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Target segmentation is the basic work of the synthetic aperture radar (SAR) image interpretation. As for aircraft, it is difficult to accurately extract the target from the background due to its complex structure. This paper proposes a refined segmentation method for aircraft target, in which the ratio of exponentially weighted averages (ROEWA) operator is used to produce the edge map and the shape...
To assess bearing capacity redundancy of asphalt pavement, the strength reserve factors and stiffness reserve factors are analyzed as indexes. The reserve strength is defined as the difference between allowable stress and calculated stress in asphalt pavement. And reserve strength factor is the ratio of reserve strength to allowable stress. The reserve strength of each layer will be given for different...
In this paper, an approach to synthesize compressor trees in High-level Synthesis (HLS) for FPGAs is proposed. Our approach utilizes the bit-level information to improve the compressor tree synthesis. To obtain the bit-level information targeting compressor tree synthesis, a modified bitmask analysis technique based on prior work is proposed. A series of experimental results show that, compared to...
Color-image graying operation is an important step for an image processing system. The gray image is the basis of subsequent image processing operations. This paper surveys the novel research achievements of the color-image graying algorithm, and discusses their two main classes, i.e., the weighting algorithm and the extreme algorithm. For the first class, we study three color-image graying algorithms,...
This paper proposes a novel infrared camera array guidance system with capability to track and provide real time position and speed of an air robot during a landing process. The system mainly include three novel parts: (1) Infrared camera array and infrared laser lamp based cooperative long range optical imaging module; (2) Large scale outdoor camera array calibration module; and (3) Laser marker...
It is the basis of realization ship recognition to accurately extract geometric parameters of the ship target in synthetic aperture radar (SAR) images. Due to the unique SAR imaging mechanism, speckle noise, azimuth ambiguity and side lobe effect seriously impact on geometric parameter estimation of the ship target. Therefore, a method is presented to extract geometric parameters of the ship based...
This paper proposes a novel registration method for optical and SAR images which is based on straight line features and mutual information. Firstly, different edge detectors are employed to detect the line segments in both optical and SAR images respectively. Then, through the Hough transform and a straight line fitting and filtration method, the main straight lines of each image are extracted and...
An electrical-balance duplexer (EBD) is a tunable RF front-end concept that seeks to address several key challenges of 4G and 5G mobile systems [1]. The basic principle is shown in Fig. 20.8.1. Duplexer isolation is achieved when the signals in paths 1 and 2 cancel and prevent the TX signal from appearing at the RX port. This cancellation is achieved by “balancing” the antenna impedance ZANT with...
In this paper, we investigate the dynamics of Chinese stock market from a complex network perspective, based on daily fluctuations of all stocks during 1906 working day period from 2005 to 2012. In the network being constructed, each node is a stock, and each edge indicates the time correlation coefficient of two stocks over a window of T days. The network evolves chronologically as the window slides...
In this work, a low-delay common subexpression elimination (LDCSE) algorithm is proposed. Unlike the previous common subexpression elimination (CSE) algorithms, which mostly focus on area, the aim of the LDCSE algorithm is to optimize both area and delays in hardware implementations of constant matrix multiplication over the GF(2m). A lower computational complexity gate-level delay computing method...
This paper analyzes the error of digital control PFC system in the presence of digital signal processing, the control loop of PI, PID controller is equivalent to IIR digital filter, the mathematical statistics of errors by the control loop is calculated and the transfer model of noise in the system is gave. these works for the digital control PFC system to choose the right processor and reduce the...
This paper presents a 1.2−2.6GHz 2×12 bit Direct Digital RF Modulator (DDRM) realized in 28nm CMOS. The digital cartesian transmitter features baseband sampling speeds up to LO. The intrinsically linear architecture features current-mode operation at 25% duty cycle, which requires less predistortion than existing digital transmitters. The applied digital intensive LO modulation reduces the power consumption...
This paper presents an efficient mitigation approach for duty cycle mismatch of in-phase and quadrature upconversion signals in digital transmitters. This approach is supported by a mathematical analysis of the baseband equivalent impact of duty cycle mismatch. An efficient digital pre-distortion method is proposed to eliminate the distortion impact. Simulation results show that, for both 64-QAM and...
Watermarking and data hiding are important tools to protect digital multimedia contents. To reduce the interference effect of the host signal for the conventional multiplicative Spread Spectrum (MSS) embedding scheme, this paper proposes a novel correlation-and-bit-aware multiplicative Spread Spectrum (CMSS) embedding scheme. This scheme exploits the correlation between the host signal and the watermark...
As a disruptive solution exploiting the intrinsic speed of deeply scaled CMOS technology, digital RF transmitter has attracted extensive attention for its capability to handle multiple radio standards. However, deeply scaled nano level technology has both pros and cons, so that state-of-the-art designs still suffer from the combination of a large number of non-idealities that are inherent in deeply...
Due to the increasing demand for communication bandwidth combined with the scarceness of free spectrum, the complexity and versatility of 4th-generation modulation schemes is greater than ever. In particular, the LTE standard defines multiple RF bands and groups OFDM modulated subcarriers into Resource Blocks (RB) that can be flexibly used within the allocated channel bandwidth. When the transmitted...
With the rapid development of Cloud computing, Internet of Things and social network technologies, the network data are increasing dramatically. The security of massive data interaction has attracted more and more attention in recently years. This paper discusses the encryption principles, advantages and disadvantages of some mainstream massive data encryption technologies, i.e., the encryption technology...
Robust detection and tracking of multiple people in cluttered and crowded scenes with severe occlusion is a significant challenging task for many computer vision applications. In this paper, we present a novel hybrid synthetic aperture imaging model to solve this problem. The main characteristics of this approach include: (1) To the best of our knowledge, this algorithm is the first time to solve...
Paper black liquor with the colour five million times and COD concentration 7028 mg/L were researched with CWAO method. The single factor experiment to determine the papermaking black liquor reaction pressure influence on process were done. When the reaction pressure is increased 3.5Mpa by 1.5Mpa, the best decolored rate is up to 46.41% and 61.05% accordingly. the removal rate of COD is up to 40.24%...
A new image encryption algorithm based on pixels is proposed in this paper. All the strategies, programs, parameters, encryption and decryption steps and other key technologies are given in detail. First, scrambling the image pixels, then through the method of watermark increasing the difficulty of its decoded. At last, choose a camouflaged image to vision or the pixels of the true image, getting...
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