The boron nitride (BN) nanoparticles, as the structural analogues of graphene, are potential biomedicine materials because excellent biocompatibility, but their solubility and biosafety biggest obstacle for clinic application. Here, we first synthesized highly soluble BN nanoparticles coated by PEG (BN-PEG) with smaller size (~10 nm), then studied biodistribution in vivo through radioisotope (Tc99mO4 −) labeling, results showed that BN-PEG mainly accumulated liver, lung, spleen less uptake...

The paper discusses consensus problems of heterogeneous multi-agent systems with saturation constraints, which is made up agents having the first- and second-order integrators. Based on distributed adaptive parameters design approaches, several algorithms saturations for are given under fixed topology. Moreover, corresponding communication protocols designed switching cases. Furthermore, centralised event-triggered conditions introduced to reduce energy consumption agents, respectively. By...

This paper investigates containment control problem for multi-agent systems with input saturation. Firstly, algorithms are designed the first-order and second-order cases In this framework, some sufficient conditions existence of such proposed, which guarantees that position states followers converge to convex hull formed by leaders. Secondly, obtained results further extended high-order case. Finally, simulation examples given illustrate effectiveness our proposed method.

Air-vented ion chambers are generally used in radiation therapy dosimetry to determine the absorbed dose with superior precision. However, chamber detector arrays, number of array elements and their spacing do not provide sufficient spatial sampling, which can be overcome by interpolating measured data. Herein, we investigated potential principle linear interpolation algorithm volumetric reconstruction based on computed tomography images modulated arc (VMAT) technique evaluated how...

This article presents the inverse of kernel operator associated with complete quadratic Lyapunov-Krasovskii functional for coupled differential-functional equations when is separable. Similar to case time-delay systems retarded type, instrumental in control synthesis. Unlike power series expansion approach used previous literature, a direct algebraic method here. It shown that domain definition infinitesimal generator an invariant subspace if it operator. The process synthesis using...

Abstract This article investigates the robust optimal output regulation problem for constrained uncertain nonlinear systems. A two‐step design framework is proposed to overcome difficulties brought by uncertainties, constraint and performance optimization. First, feedforward controller designed internal model principle, transformed into stabilization problem. Then, control with input saturation further considered in feedback process. With help of a non‐quadratic cost functional, actor‐critic...

The classification of land cover types is an important task for monitoring use. Moreover, with the continuous application high resolution remote sensing images, time and space span becoming larger larger, which greatly increases difficulty target types. And there are few results that can effectively deal deep category information. Furthermore, extraction fusion features still need to be improved. In this paper, a multi-angle attention network (MAFNet) proposed uses 50-layer residual as...

This article presents the inverse of kernel operator associated with complete quadratic Lyapunov-Krasovskii functional for coupled differential-functional equations when is separable. Similar to case time-delay systems retarded type, instrumental in control synthesis. Unlike power series expansion approach used previous literature, a direct algebraic method here. It shown that domain definition infinitesimal generator an invariant subspace if it operator. The process synthesis using...

The paper investigates H ∞ consensus problem of heterogeneous multi-agent systems including agents with first- and second-order integrators in the presence disturbance communication time delays under Markov switching topologies. Based on current messages, outdated information stored memory delay from neighbors, a more general kind distributed algorithm is proposed, which faster convergence. By applying stochastic stability analysis, model transformation techniques graph theory, sufficient...

Abstract This paper investigates disturbance-resistant intermittent event-triggered optimal formation control problems of second-order multi-agent systems by using reinforcement learning method, which takes into account the influence network damage including denial-of-service (DoS) and deception attacks, stochastic noises, unknown external disturbances. Firstly, we propose a novel disturbance observer based on adaptive to estimate disturbances under an mechanism. Secondly, use estimation...

In this paper, an active fault tolerant control (FTC) scheme is suggested for the time delayed singularly perturbed systems (SPS). The considered sensor only affected at systems' steady state. SPS are decomposed into slow subsystem (SS) and fast (FS) firstly. Then controller SS consists of a feedback additive term proposed, which can compensate fault. states estimation be realized by Luenberger observer. gain FS derived classic pole placement method Sufficient conditions ensuring law...

This paper investigates the group consensus problem of multi-agent systems under pinning control scheme. The network topology is assumed to be directed. Some novel criteria are proposed guarantee that agents asymptotically follow virtual leader in same group, but no appears among different groups. Combining matrix transform technique, method and adaptive scheme used, which helpful obtain effective protocols. Numerical example also provided demonstrate effectiveness theoretical analysis.

In this paper, the analysis of quantized effect on robust distributed consensus linear uncertain multi-agent systems(MASs) via sliding-mode control(SMC) is investigated. Two kinds phenomena input quantization, including quantization mismatch and measurement saturation, are analyzed. It shows that MASs SMC strategy might not be well achieved when two ignored in control design. Several research ideas for feedback finally discussed.

This paper deals with the problem of quantized feedback control for a class nonlinear systems subject to time-varying delay. The nonlinearity is assumed satisfy local Lipschitz condition, and system delay supposed be but bounded. Simultaneously, maximum admissible constant through convex optimization obtained. purpose design controller such that resulting closed-loop asymptotically stable. Delay-dependent conditions existence desired are obtained by using partitioning technique. A numerical...

The paper investigates adaptive consensus problems for continuous-time second-order multi-agent systems under undirected topologies. When gains in the protocols are disturbed by stochastic noises, sufficient conditions mean square of given. By graph theory and Lyapunov function, static based on nodes designed, which is different from existing literatures. Finally, simulation examples provided to illustrate effectiveness our proposed methods paper.

This paper investigates the problem of H <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">∞</inf> performance for time delayed singularly perturbed systems within finite frequencies (FF) range. Firstly, with certain conditions, time-delayed are divided into two subsystems, then via partitioning technique and generalized KYP lemma, sufficient conditions which make degraded subsystems (the slow subsystem fast subsystem) satisfy could be derived in...