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A new database of building-space-specific internal loads and load schedules for performance based code compliance modeling of commercial buildings

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Building Simulation 2024年第6期17卷 877-892页

作者： Yunyang Ye Cary A.Faulkner wooyoung jung Jian Zhang Eli Brock Pacific Northwest National Laboratory RichlandWA99354USA University of Pittsburgh PittsburghPA15260USA

Building-level loads and load schedules prescribed by current modeling rules save modelers time and provide standards during whole building performance ***,recent studies show that they sometimes insufficiently capture the entire building performance due to the varied loads and load schedules for different space *** a solution to this issue,this paper presents a database of default building-space-specific loads and load schedules for use in energy modeling,and in particular code compliance modeling for commercial *** existing sets of default loads and load schedules are reviewed and the challenges behind using them for specific research topics are ***,the proposed method to develop the building-space-specific loads and load schedules is *** that,the database for these building-space-specific loads and load schedules is *** addition,one case is studied to demonstrate the applications of these loads and load *** this case study,three methods are used to develop building energy models:space-specific(using knowledge of the distribution and location of space types and applying the space-specific data in the developed database),building-level(assuming a lack of knowledge of the space types and using the building-level data in the developed database),and calculated-ratio(assuming knowledge of the distribution of space types but not their locations and calculating weighted average values based on the space-specific data in the developed database).The energy results simulated by using these three methods are compared,which shows building-level methods can produce significantly different absolute energy and energy savings results than the results using space-specific ***,this paper discusses the application scope and maintenance of this new database.

关键词： load load schedule space specific building energy modeling code compliance

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谷歌的创意秘决

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艺术与设计 2023年第8期284卷 118-123页

作者：朴恩星郑佑荣(图) 刘祖龙(翻译) 不详

想要使自己的企业在竞争中占据优势并有自己的特色,其关键就是创新。但在当今这种竞争日益激烈的商业世界中,所谓创新究竟指的是什么?“创新”的定义,是指“对新创意的成功利用”,这就是说先找到或孕育出新创意,那么,创意从何而来?

关键词：新创意日益激烈竞争创新

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乐高,在系统中建立创意

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艺术与设计 2023年第7期1卷 118-123页

作者：金真希朴恩星尹美妍(图) 郑佑荣(图) 信勋(图) 刘祖龙(翻译) 不详

在所有砖块的大小和颜色都相同的前提下,六块乐高砖能够创造出多达915103765种组合,两块乐高砖就可以创造出24种不同的组合。换句话说,不同尺寸和颜色的砖块在创造变化方面几乎没有限制。乐高砖块的生产量如今已经达到人均八十块。从193... 详细信息

在所有砖块的大小和颜色都相同的前提下,六块乐高砖能够创造出多达915103765种组合,两块乐高砖就可以创造出24种不同的组合。换句话说,不同尺寸和颜色的砖块在创造变化方面几乎没有限制。乐高砖块的生产量如今已经达到人均八十块。从1932年创立至今,在近百年的时间里,乐高已经成为全球最畅销的玩具大王。

关键词：乐高砖块不同尺寸生产量近百年颜色

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Instagram:创意创造成功

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艺术与设计 2023年第6期282卷 120-123页

作者：金真希朴恩星尹美妍(图) 郑佑荣(图) 信勋(图) 刘祖龙(翻译) 不详

一对夫妇在墨西哥的海滩上散步。妻子说:“我不想拍照,因为我的照片看起来不怎么样,不如你另一个朋友分享的照片好看?”丈夫告诉她,那是因为那位朋友使用了滤镜。然后妻子她说:“既然你这么了解,那你之前肯定有滤镜。”这对夫妇是Instag... 详细信息

一对夫妇在墨西哥的海滩上散步。妻子说:“我不想拍照,因为我的照片看起来不怎么样,不如你另一个朋友分享的照片好看?”丈夫告诉她,那是因为那位朋友使用了滤镜。然后妻子她说:“既然你这么了解,那你之前肯定有滤镜。”这对夫妇是Instagram的首席执行官凯文·西斯特罗姆(KevinSystrom),以及他当时的女友、现在的妻子妮可·舒茨(Nicole Schuetz)。那个滤镜就是X-ProII,Instagram的第一个滤镜。

关键词：滤镜首席执行官照片

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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].

关键词：

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Study on durability of Pt supported on graphitized carbon under simulated start-up/shut-down conditions for polymer electrolyte membrane fuel cells

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Journal of Energy Chemistry 2018年第1期27卷 326-334页

作者： Won Suk jung Department of Chemical Engineering University of South CarolinaColumbiaSC 29208USA

The primary issue for the commercialization of proton exchange membrane fuel cell（PEMFC） is the carbon corrosion of support under start-up/shut-down conditions. In this study, we employ the nanostructured graphitized carbon induced by heat-treatment. The degree of graphitization starts to increase between 900 and 1300 ℃ as evidenced by the change of specific surface area, interlayer spacing, and ID/IG value. Pt nanoparticles are deposited on fresh carbon black（Pt/CB） and carbon heat-treated at 1700 ℃（Pt/HCB17） with similar particle size and distribution. Electrochemical characterization demonstrates that the Pt/HCB17 shows higher activity than the Pt/CB due to the inefficient microporous structure of amorphous carbon for the oxygen reduction reaction. An accelerating potential cycle between 1.0 and 1.5 V for the carbon corrosion is applied to examine durability at a single cell under the practical start-up/shutdown conditions. The Pt/HCB17 catalyst shows remarkable durability after 3000 potential cycles. The Pt/HCB17 catalyst exhibits a peak power density gain of 3%, while the Pt/CB catalyst shows 65% loss of the initial peak power density. As well, electrochemical surface area and mass activity of Pt/HCB17 catalyst are even more stable than those of the Pt/CB catalyst. Consequently, the high degree of graphitization is essential for the durability of fuel cells in practical start-up/shut-down conditions due to enhancing the strong interaction of Pt and π-bonds in graphitized carbon.

关键词： Polymer electrolyte membrane fuel ceils Membrane electrolyte assembly Carbon corrosion Start-up/shut-down Durability

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Tolerating Permanent State Transition Faults in Asynchronous Sequential Machines

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Journal of Computer Science & Technology 2016年第5期31卷 1028-1037页

作者： jung-Min Yang School of Electronics Engineering Kyungpook National University Daegu 41566 Korea

Corrective control theory lays a novel foundation for the fault-tolerant control of asynchronous sequential machines. In this paper, we present a corrective control scheme for tolerating permanent state transition faults in the dynamics of asynchronous sequential machines. By a fault occurrence, the asynchronous machine may be stuck at a faulty state, not responding to the external input. We analyze the detectability of the considered faults and present the necessary and sufficient condition for the existence of a controller that overcomes any permanent transition faults. Fault tolerance is realized by using potential reachability and asynchronous mechanisms in the machine. A case study on an asynchronous counter is provided to illustrate the proposed fault detection and tolerance scheme.

关键词： asynchronous sequential machine corrective control permanent fault fault tolerance

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Next High Performance and Low Power Flash Memory Package Structure

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Journal of Computer Science & Technology 2007年第4期22卷 515-520页

作者： jung-Hoon Lee ERI Control Instrumentation EngineeringGyeongSang National UniversityJinju660-701Korea

In general, NAND flash memory has advantages in low power consumption, storage capacity, and fast erase/write performance in contrast to NOR flash. But, main drawback of the NAND flash memory is the slow access time for random read operations. Therefore, we proposed the new NAND flash memory package for overcoming this major drawback. We present a high performance and low power NAND flash memory system with a dual cache memory. The proposed NAND flash package consists of two parts, i.e., an NAND flash memory module, and a dual cache module. The new NAND flash memory system can achieve dramatically higher performance and lower power consumption compared with any conventionM NAND-type flash memory module. Our results show that the proposed system can reduce about 78% of write operations into the flash memory cell and about 70% of read operations from the flash memory cell by using only additional 3KB cache space. This value represents high potential to achieve low power consumption and high performance gain.

关键词： flash memory NAND-type NOR-type memory localities buffer or cache memory

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Plant-pollinator metanetworks in fragmented landscapes:a simulation study

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Ecological Processes 2023年第1期12卷 415-424页

作者： Ehsan Rahimi Chuleui jung Agricultural Science and Technology Institute Andong National UniversityAndong City 36729Republic of Korea Department of Plant Medicals Andong National UniversityAndong CityRepublic of Korea

Background The topology of the plant-pollinator network can be explained by the species’abundance and their random ***-pollinator networks can be studied in the context of a landscape,because each patch can accommodate a certain local *** populations of pollinators in the landscape can be connected through migration and then constitute a metanetwork that is known as a combination of spatial and ecological *** this regard,habitat fragmentation can affect the topology of plant-pollinator metanetworks through changes in the species abundance and limiting their ***,it is not clear what pattern(fragmented or aggregated)of the landscape structure can accommodate networks with a higher degree of *** we created simulated landscapes with different forest proportions scenarios(from 5%to 50%of the total landscape)and degrees of ***,for each landscape,we limited the proportion of pollinators to the forest *** assumed that plants and pollinators are randomly distributed around the landscape and interact *** used landscape metrics to measure different aspects of landscape structure and bipartite metrics for calculating the degree of specialization in plant-pollinator *** The statistical relationship between bipartite and landscape metrics showed that the relationship between the topology of plant-pollinator networks and the landscape structure is affected by the forest amount in the landscape and the degree of forest *** also found that according to the nestedness and H2(a measure of specialization)metrics,fragmented landscapes contain more general plant-pollinator *** Our findings suggest that fragmented landscapes,characterized by scattered forest patches,can promote higher levels of interaction between limited pollinators and diverse flowers,leading to more general plant-pollinator networks.

关键词： Plant–pollinator metanetwork Habitat fragmentation Simulated landscape Landscape metrics Bipartite metrics

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Asymptotic T_u-Toeplitzness of weighted composition operators on H^2

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Science China Mathematics 2018年第5期61卷 881-896页

作者： Sungeun jung Department of Mathematics Hankuk University of Foreign Studies

Given a unilateral forward shift S acting on a complex,separable,infinite dimensional Hilbert space H,an asymptotically S-Toeplitz operator is a bounded linear operator T on H satisfying that{S^(*n)T S^n}is convergent with respect to one of the topologies commonly used in the algebra of bounded linear operators on *** this paper,we study the asymptotic T_u-Toeplitzness of weighted composition operators on the Hardy space H^2,where u is a nonconstant inner function.

关键词： Toeplitz operator asymptotically S-Toeplitz operator weighted composition operator inner function

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