The inferred density of Enceladus' core, together with evidence hydrothermal activity within the moon, suggests that core is porous. Tidal dissipation in an unconsolidated has been proposed as main source geological activity. However, tidal response its generally modeled assuming it behaves viscoelastically rather than poroviscoelastically. In this work, we analyze poroviscoelastic to better constrain distribution Enceladus. A body a different viscoelastic one; pressure pores alters stress...

Abstract Improved constraints on the mechanical behavior of magma chambers is essential for understanding volcanic processes; however, role crystal mush evolution has not yet been systematically studied. Existing chamber models typically consider to be isolated melt bodies surrounded by elastic crust. In this study, we develop a physical model account presence and properties in investigate its impact processes during after injection new magma. Our assumes spherical body consisting liquid...

Abstract Improved understanding of the impact crystal mush rheology on response magma chambers to magmatic events is critical for better crustal igneous systems with abundant crystals. In this study, we extend an earlier model by Liao et al. (2018); https://doi.org/10.1029/2018jb015985 which considers mechanical a chamber poroelastic mush, including poroviscoelastic mush. We find that coexistence two mechanisms diffusion and viscoelastic relaxation causes react injection event more complex...

Abstract Using filter-space techniques (FSTs), we study the spatial structure of scale-to-scale flux energy in two-dimensional flow. Analysing data from a weakly turbulent, experimental quasi-two-dimensional flow, find rotationally symmetric patterns consisting lobes spectral alternating sign that are associated with vortical motion flow field. Such also occur simple analytical model, even though single-scale model should have no transfer. Thus, interpretation these must be handled care. By...

Abstract Saturn's moon Enceladus has a global subsurface ocean and porous rocky core in which water‐rock reactions likely occur; it is thus regarded as potentially habitable environment. For icy moons like Enceladus, tidal heating considered to be the main mechanism, generally been modeled using viscoelastic solid rheologies existing studies. Here we provide new framework for calculating based on poroviscoelastic model interstitial fluid deformation are coupled. We show that total rate...

In this article, a modified state-based peridynamic (PD) method is proposed to solve transient heat conduction problems in functionally gradient materials (FGMs) with extending insulated cracks. The PD formulation of has been derived by using the time integration through forward difference technique. Numerical simulations have performed verify accuracy and effectiveness method. analytical solution finite element results are used for comparison. work, material properties graded assumed vary...

Using filter-space techniques, we analyze the transport of energy and enstrophy between scales in an experimental quasi-two-dimensional weakly turbulent flow. By decomposing scale-to-scale fluxes into three components that consist distinct types triad interactions, find different triads are responsible for forward inverse flux. To understand this behavior, geometric alignment stresses drive transfer large-scale velocity vorticity gradients, show interactions have signatures. Our results shed...

Using high-resolution particle tracking velocimetry, we study the effects of forcing geometry on statistics an electromagnetically stirred thin-layer flow. We consider two arrangements: one that produces a lattice vortices as base flow, and array shear bands. find vortex flow drives stronger fluctuating kinetic energy while shear-band leads to more intense velocity gradients. explain our results by considering spectral in system. Our have implications for design two-dimensional experiments.

Based on niche theory, this paper constructs an evaluation index system for regional innovation ecosystem suitability from four aspects: benefits, technology, culture, and policy. The model is used to calculate compare the evolutionary momentum of ecosystems in nine prefecture-level cities Hubei Province 2017 2022. Using grey prediction GM (1,1), development over next five years predicted. results showed that, perspective niche, overall niches relatively low, with higher momentum, two...

Using filter-space techniques, we study the spatial structure of turbulent stress that couples motion on different length scales in a quasi-two-dimensional laboratory flow. As scale increases, observe appearance long-range, system-spanning order this stress, even though flow field remains disordered. Suggestively, ordering occurs only range over which find net inverse energy transfer to larger scales. However, built from wave vectors with random phases also displays ordering, suggesting at...

SUMMARY The 2011–2012 eruption at Cordón Caulle in Chile produced crystal-poor rhyolitic magma with crystal-rich mafic enclaves whose interstitial glass is of identical composition to the host rhyolite. Eruptible rhyolites are thought be genetically associated mushes, and within rhyolite support existence a mush from which erupted was derived. Moreover, towards end eruption, subsidence gave way inflation that has on average been continuous through least 2020. We hypothesize segregation...

Abstract Gravity, magnetic, and bathymetry data collected along a continuous 1,400‐km‐long spreading‐parallel flow line across the Mid‐Atlantic Ridge indicate significant tectonic magmatic fluctuations in formation of oceanic crust over range time scales. The transect spans from 28 Ma on African Plate to 74 North American plate, crossing at 35.8°N. Gravity‐derived crustal thicknesses vary 3–9 km with standard deviation 1.0 km. Spectral analysis residual mantle Bouguer anomaly show diffuse...

Lagrangian coherent structures (LCSs) are the dominant transport barriers in unsteady, aperiodic flows, and their role organizing mixing has been well documented. However, nearly all that is known about LCSs gleaned from passive observations: they computed a post-processing step after flow observed used to understand why proceeded as it did. In many applications, ability instead control presence or location of via imposed forcing would be valuable. With this goal mind, we study relationship...

Concrete with a compressive strength of 100MPa was produced metakaolin(MK), and the effect MK replacement levels on concrete water to binder ratio 0.25 studied in this paper. XRD, microhardness tests, SEM MIP were used investigate influences phase composition, interfacial transition zone(ITZ), microstructural morphology pore structure high-strength (HSC). The results showed that incorporation promoted hydration process decreased amount Ca(OH)2 crystals. Furthermore, increased ITZ HSC,...

Modeling of heat and electrical current flow simultaneously in thermoelectric convertor using classical theories do not consider the influence defects material. This is because traditional methods are developed based on partial differential equations (PDEs) lead to infinite fluxes at discontinuities. The usual way solving such PDEs by numerical technique, like Finite Element Method (FEM). Although FEM robust versatile, it suitable model evolving To avoid shortcomings, we propose concept...

Abstract To meet the challenges from an unconsolidated, deep sea sandstone reservoir, this paper developed a stimulation and sand control method through fiber fracturing. The key points of technology are as follow: (1) This instantizing guar gel fracturing fluid system based on seawater, which can be online mixed with in-situ seawater. Transport fresh water will not required for new system, application save platform space. (2) design was optimized orthogonal analysis to improve effect. (3)...

Using high-resolution particle tracking velocimetry and filter-space techniques, we study the links between scale-to-scale transfer of energy enstrophy instantaneously rotational straining regions as determined by classic Okubo-Weiss parameter in a quasi-two-dimensional laboratory flow. Although has shortcomings, find that, when suitably conditioned, it is surprisingly good predictor for future evolution spectral fluxes. By studying Lagrangian correlation functions, explain our findings...

Abstract Crustal magmatic systems likely consist of reservoirs dominated by crystal mush. Recent studies suggest that the physical processes occurring in mush could alter response during volcanic unrest. Here, we present a magma chamber deformation model incorporates two new aspects mush: heat and exsolved gas. The is based on earlier Liao et al. (2021, https://doi.org/10.1029/2020JB019395 ) with additional including thermal‐mechanical coupling, dependence material properties gas content,...

Abstract Jangal contains the rich literary value and aesthetic value, which has important research significance. Through application of deep learning technology in graphic semantic analysis, this paper specifically describes extraction method features children’s picture books “Jianggeer”. Then, BERT framework is used as basis to construct analysis model JCDB-BRET paper, it applied actual semantics “Jianggeer” after training. In recognize all images book branch out their be expressed,...