In this article, we investigate the distributed cooperative optimization problem for heterogeneous uncertain high-order nonlinear multi-agent systems with an intermittent communication network, where each agent can only share information its neighbors in some disjoint time intervals. To address problem, design process consists of constructing a algorithm and designing decentralized tracking controller. algorithm, virtual signals are constructed all agents to minimize cost function under...

This article addresses the exponential almost sure (EAS) stability and stabilization problems of continuous-time Markovian jump systems with additional stochastic switches. Sufficient conditions for EAS are established by applying a method to its transfer matrix. Particularly, both sojourn time distribution such random switchings considered in design state-feedback controller. Compared some existing references, proposed controller could bear unmatched or asynchronous signals. Moreover, it...

This brief focuses on the distributed resource allocation problem (RAP) for a general linear heterogeneous multi-agent system (MAS), in which each agent adopts different structure parameters. By means of consensus approach and symbolic-function-based fixed-time control theory, an initialization-free algorithm is designed. Moreover, equality constraint solved based proportional-integral (PI) idea output all agents tracks to optimal solution within fixed-time. Finally, we reveal effectiveness...

The elastic supported block track system, the so-called "low vibration track", is one of vital structural types modern ballastless tracks that retains multilayered design like slab-type track. Although concrete blocks and rubber pads between rail trackbed absorb energy from railway traffic, blindly reducing interlayer stiffness structure not conducive to long-term stability structure, especially in excessive displacement which will lead wheel load loss increase risk instability wheel-rail...

Abstract With the rapid development of heavy haul railway transportation technology, tunnel foundation defects and their effects on structural performance have attracted wide attention. This paper systematically investigates evolution mechanism in tunnels impact stiffness degradation through experiments numerical simulations. A train–ballasted track–tunnel basement–surround rock dynamic interaction model (TTTR model) is constructed. Firstly, study reveals four-stage process initial basement...

Extensive human exposure to perfluoroalkyl compounds (PFAA) together with their persistence and various toxicities have arisen increasing concern. A noninvasive method would improve assessment for large population, especially the children susceptible contaminants. The aim of study was assess use PFAA measurements in nails as a biomarker PFAAs. Fingernail, toenail, blood samples were collected from 28 volunteers. concentrations determined by high performance liquid chromatography-tandem mass...

A kinetic model of vanadium extraction from the metal bath has been established for describing oxidation behavior different elements including [V], [Ti], [Si], [Cr], [Mn], and [C] in based on a 70 t practical vanadium‐extraction converter. The results show that calculated values using models are good agreement with measured values. calculation also silicon titanium is rapid at initial stage blowing (0–1.5 min), ends after 2 min. intensive happens intermediate stages (1.5–4.5 content...

This article considers the semiglobal cooperative suboptimal output regulation problem of heterogeneous multi-agent systems with unknown agent dynamics in presence input saturation. To solve problem, we develop distributed control strategies from two perspectives, namely, model-based and data-driven. For case, design a strategy by using low-gain technique theory. Moreover, when agents' are unknown, data-driven algorithm to problem. We show that proposed ensure each agent's gradually follows...

This article considers distributed nonconvex optimization for minimizing the sum of local cost functions by using information exchange. In order to avoid continuous communication among agents and reduce overheads, we develop a algorithm with dynamic exponentially decaying event-triggered scheme. We show that proposed is free Zeno behavior (i.e., finite number triggers in any time interval) contradiction asymptotically converges stationary point if are smooth. Moreover, global optimal if,...

The phase diagrams of FeO–SiO 2 –V O 3 systems as the main components vanadium slag are assessed on basis existing literature models and experimental studies to modify partial parameters by FactSage thermodynamic software. results show that eutectic peritectic reactions for FeO–V system happen at about 1626 1985 K, respectively. monotectic V –SiO 1935 1963 According actual blowing temperature vanadium‐extraction converter, isothermal section 1573, 1623, 1672 K ternary is calculated, 1573...

Summary This article focuses on the stability and stabilization problems of singularly perturbed jump systems. Here, parameter (SPP) is also with Markov switching satisfies any positive bound predefined. First, conditions expressed ϵ i ‐free but involving its are developed by constructing an ‐dependent Lyapunov function. Then, a method for state feedback controller depending SPP proposed, whose given in terms linear matrix inequalities. Moreover, some special cases about deterministic...

This study focuses on the guaranteed control problem of continuous‐time Markovian jump systems. Different from traditionally controllers, a kind failure‐tolerant controller is proposed. Particularly, dwell times suffering failures or not are constants. A Lyapunov function approach used to analyse its stability, which could lead convex conditions depending such times. Because these being LMIs, they be tested and compute gains easily. Two examples demonstrate effectiveness superiority proposed methods.

It is of great significance to achieve resource recycling while eliminating SO2 and NOx pollutants. Herein, the desulfurization denitrification technology using phosphorus sludge phosphate rock as absorbents has been attracting significant attention recently, owing its low cost pollution-free utilization. This paper timely reviews removal performance, absorption mechanism, reaction products this technology, analyzes dry wet characteristics rock, emphasizes key process NO oxidation through...