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Cuff-less blood pressure (BP) estimation using pulse transit time (PTT) is a promising method for long-term BP monitoring. However, state-of-art PTT models are unable to trace the change of pressure baseline in subjects, which limits their application in long-term BP tracking. This study investigated the relationship between the change of pressure baseline and pulse waveform in long-term BP monitoring...
Proteins from the same family have similar functions. Hence, it is important to discover from a protein family conserved sequence patterns with variations to unveil the functionality of a functional domain. Aligned Pattern Clusters (APCs) are knowledge-rich representations comparing with probabilistic models. If significant aligned residue associations (ARAs) were discovered in APCs, they could reveal...
We introduce the transverse waveguide-mode degree of freedom to quantum photonic integrated circuits, and demonstrate the coherent conversion of a photonic quantum state between path, polarization and transverse waveguide-mode degrees of freedom on a single chip.
Accelerated degradation test is an efficient approach to evaluate the reliability of degradation products. An effective accelerated test must guarantee that the failure mechanisms of product under all accelerated stresses are consistent with that under the normal stresses. Otherwise, the reliability of product under the normal stresses cannot be accurately extrapolated from accelerated degradations...
Visible Infrared Imaging Radiometer Suite (VIIRS) land surface albedo (LSA) product is one of the routinely generated VIIRS environmental data records (EDR). A direct estimation approach based on radiative transfer simulation was developed to directly estimate instantaneous LSA value from VIIRS clear-sky top-of-atmosphere (TOA) reflectance. Comprehensive validations and evaluations were performed...
Personal photographs shared in social network websites show a wide range of variations in illumination, pose and expression. As a result, conventional face recognition methods show poor performance in such uncontrolled setting. To resolve this problem, we explore incorporating associated social network context into visual face recognition system. Motivated by collaborative filtering technique, a new...
In this paper, we propose a framework to register images with very large scale differences by utilizing the point spread function (PSF), and apply it to register hyperspectral and hi-resolution color images. The algorithm minimizes a least-squares (LSQ) objective function with an incorporated spectral response function (SRF), a nonrigid freeform deformation applied on the hyperspectral image and a...
The crosslinked polyethylene (XLPE) extruded cables have been widely used in the HVDC power transmission system. The presence of semiconductive layers in the XLPE cables plays an important role on the charge injection and uniform distribution of electric field. In this paper, the supersmooth, extra clean semiconductive materials were prepared by melting blending through a reciprocating single-screw...
Linear feedback control systems (LFCS) are amenable to numerous object recognition and detection tasks on account of its functional properties in signal filtering and error correction. In fact, there exists an intimate relationship between control states and salient values. Therefore, we propose a novel semi-supervised classifier which makes use of linear feedback control theory to improve saliency...
As an insulating material, epoxy resin is widely used in the power system. However, its surface charge accumulation and decay behaviors have been the key problem restricting the development of high voltage direct current power equipment. In this paper, pure epoxy and several kinds of epoxy composites were used. And the relative permittivity, volume resistivity and surface resistivity of the insulating...
Radio-Frequency Identification (RFID) systems are becoming increasingly used within smart environments. In this paper, we propose BitID, a passive Ultra-High Frequency (UHF) RFID based sensing technique that can easily be made using off-the-shelf tags. BitID can be added to everyday objects to enable sensing and control capabilities. With a simple shorting mechanism, BitID is able to differentiate...
The effect of the irregular air-water interface on the performance of the down-link quantum key distribution from the air to the sea is studied. Based on the analysis of the relationship between the incident angle and the quantum bit error rate, the air-water interface model with wind speed is adopted, the influence of the wind speed on the incident angle of the photon is discussed, the relationship...
YARN (Yet Another Resource Negotiator) is an emerging resource management system in Hadoop platform which can process big data in the scale of petabytes/day. YARN, as a resource management system, needs manage all kinds of resources in the clusters, such as cpu, memory, disk io, network io and so on. At present, YARN mainly focuses on computing resource and storage resource (CPU and memory), while...
In this paper, we propose an improved image fusion algorithm, which uses structural similarity to match the local energy of images. The local energy method can reflect the complemen-tarity between different types of images. But for grayscale images and infrared images which have very different intensity, the fusion between them can produce dark spots in the result. To avoid this, we introduce a structural...
A vehicle-mounted continuous wave radar slot array antenna based on substrate integrated waveguide (SIW) is proposed in this paper. The antenna is designed with 8 × 12 slot array with tree-shaped power divider. The measurement results show that the E-plane sidelobes of proposed array antenna are less than −25 dB and the H-plane sidelobes are less than −30 dB at the working frequency of 24 GHz. The...
High-resolution, low-power radiation-tolerant ADCs are under great demand from medical, aerospace and high-energy physics applications. In the ATLAS Liquid Argon Calorimeter of the LHC experiment at CERN, the radiation operation condition coupled with the large dynamic range (>12b ENOB), 40-80MS/s sample rate and low power (for cooling system requirement) specs [1] make the design of such ADCs...
Frequency up-conversion of heralded single photon OAM states from 1560 nm to 525 nm is presented. Non-classical correlation and coherent properties are preserved in the up-conversion process.
A transcoder for interfacing light with orbital angular momentum (OAM) and time-binning, by which light with an arbitrary OAM superposition is experimentally converted into a time-bin Gaussian pulse and in principle vice versa.
With the development of the technology, life is filled with increasing information equipment. When they work, a great deal of information will be radiated. For the leaked information, an interception system is built with USRP (Universal Software Radio Peripheral), and the line synchronization signal was extracted with a method called cepstrum. Compared with the method of autocorrelation, the new method...
Maximizing the lifetime is an important issue in the design of applications and protocols for wireless sensor networks (WSNs). Clustering sensor nodes is an effective topology control approach helping achieve this goal. In this paper, we present an energy efficiency protocol to prolong the network lifetime based on an improved particle swarm optimization (PSO) algorithm. The protocol takes both energy...
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