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This paper reports a 3.0 THz detector which can detect the terahertz wave radiated by a quantum cascade laser (QCL) working at pulse mode. The detector was implemented in a 65 nm silicon CMOS process. The chip size is 1.5×l.5 mm2 including bonding pads. THz detector using FET is based on plasma wave theory proposed by Dyakonov and Shur which allows detection of THz radiations far beyond the FET devices...
Because the electric vehicle charging and discharging facilities is a complex electrical system, the factors that affect its energy consumption are very much. Firstly, the structure of electric vehicle charging and discharging facilities is studied, and the energy consumption of electric vehicle charging and discharging equipment is analyzed. Secondly, a set of energy consumption data acquisition...
The design of radar waveforms needs to deal with ambiguity resolution both in range and Doppler. Particularly, the waveforms of Pulse Doppler (PD) radars using low pulse repetition frequency(PRF) waveforms are unambiguous in range but ambiguous in Doppler. To solve the problem, the existing detection algorithms are mostly based on the Chinese Remainder Theorem (CRT), but these algorithms do not have...
In this paper, we study the link-oriented tasks in signed network, i.e., labeling link signs and predicting new links. Usually, prior arts directly focus on the link signs, while their intrinsic structural regularities have been largely ignored. Furthermore, these techniques suffer the sensitiveness to the high dimension and sparsity of networks. To deal with these tasks, with verifying the effect...
The modular multilevel converter (MMC) is considered to be the state of the art in medium- and high-voltage application. The nearest level modulation (NLM) method is one of the most popular modulations, however, when applied to MMC with small number of sub-modular (SM), the output waveforms contain large harmonic components. This paper proposes a modified NLM method. By changing the traditional rounding...
This paper proposes a novel design of low profile wideband artificial magnetic conductor (AMC) surface structure. The ±90° reflection phase bandwidth of the AMC surface is 7.93–12.23 GHz (S11≤ −10 dB), while the 0° reflection phase center frequency is 10 GHz. With the utilizing of the 6 × 6 AMC surface, a patch antenna can achieve a bandwidth enhancement of 233% and increased gain of more than 2 dB...
RF signal is ease to be interfered, which makes the signal of transmitting and receiving impure to impact on wireless communication. It is not to be ignored for interfering between transceiver signals in package of transceiver, thus, insulating enough must be taken. In addition, the mount of noise introduced through a main interference source being from contribution of digital signal continuously...
At present, it is a common phenomenon that people use a mobile phone while driving, which brings hidden troubles for driving safety. This paper summarizes situation of mobile phone use in driving through literature, questionnaire survey and scenario analysis. Survey finds that over 70 percent of the drivers have this behavior and 9 percent of them has a traffic accident due to the use of mobile phone...
This paper presents a rotary table-mounted synthetic aperture radar (SAR) system with linear frequency modulated continuous wave (LFMCW) for target detection. A SAR imaging algorithm and a spatial processing procedure are combined to detect drones at unknown positions. The beat signal at the receiver is used to alleviate the high-speed sampling and the high resolution requirements for signals with...
Reliability is a key challenge faced by the fastgrowing photovoltaic (PV) power plants. This paper presents fault diagnosis and classification techniques using the PV plant operational data collected from the supervisory control and data acquisition (SCADA) system. Specifically, the proposed solution consists of three techniques: (1) a new statistical fault detection method; (2) a corrective performance...
Tail bits in the RESET process influence the distribution of resistive parameters, and will dramatically decrease the uniformity in high electric stimuli region. In this study, such phenomena can be explained as non-uniform distribution of defects in the insulating layer and high defects density in the bottleneck region of conductive filament (CF). Then departing from defects' distribution function,...
Resistive Random Access Memory (RRAM) can be regarded as a promising candidate on the manipulation of both electrical and magnetic properties. There is a widespread concern about the electrical manipulation of magnetic properties in RRAM devices. In our work, Co/HfO2/Pt RRAM device with magnetic conductive filament (CF) is designed and fabricated. Then the anisotropic magnetoresistance (AMR) effect...
Mobile delay tolerant network (MDTN) is a kind of no stabilized end-to-end connection network and has the characteristics of long time delay and intermittent interruption. To forward a network packet, MDTN relies on the relay nodes, using the “store — carry — forwards” routing method. However, nodes will be selfish and unwilling to forward messages for others due to the limited resources such as energy,...
Its obviously that OpenStack provides the biggest Cloud Computing platform. However the virtualization network service of Neutron, one module of OpenStack for network management, it can only realize simple management of networking, and Neutron which is based on SDN spirit also has defects in complexity of operation, more or less the uncontrollability of Neutron flows. The SDN paradigm is a perfect...
In order to ensure the security of mobile ad hoc networks (MANETs), the research on certificateless key management scheme is attracting more and more attention. The certificateless key management scheme can well resist the key escrow problem and it is very suitable for MANET, which is source-constrained and has no public key infrastructure. In this paper, we give an overview of some recent certificateless...
The edges of shadows are blurred in Synthetic Aperture Radar (SAR) images due to the moving of the radar when data are collected. This phenomenon becomes obvious in High Resolution (HR) SAR images. In this work, an adaptive approach for shadow enhancements is proposed. The performance of the shadow enhancement has some relationship with the precision of the estimation of the height and this rule is...
Accurate anomaly diagnosis is essential for reducing operation and maintenance (O&M) cost, while improving safety and reliability of large-scale photovoltaic (PV) systems. Although many methods have been proposed, they either require extra sensing devices or suffer from high false alarm rates. In this work, we present a cost-effective hierarchical context-aware method for string-level anomaly...
Robust validation of the ensemble precipitation datasets was vital for assessing and then improving the quality and confident application in water energy cycle related research. In this study, the performance of the Ensemble Multi-Satellite Precipitation Datasets using the Dynamic Bayesian Model Averaging scheme (EMSPD-DBMA) was evaluated and compared against the rain gauge networks, as well as the...
A microfluidic flowmeter is proposed based on graphene integrated “hot-wire” structure. A long-period fiber grating (LPFG) is written in a single mode fiber by CO2 laser to excite the higher-order mode. Graphene is coated around the grating to absorb the higher-order mode and generate the heat. The fiber is sealed into a home-made tube. When the microfluid flows through the graphene, the heat is taken...
High-resolution satellite imagery data have been widely used in geoscience and remote sensing research. Dealing with data quality issue is the first and most important step before truly making use of these high-resolution images. Scientific results derived from poor-quality data can be problematic and unreliable. In this work, we propose a novel data quality screening method to discover and filter...
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