检索结果-南通市图书馆

Journal of Magnesium and Alloys 2021年第5期9卷 1583-1593页

作者： V.E.Bazhenov A.V.Koltygin M.C.sung s.h.park Yu.V.Tselovalnik A.A.stepashkin A.A.Rizhsky M.V.Belov V.D.Belov K.V.Malyutin National University of science and Technology“MIsis” Leninskiy pr.4Moscow 119049 Russia LG Electronics Inc. Yeoui-daeroYeongdeungpo-gu.128LG Twin TowerSeoul 07336 Republic of Korea

Magnesium alloys are used in aircraft because of their light ***,for these alloys to be applied in electronic devices,high thermal conductivities are *** high-potential compositions of Mg-Zn-Y-Zr alloys were selected by phase composition and their freezing ranges calculated using Thermo-Calc *** alloys were prepared,and their fluidity,hot tearing susceptibility,mechanical properties,and thermal conductivity were obtained and *** alloy composed of Mg-4 wt%Zn-3 wt%Y-0.3 wt%Zr was selected for further investigation,because of its high thermal conductivity and satisfactory mechanical *** Mg-4 wt%Zn-3 wt%Y-0.3 wt%Zr alloy’s fluidity and hot tearing susceptibility were similar to those of the widespread AZ91 commercial casting magnesium *** influence of a heat treatment regime on the microstructure,thermal conductivity,and mechanical properties of the developed alloy was also *** was established that the room temperature thermal conductivity of the Mg-4 wt%Zn-3 wt%Y-0.3 wt%Zr alloy after aging at 300℃for 5 h was 105 W/m K^(-1).Additionally,the following tensile test results were obtained in aged condition:120 MPa yield strength,200 MPa ultimate tensile strength,and 4%*** utilization of solid solution heat treatment at 520℃for 8 h prior to aging can promote up to 9%increase in *** Mg-4 wt%Zn-3 wt%Y-0.3 wt%Zr casting alloy can be used as a high thermal conductivity material with industrial applications.

关键词： Magnesium alloy Mg-Zn-Y-Zr Thermal conductivity Phase composition Fluidity hot tearing susceptibility

Design of Mg-Zn-si-Ca casting magnesium alloy with high thermal conductivity

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2020年第1期8卷 184-191页

作者： V.E.Bazhenov A.V.Koltygin M.C.sung s.h.park A.Yu.Titov V.A.Bautin s.V.Matveev M.V.Belov V.D.Belov K.V.Malyutin National University of science and Technology“MIsis” Leninskiy pr.4Moscow 119049Russia LG Electronics Inc. Yeoui-daeroYeongdeungpo-gu.128LG Twin TowerSeoul 07336 Republic of Korea

Magnesium alloys are commonly used to produce lightweight *** most magnesium alloys exhibit low thermal conductivities,high thermal conductivities are needed for electronic *** this study,we attempted to develop new magnesium casting alloys with high thermal *** Mg-Zn-si-Ca alloy compositions were chosen using CALPhAD(CALculation of PhAse Diagrams)calculations,and alloy samples were *** fluidity and hot-tearing resistance were *** results indicated that these properties were similar to those of AZ91 *** tests showed that high-pressure die casting could produce Mg-Zn-si-Ca alloys possessing mechanical properties 1.5-3 times higher than those produced via sand *** alloy thermal conductivity was 126 W/mK at room *** corrosion rates of the as-cast samples in NaCl/water solutions were two times higher than that of AZ91.

关键词： Magnesium alloy Thermal conductivity Phase composition Corrosion rate sand casting high-pressure die casting

Omni-functional simultaneous interfacial treatment for enhancing stability and outgassing suppression of lithium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第7期94卷 677-687页

作者： Youbean Lee Chanjoo park Kyoungmin Min Kwangjin park Department of Mechanical Engineering Gachon UniversityGyeonggi-do 13120Republic of Korea Department of Battery Engineering Gachon UniversityGyeonggi-do 13120Republic of Korea school of Mechanical Engineering Soongsil UniversitySeoul 06978Republic of Korea

Ni-rich layered oxides in lithium-ion batteries have problems with gas generation and electrochemical performance reduction due to residual lithium's reaction on the surface with the *** address this issue,in this study,the Acid solvent evaporation(AsE)method has been proposed as a potential method to remove residual lithium while promoting the formation of a new LiNO_(3)-derived coating layer on the cathode *** reduction of residual lithium using the AsE method and the construction of a LiNO_(3)-derived coating layer suppresses gas evolution caused by the side effects of the electrolyte,improves electrochemical performance,and improves thermal stability by facilitating the smooth movement of lithium ***,the structural stability and resistance change due to the LiNO_(3)-derived coating layer effects is guaranteed through cycling and DCIR of the pouch *** a result,compared to Pristine,the capacity retention of coin cells increased by 8%after 100 cycles,and pouch cells increased by 25%after 160 *** addition,after cycling the pouch cell,CO_(2) gas has significantly reduced by about 30%compared to Pristine using gas *** AsE method effectively forms a robust LiNO_(3)-derived coating layer on the cathode active material,which helps minimize electrolyte reactivity,suppress ,CO_(2) emissions,enhance surface structure stability,improve thermal stability,and improveoverallbatteryperformance.

关键词： Lithium-ion batteries Ni-rich NCM Acid solvent evaporation LiNO_(3)-derived coating Gasevolution

在线全文

学校读者我要写书评

暂无评论

单纱纺纱与环锭纱及其织物物理性能的比较

纺织导报 2001年第6期 31-32,34-35页

作者： s.h.park s.J.Kim

探讨了用单纱纺纱技术纺制的精梳毛纱及其织物的物理特性。为达此目的，采用了各种单纱纺纱辊纺制不同的单纱纺纱，并对它们进行测量及与常规环锭纺纱工艺纺制的纱进行比较；分别用单纱纺纱工艺和环锭纺纱工艺按3种加捻系数纺制出短纤... 详细信息

探讨了用单纱纺纱技术纺制的精梳毛纱及其织物的物理特性。为达此目的，采用了各种单纱纺纱辊纺制不同的单纱纺纱，并对它们进行测量及与常规环锭纺纱工艺纺制的纱进行比较；分别用单纱纺纱工艺和环锭纺纱工艺按3种加捻系数纺制出短纤纱，然后将两种工艺纺出的纱在小样机上织成2/2斜纹织物，将坯布精练、烘干、汽蒸，最后罐蒸。然后测量织物的物理性能，根据单纱纺纱工艺纺制的纱的机械特性及成纱原理用KEs-FB系统对这些织物的物理特性加以测量和研究。

关键词：单纱纺精梳毛纱纺纱织物物理性能环锭纺纱

Efficient Object segmentation and Recognition Using Multi-Layer Perceptron Networks

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第1期78卷 1381-1398页

作者： Aysha Naseer Nouf Abdullah Almujally saud s.Alotaibi Abdulwahab Alazeb Jeongmin park Department of Computer science Air UniversityIslamabad44000Pakistan Department of Information systems College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Information system Department Umm Al-Qura UniversityMakkahSaudi Arabia Department of Computer science College of Computer Science and Information SystemNajran UniversityNajran55461Saudi Arabia Department of Computer Engineering Tech University of KoreaGyeonggi-do15073South Korea

Object segmentation and recognition is an imperative area of computer vision andmachine learning that identifies and separates individual objects within an image or video and determines classes or categories based on their *** proposed system presents a distinctive approach to object segmentation and recognition using Artificial Neural Networks(ANNs).The system takes RGB images as input and uses a k-means clustering-based segmentation technique to fragment the intended parts of the images into different regions and label thembased on their ***,two distinct kinds of features are obtained from the segmented images to help identify the objects of *** Artificial Neural Network(ANN)is then used to recognize the objects based on their *** were carried out with three standard datasets,MsRC,Ms COCO,and Caltech 101 which are extensively used in object recognition research,to measure the productivity of the suggested *** findings from the experiment support the suggested system’s validity,as it achieved class recognition accuracies of 89%,83%,and 90.30% on the MsRC,Ms COCO,and Caltech 101 datasets,respectively.

关键词： K-region fusion segmentation recognition feature extraction artificial neural network computer vision

在MR普美显增强下原发性肝癌的LI-RADs分型和预后

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

国际医学放射学杂志 2019年第2期42卷 237-238页

作者： s.h.Choi s.s.Lee s.h.park K.M.Kim E.Yu Y.park 罗浩然(译) 杜明珊(校) Department of Radiology and Research Institute of Radiology University of Ulsan College of MedicineAsan Medical Center88 Olympic-ro 43-gilSongpa-guSeoul 05505South Korea 不详

目的(a)评价各型肝脏影像报告和数据系统(LIRADs)原发性肝癌术后的预后意义;(b)确定2017版LIRADs在MR普美显增强中区分肝细胞肝癌(hCC)、肝内胆管细胞癌(IhCC)和肝细胞-胆管细胞混合型肝癌(chCCCC)方面的作用。

关键词：原发性 LI-RADs MR