Abstract How groups of cooperative foragers can achieve efficient and robust collective foraging is interest both to biologists studying social insects engineers designing swarm robotics systems. Of particular are distance-quality trade-offs swarm-size-dependent strategies. Here, we present a system based on virtual pheromones, tested in simulation swarms up 200 physical robots. Our individual agent controllers highly simplified, as they binary pheromone sensors. Despite being simple, our...

An advection-diffusion solver was applied to assess how stent strut shape and position impact the development of a pro-thrombotic region within stented human artery. Presented here is suitably parameterised equation with source term that spatially uniform certain sub-domain interest compute “time concentration”. The latter will serve as surrogate quantity for “age” fluid parcels, i.e., time parcel has spent in sub-domain. This particularly useful concept context coronary artery...

A bstract Dynamical system models typically involve numerous input parameters whose “effects” and orthogonality need to be quantified through sensitivity analysis, identify inputs contributing the greatest uncertainty. Whilst prior art has compared total-order estimators’ role in recovering “true” effects, assessing their ability recover robust parameter for use identifiability metrics not been investigated. In this paper, we perform: (i) an assessment using a different class of numerical...

This paper presents an analysis of the energy consumption a continuous flow ohmic heater (CFOH) with advanced process controls for heating operations in food and drinks industry. The study was carried out by using operational data collected from CFOH pilot plant that designed constructed at National Centre Excellence Food Engineering (NCEFE), Sheffield Hallam University. is controlled PC includes onboard Programmable Logic Controller (PLC) Human Machine Interface (HMI) so it can be operated...

The enhancement of vehicle passenger safety is a central theme for car manufacturers. Since the introduction Electronic Stability Control (ESC) in late 90s, researchers industry and academia have kept striving continuously enhancing safety. However, despite significant efforts, literature shows that number these endeavors not advanced beyond theoretical formulations software simulations. This paper presents testing journey an individual-wheel-torque-based stability controller through major...

Ohmic heating is a highly efficient method for rapid fluid heating, with applications in fields such as food processing, pharmaceuticals, and chemical engineering. Prior to its industrial application, thorough analysis modeling are crucial ensure safe operations. Therefore, this research focuses on the development validation of transfer function-based model continuous flow ohmic heater (CFOH). Validation metrics include root mean square error (RMSE) absolute percentage (MAPE). The developed...

An extended Benzi-Dellar lattice Boltzmann equation scheme [R. Benzi, S. Succi, and M. Vergassola, Europhys. Lett. 13, 727 (1990)EULEEJ0295-507510.1209/0295-5075/13/8/010; R. Phys. Rep. 222, 145 (1992)PRPLCM0370-157310.1016/0370-1573(92)90090-M; P. J. Dellar, Rev. E 65, 036309 (2002)1063-651X10.1103/PhysRevE.65.036309] is developed applied to the problem of confirming, at low Re drop fluid concentration, c, variation effective shear viscosity, η_{eff}=η_{1}[1+f(η_{1},η_{2})c], with respect c...

We present a challenging validation of phase field multicomponent lattice Boltzmann equation (MCLBE) simulation against the Re=0 Stokes flow regime Taylor-Einstein theory dilute suspension viscosity. By applying number recent advances in understanding and elimination interfacial microcurrent artefact, extending to three-dimensional class stability-enhancing multiple relaxation time collision models (which require no explicit matrix, note) developing new interpolation schemes, we are able...

The utility of an enhanced chromodynamic, color gradient or phase-field multicomponent lattice Boltzmann (MCLB) equation for immiscible fluids with a density difference was demonstrated by Wen et al. [Phys. Rev. E 100, 023301 (2019)] and Ba 94, 023310 (2016)], who advanced earlier work Liu 85, 046309 (2012)] removing certain error terms in the momentum equations. But while these models' collision scheme has been carefully degrees, there is, currently, no quantitative consideration...

In this paper, we show that the mathematical classification of one-dimensional cellular automata given by Dubois–Violette and Rouet [1987] does not truly represent different behaviors possible. fact many rules their type O have totally behavior. A better is based on Smale's basic sets nonwandering points.

When a fracturing vehicle is working, it generally needs to bear high loads, media corrosion and erosion. For this special working environment, study proposes rolling bearing fault diagnosis method based on stack marginalised sparse denoising auto-encoder (SDAE). This combines the (SAE) (DAE) characteristics of dimensionality reduction robustness. The adds marginalisation optimise SDAE. Finally, uses two-layer stacking method. output results second SDAE are used as input softmax classifier...

We develop a three-dimensional immersed boundary chromodynamic multicomponent lattice Boltzmann method capable of simulating vesicles, such as erythrocytes. The presented is encapsulated in single framework, where the application force automatically adaptive interfacial region results correct vesicle behavior. also set down methodology for computing principal curvatures surface three-dimensional, physical space which defined solely terms its normal vectors. benefits model are transparent...

Communication between human operators and robots is important. In this paper, two problems are addressed: (1) how a robot can change its behavior sequences in manipulation tasks with intervention; (2) operator transfer information to efficiently. We tackle the first problem by proposing framework based on finite state machine model action tasks. The shows way which slides level of autonomy considering result transition input operator. be easily extended include higher autonomy. To second...

It is well-known that binary-valued cellular automata, which are defined by simple local rules, have the amazing feature of generating very complex patterns and having complicated dynamical behaviors. In this paper, we present a new type automaton based on real-valued states produce an even greater amount interesting structures such as fractal, chaotic hypercyclic. We also give proofs to systems fixed points periodic solutions.

We develop, after Dellar [Phys. Rev. E. 65, 036309 (2002); J. Comput. Phys. 190, 351 (2003)], a multiple-relaxation-time (MRT), chromodynamic, multicomponent lattice Boltzmann equation (MCLBE) scheme for simulation of isothermal, immiscible fluid flow with density contrast. It is based on Lishchuk's method [Brackbill, Kothe, and Zemach, Comp. 100, 335 (1992); Lishchuk, Care, Halliday, 67, 036701, (2003)] the segregation d'Ortona et al. 51, 3718, (1995)]. focus fundamental model verifiability...

Abstract We validate the chromo-dynamic multi-component lattice Boltzmann equation (MCLBE) simulation for immiscible fluids with a density contrast against analytical results complex flow geometries, particular emphasis on fundamentals of method, i.e. compliance inter-facial boundary conditions continuum hydrodynamics. To achieve necessary regimes chosen validations, we develop, from three-dimensional, axially-symmetric formulation, novel, two-dimensional, pseudo Cartesian, MCLBE scheme....

Improving vehicle passenger safety is of major importance in modern automotive industry. Within this framework, stability controllers play a key role, as they actively contribute to maintain driveability even potentially dangerous situations. An example such controller Electronic Stability Control (ESC), that brakes individual wheels generate direct yaw moment stabilize the (e.g. from excessive understeer or oversteer). This paper presents real-time implementation based on measured (and/or...

Dynamical system models typically involve numerous input parameters whose “effects” and orthogonality need to be quantified through sensitivity analysis, identify inputs contributing the greatest uncertainty. Whilst prior art has compared total-order estimators’ role in recovering “true” effects, assessing their ability recover robust parameter for use identifiability metrics not been investigated. In this paper, we perform: (i) an assessment using a different class of numerical representing...

Improving the accuracy of large measurement systems consisting multiple laser trackers and Enhanced Reference System (ERS) points is technically challenging. In practice, standard devices with precise distance limits are often used to improve registration trackers. However, these expensive need be calibrated by Coordinate Measuring Machine (CMM). addition, stability ERS can significantly affect errors. Therefore, this paper proposes a tracker method based on point-weighted self-calibration...