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To achieve intelligent manufacturing in Industry 4.0 for steel industry, this paper considers a smart steel manufacturing framework, where an automatic identification tracking method for steel products is proposed. Automatically online tracking and identifying steel products on a production line is essential for intelligent manufacturing management since those products would be frequently moved and...
Aiming at the impact damage of transmission steel structure tower coating in Xinjiang, the dynamic impact mechanics behavior of transmission steel structure tower coating under simulated single particle impact was studied by automatic sphere impact tester and digital image correlation experiment measuring system. The three-dimensional morphological features of impact damage were analyzed by laser...
ESN load forecasting model has high stability, and is able to learn fast and not easy to fall into local optimum, compared with standard recurrent neural network. In the process of constructing the typical ESN model, the choice of parameters is always empirical or random. The forecasting performance of ESN was analyzed on the basis of its key parameters. While the dynamic reserve pool has black box...
Time-of-use price is the main measure of demand side response in China, which can alleviate several issues, including large difference between peak load and low utilization of equipment etc. In order to enhance user's response of achieving the optimal staggering power consumption effect, this paper aims to solve the urgent problem of how to establish reasonable Time-of-use price scheme. In this paper,...
Based on the reflection and refraction of traveling waves and vacuum circuit breaker(VCB) characteristics, transformers interruption by VCB may produce current chopping and re-ignition that will cause severe high-frequency transient overvoltages in collection grid of offshore wind farms(OWFs). In such applications, overvoltages protection should be used. In order to study such overvoltage in OWFs,...
Uncontrolled energization of unloaded transformers is usually associated with a large inrush current, several times larger than the rated transformer current. This transient can cause unfavourable consequences including reduction of transformer lifecycle, protective relay misoperations, and reduced power quality of the system. Controlled switching can efficiently eliminate these transients when energizing...
The amount of switching operations of unloaded transformers increases with the developments of smart grids and integration of renewable energy sources. A random energization of an unload transformer can cause high amplitude and high frequency inrush currents. Controlled switching can eliminate the inrush currents effectively, the key to realize which is measuring residual flux in transformer core...
In this paper, the dynamic characteristics of two types of electromagnetic repulsive force actuators are compared using the simulation of finite element method. The two electromagnetic repulsive force actuators are equipped with a single-sided coil and a double-sided coil respectively. Initially, the construction and theory of each of the electromagnetic repulsive force actuators are discussed. Subsequently,...
Hybrid HVDC circuit breakers have become a key component for HVDC grids, which offer the combination of low losses of mechanical switches and fast switching actions of power electronic switches. The parameters of the circuit breakers have a greater impact on its interruption performance and size. In this paper, the transient characteristics of the hybrid HVDC circuit breakers with forced commutation...
The solid-state transfer switch is composed of thyristor valves and vacuum switches in parallel, and thyristor valve series grading is one of important technologies to ensure the normal operation of solid-state transfer switch. Based on the study of static blocking and dynamic switching characteristics of series-connected thyristor and the mathematic model for thyristors, the main causes of voltage...
The Radio Interferometric Positioning System (RIPS) is a phase-based localization scheme that achieves high accuracy with low-cost devices. Indoor localization with RIPS is, however, a challenge due to dense multipath. In this paper, we propose holographic radio interferometry (HRI) to cope with multipath effect. HRI builds hologram out of phase measurements in radio interferometry for the mobile...
The aim of this conference paper is to introduce a novel and effective diagnosis method for defective array elements by hybrid Compressive Sensing (CS) and Iterative Shrinkage Thresholding Algorithm (ISTA). The proposed method utilizes the framework of Compressive Sensing and the sparse signal is constructed via difference incentives of reference array without failures and array under test with failure...
According to the insufficient research on the complex electromagnetic environment adaptability for the electronic equipment, two kinds of prediction model for dual-frequency in-band electromagnetic radiation effects is established. The decision method of choosing prediction model for electronic equipment is put forward. The ultra-short wave communication stations are selected as equipment under test...
A FinFET SCR embedded ESD clamp for power supply protection with low leakage current is demonstrated. The proposed clamp is suitable for low power applications since it reduces ∼87% of leakage current per bigFET width and improves ESD robustness to ∼2X per footprint compared to the conventional RC-triggered clamp.
To improve the flexibility and stability of microgrid operation, this paper takes the multi-port power electronic transformer (PET) as the connecting interface of microgrid, and the energy storage system (ESS) at the low voltage DC (LVDC) side is controlled to reduce the influence of load or distributed generation (DG) fluctuations on microgrid. The mathematical models of interface stages are also...
For CNC machine tools in industrial applications for manufacturing high-precision mechanical parts, control parameters are usually tuned manually by master workers with a trial-and-error technique. However, this trial-and-error technique wastes manpower and time, and the tuned parameters would never approach perfect values, but provides only acceptable results. To address this problem, a parameter-tuning...
Ship course control is representative marine application which has attracted considerable attentions from control community. In this paper, the ship course control algorithm is proposed based on differential flatness and sliding mode technique. The states and control input are firstly represented by the flat output and its derivatives. In order to enhance the robustness against external disturbances...
In recent years, the theory of compressed sensing has attracted great attention in radar field. As a typical iterative greedy algorithm, the Orthogonal Matching Pursuit (OMP) algorithm has applied to 3-D synthetic aperture radar (3-D SAR) imaging. But for large scene imaging, the OMP algorithm requires a huge computational time and space storage. The Gradient Pursuit (GP) algorithm has more advantages...
In a recent study, we have shown that the mixtures of graphene oxide (GO) nanosheets and Pluronic F-127 (PLU) polymers (GO-PLU) exhibit superior antimicrobial activity compared to GO alone on physiologically naïve bacteria challenged with hypoosmotic stress, particularly on Gram-negative species. Further, we have more recently demonstrated that the antibacterial activity of GO (alone) is significantly...
In order to solve the problem of the lack of prior knowledge in intrusion detection, as an unsupervised learning algorithm, the clustering algorithm is applied to intrusion detection. Aiming at the shortcomings of intrusion detection algorithm based on traditional hierarchical clustering, such as high time complexity and high false positive rate, a new clustering algorithm for intrusion detection...
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