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Application of Active Contour Model in Tracking Sequential Nearshore Waves

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China Ocean Engineering 2009年第2期23卷 251-266页

作者： Yu-hung HSIAO Min-Chih HUANG Department of Systems and Naval Mechatronic Engineering National Cheng Kung University Tainan 701 China

In the present study, a generalized active contour model of gradient vector flow is combined with the video techniques of Argus system to delineate and track sequential nearshore wave crest profiles in the shoaling process, up to their breaking on the shoreline. Previous applications of active contour models to water wave problems are limited to controllable wave tank experiments. By contrast, our application in this study is in a nearshore field environment where oblique images obtained under natural and varying condition of ambient light are employed. Existing Argus techniques produce plane image data or time series data from a selected small subset of discrete pixels. By contrast, the active contour model produces line image data along continuous visible curves such as wave crest profiles. The combination of these two existing techniques, the active contour model and Argus methodologies, facilitates the estimates of the direction wave field and phase speeds within the whole area covered by camera. These estimates are useful for the purpose of inverse calculation of the water depth. Applications of the present techniques to Hsi-tzu bay where a beach restoration program is currently undertaken are illustrated. This extension of Argus video techniques provides new application of optical remote sensing to study the hydrodynamics and morphology of a nearshore environment.

关键词： active contour model snake video images nearshore

Autoimmune liver diseases in systemic rheumatic diseases

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World Journal of Gastroenterology 2022年第23期28卷 2527-2545页

作者： Chrong-Reen Wang hung-Wen Tsai Department of Internal Medicine National Cheng Kung University HospitalTainan 70403Taiwan Department of Pathology National Cheng Kung University HospitalTainan 70403Taiwan

Systemic rheumatic diseases(SRDs)are chronic,inflammatory,autoimmune disorders with the presence of autoantibodies that may affect any organ or *** dysfunction in SRDs can be associated with prescribed drugs,viral hepatitis,alternative hepatic comorbidities and coexisting autoimmune liver diseases(AILDs),requiring an exclusion of secondary conditions before considering liver *** patterns of overlap diseases depend predominantly on genetic determinants with common susceptible loci widely distributing in both *** AILDs,it is important to identify the overlapping SRDs at an early stage since such a coexistence may influence the disease course and *** co-occurring SRDs in AILDs are Sjögren syndrome(SS),rheumatoid arthritis(RA)or systemic lupus erythematosus(SLE)in autoimmune hepatitis(AIH),and SS,RA or systemic sclerosis in primary biliary *** to different disease complications and therapies,it is imperative to differentiate between SLE liver involvement and SLE-AIH overlap *** options can be personalized to control coexisting conditions of liver autoimmunity and rheumatic manifestations in AILD-SRD overlap *** collaboration between hepatologists and rheumatologists can lead to significant advances in managing such a complex *** this review,we provide a comprehensive overview on coexisting AILDs in different SRDs and the therapeutic approach in managing these overlap diseases.

关键词： Autoimmune liver disease Systemic rheumatic disease Overlap disease Liver function test Drug-induced liver injury Viral hepatitis

Historical development of the Gauss-Bonnet theorem

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Science China Mathematics 2008年第4期51卷 777-784页

作者： WU hung-Hsi(H.Wu) Department of Mathematics University of California

A historical survey of the Gauss-Bonnet theorem from Gauss to Chern.

关键词： Gauss-Bonnet theorem Chern classes characteristic classes 01-02 53-03 53C20

Real-Time Demand Response Management for Controlling Load Using Deep Reinforcement Learning

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Computers, Materials & Continua 2022年第12期73卷 5671-5686页

作者： Yongjiang Zhao Jae hung Yoo Chang Gyoon Lim Department of Computer Engineering Chonnam National UniversityYeosu59626Korea

With the rapid economic growth and improved living standards,electricity has become an indispensable energy source in our ***,the stability of the grid power supply and the conservation of electricity is *** following are some of the problems facing now:1)During the peak power consumption period,it will pose a threat to the power *** and improving the power distribution infrastructure requires high maintenance costs.2)The user’s electricity schedule is unreasonable due to personal behavior,which will cause a waste of *** load as a vital part of incentive demand response(DR)can achieve rapid response and improve demand-side *** load by manually formulating rules,some devices are selective to be adjusted during peak power ***,it is challenging to optimize methods based on manual *** paper uses SoftActor-Critic(SAC)as a control algorithm to optimize the control *** results show that through the coordination of the SAC to control load in CityLearn,realizes the goal of reducing both the peak load demand and the operation costs on the premise of regulating voltage to the safe limit.

关键词： Demand response controlling load SAC CityLearn

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从高速铁路看技术的社会控制

从高速铁路看技术的社会控制

作者：王瑶成都理工大学

学位级别：硕士

二十世纪是人类有史以来技术空前辉煌的时代，也是技术变革引发社会剧烈变化的时代，原子弹的爆炸，核电站的建立，航天时代的到来，计算机和互联网的普及展现着技术发展对人类社会的巨大推动力，人们在尽情享受这些成果的同时，也无时... 详细信息

二十世纪是人类有史以来技术空前辉煌的时代，也是技术变革引发社会剧烈变化的时代，原子弹的爆炸，核电站的建立，航天时代的到来，计算机和互联网的普及展现着技术发展对人类社会的巨大推动力，人们在尽情享受这些成果的同时，也无时无刻不在承受着技术带来的负面效应，这使得对技术进行社会控制显得更加迫切和必要。高速铁路这项高新技术作为一门系统性很强的运营技术已有近五十年的发展历程，但到目前为止，人们对逐渐提升的速度控制技术仍然不能做到完全掌控，材料因素、环境因素、人文因素和科技体制等因素都会给高速铁路运营安全的硬件、软件设施构成不同程度的安全隐患。而我国高速铁路技术由于发展时间短，其中所存在的专业技术的疏漏以及各个技术专业之间的缜密性欠佳和协调性不周等问题仍不可避免。本文以高速铁路为例，对技术的社会控制展开讨论分析。文章由四部分组成：第一部分，围绕技术社会控制的概述及体系进行论述。技术的社会控制，简言之，是指社会对技术活动进行规范的行为过程。它具有普遍性、统一性、阶级性、强制性、多重性、闭环性等特点。对技术进行社会控制在一定程度上维护了社会秩序，推动了社会的进步。控制主体、控制手段及控制过程组成了技术社会控制体系。控制主体包括技术共同体、技术管理者与公众。通过法律手段、行政手段、舆论手段和教育手段对技术进行社会控制。在这个过程中有四个阶段，分别是决策阶段、实施阶段、监控阶段和反馈阶段。这一部分是本篇论文研究的基础。第二部分，论述了本文的研究背景，即世界高速铁路的发展历程。高速铁路的定义是列车行车速度在200km/h以上的铁路。目前高速铁路在十几个国家和地区在建或投入运营，在全世界尤其是中国发展非常迅猛。第三部分，高速铁路快速发展对我国的积极影响：提供便利的运输，缩短出行时间，促进城市间的经济发展以及减少能源消耗。但它的负面效应也不容忽视，对人身安全、身心健康、生态环境、区域经济、其他客运行业都有一定影响。通过分析高速铁路带来的负面效应，引发对其快速发展的伦理审视。第四部分，文章以我国高速铁路发展的社会控制现存问题为切入点，总结出目前社会控制主体行为不规范、控制手段不到位、控制过程不严谨等问题，针对政府、社会及个人的不同角度提出了完善高速铁路社会控制的措施，使它们在控制过程中联合运行，相互配合，相互补充，达到对技术进行有效社会控制的目的。

关键词：技术社会控制高速铁路

A Novel OFDM Receiver with Optimum Second Order Polynomial Nyquist Windowing

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The Journal of China Universities of Posts and Telecommunications 2006年第2期13卷 84-89,102页

作者： SONG Rong-fang AI Si LEUNG Shu-hung College of Telecommunications and Information Engineering Nanjing University of P~ts and Telecommunications Nanjing 210003 P.R. China National Mobile Communications Research Laboratory Southeast University Nanjing 210096 P.R. China Department of Electronic Engineering City University of Hong Kong Kowloon Hong Kong P.R. China

This paper proposes a new receive scheme and a class of time domain second order polynomial Nyquist window functions, and applies them to Orthogonal Frequency-Division Multiplexing （ OFDM ） systems in order to reduce Inter-Carrier Interference （ICI） induced by frequency offset. This paper also analyzes the Signal to ICI plus Noise Ratio （SINR） and Bit Error Rate （BER） performances of the receiver. Additionally, this paper proposes a method to select optimum window parameters to maximize the SINR of the receiver thus providing an adaptive receiving capability. Our results show that the proposed method enables the use of unity roll-off factor, provides better SINR and BER than conventional receive methods whose roll-off factors are generally less than one. The new second order polynomial window is shown to provide better performance than raised cosine and ＂better than ＂ Nyquist window.

关键词： OFDM Nyquist window inter-carrier interference carrier frequency offset

Uprisings, Migrations, and Ethnic Identity： A Study of the Kaxabu in the Taiwan Borderland during the Qing

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Frontiers of History in China 2014年第3期9卷 409-448页

作者： Li-wan hung Institute of Taiwan History Academia Siniea Chinese Taipei

The earliest written record of the term “Kaxabu” dates to the 1908 survey report by the Japanese scholar Ino Kanori. In his study of the Pazzehe tribe in central Taiwan, he wrote： “Kaxabu was the name given by the Pazzehe to Daiyao＇puru, a small division of its ethnic group.” During the Qing era, the Pazzehe was called the Anli group by Chinese speakers in Taiwan, while the Kaxabu were named Puzili she （the Puzili tribe）. Since the Kaxabu originated from the Pazzehe, thus in determining the time when the Kaxabu became distinct from the Pazzehe and in exploring the differences between them, we will also elucidate historical developments before the Japanese colonial era. Using Qing historical materials such as travelogues, expedition-records, newspapers, data from fieldwork, surveys, and interviews, this study traces the intervention of the Qing court into tribal relationships in central Taiwan, beginning with the Dajiaxi she Incident （1731-32）, it touches on the changing environment of the Kaxabu/ Puzili she in their migrations in order to shed light on the development of the two distinctive identities-the Kaxabu and Pazzehe/Anli group. The analysis also reveals the impact of uprisings and migrations upon the border area surrounding Qing Taiwan, as well as problems of ethnic identification and geography.

关键词： statecraft ethnic identity shufan Kaxabu Puzili she migration frontier border

Single-Layer Wideband Circularly Polarized Antenna Using Non-Uniform Metasurface for C-band Applications

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Computers, Materials & Continua 2021年第8期68卷 2487-2498页

作者： Huy hung Tran Khoa Nguyen-Dang Niamat Hussain Faculty of Electrical and Electronic Engineering PHENIKAA UniversityHanoi12116Vietnam PHENIKAA Research and Technology Institute(PRATI) A&A Green Phoenix Group JSCCau Giay11313HanoiVietnam Department of Computer and Communication Engineering Chungbuk National UniversityCheongju 28644Korea

A single-layer design of non-uniform metasurface(MS)based circularly polarized(CP)antenna with wideband operation characteristic is proposed and investigated in this *** antenna is excited by a truncated corner squared patch as a primary radiating CP ***,a non-uniform MS is placed in the same layer with the driven *** increasing the impedance bandwidth,the non-uniform MS also generates two additional CP bands in the high frequency band,leading to significantly increase the antenna’s overall *** use of non-uniform MS distinguishes our design from the other CP MS based antennas in literature,in which the MS is formed by multiple uniform unit cells and placed in different layer with the radiating *** validation,an antenna prototype,whose overall dimensions of 0.94λ_(o)×0.94λ_(o)×0.06λ_(o) at the center operating frequency,is fabricated and experimentally *** measured operating bandwidth with|S11|≤−10 dB and AR≤3 dB is 27.1%(5.1–6.7 GHz)and the broadside gain within this band is from 5.7 to 7.2 *** to the other related works,the proposed antenna has advantage of very wideband operation with single-layer design.

关键词： Circular polarization metasurface non-uniform patch antenna wideband

A wind tunnel study on control methods for cable dry-galloping

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Frontiers of Structural and Civil Engineering 2016年第1期10卷 72-80页

作者： hung D. VO Hiroshi KATSUCHI Hitoshi YAMADA Mayuko NISHIO Department of Civil Engineering Yokohama National University Yokohama 240-8501 Japan

The common vibration of cable caused by rain-wind combination has been known as most typical type and a lot kind of its countermeasures has been proposed for suppressing this phenomenon. Recently, stayed-cables were also proved that they could be excited in dry state （without rain）, which is called dry-galloping. Recently, its mechanisms have been explained by axial flow, Reynolds number and so on. To clarify the characteristics of this galloping, wind tunnel test of a cable model with various kinds of wind angle was conducted. Then, three types of countermeasure were examined to suppress dry- galloping of bridge cable. The tests confirmed that the occurrence of dry-galloping depends on relative wind attacked angles and onset reduced wind speed. Furthermore, single spiral wire, double spiral wire and circular ring were found to have high effectiveness in mitigating this galloping when those are installed properly.

关键词： dry-galloping wind-relative angle single spiral wire double spiral wire circular rings