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The selection of wavelet threshold and the determination of thresholding function would directly affect the quality of the signal denoising using wavelet thresholding method. In the conventional thresholding denoising approaches, some aspects require improvement, such as the fixed threshold and the inflexible thresholding rules. To address these problems, a Kent chaos artificial bee colony (KCABC)...
The technique of using cavity modes of tablet with full metal housing for the WLAN operation (2.4/5GHz) and the GPS operation (1.575GHz) is presented. The antenna was printed on a thin antenna carrier with size of 45 mm by 19 mm. 2.4 and 5 GHz resonances were created with an IFA (Inverted F Antenna) with assistance of cavity mode excitation at these frequencies. GPS resonance was purely created from...
Eddy current pulsed thermography (ECPT) is an emerging non-destructive testing and evaluation (NDT&E) technique for conductive material. However, surface emissivity variation of metallic object influences accurate temperature mapping in infrared thermography, which leads to false alarm of defect detection. This paper proposes a new emissivity correction method for ECPT based on spectral reflectance...
In the process of controlling a high speed train, the driver is aware of the train operation status and the command information from the wayside equipment by observing the onboard DMI (driver-machine interface), and inputs the relevant parameters and commands according to the requirements, so as to realize the safe operation of train under the supervision and protection of the train control system...
This paper presents AFDD, an automatic fault detection daemon for high availability computing. First we compare two mainstream fault detection mechanisms which are commonly used by multiple hot standby systems and figure out their advantages and disadvantages. Next we combined the existing two prevalent technologies together: (1) RASdaemon real-time fault detection tools, (2) automatic bug report...
Huge pages have been widely supported by architecture and operating system. Huge pages map large fixed virtual memory regions, on the orders of 2MB to 1GB on Intel x86-64 architecture. The page size is the key to striking the balance between trade-off pairs. For example, initially, the use of huge pages aims to mitigate address translation overhead for memory-intensive workloads with large memory...
Modular multilevel converter (MMC) is a promising circuit topology in the field of high-voltage direct current transmission (HVDC) systems. To enhance the reliability of the MMC in this field, the popular method is the addition of redundant submodules (SMs). However, the MMC will become unbalanced when some SMs fails and the performance will be deteriorated, especially when the number of the failed...
Web services are more frequently accessed from a broad range of mobile users. Service composition integrates existing services to fulfill more complex tasks facing more dynamic environment. Pattern based service composition has been proven as an appealing approach to accelerate the service composition. This paper proposes a novel pattern based dynamic service composition framework that integrates...
Cataract is one of the major causes of blindness and vision impairment. In previous research work which includes fundus image pre-processing, feature extraction and using labeled samples to build classifier to reach the goal that cataract classification and grading automatically. To learn a well performed hypothesis, a large amount of labeled examples are required. The labeled examples are fairly...
Several emerging mechanisms using voltage to control the magnetism have recently been proposed because of their possible applications in energy-efficient spintronic devices [1]. Among others, one promising way to reach this goal is to use voltage to control the exchange bias of the magnetoelectric (ME) antiferromagnet Cr2O3 (Fig. 1) [2]. In this work, we demonstrate the ME effect in the device level...
This work considers energy management in a grid-connected microgrid which consists of multiple conventional generators (CGs), renewable generators (RGs) and energy storage systems (ESSs). A two-stage optimization approach is presented to schedule the power generation, aimed at minimizing the long-term average operating cost subject to operational and service constraints. The first stage of optimization...
Several emerging spintronic devices have recently been proposed, performing computation by (a) generating spin currents based on input magnet states to switch an output magnet state using Spin-Transfer Torque (STT) [1,2], (b) using multiple nanopillars to drive a domain wall (DW) that switches an output nanopillar using STT [7], and (c) using magnetoelectric (ME) switching at the input, combined with...
In order to investigate evaluation methodology for hemiparetic gaits on rehabilitation purpose, volunteering subjects are recruited on the standardized walking trials. EMG signals are collected from six muscle groups on each lower limb. Improved autocorrelation analysis combined with gait analysis is then proposed. As the completion of gait cycle is described by percentage, gait quality is evaluated...
Wireless caching has been used to improve network performance and reduce bandwidth and energy consumption. In this paper, we study the issue of joint admission control and content caching for wireless access points with energy harvesting capability. Given limited energy supply, the access points, in a competitive environment, aim to maximize their payoff defined in terms of revenue by optimizing their...
Big data has been emerging as a new approach in utilizing large datasets to optimize complex system operations. Big data is fueled with Internet-of-Things (IoT) services that generate immense sensory data from numerous sensors and devices. While most current research focus of big data is on machine learning and resource management design, the economic modeling and analysis have been largely overlooked...
A novel drug-eluting stent with rhombic-shape drug reservoirs is proposed, aimed at providing smart drug delivery and longer fatigue life. By creating the rhombic-shape reservoirs, a stent could increase its total drug capacity and improves its stress distribution for fatigue life enhancement. Simulation results showed that the total drug capacity of our stent could be significantly increased without...
Biomedical image processing that offers computer-aided diagnosis is much more popular due to the availability of high quality and large quantity of medical data. Our well-developed biomedical image computing system, which automatically extracts and segments the nucleus and cytoplasm of cell in medical images, is no doubt following this idea. Nonetheless, even though previous system provide good algorithmic...
The current-voltage characteristics of dual source regions and U-shape-gate tunneling field-effect transistor (DUTFET) is investigated. The U-shape-gate offers the enlarged tunneling area and steeper subthreshold swing (SS). The remarkable good performance makes it very attractive in replacing a conventional tunneling field-effect transistor (TFET), particularly for low-power applications.
With the rapid development of wireless sensor networks (WSNs) based on Internet Protocol (IP) and its related technologies, there are increasing urgent needs of remote management on WSNs from Wide Area Networks (WANs). However, actual management applications lack standards and effective management protocols. Technical Report 069 (TR069) is a customer premise equipment management protocol for WANs...
In this paper, we experimentally validate the effects of different structures of metamaterial on efficiency enhancement in a four-coil magnetic resonant wireless power transfer system operating at 6.78MHz. First, we propose a concise design of magnetic metamaterials. A 6×6 planar array metamaterial slab is simulated to investigate its effect on power transmission between transmitter and receiver....
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