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Optoelectronic devices based on two-dimensional transition metal dichalcogenides

Nano Research 2016年第6期9卷 1543-1560页

作者： He Tian matthew L. chin Sina Najmaei Qiushi Guo Fengnian Xia Hart Wang Madan Dubey Ming Hsieh Department of Electrical Engineering University of Southern California Los Angeles California 90089 USA United States Army Research Laboratory Maryland 20783-1197 USA Department of Electrical Engineering Yale University Connecticut 06511 USA

In the past few years, two-dimensional （2D） transition metal dichalcogenide （TMDC） materials have attracted increasing attention of the research community, owing to their unique electronic and optical properties, ranging from the valley-spin coupling to the indirect-to-direct bandgap transition when scaling the materials from multi-layer to monolayer. These properties are appealing for the development of novel electronic and optoelectronic devices with important applications in the broad fields of communication, computation, and healthcare. One of the key features of the TMDC family is the indirect-to-direct bandgap transition that occurs when the material thickness decreases from multilayer to monolayer, which is favorable for many photonic applications. TMDCs have also demonstrated unprecedented flexibility and versatility for constructing a wide range of heterostructures with atomic-level control over their layer thickness that is also free of lattice mismatch issues. As a result, layered TMDCs in combination with other 2D materials have the potential for realizing novel high-performance optoelectronic devices over a broad operating spectral range. In this article, we review the recent progress in the synthesis of 2D TMDCs and optoelectronic devices research. We also discuss the challenges facing the scalable applications of the family of 2D materials and provide our perspective on the opportunities offered by these materials for future generations of nanophotonics technology.

关键词： transition metaldichalcogenides (TMDCs),optoelectronic device,molybdenum disulfide(MoS2) photodetector,light-emitting diode (LED)

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Use of the Endocuff during routine colonoscopy examination improves adenoma detection: A meta-analysis

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World Journal of Gastroenterology 2016年第43期22卷 9642-9649页

作者： matthew chin William Karnes M Mazen Jamal John G Lee Robert Lee Jason Samarasena matthew L Bechtold Douglas L Nguyen Division of Gastroenterology and Hepatology University of California Irvine Division of Gastroenterology Long Beach Veterans Affairs Health System Division of Gastroenterology University of Missouri Health

AIM To perform meta-analysis of the use of Endocuff during average risk screening *** Scopus, Cochrane databases, MEDLINE/Pub Med, and CINAHL were searched in April 2016. Abstracts from Digestive Disease Week, United European Gastroenterology, and the American College of Gastroenterology meeting were also searched from 2004-2015. Studies comparing EC-assisted colonoscopy(EAC) to standard colonoscopy, for any indication, were included in the analysis. The analysis was conducted by using the Mantel-Haenszel or DerS imonian and Laird models with the odds ratio(OR) to assess adenoma detection, cecal intubation rate, and complications performed. RESULTS Nine studies(n = 5624 patients) were included in the analysis. Compared to standard colonoscopy, procedures performed with EC had higher frequencies for adenoma(OR = 1.49, 95%CI: 1.23-1.80; P = 0.03), and sessile serrated adenomas detection(OR = 2.34 95%CI: 1.63-3.36; P < 0.001). There was no significant difference in cecal intubation rates between the EACgroup and standard colonoscopy(OR = 1.26, 95%CI: 0.70-2.27, I2 = 0%; P = 0.44). EAC was associated with a higher risk of complications, most commonly being superficial mucosal injury without higher frequency for *** The use of an EC on colonoscopy appears to improve pre-cancerous polyp detection without any difference in cecal intubation rates compared to standard colonoscopy.

关键词： Colonoscopy Endocuff Adenoma detection

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Novel case of Trevor's disease:Adult onset and later recurrence

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World Journal of Orthopedics 2017年第1期8卷 77-81页

作者： Amrit S Khalsa Neil S Kumar matthew A chin Richard D Lackman the Department of Orthopaedic Surgery Hahnemann University Hospital the Department of Orthopaedic Surgery Cooper University Hospital

Dysplasia epiphysealis hemimelica(DEH),or Trevor’s disease,is an osteocartilaginous epiphyseal overgrowth typically occurring in *** literature reports6 adult cases and none describe recurrence requiring additional *** present a new-onset proximal tibial DEH in an adult recurring approximately 3 years after open excision.A 39-year-old female presented with a history of right knee pain,swelling,and *** examination revealed a firm proximal tibial *** tomography(CT)imaging showed an exophytic,lobulated,sclerotic mass involving the anterolateral margin of the lateral tibial *** resonance imaging was suggestive of an *** patient underwent curettage of the lesion due to its periarticular *** revealed benign and reactive bone and cartilage consistent with periosteal *** and a half years later,the patient presented with a firm,palpable mass larger than the initial *** revealed a lateral tibial plateau sclerotic mass consistent with recurrent intraarticular DEH.A complete excision was performed and histology showed sclerotic bone with overlying cartilage consistent with *** is a rare epiphyseal osteocartilaginous outgrowth frequently occurring in the long bones of children less than 8 years *** resembles an osteochondroma due to its pediatric presentation and similar histologic *** cases comprise less than 1%of reported *** rate after surgical intervention is *** 1 such case,occurring in a child,has been *** contemplating operative treatment for DEH should note the potential for recurrence and consider complete excision.A follow-up period of several years may be warranted to identify recurrent lesions.

关键词： Trevor’s disease Dysplasia epiphysealis hemimelica Adult recurrence Proximal tibia Exostosis

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三相四线制下配电网无源电能质量综合治理

三相四线制下配电网无源电能质量综合治理

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作者：秦明旭（matthew chin）哈尔滨理工大学

学位级别：硕士

在现代科技取得突飞猛进,尤其在电力电子技术的大量普及的背景下,大功率设备、非线性负荷得以广泛应用,极大地提高了生产力,但也导致配电网面临着越来越严重的问题。尤其在电流不平衡和谐波污染问题上表现得更加突出,严重的降低了电流... 详细信息

在现代科技取得突飞猛进,尤其在电力电子技术的大量普及的背景下,大功率设备、非线性负荷得以广泛应用,极大地提高了生产力,但也导致配电网面临着越来越严重的问题。尤其在电流不平衡和谐波污染问题上表现得更加突出,严重的降低了电流质量。针对此种现象,本文提出基于配电网的无源型电能质量综合治理装置。无源型电能质量综合治理装置旨在解决三相电流不平衡和谐波污染问题,本文首先针对配电网提出了基于三相四线制的“无源型”电能质量综合治理装置的拓扑结构,其由电流不平衡补偿器和无源滤波器两部分构成。通过对电流不平衡补偿器进行理论分析介绍其工作原理,推导电流不平衡补偿导纳的数学表达式,建立其与晶闸管触发角的关系。针对谐波污染问题,提出了一种新型的针对多次谐波的无源型滤波结构,并对其工作原理和参数设计进行推导说明。其次,本文使用了基于瞬时无功功率的i-i电流检测算法。为使其满足三相四线制测量的要求和解决电压不对称的问题,对其进行了改进,通过将基波正序分量与偏差角度相结合,以此得到同步信号,降低电压不对称所导致的检测误差,有效的检测电流的基波分量和谐波分量。结合所设计的目标,对无源型电能质量综合治理装置进行参数配置,并通过Simulink对无源滤波结构、电流检测算法、以及整套无源型电能质量综合治理装置进行仿真分析,得出其特点并验证其有效性。最后,给出以DSP为控制核心的硬件电路设计,在实验室条件下搭建了验证平台,成功的将系统的三相不平衡度降至1.4%,降低谐波含量至3.1%,提升功率因数为0.99,满足电流质量的要求,证明此无源型电能质量综合治理装置的工作能力。

关键词：三相不平衡电流治理无源滤波 DSP

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Apolipoprotein E elicits targetdirected miRNA degradation to maintain neuronal integrity

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Neural Regeneration Research 2025年第9期20卷 2577-2578页

作者： Jiazi Tan chin-Tong Ong Temasek Life Sciences Laboratory National University of SingaporeSingapore Department of Biological Sciences National University of SingaporeSingapore

Apolipoprotein E has diverse functions in neurons:Apolipoprotein E(ApoE)is a glycoprotein that primarily regulates lipid metabolism and transport in the central nervous *** are three predominant human ApoE protein isoforms with cysteine and arginine substitutions at amino acid positions 112 and 158 that impact their lipidation and related functions(Flowers and Rebeck,2020).ApoE2 is characterized by Cys112 and Cys158,ApoE3 by Cys112 and Arg158,whereas ApoE4 contains Arg112 and Arg158.

关键词： metabolism glycoprotein maintain

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Microplastic and nanoplastic exposure and risk of diabetes mellitus

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World Journal of Clinical Cases 2025年第3期13卷 24-29页

作者： Hui-Yi Hsiao Chung-Yi Nien Ruei-Feng Shiu Wei-Chun chin Tzung-Hai Yen Department of Biomedical Sciences College of MedicineChang Gung UniversityTaoyuan 33302TaiwanChina Center for Tissue Engineering Chang Gung Memorial HospitalLinkouTaoyuan 33305TaiwanChina Department of Life Sciences National Central UniversityZhongli 320317TaoyuanTaiwanChina Center of Excellence for The Oceans Taiwan Ocean UniversityKeelung 20224TaiwanChina Institute of Marine Environment and Ecology Taiwan Ocean UniversityKeelung 20224TaiwanChina Department of Chemical and Materials Engineering University of California MercedMercedCA 95343United States Department of Nephrology Clinical Poison CenterChang Gung Memorial HospitalLinkou 33305TaoyuanTaiwanChina School of Traditional chinese Medicine College of MedicineChang Gung UniversityTaoyuan 33302TaiwanChina

The issue of plastic pollutants has become a growing *** microplastics(MPs)(particle size<5 mm)and nanoplastics(NPs)(particle size<1μm)can cause DNA damage,cytotoxicity,and oxidative stress in various *** primary known impacts of microplastic/nanoplastic are observed in the liver and respiratory system,leading to hepatotoxicity and chronic obstructive pulmonary *** research on the effects of MPs and NPs on diabetes is still in its early stages,there are potential *** editorial highlights the risk to diabetics from co-exposure to contaminants and MPs/NPs,supported by evidence from animal studies and the various chemical compositions of MPs/NPs.

关键词： Microplastics Nanoplastics Plastic pollution,Diabetes mellitus Insulin resistance

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Ultracold atomic gases going strong

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National Science Review 2016年第2期3卷 168-170页

作者： Cheng chin James Franck Institute Enrico Fermi InstituteUniversity of Chicago

The year 2015 marks the 20th anniversary of the achievement of Bose-Einstein condensation(BEC)in atomic *** BEC,realized by Eric Cornell,Carl Wieman and Wolfgang Ketterle in1995,commenced an exciting wave to explore quantum few-and many-body *** from solid state matter and helium superfluids,atomic condensates in the gas phase come with

关键词： body BEC Ultracold atomic gases going strong length

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Pre-treatment to Improve the Bake-hardening Response in the Naturally Aged Al-Mg-Si Alloy

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Journal of Materials Science & Technology 2011年第3期27卷 205-212页

作者： chin-Hui Shen Department of Mechanical Engineering Army Academy No.750Longdong Rd.Zhongli CityTaoyuan County 320TaiwanChina

This paper describes pre-treatment methods to improve the bake-hardening response of naturally aged AA6022 （Al-0.6Mg-1.0Si）, which is an alloy used in automotive body panels. These methods are used to accelerate the artificial aging process, which proceeds 30-day period of natural aging. The precipitation behavior of the sheets of this aluminum alloy was analyzed by differential scanning calorimetry （DSC） and electrical conductivity measurements, and subsequently confirmed by microstructure observations by transmission electron microscopy （TEM）. Tensile tests and microhardness measurements were performed to determine the mechanical properties of the samples. Under simulated paint-baking conditions （30 min at 170℃）, the microhardness and the yield strength （YS） of the pre-strained ＋ pre-aged samples were found to be I13 HV and 225 MPa, respectively. These values are considerably higher than those of pre-aged samples, and they did not decrease significantly during the initial stage of artificial aging.

关键词： Pre-aging Pre-straining Natural aging and Bake hardening

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VR and AR in human performance research―An NUS experience

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Virtual Reality & Intelligent Hardware 2020年第5期2卷 381-393页

作者： Jun-Hao YIN chin-Boon CHNG Pooi-Mun WONG Nicholas HO matthew CHUA Chee-Kong CHUI Department of Mechanical Engineering National University of Singapore119077Singapore Institute of Systems Science National University of Singapore119077Singapore

With the mindset of constant improvement in efficiency and safety in the workspace and training in Singapore,there is a need to explore varying technologies and their capabilities to fulfil this *** ability of Virtual Reality(VR)and Augmented Reality(AR)to create an immersive experience of tying the virtual and physical environments coupled with information filtering capabilities brings a possibility of introducing this technology into the training process and *** paper surveys current research trends,findings and limitation of VR and AR in its effect on human performance,specifically in Singapore,and our experience in the National University of Singapore(NUS).

关键词： Human computer interaction Virtual environment Human performance

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Surf-zone dynamics derived from basin-scale experiments

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Water Science and Engineering 2022年第4期15卷 273-284页

作者： David A.chin Department of Chemical Environmentaland Materials EngineeringUniversity of MiamiCoral GablesFL 33146USA

Surf-zone hydrodynamics forced by oblique wave shoaling and breaking on beach slopes were *** results showed that in wave-basin experiments with incident angles in the range of 15°-30°,wave breaking was initiated at a breaker coefficient of around 0.67,which was significantly less than that predicted from empirical relations based on normally incident waves for a given beach slope and deep-water wave *** measurements also showed that subsequent saturated breaking occurred at a breaker coefficient of around 0.47 that was inde-pendent of beach slope in the range of 1∶10 to 1∶*** result is likely applicable to both oblique and normally incident *** is shown that the measured wave heights and longshore velocity profiles in wave-basin studies can be reasonably well predicted by theory with proper ad-justments to the process ***-match formulations were identified for quantifying bottom friction,eddy viscosity,and energy loss due to surface rollers.

关键词： Currents Breaking waves Surf zone Waves Wave basins

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