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Doppler radar has been used to search survivors buried under earthquake rubble by contact-free detection of respiration signals. However, the respiration signals were minute and easy to be polluted by noise from moving-object around the survivor such as swing of flowers, leaves and bushes. In order to restrain the noise and improve the signal-to-noise ratio (SNR), the Adaptive Line Enhancer (ALE)...
Being capable of detecting vital signs of human beings, impulse radio ultra wideband (IR-UWB) radar can be applied to search and rescue (SAR) operation in post-disaster scenarios to detect trapped survivors under collapsed buildings. In the application, IR-UWB radar systems with a low center frequency are commonly used to guarantee good penetrability. These systems transmit pulses with nanosecond...
This paper proposed a LMS adaptive harmonic cancellation algorithm, in order to effectively separate the breathing and heartbeat signal from biological radar, so that the physiological characteristic parameter (respiration rate and heart rate) can be real-time monitored. The harmonic combination of the respiratory signal is regarded as reference input of the model, and the bio-radar body motion signal...
The differences of between mild cognitive impairment (MCI) and normal control group (NC) of N-acetylaspartate (NAA), creatine (Cr), choline (Cho) and the metabolism ratios in hippocampus were investigated. Thirty healthy control subjects (16 males and 14 females) and thirty patients (20 males and 10 females) with MCI were recruited from the local area. Conventional magnetic resonance imaging (MRI)...
With extensive application of infrared detective techniques, Stirling cryocooler, used as an active cooling source, has gained a good chance to prosper because of its special advantages, such as the variability of cooling capacity, compact configuration and non-sensitivity for the satellite attitude. After the cooler's cooling performance can satisfy the mission's request, its reliability level is...
It has been proven that the cardiopulmonary signs, including respiration and heartbeat signal, can be contact-free measured via a Doppler radar. However, the heartbeat signal cannot be identified when the human subject does not hold his or her breath. To resolve the problem, the adaptive noise canceller (ANC) based on recursive-least square (RLS) algorithm is presented to simultaneously measure the...
This paper proposes a simple and symmetrical scheme for the prediction and update operators in quincunx lifting, which is then applied into image coding based on Embedded Zerotree Wavelet (EZW) algorithm. In addition, we present a new strategy for taking quantization threshold by combining the power of 2 with the square of integer. The former is used for image coding at higher bit rates and the latter...
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