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MIT.nano receives grant to acquire focused ion beam scanning electron microscope（图）
聚焦离子束 扫描电子显微镜 双束纳米制造平台
2023/6/9
The VELION FIB-SEM, a next-generation dual-beam nanofabrication platform located in MIT.nano, will become a permanent part of the facility’s characterization capabilities, thanks in part to a Major Re...
The LHC experiments are nearing the completion of maintenance and upgrade works carried out in the framework of the second long shutdown of CERN’s accelerator complex. Of all the experiments, LHCb is ...
2018年SPIE激光谐振器，微谐振器和光束控制会议（SPIE Laser Resonators,Microresonators,and Beam Control XX）
2018年 SPIE 激光谐振器，微谐振器和光束控制 会议
2017/10/26
2018年SPIE激光谐振器，微谐振器和光束控制会议（SPIE Laser Resonators,Microresonators,and Beam Control XX）。
OBJECT DEFORMATIONS FROM IMAGE SILHOUETTES USING A KINEMATIC FINITE ELEMENT BEAM MODEL
Photogrammetry silhouette deformations beam finite elements
2016/11/11
In this paper a method is presented which allows the measurement of deflections and torsion by means of the silhouette of an object in images. The method is based on a finite element description of a ...
POINT CLOUD REFINEMENT WITH A TARGET-FREE INTRINSIC CALIBRATION OF A MOBILE MULTI-BEAM LIDAR SYSTEM
LIDAR Intrinsic Calibration Mobile Mapping 3D Automatic Computer Processing Velodyne
2016/7/27
LIDAR sensors are widely used in mobile mapping systems. The mobile mapping platforms allow to have fast acquisition in cities for example, which would take much longer with static mapping systems. Th...
Compressed sensing based cone-beam computed tomography reconstruction with a first-order method
Department of Radiation Oncology Stanford University Stanford California 94305
2015/8/7
This article considers the problem of reconstructing cone-beam computed tomography (CBCT) images from a set of undersampled and potentially noisy projection measurements. The authors cast the reconstr...
THE USE OF MULTI-BEAM RADARSAT-1 FOR TERRAIN MAPPING
MULTI-BEAM RADARSAT-1 TERRAIN MAPPING
2015/3/16
THE USE OF MULTI-BEAM RADARSAT-1 FOR TERRAIN MAPPING.
On the Retrieval of the Beam Transverse Wind Velocity Using Angles of Arrival from Spatially Separated Light Sources
Atmospheric Turbulence Optical Wave Propagation Wind Estimation Angle-of-Arrival Time-Delay-to-Peak Slope-at-Zero-Lag
2014/12/8
For optical propagation through the turbulent atmosphere, the angle of arrival (AOA) cross-correlation function obtained from two spatially separated light sources carries information regarding the tr...
BEAM STEERING CONTROL SYSTEM FOR LOW-COST PHASED ARRAY WEATHER RADARS: DESIGN AND CALIBRATION TECHNIQUES
Phased Arrays Electronically scanned antennas Radars T/R modules Phased array calibration Radar Calibration
2014/11/7
Phase array antennas are a promising technology for weather surveillance radars. Their fast beam steering capability offer the potential of improving weather observations and extending warning lead ti...
Evaluation of Live-Load Distribution Factors (LLDFs) of NEXT Beam Bridges
Live-Load Distribution Factors NEXT Beam Bridges
2014/10/22
A new precast-prestressed cross section was recently developed by a consortium of engineers from the six New England states, New York and members of the northeast region of PCI. The northeast extreme ...
Molecular-Beam Mass-Spectrometric Analyses of Hydrocarbon Flames
MBMS Laminar Flat Flame Cyclohexane
2014/10/21
Laminar flat flame combustion has been studied with molecular-beam mass-spectrometry (MBMS) for a fuel-rich cyclohexane (Ф = 2.003) flame, a fuel-lean toluene (Ф = 0.895), and a fuel-rich toluene (Ф =...
单模-多模光纤产生系列Bottle beam
Bottle beam 单模-多模光纤结构 多模干涉效应 仿真实验
2016/8/23
提出一种利用多模光纤的多模干涉效应在自由空间中获得多个局域空心光（Bottle beam）的新方法。单模-多模光纤结构是一段多模光纤无偏心地连接到一段单模光纤上,光由单模光纤传输到多模光纤激发产生一系列的LP0，n 模,由于多模干涉效应在多模光纤中相互叠加，当入射到自由空间后形成了多个Bottle beam。文中对光束传输过程进行理论分析并利用Matlab 进行仿真实验, 结果表明在自由空间中可以...
Controlling the Flow of Microscopic Particles—The Role of Beam Size
Optical Manipulation Optical Tweezers Directional Flow
2013/1/30
Flow of micro particles and fluids is important in many microscopic systems. Here we present details of our finding of a directional flow of micro particles due to a single beam optical trap. It was f...
The Efficiency of Reduced Beam Section Connections for Reducing Residual Drifts in Moment Resisting Frames
Residual Deformations Reduced Beam Section Connection P-Δ Effects
2013/1/31
In most framed structures anticipated deformations in accordance with current codes fall into acceptable limit states, whereas they go through substantial residual deformations in the aftermath of sev...