检索结果-南通市图书馆

Sh.ck effects on th. upper limit of th. collision weld process window

在线全文

学校读者我要写书评

暂无评论

Advances in Manufacturing 2024年第2期12卷 365-378页

作者： Blake Barnett Anupam Vivek glenn Daeh. Department of Materials Science and Engineering The Ohio State UniversityColumbusOH43210USA Army Research.Directorate Army Research LaboratoryDEVCOMAberdeen Proving GroundHarfordMD21005USA

Th. maximum flyer impact velocity based on a dynamic solidification cracking mech.nism is proposed to describe th. upper limit of collision welding process ***,th. upper limit of th. weld window is governed by th. evolution of dynamic stresses and temperatures at th. weld *** formulations for th. upper limit of th. collision weld window assume th.t both.th. flyer and target are made of th. same material and approximate stress propagation velocities using th. acoustic velocity or th. sh.ar wave velocity of th. weld ***,collision welding fundamentally depends on th. impacts th.t generate sh.ckwaves in weld members,wh.ch.can dominate th. stress propagation velocities in th.n weld ***,th.s study proposes an alternative weld window upper limit th.t approximates stress propagation using sh.ck velocities calculated from modified 1-D Rankine-h.goniot *** sh.ck upper limit is validated against th. experimental and simulation data in th. collision welding literature,and offers a design tool to rapidly predict more accurate optimal collision weld process limits for similar and dissimilar weld couples compared to existing models with.ut th. cost or complexity of h.gh.fidelity simulations.

关键词： Collision welding Solid-state welding Sh.ck impact Weld process modelling Explosive bonding Laser impulse welding(LIW)

Advances in teleoph.h.lmology and artificial intelligence for diabetic retinopath. screening:a narrative review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Annals of Eye Science 2024年第2期9卷 24-37页

作者： Tanvi Ch.ksh. Maria Jessica Cruz Jonath.n Ross glenn Yiu Tsch.nnen Eye Institute Department of OphthalmologyUniversity of CaliforniaDavis HealthSacramentoCAUSA Department of Research College of MedicineCalifornia Northstate UniversityElk GroveCAUSA

Background and Objective:Advances in teleoph.h.lmology and artificial intelligence(AI)for diabetic retinal screening is of growing public h.alth.***,only 30–40%of patients with.diabetes adh.re to recommended diabetes screening *** enh.nce early detection and reduce vision th.eatening complications,th.re h.s been a growing number of teleoph.h.lmology programs and novel AI algorith.s with.th. aim to improve eye care *** purpose of th.s review is to assess current literature on teleoph.h.lmology and AI for use in diabetic retinopath.(DR)screening,and to discuss advances and barriers to th.se innovative ***:Literature review involving teleoph.h.lmology and AI for DR screening,with.focus on th. past *** Content and Findings:Teleoph.h.lmology h.s demonstrated th. ability to increase DR screening rates,enable earlier eye care access,and reduce h.alth.are *** AI-based DR screening programs appear accurate and effective,but detection of oth.r ocular path.logies is still under development and not yet approved in th. United ***,tech.ological,financial,and legal barriers limit widespread adoption and long-term sustainability of teleoph.h.lmology ***:Th. use of teleoph.h.lmology and AI algorith.s expands eye care access and h.lps prevent vision loss from DR and potentially oth.r sigh. th.eatening *** in th. process utilized for arriving at a particular diagnosis or decision to refer,often referred to as th.“black box”,remains a multifaceted issue with.n th. field of telemedicine for developing trust and improving patient-centered outcomes.

关键词： Teleoph.h.lmology artificial intelligence(AI) diabetic retinopath.(DR) screening public h.alth

Antisense oligonucleotides provide optimism to th. th.rapeutic landscape for tauopath.es

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第3期20卷 803-804页

作者： glenn A.h.rris Lauren R.h.rsch.eld Rainwater Ch.ritable Foundation Fort WorthTXUSA

Tauopath.es are a group of neurodegenerative diseases ch.racterized by abnormal metabolism of th. misfolded tau protein. Tau is encoded by th. microtubule-associated protein tau gene(MAPT) and can be classified as eith.r 3-repeat(3R) or 4-repeat(4R) based on th. number of repeat domains from alternative splicing of exon 10 of th. MAPT gene.

关键词： tau metabolism diseases

Fully integrated and broadband Si-rich.silicon nitride wavelength.converter based on Bragg scattering intermodal four-wave mixing

在线全文

学校读者我要写书评

暂无评论

Ph.tonics Research 2024年第3期12卷 I0001-I0010页

作者： VALERIO VITALI Th.LÍA DOMÍNGUEZ BUCIO h.O LIU JOSÉMANUEL LUQUE GONZÁLEZ FRANCISCO JURADO-ROMERO ALEJANDRO ORTEGA-MOÑUX glenn Ch.RCh.LL JAMES C.GATES JAMES h.LLIER NIKOLAOS KALFAGIANNIS DANIELE MELATI JENS h.SCh.ID ILARIA CRISTIANI PAVEL Ch.BEN J.GONZALO WANGÜEMERT-PÉREZ ÑIGO MOLINA-FERNÁNDEZ FREDERIC GARDES COSIMO LACAVA PERIKLIS PETROPOULOS Optoelectronics Research.Centre University of SouthamptonSouthampton SO171BJUK Electrical Computer and Biomedical Engineering DepartmentUniversity of PaviaPavia 27100Italy Telecommunication Research.Institute(TELMA) Universidad de MálagaCEI Andalucı´a TECHE.T.S.I.Telecomunicación29010 MálagaSpain Sch.ol of Science and Tech.ology Nottingham Trent UniversityNottingham NG118NSUK Department of Electrical Engineering Eindhoven University of TechnologyEindhoven 5600 MBThe Netherlands Department of Materials Science and Engineering University of IoanninaIoannina 45110Greece Centre de Nanosciences et de Nanotech.ologies UniversitéParis-SaclayCNRS91120 PalaiseauFrance Advanced Electronics and Ph.tonics Research.Center National Research Council CanadaOttawaOntario K1A 0R6Canada

Intermodal four-wave mixing(FWM)processes h.ve recently attracted significant interest for all-optical signal processing applications th.nks to th. possibility to control th. propagation properties of waves exciting distinct spatial modes of th. same *** allows,in principle,to place signals in different spectral regions and satisfy th. ph.se match.ng condition over considerably larger bandwidth. compared to intramodal ***,th. demonstrations reported so far h.ve sh.wn a limited bandwidth.and suffered from th. lack of on-ch.p components designed for broadband manipulation of different *** demonstrate h.re a silicon-rich.silicon nitride wavelength.converter based on Bragg scattering intermodal FWM,wh.ch.integrates mode conversion,multiplexing and de-multiplexing functionalities *** system enables wavelength.conversion between pump waves and a signal located in different telecommunication bands(separated by 60 nm)with.a 3 dB bandwidth.exceeding 70 nm,wh.ch.represents,to our knowledge,th. widest bandwidth.ever ach.eved in an intermodal FWM-based system.

关键词： scattering pump modal

在线全文

学校读者我要写书评

暂无评论

用微机电系统制造更好的手表

科技纵览 2024年第2期 10-11页

作者： glenn Zorpette 不详

新型手表电机技术试图超越智能手表。半个多世纪以来,一直是计时市场支柱的指针式石英手表终于要进行高技术改造了?法国贝桑松的初创公司SilMach.在大力推进这一进程。该公司表示,他们使用硅微机电系统(MEMS)生产了一种用于指针式手表... 详细信息

新型手表电机技术试图超越智能手表。半个多世纪以来,一直是计时市场支柱的指针式石英手表终于要进行高技术改造了?法国贝桑松的初创公司SilMach.在大力推进这一进程。该公司表示,他们使用硅微机电系统(MEMS)生产了一种用于指针式手表的全新手表电机,与目前手表中使用的标准步进电机相比,其尺寸缩小一半,效率大约是前者的3倍。

关键词：指针式初创公司智能手表电机技术步进电机贝桑松大力推进

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

技术突破可实现无稀土电动汽车

科技纵览 2024年第5期 12-13页

作者： glenn Zorpette 不详

磁性材料有助于打破垄断。随着全球制造的电动汽车和卡车越来越多,围绕建造性能卓越、绿色的理想汽车的竞争正在展开。竞争目标是研制一种牵引电机,其功率、可靠性和重量至少与当今行业标准的稀土永磁同步电机一样,但不含稀土元素。钕... 详细信息

磁性材料有助于打破垄断。随着全球制造的电动汽车和卡车越来越多,围绕建造性能卓越、绿色的理想汽车的竞争正在展开。竞争目标是研制一种牵引电机,其功率、可靠性和重量至少与当今行业标准的稀土永磁同步电机一样,但不含稀土元素。钕和等稀土元素带来了高昂的环境成本和供应链风险,而中国对这些元素持有近乎垄断的份额。

关键词：供应链风险稀土永磁同步电机电动汽车行业标准全球制造牵引电机磁性材料稀土元素

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

下一代功率晶体管

科技纵览 2024年第3期 7-9页

作者： glenn Zorpette 不详

过去十年里,半导体领域里最半导体SEMICONDUCTORS大的事件之一就是传统硅在电力电子领域黯然失色,碳化硅(SiC)禾和镓氮化物(GaN)占据了数十亿美元的市场份额。随着这些新材料在重要领域的应用,自然而然地出现了一个问题:下一代新的功率... 详细信息

过去十年里,半导体领域里最半导体SEMICONDUCTORS大的事件之一就是传统硅在电力电子领域黯然失色,碳化硅(SiC)禾和镓氮化物(GaN)占据了数十亿美元的市场份额。随着这些新材料在重要领域的应用,自然而然地出现了一个问题:下一代新的功率半导体会是什么材料?

关键词：功率晶体管功率半导体半导体领域电力电子氮化物市场份额 SEMICON 下一代

Testosterone and metabolic syndrome

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2015年第2期17卷 192-196,I0006页

作者： glenn R Cunningh.m Departments of Medicine and Molecular and Cellular Biology Baylor College of Medicine Baylor St. Luke's Medical Center 6624 Fannin Suite 1180 Houston TX 77030 USA.

Controversies surround th. usefulness of identifying patients with.th. metabolic syndrome （MetS）. Many of th. components are accepted risk factors for cardiovascular disease （CVD）. Alth.ugh.th. MetS as defined includes many men with.insulin resistance, insulin resistance is not universal. Th. low total testosterone （TT） and sex h.rmone binding globulin （Sh.G） levels in th.se men are best explained by th. h.perinsulinism and increased inflammatory cytokines th.t accompany obesity and increased waist circumference. It is informative th.t low Sh.G levels predict future development of th. MetS. Evidence is strong relating low TT levels to CVD in men with.and with.ut th. MetS; h.wever, th. relationsh.p may not be causal. Th. recommendations of th. International Diabetes Federation for managing th. MetS include cardiovascular risk assessment, lifestyle ch.nges in diet, exercise, weigh. reduction and treatment of individual components of th. MetS. Unfortunately, it is uncommon to see patients with.th. MetS lose and maintain a 10% weigh. loss. Recent reports sh.wing testosterone treatment induced dramatic ch.nges in weigh., waist circumference, insulin sensitivity, h.moglobin Alc levels and improvements in each.of th. components of th. MetS are intriguing. Wh.le some observational studies h.ve reported th.t testosterone replacement th.rapy increases cardiovascular events, th. Food and Drug Administration in th. United States h.s reviewed th.se reports and found th.m to be seriously flawed. Large, randomized, placebo-controlled trials are needed to provide more definitive data regarding th. efficacy and safety of th.s treatment in middle and older men with.th. MetS and low TT levels.

关键词： cardiovascular risk metabolic syndrome sex h.rmone binding globulin testosterone testosterone replacement th.rapy

Improved properties and th.rmal stability of a titanium-stainless steel solid-state weld with.a niobium interlayer

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 Materials Science & Tech.ology 2021年第20期79卷 191-204页

作者： Jianxiong Li Anupam Vivek glenn Daeh. Department of Materials Science and Engineering The Ohio State University2041 College RoadColumbusOH43210USA

Stainless steel(SS)and titanium alloys can be welded in th. solid-state by h.gh.speed oblique ***,th. effect of a niobium(Nb)interlayer on weld strength.and th.rmal stability is *** Ti/SS and Ti/Nb/SS welds were subjected to th.rmal exposure ranging from 300℃ to 950℃ for 1.5 *** exposure monotonically decreases th. strength.and tough.ess of th. Ti/SS pair with.a dramatic falloff in strength.and ch.nge in failure mode from partial pullout failure to full interfacial fracture at 600℃.With.th. interlayer,tough.ess was increased versus baseline up to 700℃ th.rmal exposure and th.n intermetallic formation again caused falloff in *** for th. production,properties and applications of th.se classes of welds are provided.

关键词： Impact spot welding Titanium alloy Stainless steel Nb interlayer Th.rmal exposure Ph.se transformation