检索结果-南通市图书馆

Journal of Materials Science & Technology 2022年第18期113卷 261-270页

作者： Bowen Zhang chuantong chen Takuya Sekiguchi Yang Liu Caifu Li Katsuaki Suganuma The Institute of Scientific and Industrial Research Osaka UniversityIbaraki-shiOsaka 567-0047Japan School of electrical and electronic engineering Tiangong UniversityTianjin 300387China Central Research Center Research and Development DivisionTOPPAN FORMS CO.LTD1-2-6 Owada-choHachioji-shiTokyoJapan School of materials and state key laboratory of optoelectronic materials and technologies Sun Yat-sen UniversityShenzhen 518107China

In this paper,by proposing a novel and low-cost Ag salt paste,a robustly and large-area(35×35 mm^(2))bare Cu to Cu bonding was realized under a low sintering pressure of 0.8 MPa and a low sintering temperature of 300℃ in air atmospheric *** relationship between the bonding strength and microstructure changes of sintered Ag under various bonding conditions was investigated in *** large-area bonded plate exhibits low porosity about 10%and low percentage of voids,which result in ultra-high bonding strength over 58 *** importantly,the introduction of reducing agent formic acid(CH_(2)O_(2))and the low porosity successfully improve the anti-oxidation of novel Ag salt paste during sintering process,result in pure Cu-Ag-Cu *** cross-section of the Ag joints was obtained to explain the bonding pattern,in which Cu was oxidized only at the edge of the sintering interface,and no Cu oxide generated in middle bonding *** development of novel Ag salt paste successfully addresses the energy-intensive process and low bonding strength faced by large-scale sintering,which greatly promotes the high-temperature applications of power device.

关键词： Large-area bonding Anti-oxidation Cu-cu joint Ag salt paste Bonding strength

Oxidation-enhanced bonding strength of Cu sinter joints during thermal storage test

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第20期115卷 251-255页

作者： Yue Gao Jinting Jiu chuantong chen Katsuaki Suganuma Rong Sun Zhi-Quan Liu Shenzhen Institute of Advanced Electronic Materials Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Senju Metal Industry Co. Ltd.Senju Hashido-cho 23Adachi-ku Tokyo 120-8555Japan The Institute of Scientific and Industrial Research(ISIR) Osaka UniversityMihogaoka 8-1IbarakiOsaka 567-0047Japan Shenzhen College of Advanced Technology University of Chinese Academy of SciencesShenzhen 518055China

With the development in next-generation semiconductor power devices,the power devices based on silicon carbide(SiC)and gallium nitride(GaN)are expected to replace the traditional Si-based power devices[1–6].However,the foreseeable harsh operating environment such as heavy thermal-load or extremely temperature cycle required more reliable interconnection technology[4,7-9].

关键词： interconnection thermal bonding

Thermal fatigue behaviors of SiC power module by Ag sinter joining under harsh thermal shock test

在线全文

学校读者我要写书评

暂无评论

China Welding 2022年第1期31卷 15-21页

作者： chen chuantong Zhang Hao Jiu Jinting Long Xu Suganuma Katsuaki Institute of Scientific and Industrial Research Osaka UniversityOsaka 567-0047Japan Senju Metal Industry Co. LtdTokyo 120-8555Japan School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an 710072China

The excellent properties of SiC bring new challenges for the device *** this study,the bonding strength,fracture behaviors and microstructural evolution of micron-porous Ag joint were elevated during thermal cycling(–50 ℃–250 ℃) in SiC/DBC(direct bonding copper) die attachment structure for different *** harsh thermal shock test,the strength of sintered joint deceased gradually with the increase of cycling number,and the value just was half of the value of as-sintered after 1 000 *** of Ag grains was observed in micron-porous joint with the structure inhomogeneity and defects increasing,which were the reasons of the strength *** addition,it was also found that the fracture behavior of sintered joints was changed from ductile deformation of Ag grain to brittle fracture of crack propagation after 1 000 *** study will add the understanding in the mechanical properties of Ag sinter joining and its applications at high temperature.

关键词： power module high-temperature reliability Ag sinter joining low stress structure thermal shock test

基于物体显著性自监督学习的片烟杂物检测方法

在线全文

学校读者我要写书评

暂无评论

烟草科技 2023年第12期56卷 76-83页

作者：王小飞李东方李玉珩陈传通秦皇岛烟草机械有限责任公司河北省066000 山东中烟工业有限责任公司济南卷烟厂济南市250100

为提高片烟杂物识别准确率,将深度学习图像处理方法与聚类算法相结合,提出一种基于物体显著性自监督学习的片烟杂物检测方法。首先利用深度学习网络检测出片烟图像中的显著性目标,再对检测目标特征进行聚类分析并剔除正常物体;然后采用... 详细信息

为提高片烟杂物识别准确率,将深度学习图像处理方法与聚类算法相结合,提出一种基于物体显著性自监督学习的片烟杂物检测方法。首先利用深度学习网络检测出片烟图像中的显著性目标,再对检测目标特征进行聚类分析并剔除正常物体;然后采用基于时间序列的状态累积检测方法确定检测杂物的真实性。结果表明:所建立的两级U-Net模型对片烟杂物检测的平均IoU(Intersection over Union)和MAE(Mean Absolute Error)分别为0.90、0.054,均优于对比的BASNet和U-Net模型;杂物平均识别率达到96.6%,图像处理时间为21 ms/张,能够满足现场检测实时性要求。该方法可为提高片烟杂物分类识别效率提供支持。

关键词：片烟杂物识别深度学习显著性目标检测聚类分析

在线全文

学校读者我要写书评

暂无评论

中国南极陨石的收集、研究与展望

极地研究 2024年第3期36卷 454-472页

作者：夏志鹏杨东亮王潇锐张川统陈宏毅缪秉魁桂林理工大学行星地质演化广西高校重点实验室陨石与行星物质研究中心广西桂林541000 桂林理工大学广西隐伏金属矿产勘查重点实验室广西桂林541000 桂林理工大学有色金属矿产勘查与资源高效利用省部共建协同创新中心广西桂林541004

陨石不仅是地球与宇宙之间联系的纽带,也是揭开太阳系历史、探索宇宙演化的关键钥匙。南极独特的地理条件和冰雪环境使其成为全球发现陨石最多的地区。自1998年在格罗夫山发现第一个陨石富集区以来,中国已收集了12665块陨石,在全球南极... 详细信息

陨石不仅是地球与宇宙之间联系的纽带,也是揭开太阳系历史、探索宇宙演化的关键钥匙。南极独特的地理条件和冰雪环境使其成为全球发现陨石最多的地区。自1998年在格罗夫山发现第一个陨石富集区以来,中国已收集了12665块陨石,在全球南极陨石收集数量中排名第三。本文概述了南极陨石发现历史,揭示了冰盖上陨石富集的独特性,集成了中国在格罗夫山陨石收集方面的成绩,并探讨了陨石的分类工作和最新的研究进展。总结取得成就的同时,也探索收集效率下降、富集区域限制和南极陨石自然“消失”等挑战和问题。最后,面对行星科学的快速发展和中国南极秦岭站建成的大好时机,本文提出了一些未来设想,包括成立南极陨石考察队,以秦岭站和中山站为后勤保障基地,开展横贯南极山脉和查尔斯王子山陨石综合考察,并加强南极陨石科研和科普的协同发展。

关键词：陨石收集与富集区格罗夫山南极

双歧杆菌三联活菌肠溶胶囊对非酒精性脂肪肝患者肝功能及炎症因子的影响

在线全文

学校读者我要写书评

暂无评论

中国药师 2015年第6期18卷 975-977页

作者：郑贤干王教常王益训陈传统黄达栋陈云喜徐贤唑林敏黄孟启苍南县第三人民医院消化内科浙江苍南325804 苍南县第三人民医院检验科浙江苍南325804

目的:探讨双歧杆菌三联活菌肠溶胶囊对非酒精性脂肪肝患者肝功能及炎症因子的影响。方法:非酒精性脂肪肝患者70例随机分为对照组和观察组。两组患者均予常规内科保肝治疗,观察组在此基础上加用双歧杆菌三联活菌肠溶胶囊420 mg,po,tid,连... 详细信息

目的:探讨双歧杆菌三联活菌肠溶胶囊对非酒精性脂肪肝患者肝功能及炎症因子的影响。方法:非酒精性脂肪肝患者70例随机分为对照组和观察组。两组患者均予常规内科保肝治疗,观察组在此基础上加用双歧杆菌三联活菌肠溶胶囊420 mg,po,tid,连用4周。观察并比较两组患者治疗前后肝功能指标和血清超敏C反应蛋白(hs-CRP)、白细胞介素(IL)-6和IL-8水平的变化及安全性。结果:治疗4周后,两组患者ALT、GGT、血清hs-CRP、IL-6和IL-8水平均较前明显下降(P0.05)。结论:双歧杆菌三联活菌肠溶胶囊辅助治疗非酒精性脂肪肝能明显降低血清hs-CRP、IL-6和IL-8水平,抑制肝内炎症及免疫损伤,改善肝功能,且安全性较好。

关键词：非酒精性脂肪肝双歧杆菌三联活菌肠溶胶囊肝功能炎症因子

纳米压痕下单/多层薄膜弹塑性本构的无量纲分析

在线全文

学校读者我要写书评

暂无评论

中国科学：物理学、力学、天文学 2023年第1期53卷 51-61页

作者：龙旭申子怡贾啟普李娇陈传彤刘永超苏昱太西北工业大学力学与土木建筑学院西安710072 大阪大学产业科学研究所日本大阪567-0047

针对薄膜-基体结构特点,本文基于纳米压痕测试所得荷载-位移曲线,从加载阶段的荷载与功的角度出发,将薄膜材料的本构参数(弹性模量、硬化指数、屈服强度)作为荷载-位移曲线的影响参数并对其进行无量纲组合.结合有限元仿真分析结果将无... 详细信息

针对薄膜-基体结构特点,本文基于纳米压痕测试所得荷载-位移曲线,从加载阶段的荷载与功的角度出发,将薄膜材料的本构参数(弹性模量、硬化指数、屈服强度)作为荷载-位移曲线的影响参数并对其进行无量纲组合.结合有限元仿真分析结果将无量纲函数公式化表达,提出适应于单层弹塑性薄膜材料的本构参数求解方法.通过与机器学习算法基于大量压痕数据预测所得本构参数进行对比,验证本文所提出无量纲函数在复现有限元预测结果方面的优势.此外,通过所提出“复合本构参数”的概念,基于本文提出的单层薄膜求解方法,逐层求解未知单层薄膜本构参数,最终确定多层薄膜的本构参数.本文的力学性能研究工作对提高薄膜系统和基于薄膜技术的器件可靠性和寿命具有重大意义.

关键词：薄膜纳米压痕量纲分析弹塑性本构有限元计算

A special unbrecciated granoblastic textured basaltic eucrite meteorite

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2017年第S1期91卷 275-276页

作者： ZHANG chuantong MIAO Bingkui XIE Lanfang XIA Zhipeng chen Hongyi Guangxi Key University’s Laboratory of Planetary Geological Evolution Guilin University of TechnologyGuilin 541004China Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration Guilin University of TechnologyGuilin 541004China Guangxi Scientific Experiment Center of Mining Metallurgy and EnvironmentGuilin University of TechnologyGuilin 541004China

1 Introduction Generally,we can observe varying degree of ophitic texture or sub-ophitic texture in unbrecciated basaltic ***,a few unbrecciated basaltic eucritespossess the special characteristic of crystalloblastic ... 详细信息

关键词： Ca A special unbrecciated granoblastic textured basaltic eucrite meteorite high

The application of halide perovskites in memristors

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2020年第5期41卷 44-59页

作者： Gang Cao chuantong cheng Hengjie Zhang Huan Zhang Run chen Beiju Huang Xiaobing Yan Weihua Pei Hongda chen State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China National–Local Joint Engineering Laboratory of New Energy Photovoltaic Devices Key Laboratory of Digital Medical Engineering of Hebei ProvinceCollege of Electron and Information EngineeringHebei UniversityBaoding 071002China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China

New neuromorphic architectures and memory technologies with low power consumption,scalability and high-speed are in the spotlight due to the von Neumann bottleneck and limitations of Moore’s *** memristor,a two-terminal synaptic device,shows powerful capabilities in neuromorphic computing and information storage *** materials with high defect migration speed and low defect migration barrier are highly promising for high-performance *** perovskite(HP)materials with point defects(such as gaps,vacancies,and inversions)have strong application potential in *** this article,we review recent advances on HP memristors with exceptional ***,the working mechanisms of memristors are ***,the structures and properties of HPs are *** electrical and photonic HP-based memristors are overviewed and *** fabrication methods of HP memristor devices and arrays are described and ***,the challenges in integrating HP memristors with complementary metal oxide semiconductors(CMOS)are briefly *** review can assist in developing HP memristors for the next-generation information technology.

关键词： halide perovskites memristors fabrication methods CMOS

Lunar meteorites: witnesses of the composition and evolution of the Moon

在线全文

学校读者我要写书评

暂无评论

Advances in Polar Science 2014年第2期25卷 61-74页

作者： MIAO Bingkui chen Hongyi XIA Zhipeng YAO Jie XIE Lanfang NI Wenjun ZHANG chuantong Guangxi Scientific Experiment Center of Mining Metallurgy and Environment Guilin University of Technology Key Laboratory of Hidden Metallic Ore Deposits Exploration

Lunar meteorites are fragments of the Moon that escaped the gravity of the Moon following high-energy impacts by asteroids, subsequently fell to Earth. An inventory of 165 lunar meteorites has been developed since the discovery and identification of the first lunar meteorite, ALHA 81005, in 1979. Although the Apollo samples are much heavier in mass than lunar meteorites, the meteorites are still an important sample supplement for scientific research on the composition and history of the Moon. Apart from a small amount of unbrecciated crystalline rocks, the majority of lunar meteorites are breccias that can be classified into three groups： highland feldspathic breccia, mare basaltic breccia, and mingled（including fledspathic and basaltic clasts） breccia. The petrography of lunar rocks suggests that there are a series of rock types of anorthosite, basalt, gabbro, troctolite, norite and KREEP in the Moon. Although KREEP is rare in lunar rocks, KREEP components have been found in the increasing number of lunar meteorites. KREEP provides important information on lunar magmatic evolution, e.g., the VHK KREEP clasts in SaU 169 may represent the pristine lunar magma （urKREEP）. Six launching pairs of lunar meteorites have been proposed now, along with ten possible lunar launching sites. In addition, symplectite is often found in lunar basalts, which is a significant record of shock metamorphism on the lunar surface. Furthermore, isotopic ages and noble gases not only provide information on crystallization processes in lunar rocks and the formation of lunar crust, but also provide insight into shock events on the lunar surface.

关键词： lunar meteorites KREEP rocks KREEP launching pair launching sites