检索结果-南通市图书馆

CORROSION AND MECHANICAL PROPERTIES OF Ti_3Al-Nb-Mo COMPOSITES FOR BIO-AND ENVIRONMENTAL MATERIALS PREMRED By SELF-PROMGATING HIGH TEMPERATURE REACTION

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2002年第2期15卷 149-153页

作者： y.choi N.I.Baik H.D.Cho S.I.Hong Department of Metallurgical and Materials Engineering Sunmoon University#100 Kalsan-RiTangjeoung-MyunAsanChungnam336-840Korea Department of Environmental Engineering Sunmoon University#100 Kalsan-RiTangjeoung-MyunAsanChungnam336-840Korea Department of Metallurgical Engineering Chungnam National UniversityDaejeon305-764Korea Manuscript received 31 July 2001

Ti3 AL-Nb-Mo composites were prepared by SHS using initial powder mixtures of Ti-Al-Nb-Mo and their corrosion and mechanical properties were studied to develop bioand environmental materials. The composites reached 99.8% of theoretical density after the direct consolidation. The composites shows equiaxed primary a2 in a matrix of fine secondary a2 plates and ordered 82 (Bo) forming a basket weave structure. The strain rate sensitivity (m = dlnσ/dlne) at 2% strain is 0.008. Corrosion potential and corrosion rate of the composites formed by SHS were -151. 5m VSHE and 5. 72× 10^(-8)A/cm2 for Ti3 Al-10Nb-1. 5Mo and - 138.4m VSHE and 4. 12×10^(-8)cm2 for Ti3 Al-12Nb-1.5Mo in a 50% NaOH-10%FeCI3 solution, respectively. Corrosion resistance decreased with niobium content in the composites and chloride content in the aqueous solution. Selective corrosion of a2 phase in a matrix occurred in the corrosion environment which suggests that the corrosion potential and rate changes are related to the niobium content and Q2 phase in a matrix.

关键词： Ti3 Al alloy corrosion strength SHS

Remote Observations in China’s Ramsar Sites: Wetland Dynamics, Anthropogenic Threats, and Implications for Sustainable Development Goals

在线全文

学校读者我要写书评

暂无评论

Journal of Remote Sensing 2021年第1期2021卷 319-331页

作者： D.Mao Z.Wang y.Wang C.-y.choi M.Jia M.V.Jackson R.A.Fuller Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China National Earth System Science Data Center BeijingChina Department of Natural Resources Sciences University of Rhode IslandKingstonRI 02881USA School of Environmental Science and Engineering College of EngineeringSouthern University of Science and TechnologyShenzhen 518055China School of Biological Sciences The University of QueenslandBrisbaneAustralia

The Ramsar Convention on Wetlands is an international framework through which countries identify and protect important *** Ramsar wetlands are under substantial anthropogenic pressure worldwide,and tracking ecological change relies on multitemporal data ***,we evaluated the spatial extent,temporal change,and anthropogenic threat to Ramsar wetlands at a national scale across China to determine whether their management is currently *** analyzed Landsat data to examine wetland dynamics and anthropogenic threats at the 57 Ramsar wetlands in China between 1980 and *** reveal that Ramsar sites play important roles in preventing wetland loss compared to the dramatic decline of wetlands in the surrounding ***,there are declines in wetland area at 18 Ramsar *** those,six lost a wetland area greater than 100 km^(2),primarily caused by agricultural *** expansion of anthropogenic land covers occurred within 43(75%)Ramsar sites,and anthropogenic threats from land cover change were particularly notable in eastern *** pond expansion and Spartina alterniflora invasion were prominent threats to coastal Ramsar *** observations within China’s Ramsar sites,which in management regulations have higher levels of protection than other wetlands,can help track progress towards achieving United Nations Sustainable Development Goals(SDGs).The study findings suggest that further and timely actions are required to control the loss and degradation of wetland ecosystems.

关键词： Sustainable threat wetland

Effects of Dietary Proteins of Proso, Japanese and Korean Foxtail Millets on Lipid Metabolism and Type-2 Diabetes in Rats and Mice

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

食品科学 2005年第5期26卷 220-224页

作者： Naoyuki Nishizawa y-y.choi y.Miyakoshi D.Sato T.Togawa T.Nagasawa y.Ito M Watanabe M.Sato M-R choi Iwate University Department of Agro-BiosciencesFaculty of AgricultureMoriokaIwate 020-8550Japan National Agricultural Research Center for Tohoku Reg. MoriokaIwateJapan yosu National University YeosuRepublic of Korea

Summary We examined the effects of dietary Japanese millet protein(JMP)and Korean foxtail millet protein(KFMP)on lipid metabolism and type 2 diabetes in rats and *** type 2 diabetic rats were fed with JMP for 20 days,plasma glucose levels lowered,whereas those of HDL-cholesterol and adiponectin rose significantly compared to the control *** when type 2 diabetic mice were fed with KFMP for 20 days,plasma levels of insulin lowered greatly,whereas those of HDL-cholesterol and adiponectin rose remarkably compared to control *** the role of adiponectin,insulin and HDL-cholesterol in diabetes and atherosclerosis or obesity,it seemed likely that JMP and KFMP might improve insulin sensitivity and cholesterol metabolism through an increase in adiponectin ***,these proteins might serve as another beneficial food component in obesity-related dis-eases such as type 2 diabetes and cardiovascular diseases.

关键词： JMP Japanese

微钙化和瘤周水肿预测接受新辅助化疗的Luminal型乳腺癌病人的生存结果

在线全文

学校读者我要写书评

暂无评论

国际医学放射学杂志 2022年第5期 605-606页

作者： B.R.Kwon S.U.Shin S.y.Kim y.choi N.Cho S.M.Kim 文凤

摘要对于接受新辅助化疗（NAC）的Luminal型乳腺癌病人的影像学表现与生存率的关系知之甚少。目的确定影像学（MRI、US和乳腺X线摄影）和临床病理变量在预测接

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

供应商关系管理:一种实施框架

中国采购调查报告与供应链最佳实践案例汇编

中国采购调查报告与供应链最佳实践案例汇编 2012年 487-529页

作者： Robert M.Monczka Thomas y.choi yusoon Kim 李帅刘同 CAPS研究中心亚利桑那州立大学商学院乔治亚南方大学管理、市场与物流学院北京物资学院上海外国语大学英语学院

一、综述、调查研究基础与分析方法(一)综述在过去的20年里,供应商运作关系以及它们对公司绩效所作贡献的重要性已成为大家不断讨论的话题。某些公司已经形成一种意识,即供应商和有效的关系对于公司的绩效来说是很关键的。在其他公司努...

一、综述、调查研究基础与分析方法(一)综述在过去的20年里,供应商运作关系以及它们对公司绩效所作贡献的重要性已成为大家不断讨论的话题。某些公司已经形成一种意识,即供应商和有效的关系对于公司的绩效来说是很关键的。在其他公司努力将工作的重点提升到与供应商间运作关系的改善上时,仍有一些公司限制或毫不改善它们的运作关系。此外,走在构建有效和合作性供应商运作关系前线的许多公司,随后可见它们的关系恶化到了敌对的水平。例如,在五年的时间里,IBM公司将其20世纪90年代早期的那种落后的、距离型的供应商关系,发展到了如今先进的、有效的供应商关系。相反,克莱斯勒公司在20世纪90年代拥有卓越的供应商运作关系,但在21世纪中期随着与戴姆勒公司的合并以及后来出售给Cerebus,这种关系就演变成了糟糕的行业关系。在20世纪80年代后期到20世纪90年代早期,福特公司在他们的供应商运作关系恶化之前就已经拥有了非常好的关系。福特公司将已经实施的商业框架整合到改善供应商运作关系之中。

关键词：

Promising therapeutic potential of tumor suppressor microRNAs for malignant pleural mesothelioma

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Cancer Metastasis and Treatment 2022年第1期8卷 91-101页

作者： Shivani Dixit Agnes y.choi Anand Singh Karthik Pittala Nathan Pruett Chuong D.Hoang Thoracic Surgery Branch National Cancer InstituteNational Institutes of HealthBethesdaMD 20892USA

Malignant pleural mesothelioma(MPM)is an aggressive and recalcitrant surface neoplasm that defies current multimodality ***(miRNAs)are small noncoding RNAs that epigenetically regulate multiple gene networks and cellular *** cancer,miRNA dysregulation is associated with tumorigenesis,with tumor suppressor miRNAs underexpressed or lost,while oncogenic miRNAs are ***,miRNAs have emerged as potential therapeutic *** loss of tumor suppressors predominates the pathophysiology of MPM,re-expressing tumor suppressor miRNAs could be an effective therapeutic *** review highlights the most promising MPM-specific tumor suppressor miRNAs that could be developed into novel therapeutics,the supporting data,and what is known about their molecular mechanism(s).

关键词： Malignant pleural mesothelioma microRNA tumor suppressor therapeutic

对化疗耐受非小细胞肺癌的突变分析而进行的重复活检:充分性和并发症

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 2013年第1期 80-81页

作者： H.J.yoon H.y.Lee K.S.Lee y.choi M.Ahn K.Park 柴超 Department of Radiology and Center for Imaging Science Samsung Medical CenterSungkyunkwan University School of Medicine50 Ilwon-DongKangnam-KuSeoul 135-710Korea

目的对于先前化疗耐受的非小细胞肺癌病人,评价为突变分析而进行重复活检的可行性和安全性。材料与方法这项前瞻性研究获得单位伦理委员会批准,并取得所有病人的知情同意书。选择126例对常规化疗或表皮生长因子受体(EGFR)-酪氨酸激酶抑... 详细信息

目的对于先前化疗耐受的非小细胞肺癌病人,评价为突变分析而进行重复活检的可行性和安全性。材料与方法这项前瞻性研究获得单位伦理委员会批准,并取得所有病人的知情同意书。选择126例对常规化疗或表皮生长因子受体(EGFR)-酪氨酸激酶抑制剂耐受的非小细胞肺癌病人,对其中94例病人[男31例,女63例,(57±10.3)岁]进行重复活检。32例病人在严格观察胸部CT影像后因各种原因被排除。采用C臂锥形束CT导向进行经皮胸穿肺活检。评价重复活检的技术成功率和进行突变分析的标本充足率。记录任何与活检相关的并发症。结果活检的技术成功率为100%。94例病人中的75例(80%)标本已足以进行突变分析。75例标本中,35例进行了EGFR突变检测,34例进行了间变性淋巴瘤激酶(ALK)基因重组检测,6例两者都进行。结果显示,20例EGFR光敏突变(外显子19或21)为阳性,5例出现EGFRT790M突变,而11例发现间变性淋巴瘤激酶基因重组。94例病人中13例(14%)出现术后并发症。结论当采用严格的CT标准进行操作时,对先前进行化疗的非小细胞肺癌病人进行突变分析时,重复活检是可行的,大约4/5的病人样品足够进行基因分析,而并发症的发生率可以接受。

关键词：化疗耐受突变分析标本基因重组肺癌病人间变性淋巴瘤激酶并发症并发病疾病

Development of vehicle-recognition method on water surfaces using LiDAR data:SPD^(2)(spherically stratified point projection with diameter and distance)

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第6期36卷 95-104页

作者： Eon-ho Lee Hyeon Jun Jeon Jinwoo choi Hyun-Taek choi Sejin Lee The Department of Mechanical Engineering Kongju National University1223-24 Cheonan-daeroCheonan 31080Republic of Korea Ocean System Engineering Research Division Korea Research Institute of Ships and Ocean Engineering(KRISO)Daejeon 34103Republic of Korea The Division of Mechanical&Automotive Engineering Kongju National University1223-24 Cheonan-daeroCheonan 31080Republic of Korea

Swarm robot systems are an important application of autonomous unmanned surface vehicles on water *** monitoring natural environments and conducting security activities within a certain range using a surface vehicle,the swarm robot system is more efficient than the operation of a single object as the former can reduce cost and save *** is necessary to detect adjacent surface obstacles robustly to operate a cluster of unmanned surface *** this purpose,a LiDAR(light detection and ranging)sensor is used as it can simultaneously obtain 3D information for all directions,relatively robustly and accurately,irrespective of the surrounding environmental *** the GPS(global-positioning-system)error range exists,obtaining measurements of the surface-vessel position can still ensure stability during platoon *** this study,a three-layer convolutional neural network is applied to classify types of surface *** aim of this approach is to redefine the sparse 3D point cloud data as 2D image data with a connotative meaning and subsequently utilize this transformed data for object classification ***,we have proposed a descriptor that converts the 3D point cloud data into 2D image *** use this descriptor effectively,it is necessary to perform a clustering operation that separates the point clouds for each *** developed voxel-based clustering for the point cloud ***,using the descriptor,3D point cloud data can be converted into a 2D feature image,and the converted 2D image is provided as an input value to the *** intend to verify the validity of the proposed 3D point cloud feature descriptor by using experimental data in the ***,we explore the feasibility of real-time object classification within this framework.

关键词： Object classification Clustering 3D point cloud data LiDAR(light detection and ranging) Surface vehicle

Synthetic brochosomes:Design,synthesis,and applications

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第2期17卷 734-742页

作者： Lin Wang Jinsol choi Tak-Sing Wong Department of Mechanical Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA Materials Research Institute The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Biomedical Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA

Brochosomes,which are nanoscopic buckyball-shaped granules produced by leafhoppers,are one of the most intricate structures discovered in *** functions of brochosomes have been proposed but only a few have been experimentally validated due to the challenge of fabricating their synthetic *** in micro-and nanofabrication have recently led to the emergence of synthetic brochosomes,opening up new possibilities for innovative *** review explores the early discovery of natural brochosomes and their geometrical features,followed by the recent progress in fabricating synthetic brochosomes and their *** on future applications and challenges in the scalable manufacturing of synthetic brochosomes are discussed.

关键词： synthetic brochosomes leafhopper antireflection superhydrophobicity surface-enhanced Raman scattering photocatalyst energy harvesting