This paper describes a novel,semiautomated design methodology based on a genetic algorithm(GA)using freeform geometries for microelectromechanical systems(MEMS)devices.The proposed method can design MEMS devices compr...This paper describes a novel,semiautomated design methodology based on a genetic algorithm(GA)using freeform geometries for microelectromechanical systems(MEMS)devices.The proposed method can design MEMS devices comprising freeform geometries and optimize such MEMS devices to provide high sensitivity,large bandwidth,and large fabrication tolerances.The proposed method does not require much computation time or memory.The use of freeform geometries allows more degrees of freedom in the design process,improving the diversity and performance of MEMS devices.A MEMS accelerometer comprising a mechanical motion amplifier is presented to demonstrate the effectiveness of the design approach.Experimental results show an improvement in the product of sensitivity and bandwidth by 100%and a sensitivity improvement by 141%compared to the case of a device designed with conventional orthogonal shapes.Furthermore,excellent immunities to fabrication tolerance and parameter mismatch are achieved.展开更多
A more than 12 mW highly efficient fibre-DFB laser operating at 1618.3 nm is fabricated and characterised. Its high-power, low-noise and single-polarisation characteristics make it very suitable WDM-source for L-band ...A more than 12 mW highly efficient fibre-DFB laser operating at 1618.3 nm is fabricated and characterised. Its high-power, low-noise and single-polarisation characteristics make it very suitable WDM-source for L-band transmission.展开更多
Determining the cause and nature of the postmortem processes that living organisms experience is one of the main common issues faced by forensic experts,zooarchaeologists,palaeontologists,and other specialists.Carnivo...Determining the cause and nature of the postmortem processes that living organisms experience is one of the main common issues faced by forensic experts,zooarchaeologists,palaeontologists,and other specialists.Carnivores are among the most destructive agents that can interact with a corpse,since their feeding behaviour can lead to very extensive alterations,complicating the diagnostic identification of which carnivore species was responsible for the death of an individual,a livestock unit,or the formation of a fossil assemblage.Even though some currently available techniques enable forensic experts to undertake a differential diagnosis of carnivore agency from corpse examination.展开更多
基金This work was funded by the Science Challenge Project under Grant TZ2016006-0502-02the Natural Science Foundation of Hubei Province under Grant 2019CFB108.
文摘This paper describes a novel,semiautomated design methodology based on a genetic algorithm(GA)using freeform geometries for microelectromechanical systems(MEMS)devices.The proposed method can design MEMS devices comprising freeform geometries and optimize such MEMS devices to provide high sensitivity,large bandwidth,and large fabrication tolerances.The proposed method does not require much computation time or memory.The use of freeform geometries allows more degrees of freedom in the design process,improving the diversity and performance of MEMS devices.A MEMS accelerometer comprising a mechanical motion amplifier is presented to demonstrate the effectiveness of the design approach.Experimental results show an improvement in the product of sensitivity and bandwidth by 100%and a sensitivity improvement by 141%compared to the case of a device designed with conventional orthogonal shapes.Furthermore,excellent immunities to fabrication tolerance and parameter mismatch are achieved.
文摘A more than 12 mW highly efficient fibre-DFB laser operating at 1618.3 nm is fabricated and characterised. Its high-power, low-noise and single-polarisation characteristics make it very suitable WDM-source for L-band transmission.
基金supported and authorized by the Junta de Andalucía,Consejería de Educación,Cultura y Deporte:Orce Research Project(BC.03.032/17)supported by the Spanish Ministry of Science,Innovation and Universities,with a FPI Predoctoral Grant(PRE2019-089411),associated to project(RTI2018-099850-B-I00)+4 种基金the University of Salamanca.Darío Herranz-Rodrigo was supported by the Ministry of Science,Innovation and Universities,under the contract REF(PEJ2019-005420-A)as part of the i+D+I Garantía JuvenilGonzalo Linares-Matás was supported by an AHRC-Baillie Gifford Doctoral Scholarship(AH/R012709/1)at the University of OxfordJuan Manuel Jiménez-Arenas belongs to the Excellence Unit"Archaeometrical Studies.Inside the Artefacts and Ecofacts"(University of Granada)Junta the Andalucía FEDER Research Project REF(A-HUM-016UGR18)the Junta de Andalucía Research Group"HUM-607"the support of the TIDOP Research Group of the University of Salamanca。
文摘Determining the cause and nature of the postmortem processes that living organisms experience is one of the main common issues faced by forensic experts,zooarchaeologists,palaeontologists,and other specialists.Carnivores are among the most destructive agents that can interact with a corpse,since their feeding behaviour can lead to very extensive alterations,complicating the diagnostic identification of which carnivore species was responsible for the death of an individual,a livestock unit,or the formation of a fossil assemblage.Even though some currently available techniques enable forensic experts to undertake a differential diagnosis of carnivore agency from corpse examination.
