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Images are often corrupted by impulse noise in the procedures of image acquisition and transmission. In this paper, we propose a novel denoising method, which is based on the decision-tree and edge-preserving techniques, for the removal of random-valued impulse noise. Extensive experimental results show that the proposed technique not only preserves the edge features, but also obtains excellent performances...
In this paper, a simple method for the facial expression detection to identify the normal and unusual of expression variations of the human face is proposed. The approach uses the binary edge image to present the shape of facial expression. The modified Hausdorff distance measure is adapted to our approach to compare between the unusual and normal face expression. In our algorithm, it just needs to...
The paper outlines the status of Variable Message Signs (VMS) on urban expressway in Beijing, and analyzes the reason for benefit generated by VMS. Firstly, the criterion system of VMS evaluation is built. Secondly, the means of data collection related to criterion system are ordered. Thirdly, the approach to VMS evaluation is determined as with or without method and cost-benefit analysis, which is...
An Air Bearing Strip Flatness Detector (ABSFD) , manufactured in China, was adapted to measure the strip flatness in cold rolling mills on-line. This paper presents how it works, static and dynamic characteristics, part edge strip cover roller and its transient response. It has been successfully serviced on line of 1400 aluminum foil cold rolling mill for six years, which the rolling speed is up to...
The reasonable evaluation of forestry land is the basis of marketization of the forestry assets. Based on the evaluation data for 325 forestry lands from seven forest farms of Ning'an city, which is intended to transfer in the country, this paper takes Larch, mongolian scots pine and larch-mongolian mixed forests as instances to establish CHAID decision tree model in order to classify and analyze...
The traditional Canny edge detector is designed to detect the edges of gray image, the color image must be converted to gray image, this method only uses the luminance information of color image, and don't take into account the chroma information, therefore, it misses some edges. In this paper, an improved Canny edge detector against impulsive noise based on CIELAB space is proposed, the color image...
Under the emergency accidents, implementation of the rescue measures is directly related to the traffic state identification. However, lacking of information collecting caused by road damage would lead to the results of identification by conventional fixed detector had a larger deviation. Although the existing way of probe vehicle with a large coverage area but also from an environmental impact, the...
Inspired by the change of antibody concentration, network security system can reduce the false alarm rate effectively. In this paper, we discuss the nonlinear dynamics of antibody number in the antibody concentration inspired network security method. According to the conclusion of this paper, we can get the general calculation approach to compute the accumulation of antibody number in the antibody...
The immunoglobulin is one kind of special material for protecting the biological body far way from the invasion of harmful foreign antigen. When the biological body is under the attack by the continuous harmful foreign antigens, the set of immune cell in biological immune system will secret much immunoglobulin to neutralize them. Inspired by the process of immunoglobulin secretion in biological body,...
In a monaural polyphonic context, music transcription and specifically, multiple-F0 estimation systems have achieved promising results in the last decade. However, most of these systems present intermittent misses of pitch within a note or inaccurate definitions about onsets and offsets due to frame-by-frame analysis. In this paper, we propose a multiple-F0 estimation system which extracts a set of...
In some frame-based OFDM applications such as WLAN and WMAN, the channel estimation is accomplished through the aid of the preamble. By means of the preamble, the estimated channel is only well applied under the assumption of a static channel status within the frame. If we consider a time-varying channel status in those applications, the channel tracking has to be performed without the aid of pilots...
Cyclostationary detection is regarded as a major method for spectrum sensing in cognitive radio and other applications as well. The rationale behind the detection is that the second order statistic of the interested signal is periodical. The period is therefore used as the critical feature for detection. In practice, due to clock error or oscillator error or other errors, the detector is hardly able...
Spectrum sensing is one of key enabling techniques to advanced radio technologies such as cognitive radios and ALOHA. This paper presents a novel non-cooperative spectrum sensing approach that can achieve a good trade-off between latency, reliability and computational complexity. Our major idea is to exploit the first-order cyclostationarity of the primary user's signal to reduce the noise-uncertainty...
In this paper, we present a low-complexity list sphere search algorithm for achieving near-optimal a posteriori (APP) detection in iterative detection and decoding (IDD). Motivated by the fact that the list sphere decoding searching fixed number of lattice points is inefficient in many scenarios, we design a criterion to search lattice points with non-vanishing likelihood and derive the optimal sphere...
A simultaneous transmission spatial modulation (SM) technique is introduced in this paper. Unlike in conventional SM where only one antenna transmits at a time, the simultaneous spatial modulation (SSM) transmits from two antennas at the same time. The proposed technique utilizes a unique symbol to antenna assignment algorithm at the transmitter and the SM optimum detector at the receiver. The paper...
In this paper, we investigate the benefit of joint network-channel distributed coding for the multiple-access half-duplex relay channel. In contrast with previous work, the medium access is not orthogonal and the source-to-relay links are not error-free, which render the reality of wireless environments and notably complicate the problem. Indeed, due to the broadcast nature of wireless media, transmitted...
For multiple-input multiple-output (MIMO) wireless communication system with minimum mean square error (MMSE) detection, power allocation between pilot and data symbols is investigated under MMSE channel estimation in this paper. We first propose a novel soft-output MMSE MIMO detector by taking the channel estimation error into consideration. Then, by random matrix theorem, we propose an effective...
In this paper, we propose a parallel hybrid merge-select sorting approach for the implementation of K-best list sphere detection (LSD) multi-input multi-output (MIMO) decoder based on a recently developed novel Reconfigurable Instruction Cell Array (RICA). Several popular sorting algorithms adopted in MIMO decoding are analyzed and mapped onto our proposed platform. We discuss the targeted K-best...
This paper proposes a new coherent detector that exploits the real zero (RZ) concept for signal recovery. The detector recovers the complex envelope consisting of in-phase (I) and quadrature (Q) components of linear quadrature amplitude modulation (QAM). The received signal before amplification is processed by RZ conversion, after which the converted signal can be amplified by a severely distorted...
In this paper we focus on compressive sampling (CS) based ultra wideband (UWB) differential detection. We formulate an optimization problem to jointly recover the sparse received UWB signals as well as the differentially encoded data symbol. We utilize an alternating direction method of multipliers (ADMoM) to solve this joint optimization problem. Our proposed joint recovery method outperforms the...
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