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A three-lead electrocardiogram acquisition system is constructed with an analog front-end circuit (ADS1293), a microprocessor (MSP430X), and a personal phone or computer. The acquired three-lead (namely, Lead I, Lead II, and Lead V1) ECG data can not only be displayed on a personal computer by a MATLAB simulator but can also be stored in the cloud.
Remote electrocardiograph (ECG) monitoring systems are gaining increasing attention with the progress of time. However, the traditional heart rate calculation formula has numerous limitations. This study presents a simple and rapid algorithm for heart rate calculation. This algorithm can provide an approximate heart rate even when the ECG signal contains noise. When this formula is used in an ECG...
This study presents a single-loop, third-order, low-power, high-precision, switched-capacitor delta sigma modulator (DSM) for a portable electrocardiogram (ECG) acquisition device. Several techniques, including modified feedforward structure, gain-enhanced current mirror operational transconductance amplifier (OTA), and dynamic comparator, are adopted to improve signal-to-noise ratio (SNR) and reduce...
In recent years, random caches have been proposed as a way to simplify the timing analysis of real-time systems. However, technology-scaling makes caches prone to faults. Fault detection mechanisms can detect permanent faults but they affect the timing analysis of a random cache. This paper introduces a Static Probabilistic Timing Analysis (SPTA) technique that accounts for a permanent fault detection...
In mobile communication system, moving terminals have to switch to the network access points frequently due to the flexible mobility of Mobile Station (MS). How to provide an efficient low-cost and real-time service for MS is an important subject of mobility management. Different from the traditional static location management model, a novel dynamic model, based on prediction of users behavior, is...
This paper concerned with the adaptive tracking control problem of an adaptive model-based fuzzy-neural networks (FNNs) sliding mode control (AFSMC) scheme for a class of nonlinear systems, which are represented by Takagi-Sugeno (T-S) fuzzy model to express a nonlinear systems model. Then, an adaptive parameter estimator is proposed to estimate the unknown nonlinear system parameters. Considering...
Serious tungsten corrosion after tungsten chemical mechanical planarization (W CMP) is found to correlate to the high via resistance. According to via design layout analysis, the W plug recess is strongly dependent on the underlying metal line area and via hole size. The via W plug recess becomes worse as via size shrinkage and underlying metal line area increasing. The low corrosion W polishing slurry,...
This paper presents the methods of eliminating the plasma-induced Si substrate damage in periphery regions, resulting from high aspect ratio etching process for 3D NAND fabrication. The impact of Si substrate damage is verified by the low and high bias power experiments. The result indicates more Si damage is present with high energy bombardment; therefore, high bias power is recommended to be inhibited...
This paper presents the methods of eliminating the plasma-induced Si substrate damage in periphery regions, resulting from high aspect ratio etching process for 3D NAND fabrication. The impact of Si substrate damage is verified by the low and high bias power experiments. The result indicates more Si damage is present with high energy bombardment; therefore, high bias power is recommended to be inhibited...
We present several efforts for arcing reduction during high aspect ratio etching. Strategies including pulsing etching adjustments, ex situ multi-cyclic etch approach, flush step incorporation, E-chuck voltage operation, cap material, etc. are explored. The details are discussed in the paper.
A new concept is presented that extrinsic Fabry-Perot interferometer (EFPI) sensors are designed to detect partial discharge (PD) in liquid insulation, and numerical simulation is used to analyze the distribution characteristics of acoustic emissions generated by partial discharge. The sensing head of EFPI mainly consists of an optical pigtail and a thin silica glass diaphragm. Based on wave propagation...
We present several efforts for arcing reduction during high aspect ratio etching. Strategies including pulsing etching adjustments, ex situ multi-cyclic etch approach, flush step incorporation, E-chuck voltage operation, cap material, etc. are explored. The details are discussed in the paper.
For the applications of WPT technology in high temperature environment, the parallel current sharing technology is introduced into the WPT system to solve the high loss problem of the DC-DC converter link, so as to inhibit the rise of the temperature in system. In this paper, a small signal model is established for DC-DC parallel system. Based on the output current feedback method, the equations for...
This paper presents a front-end ASIC for forward-looking intravascular ultrasound (IVUS) imaging. The ASIC is intended to be mounted at the tip of a catheter and can interface a total of 80 piezo-electric transducer elements with an imaging systems using only 4 cables, thus significantly reducing the system complexity compared to the prior art. It is capable of switching high-voltage transmit pulses...
We have developed a new methodology with statistical simulation of leakage current resulting in Vt shift over time of tail bit for assessment of the susceptibility to data retention in floating gate flash memories. The statistical simulation results of Vt distribution are verified with measurements of programmed bit in actual product with good agreement. The new methodology can effectively predict...
Data pertaining to the availability of parking slots is crucial to the efficient operation of systems designed to monitor the state of parking spaces. Outdoor parking systems have been developed using wireless sensors, Internet of Things (IoT) technology, and cameras. Unfortunately, interference from electromagnetic fields complicates the tuning of parameters for detection algorithms and limits accuracy...
Greenhouse gas emission by the increasing number of vehicles have become a significant problem in modern cities. To save energy and protect environment, recommending fuel-efficient routes to drivers becomes a promising way to alleviate this issue. To this end, in this paper, we present a novel fuel-efficient path-planning framework called GreenPlanner, which contains two phases. In the first phase,...
An extended infrared photoresponse is observed in a high quality InN pillar/p-GaN photodetector with self-assembly epitaxy grown by LP-MOCVD. The IR portion photocurrent as high as 14.2% can be measured via AM1.5G solar simulated spectra.
A vehicle's fuel consumption is strongly related to both its loading and the driver's driving behavior, such as aggressive/tender acceleration, improper/proper gear change or running/stopping the engine while waiting. This paper introduces EasyRoute, an economical route recommendation system for modern vehicles, implemented in smartphones, to improve fuel efficiency. EasyRoute senses the vehicle's...
As for the treatment of the household waste on offshore work platforms, the design of a repeatable foldable waste disposal robot of the marine was put forward. According to its design requirements and function analysis, it was divided into four modules, the compact module, the thermal drying module, the delivering module and the solar energy module. The repeated foldable modules including the thermal...
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