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The Prophet routing algorithm is a multi-copy algorithm which is based on historical information and transitive probability, which selects the relay node with a high probability to encounter the destination node. However, the selection of a relay node does not consider the current congestion level of node. Even if the current relay node has a high delivery probability to the destination node, it may...
Based on the foundation of mission successfulness, we put forward the concept of mission maintainability assessment. Analyzing the general process of mission maintainability assessment of complex system and studying the basic method of mission maintainability assessment. Based on the state evaluation of related functional unit, we put forward the thoughts that parallel part as a whole which contain...
With the growing scale of current computing systems, traditional configuration tuning methods become less effective because they usually assume a small number of parameters in the system. In order to handle the scalability issue of configuration tuning, this paper proposes a cooperative optimization framework, which mimics the behavior of team playing to discover the optimal configuration setting...
In this paper, propagation process of malicious code in computer networks are analyzed by discrete-state Markov model. Computer system without defense mechanism of virus in the networks can be classified: susceptible(S), quarantine(Q), infection(I) and health(H). But the state of computer system is varying. These varieties are only relative to the state at present, and are disrelated to the past state...
In this paper, a novel channel allocation method is proposed to reduce the time-varying effects in downlink OFDMA systems. This method makes use of a Kalman filter in order to predict the user SINR and rate in the next time slot. Based on this estimated rate, the available subcarriers are assigned according to a rate greeding algorithm. Compared with the rate-craving greedy (RCG) algorithm and the...
Named entity recognition (NER) is one of the key techniques in natural language processing tasks such as information extraction, text summarization and so on. Chinese NER is more complicated and difficult than other languages because of its characteristics. This paper investigates Chinese named entity recognition based on CRFs, and implements three main named entities, person, location, and organization...
Call admission control (CAC) is one of the most important parts in radio resource management of CDMA networks, and it has an important effect on the quality of service (QoS). The most concern of traditional CAC strategies is to harmonize the blocking probability and dropping probability, so as to maximize the resource utility. With the development of radio network, not only resource utility is the...
Call admission control (CAC) is one of the most important parts in radio resource management of CDMA networks, and it has an important effect on the quality of service (QoS). The most concern of traditional CAC strategies is to harmonize the blocking probability and dropping probability, so as to maximize the resource utility. With the development of radio network, not only resource utility is the...
An adaptive strategy based stable link selection algorithm is proposed in this paper, in which the stable neighbor metric and local movement metric are defined. On the basis, the stability probability of each link is computed adoptively to find the most stable link or route in a route discovery. The simulation results show that our algorithm can effectively adapt to the network conditions, and outperforms...
In ad hoc networks, selecting stable links is important for QoS provisioning. A mobility prediction model based link stability metric algorithm is proposed in this paper, in which the stable neighbor metric and local movement metric are defined. Mobility prediction model is applied to predict stability probabilities between each mobile node (MND) and its neighbors by use of these two metrics for finding...
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