Substantial improvement in accuracy of identified linear time-invariant single-input multi-output (SIMO) dynamical models is possible when the disturbances affecting the output measurements are spatially correlated. Using an orthogonal representation for the modules composing the SIMO structure, in this paper we show that the variance of a parameter estimate of a module is dependent on the mode...

the present sought to draw a comparison between model predictive control performance and two other controllers named simple pi and selective pi in controlling large-scale natural gas transport networks. a nonlinear dynamic model of representative gas pipeline was derived from pipeline governing rules and simulated in simulink® environment of matlab®. control schemes were designed to provide a s...

A. Introduction: General Concepts of Disturbance Disturbance has been defined as "any relatively discrete event that disrupts ecosystem, community, or population structure and changes resources, substrate availability, or the physical environment" (P ickett and W hite 1985). The size, intensity, frequency, and timing of a d isturbance all influence ecosystem structure and function. Generally, n...

This paper presents a precision fault reconstruction scheme for a class of nonlinear systems involving unknown input disturbances. First, using the coordinate transformation algorithm, the disturbances and faults of the system are fully decoupled. Therefore, it is possible to eliminate the influence of disturbances to the system, namely, better disturbances robustness. On this basis, the design...

This study attempts to reveal the effect of family structure on social participation of  Payame Noor university students, it consists of 339 students. The theoretical framework of this investigation is based on two hypotheses. Hegen personality structure theory and Parsons action theory.  One hypotheses is on satisfactoriness in the family structure were based on personality structure theory an...

This paper investigates the robust ∞ H control problem for a class of uncertain switched delay systems that involve parameter uncertainties and unknown nonlinear disturbances. Based on the multiple Lyapunov functions method, a sufficient condition for the solvability of the robust ∞ H control problem is derived by employing a hysteresis switching law and variable structure controllers. When the...

introduction: sleep disorders can influence either directly or indirectly, on the family, colleagues and finally the community. in the realm of children, the most serious complications of sleep is anxiety and behavioral problems that make them prone to academic failure, family tensions and psychosocial – social trauma. concerning the significance, outbreak of sleep disorders and its complicatio...

sleep disturbance, known as insomnia, is a common symptom of many mental illnesses. insomnia is one of the most prevalent sleep disorders characterized by sleep difficulty that affects our life and work safety. several lines of evidence support the primary insomnia as a risk factor/predictor for depression and anxiety disturbances. anxiety disorders and insomnia are common, debilitating and hig...

Wave-like substorm arc features in the aurora and Pi2 magnetic disturbances observed in the near-Earth plasma sheet are frequently, and sometimes simultaneously, observed around the substorm onset time. We perform statistical analyses of the THEMIS ASI auroral observations that show wave-like bright spot structure along the arc prior to substorm onset. The azimuthal mode number values of the wa...