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Cooperative relaying has been shown to be an effective method to combat fading in wireless communications. Among relaying strategies, distributed ones are more attractive because of the simplicity, scalability, robustness and low overhead incurred. In this paper, two previously proposed distributed relaying strategies are investigated: Timer-based Best-Select relaying and M-group Dis-STBC All-Select...
In the most actual grounding project, we always come across a block or some blocks of soil whose resistivity is higher than that of soil surrounding them, that is heterogeneous soil. Effects on grounding resistance by heterogeneous soil under different conditions are different. On the basis of simulation by grounding analyzing engineering software CDEGS, this paper analyses effects on grounding resistance...
Learning and memory, which are important functions of the human brain, are the foundations of thinking. Revealing the learning and memory mechanism of human brain is the core objective and main development way of the intelligent science. Improved human brain functional structure model, a memory prediction structural framework on the brain structure and function are proposed. And then we work out a...
The summation of two harmonic voltage vectors at same frequency is only certain if their amplitudes and phase angles are well known. Therefore, there are many cases where the difference of phase angles between harmonic voltage vectors is unknown. In calculation of the steady state rating of the a.c. harmonic filter equipment, algebraic summation method is often used in determining maximal harmonic...
In the past, the research on PWM pneumatic linearized system mainly focused on control method and electro-magnet switch features, there are little reports on the structural parameter design of pneumatic valve and the mathematical model of pneumatic part. This article took the PWM servo system of the double-acting cylinder as example, discussed the linear analysis method of PWM pneumatic system, given...
In the paper, model of looper height control system with the disturbance, input-delay and constraints on control input are analyzed. In view of engineering practice, a class of robust model predictive control algorithm based on the LMI is presented, where constraints on control input are taken into account to prevent large input stretching the strip and doing harm to hot strip mills. Further more...
In this paper, I utilize a new approach to gathering traffic data over a continuous-flow of traffic rather than at discrete locations in the vehicle-to-vehicle-to-infrastructure (V2V2I) Intelligent Transportation System Architecture, which is a hybrid of the vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) architectures. At present, many existing technologies such as loop detectors and...
Combining multiple classifiers combination, sampling techniques, and more appropriate evaluation metrics, we first compare the selection of multiple classifiers combination based on GMDH(S-GMDH) and other classification methods on nine class imbalance data sets; we analyze the change of classification performances with and without using sampling. Then we further do customer churn prediction on `churn'...
Partial transmit sequences (PTS) is an effective technique to reduce the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing signals. However, the conventional partial transmit sequence (PTS) technique requires an exhaustive searching over all the combinations of the given phase factors, which results in the computational complexity increases exponentially with the number...
Decision rules of fault diagnosis were acquired after analyzing the inconsistent fault information system. By converting inconsistent information system into a consistent one based on the application of generalized decision function of inconsistent information system of rough sets and then by reducing the condition attributes of fault diagnosis based on the compatible relation of rough sets, relative...
Joint power allocation, relay selection, and sub-carrier assignment are critical and challenging for achieving full benefits of OFDM based cooperative relay networks. In this paper, we study such a problem in a dual-hop multi-relay OFDM system with an objective of maximizing the spectral efficiency under a total power constraint. The system consists of a pair of source and destination and multiple...
Now with the competition of the enterprise globalization gradually, so enterprise which want to participating competition, not only know their own circumstance about the enterprise themselves, but also know the circumstance about the rival. This need collection of the enterprise intelligence efficiently. The features of the enterprise Competitive Intelligence and the problem of the traditional competitive...
In this paper, we have established one credit risk evaluation model based on learning vector quantization respectively. This model is used to identify two patterns samples of Chinese listed companies, including training samples of 285 listed companies (59 companies with special treatment and 226 normal companies) and test samples of 117 listed companies(29 companies with special treatment and 88 normal...
In this paper, we study the theory of generalized regression neural networks, a kind of radial basis network that is often used for function approximation, and apply it for the forecasting of the Shanghai composite index of the Chinese stock market. The raw data consists of 4245 observations of daily closing values of the Shanghai Composite Index spanning the trading dates December 19, 1990 to April...
In this paper, we have established and compared two credit risk evaluation models based on self-organizing feature map neural network and learning vector quantization respectively. The models are used to identify two patterns samples of Chinese listed companies, including training samples of 285 listed companies (59 companies with special treatment and 226 normal companies) and test samples of 117...
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