Cheng-Chi Tai

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Nondestructive analysis (NDA) is one of the most important tasks that is performed during the industrial characterization of integrated circuits (ICs) because even a tiny defect or failure in the IC packages could be disastrous from the standpoint of quality control. To detect an interconnection failure in IC packages, a time-domain reflectometry (TDR)(More)
This paper proposes a new method improving the peak quantification algorithm (PQA) introduced by Navakatikyan, et al. In measuring a human heart rate (HR). Experiments reveal that although the PQA can accurately measure the heart rates based on electrocardiogram (ECG) waveforms, this algorithm is too complex and uses too much memory, resulting in(More)
Crack inspection is a critical issue in quantitative nondestructive evaluation (NDE). The eddy current (EC) method is effective for surface discontinuities detection, but the spatial resolution of conventional EC method is constrained by the size of EC probe. The photoinductive (PI) imaging method is a NDE technique that combines EC and laser-based thermal(More)
AND and NAND logic gate based on the negative differential resistance (NDR) device is demonstrated. This NDR device is made of metal-oxide-semiconductor field-effecttransistor (MOS) devices that could exhibit the NDR characteristic in the current-voltage curve by suitably arranging the MOS parameters. The devices and circuits are implemented by the standard(More)
This article reports on the design and development of a complete, programmable electrocardiogram ECG generator, which can be used for the testing, calibration and maintenance of electrocardiograph equipment. A modified mathematical model, developed from the three coupled ordinary differential equations of McSharry et al. IEEE Trans. Biomed. Eng. 50, 289,(More)
As the high-voltage power cable insulation material growing worse, the aged insulation material can cause serious power supply problems. Most of the damages can be found in cable splice and cable terminators. This article mainly aims at developing the inspection methods for cable joints problem. We investigate the use of acoustic emission (AE) sensor,(More)
BACKGROUND AND OBJECTIVE In this study, we developed a computer controlled treadmill system using a recurrent fuzzy neural network heart rate controller (RFNNHRC). Treadmill speeds and inclines were controlled by corresponding control servo motors. The RFNNHRC was used to generate the control signals to automatically control treadmill speed and incline to(More)
The aim of this study involved developing a temperature controller for magnetic induction hyperthermia (MIH). A closed-loop controller was applied to track a reference model to guarantee a desired temperature response. The MIH system generated an alternating magnetic field to heat a high magnetic permeability material. This wireless induction heating had(More)