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For the next generation mobile video broadcasting, especially in-band solutions that serves the mobile devices, a limited feedback scheme via cellular channel polling is feasible to give accurate real-time information on the broadcast receivers' channel erasure rate, and decoding buffer status. In this work, we propose an AL-FEC coding degree scheme based on this feedback, to achieve a better decode...
In this work, we studied the problem of fall detection using signals from tri-axial wearable sensors. In particular, we focused on the comparison of methods to combine signals from multiple tri-axial accelerometers which were attached to different body parts in order to recognize human activities. To improve the detection rate while maintaining a low false alarm rate, previous studies developed detection...
In this work, we studied the problem of fall detection using signals from tri-axial wearable sensors. In particular, we focused on the comparison of methods to combine signals from multiple tri-axial accelerometers which were attached to different body parts in order to recognize human activities. To improve the detection rate while maintaining a low false alarm rate, previous studies developed detection...
Hydrogel-based robotic microdevices are currently investigated for minimally invasive medical procedures. Hydrogels are especially suited to targeted drug delivery applications as they are able to carry several times more drug solution than its dry weight. A major drawback of these system is that drug release takes place before reaching the targeted area in the body. We introduce a strategy based...
The 3D finite element analysis model of Package-on-Package solder joints was set up based on Patran software. The natural frequency, vibration mode of the model was analyzed under the condition of random vibration, the stress and strain distribution and the strain power spectrum density of response curves of the Package-on-Package solder joints were obtained, and the random vibration fatigue life...
This paper presents a fast simulation method of PMSG, which adopts positive and negative sequence current separate control strategy during an asymmetric grid fault. Based on analysis of fault characteristics, the asymmetric control strategy is developed in PSCAD, aiming to alleviate the adverse effects on converter and grid during an asymmetric grid fault. Separate positive and negative sequence current...
The purpose of the study is to ascertain the key feature subsets of hepatitis b virus (HBV) reactivation and establish classification prognosis models of HBV reactivation for primary liver carcinoma (PLC) patients after precise radiotherapy (RT). Genetic Algorithm (GA) is proposed to extract the key feature subsets of HBV reactivation from the initial feature sets of primary liver carcinoma. Bayes...
It is a common demand to solve regional limited problem in Internet of Vehicles (IoV) system with restricted time and storage requirements. In this paper, we present a fast point-in-area algorithm to tackle this problem. In the preprocessing phase, non-uniform grids are constructed by length thresholds and each row of the grids is viewed as a scan-line. The scan-lines scan area from top to bottom...
A low-noise low-power direct conversion receiver with a differential RF VGA is demonstrated using 0.18um CMOS technology. A topology that uses a differential inductor load for a differential RF VGA is employed for the single-to-differential conversion. Since the common-mode rejection ratio of a differential variable gain amplifier is increased by the mutual magnetic coupling in a differential inductor...
In this paper, a low-power transformer-based Ku-band receiver front-end is implemented in a 180-nm CMOS technology. The transformer-feedback gain-boosting technique and forward-body-bias technique are employed in three-stage (common gate + 2-stage common source) LNA to achieve a low-power design. A resistive ring mixer is chosen due to its advantage of zero-dc-power. The receiver demonstrates a 4...
This paper provides a detailed Message Passing Interface (MPI) communication characterization across representative HPC applications. It further evaluates performance and power efficiency improvement opportunities. Specifically, it shows that the traditional approach of active polling while waiting for MPI messages is extremely power inefficient, especially under a constrained cluster-level power...
In this paper, a CMOS particulate matter 2.5 (PM2.5) concentration to frequency converter with calibration circuits for air quality monitoring applications is newly proposed. A calibration technique is proposed in this work. Another innovation is that the outputs of the proposed chip are directly digitized, they could be easily sent over a wide range of transmission media, such as PSN, radio, optical,...
In this paper, we propose a novel architecture of polynomial neural network classifier (PNNC) with the aid of data preprocessing technique and space search optimization, which adopts accelerated convergence mechanism instead of purely random search. Two type of polynomials are adopted for constructing discriminate functions in the PNNC to alleviate the limitation of relatively simple geometry using...
A "keywords cloud" learning interest/difficult reminding system based on learners' video watching logs and subtitles is proposed for promoting self-paced MOOC learning. By identifying the hot video segments (via video seek event counts) and weighting the keywords of hot video segments, we are able to establish the "keywords cloud" of each learning topic. This feature is valuable...
We propose a camera based indoor visible light positioning (VLP) system with high accuracy. The LED transmitters send unique location codes, and the camera based receiver utilizes the image processing techniques to identify the codes. In order to control the flicker due to the limited frame rate of a commercial camera, we use an optical neutral density filter (ONDF) to attenuate the light and ensure...
The input command shaping technique is integrated with computerized numerical control (CNC) interpolators to suppress structural vibration of machine tools. The algorithm is called integrating input-shaping interpolator (ISI) which applies the input shaping on the acceleration/deceleration stage before interpolation (ADBI) such that the command contour errors can be avoided. Theoretical derivation...
Sample quality plays an important role in tracking-by-learning strategies, but the reliable online samples are hard to be obtained due to challenges of variational environments. By modeling how human visual interest actively guiding the seek of salient regions and movements in video sequences, in this paper, a compositional tracking strategy is proposed based on an integrated saliency map, which is...
Moving object localization is a popular study in contemporary computer vision, provided the fact that many challenging problems, such as illumination changes, obstacles, object shape transformation, etc, are still to be deeply investigated and properly tackled in moving object localization for the time being. In this study, a new clustering-based strategy is introduced to realize the moving object...
A real-time optical camera communication (OCC) system was designed and implemented. The system jointly utilizes 4 intensity levels for each color and 3 colors of each RGB LED of a 16×16 LED array, resulting in a 64-ary color-intensity modulation (CIM) carrying on 6-bit coded information in each symbol. The LED array is refreshed at 82.5 Hz, and a FPGA controlled commercial CMOS image sensor from a...
Transportation costs constitute an important part in delivering goods to customers and have a significant influence on competitive advantage of a company. How to reduce transportation costs. Vehicle routing is a critical factor in reducing transportation costs. An effective scheme to manage fleets and determine vehicle routes for delivering goods is important for carriers to survive. In the existing...
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