检索结果-南通市图书馆

structural, mechanical and corrosion properties of CNT-304 stainless steel nanocomposites

在线全文

学校读者我要写书评

暂无评论

Progress in Natural science:Materials International 2019年第5期29卷 595-602页

作者： A.V.Radhamani Hon chung Lau s.Ramakrishna Department of Civil and Environmental Engineering National University of Singapore Department of Mechanical Engineering Centre for Nanofibers and Nanotechnology National University of Singapore

In this work, a systematic investigation was performed on the structural, mechanical and corrosion properties of CNT incorporated 304 stainless steel. Various concentrations of CNT from 0.5 to 4 wt% were incorporated into the 304 stainless steel matrix to investigate the feasibility of fabrication and enhancement of strength and other material properties. The fabrication of CNT-steel composite was achieved through a spark plasma sintering process at a sintering temperature of 800℃. Raman and morphological studies confirmed that the CNT structure was retained in the sintered pellets. Optimum performance was found at 0.5 wt% CNT giving a Vickers hardness of 351 Hv and compressive yield strength of 404 MPa which were 5.5 and 2.0 times, respectively, those of pristine steel. Corrosion studies with 3.5 wt% Na Cl solution revealed a slight increase in the corrosion rate for CNT dispersed samples.

关键词： Carbon nanotube 304-stainless steel spark plasma sintering Hardness Compression Corrosion

A facile route to tungsten oxide nanomaterials with controlled morphology and structure

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Particuology 2011年第5期9卷 517-521页

作者： Hsuan-Ching Lin Cherng-Yuh su Zhong-Kun yang chung-Kwei Lin Keng-Liang Ou Institute of Atomic and Molecular sciences Academia Sinica Taipei Taiwan China Institute of ManufacturingEngineering National Taipei University of Technology Taipei 106 Taiwan China Department of Materials science and Engineering Feng-Chia University Taichung 407 Taiwan China Department of Oral Medicine Taipei Medical University Taipei 110 Taiwan China

Various tungsten oxide-based nanomaterials have been prepared by a modified plasma arc gas condensation technique without the use of catalysts or substrates. These products could be obtained by controlling the processing parameters during experiment. All the as-obtained samples were characterized by field emission gun scanning electron microscopy, high-resolution transmission electron microscopy, and X- ray diffraction techniques. The results revealed that as-prepared tungsten oxide nanomaterials （WO3, W190s5 and WsO14） with different phases and morphologies could be obtained by decreasing the oxygen content in the chamber. In addition, W18049 nanotubes and nanorod bundles were fabricated by con- trolling the Ar/O2 ratio under He plasma gas. W18Q9/TiO2 core-shell nanoparticles were also prepared by evaporating a dual target. The experimental results showed that the present technique is unique and feasible for the fabrication of nanomaterials for use in different applications.

关键词： Plasma arc gas condensation Titanium oxide Tungsten oxide Nanoparticle Nanorods

Nuclear mass predictions based on a deep neural network and finite-range droplet model(2012)

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第2期48卷 112-123页

作者：姚道驄梁豪兆李曉菁 Department of Physics The University of Hong KongHong Kong 999077China Department of Physics Graduate School of ScienceThe University of TokyoTokyo 113-0033Japan Interdisciplinary Theoretical and Mathematical sciences Program(iTHEMs) RIKENWako 351-0198Japan

A neural network with two hidden layers is developed for nuclear mass prediction,based on the finiterange droplet model(FRDM12).Different hyperparameters,including the number of hidden units,choice of activation functions,initializers,and learning rates,are adjusted explicitly and *** resulting mass predictions are achieved by averaging the predictions given by several different sets of hyperparameters with different regularizers and seed *** can provide not only the average values of mass predictions but also reliable estimations in the mass prediction *** overall root-mean-square deviations of nuclear mass are reduced from 0.603 MeV for the FRDM12 model to 0.200 MeV and 0.232 MeV for the training and validation sets,respectively.

关键词： nuclear mass machine learning deep neural network

致力保障個人资料私隱,促進大灣區之互聨互通

在线全文

学校读者我要写书评

暂无评论

中国法律（中英文版） 2024年第1期 66-68,152-154页

作者：鐘麗玲不详

自回歸祖國以来,香港地區在國家的大力支持下成功落實“一國兩制”,“一國兩制”原则爲香港地區長期的繁榮稳定及經濟體系提供制度上最佳的保障。

关键词：制度保障互通

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

翼腭缝宏观解剖及其发育模式研究

上海交通大学学报（医学版） 2024年第8期44卷 944-950页

作者：章文益郑美里谢羽番江凌勇上海交通大学医学院附属第九人民医院口腔颅颌面科·正颌正畸中心上海交通大学口腔医学院国家口腔医学中心国家口腔疾病临床医学研究中心上海市口腔医学重点实验室上海市口腔医学研究所中国医学科学院口腔颌面再生医学创新单元上海200011

目的·利用锥形束计算机断层扫描(cone-beam computed tomography,CBCT)技术分析中国人群中翼腭缝(pterygopalatine suture,PPs)的解剖及宏观形态特征,并初步探讨其发育模式及其与矫正上颌发育不足之间的关联。方法·纳入2023年7月—8... 详细信息

目的·利用锥形束计算机断层扫描(cone-beam computed tomography,CBCT)技术分析中国人群中翼腭缝(pterygopalatine suture,PPs)的解剖及宏观形态特征,并初步探讨其发育模式及其与矫正上颌发育不足之间的关联。方法·纳入2023年7月—8月在上海交通大学医学院附属第九人民医院拍摄的134例CBCT影像资料,根据年龄分为6组。以PPs标志点为依据,计算得出PPs整体的横向位置(transverse position of PPs,X_(PPs)),PPs整体的矢状向位置(sagittal position of PPs,Y_(PPs)),以及PPs的锥突嵌入角(insertion angle of PPs,IAP)、锥突嵌入宽度(insertion width of pyramidal process,IWP)和锥突嵌入深度(insertion depth of pyramidal process,IDP),并通过多平面观察确定翼上颌联合情况。采用回归分析评估各参数与年龄、性别的相关性,并通过两两比较确定参数变化的稳定年龄段。采用配对t检验及配对χ^(2)检验分析双侧参数的差异性。结果·Y_(PPs)、IDP与年龄无显著相关性,而X_(PPs)、IAP、IWP、翼上颌连接的发生率均与年龄呈显著正相关(Ps)中显著,男性大于女性(Ps)在组1(6岁≤年龄s)及IDP未表现出明显改变,上颌骨与翼突趋于融合。PPs整体横向位置在12岁左右趋于稳定,而IAP及IWP持续增长,至15岁左右达到稳定且翼腭缝锥突嵌入翼切迹的方向偏向矢状向。

关键词：翼腭缝形态学生长发育上颌扩弓上颌前方牵引

Penile prosthesis implant in the special populations:diabetics,neurogenic conditions,fibrotic cases,concurrent urinary continence surgery,and salvage implants

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2020年第1期22卷 39-44页

作者： Eric chung AndroUrology Centre BrisbaneQLD 4000Australia University of Queensland Princess Alexandra HospitalBrisbaneQLD 4000Australia Macquarie University Hospital SydneyNSW 2109Australia

Penile prosthesis implant(PPI)remains an effective and safe treatment option for men with erectile dysfunction(ED).However,PPI surgery can be associated with a higher risk of complications in certain *** article provides a critical review of relevant publications pertaining to PPI in men with diabetes,significant corporal fibrosis,spinal cord injury,concurrent continence surgery,and complex salvage *** discussion of each category of special populations includes a brief review of the surgical challenges and a practical action-based set of *** specific patient populations posed considerable challenges in PPI surgery,strict pre-and postoperative management coupled with safe surgical practice is a prerequisite to achieving excellent clinical outcomes and high patient satisfaction rate.

关键词： continence surgery diabetes erectile dysfunction penile prosthesis implant Peyronie’s disease priapism salvage surgery spinal cord injury

A cross-sectional study into the correlation of common household risk factors and allergic rhinitis in Taiwan's tropical environment

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

亚太热带医药杂志：英文版 2017年第2期10卷 127-133页

作者： Yu-Hao Wang Yu-Chieh Wang Pi-Hsiung Wu Lan Hsu chung-yang Wang chung-Ren Jan Hsing-Hao su Department of Microbiology and Immunology University of Rochester Department of Biology Wake Forest University Department of Otorhinolaryngology Head and Neck SurgeryKaohsiung Veterans General Hospital Department of Dermatology Kaohsiung Veterans General Hospital Anshing Clinic Department of Medical Education and Research Kaohsiung Veterans General Hospital

Objective:To discuss the effect of lesser-known potential risk factors,such as bedroom showers,on the prevalence of allergic ***:A cross-sectional,population-based study was performed using both survey and fungal culturing in southern *** were 998 participants enrolled in the survey,and 513 sets of fungal culture *** score for allergic rhinitis(sFAR) more than 7,the patient was defined to have allergic *** of allergic rhinitis were calculated as odds ratios for various predicted risk factors by logistic *** between predicted risk factors and fungal level were examined with linear ***:The adjusted odds ratio of frequently using bedroom shower to having allergic rhinitis was 1.572(95% confidence interval:1.090-2.265),and 0.962 for people with older age to have AR(95% confidence interval:0.949-0.976).As to the 24-hour fungal level,the standardized coefficient was 0.254 for frequent use of bedroom shower,and 0.106 for window open ***:Use of bedroom shower is a potential risk factor for allergic rhinitis development.

关键词： Allergic rhinitis Allergens Environment Fungi Indoor air quality

security Analysis of Application Layer Protocols on Wireless Local Area Networks

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

Journal of shanghai Jiaotong university(science) 2011年第5期16卷 586-592页

作者：杨明豪 Department of Information & Computer Engineering Chung Yuan Christian University

This paper aims at analyzing the security issues that lie in the application layer (AL) protocols when users connect to the Internet via a wireless local area network (WLAN) through an access point. When adversaries launch deauthentication flood attacks cutting users' connection, the connection managers will automatically research the last access point's extended service set identifier (EssID) and then re-establish connection. However, such re-connection can lead the users to a fake access point with the same EssID set by attackers. As the attackers hide behind users' access points, they can pass AL's authentication and security schemes, e.g. secure socket layer (ssL). We have proved that they can even spy on users' account details, passwords, data and privacy.

关键词： man-in-the-middle (MITM) attacks session hijacking wireless local area network (WLAN)

Identification of glycerophospholipid fatty acid remodeling by using mass spectrometry imaging in bisphenol s induced mouse liver

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2018年第8期29卷 1281-1283页

作者： Chao Zhao Peisi Xie Ti yang Hailin Wang Arthur Chi Kong chung Zongwei Cai state Key Laboratory of Environmental and Biological Analysis Department of Chemistry Hong Kong Baptist University state Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences

Bisphenol A（BPA） plays an important role in metabolic disorders. As a major alternative to BPA, it is unclear whether the exposure of bisphenol s（BPs） may result in lipidome disturbance. Using a mouse model, we investigated the effects of BPs exposure on metabolism and spatial distribution of lipids by using lipidomics analysis and matrix-assisted laser desorption/ionization（MALDI）-mass spectrometry imaging（MsI） in mouse liver tissues. Lipid metabolites displayed significant up-regulation in phosphatidylethanolamines（PE）, lysophosphatidylcholines（LPC）, lysophosphatidylethanolamines（LPE） and lysophosphatidylserine（LPs） as well as remarkable down-regulation in phosphatidylcholine（PC） and phosphatidylserine（Ps） in mouse liver after the exposure at 100 m g BPs/kg body weight/*** obtained results indicated that the lipidome of liver was perturbed significantly in glycerophospholipid（GP） fatty acid remodeling pathway upon the BPs exposure. We applied MsI and multivariate statistical analysis to evaluate the abundance variation of lipid markers in BPs-treated liver sections and to compare with the analytical results from olive oil-treated liver sections. Differential structural lipids with up-regulated PE（20：1/20：4）, LPC（20：4）, LPE（20：4）, LPs（33：4） and down-regulated PC（20：4/22：6）and Ps（18：0/22：6）, which were related to GP fatty acid remodeling, changed and co-localized in the liver sections. To explore the cause of variation of lipid abundance, expression of enzymes that regulate biosynthesis and metabolism of fatty acid in liver tissues were analyzed. Consistent with the results of liver lipidome and spatial distribution, a decrease in hepatic expression of LPC acyltransferase 1（LPCAT1）,LPCAT2 and LPs acyltransferase and an increase expression of LPCAT3, LPCAT4, LPE acyltransferase 1（LPEAT1）, LPEAT2 and phospholipase A2 s were observed in GP fatty acid remodeling pathway. Our results demonstrated that exposure to BPs could induce the GP fatty acid remodeling, which m

关键词： Lipidomics MALDI-MsI Bisphenol s Bisphenol A Mouse liver