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Residual stress caused by Foreign object damage(FOD) plays an important role in predicting the rate of crack initiation and propagation, which will lead to the failure of aero-engine blades. At present, many studies focus on the measurements of residual stress on flat surface by ultrasonic testing methods, which are not fit for curved surface. To evaluate the local residual stress on curved aero-engine...
This paper focuses on D2D clustering communication method in the uplink and downlink aiming at saving energy of Mobile Terminals (MTs). The method contains MTs clustering method and cluster head selection methods. The MTs clustering method is based on the distance information of MTs. The cluster head selection method is based on the energy consumption or the residual energy of MTs. And Quality of...
With RFID applying in library, this paper develops an Internet of Things System for Library Materials Management using Android based UHF mobile reader (Android mobile reader) as its entry to increase the efficiency of library materials management. The functions of the Internet of Things System for Library Materials Management include user identification, inventorying, adding, refreshing, searching,...
Plane wave ultrasound imaging (PW) with coherent compounding can improve the image quality in terms of contrast, SNR, and lateral resolution compared to the conventional PW method. When the number of PW transmissions is small, the image quality still need improvement. In this paper, we proposed to first estimate the synthetic transmit aperture imaging (STA) data with regularized singular-value decomposition...
This paper presents an approach to steer the receiving field of view (FOV) of ultrasound imaging by linearly combining the RF signals from adjacent elements of a phased array without applying delay to the elements. The motivation is to reduce the number of measurement channels M (the product of number of transmissions, nT, and the number of receiving channels in each transmission, nR) while retaining...
Various spatial compounding techniques have been proposed to improve contrast to noise ratio (CNR) of targets in ultrasound imaging by incoherently averaging sub-aperture images. However, spatial compounding (SC) sacrificed lateral resolution due to the decreased width of the selected sub-aperture. This paper presents the application of combining the SC and modified coherence factor (CF) techniques...
EEG source imaging is able to reconstruct sources in the brain from scalp measurements with high temporal resolution. Due to the limited number of sensors, it is very challenging to locate the source accurately with high spatial resolution. Recently, several total variation (TV) based methods have been proposed to explore sparsity of the source spatial gradients, which is based on the assumption that...
Treebank is one of important resources in the natural language processing. Compared with the rich and mature Chinese corpus, Vietnamese Syntactic Analysis is much more difficult. This paper presents a new approach which uses Chinese-Vietnamese bilingual word alignment corpus to build Vietnamese Dependency Treebank. Firstly, the aligned word processing was made by Chinese-Vietnamese sentence alignment;...
Recent studies show that the phase-amplitude coupling (PAC) may play a functional role in information processing and cognition. The conventional method for PAC analysis is implemented by using Fourier-based filters, which assumes the signal is stationary and linear. However, as biological signals are nonstationary and nonlinear, this method introduces inaccuracy. To solve this problem, a new method...
Motivated by frequent failures in cloud computing systems, we analyze failure frequency and failure continuity of tasks from the Google cloud cluster, and find what we call killer tasks that suffer from frequent failures and repeated rescheduling. Killer tasks cause unnecessary resource wasting and significant increase of scheduling workloads, which can be a big concern in cloud systems. We aim to...
We present a a plasmonic route to superradiant and subradiant effects excited by a pair of two-level emitters embedded inside plasmonic nanochannels. These channels can provide an effective epsilon-near-zero (ENZ) response in their cut-off frequency and Fabry-Perot (FP) resonances in higher frequencies. The plasmonic resonant modes are found to enhance the constructive (superradiance) or destructive...
A push-push W-band voltage-controlled oscillator (VCO) with oscillating frequency that ranges from 112 GHz to 117 GHz in 90-nm CMOS technology is presented. By eliminating the varactor and shielding the inductor, phase noise and quality factor are greatly improved. The power consumption is 36 mW at 1.2 V. The resulting phase noise is −93 dBc/Hz at 1-MHz offset, and output power is from −12 dBm to...
In this paper, the root cause and solution of bump deformation failure of memory product in FC(Flip chip) process were studied through experimental and simulation method. After analysis, MUF (Mold under fill) unbalanced flow was proposed to be the real root cause for this type of failure. In order to verificate it, the simulation method was proposed to explain what level of stress did the bump suffer...
The modeling of transmission line excited by an external electromagnetic field plays an important role in performing engineering studies for electrical systems. However, the total induced current in the line has two components: an “antenna mode” current and a “transmission line mode” current. In this paper, we discuss the transmission-line model analytic solutions at each point of the two-wire transmission...
Nowadays, close monitoring of daily activities of elders is enabled by employment of the advanced wireless sensor networks, whose large quantity data are then analyzed by activity recognition techniques whereby their behavior patterns can be accurately modelled. In general, behavior patterns are important information about how elders live, and caregivers can thus take care of elders easily with the...
The path planning for tourism is a challenging problem, due to some personalized requirements, such as the travel time and budget, and other resource constraints, including the capacity of the spot, the congestion at the spot or on the link, etc. There has been a lot of research on personalized route recommendation algorithm. Most algorithms in the literature cannot get the optimal result when all...
The existed cloud data models can not well meet the management requirements of structured data including a great deal of relational data, therefore a two-layer cloud data model consisting of a presentation layer and a storage layer is proposed. In the presentation layer, the conception of composite class and composite object are defined to represent the structure and the data of structured data respectively...
In response to the open-door economic policy of China, companies in Taiwan have gradually relocated their production lines to China in order to decrease production costs and meet major market needs. Moreover, previous studies have examined whether businesses can continually earn excess profits by researching and developing new technology or products using their strong human resources. Therefore, the...
This demo showcases our recent work on assisting CPG (Consumer Packaged Goods) companies with their product packaging designs by providing color palettes that are visually appealing, novel and consistent with targeted brand messages. Specifically, we start by mining a large collections of images of different products and brands to learn about colors and color combinations that frequently appear among...
Atmospheric particulate matter estimated by using satellite data is gaining more attention due to their wide spatial coverage advantages. Here, instead of empirical statistical approach, we describe a physical-based approach that reduces the uncertainty of surface PM10 estimation from satellite data. In our approach, particulate matter mass concentration retrievals require the inclusion of optical...
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