9137628
Robust Synchronization of an Array of Coupled Stochastic Discrete-Time Delayed Neural Networks
This paper is concerned with the robust synchronization problem for an array of coupled stochastic discrete-time neural networks with time-varying delay. The individual neural network is subject to parameter uncertainty, stochastic disturbance, and time-varying delay, where the norm-bounded parameter uncertainties exist in both the state and weight matrices, the stochastic disturbance is in the form of a scalar Wiener process, and the time delay enters into the activation function. For the array of coupled neural networks, the constant coupling and delayed coupling are simultaneously considered. We aim to establish easy-to-verify conditions under which the addressed neural networks are synchronized. By using the Kronecker product as an effective tool, a linear matrix inequality (LMI) approach is developed to derive several sufficient criteria ensuring the coupled delayed neural networks to be globally, robustly, exponentially synchronized in the mean square. The LMI-based conditions obtained are dependent not only on the lower bound but also on the upper bound of the time-varying delay, and can be solved efficiently via the Matlab LMI Toolbox. Two numerical examples are given to demonstrate the usefulness of the proposed synchronization scheme.
11574317
Guest Editorial Foreword to the Special Issue on Intelligent Computation for Bioinformatics
The six papers in this special section are devoted to intelligent computation and bioinformatics.
18058927
Global Asymptotic Stability of Delayed Cellular Neural Networks
A new criterion for the global asymptotic stability of the equilibrium point of cellular neural networks with multiple time delays is presented. The obtained result possesses the structure of a linear matrix inequality and can be solved efficiently using the recently developed interior-point algorithm. A numerical example is used to show the effectiveness of the obtained result
9635460
Energy efficiency of two virtual infrastructures for MANETs
In a mobile ad hoc network (MANET), virtual infrastructures are helpful to network operations. There are two popular virtual infrastructures for MANETs, square-based and hexagon-based. The square-based infrastructure divides the network area into squares of the same kind, and forwarding is done from one square to four neighboring squares. The hexagon-based divides the area into hexagons and forwarding is six-directional. These two virtual infrastructures can be used to aid routing and to save energy. However, no performance analysis or comparison has been made between them. This paper compares energy efficiency of these two virtual infrastructures analytically and numerically. Theoretical analysis shows, with the same transmission range, the six-direction forwarding covers 40% more area than the four-direction forwarding does in a single hop, and in 95% of the cases, the six-direction forwarding has a shorter path, therefore less energy consumption. The simulation results support the analysis.
7996448
Micromachined Polycrystalline Sige-Based Thermopiles for Micropower Generation on Human Body
This paper presents a polycrystalline silicon germanium (poly-SiGe) thermopile specially designed for thermoelectric generators used on human body. Both the design of the single thermocouple and the arrangement of the thermocouple array have been described. A rim structure has been introduced in order to increase the temperature difference across the thermocouple junctions. The modeling of the thermocouple and the thermopile has been performed analytically and numerically. An output power of about 1 µW at an output voltage of more than 1 V is expected from the current design of thermopiles in a watch-size generator. The key material properties of the poly-SiGe have been measured. The thermopile has been fabricated and tested. Experimental results clearly demonstrate the advantage of the rim structure in increasing output voltage. In presence of forced convection, the output voltage of a non-released thermopile can increase from about 53 mV/K/cm2 to about 130 mV/K/cm2 after the rim structure is formed. A larger output voltage from the thermopile is expected upon process completion.
9878186
The Biomolecular Interaction Network Database and related tools 2005 update
The Biomolecular Interaction Network Database (BIND) (http://bind.ca) archives biomolecular interaction, reaction, complex and pathway information. Our aim is to curate the details about molecular interactions that arise from published experimental research and to provide this information, as well as tools to enable data analysis, freely to researchers worldwide. BIND data are curated into a comprehensive machine-readable archive of computable information and provides users with methods to discover interactions and molecular mechanisms. BIND has worked to develop new methods for visualization that amplify the underlying annotation of genes and proteins to facilitate the study of molecular interaction networks. BIND has maintained an open database policy since its inception in 1999. Data growth has proceeded at a tremendous rate, approaching over 100 000 records. New services provided include a new BIND Query and Submission interface, a Standard Object Access Protocol service and the Small Molecule Interaction Database (http://smid.blueprint.org) that allows users to determine probable small molecule binding sites of new sequences and examine conserved binding residues.
122345530
Dynamics of Controlled Mechanical Systems with Delayed Feedback
1 Modeling of Delayed Dynamic Systems.- 2 Fundamentals of Delay Differential Equations.- 3 Stability Analysis of Linear Delay Systems.- 4 Robust Stability of Linear Delay Systems.- 5 Effects of a Short Time Delay on System Dynamics.- 6 Dimensional Reduction of Nonlinear Delay Systems.- 7 Periodic Motions of Nonlinear Delay Systems.- 8 Delayed Control of Dynamic Systems.- References.