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Focusing on detection technology for autonomous underwater detection device which found marine target which radiated noise signal submerged in background noise, chaotic detector based on Duffing oscillator is researched. In this paper, the Duffing oscillator and chaotic detector based on Duffing oscillator are described. Through numerical simulation and theoretical analysis, it is proved that the...
This paper presents the design and implementation of a low power, wideband and high sensitivity CMOS power detector in 130 nm standard CMOS technology. It utilises a travelling-wave structure to achieve wideband input matching bandwidth from 7 GHz to more than 70 GHz. By biasing the power detectors in subthreshold regime, it achieves a measured peak voltage sensitivity of 75 dB at 7 GHz while maintaining...
We introduce scGAN, a novel extension of conditional Generative Adversarial Networks (GAN) tailored for the challenging problem of shadow detection in images. Previous methods for shadow detection focus on learning the local appearance of shadow regions, while using limited local context reasoning in the form of pairwise potentials in a Conditional Random Field. In contrast, the proposed adversarial...
Nb5N6 bolometer is a high sensitive terahertz detector at room temperature. The core part of traditional Nb5N6 bolometer is microbridge with a typical size of 3 μm × 12 μm. We have recently proposed a method using electron beam lithography (EBL) instead of UV lithography on fabrication of Nb5N6 micro bridge, which will reduce the size of the micro-bridge one to two orders of magnitude, the minimum...
In recent years Schottky-diode technologies gain influence in THz systems because of their large sensitivity, wide range, high power capability and room-temperature operation. Schottky diodes rectify the RF signal directly and therefore change their current-voltage characteristic. Considering the square-law detection for low-power and linear detection for high power, dynamic ranges of typically 90dB...
We report on a novel type of a room-temperature terahertz (THz) detector using a single walled carbon nanotube (SWNT) film, which is based on detection mechanism of the photothermoelectric effect. Enhancing difference in the Seebeck coefficient between two adjacent materials is a key technique for improving the detection sensitivity. In this work, we fabricated a p-n junction in the SWNT film by dropping...
We used a 4-N, N-dimethylamino-4'-N'-methyl-stilbazolium tosylate (DAST) crystal coupled with a Si prism to detect THz pulsed radiation in heterodyne electro-optic sampling scheme. The detection efficiency is higher than that for a DAST crystal without a prism, as well as for a LiNbO3 crystal with a Si prism.
In this work, the dosimetric performance of several Commercial Of The Shelf photodiodes was studied. They were tested against gamma rays from a teletherapy source and were characterized with the aim of building a one-dimensional array of dosimeters able to measure the the spatial distribution of dose in a radiotherapy irradiation field. An embedded system comprising an array of 40 photodiodes and...
Gated graphene has been used to realize a microwave power detector. A Corbino disc structure with Ti/Ag contacts has been fabricated on top of graphene deposited on P-type Si substrates with SiO2 gate oxides. This device exhibits power detection with a sensitivity reaching 0.87 mV/mW at a frequency of 433.92 MHz using lock-in detection at room temperature.
One of the most important issues that define the quality of life is the security and security of the people against the current threats mainly coming from terrorism. Traffic with narcotics and the irresponsible consumption of some drugs are also serious problems for humanity. The science and technology is on the permanent race to help authorities combat illegal activities such as explosives and narcotics...
The GEMINI front-end system that will operate at LoKI experiment at ESS is expected to be exposed to radiation for a Total Ionizing Dose (TID) up to 200krad during Triple-GEM detector usage. Analyzing the effect of ionizing radiation on chip gives important information on its robustness, critical for architecture validation. After irradiation with a total dose of 15 Mrad core elements of GEMINI channels...
The interest for more digital functionality in the readout circuits for imagers is growing rapidly. Similarly, there are advantages to having the pixel pitch smaller from visible to long wave IR. The front end is the dominant source of electronic noise for an in-pixel digital design. Limiting the real estate considerably would force the design to smaller feature size, which may worsen the random telegraph...
A wideband large dynamic range RF logarithmic power detector is presented in this work. The power detector is realized as a successive detection logarithmic amplifier and is fabricated using SiGe BiCMOS technology. The detector has a dynamic range of 64 dB and a sensitivity of −56 dBm at the center frequency of 1.5 GHz when considering a ± 1 dB error range. For the same error range, the dynamic range...
The sensitivity of a recently proposed spike detector exploiting the volatile properties of memristive device is optimised. A 200 nm × 200 nm TiOx memristive device in volatile region is biased with sub-threshold, unipolar and bipolar neural events. The input neural signal is pre-processed using different amplification settings. The resistive state response of the test device in response to the input...
This paper presents the study, manufacturing and characterization of a single-axis jet flow gyrometer. The operating principle of the device is based on the deflection of a laminar gas stream due to the Coriolis effect; it is then a gyrometer with no solid proof mass. A warm gas jet is generated by a micropump through a microfluidic channel opening into a cavity. Two temperature detectors are placed...
JavaScript has been the language for web applications, and the growing prevalence of web environments in various devices makes JavaScript web applications even more ubiquitous. However, because JavaScript and web environments are extremely dynamic, JavaScript web applications are often vulnerable to type-related errors and security attacks. To lessen the problem, researchers have developed various...
In computerized detection of clustered microcalcifications (MCs) from mammogram images the occurrence of false positives (FPs) varies greatly from case to case. In this work, we develop a probabilistic modeling approach to estimate the number of individual FPs present in a detected MC lesion. We describe the number of true positives (TPs) by a Poisson-Binomial probability distribution, wherein a logistic...
The cardiovascular disease is one of the most common causes of death around the world. The analysis of electrocardiograms (ECGs) is an important tool in early diagnosis of arrhythmias. However, sometime the measurement data would be corrupted by noises which may cause by the wrong equipment operation, poor contact of the electrode, or even the breath of the users. These noises would make cardiologists...
An improved version of effective diversity gain (EDG) evaluation system is proposed for multiple-input multiple output (MIMO) and diversity antennas. By enhancing the sensitivity of the RF power detection module and increasing rejection of background noises, measurements can now be conducted in actual propagation environments. The control computer is replaced with a laptop to improve system mobility...
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