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In order to solve the problem of battlefield targets grouping, based on the research on targets key properties, this paper puts forward a method about using stable center of gravity algorithm based on entropy weight. The K-means clustering algorithms advantages and defects are introduced, and the paper makes improvement to the algorithm for its defects. For the difficulty of Selecting of the initial...
Time series analysis is an important data mining task in areas such as the stock market and petroleum industry. One interesting problem in knowledge discovery is the detection of previously unknown frequent patterns. With the existing types of patterns, some similar subsequences are overlooked or dissimilar ones are matched. In this paper, we define patterns with weak-wildcard gaps to represent subsequences...
In this paper we proposed a novel cochannel interference avoidance strategy for outdoor remote medical monitor network. We employ simulated annealing to design the channel allocation algorithm, which is the core of the strategy. We implemented the strategy in the experimental we built at Beijing outer suburb and took a series of experiments to examine the effect of the strategy. The experimental results...
In many network and communication systems, there are larger number of timers used for various applications, the efficiency of timer management algorithm will directly affect the system performance, in many applications, larger number of operations should be periodically triggered. This means many timers should be periodically added, which will consume much computing resources. In the paper, a new...
This paper proposes an inter-domain routing algorithm for multi-domain WDM networks based on hierarchical PCE architecture. The proposed algorithm presents a strategy of selecting k random paths in parent PCE. The simulation indicates that the proposed algorithm outperforms previous methods in term of blocking probability and resource utilization.
Future Long Term Evolution (LTE) Radio Access Network (RAN) will benefit from a significant degree of self-organization. Autonomic Load Balancing (ALB) is considered as an important self-organizing function in LTE RAN. In this work, distributed ALB is achieved by Autonomic Network Management (ANM). Load conditions of eNBs (E-UTRAN NodeB) can be detected. Sizes and shapes of cellular coverage can be...
Physical Cell Identity (PCI) is cell identifier on the physical layer which can be used to create synchronization signals. There is a mapping between synchronization signals and physical cell identity, and then User Equipment (UE) can search cells through this mapping. Traditionally, PCI was configured during network planning process. While with 3G Long Term Evolution (LTE) has been prevalent in the...
According to (M, N) measuring model, a new wireless streaming media loss differentiation algorithm (WLDA) is proposed. And then, a new Wireless TCP-Friendly Rate Congestion Control (WTFRCC) is designed. By theory analysis, the WLDA algorithm can differentiate correctly congestion losses and wireless error losses, it avoids misjudging. By validation with simulation, WLDA can differentiate correctly...
Topology control is an important research direction in wireless sensor networks, by selecting a good topology control mechanisms is good for improving the efficiency of network communication and prolonging the life cycle of network. Based on the analysis algorithms of TopDisc algorithm, this thesis introduces an improved algorithm - proposes a topology control algorithm based on energy and power control...
Under the premise of ensuring the network connectivity and coverage, by selecting a good topology control mechanisms is good for improving the efficiency of network communication and prolonging the life cycle of network. Based on the analysis algorithms of TopDisc algorithm, this thesis introduces an improved algorithm of TopDisc-injecting the surplus of energy into the algorithm. And through analysis...
A parallel algorithm, namely Parallel Block Odd-Even Reduction (PBOER) algorithm, is proposed to solve block tridiagonal linear systems on multi-computers. PBOER algorithm is the combination of PDD and OER method, and is thus highly accurate and scalable. The PBOER is highly parallel and provides approximate solutions that equals to the exact solutions within machine accuracy. The method proposed...
As the complexity of processors grows, the bottleneck of verification remains in generating suitable test programs that meet coverage metrics automatically. Coverage directed test generation is a technique to automate the feedback from coverage analysis to test generation. It is very important to solve the constraint satisfaction problem for a flexible coverage directed test generator with complex...
In this paper, we put forward a weak conjunctive normal form for G3, which is similar to the conjunctive normal form for classical propositional logic. We also give two algorithms to reduce a formula to weak conjunctive normal form, where one is based on charactering countermodels in model-based-formulas, and the other is based on rewriting formulas according to transformation rules. In the end, we...
A parallel algorithm, namely parallel block diagonal dominant (PBDD) algorithm, is proposed to solve block tridiagonal linear systems on multi-computers. This algorithm is based on divided-and-conquer idea of the PDD method. When the systems is strictly block diagonal dominant, the PBDD is highly parallel and provides approximate solutions that equals to the exact solutions within machine accuracy...
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