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A 10 GS/s photonic sub-sampling ADC is proposed and experimentally demonstrated. The single-sideband phase noise of the optoelectronic oscillator is tested to be −128 dBc/Hz at 10 kHz offset and the aperture jitter of the photonic ADC is 40.3 fs with the integral interval from 1 kHz to 10 MHz. 23 GHz and 43.1 GHz signals are sampled by the system with the ENOB of 5.0 bits and 4.2 bits.
In polarimetrie filters, the adjacent pixels in the same neighborhood are regarded as possessing similar scattering mechanism, and these pixels in the continuous window are usually selected to do the averaging process when filtering the central pixel. Considering the different similarity between each neighbor pixel and the central pixel, the averaging process is given by a new definition and used...
Axial piston pump is very important in the hydraulic system, and its health affects the entire system directly The wear and tear of the port plate pair is the main reason for the decrease of the axial piston pump pressure and flow rate. Therefore, the degradation test of the cylinder with the flow port plate pair and the port plate is studied. The wear and degradation trend of the port plate pair...
Spectral unmixing is to decompose the hyperspectral data into endmembers and abundances. It has been known to be a challenging and ill-posed task due to the corruption of noise as well as complex environmental conditions. In this paper, we propose a part-based denoising autoencoder with unique structure that solves the unmixing challenges. The effective l21 norm and denoising constraints are applied...
Concatenated Greenberger-Horne-Zeilinger (C-GHZ) state is a new type of logic-qubit entanglement, which has attracted a lot of attentions recently. We propose a protocol for concentrating the less-entangled C-GHZ state assisted with an auxiliary single logic qubit. In this protocol, by utilizing the quantum nondemolition detection (QND) constructed by cross-Kerr nonlinearities, we demonstrate that...
The sub-frame which insulates the vehicle chassis from the high frequency excitation of the engine has a great influence on vehicle performance. Currently, the research on the influence of sub-frame on vehicle performance mainly aims at the vehicle vibration attenuation and noise reduction performance, and there is a lack of research on vehicle handling stability and the accurate description of the...
We demonstrate an ultra-compact polarization demultiplexer based on a plasmonic nanoantenna enabling polarization-selective directional light coupling into a silicon waveguide. Our antenna can spatially separate polarization-encoded optical signals for ultra-fast optical communication applications.
Recently, there is great interest of using P2P network in multi-source media streaming. In this paper, we present a self-adjustable scheduling algorithm for multi-source P2P media streaming, called feedback based scheduling algorithm (FBSA). FBSA is simple to implement, fully distributed, asynchronous, and can afford better quality of service. Furthermore, it can adjust itself automatically to adapt...
According to the characteristics of the transmission line, summarize and improve existing solar charging system, we developed an automatic solar charging system which can track the sun active used for transmission lines robot. The system includes solar charging system, automatic tracking solar system, quick connect-separate mechanism. Solar charging system include BOOST circuit, bidirectional BUCK-BOOST...
This paper gives a brief introduction of the state of art of robotics standardization. Based on the analysis of the electric power industry and robotics technology, a vision for electric power robotics standardization is presented. And related fundamental standards and specific robotic standards are developed as a case study.
Traditionally, insulator was cleaned manually which is high-risk, labor-intensive and low efficiency. In addition, it is impact of supply to clean insulator manually. Aim of solving the problem upon, a robot was designed for cleaning insulator which can make the clean work consistent and more reliable, and it can be operated at the highest voltage level of 345kV live-line. In this paper, mechanical...
In this paper, a new direction of arrival (DOA) estimation algorithm is proposed when uncorrelated and coherent wideband signals coexist. The proposed method estimates the uncorrelated signals and coherent signals respectively at two different stages. It makes the method resolve more sources than the array elements. Compared with the coherent signal subspace method (CSSM), the proposed method does...
Image pattern recognition is an important area in digital image processing. An efficient pattern recognition algorithm should be able to provide correct recognition at a reduced computational time. Off late amongst the machine learning pattern recognition algorithms, Artificial fish swarm algorithm is one of the swarm intelligence optimization algorithms that works based on population and stochastic...
DC withstand voltage test is essential for examining the insulation condition of converter transformers. But it's hard to identify the partial discharge under DC voltage since there's no phase information as under AC voltage. The acceptance criteria of the routine test is that discharge number which exceeds 2000pC is less than 30 during last 30 minutes and 10 during last 10 minutes according to standard...
Classical dictionary learning algorithms that rely on a single source of information have been successfully used for the discriminative tasks. However, exploiting multiple sources has demonstrated its effectiveness in solving challenging real-world situations. We propose a new framework for feature fusion to achieve better classification performance as compared to the case where individual sources...
Currently, robot learning of human activities is mainly studied in two largely disconnected domains: high level semantics understanding in human activity recognition, and low level motion trajectory reproduction in robot imitation learning. The critical problem of human activity unified learning (HAUL) was not well studied in previous work. One important challenge is the lack of a representation that...
This paper is devoted to the combination of several prior models in Bayesian image restoration and increasingly wide utilization in astronomical images. Bayesian methods introduce image models using prior knowledge and address the ill-posed problem in the registration parameter estimation. Employing a variational Bayesian analysis, we obtain a unique approximating distribution based on the observations...
Anomaly detection has been known to be a challenging, ill-posed problem due to the uncertainty of anomaly and the interference of noise. In this paper, we propose a novel low rank anomaly detection algorithm in hyperspectral images (HSI), where three components are involved. First, due to the highly mixed nature of pixels in HSI, instead of using the raw pixel directly for anomaly detection, the proposed...
Environmental control and life support system(ECLSS) of the manned spacecraft is an important system to guarantee the safety and life support of the astronauts and the environment inside the space station. For the physicochemical regeneration type of ECLSS(PRLSS), because of its complicated physicochemical process, to analyze and evaluate the mass balance and operation performance through simulation...
This paper introduces a novel nondestructive testing (NDT) method based on laser ultrasonic technology and fiber Bragg grating (FBG) sensors. A FBG sensor is employed as discrete sensing elements to detect the ultrasonic generated by pulsed laser. An all-fiber and adaptive acousto-ultrasonic (AU) monitoring system for the dynamic detection of impact damage is developed for the present work. A tunable...
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