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A hardware and software system design for transmission line inspection basing on quadrotor unmanned aerial vehicle (UAV) is proposed in this paper. To enhance the inspection efficiency, real time data processing for transmission line detection and following are required. This paper proposes the design of hardware structure, software structure, as well as a Kalman filter. The real flight experiment...
Image processing is a very popular and widely used technique. In this paper, we propose a framework for realizing reversible image processing, which enables that the users can return the processed image to the original copy without loss. In the proposed method, the original image is firstly processed to get the desired target image by a classic image processing method. Then the original image is reversibly...
Threshold-based caching has been widely researched in the literature of content-centric network. Most of the existing approaches only consider the user experience performance, i.e. the average request delay, in the cache networks. In this paper, we propose to consider the system cost metric of cache utilization ratio, and develop a kind of threshold-based caching algorithm that aims to reduce the...
Cooling rate is the key parameter for characterizing the formation ability of amorphous ribbon, but measured by experimental method is difficulty, to this end, combined heat transfer and solidification theory, applied one-dimensional Fourier heat conduction equations simplified heat transfer model, obtained the temperature and cooling rate distribution of amorphous ribbon in forming process, Then...
Federated environment consists of multiple domains, traditional cross domain authentication model has many defects like weak cross domain ability, overload of authentication server, cookie hidden danger and non-cross domain limitation. The paper analyzes the security risks of the current authentication model, then we propose a cross domain federal identity authentication model, which adopts the multi-agent...
In the last decade, wind energy industry in China has experienced a rapid growth. Up to now, few studies on reliability analysis of Chinese wind farms can be found. In this study, based on the field data of a wind farm in Jiangsu Province of China, the failure and maintenance statistics are classified, and the reliability of main components in the wind turbines is also analyzed. In addition, the effect...
In situ real-time production monitoring of polymer matrix composites is becoming ever more important due to the increasing complexity of composites manufacturing techniques, in conjunction with the adoption of newer materials. This paper presents the design and implementation of a capacitive sensor network for composites production monitoring, i.e., mold filling, (post) curing of the polymer, and...
The most common road right of tram can be described as independent at road section and mixed at the intersection, so the conflict between tram and other types of traffic modes appears. As tramcar has a high operating speed and long braking distance, some potential safety hazards may exist. Paper finds that most tram accident occurs at the intersection and collision with pedestrians has the most serious...
This paper describes the development of a computer vision-based real time displacement measurement system and demonstrated its performance on a large-scale wood truss bridge model. Digital images were captured with a consumer grade video camera. Three common types of computer vision algorithms are compared, including the Lucas-Kanade (LK) template tracking algorithm, inverse compositional (IC) algorithm...
Facebook has recently announced its OpenCellular platform for promoting open-source wireless access technology developments and broader applications. In this demonstration, we would like to show a software defined mobile network that realizes both eNB and EPC key functions according to the 3GPP LTE standard on a general purpose processor (GPP) based computational platform. It is very adaptive and...
This contribution describes an efficient process flow for production of one-time deformable electronic devices based on standard circuit board technology and demonstrates multiple devices fabricated using this technique. The described technology has the potential to streamline and simplify the production of complex user interfaces which typically require extensive mechanical design and many components...
Visible light communication (VLC), which can synergistically provide both illumination and data transmission, is garnering increasing attention. Dimming support is one of the main challenges for VLC systems. Under the requirements of the uniformity illuminance ratio (UIR) according to lighting engineers and the indoor illuminance range standardized by the international organization for standardization...
The traditional text classification methods usually follow this process: first, a sentence can be considered as a bag of words (BOW), then transformed into sentence feature vector which can be classified by some methods, such as maximum entropy (ME), Naive Bayes (NB), support vector machines (SVM), and so on. However, when these methods are applied to text classification, we usually can not obtain...
This paper presents the research and development of an integrated high voltage (HV) power cable condition monitoring and fault localization system. The system consists of the functionalities of online dielectric loss (DL) monitoring, outer sheath and earthing system condition monitoring, and a rapid fault localization system, all based on monitoring of cable sheath currents. Within the distributed...
All the cores of a many-core chip cannot be active at the same time, due to reasons like low CPU utilization in server systems and limited power budget in dark silicon era. These free cores (referred to as bubbles) can be placed near active cores for heat dissipation so that the active cores can run at a higher frequency level, boosting the performance of active cores and applications. Budgeting inactive...
Due to the scarcity of spectrum resources, spectrum sensing techniques are vital for future wireless communication systems. Compared with energy detection methods (ED), feature detection (FD) methods exploit statistical periodicity of transmission signals and have better performance under low signal-to-noise ratio (SNR) conditions. However, for fast time-varying fading channels, the detection accuracy...
High performance of visible light communication (VLC) systems requires overcoming the limitations imposed by the optical wireless channel distortions resulting from path loss and temporal dispersion. In order to design techniques to combat the effects of channel distortions, an accurate VLC channel model is needed. In this paper, we propose a new regular-shaped geometry-based multiple bounce model...
Coupling of acoustic disturbance into microfluidics has been widely investigated for micro-mixing, fluid heating, bioparticle manipulations including trapping, sorting, focusing, and cell lysis etc. Here, we demonstrated a microfluidic system which integrated with micro-fabricated bulk acoustic wave resonator (BAW) working at frequency of 1.54 GHz. The ultra-high frequency thickness vibration mode...
Islanding detection is an important technique for micro-grid connected/isolated control. Traditional passive island detection reliability is bad, while active method have negative influence on power quality, so a new method based on chaotic property was proposed. The main reasons of chaos phenomenon during micro-grid conversion process in both connected/isolated operation modes are studied in this...
In this paper, we proposed an efficient framework for depth estimation from a single 2D face image to apply in 3D face reconstruction. The proposed framework consists of three components. Firstly, we recover the corresponding 2D images from 3D face models of database, and the feature points of these images will be extracted to form the 2D-3D database. Secondly, the same feature points extraction steps...
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