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The noise of the main parts of high pressure common-rail diesel engine was analyzed in this article. The near-field noise of main parts of diesel engine was measured at different speed and load conditions. The major impact components on the engine noise were covered with composite materials, and the noise was measured. The noise of different fans on the diesel engine was analyzed. The results show...
It is greatly significant to detect harmonic accurately and effectively for improving the quality of electric energy in the power system. Actually, much noise exists in signal besides harmonics, inter-harmonics, so the key is how to detect harmonic signals from the complex power system. According to the analysis of harmonic and noise, a new method is proposed in the paper to detect harmonic based...
This work presents a new simple passive 3D stylus and its associated stroke reconstruction algorithm for capacitive touch panels that detects the -directional position and -directional strength without the help of a pressure sensor. The proposed algorithm can successfully detect touch information while eliminating noise. Moreover, unintended touch will be recognized and its effects are eliminated...
Super-resolution (SR) reconstruction produces one or a series of high-resolution images from a series of low-resolution images. In this paper, we apply the regularization-based SR image reconstruction method on the basis of multi-frame image SR. Fisrstly, a linear observation model is utilized to associate the recorded LR images with the unknown reconstructed HR image estimates, and we apply the bilateral...
A spread-spectrum clock generator (SSCG) with self-calibration circuit (SCC) is presented in this paper. By the use of self-calibration scheme, exploited the proposed linear circuit and a SCC, the gain of Kvco can be effectively reduced and the jitter performance is improved. Moreover, the proposed architecture provides an alternative technique for low Kvco instead of the commonly used methods for...
In this paper, the harmonic-plus-noise model (HNM) based speech signal synthesis scheme studied previously is further extended to provide the function of speaker nonspecific timbre transformation. To transform synthetic speech's timbre, we have developed a formant based frequency mapping method called piece-wise linear frequency mapping (PLFM). In addition, a commonly adopted method is frequency axis...
Web forums contain a wealth of information resources. Forum data can be widely used in areas such as Internet community mining, information retrieval and public opinion analysis and so on. This paper solves the problems of what should be extracted and how to extract from the Web forums. Aimed at the limitation of current methods to extract data from Web forums, an automated method is proposed to extract...
This paper presents a new digital compensation scheme for MASH (cascaded) sigma-delta modulators (SigmaDeltaMs) with 1-bit quantizer. The compensation scheme is designed based on the well-known internal model principle and H-infinity control theory. For numerical illustration, we concentrate on a MASH 2-1 SigmaDeltaM architecture for low and middle frequencies applications. Comparisons between the...
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