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In order to improve the accuracy of rail crack detection, especially for the high-speed condition, this paper proposes a rail crack detection method based on the adaptive noise cancellation method of empirical mode decomposition (EMD). The acoustic emission (AE) signals of simulated crack signals are obtained by the rail-wheel test rig, and these signals are decomposed into intrinsic mode functions...
This paper studies the decentralized output-feedback control of a two-player system with communication delay. A new controller structure is considered. Under this controller structure, the subsystem only needs to estimate its own subsystem state. The estimated system state is computed by Kalman filter. The gains of the controller are constructed by an algorithm. The algorithm is proposed based on...
Data-driven health condition monitoring has received increasing attentions. However, the bandwidth of transmission channels imposes the limit on the amount of sensor data to be used in remote condition monitoring systems in real-time applications. In this paper, a remote health condition monitoring (RHCM) method based on compressed sensing (CS) is proposed for machine state classification and signal...
The (s+t+1)-dimensional exchanged crossed cube (ECQ(s, t) for short), combines the advantage of the exchanged hypercube and the crossed cube. The Hamiltonicity connectivity is an important property in interconnection networks. In this paper, firstly, we prove that there exists not only a Hamiltonian path but also less than 1 than Hamiltonian path between any two distinct vertices in ECQ(s, t), where...
We report the efficient coupling of optical whispering gallery modes (WGMs) in liquid crystal microdroplets suspended in immiscible aqueous environment. Individual nematic liquid crystal (NLC) microdroplet is confined at the tip of a microcapillary used to generate the microdroplets and coupled through a tapered optical fiber waveguide positioned in the vicinity of the microdroplets. Efficient coupling...
High performance CH3NH3PbI3 perovskite photodetectors are realized by applying thin films of fullerene derivatives as interfacial layers between the metal contact and the perovskite materials. The perovskite photodetector with PC61BM interlayer demonstrates much better performance than that with IC60BA interlayer, reaching a responsivity of 57.6 mA/W. The influences of different fullerene derivatives...
A IGZO transistor is capped with needle-like organolead trihalide perovskite (MAPbI3) layer for photo detection application. The MAPbI3 capped IGZO phototransistor demonstrates excellent responsivities and sensitivities to light in both UV and visible region. Furthermore, fast transient response has been achieved without persistent photocurrent (PPC) behavior.
This paper presents a 150GHz fully differential amplifier with gain boosting and optimized Marchand balun matching networks in a 65nm CMOS technology. The optimized Marchand balun overcomes the self- resonance problem that the conventional balun suffers, and reduces the size as well. The over- neutralization technique is proposed and utilized in order to boost the gain of a differential pair without...
Spatial data mining mainly includes the process of extracting implicit knowledge, spatial relationships and the meaningful features or patterns from spatial database. The operation and management of power system consist of a large amount of spatial information, and the spatial data mining provides a powerful tool to process the massive spatial data. This paper discusses the spatial data mining technology,...
In this paper, we systematically investigate the poly etch performance with three different kinds of spin-on materials (BL organic coating material, and two other spin-on materials A and B) in P2 cut process from the point view of defect and process control. Our results show that with one kind of new spin-on material B, the bubble defect performance can be significantly improved. With different gas...
This paper presents a novel real-valued multiple signal classification (RV-MUSIC) algorithm, which tremendously reduces the computation complexity than the complex one by a factor of four. The covariance matrix of the sensor output is firstly transformed into a real-valued covariance matrix via unitary forward/backward (FB) technique. Then the MUSIC algorithm in real domain is used to estimate the...
This paper adapts 3-D quantum transmission model to evaluate the performances of the junctionless (JL) FinFET devices for silicon-on-insulator (SOI) and bulk FinFET structures using high-k/materials as gate oxide dielectrics materials. Silicon dioxides (SiO2), silicon nitride (Si3N4), hafnium dioxide (HfO2) are used as the dielectric materials of the simulated JL FinFETs. Various device characteristics,...
The importance of regression testing in assuring the integrity of a program after changes is well recognized. One major obstacle in practicing regression testing is in maintaining tests that become obsolete due to evolved program behavior or specification. For mobile apps, the problem of maintaining obsolete GUI test scripts for regression testing is even more pressing. Mobile apps rely heavily on...
The responsiveness of the GUI in an Android application is an important component of the user experience. Android guidelines recommend that potentially-expensive operations should not be performed in the GUI thread, but rather in separate threads. The responsiveness of existing code can be improved by introducing such asynchronous processing, either manually or automatically. One simple view is that...
The corpus-based method has been proven to be useful in the translation field, but the size of most of the corpora is relatively small, so the variety and validity remain a problem. However, the Web consists of various types and unlimited amount of knowledge, so it meaningful to combine Web with corpora. This paper intends to show how to develop Web-based corpora and how to use it to help translation...
Mobile Assisted Language Learning (MALL) delivers the content of learning to the audience with the mobile computing devices such as laptops, smart phones and handheld devices. The advantage of MALL approach is that learners are not restricted to time, place and the presence of the teachers. This paper will discuss ways in which mobile computing devices can be used for aviation English learning with...
Research Purpose: Design a mobile intelligent medical information system based on the Internet of things technology. Proposed Methods: First, sort out the basic theory and research status through the literature research, including the Internet of things technology, mobile medical systems and smart hospitals. Then conduct on-site research through field visits, questionnaires, opinion evaluation and...
In order to investigate the basic situation of the TCM hospital information organization and management, capital investment, information system construction and application, and informatization performance development, to analyze the main problems, we carry out sampling and the corresponding survey according to the principle of provinces, cities and countries. And then, the basic situation of 1283...
In order to make the massive medical image resources from different devices and corresponding to different human tissues and organs and many kinds of diseases in the Picture Archiving and Communication System accurately and quickly retrieved and located in auxiliary clinical diagnosis, remote medical treatment and other applications, this paper designs a multi-pattern retrieval scheme of medical images...
In this paper, a win-win cooperative strategy is designed for two pairs of users, i.e., a primary user pair and a secondary user pair, competing resources in an orthogonal frequency division multiplexing (OFDM) network. The primary users aim to achieve given target rates with the help of a relay to overcome bad channel conditions, where one secondary user is selected as the relay to improve the overall...
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