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This paper presents an All-in-one simulation method for klystron. The simulation results compared with conventional simulation results are also presented. Conventional simulation method calculates the klystron in part. The electron gun, beam-wave interaction and the collector are designed respectively, and thus the simulation results are inauthentic commonly. The All-in-one simulation method uses...
Mesh generation is a critical and probably the most manually intensive step in CFD simulations in the architectural domain. One essential feature is the large span of dimensional scales that is encountered in design, particularly if the model aims to simulate indoor and outdoor conditions concurrently, e.g., site at the magnitude of kilometers while building elements at the magnitude of centimeters...
Traffic volume prediction is the key approach of highway planning stage. Grey forecast model can be used to predict the traffic volume under the condition of lacking traffic volume datum. This paper firstly points out the defect of Grey prediction formula in traditional GM(1,1) model through analyzing the Grey forecast theory, then modifies and expands the old formula, propose the new prediction formula,...
In this paper, the design of input and output cavity for X-band sheet beam klystron was presented. The fabrication and cold test of a barbell cavity were conducted, and the cavity characteristics were predicted by both CST simulation and measurement.
In this paper, the scattering characters of passive calibrator are experimentally researched for SAR calibration applications. The works are focused on the SAR image of corner reflectors larger than the resolution cells. What is more, the RCS of the nonorthogonal and unevenness corner reflector are also studied. Finally, for full PolSAR calibration, we also discover some interesting phenomena for...
In this paper, A SAR image simulation code of 3D complex targets named CASpatch is introduced. This code is based on the high frequency technique of shooting and bouncing rays (SBR). The original purpose to design the code is for SAR automatic target recognition (ATR) applications, but it can also be used for RCS prediction and high resolution range profile (HRRP) generation. A GB-SAR indoor experiment...
Inspection planning plays one of important roles in examining a manufactured part in 3D sizes, positions and forms using coordinate measuring machine (CMM). Accessibility analysis must be done during CMM inspection planning. Usually, accessibility analysis is based on the computation of a part's computer-aided design (CAD) model and the model of a probe. In this paper, a new accessibility analysis...
In architectural and mechanical engineering, man-made CAD models often have some prominent contours and regular shapes. These features are important to the visual perception. Traditional mesh simplification methods are not very suitable for this kind of models because in the simplified results some important mini structures and shape regularities are always missed. In this paper, we propose a new...
A hybrid approach for the surface segmentation of sparse triangle meshes is presented. The algorithm realizes the segmentation of different regions of triangle meshes through twice segmentations phases: in the first phase, for sparse mesh regions, the edge-based method is used after combination of planes according to the variance of the dihedral angle of normal vector; in the second phase, for other...
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