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We propose a voting-based pose estimation algorithm applicable to 3D sensors, which are fast replacing their 2D counterparts in many robotics, computer vision, and gaming applications. It was recently shown that a pair of oriented 3D points, which are points on the object surface with normals, in a voting framework enables fast and robust pose estimation. Although oriented surface points are discriminative...
Processing underwater acoustic signals for monitoring and classification are difficult problems that have recently attracted attention in the field of underwater signal processing. For these purposes, it is necessary to use a method which could be able to extract the useful information about the processed data. In this paper, an algorithm of extracting feature from radiated noise of underwater targets...
The design and fabrication of four-stage cascaded mm-wave low noise amplifiers (LNAs) in a 130 nm CMOS technology are presented. The simultaneous high stability factor and low noise figure are obtained using proper inductors in both gate and source of the transistor. Measured gain of 14.7 dB with a 7 GHz bandwidth has been achieved. The larger inductors are realized with microstrip lines to improve...
The method of experimental modal parameters identification using the complex modal theories is brought forward to analyze the dynamic parameters of the rotary compressor in order to reduce the noise of household electrical products. The compressor shell and the liquid-tank shell could also be dynamic modified so as to keep the compressor in lower noise by these parameters and the result of sound signal...
In order to obtain the feature parameters of a signal, the image ridge of time-frequency domain must usually be detected. In the paper, the PSO algorithm is applied to the detection of the transform-domain image ridge. A new ridge detection algorithm is proposed, together with its specific realization process. Furthermore, this method is simulated to evaluate precision of this and the robustness of...
Characteristic parameters identification of mechanical structure is an important part of modal analysis. These ridges can carry much information of system characteristic parameters. Recognition of the ridges in time-frequency space is addressed in this paper by making use of the so-called PSO (particle swarm optimization) technique. Furthermore, the simulation experiments are implemented in order...
Defect extraction techniques are studied regarding the silicon wafer surface defect. We design a new filter based on multiple structuring elements and suggest an improved marker-based and region merging watershed. To begin with, the filter which generalized close-opening and open-closing filter based on the morphological filter with multiple structuring elements is introduced to eliminate the noise...
The difficulty for accurate determination of the angles of arrival (AOA) of signals arises from the optimization of likelihood functions of high dimension. Usually, a gradient-based technique is employed to find the optimum of the function. However, this method requires heavy computational work and the differentiability of the likelihood function. This paper presents two gradient-free methods: One...
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