The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Practically, we are often in the dilemma that the labeled data at hand are inadequate to train a reliable classifier, and more seriously, some of these labeled data may be mistakenly labeled due to the various human factors. Therefore, this paper proposes a novel semi-supervised learning paradigm that can handle both label insufficiency and label inaccuracy. To address label insufficiency, we use...
In this paper, we proposed a dorsal hand vein recognition method based on Convolutional Neural Network (CNN), compared the recognition rate of different depth CNN models and analyzed the influence of dataset size on dorsal hand vein recognition rate. Firstly, the region of interest (ROI) of dorsal hand vein images was extracted, and contrast limited adaptive histogram equalization (CLAHE) and Gaussian...
In this paper, a method is proposed for classification of patients with disorder of consciousness (DOC) based on the diffusion tensor imaging (DTI) sequences analysis. The patients are divided into vegetative state (VS) and minimally consciousness state (MCS). Firstly, tract-based spatial statistics (TBSS) was applied to find the regions of interest (ROIs), and the values of fractional anisotropy...
In order to improve the accuracy and stability of industrial fault detection and diagnosis, this paper introduces the deep learning theory and proposes an improved Deep Belief Networks (DBNs). In the first, this paper introduces the “centering trick” in the pre-training process of network. This method is done by subtracting offset values from visible and hidden variables. Then, in the process of network...
In photovoltaic (PV) grid-connected system based on series-connected power optimizer, the open-circuit fault of the inverter will seriously affect the security and reliability of system operation. To solve this problem, two kinds of open-circuit fault detection methods for the inverter based on series-connected power optimizer without communication are proposed. Firstly, the fault detection method...
In cascaded-type microgrid, the synchronization and power sharing of distributed generators (DGs) become two new issues that needs to be addressed urgently. In this paper, a unified droop control is proposed and its stability is analyzed in the islanded mode. The proposed scheme can ensure the system stability and accurate power sharing without communication in four-quadrant operations. Finally, simulation...
The performance of interior permanent magnet synchronous motor (IPMSM) drive system is affected by parameters variation and digital control delay, which increases the difficulty and complexity of analyzing and designing, a visualization technique is proposed in discrete time domain. First of all, D-partition method is used to obtain stable region of IPMSM current loop, while the sampling & computation...
Conceptual elevation of data in business process modeling was first formulated in 2003. The research community responded to this new idea enthusiastically. In the past decade, there have been numerous research activities concerning the interactions between business processes/activities and data in many aspects of business process management. Many of the advancements have or will have impacted on design/modeling,...
An 8×8 slot array with high-efficiency and corporate-fed single layer by ridge gap waveguide at 60-GHz is introduced in this paper. The manufactured antenna depicts more than 19.6% bandwidth with input reflection coefficient better than −10 dB and the aperture efficiency higher than 70% with around 26 dBi realized gain between 58 and 66 GHz.
In this paper, a novel compact integrated antenna-diplexer for Frequency-division duplex low latency wireless backhaul links at E-band is presented. The proposed solution is designed in a multilayer architecture with each layer having different functional blocks. The layers have been stacked on top of each other without any electrical contact requirement between them. This is achieved by using packaging...
Recently, very deep convolutional neural networks (CNNs) have been attracting considerable attention in image restoration. However, as the depth grows, the longterm dependency problem is rarely realized for these very deep models, which results in the prior states/layers having little influence on the subsequent ones. Motivated by the fact that human thoughts have persistency, we propose a very deep...
We present an ultra-wideband antenna for mm-wave applications. The antenna consists of a bowtie patch integrated with the feeding network. The feeding network is implemented as a multilayer substrate structure. The differential excitation of the bowtie is performed in a similar way to Magneto-Electric Dipoles and Marchand baluns. The simulated antenna shows a relative bandwidth of 2.6 : 1 with a reflection...
Inverted microstrip gap waveguide is mechanically flexible millimeter wave transmission line. This paper describes a single-layer slot antenna array unit cell at 60-GHz designed by using this inverted microstrip gap waveguide technology. This antenna unit mainly consists of a 2×2 slot layer and corporate-feed networks. The unit-cell shows more than 14.6% bandwidth over 57–66 GHz band with 10-dB return...
In order to reduce the Common-Mode Voltage (CMV) in three-to-five phase indirect matrix converters, three improved Space Vector Pulse Width Modulation (SVPWM) methods are proposed and discussed. The improved modulation schemes are achieved by reorganizing zero vectors from the inversion stage to the rectification stage. The proposed methods can not only theoretically reduce the CMV peak value by up...
The interleaved bidirectional DC-DC converter is a core component of the battery energy storage system. However, if an open-switch fault occurs at the interleaved bidirectional DC-DC converters, the currents of two branches will become unbalanced, which will increase the battery current ripple and shorten the life of batteries and energy storage systems. In this paper, a fault tolerant topology is...
By taking advantage of a wideband bow-tie antenna in the Yagi configuration, a novel multilayer-stacked ultra-wideband (UWB) Yagi antenna is proposed. First, the fundamental 3-layered UWB Yagi model is studied with respect to a few critical dimensions. Then, several directors are added to form a multilayer-stacked Yagi antenna, where the width of the directors is optimized in a monotonic decreasing...
Presented is a mathematical model to compute the multiple-input multiple-output efficiency of a multiport antenna in the single-user case. The evaluation comprises the performance of a zero-forcing receiver in two limiting propagation scenarios, i.e., the random line-of-sight and the rich isotropic multipath channels.
When designing a controller in DC Microgrid, normally the communication delay, which may cause system instability, has not been taken into account. In this paper, the effect of communication delay on system stability is studied based on a distributed control strategy. To obtain a less conservative condition for system stability, the delay-dependent stability is analyzed. In the case of time-invariant...
For human pose estimation in monocular images, joint occlusions and overlapping upon human bodies often result in deviated pose predictions. Under these circumstances, biologically implausible pose predictions may be produced. In contrast, human vision is able to predict poses by exploiting geometric constraints of joint inter-connectivity. To address the problem by incorporating priors about the...
This paper presents a novel double-wing one-step 45° Gap waveguide twist at E-band. By employing an optimal double-wing structure for Gap waveguide flange, only one gap waveguide section is needed for the polarization transform between diagonal polarization and horizontal/vertical polarization, which does not require good conductive contacts between the connected flanges. This new waveguide twist...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.