检索结果-南通市图书馆

Vertically aligned NiS nano-flakes derived from hydrothermally prepared Ni(OH)2 for high performance supercapacitor

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2018年第3期27卷 791-800页

作者： A.M.Patil A.C.Lokhande P.A.Shinde J.H.kim C.D.Lokhande Thin Film Physics Laboratory Department of PhysicsSbivaji UniversityKolbapar 416004 MHIndia Department of Materials Science and Engineering Chonnam National University 300 Yongbong-DongPuk-GuGwangju.South Korea Centre for Interdisciplinaly Research D.Y.Patil UniversityKolhapurIndia

In present work,the vertically aligned Ni S nano-flakes composed thin film is prepared by anionic exchange process in which hydrothermally prepared Ni（OH）2is used as a parent thin film and Na2S as a sulfide ion *** synthesis process produced fully transformed and shape-controlled nano-flakes of Ni S from nano-flowers of Ni（OH）*** electrochemical supercapacitor properties of Ni S electrode are studied with cyclic voltammetry（CV）,galvonostatic charge discharge（GCD）and electrochemical impedance spectroscopy（EIS）*** porous surface area（85 m^2/g）of Ni S nano-flakes makes large material contribution in electrochemical reaction stretching specific capacitance（Cs）of 880 F/g at scan rate of 5 m V/s and 90%electrochemical stability up to 4000 CV cycles in 2 M KOH ***,the flexible solid-state symmetric supercapacitor device（Ni S/PVA–Li ClO4/Ni S）has been fabricated using Ni S electrodes with polyvinyl alcohol（PVA）–lithium perchlorate（Li ClO4）gel *** Ni S/PVA–Li ClO4/Ni S device exhibits specific capacitance of 56 F/g with specific energy of 14.98 Wh/kg and excellent cycling stability after 2000 *** addition,the Ni S/PVA–Li ClO4/Ni S device demonstrates illumination of red light emitting diode（LED）for 60 s,which confirms the practical applicability of Ni S/PVA–Li ClO4/Ni S device in energy storage.

关键词： Anionic exchange process Nickel sulfide Nano-flakes Supercapacitor Thin film

外国投资者持股对真实活动盈余管理的影响——来自韩国上市公司的经验证据

在线全文

学校读者我要写书评

暂无评论

上海管理科学 2015年第2期37卷 53-61页

作者：金宰贤上海交通大学安泰经济与管理学院上海200052

本文利用2008-2012年韩国KOSPI上市公司数据,从真实活动盈余管理角度考察了外国投资者对韩国上市公司的影响。结果表明,随着外国投资者持股比例的提高,真实活动盈余管理程度减少。此外,持股比例超过5%的外国投资者也抑制了管理层的真实... 详细信息

本文利用2008-2012年韩国KOSPI上市公司数据,从真实活动盈余管理角度考察了外国投资者对韩国上市公司的影响。结果表明,随着外国投资者持股比例的提高,真实活动盈余管理程度减少。此外,持股比例超过5%的外国投资者也抑制了管理层的真实活动盈余管理行为,但是外国控股股东对真实活动盈余管理的影响不显著。进一步研究发现,在较好的公司治理环境下,外国投资者持股对真实活动盈余管理具有更为显著的抑制作用。

关键词：外国投资者真实活动盈余管理公司治理韩国上市公司

Transition from fishbone mode toβ-induced Alfvén eigenmode on HL-2A tokamak

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2021年第9期23卷 65-73页

作者： Zhihui ZOU Ping ZHU Charlson C kim Xianqu WANG Yawei HOU CAS Key Laboratory of Geospace Environment and Department of Plasma Physics and Fusion Engineering University of Science and Technology of ChinaHefei 230026Peoples's Republic of China International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074Peoples's Republic of China Department of Engineering Physics University of Wisconsin-MadisonMadisonWisconsin 53706United States of America SLS2 Consulting San DiegoCalifornia 92107United States of America Institute of Fusion Science School of Physical Science and TechnologySouthwest Jiaotong UniversityChengdu 610031Peoples's Republic of China

In the presence of energetic particles(EPs)from auxiliary heating and burning plasmas,fishbone instability and Alfvén modes can be excited and their transition can take place in certain overlapping *** the hybrid kinetic-magnetohydrodynamic model in the NIMROD code,we have identified such a transition between the fishbone instability and theβ-induced Alfvén eigenmode(BAE)for the NBI heated plasmas on HL-2 *** the safety factor at magnetic axis is well below one,typical kink-fishbone transition occurs as the EP fraction *** q0 is raised to approaching one,the fishbone mode is replaced with BAE for sufficient amount of *** q0 is slightly above one,the toroidicity-induced Alfvén eigenmode dominates at lower EP pressure,whereas BAE dominates at higher EP pressure.

关键词： internal kink mode fishbone mode β-induced Alfvén eigenmode(BAE) energetic particles(EPs) HL-2A NIMROD

Cu^+-incorporated TiO_2 overlayer on Cu_2O nanowire photocathodes for enhanced photoelectrochemical conversion of CO_2 to methanol

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2018年第1期27卷 264-270页

作者： Kangha Lee Seokwon Lee Hyunjin Cho Sunil Jeong Whi Dong kim Sooho Lee Doh C.Lee Department of Chemical and Biomolecular Engineering(BK21+program) KAIST Institute for the NanocenturyKorea Advanced Institute of Science and Technology(KAIST)

In this paper, we report photoelectrochemical（PEC） conversion of carbon dioxide（CO_2） using photocathodes based on Cu_2O nanowires（NWs） overcoated with Cu~＋-incorporated crystalline TiO_2（TiO_2–Cu~＋）shell. Cu_2O NW photocathodes show remanent photocurrent of 5.3% after 30 min of PEC reduction of CO_*** coating Cu_2O with TiO_2–Cu~＋ overlayer, the remanent photocurrent is 27.6%, which is an increase by5.2 fold. The charge transfer resistance of Cu_2O/TiO_2–Cu~＋ is 0.423 k/cm2, whereas Cu_2O photocathode shows resistivity of 0.781 k/cm2 under irradiation. Mott–Schottky analysis reveals that Cu~＋ species embedded in TiO_2 layer is responsible for enhanced adsorption of CO_2 on TiO_2 surface, as evidenced by the decrease of capacitance in the Helmholtz layer. On account of these electrochemical and electronic effects by the Cu~＋ species, the Faradaic efficiency（FE） of photocathodes reaches as high as 56.5% when TiO_2–Cu~＋ is added to Cu_2O, showing drastic increase from 23.6% by bare Cu_2O photocathodes.

关键词： Photoelectrochemical CO2 reductionMethanol generation Copper oxide Titanium dioxide Cu+ catalyst

Superresolution structured illumination microscopy reconstruction algorithms:a review

在线全文

学校读者我要写书评

暂无评论

光:科学与应用(英文版) 2023年第8期12卷 1510-1543页

作者： Xin Chen Suyi Zhong Yiwei Hou Ruijie Cao Wenyi Wang Dong Li Qionghai Dai Donghyun kim Peng Xi Department of Biomedical Engineering College of Future TechnologyPeking UniversityBeijing 100871China National Biomedical Imaging Center Peking UniversityBeijing 100871China National Laboratory of Biomacromolecules CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijingChina Department of Automation Tsinghua UniversityBeijingChina Institute for Brain and Cognitive Sciences Tsinghua UniversityBeijingChina Beijing Key Laboratory of Multidimension&Multiscale Computational Photography Tsinghua UniversityBeijingChina Beijing Laboratory of Brain and Cognitive Intelligence Beijing Municipal Education CommissionBeijingChina School of Electrical and Electronic Engineering Yonsei University50 Yonsei-RoSeodaemun-GuSeoul 03722Korea

Structured illumination microscopy(SIM)has become the standard for next-generation wide-field microscopy,offering ultrahigh imaging speed,superresolution,a large fiield-of-view,and long-term *** the past decade,SIM hardware and software have flourished,leading to successful applications in various biological ***,unlocking the full potential of SIM system hardware requires the development of advanced reconstruction ***,we introduce the basic theory of two SIM algorithms,namely,optical sectioning SIM(OS-SIM)and superresolution SIM(SR-SIM),and summarize their implementation *** then provide a brief overview of existing OS-SIM processing algorithms and review the development of SR-SIM reconstruction algorithms,focusing primarily on 2D-SIM,3D-SIM,and *** showcase the state-of-the-art development of SIM systems and assist users in selecting a commercial SIM system for a specific application,we compare the features of representative off-the-shelf SIM ***,we provide perspectives on the potential future developments of SIM.

关键词： illumination hardware offering

Acoustic Emission Monitoring and Microscopic Investigation of Cracks in ERCuNi Cladding

维普期刊数据库评论

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 Materials Science & Technology 2003年第3期19卷 201-205页

作者： S.P.Lu O.Y.Kwon K.J.Lee T.B.kim Department of Mechanical Engineering Inha University253 Yonghyun-dongInchon 402-751KoreaDepartment of Mechanical EngineeringInha University253 Yonghyun-dongInchon 402-751KoreaDepartment of Mechanical EngineeringInha University253 Yonghyun-dongInchon 402-751KoreaDepartment of Mechanical EngineeringInha University253 Yonghyun-dongInchon 402-751Korea

A corrosion resistant CuNi cladding was deposited on SM45C (equivalent to AISI1045) substrate by DC inverse arc welding. During the welding process, a three channel acoustic emission (AE) monitoring system was applied to detect the crack signals generating from both the cladding process and after cladding. Characteristics of the welding crack signal and noise signal had been analyzed systematically. Based on the record time of the signal, the solidification crack and delayed crack were distinguished. By two-dimensional AE source location, the crack position was located, and then investigated by scanning electron microscopy (SEM). Results showed that the AE system could detect the welding crack with high sensitivity and the two-dimensional source location could accurately determine the crack position. Microstructures of the cladding and heat affected zone (HAZ) were examined. Dendrites in the cladding and coarse grains in the HAZ were found.

关键词： Cladding Acoustic emission monitoring Crack CuNi alloy

Effect of Chelated Vanadium Spray on Concentration of Vanadium and Organic Compounds in Tea Shoots

在线全文

学校读者我要写书评

暂无评论

茶叶 2013年第4期39卷 220-222页

作者： In-Kwan Song Tethvoleak Srey Kyunguk Lee Eun-Ui Oh Jian-Liang Lu Seung-Woon Song Bong-Chan kim Young-jae Lee Kwan-Jeong Song Jeju Special Self-Governing Province Agricultural Research and Extension Services Faculty of Bioscience and Industry Jeju National University Department of Tea Sciences Zhejiang University College of Veterinary Medicine Jeju National University

The study aimed to develop vanadium tea products and evaluated the potential of chelated vanadium(V)absorption by tea shoots and effect of vanadium accumulation on tea quality during the first crop *** V application with three times foliar sprays at 5 days intervals starting from 15 days before plucking showed a significant increase in V content of new young shoots,which was much effective at higher ***,one or two times sprays had no increase in V content regardless of spray concentration compared to *** V accumulation in the treated at 3 to 9 times higher that of than the non-treated plants,there were no significant changes in contents of total amino acids,theanine,caffeine,total polyphenols,crude fiber,and cathechins between the treated and the non-treated.

关键词：钒(V) 茶产品喷雾剂螯合叶芽有机物品质影响叶面喷洒

Complete remission of advanced hepatocellular carcinoma by sorafenib: A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2013年第2期5卷 38-42页

作者： Min Su kim Young-Joo Jin Jin-Woo Lee Jung-il Lee Young soo kim Sun young Lee Myoung Hun Chae Department of Internal Medicine Inha University HospitalInha University School of Medicine

Hepatocellular carcinoma (HCC) is the fifth most common malignant disease worldwide, and curative treatment remains difficult because the majority of cases are diagnosed in the advanced stage. Sorafenib is the only known effective systemic treatment, but patients rarely achieve complete remission (CR). A 66-year-old man with a history of alcoholic liver cirrhosis with a diagnosis of advanced HCC, was initially treated with transarterial chemoembolization on four occasions. However, the disease progressed with portal vein thrombosis. Therefore, sorafenib was started, and 4 mo later, the patient achieved CR. The treatment was continued for 12 mo, and CR was maintained up to 4 mo after sorafenib discontinuation.

关键词： Hepatocellular carcinoma Sorafenib Portal vein thrombosis Complete remission

Lithium ion conductivity of complex hydrides incorporating multiple closo–type complex anions

维普期刊数据库评论

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 Energy Chemistry 2019年第11期28卷 84-87页

作者： Naoki Toyama Sangryun kim Hiroyuki Oguchi Toyoto Sato Shigeyuki Takagi Masaru Tazawa Genki Nogami Shin-ichi Orimo Institute for Materials Research Tohoku UniversityKatahira 2-1-1Aoba-kuSendai 980-8577Japan WPI-Advanced Institute for Materials Research(WPI-AIMR) Tohoku UniversityKatahira 2-1-1Aoba-kuSendai 980-8577Japan Mitsubishi Gas Chemicals Co. Inc.182 Tayuhama ShinwariKita-kuNiigata 950-3112Japan

We report the lithium ionic conductivities of closo –type complex hydrides synthesized from various molar ratios of lithium borohydride(LiBH4) and decaborane(B10H14) as starting materials. The prepared closo –type complex hydrides comprised [B12H12]^2-, [B11H11]^2-, and [B10H10]^2- complex anions. In addition, increasing the LiBH4 content in the starting materials increased the amounts of [B11H11]^2- and [B10H10]^2-, leading to an improved ion conductivity of the prepared sample. The present study offers useful insights into strategies for controlling the complex anion composition in emerging solid electrolytes of closo-type complex hydrides at the molecular level, and improving their ionic conductivities.

关键词： Closo-type complex hydride Solid electrolyte Lithium ion conductivity Multiple complex anions