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This paper presents a receive windowing (RW) based demodulation technique for mobile OFDM systems. With the aid of RWs, we firstly split an OFDM block into non-overlapped intervals, and then proposed a weighted combination to compensate for the channel time-variation across windowed blocks. The optimal design for RWs is considered with respect to maximizing the signal-to-interference plus noise ratio...
This paper introduces a method based on compressive sensing to acquire voice signals from distributed wireless sensors. The method uses compressive sensing technology to sample, transmit and recover data to reduce the sampling rate and further compress the data. As the voice signals in the discrete cosine transform domains are approximately sparse, this paper builds a JSM-1 based model and uses the...
In this paper, a side information free partial transmit sequence (PTS) technique is proposed to reduce the peak-to-average power ratio (PAPR) for orthogonal frequency division multiplexing (OFDM) signals. Based on superimposed training (ST), the combined channel response with the phase factors of PTS can be estimated within each interleaved PTS sub-block, and thus enables data recovery without the...
Material removal simulation for five-axis machining using a solid-based method shows animations of Numerical Controller (NC) milling as motions of a cutter. Due to the three-dimensional boolean operations between solids the simulation should run on a platform based on Graphic Processing Unit (GPU). We propose a new method of a tool path error estimate for five-axis machining using machining zones...
In this paper, a detection method of contours of wheels for high real-time is proposed. Since the classic codebook algorithm is difficult to deal with the situation such as global sudden light changes, a improved codebook algorithm is presented. First of all, the moving vehicle is extracted in the video recording the side of vehicle by the improved codebook algorithm. And then the contours of the...
The ITER in-vessel coil system includes Vertical Stability (VS) coils and Edge Localized Mode (ELM) coils. There are two large VS ring coils, one upper and one lower. Each has four turns which are independently connected. The VS coils are needed for successful operation of ITER for most all of its operating modes. The VS coils must be highly reliable and fault tolerant. The operating environment includes...
Bot detection methods that rely on deep packet inspection (DPI) can be foiled by encryption. Encryption, however, increases entropy. This paper investigates whether adding high-entropy detectors to an existing bot detection tool that uses DPI can restore some of the bot visibility.We present two high-entropy classifiers, and use one of them to enhance BotHunter. Our results show that while BotHunter...
Bot detection methods that rely on deep packet inspection (DPI) can be foiled by encryption. Encryption, however, increases entropy. This paper investigates whether adding high-entropy detectors to an existing bot detection tool that uses DPI can restore some of the bot visibility. We present two high-entropy classifiers, and use one of them to enhance BotHunter. Our results show that while BotHunter...
In this paper, a novel direct payload position control strategy is proposed based on Active Disturbance Rejection Control. External disturbance as well as internal unknown dynamics are estimated in real time and accommodated actively to reduce the control problem to a simple one. The proposed method is compared with the existing input shaping method with promising results.
The intelligent document not only has the advantages of the traditional electronic document, but also specifies the dynamic operation behavior of a document, which makes the document able to interact with other applications when it's displayed and greatly enhances the document processing capacity. The article reviews the development of the intelligent document, proposes a Web Service-based architecture...
In this paper, we analyze the outage performance of MIMO AF two-way relaying system over Rician fading channels. Specially, all nodes in the system are mounted with multiple antennas, and a joint transmit/receive antenna selection scheme is employed. First, we derive an approximated outage probability expression, which matches the simulated outage probability quite well from medium to high SNR region...
Project schedule control is one of the important control goals in project management. It is an important measure to ensure that the project is completed safely, reasonable arrangements for the resources supply and saving cost. Any of the projects must be by means of scientific planning and control methods in order to achieve the desired goals. Deviation analysis is an ongoing work in the progress...
Based on the Mason equivalent circuit, a theoretical model of ultrasonic signal generated by controlling the excitation signal has been formulated. Large TBWP (time-bandwidth product) ultrasonic signals can be generated by driving a piezoelectric transducer with modified LFM (linear frequency modulation) signal. Better performances are obtained in the waveform, bandwidth and linear time-frequency...
Synthetic Aperture Radar (SAR) image quality parameters attained from the images are always different from system specification in resolution and side lobe intensity. It is difficult to locate effective point targets for calculating of SAR image quality parameters of impulse response function (IRF) characterization. In this paper, an objective image quality assessment method is proposed based on image...
Under the condition of market economy, time is money and efficiency is life. Whether a project can be finished in time is one of the most important issues of it and also one of the targets in project management. Calculation for timing plan parameters only makes the initial planning parameters of project, and it did not consider a variety of constraints caused by manpower, resources and cost. Timing...
The popularity of microblogging has drawn an increasing amount of attention from users keen to expand friendship, facilitate information sharing and seeking. Given the extensive use of microblogging services, there is a pressing need to understand user acceptance behavior in microblogging services. Although there are few studies exploring the factors underlying popular or successful microbloggings,...
Owing to the separate structure, low coupling coefficient and limited power factor of the contactless power system of AUV(Autonomous Underwater Vehicle), it is necessary to apply compensation circuits for maximizing power factor and increasing the efficiency of power transmission. In deep sea, the magnetic core of this system would deviate with the impact of water flow, on which condition the coupling...
This paper is concerned with the problem of superimposed training based channel estimation for orthogonal frequency division multiplexing (OFDM) modulated amplify-and-forward (AF) relay networks in doubly selective environment. A ‘subblockwise’ linear assumption based channel model is proposed to represent the mobile-to-mobile doubly selective channels. We then propose novel strategy that allows the...
Along with large-scale application of wind power, power forecasting becomes increasingly important in handling wind intermittency and integrating wind power to electric grid. This paper proposes a forecasting combination approach which makes use of the forecast results of NN (Neural Networks), SVM (Support Vector Machine), and FIS (Fuzzy Inference System) models to improve the forecast accuracy. Three...
Traditional CNC (computer numerical control) system which Based on ISO 6983 [1] is separated from the CAM module, so some important information such as 3D geometry, tolerance information and surface roughness is lost that information can not be completely transferred between CNC system and CAM. In order to improve the functionality and expansibility of the existing CNC interpretation technique, a...
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