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We present a new technique for designing low-profile, ultrawideband, true-time-delay (TTD) equivalent microwave lenses. Such a lens is composed of numerous spatial time-delay units (TDUs) distributed over a planar surface. Each spatial TDU is the unit cell of an appropriately designed miniaturized-element frequency selective surface and provides a frequency-independent time delay within the frequency...
A dynamic channel allocation scheme is proposed in this paper, which is applied to integrated voice/data services in TD-SCDMA mobile communication system. The scheme provides the reserved channel for handoff calls to increase the rate of successful accession. Meanwhile, the new call queuing strategy is adopted to limit the deterioration of the new call blocking probability caused by the reservation...
This paper deals with the network control of two-stage dissolution tank systems. A class of sampled-data control of time delay systems with actuator saturations is modeled. We transformed non-linearities of actuator saturations in the systems into a convex polytope of linear system, and the sampled-data control problems are solved by input delay approach. Then, using the Lyapunov-Krasovskii stability...
Pulse vaccination is an important strategy which can eliminate epidemic. Nowadays studied focus on the latent and immunity period of epidemic, which can reflected by the epidemic model with the time-delay system. Using this principle of pulsed optimization to analyse SEIR epidemic model with latent period. It can achieve the target of controlling infectious disease via optimization the number and...
Ad Hoc networks is recently a hot spot in wireless network researching domain. The design of routing algorithm, which is as the core layer technology in Ad Hoc networks, has drawn great concern. In response to the drawbacks of traditional routing protocols such as bad convergence and providing no QoS guarantee, this paper gives the way to construct node vector function to represent QoS indices in...
This paper presents a promising application of Vehicle-Infrastructure Integration, in which arterial travel time are estimated in real-time. In this application, information collected through the V-I communication is utilized in concert with that collected by conventional point-based detectors. Two VII probe data (VPD) models have been developed and customized for the latest VII probe message standard...
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