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三坐标自准直光管

中国检验检测 1981年第6期 10-12页

作者： и.a.koняхин 施涌潮

为了解决与角度测量有关的计量问题,常常采用一个坐标和两个坐标的自准直光管来检验物体垂直于自准直光管光轴(准直轴)的一个或两个轴的位置。同时,在许多场合还必须检验物体相对于自准直光管光轴(扭转轴)的迥转,也就是需要检验物体相... 详细信息

为了解决与角度测量有关的计量问题,常常采用一个坐标和两个坐标的自准直光管来检验物体垂直于自准直光管光轴(准直轴)的一个或两个轴的位置。同时,在许多场合还必须检验物体相对于自准直光管光轴(扭转轴)的迥转,也就是需要检验物体相对于三个彼此

关键词：自准直光管焦面光轴视场物镜三坐标平面反射镜平面镜

用坐标测量仪与小型计算机测量和处理直齿与斜齿圆柱齿轮

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国外计量 1983年第4期 1-3页

作者： a.koβler 纪正昆

由于齿轮的复杂几何关系及不同的测试件,需要许多专用的单参数测量仪,而借助计算机控制的坐标测量技术就能综合地进行测量。为了逐点地测量直齿或斜齿圆柱齿轮,一台具有足够精度、带相应测量附件和工作能力高的计算机的自动或手动操作... 详细信息

由于齿轮的复杂几何关系及不同的测试件,需要许多专用的单参数测量仪,而借助计算机控制的坐标测量技术就能综合地进行测量。为了逐点地测量直齿或斜齿圆柱齿轮,一台具有足够精度、带相应测量附件和工作能力高的计算机的自动或手动操作的坐标测量仪是必要的。为了大量测量数据的广泛处理,研制了

关键词：斜齿圆柱齿轮不确定度周节齿厚偏差坐标测量仪渐开线直齿齿面

Brain age estimation:premise,promise,and problems

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Neural Regeneration Research 2025年第8期20卷 2313-2314页

作者： Jarrad Perron Ji Hyun ko Graduate Program in Biomedical Engineering Price Faculty of EngineeringUniversity of ManitobaWinnipegMBCanada PrairieNeuro Research Centre Kleysen Institute for Advanced MedicineHealth Sciences CentreWinnipegMBCanada Department of Human Anatomy and Cell Science Rady Faculty of Health SciencesUniversity of ManitobaWinnipegMBCanada

Premise:The com bined effects of modern healthcare practices which prolong lifespan and declining birthrates have created unprecedented changes in age demographics worldwide that are especially pronounced in Japan,South korea,Europe,and North *** old age is the most significant predictor of dementia,global healthcare systems must rise to the challenge of providing care for those with neurodegenerative disorders.

关键词： estimation providing birth

自旋回波-回波平面成像(SE-EPI)MR弹性成像在慢性肝病或肝硬化病人中的检查成功率和可靠性

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国际医学放射学杂志 2020年第3期 372-372页

作者： S.L.Choi E.S.Lee a.ko H.J.Park S.B.Park B.I.Choi 柴一桐 Department of Radiology Chung-Ang University Hospital Chung -Ang University College of Medicine

摘要目的确定建立的梯度回波(GRE)和自旋回波-回波平面成像(SE-EPI)序列MR弹性成像(MRE)检查的成功率,并比较2种序列慢性肝病和肝硬化病人呼气期和吸气期

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Searching for QCD critical point with light nuclei

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Nuclear Science and Techniques 2023年第5期34卷 192-195页

作者： Che Ming ko Cyclotron Institute and Department of Physics and Astronomy Texas A&M UniversityCollege StationTexas 77843‑3366USA

Density fluctuations and correlations due to a first-order quark-gluon plasma to hadronic matter phase transition and its critical end point,if they remain present after the hadronic evolution in a heavy ion collisions,can lead to an enhanced production of light nuclei in these *** would then result in a non-monotonic collision energy dependence of the yield ratio NtNp∕Nd2of proton number Np,deuteron number Nd,and triton number *** of this yield ratio as a function of collision energy thus provides the possibility to probe the equation of state of strong-interaction matter and its phase diagram.

关键词： critical collision light

Grade zero part of forced graded algebras

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Science China Mathematics 2018年第2期61卷 269-286页

作者： Hankyung ko Mathematisches Institut Universitt Bonn

This paper concerns a certain subcategory of the category of representations for a semisimple algebraic group G in characteristic p, which arises from the semisimple modules for the corresponding quantum group at a p-th root of unity. The subcategory, thus, records the cohomological difference between quantum groups and algebraic groups. We define translation functors in this category and use them to obtain information on the irreducible characters for G when the Lusztig character formula does not hold.

关键词： algebraic groups quantum groups cohomology characters

Factors determining changes in the network of marked hiking trails in the Sudetes

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Journal of Mountain Science 2024年第4期21卷 1075-1099页

作者： Krzysztof koŁODZIEJCZYK Department of Regional Geography and Tourism Institute of Geography and Regional DevelopmentFaculty of Earth Sciences and Environmental ManagementUniversity of WroclawNo.1Uniwersytecki Square50-137 WroclawPoland

Hiking trails are a basic type of tourist infrastructure,which,on the one hand,make areas available for tourist traffic,and on the other hand,can contribute to the protection of the natural environment(if they are well designed and maintained).Owing to the variety of performed functions,their designation is determined by several factors:natural,technical,economic,*** of trails change *** aim of this article is to determine exactly what factors influence transformations within the hiking trail networks and what is their *** this end,three study areas in the Sudetes were analysed:one on the Polish side of the Sudetes-the Table(Stołowe)Mountains,and two on the Czech side-the rock town near the village of Sloup vČechách and the central part of Zlatohorská*** analysis of changes in the shape of the networks over time was carried out,as well as surveys of institutions that were responsible for or influenced these *** areas are characterised by a significant level of changes in the trail *** the factors influencing these changes,the tourist attractiveness of the area,the resilience of the environment,the intensity of tourism traffic,the environmental transformations associated with it,the history of tourism development and land ownership changes should be considered the most *** each stage of forming networks,the key factor should be tourists’needs,including the desire to escape the urbanised *** this reason,trails should avoid roads with artificial(hard)surfaces and heavy automobile traffic.

关键词： Hiking trails Trail networks Graphs Tourist traffic Sudetes

Nanomaterial-based optical indicators: Promise, opportunities, and challenges in the development of colorimetric systems for intelligent packaging

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Nano Research 2019年第3期12卷 489-500页

作者： Nattinee Bumbudsanpharoke Seonghyuk ko Laboratory of Nano-Enabled Packaging and Safety Department of Packaging Yonsei University 1 Yonseidaegil Wonju-si Gangwon-do 26493 Republic of Korea

The market and the future trends of smart packaging show a tendency towards a continuous increase. Several reports have revealed about the increase of consumer concern for food quality and safety, which gives rise to the demand of intelligent packaging. Nano-enabled food packaging has attracted considerable interest and driven a variety of potential applications in the intelligent packaging. The presence of nanomaterials as nanodevices or nanosensors has been recognized as a part of the modern intelligent packaging for monitoring the condition of packaged food or the environment surrounding the product. Among of nanosensors, optical indicator has been widely applied in the market due to the convenient and easy to use. The utilization of nanomaterial such as metal nanoparticles or photonic nanocrystals shows superior performance in novel communicative functions than the traditional colorimetric indicator because of their unique optical properties and high surface reactivity. This review focuses exclusively on ongoing scientific research and recent technological breakthroughs related to nanotechnology-derived colorimetric indicators. The challenges of their application are highlighted and discussed to provide adequate information for future development.

关键词： nano material colorimetric indicator optical property intelligent packaging

Unimodal Sequences of Gorenstein Ideals of Codimension 4

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Acta Mathematica Sinica,English Series 1998年第4期14卷 563-568页

作者： Hyoung J. ko Department of Mathematics. Yonsei University 134 Shinchon-dong Seodaemun-gu. Seoul Korea 120-749

We present Gorenstein ideals of condimension 4 which have unimodal Hilbert functions.

关键词： k-configuration Hilbert function Minimal free resolution Gorenstein ideal of codimension 4