نتایج جستجو برای: accommodation lag
تعداد نتایج: 81236 فیلتر نتایج به سال:
The effect of the global financial crisis on the international trade patterns of developed countries has been one of the main focuses of recent studies. However, the dependence level of world trade on emerging markets increases every day. Therefore, it is important to study the level of the negative effect of the crisis on emerging economies and the level of their recovery potential. This paper...
The application of the Sliding Mode Thermal Control to dryer station furnace facility in agriculture productions is proposed. An adaptive controller is designed based on results obtained in the sphere of discontinuous system design. The derived Sliding Mode (SM) control algorithm written in Lab View environment should improve the control performance of the important characteristic of systems su...
This paper deals with the solution bounds for time-delay systems via delay-dependent Lyapunov– Krasovskiimethods. Solution bounds arewidely used for systemswith input saturation caused by actuator saturation or by the quantizers with saturation.We show that an additional bound for solutions is needed for the first time-interval, where t < τ(t), both in the continuous and in the discrete time. T...
A fast identification algorithm is proposed for systems with delayed inputs. It is based on a non-asymptotic distributional estimation technique initiated in the framework of systems without delay. Such technique leads to simple realization schemes, involving integrators, multipliers and piecewise polynomial or exponential time functions. Thus, it allows for a real time implementation. In order...
A new approach to robust sampled-data control is introduced. The system is modelled as a continuous-time one, where the control input has a piecewise-continuous delay. Sufficient linear matrix inequalities (LMIs) conditions for sampled-data state-feedback stabilization of such systems are derived via descriptor approach to time-delay systems. The only restriction on the sampling is that the dis...
PURPOSE Results in previous studies indicated that the lateral suprasylvian (LS) area, the cortical area surrounding the middle suprasylvian sulcus (Mss) of the cat, has important roles in the control of accommodation. The current study was conducted to investigate descending projections from the accommodation-related area in the LS area to the brainstem. METHODS Wheat germ agglutinin-horsera...
purpose: to determine the amplitude and facility of accommodation after photorefractive keratectomy (prk) in myopic subjects. methods: the study was performed on 160 eyes of 80 patients aged 19 to 72 years. amplitude and facility of accommodation was evaluated before and 2 weeks and one and three months after prk. amplitude of accommodation was evaluated by “minus lens” method and facility of a...
This paper examines saturated control of a general class of uncertain nonlinear systems with timedelayed actuation and additive bounded disturbances. The bound on the control is known a priori and can be adjusted by changing the feedback gains. A Lyapunov-based stability analysis utilizing Lyapunov–Krasovskii (LK) functionals is provided to prove uniformly ultimately bounded tracking despite un...
The Hankel operator of the system with single control input delay is established by using state-space formulation in this paper. In general, this type of operator is not a compact one. Singular values of this type of operator are studied. Two examples are used to illustrate the computation of Hankel singular value by the theoretical method proposed in this paper.
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