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Copy-paste processing is a frequently used method to tamper an image. For JPEG format is the mostly employed image format, more likely the copied slice came from JPEG image. In this paper, we first introduce two copy-paste tampering Scenarios: one is conducted between JPEG images and saved in a loss less format, the other is also conducted between JPEG images, but is saved in the JPEG format. Then...
The measurement of blood-plasma velocity distributions with high spatial and temporal resolution in vivo is important for the investigation of embryonic heart at its early stage development. Optical Coherence Tomography is a non-invasive imaging modality with high resolution (5 to 20μm) that can provide flow velocity information by calculating the Doppler frequency shift. In this paper, a high speed...
In the produce of HFIW(High frequency induction welding) pipe, HAZ(Heating area zone) temperature distribution is the most decisive factor of welding quality. In this paper, HFIW pipe production system, based on comprehensive consideration of the magnetic field boundary conditions and material properties of the highly nonlinear and other issues, the establishment of a tube of three-dimensional finite...
Vehicle following for traffic safety has been an active area of research. Longitudinal distance automate control is key for vehicle following mode in autonomous cruise system. Sliding mode control has been applied in vehicle longitudinal distance control. But most of them ignore or simplify acceleration information and control performance is reduced. In this paper the longitudinal distance sliding...
To explore the methods for improving the mechanical properties and increasing the service life, deeply analyses were carried out on the forming process of hexagon hollow steels. This paper established the three-dimensional model, calculated the strain field, stress field, temperature field by rigid-plastic FEM, built up the microstructure evolution model based on physical metallurgy theories for the...
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