Charles C. Chiang

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Given the enormous amount of detailed geometry information, the large number of local nets, and the ability to properly partition a design routing has been studied thoroughly to utilize parallelism intensively. In this paper we first discuss how to divide the routing space into regions that reduce run time and memory usage without scarifying the quality of(More)
In this paper, a nonlinear auto-companding wavelet approximation method is proposed for the behavioral modeling of analog circuits and applied to the behavioral modeling of a switched-current (SI) digital-to-analog converter. The companding function is automatically constructed according to the initial error distribution when approximating the input-output(More)
A distance metric of patterns is crucial to hotspot cluster analysis and classification. In this paper, we propose an improved tangent space (ITS)-based distance metric for hotspot cluster analysis and classification. The proposed distance metric is an important extension of the well-developed tangent space method in computer vision. It can handle patterns(More)
The purpose of this study was to characterize phenotypic characteristics of metabolically healthy but obese individuals with schizophrenia. Participants were non-diabetic outpatients 19 to 75 years old diagnosed with schizophrenia or schizoaffective disorder. Obese patients (body mass index (BMI)>30 kg/m(2)) were included in the present analysis. Patients(More)
In this paper, we develop a wavelet collocation method with multi-companding for behavioral modeling of analog circuits. In the multi-companding procedure, the nonlinear companding algorithm is developed to control the error distribution continuously, while the adaptive scheme is employed to reduce the number of used wavelets. Consequently, the proposed(More)
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