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A method for accurately calculating the sampling volume in a tilted imaging system is proposed. Two types of tilted imaging systems are investigated, i.e., Type I (only the object plane is inclined to the optical axis) and Type II (both the object plane and the image plane are inclined to the optical axis). Based on geometrical optics, the sampling volumes of these two types of tilted imaging systems...
An auxiliary differential equation (ADE) finite-difference time-domain (FDTD) method is applied to analyze the effect of ionospheric high frequency (HF) heating on electromagnetic (EM) wave propagation. First ionosphere background parameters in East China generated from IRI are introduced in the study model and nonlinear phenomenon during ionospheric heating process at low altitude between 60 and...
An efficient three-dimensional (3D) direct integration (DI) finite-difference time-domain (FDTD) method is introduced to solve electromagnetic wave propagation problems in anisotropic magnetized plasma medium using matrix method. Compared with previous 3D FDTD plasma method, our method is more flexible in adjusting medium parameters thus can deal with varied mediums. Through several simulations, the...
The adventure of sophisticated photo editing software has made it increasingly easier to manipulate text in digital images. Visual inspection cannot definitively distinguish the forgeries from authentic photographs. In the imaging process, as defocusing, atmospheric turbulence, diffraction and the defects of image device, digital image can't reproduce the details of texture perfectly, while the text...
Recently network virtualization is considered as a powerful way to overcome the current ossification of Internet, and is viewed as the keystone of the next-generation network architecture. In network virtualization, virtual network (VN) embedding problem, which assigns virtual nodes and links to physical network, plays an important role. Due to the scarcity of physical resource, efficient and effective...
In order to make the supply chain system to service the final customers on time, it needs to carry on the rational distribution to each operation time, but the cost-cutting of each operation time is different, so needs to seek the best time distribution scheme under the minimization of total cost. Considering the discrete and continuous relationship between the cost and time, the total operation time...
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