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Cortisol, a hormone commonly released upon increased stress level, is a biomarker for numerous diseases and plays an important role in the regulation of various physiological processes. Normally a cortisol level is elevated in oral saliva during the time of anxiety and depression. A portable biosensor device could provide an interesting digital instrument to the patients and people who desire precautionary...
In this paper, we present a biosensor chip to study two important biomarkers, lactoferrin (LCF) and beta-2-microglubin (B2M) present in our tear fluid. LCF and B2M have direct relevance with dry eye syndrome and diabetic retinopathy in patients respectively. We have developed a multi-layer paper-based biosensor chip connected with handheld printed circuit board (PCB) to monitor the effectiveness of...
We experimentally demonstrate the measurements of the intra- and inter-spatial-modal polarization crosstalk in a polarization-maintaining few-mode optical fiber using optical time-domain reflectometry.
This paper is concerned with globally asymptotical synchronization of fractional-order memristor-based neural networks (FMNNs) with multiple time-varying delays. Based on the definition of memristors, a more practical model of FMNNs with multiple time-varying delays is constructed from the integerorder counterparts. FMNNs are represented by fractional-order differential equations with discontinuous...
To protect the structural feature and polarimetrie property in the speckle reduction of polarimetrie synthetic aperture radar (PolSAR) images, an improved speckle filter is developed based on a novel structural judgment and an improved four-components polarimetric decomposition (IFCPD) proposed from the Pauli decomposition and the Yamaguchi decomposition. The novel structural judgment based on the...
To decrease the initial investment of the compensation system in distribution networks, this paper proposes a cascaded distribution static synchronous compensator (DSTATCOM) integrated with D-y connection distribution transformer for reactive power compensation. The cascaded H-bridge DSTATCOM is connected to a group vertex-taps on the primary windings of the D-y connection distribution transformer,...
A quasi Z-source (QZS) network is coupled to the direct matrix converter (DMC) and a novel strategy of dual space vector modulation is proposed. It can effectively solve the defect of lower voltage transfer ratio of traditional matrix converter. The DMC which introduced the QZS can allow the three phase AC input side short circuit which defined shoot-through state. It can achieve the AC input voltage...
When fault occurs in hybrid transmission line, the complicated refraction and reflection effects may happen during the propagation of fault traveling wave, this can lead to the decrease of fault ranging accuracy. To increase the fault ranging accuracy, the traveling wave propagation characteristics of overhead line — submarine cable hybrid line are analyzed, and a double terminal traveling wave ranging...
For the purpose of saving energy, aiming at improving the weakness of traditional lighting system, such as wasting energy and poor flexibility, this paper designs an intelligent home lighting control system with STM32 as the control core and Wi-Fi and ZigBee as the communication mode. The system, through the three-way pulse width modulation(PWM) to achieve the tricolor LED light intensity and color...
With the arrival of 5G communication era, a large number of core network equipments and transmission equipments with high power density and high performance are used in the node rooms. In the era of 5G, there's a groundswell in the requirement of safety, stability and reliability for node room. At present, the main short board of the node room is the capacity of the power supply and air conditioning...
Human mobility pattern analysis are interesting and important topic which has become feasible nowadays by the flashing development of data collection and analysis platform technology. This paper leverages Call Detail Records(CDRs) data to analyze the mobility patterns of samples from Beijing residents. First, collective mobility and commuting patterns shows that Beijing residents are much busier than...
Human action recognition in video is highly challenging due to the substantial variations in motion performance, recording settings and inter-personal differences. Most current research focuses on the extraction of effective features and the design of suitable classifiers. Conversely, in this paper we tackle this problem by a dissimilarity-based approach where classification is performed in terms...
In this paper, the problem of stability for complex-valued neural networks involving both discrete and distributed delays is considered. Assuming that the activation function can be separated into its real and imaginary part, a sufficient condition is proposed for the asymptotical stability of the addressed neural networks by employing some analysis techniques. Finally, a numerical example is presented...
As the source of power producers and power systems, the safe and stable operation of power plants are related to the safety and quality of the entire power system. If the power plant is subjected to various types of over voltages without an effective and reliable precaution and failure to deal with the accident, it may affect the safety of the power system and regional power supply quality. If the...
Unsupervised learning with generative adversarial networks (GANs) has proven hugely successful. Regular GANs hypothesize the discriminator as a classifier with the sigmoid cross entropy loss function. However, we found that this loss function may lead to the vanishing gradients problem during the learning process. To overcome such a problem, we propose in this paper the Least Squares Generative Adversarial...
Both channel and phase noise blind recover are proposed and demonstrated to recover the orthogonal-frequency-division-multiplexing (OFDM) signal without using any training symbols or pilot subcarriers in direct-detection optical OFDM. The proposed receivers can achieve similar performance compared to conventional OFDM receivers.
In this paper, we proposed a novel approach to recover the profile of optical fibers on the focal plate. First of all, the spectra image is to be preprocessed. Then, the radon transform is utilized to simulate the inverse process of spectra imaging and collect each fibers' total flux from two-dimensional images which observed by LAMOST (Large Sky Multi-Object Fiber Spectroscopic Telescope). Next,...
A system based on fiber spectrometer was designed to detect the concentration of various artificial pigments contained in the solution. Using this system, the absorbance curves of five kinds of artificial colors of lemon yellow, sunset yellow, carmine, bright blue and amaranth were measured, and the absorption coefficient of each pigment at different wavelengths was calculated. The reliability of...
A polarization converter (PC) based on the mode coupling in a hybrid plasmonic waveguide (HPW) is proposed. This PC comprises a Si core, a low index insulator layer surrounding the Si core, and two asymmetrically arranged Ag strips. Two orthogonal hybrid polarization modes are excited within the low index insulator layer. By exploiting the mode characteristics of these two hybrid polarization modes,...
We investigate and analyze the asymmetrically clipped and direct-current-biased optical orthogonal frequency division multiplexing (ADO-OFDM) in visible light communication (VLC) system. Then we propose two modified channel equalization algorithms of ADO-OFDM in VLC systems. It is shown that the algorithm combined with channel estimation for interference cancellation to recover ADO-OFDM signal is...
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