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During the construction process, the project progress would be affected by the various indeterminate factors inevitably, which may cause increased risk of engineering postpone or difficulty in cost control. Maximum entropy principle was introduced into project risk management by studying information entropy and random network theory, which was applied in project schedule and cost control. And it was...
This paper proposed a chaotic image scrambling scheme based on sorting transformation. The algorithm calculates the permuting address codes by sorting the chaotic sequence. Therefore, the scheme does not require knowing the probability density function of the chaotic orbits in advance, thus not only facilitating the choice of chaotic systems but also reducing the complexity of the scheme. The paper...
In this paper, we investigate an incremental opportunistic relaying scheme where the selected relay chooses to cooperate only if the source-destination channel is of an unacceptable quality. In our study, we consider regenerative relaying in which the decision to cooperate is based on a signal-to-noise ratio (SNR) threshold and takes into account the effect of the possible erroneously detected and...
Palmprint identification is a subcategory of biometrics identification, which can be efficiently used to identify the people. Palmprint-based identification is currently a potential alternative to human identification method of a well known fingerprint-based identification. For example, if the hand of the identified person is dirty, the accuracy of fingerprint-based identification is distorted, while...
Aeroplane design is defined by many objectives. One of them is the reduction of weight while maintaining safety, functions and performance. As power measurement campaigns have revealed, weight can be saved, as the electrical system exhibits low capacity utilisation. This is, as there are many requirements (on certification, safety and function) to meet. Also, there are systems, which do not exhibit...
The performance analysis of mobile-to-mobile (M2M) radio communications over double Hoyt fading channels perturbed by additive white Gaussian noise (AWGN) is considered. First, the probability density function (PDF) of the instantaneous signal-to-noise ratio (SNR) per bit is derived under the assumption that the fading channel is a concatenation (product) of two independent but not necessarily identically...
Distributed antenna systems (DASs) are expected to play an important role in the delivery of high data rates in future cellular networks. In DASs, the multipath fading and shadowing effects have to be analyzed concurrently due to the geographical scattering of the distributed antenna ports. The Gamma-Gamma (generalized-K) probability density function (PDF) has been adopted recently to model composite...
Exact average capacity results for L-branch coherent equal-gain combining (EGC) in correlated and uncorrelated fading channels are not known. This paper develops a novel framework (approach) for capacity analysis of L-branch EGC in generalized fading channels. In addition, Gamma shadowed generalized Nakagami-m fading model is proposed in order to statistically model the fading environments in high...
In this paper, probability distributions of new and handoff call channel holding times in mobile cellular networks are derived under the assumption that cell dwell time has generalized Coxian distribution. It is shown that when cell dwell time has a generalized Coxian distribution, the resulting residual cell dwell time has generalized Coxian distribution as well. Furthermore, both new and handoff...
The IEEE 802.16m standard is developed to support advanced services with high data rate and high mobility for the next generation broadband wireless access networks. A novel sleep mode operation is specified in the standard to conserve the energy of mobile devices. In this paper, a concise analytical model for the sleep mode operation of the IEEE 802.16m is proposed. The effects of both downlink and...
First of all, the reverberation statistical theory based on the unit-scatterer model is stated in this paper, and the interface reverberation model is established based on it. In the process of modeling, a new approach that the number of contributive scatterers changed with time is proposed, and the calculation method is simplified when using convolution of signal and scatterring characteristic function...
Visualization has been around for more than two decades. Various techniques have been proposed, and some have found their fitting places in many applications in documentation visualization, scientific visualization, etc. To our knowledge, no one has applied the Weibull distribution's probability density functions whose flexibility lies in their adjustable shape and scale parameters to the information...
PC-SVM is a new developed support vector machine classifier with probabilistic constrains which presence of samples probability in each class is determined based on a distribution function. The presence of noise causes incorrect calculation of support vectors thereupon margin can not be maximized. In the Pc-SVM, constraints boundaries and constraints occurrence have probability density functions which...
In this paper, we consider the Kth opportunistic relaying based on amplify-and-forward (AF) transmission over independent and non-identically distributed relay channels. In the best relay selection scheme, only the best relay forwards the source message. However, the best relay might be unavailable, so we could possibly resort to the second, third or generally the Kth best relay. We derive the closed-form...
The statistical properties of the capacity of narrowband double Hoyt fading channels are studied. Toward this end, analytical expressions for the probability density function (PDF) and cumulative distribution function (CDF) of the instantaneous channel capacity process are derived. Furthermore, for the characterization of the dynamical behavior of the time-varying channel capacity, expressions are...
In cooperative communication networks, the use of multiple relays between the source and the destination was proposed to increase the diversity gain. Since the source and all the relays must transmit on orthogonal channels, multiple relay cooperation is considered inefficient in terms of channel resources and bandwidth utilization. To overcome this problem, the concept of best relay selection was...
In this paper, we analyze the ergodic capacity (per unit bandwidth) and Average symbol error probability (ASEP) of an incremental relaying protocol used in conjunction with opportunistic relaying and consider a non-regenerative wireless relay network with Rayleigh fading channels. We consider a selection combining technique at the destination in order to combine the two signals, one from the direct...
We consider two different users sharing the same spectrum resource, interfering with each other, under outage performance requirements for both the users. We derive a practical condition to enable the spectrum-sharing under simultaneous outage performance. Furthermore, when the condition is fulfilled, we provide equations to define the two-dimensional region of allocated powers (P1, P2), for the two...
In this paper we investigate the performance of proactive opportunistic relaying with amplify-and-forward (AF) protocol over independent and non-identically distributed Generalized Gamma fading channels. The Generalized Gamma distribution is very versatile and accurately approximates many of the commonly used channel scenarios for multipath, shadow and composite fading. We show that opportunistic...
Based on a texture descriptor which intrinsically defines the geometry of textures using semi-local image information and tools from differential geometry, a fast active contour segmentation model for color texture image is proposed. In this model, we use the popular Bhattacharyya distance between the probability density function (pdf) to design the data fitting term which distinguishes the background...
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