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Subject-specific Finite Element Modelling of the Human Shoulder Complex Part 1:Model Construction and Quasi-static Abduction Simulation

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Journal of Bionic Engineering 2020年第6期17卷 1224-1238页

作者： Manxu Zheng Zhihui Qian Zhenmin Zou chris Peach Mohammad Akrami Lei Ren School of Mechanical Aerospace and Civil EngineeringUniversity of ManchesterManchesterM139PLUK Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong province School of Biomedical EngineeringSun Yat-sen UniversityGuangzhou 510006China Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun 130022China Shoulder and Elbow Unit The University Hospital of South Manchester NHS Foundation TrustSouthmoor RoadWythenshaweManchester M239LTUK department of Engineering College of EngineeringMathematicsand Physical SciencesUniversity of ExeterExeter EX44QFUK

Human shoulder joints exhibit stable but highly active characteristics due to a large amount of soft *** Element(FE)modelling plays an important role in enhancing our understanding of the mechanism of shoulder ***,the previous FE shoulder models largely neglected the Three-dimensional(3d)volume of soft tissues and their sophisticated interactions with the *** study develops a 3d model of the rotator cuff and deltoid muscles and *** also includes cartilage and,for the first time,main ligaments around the joint to provide a better computational representation of the delicate interaction of the soft *** model has potential value for studying the force transfer mechanism and overall joint stability variation caused by 3d pathological changes of rotator cuff *** analysis systems and Magnetic Resonance(MR)scans were used to collect shoulder movement and geometric data from a young healthy subject,*** on MR images,a FE model with detailed representations of the musculoskeletal components was constructed.A multi-body model and the measured motion data were utilised to estimate the loading and boundary ***-static FE analyses simulated four instants of the measured scapular *** determined glenohumeral motion,stress/strain distribution in soft tissues,contact area,and mean/peak contact pressure were found to increase monotonically from 0°to 30°of *** results of muscle forces,bone-on-bone contact force,and superior-inferior movement of the humeral centre during motion were consistent with previous experimental and numerical *** is concluded that the constructed FE shoulder model can accurately estimate the biomechanics in the investigated range of motion and may be further used for the comprehensive study of shoulder musculoskeletal disorders.

关键词： shoulder complex biomechanics finite element glenohumeral joint subject-specific

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Piezoelectric Materials for Controlling Electro-Chemical Processes

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Nano-Micro Letters 2020年第11期12卷 51-89页

作者： Weiqi Qian Weiyou Yang Yan Zhang chris R.Bowen Ya Yang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro‑nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083People’s Republic of China Institute of Materials Ningbo University of TechnologyNingbo 315211People’s Republic of China department of Mechanical Engineering University of BathBath BA27AKUK School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004People’s Republic of China

Piezoelectric materials have been analyzed for over 100 years,due to their ability to convert mechanical vibrations into electric charge or electric fields into a mechanical strain for sensor,energy harvesting,and actuator applications.A more recent development is the coupling of piezoelectricity and electro-chemistry,termed piezo-electro-chemistry,whereby the piezoelectrically induced electric charge or voltage under a mechanical stress can influence electro-chemical *** is growing interest in such coupled systems,with a corresponding growth in the number of associated publications and *** review focuses on recent development of the piezo-electro-chemical coupling multiple systems based on various piezoelectric *** provides an overview of the basic characteristics of piezoelectric materials and comparison of operating conditions and their overall electro-chemical *** reported piezo-electro-chemical mechanisms are examined in *** are made between the ranges of material morphologies employed,and typical operating conditions are *** addition,potential future directions and applications for the development of piezo-electro-chemical hybrid systems are *** review provides a comprehensive overview of recent studies on how piezoelectric materials and devices have been applied to control electro-chemical processes,with an aim to inspire and direct future efforts in this emerging research field.

关键词： Piezoelectric materials Piezoelectric effect Electro-chemistry Piezo-electro-chemistry

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Hybrid energy module for remote environmental observations, experiments, and communications

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Advances in Polar Science 2020年第3期31卷 156-166页

作者： Misha B.KRASSOVSKI Jeffery S.RIGGS chris TAVINO Stan d.WULLSCHLEGER Susan L.HEINZ Environmental Sciences division Climate Change Science InstituteOak Ridge National LaboratoryOak RidgeTN 37831-6290USA Integrated Operations Support division Oak Ridge National LaboratoryOak RidgeTN 37831-6290USA Laboratory Modernization division Oak Ridge National LaboratoryOak RidgeTN 37831-6290USA

Increased concerns about climate change have led to a significant expansion of monitoring, observational, and experimental sites in remote areas of the world. Meanwhile, advances in technology and availability of low-power equipment have allowed increasingly sophisticated measurements with a wide variety of instruments. However, the deployment and use of these technologies in remote locations is often restricted not only by harsh environmental conditions, but also by the availability of electrical power and communication options. In some cases, research stations and military installations can provide power for scientific equipment, data acquisition, storage, and transmission. Clustering of research sites near existing infrastructure has had the unintended consequence of limiting a spatial understanding of large geographic regions. Fortunately, the modern market offers many power and communication solutions, but most of them are oriented toward large industrial applications. Use of those solutions to power a research site is limited because of their cost and need for significant modification for the specific research purposes. Each study has its own unique power requirements and needs for proper instrumentation. A power and communication solution for a vast majority of implementations with or without modification would be of considerable benefit. This article describes design of a universal, scalable hybrid energy module for the Next-Generation Ecosystem Experiments Arctic project(https://***/). Two modules were built, and the authors describe their implementation and findings over a 2-year period at a remote field site on the Seward Peninsula in western Alaska, USA.

关键词： solar energy wind energy communications power sources alternative energy NGEE Arctic

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Virtual vignettes: the acquisition,analysis,and presentation of social network data

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Science China(Information Sciences) 2014年第3期57卷 46-65页

作者： HOWdEN chris LIU Lu LI ZhiYuan LI JianXin ANTONOPOULOS Nick School of Computing and Mathematics University of DerbyDerby DE22 1GBUnited Kingdom School of Computer Science and Telecommunication Engineering Jiangsu University School of Computer Science and Engineering Beihang University School of Computing and Mathematics University of Derby

Online social networks(OSNs)are immensely prevalent and have now become a ubiquitous and important part of the modern,developed ***,online social networks pose significant problems to digital forensic investigators who have no experience *** will reside on multiples of servers in multiple countries,across multiple *** it before it is overwritten or deleted is a known problem,mirrored in other cloud based *** this article,a novel method has been developed for the extraction,analysis,visualization,and comparison of snapshotted user profile data from the online social network *** research follows a process of design,implementation,simulation,and *** code of the tool that was developed to facilitate data extraction has been made available on the Internet.

关键词： online social networks Twitter digital forensics cloud computing social network forensic analysis

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Coupling Enhancement of a Flexible BiFeO_(3) Film-Based Nanogenerator for Simultaneously Scavenging Light and Vibration Energies

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Nano-Micro Letters 2022年第12期14卷 137-150页

作者： Xiao Han Yun Ji Li Wu Yanlong Xia chris RBowen Ya Yang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400People’s Republic of China department of Mechanical Engineering University of BathBath BA27AKUK School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Center On Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004People’s Republic of China

Coupled nanogenerators have been a research hotspot due to their ability to harvest a variety of forms of energy such as light,mechanical and thermal energy and achieve a stable direct current *** films are frequently investigated for photovoltaic applications due to their unique photovoltaic properties and bandgap-independent photovoltage,while the flexoelectric effect is an electromechanical property commonly found in solid ***,we effectively construct a new form of coupled nanogenerator based on a flexible BiFeO_(3) ferroelectric film that combines both flexoelectric and photovoltaic effects to successfully harvest both light and vibration *** device converts an alternating current into a direct current and achieves a 6.2% charge enhancement and a 19.3%energy enhancement to achieve a multi-dimensional"1+1>2"coupling enhancement in terms of current,charge and *** work proposes a new approach to the coupling of multiple energy harvesting mechanisms in ferroelectric nanogenerators and provides a new strategy to enhance the transduction efficiency of flexible functional devices.

关键词： Ferroelectric film Coupled nanogenerators Photovoltaic effect Flexoelectric effect Energy collection

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defining the effect of sweep tillage tool cutting edge geometry on tillage forces using 3d discrete element modelling

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Information Processing in Agriculture 2015年第2期2卷 130-141页

作者： Mustafa Ucgul John M.Fielke chris Saunders Barbara Hardy Institute School of EngineeringUniversity of South AustraliaMawson LakesSA 5095Australia

The energy required for tillage processes accounts for a significant proportion of total energy used in crop *** many tillage processes decreasing the draft and upward vertical forces is often desired for reduced fuel use and improved penetration,*** studies have proved that the discrete element modelling(dEM)can effectively be used to model the soil–tool *** his study,Fielke(1994)[1]examined the effect of the various tool cutting edge geometries,namely;cutting edge height,length of underside rub,angle of underside clearance,on draft and vertical *** this paper the experimental parameters of Fielke(1994)[1]were simulated using 3d discrete element modelling *** the simulations a hysteretic spring contact model integrated with a linear cohesion model that considers the plastic deformation behaviour of the soil hence provides better vertical force prediction was *** parameters were determined by comparing the experimental and simulation results of angle of repose and penetration *** results of the study showed that the simulation results of the soil-various tool cutting edge geometries agreed well with the experimental results of Fielke(1994)[1].The modelling was then used to simulate a further range of cutting edge geometries to better define the effect of sweep tool cutting edge geometry parameters on tillage *** extra simulations were able to show that by using a sharper cutting edge with zero vertical cutting edge height the draft and upward vertical force were further reduced indicating there is benefit from having a really sharp cutting *** extra simulations also confirmed that the interpolated trends for angle of underside clearance as suggested by Fielke(1994)[1]where correct with a linear reduction in draft and upward vertical force for angle of underside clearance between the ranges of-25 and-5°,and between-5 and 0°.The good correlations give confidence to recommend further invest

关键词： dEM Cutting edge geometry

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A multifunctional optical-thermal logic gate sensor array based on ferroelectric BiFeO_(3) thin films

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InfoMat 2023年第5期5卷 111-120页

作者： Li Wu Yun Ji Huiyu dan chris RBowen Ya Yang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingthe People's Republic of China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanningthe People's Republic of China department of Mechanical Engineering University of BathBathUK

The growing need to process a diverse range of data has ignited effort in developing new multifunctional logic gate *** this article,we report a new form of all-in-one logic gate system that exploits the photoresponsivity of a self-powered multifunctional BiFeO_(3)(BFO)sensor *** BFO sensor can not only detect both light intensity and temperature,but it can also execute three common logic gates of“ANd”,“OR”,and“NOT”by converting optical and thermal inputs into electrical *** diverse functionality of the BFO logic gate sensor array utilizes the unique light-and temperaturecontrolled energy band structure and carrier behavior of the BFO *** demonstrate the potential,a 3×3 logic gate sensor matrix is developed,which successfully detected light and temperature distributions,and accurately produced the three basic logic gate *** work provides a new route to construct highly integrated multifunctional electronic devices for the advancement of large sensing,communication,and computing operations.

关键词： BiFeO_(3) logic gate optical-thermal photocurrent photovoltage

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Energy Balance and Body Weight Regulation

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中国运动医学杂志 2006年第5期25卷 608-615页

作者： chris Melby Matt Hickey dept .of Food Science and Human Nutrition Nutrition and Metabolic Fitness LaboratoryColorado State University Fort Collins CODr .P.H. Human Performance/Clinical Research Lab Department ofHealth and Exercise ScienceColorado State University Fort Collins COPh.D.

Thermodynamic laws dictate that an excess of food energy intake relative to energy expenditure will lead to energy storage-an accumulation of fat. Conversely, a deficit of energy intake relative to expenditure will le... 详细信息

关键词： body than

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Optimisation of alloy composition for highly-formable magnesium sheet

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International Journal of Minerals,Metallurgy and Materials 2022年第7期29卷 1388-1395页

作者： Zhuoran Zeng Mingzhe Bian Shiwei Xu Weineng Tang chris davies Nick Birbilis Jianfeng Nie College of Engineering and Computer Science Australian National UniversityACT.2601Australia department of Materials Science and Engineering Monash UniversityVIC 3800Australia State Key Laboratory of Advanced design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China Research Institute(R&d Center) Baosteel Group CorporationShanghai 201999China department of Mechanical and Aerospace Engineering Monash UniversityVIC 3800Australia

The effectiveness of Ca or Gd addition on ductility and formability of Mg-Zn-Zr based dilute alloys in deep drawing has not been systematically compared *** this study,formable Mg-Zn-Gd-Zr and Mg-Zn-Ca-Zr sheet alloys are produced by hot *** sheets have similarly weakened basal texture,but the sheet of the Mg-Zn-Gd-Zr alloys has higher ductility and formability than that of Mg-Zn-Ca-Zr *** combined addition of 0.2wt%Ca and 0.4wt%Gd to the Mg-1Zn-0.5Zr(wt%)alloy leads to a Mg-1Zn-0.4Gd-0.2Ca-0.5Zr alloy that has even better ductility,and its formability during deep drawing is comparable to the benchmark Al6016 *** increase in Ca content from 0.2wt%to 0.5wt%leads to decreased sheet ductility and formability,predominantly due to grain boundary embrittlement.

关键词： magnesium sheet alloy texture microstructure formability solute segregation

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Global variations in critical drought thresholds that impact vegetation

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National Science Review 2023年第5期10卷 180-193页

作者： Xiangyi Li Shilong Piao chris Huntingford Josep Pe?uelas Hui Yang Hao Xu Anping Chen Pierre Friedlingstein Trevor F.Keenan Stephen Sitch Xuhui Wang Jakob Zscheischler Miguel d.Mahecha Sino-French Institute for Earth System Science College of Urban and Environmental SciencesPeking University Key Laboratory of Alpine Ecology and Biodiversity Institute of Tibetan Plateau ResearchCenter for Excellence in Tibetan Earth ScienceChinese Academy of Sciences UK Centre for Ecology and Hydrology CSIC Global Ecology Unit CREAF-CSIC-UAB CREAF Cerdanyola de Vallès department of Biogeochemical Integration Max Planck Institute for Biogeochemistry department of Biology Colorado State University Graduate degree Program in Ecology Colorado State University department of Mathematics College of Engineering Mathematics and Physical SciencesUniversity of Exeter Laboratoire de Météorologie dynamique Institut Pierre-Simon LaplaceCNRS-ENS-UPMC-XDépartement de GeósciencesEcole Normale Superieure Earth and Environmental Sciences Area Lawrence Berkeley National Laboratory department of Environmental Science Policy&ManagementUniversity of California Berkeley department of Geography College of Life and Environmental SciencesUniversity of Exeter department of Computational Hydrosystems Helmholtz Centre for Environmental Research—Ufz Remote Sensing Centre for Earth System Research Leipzig University

Identifying the thresholds of drought that,if crossed,suppress vegetation functioning is vital for accurate quantification of how land ecosystems respond to climate variability and *** present a globally applicable framework to identify drought thresholds for vegetation responses to different levels of known soil-moisture deficits using four remotely sensed vegetation proxies spanning *** thresholds identified represent critical inflection points for changing vegetation responses from highly resistant to highly vulnerable in response to drought stress,and as a warning signal for substantial vegetation *** thresholds varied geographically,with much lower percentiles of soil-moisture anomalies in vegetated areas covered by more forests,corresponding to a comparably stronger capacity to mitigate soil water deficit stress in forested ***,those lower thresholds are detected in more humid ***-of-the-art land models,however,overestimated thresholds of soil moisture(*** drought impacts),especially in more humid areas with higher forest covers and arid areas with few forest *** on climate model projections,we predict that the risk of vegetation damage will increase by the end of the twenty-first century in some hotspots like East Asia,Europe,Amazon,southern Australia and eastern and southern *** data-based results will inform projections on future drought impacts on terrestrial ecosystems and provide an effective tool for drought management.

关键词： drought threshold inflection points vegetation response soil moisture drought impacts

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