检索结果-南通市图书馆

MECHAnICAL PROPERTIES AnD MICROSTRUCTURES OF Ti(C,n) BASED CERMETS

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1996年第4期6卷 117-121页

作者： liu, n Hu, ZH Cui, K liu, CL AnHUI InST TECHnOL DEPT MAT SCI & ENGNHEFEI 230069PEOPLES R CHINA HUAZHOnG UnIV SCI & TECHnOL WUHAN 430074PEOPLES R CHINA BEIJInG GEn RES InST IROn & STEEL BEIJING 100081PEOPLES R CHINA

ＭＥＣＨＡＮＩＣＡＬＰＲＯＰＥＲＴＩＥＳＡＮＤＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＯＦＴｉ（Ｃ，Ｎ）ＢＡＳＥＤＣＥＲＭＥＴＳ￥ＬｉｕＮｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉ... 详细信息

ＭＥＣＨＡＮＩＣＡＬＰＲＯＰＥＲＴＩＥＳＡＮＤＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＯＦＴｉ（Ｃ，Ｎ）ＢＡＳＥＤＣＥＲＭＥＴＳ￥ＬｉｕＮｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，ＡｎｈｕｉＩｎｓｔｉｌｕｔｅ...

关键词： Ti(C,n) based cermets mechanical properties microstructure

DSC study on temperature memory effect of niTi shape memory alloy

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2006年第B1期16卷 37-41页

作者： n. liu W. M. HUAnG School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore 639798

A systematic study on the temperature memory effect (TME) in a polycrystalline niTi shape memory alloy was presented. The investigation was carried out through a series of differential scanning calorimeter (DSC) tests. Two types of tests were conducted, namely single-step test and multi-step test. The influence of the step temperature on the peak/trough temperatures in the subsequent heating process and the associated energy absorption/release in the phase transformations was investigated. Using a simple theoretical model, the exact mechanism behind TME was studied.

关键词：镍钛合金形状记忆合金温度记忆效应相转变差分扫描量热计

LASER HEAT TREATInG RESEARCH OF THREE KInDS OF HIGH SPEED STEEL

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1999年第5期12卷 757-760页

作者： liu, W.n. Fang, M.n. Xing, J. liu, Y.W. Changchun Inst of Optics and Fine Mechanics Changchun China

After laser quenching and tempering of three kinds of annealed tool high-speed steel(W18Cr-4V, W9Mo3Cr4V1, W6Mo5Cr4V2) test samples, the microhardness measurer was used to test the samples and some problems, such as the hardness and depth of hardening-quenching layer were analyzed. Furthermore, after laser quenching and tempering of the quenched and three-time tempered high-speed steel (W18Cr4V) and its hardness analyzing, different results of laser-quenching samples were obtained under different initial heat-treating.

关键词： Hardening Heat treatment Laser beam effects Microhardness Phase transitions Quenching

Synthesis of new Squarains Used as Organic Electroluminescent Materials

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1997年第5期8卷 403-406页

作者： liu, n Lu, ZY Xie, MG Jiang, Q SICHUAn UnIV DEPT CHEMCHENGDU 610064PEOPLES R CHINA

Two types of eight kinds of new squarains were designed and synthesized. Their structures were elucidated by IR,nMR,MS and elementary analysis. Their luminescent properties were determined,which indicated that they ca... 详细信息

关键词： OC Cl

Complex skin modes in non-Hermitian coupled laser arrays

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2022年第12期11卷 3002-3007页

作者： Yuzhou G.n.liu Yunxuan Wei Omid Hemmatyar Georgios G.Pyrialakos Pawel S.Jung Demetrios n.Christodoulides Mercedeh Khajavikhan Ming Hsieh Department of Electrical and Computer Engineering University of Southern CaliforniaLos AngelesCA 90089USA CREOL The College of Optics&PhotonicsUniversity of Central FloridaOrlandoFL 32816-2700USA Faculty of Physics Warsaw University of TechnologyKoszykowa 7500-662 WarsawPoland Department of Physics&Astronomy Dornsife College of LettersArts&SciencesUniversity of Southern CaliforniaLos AngelesCA 90089USA

From biological ecosystems to spin glasses,connectivity plays a crucial role in determining the function,dynamics,and resiliency of a *** the realm of non-Hermitian physics,the possibility of complex and asymmetric exchange interactions(|κ_(ij)|≠|κ_(ji)|)between a network of oscillators has been theoretically shown to lead to novel behaviors like delocalization,skin effect,and bulk-boundary *** archetypical lattice exhibiting the aforementioned properties is that proposed by Hatano and nelson in a series of papers in late *** the ramifications of these theoretical works in optics have been recently pursued in synthetic dimensions,the Hatano-nelson model has yet to be realized in real *** makes the implementation of these lattices challenging is the difficulty in establishing the required asymmetric exchange interactions in optical *** this work,by using active optical oscillators featuring non-Hermiticity and nonlinearity,we introduce an anisotropic exchange between the resonant elements in a lattice,an aspect that enables us to observe the non-Hermitian skin effect,phase locking,and near-field beam steering in a Hatano-nelson laser *** work opens up new regimes of phase-locking in lasers while shedding light on the fundamental physics of non-Hermitian systems.

关键词： Hermitian locking Complex

The microstructure characteristics and fracture behavior of the polyhedral primary iron-rich phase and plate-shaped eutectic iron-rich phase in a high-pressure die-cast AlSi10MnMg alloy

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 & Technology 2023年第9期140卷 201-209页

作者： X.Y.Jiao Y.X.liu J.Wang W.n.liu A.X.Wan Stuart Wiesner S.M.Xiong School of Materials Science and Engineering Northeastern UniversityShenyang 110819China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Key Laboratory of Lightweight Structural Materials Liaoning ProvinceNortheastern UniversityShenyang 110819China Key Laboratory for Advanced Materials Processing Technology Tsinghua UniversityBeijing 100084China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Ein Unternehmen der ALUMInIUM RHEInFELDEn Group RHEINFELDEN 79618Germany

The characterization of multiple iron-rich phases in high-pressure die-cast AlSi10MnMg alloy was *** was focused on the formation and fracture behavior of the primary iron-rich phase((P-IMC)_(I))formed in the shot sleeve and plate-shaped eutectic iron-rich phase in high-pressure die cast(HPDC)AlSi10MnMg *** show that multiple types of iron-rich phases with various morphologies,in-cluding primary iron-rich phases(polyhedral(P-IMC)_(I) and(P-IMC)_(II))and eutectic iron-rich phases(plate-shaped,net shape,and fish-bone shape),were found in HPDC ***(P-IMC)_(I) formed in the shot sleeve were distributed in the interface between primaryα-Al and binary Al-Si *** size(P-IMC)_(II) and various eutectic iron-rich phases formed in the die cavity and they were distributed in Al-Si binary *** primary iron-rich phases belonged to a simple cubic crystal structure with a lattice constant a=1.265 nm and they exhibited a lateral growth characteristic with a termination of{110}surface.βphase was surrounded byδphase and they coexisted in a plate-shaped iron-rich ***-density stacking fault inβphase andδ/βinterface provided an excellent nucleation site forδ*** mechanical behavior,the stress concentration caused by eutectic iron-rich phases was far less than(P-IMC)_(I) and it would not cause crack initiation along the eutectic cluster *** addition,(P-IMC)_(I) showed the worst deformation coordination with primaryα-Al while the plate-shaped eutectic iron-rich phase exhibited similar deformation characteristics with silicon particles.

关键词： AlSi10MnMg High-pressure die casting Multiple iron-rich phases

Management of proximal biceps tendon pathology

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Orthopedics 2022年第1期13卷 36-57页

作者： Simon P Lalehzarian Avinesh Agarwalla Joseph n liu The Chicago Medical School Rosalind Franklin University of Medicine and ScienceNorth ChicagoIL 60064United States Department of Orthopedic Surgery Westchester Medical CenterValhallaNY 10595United States USC Epstein Family Center for Sports Medicine Keck Medicine of USCLos AngelesCA 90033United States

The long head of the biceps tendon is widely recognized as an important pain generator,especially in anterior shoulder pain and dysfunction with athletes and working *** purpose of this review is to provide a current understanding of the long head of the biceps tendon anatomy and its surrounding structures,function,and relevant clinical information such as evaluation,treatment options,and complications in hopes of helping orthopaedic surgeons counsel their *** understanding of the long head of the biceps tendon anatomy and its surrounding structures is helpful to determine normal function as well as pathologic injuries that stem *** biceps-labral complex has been identified and broken down into different regions that can further enhance a physician’s knowledge of common anterior shoulder pain *** various physical examination maneuvers exist meant to localize the anterior shoulder pain,the lack of specificity requires orthopaedic surgeons to rely on patient history,advanced imaging,and diagnostic injections in order to determine the patient’s next *** treatment options such as anti-inflammatory medications,physical therapy,and ultrasound-guided corticosteroid injections should be utilized before entertaining surgical treatment *** surgery is needed,the three options include biceps tenotomy,biceps tenodesis,or superior labrum anterior to posterior *** for biceps tenodesis,recent studies have analyzed open vs arthroscopic techniques,the ideal location of tenodesis with intra-articular,suprapectoral,subpectoral,extra-articular top of groove,and extra-articular bottom of groove approaches,and the best method of fixation using interference screws,suture anchors,or cortical *** surgeons should be aware of the complications of each procedure and respond accordingly for each *** treated,patients often have good to excellent clinical outcomes and low rates of complicat

关键词： Shoulder pathology Long head of the biceps tendon Biceps-labral complex Biceps tenotomy Biceps tenodesis Superior labrum anterior to posterior lesions

Return to work following shoulder arthroplasty:A systematic 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

World Journal of Orthopedics 2022年第9期13卷 837-852页

BACKGROUnD Many patients prioritize the ability to return to work(RTW)after shoulder replacement surgeries such as total shoulder arthroplasty(TSA),reverse TSA(rTSA),and shoulder hemiarthroplasty(HA).Due to satisfactory clinical and functional long-term outcomes,the number of shoulder replacements performed will continue to rise into this next *** younger individuals who compose a significant amount of the workforce receiving shoulder replacements,patients will begin to place a higher priority on their ability to RTW following shoulder *** To summarize RTW outcomes following TSA,rTSA,and HA,and analyze the effects of workers’compensation status on RTW rates and *** This systematic review and analysis was performed in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines.A literature search regarding RTW following shoulder arthroplasty was performed using four databases(PubMed,Scopus,Embase,and Cochrane Library),and the Reference Citation Analysis(https://***/).All studies in English relevant to shoulder arthroplasty and RTW through January 2021 that had a level of evidence I to IV were *** studies,literature reviews,case reports,and those not reporting on RTW after shoulder arthroplasty were *** The majority of patients undergoing TSA,rTSA,or HA were able to RTW betweenone to four months,depending on work demand *** sedentary or light demand jobs generally have higher rates of RTW,moderate or heavy demand jobs tend to have poorer rates of *** rates of RTW following TSA(71%-93%)were consistently higher than those reported for HA(69%-82%)and rTSA(56%-65%).Furthermore,workers’compensation status negatively influenced clinical outcomes following shoulder *** a pooled means analysis,we proposed guidelines for the average time to RTW after TSA,rTSA,and *** TSA,rTSA,and HA,the average time to RTW re

关键词： Shoulder replacement Total shoulder arthroplasty Reverse total shoulder arthroplasty Hemiarthroplasty Return to work

Machine learning in orthopaedic surgery

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Orthopedics 2021年第9期12卷 685-699页

作者： Simon P Lalehzarian Anirudh K Gowd Joseph n liu The Chicago Medical School Rosalind Franklin University of Medicine and ScienceNorth ChicagoIL 60064United States Department of Orthopaedic Surgery Wake Forest Baptist Medical CenterWinston-SalemNC 27157United States USC Epstein Family Center for Sports Medicine Keck Medicine of USCLos AngelesCA 90033United States

Artificial intelligence and machine learning in orthopaedic surgery has gained mass interest over the last decade or *** prior studies,researchers have demonstrated that machine learning in orthopaedics can be used for different applications such as fracture detection,bone tumor diagnosis,detecting hip implant mechanical loosening,and grading *** time goes on,the utility of artificial intelligence and machine learning algorithms,such as deep learning,continues to grow and expand in orthopaedic *** purpose of this review is to provide an understanding of the concepts of machine learning and a background of current and future orthopaedic applications of machine learning in risk assessment,outcomes assessment,imaging,and basic science *** most cases,machine learning has proven to be just as effective,if not more effective,than prior methods such as logistic regression in assessment and *** the help of deep learning algorithms,such as artificial neural networks and convolutional neural networks,artificial intelligence in orthopaedics has been able to improve diagnostic accuracy and speed,flag the most critical and urgent patients for immediate attention,reduce the amount of human error,reduce the strain on medical professionals,and improve *** machine learning has shown diagnostic and prognostic uses in orthopaedic surgery,physicians should continue to research these techniques and be trained to use these methods effectively in order to improve orthopaedic treatment.

关键词： Artificial intelligence Machine learning Supervised learning Unsupervised learning Deep learning Orthopaedic surgery