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We have known that Ant Colony System (ACS) is one of powerful meta-heuristics and some researchers have reported the effectiveness of some applications using the algorithm. On the other hand, we have known that the algorithms have some problems when we employed it in multi-agent system and we have proposed a new method which is based on Max-Min Ant System (MM-AS), which is improved on ACS. This paper...
This paper describes one novel design procedure for acquiring an optimal fractional PID (FPID) controller that rejects load disturbance under constraints on robustness and performance. The parameters of FPID controller have been tuned by using particle swarm optimization (PSO). FPID, apart from conventional gains kp, ki and kd, has two more parameters α and β to be optimized, being the non-integer...
A highly sensitive optoelectronic receiver circuit is formed by combining a 100 μm diameter avalanche photodiode with an integrated transimpedance amplifier (TIA). Both main components are fabricated in a 0.35 μm standard silicon technology. The highly efficient avalanche photodiode which bases on a modified pin structure with a large detection volume is operated at 30 V reverse bias to obtain avalanche...
This document presents the results of investigation on a particular stress-compensated SAW resonator configuration allowing a strong improvement in g-sensitivity performance while keeping ultra-low noise characteristics. A specific oscillator architecture integrating two of these resonators is then described and tested. The final result is a 1GHz oscillator presenting unprecedented performances in...
Infrared Focal Plane Arrays have been developed with reductions in pixel size below the Nyquist limit imposed by the optical systems Point Spread Function (PSF). These smaller sub diffraction limited pixels allows spatial oversampling of the image. We show that oversampling the PSF allows improved fidelity in imaging, resulting in sensitivity improvements due to pixel correlation, reduced false alarm...
Design of robust power supply system to support DDR4 interface operating at 2400Mbps and beyond requires full consideration of supply noise impact on timing jitter in the system. Using relative jitter for DQ vs DQS and CA vs CK is critical and absolute jitter for CK is critical in optimizing the power supply system and deriving supply noise mitigation strategy.
This paper reports on the design and performance of a terahertz (THz) linear camera with 50 pW/√Hz noise-equivalent power (NEP). This camera is sensitive to four bands of vertically and horizontally polarized THz radiation (0.22, 0.32, 0.42, and 0.52 THz). The heart of the camera is a diode-based focal plane array (FPA) that has a 10 nV thermal noise level and 1–2 kV/W sensitivity across the four...
Organizations be it private or public often collect personal information about an individual who are their customers or clients. The personal information of an individual is private and sensitive which has to be secured from data mining algorithm which an adversary may apply to get access to the private information. In this paper we have consider the problem of securing these private and sensitive...
Social scientists who collect large amounts of medical data value the privacy of their survey participants. As they follow participants through longitudinal studies, they develop unique profiles of these individuals. A growing challenge for these researchers is to maintain the privacy of their study participants, while sharing their data to facilitate research. Differential privacy is a new mechanism...
Dual offset Gregorian reflector shaping can provide improved sensitivity performance by reducing radiometric noise and improving aperture efficiency. Optimizing the shaped system for optimum sensitivity performance is slow due to the full radiation pattern integration required to calculate the radiometric noise temperature. This paper shows that, in certain situations for a feed-down sub-reflector...
This paper introduces a system to accurately measure conducted out-of-band (OOB) noise of IEEE 802.11b/g/a/n/ac transmitter signals in cellular frequencies with a spectrum analyzer. The low-level (<160dBm/Hz) OOB noise measurement is usually limited by the dynamic range and the thermal noise of a spectrum analyzer. The proposed setup notches out transmitter signals, amplifies OOB noise and uses...
As data rate of serial interface has increased dramatically, timing margin has gotten tighter and tighter. Supply voltage has also kept deducing according to silicon process technology. However, supply noise is hardly reduced due to higher data rate, a huge number of transistors and slower improvement of packaging technology. Therefore, the jitter due to supply noise can be quite large compared to...
Non-intrusive load meters (NILM) with load identification ability are developed in several institutes and companies. A system for calibration of such meters is presented in this paper. The system can simulate an arbitrary current waveform of a home appliance. A tested NILM measured the waveforms and a load identification probability was stated.
Ultra-wideband capacitively coupled phased array antennas for low and mid frequency radio astronomy are presented. Two distinct and novel broadband techniques are employed for the candidate current sheet models. One of the arrays is designed to operate from 250 MHz to 1.3 GHz while the other functions from 50 MHz to 400 MHz. The radiating arrays comprise synthetic periodic aperture of fractal plates,...
An improved framework of power integrity analysis for core logic timing analysis is presented in this paper. Due to ever increasing power consumption of core digital blocks, jitter due to supply noise contributes a significant timing error, and on-chip logic timing analysis requires accurate modeling of supply noise induced jitter. Jitter information provides additional information to define precise...
This paper presents a study on noise transfer from receiver to transmitter circuits of high-speed tranceivers through a commonly connected power delivery network (PDN) on package or printed circuit board (PCB). Receiver circuits like decision-feedback equalizer (DFE) are power hungry and can generate lot of current on the PDN. Jitter and noise measurements are performed to quantify the amount of noise...
Memristor memories provide non-volatile and high density solutions that can overcome some of the challenges faced by CMOS technology. Memristor memories use the memristor as a resistor and depict a logic 1 by a high resistance state and a logic 0 by a low resistance state. Typically, the memristor's resistance range is divided in half, and a state falling in the lower half depicts a logic 0 and the...
The purpose of this study is to determine the performance of the working memory in processing visual stimuli based on the single-trial Event-Related Potential (ERP) signal. This signal was further analyzed using the logistic regression method to investigate children's working memory ability. This study involved 54 children aged 10 to 12 years old who were given computer-based visual stimuli while...
GaAs CCD readout circuit in this paper increases the integrating time up to 16 times by increasing the charge readout ability and no worry about degeneration of sensitivity. The readout circuit is composed of a pair of CMI pre-amplifiers, a counting unit, and a CDS, which use 0.35um 2P4M 5V technology. Simulation shows that the integrating time can easily break 250μs when the current flows out from...
We present an analytical model for the calculation of the sensitivity, the spectral current noise and the detectivity for an optically illuminated In 0.53 Ga 0.47 As n+nn+ diode. The photocurrent due to the excess carrier is obtained by solving the continuity equation. Moreover, the current noise level is evaluated at room temperature and under a constant voltage applied between the diode terminals...
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