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BP gets local minimization too easily and converges slowly and could not get the global optima. To solve these problems, this paper proposes GA-BP algorithm to predict the purity of vitamin E in obtaining the purity of vitamin E with molecular distillation. The genetic algorithm is applied to optimize the weights of BP neural network and the combination of the advantages of two arithmetic improves...
In aircraft multidisciplinary design optimization, Multi-method Collaborative Optimization Algorithm (MCOA) has been proposed because of the complex mathematical models. However, not only the optimization result is not very precise with general serial collaborative optimization algorithm of MCOA, but also the convergence has not been rigorously proven. In order to improve the accuracy and robustness,...
With the number of available Web services is rapidly increasing, how to compose multiple Web services automatically to fulfill a given request has attracted much attention. This paper proposes a dedicated planner named AWSP (Automatic Web Service Planner) toward this problem. Compared with other AI planners for automatic Web service composition, AWSP is characterized by its two different heuristic...
In order to deal with the defects of the poor convergences and easily immerging in partial minimum frequently, a new algorithm is proposed based on the combination of genetic algorithm and BP neural network, which is called GA- BP algorithm. This algorithm is applied to optimization of initial weights of BP Network, the structure and learn rule. It searches through the total solution space and can...
In this paper, we consider user selection algorithms for Multi-user MIMO systems with perfect or partial channel state information at the transmitter (CSIT). A novel user selection algorithm based on chordal distance is proposed. The basic principle is to serve the user subset in which one is approximately orthogonal to the others. Since the chordal distance relies only on the channel direction information,...
Based on the relaying scheme which permits the relay node to jointly encode the data information from two source nodes, a new network low density parity check (NLDPC) code is designed for the Rayleigh fading channel. Since the log-likelihood ratio (LLR) of the signal received from the fading channel is not a Gaussian random variable, the Gaussian Approximation algorithm cannot be employed directly...
In this paper, a nonlinear model identification method is applied to a thermal plant. The aim of this work is to develop a moderately complex model with interpretable structure for a complex evaporator, which is the main component of Organic Rankine Cycle System. Based on the subtractive clustering algorithm, the T-S (Takagi-Sugeno) model is derived. The clustering centers can be obtained automatically...
Field surveillance is one of the most important applications for wireless sensor networks. Many sensors are deployed in a region of concern to detect any potential targets. On the contrary, intelligent target finds out the deployed sensors to destroy for fear of being detected and leads to defunct surveillance. Due to the importance of sensor nodes, it is necessary to hide them from the scope of target...
Based on a deep discussion on the algorithm of multi-CCD sensor planning, genetic algorithm ant algorithm (GAAA) is proposed in this paper. GAAA is superior to ant colony algorithm in time efficiency and also superior to genetic algorithm in solution efficiency. Through optimizing, it improves the resulting efficiency of digital image processing greatly. moreover, it is more convenient to the latter...
Using GIS technology and the slope stability algorithm, the landslide stability system realizes intellectualized slope monitor calculation. The system can call lots of mainstream limit equilibrium analysis algorithms, read charts and calculate with computer, greatly reduce the influence of errors, and improve the accuracy of the final result, provide reliable basis for monitors. The system is developed...
This paper presents a stratified image hiding scheme based on chaotic algorithm. In the pretreatment process chaotic sequences are used to encrypt the secret image. The histogram of the processed image is similar to that of white noise. A stratified secret data embedding thought is adopted in the embedding process. As the experimental results show, this algorithm has relatively large embedding capacity,...
Skyline attracts more and more attention from academic circle and industrial circle because of its application in multi-criterion decision support, preference answering and data analysis. However, it seems unnecessary to recommend all services in skyline while the number of skyline points is large. The number of services in skyline is always large for the reason that comparability decreases with the...
Considering the multi-source information lack of automation management, analysis and evaluation in network security field, a new network security situational evaluation model based on D-S evidence theory is proposed. This method fuses multi-source alarm information through D-S evidence theory, associates with nodes vulnerability information, integrates with the severity of threats, computes the value...
In recent years, there has been increasing interest in the design of underwater acoustic modems for marine environmental monitoring, underwater structure inspection and sea bottom resource exploitation. As underwater acoustic channels pose difficulties such as multipath, time-space selectivity, frequency dependent noise, and Doppler shifts on transmission, research on adaptive equalizers play an important...
SOA based software is typically based on dynamic reconfiguration, since it is the composition of services. But few works focus on the non-functional reconfiguration of the SOA-based software. This paper presents an approach for QoS driven dynamic reconfiguration of the SOA based Software. The approach can reconfigure a SOA based software to comply with a new QoS constrains by replacing its individual...
With the development of 3G network and internet technology, the rapid upgrading of internet users. It is a trend that IPv6 supersedes IPv4 and the optical network becomes more widely. Integrating a number of hotspot advanced technologies, the “wireless broadband application system for IPV6 optical network cloud computing” is a novel system with practical research importance. The cloud computing platform...
In this paper, we propose a soft value modification (SVM) algorithm, based on which we further propose a new low-complexity iterative decoding technique for the conventional serial concatenated coding system which consists of Reed-Solomon (RS) code and Trellis coded Modulation (TCM) scheme with an interleaver in between. In our decoding technique, the RS decoder is based on Berlekamp-Massey (BM) algorithm,...
The performance analysis of parallel system is critical for tuning, optimizing and algorithm modifying of parallel program. A formal modeling method based on TCPN is proposed in this paper, which makes it possible to organize a complicated parallel system as a set of hierarchical modules and includes a time concept to represent the time taken to execute events and further analyze the performance of...
Theorem proving based on the extension rule is a new reasoning method. Based on the extension rule algorithm RIER, this paper presents a more efficient algorithm HRIER, which uses the heuristic strategy to guide the choosing of restricted searching space. The experiment results show HRIER improves the efficiency a lot, meanwhile it keeps the essence characteristic of extension rule method, namely...
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