Tin sulfide(SnS_(2))anodes have garnered significant attention within emerging energy storage ***,the application of SnS_(2)is curtailed due to its inherent limitations,including poor cyclic stability and inevitable v...
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Tin sulfide(SnS_(2))anodes have garnered significant attention within emerging energy storage ***,the application of SnS_(2)is curtailed due to its inherent limitations,including poor cyclic stability and inevitable volumetric expansion upon *** study reports the successful fabrication of an innovative SnS_(2)-based composite,featuring an eggshell-like structured nitrogen-doped carbon coating,referred to as SnS_(2)@*** novel architecture,wherein SnS_(2)acts as the core encapsulated by a nitrogen-doped carbon shell,characterized by a void space between the shell and core,is crucial in mitigating volumetric *** configuration contributes to maintaining the structural integrity of the composite materials,even under the stresses of continuous *** within the carbon matrix enhances conductivity and promotes the formation of a more robust and stable solid electrolyte interphase(SEI)*** investigations have substantiated the electrochemical superiority of the SnS_(2)@NxC electrode,demonstrating a specific capacity of 701.8 mA·h·g^(-1)after 1000 cycles at 0.5 A·g^(-1)and maintaining a capacity of 597.2mA·h·g^(-1)after 400 cycles at a heightened current density of 2 A·g^(-1).These findings underscore the exceptional cyclic performance and durability of the SnS_(2)@NxC electrode.
To improve the tribocorrosion resistance of oil drill pipes used in deep-sea drilling,a Ti-based composite coating was successfully fabricated by laser direct energy deposition technology on the TC4 titanium alloy ***...
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To improve the tribocorrosion resistance of oil drill pipes used in deep-sea drilling,a Ti-based composite coating was successfully fabricated by laser direct energy deposition technology on the TC4 titanium alloy *** microstructure analysis showed that a new heterogeneous structure of multistage strength-ening phases(micron-sized TiN phases and nano-sized TiB phases)distributed on theβmatrix(soft Cu-rich phases and hard Mo-rich phases)was formed,and the size ofβgrain was refined to 2μm with the content of Cu higher than 12 wt.%.The microhardness of the composite coating was increased to more than 700 HV_(0.2)due to the solution strengthening of Mo elements and the formation of hard TiN *** the same time,the fracture toughness of 12Cu composite coating was significantly increased to 8.37 MPa m^(1/2),which was attributed to the combined effect of grain refining,high-density dislocations in Cu-rich phases,and nanoscale TiB *** synergistic enhancement of hardness and toughness of 12Cu composite coating promoted the generation of titano-molybdenum-copper composite oxide film on the worn surface,and the tribocorrosion resistance increased more than 7 times compared with TC4.
This paper proposes an explicit scheme to analyze the failure of a subsea polyhedral tunnel-liner system with an inverted arch under mechanical loading and fire *** thin-walled liner is made of Functionally Graded Mat...
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This paper proposes an explicit scheme to analyze the failure of a subsea polyhedral tunnel-liner system with an inverted arch under mechanical loading and fire *** thin-walled liner is made of Functionally Graded Materials(FGMs),which may improve the stability behavior of the tunnel-liner *** pressure is inevitable in the liner since underground water may penetrate the cracks of the tunnel,and reach the outer surface of the *** addition,an elevated temperature loading is taken into account,considering that fire may occur in the tunnel-liner *** the combination of mechanical loading and thermal loading,the liner deforms into a single-lobe shape,which is depicted by a trigonometric *** total potential energy is expressed quantitatively after the energy approach and thin-walled shell theory are *** minimum potential energy is obtained when the critical buckling *** critical buckling pressure is calculated,which considers the effect of the thermal *** present analytical prediction is subsequently compared precisely with other closed-form ***,the effects of several parameters,such as the geometric shapes,temperature variations,and volume fraction indices,are discussed to further survey the buckling performance of the nonlinear buckling of an FGM polyhedral liner with an inverted *** may address a polyhedral liner with fewer polyhedral sides,and a lower volume fraction index is recommended to rehabilitate cracked tunnels in engineering applications.
As many countries face the challenges of an aging population and declining birth rates, the demand for labor, particularly for assisting the elderly, is increasing. Traditional robots, being standardized products, req...
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Deep learning architectures have exhibited robust performance in short-term load forecasting tasks, contingent upon access to substantial training datasets. However, the acquisition of such datasets presents significa...
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This paper introduces a novel local fine-grained visual tracking task, aiming to precisely locate arbitrary local parts of objects. This task is motivated by our observation that in many realistic scenarios, the user ...
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The poor wear and corrosion resistance of aluminum alloys has led to the easy failure of surface *** this work,composite coatings of TiC/martensitic stainless steel(TiC/MSS)on aluminum alloy are fabricated by a novel ...
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The poor wear and corrosion resistance of aluminum alloys has led to the easy failure of surface *** this work,composite coatings of TiC/martensitic stainless steel(TiC/MSS)on aluminum alloy are fabricated by a novel approach of circular oscillating laser for enhanced surface performance of alu-minum *** oscillation of laser leads to dense microstructure,and nano/micro scale TiC particles are formed *** structure of coatings transforms from dendritic to ring-like with the ad-dition of TiC,and the hardness of the substrate is increased by 4.5-7.8 *** main wear form of coatings is adhesive *** refinement of microstructure and formation of multi-scale TiC have given rise to an increase in the resistance of the coating to plastic deformation,which reduces the degree of adhesion and improves wear ***,the barrier effect of TiC particles to the electrolyte solu-tion in the passive film gives rise to the drop in corrosion current *** Cr-rich stacking faults can provide nucleation sites for the formation and growth of passive films with high continuity and stability,thereby improving the corrosion resistance of the *** superior anticorrosion and wear resis-tance properties of the composite coatings in this work have emphasized the merits of oscillating laser in fabricating high-performance coatings and would enlighten the design of more advanced composite coatings.
The accurate identification of students in need is crucial for governments and colleges to allocate resources more effectively and enhance social equity and educational fairness. Existing approaches to identifying stu...
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Imaging detection is an important means to obtain target *** traditional imaging detection technology mainly collects the intensity information and spectral information of the target to realize the classification of t...
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Imaging detection is an important means to obtain target *** traditional imaging detection technology mainly collects the intensity information and spectral information of the target to realize the classification of the *** practical applications,due to the mixed scenario,it is difficult to meet the needs of target *** with intensity detection,the method of polarization detection can effectively enhance the accuracy of ground object target recognition(such as the camouflage target).In this paper,the reflection mechanism of the target surface is studied from the microscopic point of view,and the polarization characteristic model is established to express the relationship between the polarization state of the reflected signal and the target surface *** polarization characteristic test experiment is carried out,and the target surface parameters are retrieved using the experimental *** results show that the degree of polarization(DOP)is closely related to the detection zenith angle and azimuth ***(DOP)of the target is the smallest in the direction of light source incidence and the largest in the direction of specular *** materials have different polarization *** comparing their DOP,target classification can be achieved.
Due to the probability characteristics of quantum mechanism, the combination of quantum mechanism and intelligent algorithm has received wide attention. Quantum dynamics theory uses the Schr?dinger equation as a quant...
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Due to the probability characteristics of quantum mechanism, the combination of quantum mechanism and intelligent algorithm has received wide attention. Quantum dynamics theory uses the Schr?dinger equation as a quantum dynamics equation. Through three approximation of the objective function, quantum dynamics framework(QDF) is obtained which describes basic iterative operations of optimization algorithms. Based on QDF, this paper proposes a potential barrier estimation(PBE) method which originates from quantum mechanism. With the proposed method, the particle can accept inferior solutions during the sampling process according to a probability which is subject to the quantum tunneling effect, to improve the global search capacity of optimization *** effectiveness of the proposed method in the ability of escaping local minima was thoroughly investigated through double well function(DWF), and experiments on two benchmark functions sets show that this method significantly improves the optimization performance of high dimensional complex functions. The PBE method is quantized and easily transplanted to other algorithms to achieve high performance in the future.
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