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With the developing of modern training, advanced requirements of training process such as creative, economical, realistic, safety have been proposed. It is hard for tradition training method to satisfy the training requirement of new technology and equipment in the background of modern industry. Traditional training methods were facing severe challenges. In order to solve the complex technical training...
This paper presents an electrical parameter estimation method of the main-circuit insulation test for 1100kV gas insulated switchgear (GIS) equipment in order to realize the rationality of the test segmentation, equipment selection and parameter matching. First, the test method of main-circuit insulation is given. Then, the methods of estimating test capability of the variable-frequency series-resonant...
In this paper, a multi — factor prediction model based on Radical Basis Function(RBF) neural network is proposed to accurately predict the temperature of rolling bearing. According to the factors that affect the rolling bearing, including load, speed, vibration, displacement, bearing temperature and ambient temperature, the working temperature of the rolling bearing is predicted by combining the historical...
Combining the current development of high-gain antenna technology, the inter-satellite terahertz communication system's demand for acquisition pointing and tracking (Acquisition Pointing Tracking, APT) technology are analyzed based on the inter-satellite terahertz communication application. The tracking-pointing error has a major influence on the received power of the communication system by simulating...
This paper presents a new solution for SAR image target recognition by designing a light level convolutional neural network (CNN), and raises an unsupervised detection method by taking the advantages of convolutional features. Firstly, we train a shallow convolutional network by using Moving and Stationary Target Recognition (MSTAR) dataset to classify SAR targets. Then, we extract the outputs of...
Due to the great performance in complex and narrow spaces, snake-like robots, especially snake arm robots, have gained increasing attention in recent years. In this paper, a novel cable-driven snake arm robot is proposed. For greater flexibility, the snake arm not only has multiple two-degree-of-freedom joints, but also has telescopic modules that have one degree of freedom. The kinematics and statics...
Compliance control using tactile sensor for robotic hands have been one of the major research topics. Most researchers use a variety of multi-dimensional force sensors with compliance control. In this paper, we replace traditional multidimensional force/torque sensor with one-dimensional pressure sensor. In order to achieve the effect of multi-dimensional sensor, we also propose a vector decomposer...
This article investigates a mobile control problem for a class of stochastic distributed parameter systems with moving boundaries by using mobile sensor-actuator networks(MSANs). The network induced randomly missing measurements among the sensors are introduced for their universal existence in sensor networks. The collocated sensor-actuator networks which can travel throughout the spatial domain are...
Aiming at the problem of sensor node deployment in underwater wireless sensor networks(UWSNs), the doublecoverage algorithm is proposed to solve the premature failure caused by excessive energy consumption. First of all, the coverage area of node is divided into grid around the mobile sensor network with AUV. Then the sensor node is analyzed to design the sensor node sensing model and the sensor node...
Particle impoverishment, which always leads to accuracy decreasing, is a classical problem of the traditional particle filter resampling. A particle filter resampling method based on improved genetic algorithm is proposed in this paper to solve the problem. In the improved algorithm, a genetic resampling step is applied for particle reproduction. The main work of the improved algorithm include two...
This Polyimide film has excellent electrical properties and it serves as an important insulating material which is widely used in the variable-frequency motor and wind generator. Since high temperature is a significant reason for degradation in insulation, the space charge distributions of polyimide (PI) films in high temperature condition is worth investigating. Under different temperature, the conductivity...
Magnetic nanoparticle (MNP) thermometry will be necessary for safe therapeutic implementation of magnetic nanoparticle hyperthermia, a developing cancer treatment. One realization of a MNP thermometer works by detecting harmonic signal (the fundamental f and 3f harmonics) generated by MNPs exposed to ac magnetic field. In this paper, we aim to measure accurately the harmonic signal in a MNP thermometer,...
This article aims to the problems that the particle swarm optimization (PSO) algorithm has slow convergence and easy to fall into local optimum, provides an improved adaptive particle swarm optimization algorithm based on Levy flight mechanism (LFAPSO). The long jumps of Levy flight will step out of the local optimum in the local search. The convergence speed and accuracy of the LFAPSO algorithm are...
Ultrasonic thermometry is a kind of emerging acoustic pyrometry technology, and it can break through the limitation of various electromagnetic environment, where the traditional temperature measurement methods have failed to operate satisfactorily. The temperature on the current path can be retrieved by the speed of the ultrasonic wave. When the measurement path is fixed, the key issue of ultrasonic...
This paper considers the antagonistic formation problem of second-order multi-agent systems with addictive noises and multiplicative noises over directed signed graph. Firstly, a distributed protocol is proposed, and a time-varying consensus gain is introduced to attenuate the effect of communication noises. Then, by using the tools of matrix theory and stochastic differential equation, the necessary...
With rich reserves and unique advantages, offshore wind resources has become an important development direction for the future wind power generation. However, since the characteristics of offshore wind power are different from that of onshore wind power, many key issues need further study, especially the probability of offshore wind turbine suffering from lightning strike is large, resulting in a...
By analyzing AAA service log data of one main ISP in China, we found that the variations of authentication success ratio (ASR) exhibit counter-intuitive behavior. The ASR is actually higher during peak hours than off-peak hours. To account for this paradox and explain ASR variations in general, an analysis mechanism is proposed. It has the ability to separate ASR variations into systemic changes over...
This paper studies the transmission synchronization (TS) problem among multiple coupled chaotic systems by considering unknown parameters. In the solving process, we firstly select a special integral sliding surfaces, and then we develop an effective controller with the compensation terms to guarantee the asymptotical stability of all TS error systems. Simultaneously, we design the proper adaptive...
The traditional transformer respirator lacks the detection means, cannot realize the long-distance monitoring, and must carry on the regular inspection through the running staff to determine its state. This paper introduces a method of automatic detection of transformer respirator based on image processing with the aid of the intelligent inspection robot on-site shooting, returning the transformer...
When we use binary tree support vector machine (SVM) to work the multi-classification problems out, we always find that the structure of the binary tree has a large chance and it has a great influence on the classification efficiency of the classification model. To solve this problem, according to the idea of separating the most widely distributed class first, an improved binary tree SVM multiple...
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