Liquid foams, as colloidal systems comprising a dispersed gas phase within continuous liquid medium, exhibit unique structural and rheological properties beneficial for various industrial environmental applications. This review synthesizes current knowledge on the fundamentals, stability mechanisms, practical applications of foams. We first discuss foam structures, transitioning from ball to wet dry influenced by fraction surfactant presence, which also influence foam's mechanical...

Rock wettability significantly influences underground oil extraction efficiency during enhanced recovery (EOR) processes. We experimentally examine the effect of on at pore-scale using microfluidics. Glass micromodels are used to mimic quartz surfaces hydrophilic porous rocks (such as sandstone), and their is altered chemically with a hydrophobic coating simulate oil-adsorbed surfaces. Comprehensive systematic investigations carried out, considering various crucial factors, namely crude...

This paper investigates the containment control problem of multiagent systems with double integrator dynamics under directed topologies. A model-based edge-event-triggered protocol is proposed, in which input to each agent only contains edge information and its own velocity information. Continuous detection avoided by establishment a predictive model controller updated at event time instants. The theoretical results show that, our protocol, can be solved Zeno behavior excluded. effectiveness...

Aerial recovery and redeployment can effectively increase the operating radius endurance of unmanned aerial vehicles (UAVs). However, challenge lies in effect aerodynamic force on system, existing road-based sea-based UAV methods are no longer applicable. Inspired by predatory behavior net-casting spiders, this study introduces a cable-driven parallel robot (CDPR) for recovery, which utilizes an end-effector camera to detect UAV’s flight trajectory, CDPR dynamically adjusts its spatial...

Machine Type Communication (MTC), which is also called as machine to communication over cellular mobile networks, has broad application prospects and market potential. However, due massive concurrent data control signaling transmitted by a lot of MTC user equipments (UEs), radio access network (RAN) congestion becomes an important issue. In this paper, we propose novel class-dependent back-off scheme for LTE system protect RAN from random channel (RACH) overload. Numerical results show that...

Carbon capture and storage in deep saline aquifers is a promising technology to mitigate anthropologically emitted CO 2 . Our high-pressure microfluidics can help assess the relevant time-scale mass transfer different reservoir conditions.

Surface wettability plays a crucial role in emulsion dynamics, fluid–fluid displacement, and various microfluidic applications. Using microfluidics, we elucidate the effect on oil recovery rock-structured porous network.

Abstract This article focuses on solving the leader‐follower formation tracking problem of multiple mobile robots under a hybrid‐triggered mechanism without leader's velocity measurements. Two kinds networks are considered: detection network, which enables relative detections by agents' onboard sensors, and communication is used to implement transmissions local information. The followers divided into two groups based their capacity By merely sensing information from leader, first group high...

Owing to the different consumption habits of people, market has rapidly changed, and customized demands have increased in recent years. This issue led need for manufacturing industry improve their production-process automation system control become faster more flexible. An intelligent automated production-line (IAPLCS) is proposed this study, which a graphic (GCS) designed integrate equipment communications production. runs complex packaged programs function blocks, enable users easily build...

This article revisits the sampled-data cooperative output regulation problem in a hybrid system framework. Due to inevitable network-induced imperfections caused by communication among agents, we consider under asynchronous transmissions and time-varying delays. A model is introduced incorporate aforementioned facilitate analysis on internal stability <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\mathcal...

An event-triggered affine formation maneuver control problem is studied in this work. The formations are invariant for any transformation. mechanism proposed the closed-loop system under which controller updates and information broadcasting generated only when it necessary to maintain behavior. practical convergence guaranteed Zeno behavior excluded. Simulations provided verify effectiveness of method.

With the deployment of small cells and device to communications in future heterogeneous networks, many situations we would encounter mobile radio channels with partly blocked line sight component, which are well modeled by Rician shadowed (RS) fading channel. In this paper, usage Kummer transformation, a simplified representation RS channel integral parameter is given. It finite series involving only exponential function low order polynomials. This allows engineers not closed-form...

An affine formation tracking problem of multiple mobile agents is studied in this work. Each agent the system modeled as an underactuated kinematic rigid body with nonholonomic constraints, maneuvering on special Euclidean group $(SE(3))$. A controller designed for each directly corresponding Lie algebra $SE(3)$. Moreover, only local information accessible to its body-fixed frame involved. The proposed control protocol can be implemented under both directed and undirected topologies. In...

Typical machine type communication (MTC) applications require the MTC devices to be located in enclosed spaces, such as cars or basement.These indoor would experience an additional 20 dB penetration loss on radio interface with respect normal LTE devices.To guarantee coverage of these devices, it is necessary differentiate them from and adopt dedicated compensation mechanisms.In this paper, we develop a unified differentiating algorithm suitable for any fading channels which are...

Nowadays, industrial developments in various countries around the world are all pursuing Industry 4.0. The primary goals to digitalize machining data manufacturing process, and import intelligence techniques. Most of small medium enterprises (SMEs) traditional industries facing problem generational transition. key operation maintenance skills often handled by senior employees difficult pass on. Therefore, many companies now more active try transformation digitalization automation. This study...

An adaptive arbitrary-order finite time differentiator is proposed in this paper. High-order derivatives can be estimated time. In order to deal with the difficulty providing suitable parameters, especially when of becomes very high, an mechanism adopted tune parameters a more efficient way. addition, taking advantage robustness sliding-mode method, presence external disturbance. Numerical simulation results are presented illustrate effectiveness method.

Satellite networks consisting of multiple orbits and tremendous satellites are the essential component future wireless communication. Laser inter-satellite links (LISLs) that can provide high capacity highly reliable communication bring implementation mega constellation (MCNs) into reality. Due to speed vibration satellite, success rate LISL establishment is difficult be fitted by traditional statistical methods. Aiming at problem probability, we build evaluation model based on acquisition...

This paper investigates an event-triggered approach for distributed optimization-based formation problems of multi-agent systems (MASs) under directed graphs. A algorithm is proposed such that agents can rendezvous around expected time-varying formation, and at the same time, optimize a global objective function. novel dynamic event-triggering mechanism proposed, where buffer variable introduced to store historical local information including average values measurement errors over one...