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A simulation-based method to investigate occupant-centric controls

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Building simulation 2021年第4期14卷 1017-1030页

作者： Mohamed M.Ouf June Young park h.Burak Gunay Department of Building Civil and Environmental EngineeringConcordia University1515Rue Sainte-Catherine O.MontrealQCH3G 1MCanada Department of Civil Engineering The University of Texas at ArlingtonArlingtonTX76019USA Department of Civil Engineering Carleton University1125 Colonel By DriveOttawaONK1S 5B6Canada

Occupant-centric control (OCC) strategies rely on different algorithms to learn and predict occupants’ patterns and preferences, then utilize these predictions to optimize building operations. however, testing different OCC algorithms or fine-tuning their configurations in real buildings can be a lengthy process. To this end, we present a framework for testing OCCs in a simulation environment prior to field implementation. The proposed workflow entails using synthetic occupant behaviour models and simulating OCC strategies to learn their preferences. The goal is to enable quick comparison of different OCC configurations under various scenarios by modifying occupant behaviour assumptions, as well as climate and design parameters. For proof-of-concept, the proposed method was applied in a case-study to simulate OCCs for lighting and heating/cooling setpoint adjustments in a single office under various occupant types, as well as OCC settings and design configurations. Results demonstrated the benefits of the proposed framework and its potential for providing a more holistic evaluation of OCCs under different scenarios. Using the proposed framework, building designers and operators can identify potential issues with OCCs and fine-tune their settings prior to field implementation.

关键词： occupant-centric controls building simulations energy efficiency comfort building operations lighting hVAC controls

Importance of surface oxide for the tribology of a Zr-based metallic glass

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Friction 2017年第1期5卷 115-122页

作者： s.J.KANG K.T.RITTGEN s.G.KWAN h.W.park R.BENNEWITZ A.CARON Department of Materials sciences and Engineering Zhejiang University Hangzhou 310058 China NM-Leibniz Institute for New Materials Campus D2.2 Saarbrücken 66123 GermanyDepartment of Physics Saarland University Saarbrücken 66123 Germany KoreaTech Korea University of Technology and Education Chungnam Province 330-708 Republic of Korea NM-Leibniz Institute for New Materials Campus D2.2 Saarbrücken 66123 GermanyKoreaTech Korea University of Technology and Education Chungnam Province 330-708 Republic of Korea

Thermally grown surface oxide layers dominate the single-asperity tribological behavior of a Zr60Cu30Al10 *** in oxidation time leads to an increased contribution of shearing and a corresponding decreased contribution of ploughing to *** change in the dominating friction and wear mechanism results in an overall minor decrease of the friction coefficient of oxidized surfaces compared to the metallic glass sample with native surface *** results demonstrate the importance of creating a stable oxide layer for practical applications of metallic glasses in micro-devices involving sliding contact.

关键词： metallic glasses surface oxide friction wear nanotribology atomic force microscopy

Event-triggered bipartite consensus over cooperation-competition networks under Dos attacks

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science China(Technological sciences) 2021年第1期64卷 157-168页

作者： hU Aihua park J h CAO JinDe hU ManFeng LUO YiPing school of science Jiangnan UniversityWuxi 214122China Department of Electrical Engineering Yeungnam UniversityKyongsan 38541Korea school of Mathematics Southeast UniversityNanjing 210096China College of Electrical and Information Engineering Hunan Institute of EngineeringXiangtan 411104China

This paper addresses the bipartite consensus over cooperation-competition networks affected by denial-of-service(Dos) *** that a network consists of multiple interactive agents, and the relationship between neighboring agents is cooperative or competitive. Meanwhile, information transmission among the agents is unavailable during the intervals of attacks. In order to save communication resources and exclude the Zeno behavior, an event-triggered scheme depending on the sampled-data information from neighboring agents is proposed, and efficient defense strategies in response to the attacks are put *** that the frequency and duration of Dos attacks meet certain requirements, then according to the signed graph theory,the La salle’s invariance principle, and the convergence of monotone sequences, the results of bipartite consensus via the eventtriggered protocol are provided, which are mainly related to the communication topology of the network, the sampling period,and the threshold parameters in the event-triggered scheme. It is shown that the bipartite consensus is realized even though the Dos attacks take place frequently. Furthermore, this paper discusses the bipartite consensus in the presence of Dos attacks with a random unsuccessful rate. Finally, numerical simulations illustrate the theoretical results.

关键词： bipartite consensus denial-of-service(Dos)attack event-triggered scheme structural balance multiagent system

The h∞ Robust stability and Performance Conditions for Uncertain Robot Manipulators

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IEEE/CAA Journal of Automatica sinica 2025年第1期 270-272页

作者： Geun Il song hae Yeon park Jung hoon Kim the Department of Electrical Engineering Pohang University of Science and Technology (POSTECH) the Department of Electrical Engineering Pohang University of Science and Technology (POSTECH) the Institute for Convergence Research and Education in Advanced Technology Yonsei University

Dear Editor,h∞This letter develops a new framework for the robust stability and performance conditions as well as the relevant controller synthesis with respect to uncertain robot *** often exist model uncertainties between the nominal model and the real robot manipulator and disturbances. hence, dealing with their effects plays a crucial role in leading to high tracking performances, as discussed in [1]–[5].

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对肝硬化病人应用压缩感知和同时应用超快速并行采集技术行肝胆期成像

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国际医学放射学杂志 2024年第3期 377页

作者： s.Yoon Y.s.shim s.h.park J.sung M.D.Nickel Y.J.Kim 余翔玲

摘要目的旨在比较肝硬化病人用压缩感知（Cs）和同时应用超快速并行采集技术（CAPIRINhA）的肝胆期（hBP）成像的影像质量和局灶病变检测能力。方法回顾性纳入

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原位肝移植疑有肝动脉缺血病人的多普勒超声检查:中央和肝内动脉波形分析的作用

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国际医学放射学杂志 2013年第3期 281-281页

作者： E.K.Choi D.s.Lu s.h.park J.C.hong s.s.Raman N.Ragavendra 柯勤兵 Departments of Radiology and surgery Ronald Reagan UCLA Medical CenterDavid Geffen School of Medicine at UCLA

目的为了开发一种系统性方法检查原位肝移植怀疑肝动脉缺血病人的肝动脉,比较多普勒超声获取主要肝动脉(mainhepaticartery,MhA)及肝内动脉(intrahepaticartery,IhA)波形的联合参数的诊断价值。材料与方法本回顾性研究符合hIPAA标准,获... 详细信息

目的为了开发一种系统性方法检查原位肝移植怀疑肝动脉缺血病人的肝动脉,比较多普勒超声获取主要肝动脉(mainhepaticartery,MhA)及肝内动脉(intrahepaticartery,IhA)波形的联合参数的诊断价值。材料与方法本回顾性研究符合hIPAA标准,获得机构伦理委员会批准,免除签署知情同意书。从2002年1月1日—2011年11月1日,纳入189例成人病人(男129例,女60例;年龄18～73岁,平均53岁)的195个移植肝脏进行多普勒超声检查及间隔2周以内的随访(CT、MR或常规)血管造影。评价典型的IhA和MhA标准[阻力指数(RI)ssicparvustarduswaveforms)]结合和不结合收缩期流速峰值(PsV)阈值(通过受试者操作特征曲线分析获取)的诊断价值。联合采用无血流分析和最优化MhA及IhA标准的结果创建一个算法,然后将其应用于所有的移植肝脏。结果采用典型标准(RIhA波形比MhA波形表现出更好的敏感度(80%∶55%,P=0.008)。MhA及IhA的最优PsV临界值分别为小于67cm/s及39cm/s。在应用MhA及IhA标准时增加应用PsV阈值会导致总准确率显著下降(IhA:87%∶73%,PhA:82%∶66%,P=0.002)。这种算法的应用反映结合最优MhA及IhA标准和无血流分析结果的算法,可获得96%的敏感度和83%的特异度。结论这种特制的用于评价MhA和IhA乏血流区域分布、拥有定量参数以及波形形态的算法,可提高多普勒超声在检测原位肝移植的高危病人肝动脉并发症的能力。

关键词：原位肝移植 MhA IhA 正位肝移植肝动脉缺血多普勒超声检查肝内病人动脉

Dynamic Response of Mold Oscillator Interacting with steel slabs

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Journal of Iron and steel Research International 2016年第9期23卷 900-909页

作者： Yonghui park hyunchul park Graduate school of Engineering Masterships Pohang University of Science and Technology(POSTECH)

A mathematical model to show the dynamic response of the mold oscillator was suggested. The model con- sidered a frictional interaction between the mold oscillator and slab as several connected nodes. The governing equation considered the slab as a multi-degree-of-freedom （DoF） system, and included a hysteresis model to describe elastic-plastic behavior of the slab; the mold oscillator was given two DoF by utilizing pressure and displacement experiment data. simulations indicate that the mold and slab execute various vibrations, and that mold oscillation marks are caused by a stick-and-slip phenomenon during intervals, in which the slab contacting the mold moves downward compared to the other slab （negative strip time）. The slab shows the formation of mold oscillation marks to previous formation criterion equally when the mold velocity is faster than the casting speed about downward. The oscillation mark will grow up over 2 hz exciting frequency with constant 4 mm stroke in simulations. Finally, the negative strip time was compared to the frictional force, hysteresis variable, and plastic force to investigate formation mechanism of the oscillation marks.

关键词： mold oscillating mechanism mathematical model direct integration method hysteresis model stick-and-slip

Design of small-area multi-bit antifuse-type 1 kbit OTP memory

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Journal of Central south University 2009年第3期16卷 467-473页

作者：李龙镇 LEE J h KIM T h JIN K h park M h hA P B KIM Y h Department of Electronic Engineering Changwon National University Department of Computer science and Technology Yanbian University

A multi-bit antifuse-type one-time programmable （OTP） memory is designed, which has a smaller area and a shorter programming time compared with the conventional single-bit antifuse-type OTP memory. While the conventional antifuse-type OTP memory can store a bit per cell, a proposed OTP memory can store two consecutive bits per cell through a data compression technique. The 1 kbit OTP memory designed with Magnachip 0.18 μm CMOs （complementary metal-oxide semiconductor） process is 34% smaller than the conventional single-bit antifuse-type OTP memory since the sizes of cell array and row decoder are reduced. And the programming time of the proposed OTP memory is nearly 50% smaller than that of the conventional counterpart since two consecutive bytes can be compressed and programmed into eight OTP cells at once. The layout area is 214 μm× 327 μ,, and the read current is simulated to be 30.4 μA.

关键词： multi-bit OTP programming time antifuse memory data compression

Experimental status of the hANBIT Facility

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Plasma science and Technology 2004年第4期6卷 2367-2370页

作者： s.J.Yoo M.Kwon J.G.Bak K.Choh I.s.Choi J.h.Choi J.W.Choi A.C.England J.hong h.s.Jeon h.G.Jhang J.s.Ju M.Jung J.Y.Kim s.s.Kim W.h.Ko K.Y.Kwak M.C.Kyum B.J.Lee D.K.Lee J.h.Lee h.G.Lee s.G.Lee T.Lho h.K.Na B.h.park M.K.park D.C.seo s.h.seo J.h.Yeom J.s.Yoon K.I.You Korea Basic science Institute Daejeon305-333Korea hanbit User Group

hANBIT is a magnetic mirror confinement device. Recent physics experimentshave been mainly focused on identifying discharge characteristics and on getting stable plasmaproduction and operation modes, by using a 500 kW slot antenna system at a fixed RF frequency of 3.5Mhz and varying discharge conditions such as fueling rate, RF power, and B-field intensity incentral cell. Two distinct operation modes are found to be very sensitive to the RF power as well asthe ratio of the RF frequency to the ion cyclotron frequency. A MhD interchange mode of m = - 1 isclearly observed and the stabilizing mechanism can be explained by the sideband coupling theory.

关键词： mirror discharge stabilization