检索结果-南通市图书馆

Leader-following consensus criteria for multi-agent systems with time-varying delays and switching interconnection topologies

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 Physics B 2012年第11期21卷 144-153页

作者： M.J.Park O.M.kwon ju.H.Park S.M.Lee E.J.Cha School of Electrical Engineering Chungbuk National University Department of Electrical Engineering Yeungnam University School of Electronic Engineering Daegu University Department of Biomedical Engineering School of MedicineChungbuk National University

We consider multi-agent systems with time-varying delays and switching interconnection topologies. By con- structing a suitable Lyapunov-Krasovskii functional and using the reciprocally convex approach, new delay-dependent consensus criteria for the systems are established in terms of linear matrix inequalities （LMIs）, which can be easily solved by using various effective optimization algorithms. Two numerical examples are given to illustrate the effectiveness of the proposed methods.

关键词： consensus multi-agent systems time delay Lyapunov method

Synchronization criteria for coupled Hopfield neural networks with time-varying delays

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2011年第11期20卷 140-150页

This paper proposes new delay-dependent synchronization criteria for coupled Hopfield neural networks with time-varying delays. By construction of a suitable Lyapunov Krasovskii＇s functional and use of Finsler＇s lemma, novel synchronization criteria for the networks are established in terms of linear matrix inequalities （LMIs） which can be easily solved by various effective optimization algorithms. Two numerical examples are given to illustrate the effectiveness of the proposed methods.

关键词： Hopfield neural networks coupling delay synchronization Lyapunov method

Successful recanalization of acute superior mesenteric artery thrombotic occlusion with primary aspiration thrombectomy

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2010年第32期16卷 4112-4114页

作者： Hye Jin Yang Young kwon Cho Yun ju.Jo Yoon Young ju.g Seung A Choi Suk Hoon Lee Department of Radiology Eulji General HospitalEulji UniversitySeoul 139-711South Korea Department of Internal Medicine Eulji General HospitalEulji UniversitySeoul 139-711South Korea

Prompt revascularization of the superior mesenteric artery(SMA) thrombotic occlusion can prevent intestinal infarction and decrease necrosis of the bowel ***,we describe two cases who underwent successful endovascular recanalization for acute SMA thrombosis using a primary aspiration thrombectomy because of possible consequent laparotomy for survey of bowel *** two patients had dramatic pain reliefimmediately after the procedure and remained symptomfree during the follow-up period.

关键词： Superior mesenteric artery Thrombosis Aspiration thrombectomy

Neuromorphic devices based on fluorite-structured ferroelectrics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

InfoMat 2022年第12期4卷 1-32页

作者： Dong Hyun Lee Geun Hyeong Park Se Hyun Kim ju.Yong Park Kun Yang Stefan Slesazeck Thomas Mikolajick Min hyuk Park Department of Materials Science and Engineering&Inter-University Semiconductor Research Center College of EngineeringSeoul National UniversitySeoulRepublic of Korea Research Institute of Advanced Materials Seoul National UniversitySeoulRepublic of Korea NaMLab gGmbH DresdenGermany Institute of Engineering Research Seoul National UniversitySeoulRepublic of Korea

A continuous exponential rise has been observed in the storage and processing of the data that may not curtail in the foreseeable *** required data processing speed and power consumption are restricted by the buses between the logic and memory devices that are characteristic of the von Neumann computing ***-mimicking neuromorphic computing has garnered considerable academic and industrial interest to resolve these ***,devices based on emerging nonvolatile memories capable of mimicking the behaviors of synapses and neurons,which are the main elements in biological computing systems(brains),are attracting significant interest from the device *** the discovery of ferroelectricity in fluorite-structured oxides,such as HfO2 and ZrO2,which are compatible with the state-of-the-art complementary-metal-oxide-semiconductor processes,ferroelectric devices have rapidly evolved as the main direction of these research and development *** science related to fluorite-structured ferroelectrics has been intensively studied over the last *** present,the focus is gradually moving to practical applications,including neuromorphic computing and advanced classical processing or memory units in the conventional von Neumann ***,despite its rapid development,the wealth of recent progress in neuromorphic computing devices based on fluorite-structured ferroelectrics has not been reviewed and *** progress report comprehensively reviews and systemizes the recent progress in artificial synaptic and spiking neuron devices for neuromorphic computing based on fluorite-structured ferroelectrics.

关键词： ferroelectrics hafnia neuromorphic computing semiconductor devices

Natural Variation in OsPRR37 Regulates Heading Date and Contributes to Rice Cultivation at a Wide Range of Latitudes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2013年第6期6卷 1877-1888页

作者： Bon-hyuk Koo Soo-Cheul Yoo Joon-Woo Park Choon-Tak kwon Byoung-Doo Lee Gynheung An Zhanying Zhang linjie Li Zichao Li Nam-Chon Paek Department of Plant Science Plant Genomics and Breeding Institute and Research Institute for Agriculture and Life Sciences Seoul National UniversitySeoul 151-921 Korea Department of Plant Systems Biotech and Crop Biotech Institute Kyung Hee University Yongin 446-701 Korea Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic Improvement China Agriculture UniversityBeijing 100193 China Institute of Green Bio Science and Technology Seoul National University Pyeongchang 232-916 Korea

Heading date and photoperiod sensitivity are fundamental traits that determine rice adaptation to a wide range of geographic environments. By quantitative trait locus （QTL） mapping and candidate gene analysis using whole- genome re-sequencing, we found that Oryza sativa Pseudo-Response Regulator37 （OsPRR37; hereafter PRR37） is respon- sible for the Early heading7-2 （EH7-2）/Heading date2 （Hd2） QTL which was identified from a cross of late-heading rice ＇Milyang23 （M23）＇ and early-heading rice ＇H143＇. H143 contains a missense mutation of an invariantly conserved amino acid in the CCT （CONSTANS, CO-like, and TOC1） domain of PRR37 protein. In the world rice collection, different types of nonfunctional PRR37 alleles were found in many European and Asian rice cultivars. Notably, the japonica varieties harboring nonfunctional alleles of both Ghd7/Hd4 and PRR37/Hd2 flower extremely early under natural long-day condi- tions, and are adapted to the northernmost regions of rice cultivation, up to 53~ N latitude. Genetic analysis revealed that the effects of PRR37 and Ghd7 alleles on heading date are additive, and PRR37 down-regulates Hd3a expression to suppress flowering under long-day conditions. Our results demonstrate that natural variations in PRR37/Hd2 and GhdT/ Hd4 have contributed to the expansion of rice cultivation to temperate and cooler regions.

关键词： rice heading date quantitative trait locus natural variation Ghd7 OsPRR37.

Nontarget screening using passive air and water sampling with a level Ⅱ fugacity model to identify unregulated environmental contaminants

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 2017年第12期29卷 84-91页

作者： In-Young Chung Yu-Mi Park Hyun-Jeoung Lee hyuk Kim Dong-Hoon Kim Il-Gyu Kim Sang-Min Kim Young-Sun Do Kwang-Seol Seok ju.g-Hwan kwon Chemical Research Division Environmental Health Research Department National Institute of Environmental ResearchIncheon Division of Environmental Science and Ecological Engineering Korea University

It is thought that there are many unregulated anthropogenic chemicals in the *** risk assessment of chemicals, it is essential to estimate the predicted environmental concentrations. As an effort of identifying residual organic contaminants in air and water in Korea, nontarget screening using two-dimensional gas chromatography time-of-flight mass spectrometry（GC × GC-TOFMS） was conducted at 10 sites using polyurethane foam passive air sampler and at 6 sites using polydimethyl siloxane（PDMS） passive water sampler in three different seasons in 2014. More than 600 chemical peaks were identified satisfying the identification criteria in air and water samples, respectively, providing a list for further investigation. Chemical substances with reported national emission rates in2014（n = 149） were also screened for potential existence in the environment using a level Ⅱ fugacity model. Most of chemical substances classified as not detectable were not identified with detection frequency greater than 20% by nontarget screening, indicating that a simple equilibrium model has a strong potential to be used to exclude chemicals that are not likely to remain in the environment after emissions from targeted monitoring.

关键词： Nontarget screening GC × GC-TOFMS Passive sampling Pollutant release and transfer register(PRTR) Fugacity model

Highly impermeable and flexible silica encapsulation films synthesized by sol-gel process

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第8期15卷 7476-7483页

作者： Si-Hoon Kim Gyeong-Seok Hwang Donghwan Koo Dong-Hyun Seo Ye-Pil kwon Hansuek Lee Hyesung Park Eun-chae Jeon ju.Young Kim School of Materials Science and Engineering University of UlsanTechno saneop-ro 55beon-gil 12Ulsan 44776Republic of Korea Department of Materials Science and Engineering Ulsan National Institute of Science and Technology(UNIST)UNIST-gil 50Ulsan 44919Republic of Korea Department of Physics Korea Advanced Institute of Science and Technology(KAIST)Daehak-ro 291Deajeon 34141Republic of Korea Graduate School of Semiconductor Materials and Devices Ulsan National Institute of Science and Technology(UNIST)UNIST-gil 50Ulsan 44919Republic of Korea

Silica thin films synthesized sol–gel process are proposed as flexible encapsulation materials.A sol–gel process provides a dense and stable amorphous silica structure,yielding an extremely high elastic deformation limit of 4.9%and extremely low water vapor transmission rate(WVTR)of 2.90×10^(−4)g/(m^(2)∙day)at 60℃and relative humidity of 85%.The WVTR is not degraded by cyclic bending deformations for the bending radius corresponding to a tensile strain of 3.3%in the silica encapsulation film,implying that the silica thin film is robust against the formation of pinhole-type defects by cyclic bending *** organic solar cells encapsulated with the silica films operate without degradation in power conversion efficiency for 50,000 bending cycles for a bending radius of 6 mm.

关键词： silica thin film sol-gel flexible encapsulation mechanical reliability flexible organic solar cell

Immunomodulatory nanodiamond aggregate-based platform for the treatment of rheumatoid arthritis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Regenerative Biomaterials 2019年第3期6卷 163-174页

作者： Amanda Pentecost Min ju.Kim Sangmin Jeon Young Ji Ko Ick Chan kwon Yury Gogotsi Kwangmeyung Kim Kara L.Spiller Department of Materials Science and Engineering College of EngineeringDrexel UniversityPhiladelphiaPAUSA School of Biomedical Engineering Scienceand Health SystemsDrexel UniversityPhiladelphiaPAUSA KU-KIST Graduate School of Converging Science and Technology Korea UniversitySeoulSouth Korea Biomedical Research Institute Center for TheragnosisKorea Institute of Science and TechnologySeoulSouth Korea

We previously demonstrated that octadecylamine-functionalized nanodiamond(ND-ODA)and dexamethasone(Dex)-adsorbed ND-ODA(ND-ODA–Dex)promoted anti-inflammatory and proregenerative behavior in human macrophages in *** this study,we performed a pilot study to investigate if these immunomodulatory effects translate when used as a treatment for rheumatoid arthritis in *** local injection in limbs of mice with collagen type II-induced arthritis,microcomputed tomography showed that mice treated with a low dose of ND-ODA and ND-ODA–Dex did not experience bone loss to the levels observed in non-treated arthritic controls.A low dose of ND-ODA and ND-ODA–Dex also reduced macrophage infiltration and expression of proinflammatory mediators iNOS and tumor necrosis factor-a compared to the arthritic control,while a high dose of ND-ODA increased expression of these ***,these results suggest that ND-ODA may be useful as an inherently immunomodulatory platform,and support the need for an in-depth study,especially with respect to the effects of dose.

关键词： drug delivery nanobiomaterials biomaterial–cell interaction

H∞ synchronization of chaotic neural networks with time-varying delays

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 Physics B 2013年第11期22卷 244-252页

作者： O. M. kwon M. J. Park ju.H. Park S. M. Lee E. J. Cha School of Electrical Engineering Chungbuk National University Department of Electrical Engineering Yeungnam University School of Electronic Engineering Daegu University Department of Biomedical Engineering School of Medicine Chungbuk National University

In this paper, we investigate the problem of H∞ synchronization for chaotic neural networks with time-varying delays. A new model of the networks with disturbances in both master and slave systems is presented. By constructing a suitable Lyapunov–Krasovskii functional and using a reciprocally convex approach, a novel H∞ synchronization criterion for the networks concerned is established in terms of linear matrix inequalities （LMIs） which can be easily solved by various effective optimization algorithms. Two numerical examples are given to illustrate the effectiveness of the proposed method.

关键词： chaotic neural networks time-varying delays H∞ synchronization Lyapunov method