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We present a filter to detect the edge of potential-field image. The filter is computed in the space domain using a simple nine-point convolution filter basing on the ratio the total horizontal gradient and the total gradient. The filter is to apply edge-detection as a useful tool for potential field interpretation on synthetic data. Finally, the proposed filter is applied to a field example from...
This paper presents an experimental study of transient photovoltage induced by the pulsed laser excitation in the HgCdTe pn junction photodiode. The excitation light source is a wavelength-tunable pulsed infrared laser. The photo-response shows an apparent negative valley during the first then evolves into a positive peak. An obviously magnitude decreasing of the negative valley can be observed as...
This paper presents a minority carrier lifetime extraction method using transient photovoltage method. The excitation light source is a picosecond pulsed infrared laser. A parallel resistance has been introduced to minimize the effect of the equivalent junction series resistance effect. A storage oscilloscope has been used to record the photovoltage of the photodiode. By fitting the exponentially...
According to the axiomatic definition of fuzzy degree on intuitionistic fuzzy sets, an exponential fuzzy degree is presented. Based on this, an exponential entropy on intuitionistic fuzzy sets is given, and the effectiveness of the entropy is verified by applying it to the multiple attribute decision algorithm.
Infrared thermography, which has been widely used, is an important electrical equipment monitoring and fault diagnosis technology. It has two key steps about infrared thermal image processing and artificial intelligence diagnosis faults. In order to improve the accuracy of diagnosing electrical equipment thermal fault, the algorithms of denoising, segmentation and feature extraction in image processing,...
Fuzzy theory can reduce the uncertainty dealing with problems because of the features of its semantic variables. It has been widely used in various fields, especially in load forecasting. We will firstly introduce the definition of fuzzy time series, and then a new method is applied to load forecasting. This method has not been used to do load forecasting and it has a wide developing future. At last,...
This paper presents an experimental study on the dispersion dependence of two-photon absorption (TPA) between 0.689∼0.912 eV in a Si-base PIN photodiode. The obvious TPA process is clearly observed as the nonlinear enhancement of peak photoresponse on the incident light intensity in the power of 2. The tendency of the TPA coefficient increases with the incident photon energy increasing. The maximum...
Aggregation-induced emission (AIE) organic molecule 4,7-Bis[4-(1,2,2-triphenylvinyl)phenyl]benzo-2,1,3-thiadiazole (BTPETD) was used as a top emitter on GaN-based light-emitting diode (LED) to produce white light. The fabricated hybrid organic/inorganic LED shows CIE coordinates of (0.32, 0.33) and 45.4% optical extraction efficiency from BTPETD layer with pump leakage of 17.3%. At driving current...
This paper presents an experimental study of minority carrier lifetime and recombination mechanisms in HgCdTe photodiode. The excitation light source is a wavelength-tunable pulsed infrared laser. A constant background illumination has been introduced to minimize the effect of the junction equivalent capacitor and the equivalent series resistance. The slow decay of the photo-generated voltage is recorded...
The changed polarity of transient photovoltage (TPA) from negative to positive induced by ultra fast lasers illumination is studied in the HgCdTe p-n junction photovoltage detector. The negative photovoltaic-response decrease obviously and even disappear by blocking the laser beam with an aperture to limit the illumination area of the linear array detectors. A combined theoretical model of p-n junction...
Tetraphenylethene-containing polyynes with aggregation-induced emission characteristics are synthesized. The polymers are highly transparent in the entire visible spectral region and show high refractive indices (n = 1.7787−1.6543) in a wide wavelength region of 400–1700 nm.
In this paper a new 3D model is proposed to simulate the grain boundary migration during hot finishing rolling of thin strip with Monte Carlo method. The hot rolling of thin strip is simulated by thermo-mechanical coupled finite element method. The temperature of nodes in simulated region is picked from the FE data results. In the present work the temperature history is applied to the boundary conditions...
PWM rectifier technology is introduced to the main Power Circuit of the charger for aircraft battery to enhance the charging efficiency of aircraft battery and improve its long term reliability and save its life in this paper. A new strategy of DPC Based on the Space Vector Modulation (SVM) is used in PWM rectifier, Meanwhile, a fuzzy PI controller is designed in DC voltage control loop. The simulation...
A viable and affordable real-time and online control technology named remote production dashboard (RPD) for discrete manufacturing process based on knowledge service is proposed. Firstly, the basic framework of RPD consisted of production environment layer, data process layer, knowledge service layer and man-machine interaction layer is constructed. Secondly, the principles of two key technologies...
Distributed control system based on the multi-agent system has good extension and opening and reconstruction. For great experiment equipment, a mode of distributed control software system based on the multi-agent system is advanced. The configuration of single agent and collaboration of multi-agent is introduced. Arithmetic of Control flow which is core of control software, is particularly designed.
The nonlinear load, impact and power imbalances as a result of serious pollution of the characteristics with the grid. The traditional method of active filter control systems rely on accurate mathematical model and has poor robustness, It is difficult to obtain good control performance. A shunt three-phase active power filter based on fuzzy-sliding mode variable structure control. It is modulated...
It has been a textbook knowledge that chromophore aggregation generally quenches light emission. Here, we present an opposite phenomenon termed aggregation-induced emission (AIE) and identified the restriction of intramolecular rotation as a main cause for the AIE effect. Based on the mechanistic understanding, we explored the technological applications of the AIE luminogens as light-emitting and...
Exclusion Basis Systems (EBS) is a combinatorial formulation of the group key management problem in wireless sensor networks. A simple method for optimizing key assignment based on EBS is presented, which significantly reduce the time overhead by avoiding the back tracing process. The proposed method requires O(n) time complexity to find an optimal key assignment while the earlier schemes of different...
Scalability and efficiency are important for designing application-layer multicast protocol. In this paper, a short delay degree-constrained hierarchical protocol-SDDM is proposed for application-layer multicast. It adopts the idea of layer and cluster to construct multicast group members into a hierarchical architecture. When constructing the hierarchical architecture, the end host heterogeneity...
Shunt hybrid active power filter (SHAPF) is one of the most powerful equipments in resolving harmonics of power quality problems and compensating system reactive power. In this paper, a new type of HAPF is expatiated including a fundamental series resonance circuit and an injective capacitance, thus decreases the capacity of active inverter. Based on instantaneous reactive power theory, ip - iq method...
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