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Magnetic shape memory alloy (MSMA) has recently emerged as a new type of multifunctional material exhibiting excellent performance as fast response and large strain. Constitution equations are derived based on the magnet-strain effect of MSMA. Experiments are conducted to explore the magnetic field induced strain, and data are applied to establish neural network based models to build the nonlinear...
In order to solve the problem of energy supply for wearable and portable electronic equipment and exoskeleton, a direct energy recovery mechanism based on hydraulic transmission principle was designed. Firstly, according to the particularity of human body structure and function, establish a theoretical model can reflect the state of human body by Lagrange modeling method. Based on the established...
Cardiovascular disease (CVD) caused by atherosclerosis is one of the major causes of death world-wide. Currently, diverse machine learning models have been applied to disease prediction and classification. However, most of them tend to focus on the performance of the algorithm and neglect the underlying variables for patients in different carotid atherosclerotic stages. In this paper, we propose a...
This paper proposes a novel reluctance axis shifted (RAS) machine with hybrid rotors, i.e., permanent magnet (PM) and synchronous reluctance parts, respectively. The proposed design is geometrically characterized by two axially parallel rotors, which enables the full utilization of reluctance and magnet torque components for torque improvement. In the proposed design, the reluctance axis coincides...
This paper proposes a novel flux-reversal hybrid magnet memory machine (FR-HMMM), which is geometrically characterized by consequent-pole hybrid magnets mounted on the stator poles. The low-coercive-force (LCF) permanent magnets (PMs) are alternately placed between the adjacent stator slots, while the rare-earth NdFeB PMs are located on the center of stator pole. Due to the consequent pole configuration,...
In order to study wind power medium-term forecast method, a combined forecasting method is proposed in this paper, taking gray theory and neural network to combine to forecast wind power of wind farm. Through establishing metabolism gray forecast model, using the linear weighted method to take gray information metabolism model and chaotic neural network model for portfolio optimization, and simulated...
Due to great advantages in anti-stealth and wide bandwidth, the Terahertz Inverse synthetic aperture radar (THz-ISAR) imaging technique has attracted much attention in recent years. However, high resolution will intensify the dispersion effect especially for high-speed moving targets. This paper presents a new method of high speed motion compensation for THz-ISAR imaging. The proposed entropy-based...
A novel axial flux permanent magnet eddy-current coupling (PMECC) employing a new magnetic field adjustment (MFA) method is proposed in this paper. The structural feature and operation principle of the novel PMECC are illustrated. The magnetic equivalent circuit (MEC) model is built in this paper to analyze its electromagnetic characteristics efficiently. For improving the torque capability, the structure...
Ia this paper, a Halbach arc linear permanent magnet machine (ALPMM) for large telescope application is analyzed by finite element method. The ALPMM consists of one rotor and three segmental stators in which the stator core and windings are characterized by “C” shape. A 3-D air-gap, which can significantly increase the torque density, is formed between the C-shape stator and the rotor. The key electromagnetic...
High resolution synthetic aperture imaging using rotating fan-beam scatterometers is studied. First, the working mode is presented. Then, the relationships among pulse repetition frequency, the number of coherent pulses and the unambiguous swath are discussed. Considering the sparsity of the imaging region and the limited number of pulses, we adopt the sparse recovery method to obtain the target images...
Hydraulic system of vehicle shift is an important part of the vehicle automatic shift control system. It affects the quality of the shift. In order to research the characteristics of the hydraulic system of vehicle shift, a model was established based on AMESim. The correctness of the simulation model is verified by building a single hydraulic circuit test platform. Simulation and experiment show...
This paper presents an approach to enhance the performance of machine learning applications based on hardware acceleration. This approach is based on parameterised architectures designed for Convolutional Neural Network (CNN) and Support Vector Machine (SVM), and the associated design flow common to both. This approach is illustrated by two case studies including object detection and satellite data...
Different from memory management mechanisms in legacy systems, those in mobile devices leverage the use of app caching to accelerate app launch performance. The responsiveness of switching back to a recently used app becomes significantly worse if the cached app process has been killed in the past due to a low memory constraint. We propose a new approach to optimize the low memory killer with reinforcement...
Pedestrian navigation has become one of the most used services in people's city lives. Not only smartphone based navigation, but also the application in the next generation of intelligent wearable devices, such as smart glasses, attract attentions from both scientists and engineers. The satisfied navigation service requires an accurate positioning technology. Even though the current smartphones have...
This paper proposed an integrated hall magnetic encoder error correction method. In order to eliminate the steady-state error caused by installation errors and so on, this paper proposed three-phase zero and sine symmetric reconstruction. The sum of three-phase hall signal could be constant zero through zero reconstruction. In sine symmetric reconstruction method, transform three-phase hall signal...
This study aimed to employ the recently developed fuzzy measure entropy (FuzzyMEn) method to compare the difference in heart rate variability (HRV) between rest and exercise states in hypoxic environment. Four healthy male volunteers were enrolled in this study. For each subject, electrocardiography (ECG) and finger pulse were recorded in ten days to obtain the heart rate (HR) time series. For each...
Human computer interaction is becoming more integrated in daily life with the proliferation of mobile devices and virtual reality technology. Hand gesture recognition is a potentially promising mechanism to facilitate human computer interaction, however wrist-mounted surface electromyography (sEMG) hand gesture classification is particularly challenging given the relatively small sEMG signals as compared...
SARSA, as one kind of on-policy reinforcement learning methods, is integrated with deep learning to solve the video games control problems in this paper. We use deep convolutional neural network to estimate the state-action value, and SARSA learning to update it. Besides, experience replay is introduced to make the training process suitable to scalable machine learning problems. In this way, a new...
Given a set P of n points in the plane such that each point has a positive weight, we study the problem of finding an obnoxious line that intersects the convex hull of P and maximizes the minimum weighted Euclidean distance to all points of P. We also consider a variant of this problem whose input is a set of m polygons with totally n vertices in the plane such that each polygon has a positive weight...
In this paper, we study the violation versions of the planar points approximation problems, which deal with outliers in the input points. We present efficient algorithms for both the step function and the more general piecewise linear function cases, and for both non-weighted and weighted points. Most of our results are first-known. Our algorithms are based on interesting and nontrivial geometric...
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