/h for ***,these problems are still currently unresolved,and a clear direction is needed for research on the automatic design base of manufacturing rules,batches reflecting changed building specifications,batch updates of boundary information for hull members,and management of the hull model change history to automate the production design *** this study,a process was developed to aid production design engineers in designing a new ship’s hull block model from that of a similar ship previously built,based on AVeVA *** automation system that uses the similar ship’s hull block model is proposed to reduce M/h and human errors by the production design ***,scheme files holding important information were constructed in a database to automatically update hull block model ***,for batch updates,the database’s table,including building specifications and the referential integrity of a relational database were *** particular,this study focused on reflecting the frequent modification of building specifications and regeneration of boundary information of the adjacent panel due to changes in a specific ***,the rollback function is proposed in which the database (DB) is used to return to the previously designed panels.

关键词： ship design production design model reuse model history management referential integrity scheme file

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