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The brushless doubly-fed generator (BDFG) has the advantages of brushless structure, variable-speed constant-frequency operation, flexibly controllable active and reactive powers, low converter capacity and cost, and so on, which is very suitable for the wind power generation, especially the large wind turbines and offshore wind farm [1].
This work presents an intelligent analog image sensor system for smart camera applications with the need of edge or marker detection. The system consists of a 3×3 read-out CMOS image sensor, an analog Sobel stage and additional circuitry like operational amplifiers and comparators to compute a 1 bit image with the edges present in the taken photo. This information can then be further processed digitally...
We study the spatial coherence properties of a system composed of periodic silver nanoparticle arrays covered with fluorescent organic molecule film [1]. The evolution of spatial coherence of the structure is investigated both in weak and strong coupling regimes by systematically varying the coupling strength between the localized molecular excitons and the collective, delocalized modes of the nanoparticle...
Gamma Ray Bursts (GRBs) are the strongest explosions in the universe which might be associated with creation of black holes. Magnetic field structure and burst dynamics may influence polarization of the emitted gamma-rays. Precise polarization detection can be an ultimate tool to unveil the true GRB mechanism. POLAR is a space-borne Compton scattering detector for precise measurements of the GRB polarization...
In industrial applications, particularly in vacuum ultraviolet applications and low-energy electron detection systems, a periodic surface cleaning of the used photon/electron detectors is required to prevent the buildup of carbon contaminating layers [1-3]. Such applications can be found in synchrotron measurements, space payload equipment, next-generation extreme-ultraviolet (EUV) lithography and...
The design and analysis of large antenna arrays bring great challenges for conventional numerical methods in computational electromagnetics. An efficient dual-primal finite element tearing and interconnecting (FETI-DP) method is proposed to deal with these challenges. It significantly improves the analysis efficiency by exploiting the geometrical repetitiveness of antenna arrays, and adopts a high...
With the increase of accelerator luminosity, the rate requirement for timing MRPC becomes important. Usually MRPCs are assembled with ordinary glass plates of 1.0 mm or thicker, but their rate capability is only about 200 Hz/cm2, which cannot afford to the future high rate requirement. DC model and a two dimensional resistor network model suggested that the rate capability of MRPC is largely dependent...
In order to realize polarization and aperture reconfiguration, an array based on dual-polarization multilayer micro-strip patch antenna is presented. Several polarization reconfigurable techniques and their properties are described. The dual-polarization antenna is introduced for its orthogonal polarization basis and geometry characteristic. It can accomplish several polarization measurement modes...
Visually Impaired Person or People (VIP) need to improve both orientation and mobility capabilities in order to be able to walk autonomously and safely using a white stick (cane). However, the feedback provided by an enhanced white stick (smart stick) does not integrate assistance to orientation and walking functions. This paper proposes to fill this gap and outlines the SEES (Smart Environment Explorer...
Recently, silicon-based ultrashallow junction p+n photodiodes fabricated by pure boron CVD technology (Pure-Bdiodes)[1][2][3] were evaluated for detection in the Extreme Ultra-Violet (EUV) spectral range spanning from 3 nm to 15 nm. A near-theoretical responsivity (0.265 A/W) [4][5] has been achieved at a wavelength of 13.5 nm [3], which is the operating wavelength of the next-generation lithography...
Representation of spaces including both geometric and semantic information enables a robot to perform high-level tasks in complex environments. Therefore, in recent years identifying and semantically labeling the environments based on onboard sensors has become an important competency for mobile robots. Supervised learning algorithms have been extensively used for this purpose with SVM-based solutions...
The undispatchability of wind farm presents lots of integration problems to safe operation of power system. Designing energy storage system for Dispatchability of wind farm is an effective integration solution. This paper presents a novel sizing method of energy storage system for dispatchability of wind farm with different confidence level. The forecast data of wind power is generated base on persistence...
Simulating the error performance of low-density parity-check (LDPC) codes usually takes a lot of computation time. Inexpensive graphics processing units (GPUs) have recently been used to accelerate the decoding process by allowing the smaller and identical tasks to be performed in a highly parallel manner. In this paper, we propose decoding a number of LDPC codes at the same time using GPUs. We show...
This study considers the discrete-time dynamics of a network of agents that exchange information according to the nearest-neighbour protocol under which all agents are guaranteed to reach consensus asymptotically. We present a fully decentralised algorithm that allows any agent to compute the consensus value of the whole network in finite time using only the minimal number of successive values of...
In industrial applications based on extreme-ultraviolet (EUV) radiation, a periodic cleaning of the surface of the used EUV photodetectors is required to prevent the build up of carbon contaminating layers [1][2][3]. Such applications can be found in synchrotron measurements, space payload equipment, next-generation EUV lithography [4]. One way to do this is to use aggressive gasses, such as hydrogen...
Ultrashallow Si p+n photodiodes fabricated in a pure-boron chemical-vapor-deposition (CVD) technology are investigated with respect to the relation between sensitivity to extreme-ultraviolet light and electrical performance (dark current and response time). The photodiodes are covered with a boron layer (B-layer diodes) which can be nanometer thin, allowing a quantum efficiency close to the theoretical...
Recently, silicon ultrashallow p+ n photodiodes, fabricated by a pure boron deposition technology (B-layer diodes), were evaluated for detection in the Vacuum Ultra-Violet (VUV) spectral range from 115 nm to 215 nm wavelengths, where the attenuation length in silicon is only a few nanometers. Superior sensitivity in the order of 0.1 A/W in the whole VUV spectral range was reported [1]. Next to the...
The dynamic performance of dc-dc power electronic converters is mainly determined by the output filtering capacitor and inductor, control loop(s) compensator(s), and the voltage conversion ratio. Normally, a larger capacitance and/or a smaller inductance are not recommended because of the extra cost and size of the capacitor and/or the increment of the inductor current ripple. The capacitor current...
Silicon p+n photodiodes fabricated by a pure boron deposition technology are evaluated for detection in the Vacuum Ultra-Violet (VUV) spectral range from 115 nm to 215 nm wavelengths, where the attenuation length in silicon is only a few nanometers. It is demonstrated that the junctions formed by the B-layer process are so ultrashallow that the photodiodes are able to provide a very good sensitivity,...
Extending metric space representations of an environment with other high level information, such as semantic and topological representations enable a robotic device to efficiently operate in complex environments. This paper proposes a methodology for a robot to classify indoor environments into semantic categories. Classification task, using data collected from a laser range finder, is achieved by...
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