检索结果-南通市图书馆

Advances in Atmospheric Sciences 2015年第9期32卷 1217-1230页

作者： Bo-Young YE Gyu Won LEE hong-mok park Department of Astronomy and Atmospheric Sciences Research and Training Team for Future Creative Astrophysicists and CosmologistsKyungpook National University Center for Atmospheric REmote sensing(CARE) Kyungpook National University

A major issue in radar quantitative precipitation estimation is the contamination of radar echoes by non-meteorological targets such as ground clutter,chaff,clear air echoes *** this study,a fuzzy logic algorithm for the identification of non-meteorological echoes is developed using optimized membership functions and weights for the dual-polarization radar located at Mount *** selected precipitation and non-meteorological events,the characteristics of the precipitation and non-meteorological echo are derived by the probability density functions of five fuzzy parameters as functions of reflectivity *** membership functions and weights are then determined by these density ***,the nonmeteorological echoes are identified by combining the membership functions and *** performance is qualitatively evaluated by long-term rain *** detection accuracy of the fuzzy logic algorithm is calculated using the probability of detection（POD）,false alarm rate（FAR）,and clutter–signal ratio（CSR）.In addition,the issues in using filtered dual-polarization data are alleviated.

关键词： dual-polarization radar non-meteorological echo quality control fuzzy logic algorithm

Classification of Precipitation Types Using Fall Velocity–Diameter Relationships from 2D-Video Distrometer Measurements

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2015年第9期32卷 1277-1290页

作者： Jeong-Eun LEE Sung-Hwa JUNG hong-mok park Soohyun KWON Pay-Liam LIN Gyu Won LEE Department of Astronomy and Atmospheric Sciences Research and Training Team for Future Creative Astrophysicists and CosmologistsKyungpook National University Center for Atmospheric Remote Sensing Kyungpook National University Departmentof Atmospheric Sciences NCUTaipei

Fall velocity–diameter relationships for four different snowflake types（dendrite,plate,needle,and graupel） were investigated in northeastern South Korea,and a new algorithm for classifying hydrometeors is proposed for distrometric measurements based on the new *** ice crystals（approximately 40 000 particles） were measured with a two-dimensional video disdrometer（2DVD） during a winter experiment from 15 January to 9 April *** fall velocity–diameter relationships were derived for the four types of snowflakes based on manual classification by experts using snow photos and 2DVD measurements：the coefficients（exponents） for different snowflake types were 0.82（0.24） for dendrite,0.74（0.35） for plate,1.03（0.71） for needle,and 1.30（0.94） for graupel,*** new relationships established in the present study（PS） were compared with those from two previous *** types were classified with the derived fall velocity–diameter relationships,and the classification algorithm was evaluated using 3 × 3 contingency tables for one rain–snow transition event and three snowfall *** algorithm showed good performance for the transition event：the critical success indices（CSIs） were 0.89,0.61 and 0.71 for snow,wet-snow and rain,*** snow events,the algorithm performance for dendrite and plate（CSIs = 1.0 and 1.0,respectively） was better than for needle and graupel（CSIs = 0.67 and 0.50,respectively）.

关键词： snowflake types wet snow fall velocity–diameter hydrometeor type classification 2DVD

Prominent cycling reversibility and kinetics enabled by CaTiO3 protective layer on Zn metal for aqueous Zn-ion batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 245-258页

作者： Gaeun Lee Yong Nam Ahn Seongjoon So Chanwoo park Jong-Seong Bae Taehyun park Il Tae Kim Jaehyun Hur School of Chemical Biological and Battery Engineering Gachon University Seongnam Busan Center Korea Basic Science Institute

Aqueous Zn-ion batteries （AZIBs） have received considerable attention owing to their various advantages such as safety,low cost,simple battery assembly conditions,and high ionic ***,they still suffer from serious problems,including uncontrollable dendrite growth,corrosion,hydrogen evolution reaction （HER） from water decomposition,electrode passivation,and unexpected *** creation of a uniform artificial nanocrystal layer on the Zn anode surface is a promising strategy for resolving these ***,we propose the use of a perovskite CaTiO3（CTO） protective layer on Zn（CTO@Zn） as a promising approach for improving the performance of *** CTO artificial layer provides an efficient pathway for Zn ion diffusion towards the Zn metal because of the high dielectric constant （εr=180） and ferroelectric characteristics that enable the alignment of dipole moments and redistribute the Zn2+ions in the CTO *** avoiding the direct contact of the Zn anode with the electrolyte solution,the uneven dendrite growth,corrosion,parasitic side reactions,and HER are mitigated,while CTO retains its mechanical and chemical robustness during ***,CTO@Zn demonstrates an improved lifespan in a symmetric cell configuration compared with bare ***@Zn shows steady overpotential （～68 m V） for 1500 h at 1 mA cm-2/0.5 mA h cm-2,excelling bare ***,when paired with the V2O5-C cathode,the CTO@Zn//V2O5-C full battery delivers 148.4 mA h g-1（based on the mass of the cathode） after 300 *** study provides new insights into Zn metal anodes and the development of high-performance AZIBs.

关键词： Artificial layer Dielectric constant Zn metal anode Zinc aqueous battery

Enhanced charge separation by interchain hole delocalization in nonfullerene acceptor-based bulk heterojunction materials

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Carbon Energy 2023年第7期5卷 27-37页

作者： Chang-mok Oh Sujung park Jihoon Lee Sung Heum park Shinuk Cho In-Wook Hwang Advanced Photonics Research Institute Gwangju Institute of Science and TechnologyGwangjuRepublic of Korea Department of Physics and Energy Harvest Storage Research Center University of UlsanUlsanRepublic of Korea Department of Physics Pukyong National UniversityBusanRepublic of Korea

Bulk heterojunction(BHJ)composites show improved power conversion efficiencies when optimized in terms of morphology using various film processing methods.A reduced carrier recombination loss in an optimized BHJ was characterized ***,the driving force that leads to this reduction was not clearly *** this study,we focus on the decreased carrier recombination loss and its driving force in optimized nonfullerene acceptor-based PTB7-Th:IEICO-4F BHJ *** demonstrate that the optimized BHJ shows deactivation in the sub-nanosecond nongeminate carrier recombination *** driving force for this deactivation was determined to be the improved interchain hole delocalization between the *** enhanced interchain hole delocalization was observed using steady-state photoinduced absorption(PIA)*** particular,increased splitting between the polaron PIA bands was ***,improved interchain hole delocalization was observed for other state-of-the-art BHJ materials,including D18:Y6 with optimized morphologies.

关键词： bulk heterojunction interchain hole delocalization nonfullerene acceptor photoinduced absorption spectroscopy solar cell

Versatile control of concentration gradients in non-fullerene acceptor-based bulk heterojunction films using solvent rinse treatments

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2022年第5期7卷 1102-1110页

作者： Chang-mok Oh Soyeong Jang Jihoon Lee Sung Heum park In-Wook Hwang Advanced Photonics Research Institute Gwangju Institute of Science and TechnologyGwangju61005Republic of Korea Department of Physics Pukyong National UniversityBusan48513Republic of Korea

Solvent rinse treatments using polar methanol(Me OH)and nonpolar n-hexane have been developed for controlling material concentration gradients along the longitudinal direction of non-fullerene acceptor-based bulk heterojunction(BHJ)films comprised of electron donor polymer,PBDB-T and acceptor,*** the used solvents(chlorobenzene with 1 vol%DIO)were completely evaporated,ITIC-m rich domains were formed at the top surface of the BHJ films after they were rinsed with Me OH,as evidenced by water contact angle,atomic force microscopy,time-of-flight secondary ion mass spectroscopy,which led to enhanced electron transport in the conventional structure of organic solar cells(OSCs).In contrast,after rinsing with n-hexane,ITIC-m rich domains were formed at the bottom surface of the films,which improved electron transport in the inverted structure *** enhanced carrier transports increased the PCEs(11.80%and 11.15%)in both conventional and inverted OSCs by 10.29%and 10.35%compared with control *** versatile control of material concentration gradients is determined to be feasible owing to the chemical interaction of the used substrates(glass,PEDOT:PSS,and Zn O)and rinsing solvents.

关键词： films treatment heterojunction

Complete resection of large-cell neuroendocrine and hepatocellular carcinoma of the liver: A case report

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 8277-8283页

作者： Byeong Gwan Noh Hyung-Il Seo Young mok park Suk Kim Seung Baek hong So Jeong Lee Division of HBP Surgery and Transplantation Department of SurgeryPusan National University School of MedicineBiomedical Research InstitutePusan National University HospitalBusan 49241South Korea Department of Radiology Pusan National University School of MedicineBiomedical Research InstitutePusan National University HospitalBusan 49241South Korea Department of Pathology Pusan National University School of MedicineBiomedical Research InstitutePusan National University HospitalBusan 49241South Korea

BACKGROUND Combined tumors comprising large-cell neuroendocrine carcinoma and hepatocellular carcinoma have been rarely reported in the *** SUMMARY We report a case of a 73-year-old woman with chronic hepatitis B suspected to have a malignant hepatic mass(segment 3;size,4.5 cm)and lymph node metastasis based on computed tomography and magnetic resonance *** being Child-Pugh class A,esophageal varices were *** underwent left lateral sectionectomy and lymph node *** examination revealed a collision tumor consisting of large-cell neuroendocrine(90%)and hepatocellular(10%)*** combined carcinoma had metastasized to one of the three lymph nodes *** patient recovered without any postoperative complications and was discharged in good condition on postoperative day *** chemotherapy was not *** recurrence occurred during a follow-up period of 24 *** To improve the therapeutic management of combined tumors in the liver,it is necessary to discuss each clinical experience and consider an appropriate method for the preoperative diagnosis and treatment.

关键词： Hepatocellular carcinoma Neuroendocrine carcinoma Chronic hepatitis B Case report

Bimodal grain structures and tensile properties of a biomedical Co-20Cr-15W-10Ni alloy with different pre-strains

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2021年第1期40卷 20-30页

作者： Cheng-Lin Li Seong-Woo Choi Jeong mok Oh Jae-Keun hong Jong-Taek Yeom Joo-Hee Kang Qing-Song Mei Chan Hee park Department of Materials Engineering School of Power and Mechanical EngineeringWuhan UniversityWuhan 430072China Advanced Metals Division.Korea Institute of Materials Science Changwon 51508Republic of Korea Materials Testing&Reliability Division Korea Institute of Materials ScienceChangwon 51508Republic of Korea

The influence of pre-strain on the formation of bimodal grain structures and tensile properties of a Co-20 Cr-15 W-10 Ni alloy was *** bimodal grain structures consist of fine grains(FGs;2-3μm in diameter)and coarse grains(CGs;8-16μm in diameter),which can be manipulated by changing the pre-strain(ε=0.3-0.7)and annealing temperatures(1000-1100℃).High pre-strain applied in the samples can intensify the plasticity heterogeneity through increasing the total dislocation density and the local volumes of high-density *** can essentially result in finer FGs,a higher FG volume fraction,and overall grain refinement in the samples after ***-temperature essentially increases both the size and volume fraction of CGs,leading to an increase in the average grain *** tensile test suggests that the bimodal grain structured samples exhibited both high strength and ductility,yield strengths of621-877 MPa and ultimate tensile strengths of1187-1367 MPa with uniform elongations of 55.0%-71.4%.The superior strength-ductility combination of the samples arises from the specific deformation mechanisms of the bimodal grain *** tensile properties strongly depend on the size ratio and volume fraction of FGs/CGs in addition to the average grain size in the bimodal grain *** grain structures can be modified via changing the pre-strain and annealing temperature.

关键词： Biomaterials Bimodal grain structure Deformation heterogeneity Pinning High strength/ductility

Microstructure and Tensile Behavior of a Nano-Structured Al-Fe Based Alloy

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2004年第Z2期22卷 65-68页

作者： Won-Yong Kim Jae-Sung park mok-Soon Kim Tae-Yeub Ra Advanced Materials R&D Center Korea Institute of Industrial Technology # 472Kajwa-dongSuh-guIncheon 404-254Korea School of Materials Science and EngineeringInha University # 253Yonghyun-dongNam-guIncheon 402-751Korea School of Materials Science and EngineeringInha University # 253Yonghyun-dongNam-guIncheon 402-751Korea Advanced Materials R&D CenterKorea Institute of Industrial Technology # 472Kajwa-dongSuh-guIncheon 404-254Korea

Room temperature deformation behavior of A1-8Fe-2Mo-2V-1Zr alloy produced by spray forming and subsequent warm-extrusion at 693 K and/or rolling at 423 K was investigated in terms of tensile test and microstructural *** the specimen processed by spray forming and warm extrusion, the microstructure consisting of equiaxed grains with the average grain size of 500 nm in the matrix phase and uniformly dispersed fine intermetallic A13(Fe, Mo, V, Zr) and A16(Fe, Mo, V, Zr) phases less than 100 nm was characterized. It was revealed that subsequent warm rolling after warm extrusion promotes precipitation of a fine dispersoid from the supersaturated matrix phase. Warm rolling was found to be effective to increase the yield and tensile strength in the high strain rate regime. Elongation of the warm rolled specimen showed highe r value than extruded specimen over the whole strain rate region studied.

关键词： microstructure tensile deformation A1-Fe based alloy spray forming extrusion warm rolling precipitation strain rate sensitivity

Photoinduced difunctionalization with bifunctional reagents containing N-heteroaryl moieties

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2023年第6期66卷 1688-1700页

作者： Wooseok Lee Inyoung park Sungwoo hong Department of Chemistry Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea Center for Catalytic Hydrocarbon Functionalizations Institute for Basic Science(IBS)Daejeon 34141Republic of Korea

Bifunctional reagents that serve as dual coupling partners with an activating species have emerged as valuable synthetic tools in organic *** allow for the development of diverse reaction modes with enhanced efficiency and structural variability,which is in high demand for atom-economic and sustainable *** them,bifunctional reagents containing Nheteroaryl groups have received much attention due to their ability to introduce privileged N-heteroaryl moieties into complex molecules that are otherwise challenging to ***,these reagents have been employed under visible-light conditions to achieve various synthetic applications,enabling difunctionalization of alkenes,alkynes,and[1.1.1]propellanes under mild reaction conditions,providing access to highly functionalized *** this review,we provide an overview of the recent achievements and applications of photoinduced difunctionalization using bifunctional reagents containing N-heteroaryl *** systematically categorize the representative contributions in the field based on bifunctional reagents and their reactivity *** review aims to highlight the potential of these reagents as powerful synthetic tools for sustainable and diverse synthesis.

关键词： bifunctional reagents N-heteroarylation photoreaction difunctionalization radical reaction

同方期刊数据库

Refractory lipoatrophy treated with autologous whole blood injection:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2025年第2期13卷 33-38页

作者： Wonnam Kim Jun Su park En Hyung Kim Department of Pharmacology School of Korean MedicinePusan National UniversityYangsan 50612GyeongnamSouth Korea Department of Dermatology College of MedicineChungbuk National UniversityCheongju 28644ChungbukSouth Korea Department of Dermatology Chungbuk National University HospitalCheongju 28644ChungbukSouth Korea

BACKGROUND Intramuscular corticosteroid injection may cause adverse effects such as dermal and/or subcutaneous atrophy,alopecia,hypopigmentation,and *** cutaneous atrophy can spontaneously resolve,several treatment options have been suggested for this *** SUMMARY In this paper,we report a case of corticosteroid injection induced lipoatrophy treated with autologous whole blood(AWB)injection,as the condition had been unresponsive to fractional laser therapy.A 29-year-old female patient visited the dermatology clinic complaining of skin depression on her right buttock area,which had appeared six months *** had been only subtle improvement at the margins after fractional CO_(2) laser treatment;therefore,after obtaining informed consent from the patient,AWB treatment was *** month after the first AWB injection,the size and depth of the lesion had noticeably improved,and a slight improvement was also observed in *** Close observation is the initial treatment of choice for steroid induced skin atrophy;however,for patients in need of immediate cosmetic improvement,AWB injection may be a safe and cost-effective alternative.

关键词： Atrophy Corticosteroid Subcutaneous fat Autologous whole blood injection Laser therapy Case report