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With the emergence of deep-learning algorithms, the accuracy of computer-aided supporting systems advanced., However, their adoption in the field of medicine has been limited, partially due to the challenges of generating reliable and timely results. In this research, we focused on classifying four common cutaneous diseases based on dermoscopic images using deep learning algorithms.
This study presents high-efficiency of 23.52% single-junction GaAs solar cell using ITO-film as antireflection and passivation layer deposited by thermally-RF-sputtering. The impressive enhanced in efficiency of 8.94% was obtained, compared to the cell with SiO2-film.
Direct power control (DPC) is an attractive control method for three-phase pulse-width modulation (PWM) rectifiers, due to the merits of simple structure, quick dynamic response and little tuning work. However, conventional switching table based DPC presents relatively high power ripples and current harmonics, which is especially serious when the grid voltages are unbalanced. Introducing space vector...
The control of PWM rectifiers under unbalanced network has become an important issue in recent years, especially in the applications with weak grid. Conventional methods is based on voltage oriented control (VOC), which requires several PI controllers in dual reference frame and the sequence extraction of grid/rectifier voltages and currents. To reduce the control complexity, recently direct power...
Deadbeat control (DBC) has been known for decades due to its conceptual simplicity and good performance. Recently finite control set model predictive control (FCS-MPC) is emerging as a powerful strategy for control of power converters. Different from DBC, which uses a modulator such as space vector modulation (SVM), FCS-MPC directly obtained the optimal switching states of power converters by minimizing...
Based on the single wheel vehicle model, a sliding mode variable structure control strategy with fractional exponential reaching law is proposed for the ABS control system. In this paper, the integral sliding mode surface is used to design the switching function, and the fractional exponential reaching law is designed by using the definition and properties of fractional exponential differential equations...
We demonstrate a new approach to generate microwave arbitrary waveforms by phase modulation and optical carrier processing based on gain-transparent SBS. Triangular waveforms at repetition rates of 5.64 and 7.87 GHz, and rectangular waveforms at repetition rates of 5.04 and 7.01 GHz are generated.
Reflection, which is widely used in practice and abused by many security exploits, poses a significant obstacle to program analysis. Reflective calls can be analyzed statically or dynamically. Static analysis is more sound but also more imprecise (by introducing many false reflective targets and thus affecting its scalability). Dynamic analysis can be precise but often miss many true reflective targets...
In this paper, we designed a real-time data recording system for the characteristics of the three-axis acceleration sensor MSA3000-100. The system consists of low-pass filtering, data acquisition, storage and data analysis. The system master adopts the STM32 chip. Firstly, the analog voltage information outputted by the sensor is pre-processed by the active first-order low-pass filter composed of...
In this letter, a three-dimensional (3D) image reconstruction approach is proposed for terahertz (THz) holographic by a sharply reduced amount of antennas and frequency samples, without reducing the quality of the image reconstruction results. With the obtained 3D sparse random sampling data, a sparse recovery procedure combined by two-dimensional fast Gaussian gridding based non-uniform Fourier transform...
Active Terahertz-wave imaging systems play a significant role in security and surveillance applications. This paper describes a 0.14THz near-field imaging system, which consists of a signal generator and acquisition unit, a transceiver front end, a digital signal process unit and a motor control unit. Base on the two-dimensional synthetic aperture technique and the image reconstruction algorithm,...
Increasingly sophisticated code obfuscation techniques are quickly adopted by malware developers to escape from malware detection and to thwart the reverse engineering effort of security analysts. State-of-the-art de-obfuscation approaches rely on dynamic analysis, but face the challenge of low code coverage as not all software execution paths and behavior will be exposed at specific profiling runs...
Model predictive current control (MPCC) is a powerful control strategy for the control of three-phase power converters. Conventional MPCC achieves good steady state performance and quick dynamic response by selecting the optimal voltage vector. However, this method is highly dependent on the accuracy of the model and parameters, which means that the steady state performance will deteriorate when the...
As the typical load with thermal energy storage property, thermostatically controlled loads possess the potential to actively participate in load shedding control for power system. This paper takes air conditioning load as an example, proposing a recovery strategy for emergency control of thermostatically controlled load groups. Moreover, the emergency control strategy's probability model was established...
Air conditioners can actively participate in frequency control for power system when it suffers from large power shortage. To make full use of reserve resources, a decentralized control strategy for air conditioning loads was proposed. Meanwhile, in order to facilitate analysis and control, the control strategy's probability model was established. Firstly, a modulation strategy responding to frequency...
Through implementing the equal-strength analysis based on unified strength theory, strength calculation formulas of two-and three-layer prestressed combined dies for cold extrusion were derived in this investigation. Two parameters were included in the suggested strength expression, parameter α presenting/considering the difference between material tensile and compressive properties, and...
Battery thermal management (BTM) system is indispensable for compact lithium-ion (Li-ion) energy storage system used in aerospace and automotive applications. Besides maintaining the battery temperature within an optimum range, thus extending their lifespan and improving their electrochemical and electrical performance, the BTM system also needs to be well designed with considering the rigorous constraints...
In this paper we develop a fault detection and isolation method based on data-driven approach. Data-driven methods are effective for feature extraction and feature analysis using statistical techniques. In the proposal, the Principal Component Analysis (PCA) method is used to extract the features and to reduce the data dimension. Then, the Kullback-Leibler Divergence (KLD) is used to detect the fault...
For patients with hemiplegia or stroke and other limb locomotion dysfunction due to problems such as neurological, an important therapy is Rehabilitation training. Repetitively task-directed exercise can increase the motion performance of patients with nerve problems. In this paper, an adaptive controller for the lower limb rehabilitation robot (LERR) is proposed to take control of the robot's gait...
Decades went by since Mark Weiser published his influential work on how a computer of the 21st century would look like. Over the years, some of the UbiComp features presented in that paper have been gradually adopted by industry players in the technology market. While this technological evolution resulted in many benefits to our society, it has also posed, along the way, countless challenges that...
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