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Among various kinds of image denoising methods, the Perona–Malik model is a representative Partial Differential Equation based (PDE-based) algorithm which effectively removes the noise as well as having edge enhancement simultaneously through anisotropic diffusion controlled by the diffusion coefficient. However, the unstable behavior of the Perona–Malik(More)
Based on deducing the gain error's formula of noninverting amplifier, MathCAD was used to analyze the influences of real opamp's nonideal parameters. Result shows: For the modern opamps whose open-loop gain is larger than 120dB, the optimal value of feedback resistance Rf can be settled in a very wide range which is 3–5 orders of magnitude, but Rf(More)
Estimating the ego motion is a key problem for a mobile robot, its efficiency and precision are hard to be balanced. In this paper, a fast and accurate approach is proposed to estimate the ego motion of stereo camera. Firstly, two images from left and right cameras are rectified. secondly, a index is introduced to speed up the matching process to find(More)
Asian leaf-eating monkeys have flexible, environmentally adaptable feeding strategies. The diet and food choices of white-headed langurs (Trachypithecus leucocephalus) have, however, not yet been studied in the Nongguan Karst Hills in China, where one of the two main surviving populations of this endangered species lives. From 2000 to 2002 inclusive, we(More)
Reports a method of design low-pass filter. Based on analyzing the error isogram of the Voltage-controlled Voltage Source(VCVS) 2nd-order Low-pass filter's parametric equation by MathCAD, the paper put forward that VCVS unit gain Butterworth f0 Hz Low-pass filter optimal design plan: firstly, select two capacitances C1 and C2, making C2/C1 0.5; and then(More)
A major goal of vaccines is to induce functional immune memory, and efforts to improve the efficacy of vaccines targeting memory CTLs have revealed an important immunoregulatory role of rapamycin, a specific mTOR inhibitor. While inflammatory cytokines are critical for memory CTLs formation, it is unknown if cytokines such as IL-12 mediate rapamycin's(More)
Fast-continuous-rotation is an effective measure to improve the scanning speed and decrease the radiation dose for cone-beam CT. However, because of acceleration and deceleration of the motor, as well as the response lag of the scanning control terminals to the host PC, uneven-distributed and redundant projections are inevitably created, which seriously(More)