检索结果-南通市图书馆

Defect Engineering in Earth-Abundant Cu_(2)ZnSnSe_(4) Absorber Using Efficient Alkali Doping for Flexible and Tandem Solar Cell Applications

引用

Energy & Environmental Materials 2024年第2期7卷 249-256页

作者： Muhammad Rehan Ara Cho Inyoung Jeong Kihwan Kim Asmat Ullah Jun-Sik Cho Joo Hyung Park Yunae Jo Sung Jun Hong seung kyu ahn SeJin ahn Jae Ho Yun Jihye Gwak Donghyeop Shin Photovoltaics Research Department Korea Institute of Energy Research(KIER)152-Gajeong-roYuseong-guDaejeon 34129Korea Department of Renewable Energy Engineering University of Science and Technology(UST)217-Gajeong-roYuseong-guDaejeon 34113Korea Korea Institute of Energy Technology(KENTECH) 50772 Ujeong-roNaju Jeonnam 58217Korea

To demonstrate flexible and tandem device applications,a low-temperature Cu_(2)ZnSnSe_(4)(CZTSe)deposition process,combined with efficient alkali doping,was ***,high-quality CZTSe films were grown at 480℃by a single co-evaporation,which is applicable to polyimide(PI)*** of the alkali-free substrate,Na and K alkali doping were systematically studied and optimized to precisely control the alkali distribution in *** bulk defect density was significantly reduced by suppression of deep acceptor states after the(NaF+KF)*** the low-temperature deposition with(NaF+KF)PDTs,the CZTSe device on glass yields the best efficiency of 8.1%with an improved Voc deficit of 646 *** developed deposition technologies have been applied to *** the first time,we report the highest efficiency of 6.92%for flexible CZTSe solar cells on ***,CZTSe devices were utilized as bottom cells to fabricate four-terminal CZTSe/perovskite tandem cells because of a low bandgap of CZTSe(~1.0 eV)so that the tandem cell yielded an efficiency of 20%.The obtained results show that CZTSe solar cells prepared by a low-temperature process with in-situ alkali doping can be utilized for flexible thin-film solar cells as well as tandem device applications.

关键词： alkali doping Earth-abundant Cu_(2)ZnSnSe_(4) flexible solar cells four-terminal tandem cells low-temperature process

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Linearization of T-S fuzzy systems and robust H_∞ control

引用

Journal of Central South University 2011年第1期18卷 140-145页

作者： YOON Tae-Sung 王法广 PARK seung-kyu KWAK Gun-Pyong ahn Ho-kyun School of Mechatronics Changwon National University

Takagi-Sugeno(T-S) fuzzy model is difficult to be linearized because of membership functions ***,novel T-S fuzzy state transformation and T-S fuzzy feedback are proposed for the linearization of T-S fuzzy *** novel T-S fuzzy state transformation is the fuzzy combination of local linear transformation which transforms local linear models in the T-S fuzzy model into the local linear controllable canonical *** fuzzy combination of local linear controllable canonical model gives controllable canonical T-S fuzzy model and then nonlinear feedback is obtained *** the linearization of T-S fuzzy model,a robust H∞ controller with the robustness of sliding model control(SMC) is *** a result,controlled T-S fuzzy system shows the performance of H∞ control and the robustness of SMC.

关键词： T-S fuzzy control linearization H∞ control sliding mode control

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Randomized clinical trial of a bladder neck plication stitch during robot-assisted radical prostatectomy

引用

Asian Journal of Andrology 2015年第2期17卷 304-308,I0011页

作者： seung-Kwon Choi Sejun Park Hanjong ahn Department of Urology University of Ulsan College of Medicine Asan Medical Center Seoul Korea Department of Urology University of Ulsan College of Medicine Ulsan University Hospital Utsan Korea

Urinary incontinence after robot-assisted radical prostatectomy （RARP） is one of the most bothersome complications affecting patients＇ daily lives. The efficacy of the bladder neck plication stitch technique in promoting an earlier return of continence was prospectively evaluated in 158 patients who underwent RARP for clinically localized prostate cancer by a single surgeon at our institute from March 2012 to January 2013. Patients were randomized 1：1 to undergo surgery with （n = 79） or without （n = 79） the bladder neck plication stitch, and their time to recovery from incontinence, defined as being pad free, was compared. Recovery from incontinence at 1, 3, and 6 months were observed in 22 （27.8%）, 42 （53.2%）, and 57 （72.2%） patients, respectively, treated with, and 23 （29.1%）, 47 （59.5%）, and 59 （74.7%） patients, respectively, treated without the bladder neck plication stitch, with no significant difference in time to recovery from incontinence between the two groups. Multivariate analysis showed that age, membranous urethral length and shape of the prostatic apex on magnetic resonance imaging were independent predictors of early recovery from urinary incontinence after RARP. The bladder neck plication stitch had no effect on time to recovery from postoperative urinary incontinence following RARR

关键词： prostatectomy prostatic neoplasms urinary incontinence urologic surgical procedures

来源：

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

Transient elastography in chronic hepatitis B: An Asian perspective

引用

World Journal of Gastroenterology 2010年第41期16卷 5173-5180页

作者： seung Up Kim Kwang-Hyub Han Sang Hoon ahn Department of Internal Medicine Institute of Gastroenterology Yonsei University College of Medicine Seoul 120-752 South Korea Liver Cirrhosis Clinical Research Center Seoul 120-752 South Korea Brain Korea 21 Project for Medical Science Seoul 120-752 South Kore

Transient elastography (TE) is a new non-invasive tool for assessing liver stiffness, which is correlated with the histologic stage of liver fibrosis. Many studies have reported a good accuracy of TE in predicting signif icant fibrosis and an optimal accuracy in predicting cirrhosis. Furthermore, the potential role of TE in screening the general population has also been proven. TE thus helps physicians to decide treatment strategies, predict prog-nosis, and monitor disease progression in patients with chronic liver disease and to screen the general popula-tion to identify high risk patients with potential liver disease. However, most data on the clinical roles of TE have been gathered in European patients with chronic hepatitis C (CHC), because TE was first developed in France. Accordingly, much data on the usefulness of TE in patients with CHC has accumulated. Recently, however, vigorous efforts have been made to apply TEto patients with chronic hepatitis B (CHB), and TE has also proved to have acceptable accuracy in diagnosing liver fibrosis and cirrhosis in these patients. Thus, we focused on TE in the Asian population with CHB in comparison with the European population with CHC and found that the diagnostic performance and cutoff values were different between the 2 populations possibly as a result of several different confounders between Asian and European populations (the etiology of chronic liver disease, histologic features, major fluctuation in alanine aminotransferase levels, and the prevalence of high body mass index and metabolic syndrome). Therefore, further studies tailored to the Asian population with CHB should be performed before the widespread application of TE in Asian populations with CHB.

关键词： Asia Chronic hepatitis B Fibroscan Hepatitis B virus Liver stiffness measurement Transient elas-tography

来源：

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

Non-invasive prediction of forthcoming cirrhosis-related complications

引用

World Journal of Gastroenterology 2014年第10期20卷 2613-2623页

作者： Wonseok Kang seung Up Kim Sang Hoon ahn Department of Internal Medicine Institute of Gastroenterology Yonsei University College of Medicine Seoul 120-752 South Korea Liver Cirrhosis Clinical Research Center Seoul 120-752 South Korea

In patients with chronic liver diseases,identification of significant liver fibrosis and cirrhosis is essential for determining treatment strategies,assessing therapeutic response,and stratifying long-term *** liver biopsy remains the reference standard for evaluating the extent of liver fibrosis in patients with chronic liver diseases,several non-invasive methods have been developed as alternatives to liver *** of these non-invasive methods have demonstrated clinical accuracy for diagnosing significant fibrosis or cirrhosis in many cross-sectional studies with the histological fibrosis stage as a reference ***,non-invasive methods cannot be fully validated through cross-sectional studies since liver biopsy is not a perfect surrogate endpoint ***,recent studies have focused on assessing the performance of non-invasive methods through longterm,longitudinal,follow-up studies with solid clinical endpoints related to advanced stages of liver fibrosis and *** a result,current view is that these alternative methods can independently predict future cirrhosis-related complications,such as hepatic decompensation,liver failure,hepatocellular carcinoma,or liver-related *** clinical role of non-invasive models seems to be shifting from a simple tool for predicting the extent of fibrosis to a surveillance tool for predicting future liver-related *** this article,we will summarize recent longitudinal studies of non-invasive methods for predicting forthcoming complications related to liver cirrhosis and discuss the clinical value of currently available non-invasive methods based on evidence from the literature.

关键词： Non-invasive model Prediction Cirrhosis Complication Liver-related events

来源：

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

Functional Materials and Innovative Strategies for Wearable Thermal Management Applications

引用

Nano-Micro Letters 2023年第9期15卷 562-603页

作者： Yeongju Jung Minwoo Kim Taegyeom Kim Jiyong ahn Jinwoo Lee seung Hwan Ko Applied Nano and Thermal Science Lab Department of Mechanical EngineeringSeoul National University1 Gwanak-roGwanak-guSeoul 08826South Korea Department of Mechanical Roboticsand Energy EngineeringDongguk University30 Pildong-ro 1-gilJung-guSeoul 04620South Korea Institute of Advanced Machinery and Design(SNU-IAMD) Seoul National UniversityGwanak-roGwanak-guSeoul 08826South Korea Institute of Engineering Research Seoul National University1 Gwanak-roGwanak-guSeoul 08826South Korea

Thermal management is essential in our body as it affects various bodily functions,ranging from thermal discomfort to serious organ failures,as an example of the worst-case *** have been extensive studies about wearable materials and devices that augment thermoregulatory functionalities in our body,employing diverse materials and systematic approaches to attaining thermal *** paper reviews the recent progress of functional materials and devices that contribute to thermoregulatory wearables,particularly emphasizing the strategic methodology to regulate body *** exist several methods to promote personal thermal management in a wearable *** instance,we can impede heat transfer using a thermally insulating material with extremely low thermal conductivity or directly cool and heat the skin ***,we classify many studies into two branches,passive and active thermal management modes,which are further subdivided into specific *** from discussing the strategies and their mechanisms,we also identify the weaknesses of each strategy and scrutinize its potential direction that studies should follow to make substantial contributions to future thermal regulatory wearable industries.

关键词： Thermal management Passive heat transfer Active heat transfer Wearable materials Wearable device

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fabrication of SiC_p/AA5083 composite via friction stir welding

引用

中国有色金属学会会刊：英文版 2012年第S3期22卷 634-638页

作者： Byung-Wook ahn Don-Hyun CHOI Yong-Hwan KIM seung-Boo JUNG School of Advanced Materials Science and Engineering Sungkyunkwan University

Microstructure and mechanical properties of SiCp /AA5083 composite fabricated by friction stir welding (FSW) were *** influence of the number of FSW passes on the distribution of SiC particles and mechanical properties in the joint was *** one pass,the SiC particles were entangled in the upper side of the stir zone (SZ).However,the particle distribution became more uniform after two passes due to the repeated stirring of the *** the SiC particles facilitate the grain refinement in the SZ by the pinning effect,the particle including region has much smaller grain size than the SZ without SiC *** SiCp /AA5083 composite region exhibits a Vickers hardness of HV90,which is much higher than the value of HV80 in the SZ produced by FSW without SiC particles.

关键词： metal matrix composite SiC particle friction stir welding mechanical property

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Acupuncture: a potent therapeutic tool for inducing adult neurogenesis

引用

Neural Regeneration Research 2015年第1期10卷 33-35页

作者： Min-Ho Nam Kwang Seok ahn seung-Hoon Choi Department of Pathology College of Korean Medicine Kyung Hee University

Acupuncture has been broadly used as a major therapeutic tool for at least 2,100 years in East Asia. Acupuncture is used for improving the pathological condition of remote organs, such as stomach, liver, brain, etc. by stimulating skin and muscle with fine metal needles through meridians which have been regarded as pathways of Qi within the body （Ernst, 2006）. Physicians in East Asia have tried to treat many kinds of diseases by acupuncture and it was considerably success- ful. Various diseases for which acupuncture is known to be effective, are neurological diseases, including sequelae of stroke, Alzheimer＇s disease （AD）, Parkinson＇s disease （PD）, and so on （Nam et al., 2013）.

关键词： Acupuncture a potent therapeutic tool for inducing adult neurogenesis NSCs

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Catalytic dehydrogenation of formic acid over palladium nanoparticles immobilized on fibrous mesoporous silica KCC-1

引用

Chinese Journal of Catalysis 2019年第11期40卷 1704-1712页

作者： Siqian Zhang Yingjie Qian Wha-seung ahn Department of Chemistry and Chemical Engineering Inha University Incheon 402-751 Republic of Korea

Uniform Pd nanoparticles immobilized on N-(3-trimethoxysilylpropyl)diethylenetriamine (PDETA)-functionalized fibrous silica KCC-1 (Pd/KCC-1-PDETA) were prepared with a mean Pd particle size of 2.8 nm. After characterization using powder X-ray diffraction, X-ray photoelectron spectroscopy, and N2 adsorption-desorption isotherms, Pd/KCC-1-PDETA was used as catalyst for additive-free dehydrogenation of formic acid to produce H2. Pd nanoparticle catalysts supported on two other mesoporous silica materials (MSF and KIT-6) were also synthesized to examine how the support affects the reaction. Among the three catalysts, Pd/KCC-1-PDETA exhibited significant catalytic activity (a turnover frequency of 332 h?1 at 323 K and 100% selectivity towards hydrogen), owing to the unique fibrous morphology of KCC-1 and the presence of amine groups that reduced the Pd particle size and improved the access of reactant to the catalytically active Pd sites. The influence of Pd loading (2–10 wt.%), reaction temperature, and reaction time was also examined for the dehydrogenation reaction. Pd/KCC-1-PDETA was recovered easily after the reaction and showed good reusability up to five times without any significant loss in catalytic performance.

关键词： Fibrous nanosilica KCC-1 Palladium nanoparticles Hydrogen storage Formic acid dehydrogenation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Facile synthesis of microporous carbonaceous materials derived from a covalent triazine polymer for CO2 capture

引用

Journal of Energy Chemistry 2017年第5期26卷 965-971页

作者： Pillaiyar Puthiaraj Wha-seung ahn Department of Chemistry and Chemical Engineering Inha UniversityIncheon 402-751South Korea

Highly porous nitrogen-doped carbon materials were synthesized by the carbonization of a low-cost porous covalent triazine polymer, PCTP-3, which had been synthesized by the AlClcatalyzed FriedelCrafts reaction of readily available monomers. The nature of the bond and structure of the resulting materials were confirmed using various spectroscopic methods, and the effects of KOH activation on the textural properties of the porous carbon materials were also examined. The KOH-activated porous carbon（aPCTP-3c） materials possessed a high surface area of 2271 mgand large micro/total pore volumes of 0.87/0.95 cmg, respectively, with narrower micropore size distributions than the porous carbon prepared without activation（PCTP-3c）. The aPCTP-3c exhibited the best COuptakes of 284.5 and 162.3 mg gand CHuptakes of 39.6 and 25.9 mg gat 273 and 298 K/1 bar, respectively, which are comparable to the performance of some benchmark carbon materials under the same conditions. The prepared materials exhibited high CO/Nselectivity and could be regenerated easily.

关键词： Porous carbons Covalent triazine polymer Carbonization CO2 capture Selectivity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：