Journal of Systems Engineering and Electronics

This paper presents a new fuzzy multiple criteria (both qualitative and quantitative) decision-making (MCDM) method based on fuzzy relational degree analysis. The concepts of fuzzy set theory are used to construct a weighted suitability decision matrix to evaluate the weighted suitability of different alternatives versus various criteria. The positive ideal solution and negative ideal solution are... View full abstract»

This paper studies the exponential stability of interval time-varying dynamical system with multidelay. By the matrix measure and delay differential inequality, some sufficient conditions for exponential stability of interval timevarying dynamical system with multidelay are established. These conditions are an improvement and extension of the results achieved in earlier papers. Finally, a numerica... View full abstract»

This paper studies the robust stochastic stabilization and robust H∞ control for linear time-delay systems with both Markovian jump parameters and unknown norm-bounded parameter uncertainties. This problem can be solved on the basis of stochastic Lyapunov approach and linear matrix inequality (LMI) technique. Sufficient conditions for the existence of stochastic stabilization and... View full abstract»

An optimal preview method is applied to the design of terrain following controller for cruise missile. In this method, tracking errors and control increments are both considered in the quadratic cost function. Integrating the general optimal servo system with a preview feedforward compensation that feeds forward future command and future disturbance produces an optimal preview servo system. In the... View full abstract»

This paper is concerned with the robust H∞ control with exponent stability for a class of time-delay uncertain systems Attention is focused on the design of controllers such that the resulting closed-loop system not only is exponentially stable but also satisfies, H∞ disturbance disturbance attenuance via memoryless state feedback control. Sufficient conditions ... View full abstract»

In contrast to the main stream of studying the chaotic behavior of a given map, constructing chaotic map has attracted much less attention. In this paper, we propose simple analytical method for constructing one-dimensional continuous maps with certain specific periodic points. Further, we obtain results for the existence of chaotic phenomenon in the sense of Li and Yorke. Some examples are also a... View full abstract»

The on-line computational burden related to model predictive control (MPC) of large-scale constrained systems hampers its real-time applications and limits it to slow dynamic process with moderate number of inputs. To avoid this, an efficient and fast algorithm based on aggregation optimization is proposed in this paper. It only optimizes the current control action at time instant k, while other f... View full abstract»

Speckle filtering of synthetic aperture radar (SAR) images while preserving the spatial signal variability (texture and fine structures) still remains a challenge. Many algorithms have been proposed for the SAR imagery despeckling. However, simulated annealing (SA) method is one of excellent choices currently. A critical problem in the study on SA is to provide appropriate cooling schedules that e... View full abstract»

Performances of BPSK, balanced-quaternary modulation, dual-quaternary modulation and complex-quaternary modulation in direct-sequence spectrum-spread (DS-SS) system are discussed in this paper. Based on the criterion the power of original signal is the same, it is shown that complex-quaternary modulation has the best performance, and dualquaternary modulation degrades 2dB. Moreover, the frequency ... View full abstract»

The near-field distribution and far-field pattern of a monopulse ring-focus shaped reflector antenna are studied. The four-fold integral appearing in the formulation by using PO method is converted into a triple integral for the near-field case and a double integral for the far-field case by applying the Fourier series expansion. Good agreements have been achieved between theoretical and experimen... View full abstract»

The modern war features a highly distributed coordination. In the face of great time constrains, it is important to change command organizations to adapt to the real environment. Therefore it's a key step to set up adaptive C2 teams. In this paper, the relational problems about distributed C2 organizational structure adaptation are discussed, and the methodology for team decision-making design bas... View full abstract»

In the Bayesian game models, the uncertainty is described with probability, but sometimes the uncertainty in practice is given by some fuzzy parameters, and the objectives of players may be not to maximize the expected payoffs. In this paper, a new subjective equilibrium is given for fuzzy games. We make a powerful comparison with Bayesian and equilibria for Stackelberg duopoly game with fuzzy cos... View full abstract»

Power control is an important technique in WCDMA mobile systems for both increasing system capacity and guaranteeing the required QoS (time delay and wireless link transmission quality) of multimedia services. The optimum power control for narrow band CDMA cellular systems is a problem of single threshold optimization. Because these systems have only one type of traffic and have the same QoS requi... View full abstract»

With the development of large-scale text processing, the dimension of text feature space has become larger and larger, which has added a lot of difficulties to natural language processing. How to reduce the dimension has become a practical problem in the field. Here we present two clustering methods, i. e. concept association and concept abstract, to achieve the goal. The first refers to the keywo... View full abstract»

In this paper, we present a cluster — based algorithm for time series outlier mining. We use discrete Fourier transformation (DFT) to transform time series from time domain to frequency domain. Time series thus can be mapped as the points in k — dimensional space. For these points, a cluster — based algorithm is developed to mine the outliers from these points. The algorithm f... View full abstract»