排序方式: 共有54条查询结果,搜索用时 18 毫秒
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G.C. Reali 《Optics Communications》1980,35(2):264-266
Experimental results on mode-locked action of a polarization coupled unstable resonator YAG laser are reported. The main features of this oscillator are ~ 20 mJ per pulse, good spatial profile and high focusable energy. 相似文献
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Michele Conti Michele Marconi Giulia Campanile Alessandro Reali Daniele Adami Raffaella Berchiolli Ferdinando Auricchio 《Meccanica》2017,52(3):633-644
Nitinol self-expanding stents are used for the endovascular management of peripheral artery diseases of the popliteal artery, which is located behind the knee joint. Unfortunately, the complex kinematics of the artery during the leg flexion leads to severe loading conditions, favouring the mechanical failure of the stent, calling for a specific biomechanical analysis. For this reason, in the present study we reconstruct by medical image analysis the patient-specific popliteal kinematics during leg flexion, which is subsequently exploited to compute the mechanical response of a stent model, virtually implanted in the artery by structural finite element analysis (FEA). The medical image analysis indicates a non-uniform configuration change of the artery during the leg flexion, leading to an increase of the vessel curvature above the knee. The computed mechanical response of the stent reflects the non-uniform configuration change of the artery as after the flexion the average stress is higher in the part of the stent located above the knee. Although the proposed analysis is limited to a case-study, it shows the capability of patient-specific FEA simulations to compute the mechanical response of a stent model subjected to the complex and severe loading conditions of the popliteal artery during leg flexion. 相似文献
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A. Agnesi E. Piccinini G.C. Reali C. Solcia 《Applied physics. B, Lasers and optics》1997,65(2):303-305
Received: 27 May 1997/Revised version: 20 June 1997 相似文献
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Dominik Schillinger John A. Evans Alessandro Reali Michael A. Scott Thomas J.R. Hughes 《PAMM》2013,13(1):107-108
Collocation is based on the discretization of the strong form of the underlying partial differential equations, which requires basis functions of sufficient order and smoothness. Consequently, the use of isogeometric analysis (IGA) for collocation suggests itself, since splines can be readily adjusted to any order in polynomial degree and continuity required by the differential operators. In addition, they can be generated for domains of arbitrary geometric and topological complexity, directly linked to and fully supported by CAD technology. The major advantage of isogeometric collocation over Galerkin type IGA is the minimization of the computational effort for numerical quadrature. (© 2013 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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Received: 27 October 1997/Revised version: 12 January 1998 相似文献
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Enhancement of high-frequency acoustic cavitation effects by a low-frequency stimulation 总被引:2,自引:0,他引:2
Lernetti G Ciuti P Dezhkunov NV Reali M Francescutto A Johri GK 《Ultrasonics sonochemistry》1997,4(3):263-268
The cavitation effects given by a high-frequency pulsed ultrasound field are studied with and without the stimulation of a low-frequency field. Sonoluminescence intensity and subharmonic one-half intensity of the high-frequency field are measured. The stimulation gives a sharp rise of both subharmonic and sonoluminescence intensities. 相似文献
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The second harmonic pulse train from a mode-locked NdYAG Self-Filtering Unstable Resonator has been compressed by a factor of 2.3 using Raman backscattering. Single pulses of 7.4 picoseconds at=0.68m and with 70 percent success probability have been obtained. 相似文献
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