In this study, structural parameters of Longkou oil shale kerogen were examined and identified by the combination pyrolysis–gas chromatography–mass spectrometry, Fourier transform infrared spectroscopy, 13C nuclear magnetic resonance X-ray photoelectron spectroscopy. Based on experimental data, a three-dimensional model was generated using quantum chemistry molecular dynamics methods. The optimized configuration discussed, which showed good agreement with results in terms characteristics....

Many computation-intensive industrial applications need to be run in the cloud, which relies on a lot of sharply varying data transmitted from field. To save communication bandwidth and ensure with required accuracy obtained by we design transmission architecture based dual prediction scheme cloud-edge collaboration dual-mode algorithm deep learning. With proposed architecture, learning model is deployed synchronized edge cloud sides. Further, can help for computation locally predicted or...

As the transition to renewable energy sources intensifies, offshore wind power has rapidly emerged as a critical component of new landscape. However, complexity turbine failure mechanisms, difficulty operation and maintenance, high cost all put forward strict requirements for monitoring real-time health analysis turbines. Operational data from generators often includes numerous anomalies such noise, faults, instances abandonment, which reduce data's availability consequently, precision...

Abstract A thermogravimetric analyzer was used to study the pyrolysis characteristics of an oil shale at different heating rates. Friedman, Flynn–wall–Ozawa ( FWO ), and distributed activation energy model DAEM ) methods were calculate kinetic parameters low‐temperature shale. The results show that as rate increases, (a) initial temperature, peak final temperature shift toward high‐temperature region, (b) range devolatilization (c) value weight loss increases. apparent energies calculated...

The mixed tin (Sn) and lead (Pb) perovskite compositions have shown great potential in photovoltaic devices due to the significantly enhanced material stability prolonged carrier lifetime, compared pure Sn halide perovskites.

Lead-free halide double perovskites (LFDPs) arouse great interest as environmentally friendly substitutes to the state-of-the-art lead perovskites. However, most LFDPs feature large bandgaps that afford weak visible-light absorption. Herein, we synthesized and systemically studied single-crystallographic, physical–chemical, band structural, electronic properties of a series multidimensional Au-based lead-free hybrid polymorphs, [(NH3CH3)2(AuI4)(AuI2)], [(NH2CHNH2)(AuI4)(AuI2)],...

Fast and accurate fault diagnosis of photovoltaic (PV) modules has been the focus intelligent operation maintenance for PV systems. Considering efficiency cost, many machine learning (ML) based methods are widely used in practice. Due to increasing scale stations, series-parallel topology system becomes more complicated, multiple faults may inevitably occur together. However, most existing only consider case a single occurrence or basic compound faults, which fails assess state...

The microservice architecture has gained widespread adoption in smart manufacturing, enabling the collaborative completion of production tasks through integration multiple microservices. However, migrating microservices dynamic environments poses challenges for maintaining quality and service efficiency. Firstly, there are complex dependencies between microservices, such as layered chain structures, making migration a difficult process. Secondly, large-scale scenarios require rapid...

Attribute reduction, also called feature selection, serves as a widely adopted approach to reduce data processing complexity by eliminating irrelevant and redundant attributes. It plays crucial role in addressing the challenges associated with high-dimensional data, optimizing computational resources, enhancing learning performance. A well-designed attribute reduction method can effectively streamline analysis processes improve overall efficiency effectiveness of machine algorithms. To some...

The intrinsic and K⁺-doping-induced properties of a MAPbI₃ material MAPbI₃/TiO₂ junction have been elucidated.

This work is dedicated to theoretically investigating the mixed-halide direct band gap organic–inorganic hybrid double perovskites (OIHdPs), MA2AgIn(BrxI1–x)6, with and without anion vacancy point (AVP) defects. We calculate their structural optoelectronic properties different halide compositions find that effect of composition on MA2AgIn(BrxI1–x)6 quite from lead-bearing perovskites. All vacancy-free I-bearing systems (x ≠ 1) have nearly same width carrier activity MAPbI3. The Br-rich >...

Due to the unequal effect of spin–orbit coupling (SOC) interaction on band structure, pristine MA₄[AgBi]Br₈ possesses an indirect gap. However, both its gap and SOC are sensitive strain, >%2 stretching ratio can turn it into a direct-band semiconductor.

For powering various micro/nanodevices and systems, it is necessary to develop a thin film micro-battery with high capacity outstanding cycle performance. By using radio frequency (RF) magnetrons sputtering, tin oxide films used for micro-batteries negative electrode were deposited on silicon substrates. Besides, doping metal impurity Cu was improve the performance of films. The results showed that increasing Cu-doping content, phase tended from crystalline amorphous, SnO x increased,...

Concrete subjected to fire loads is susceptible explosive spalling, which can lead the exposure of reinforcing steel bars fire, substantially jeopardizing structural safety and stability.The spalling fire-loaded concrete closely related evolution pore pressure temperature.Conventional analytical methods involve resolution complex, strongly coupled multifield equations, necessitating significant computational efforts.To rapidly accurately obtain distributions pore-pressure temperature,...

In this paper, an intelligent decision scheme for a fish swarm algorithm is presented. The in the applied on optimizing power consumption system to reduce energy and improve efficiency. By applying appraise optimizes of system, finding optimal complex environment, effectively relieves pressure reduces waste.

Abstract Ultrathin crystalline materials are a class of popular that can potentially exhibit fascinating physical and chemical properties dictated by their unique stacking freedom. However, it is challenging to achieve the controllable synthesis over structure for ultrathin materials. Herein, water employed as key regulatory factor realize phase engineering in nanosheets (NSs), thereby altering faults distinct arrangements. Ruthenium (Ru) NSs with consistent specific surface areas but...

In this paper, we propose a new denoising algorithm for electromagnetic ultrasonic signals based on the improved EEMD method, which can adaptively adjust added noise and average times in different noisy environments, so that effect of residual difference white results be eliminated as far possible. First, way to add method is processed, then permutation entropy used identify nature components obtained during decomposition. Then wavelet transform modulus maximum deal with IMF high-frequency...

Tin-based perovskites are one of the most promising candidates for development lead-free perovskite solar cells (PSCs) and have attracted lots attention. Despite extensive research efforts, performance tin-based PSCs (Sn-PSCs) still lags far behind lead containing counterparts due to poor stability self-p-doping. Here, we perform first-principles density functional theory calculations combined with non-adiabatic molecular dynamics simulations unveil origins instability tin iodine when...

Heat transfer due to forced convection caused by acoustic streaming in microfluidic devices is shown have potential cooling effect. However, few studies are made for theoretically studying the fluid motion induced field and heat micro microdevices. In this paper, Navier-Stokes equations first employed study radiation force microchannel actuated ultrasonic vibration. Then, an analytical of acoustically temperature investigated determine enhancement effect with streaming.

At present, there’s unbolt independent system of green assessment concerning construction process, let alone a sub –part engineering. In this paper, based on grey clustering method and evaluating model studied previously, the index is proposed with addition deletion indexes in term wall project. Finally, methods evaluation will be applied to two actual engineering schemes for evaluation. The conclusions compared, showing more feasible.

Small scale Readout Integrated Circuit (ROIC) still remain application requirements because of its lower cost, power and smaller structure size. A 128×128 format flexible small pixel ROIC was promoted in this paper. In the 30μm pitch pixel, an integration capacitance high to 2.1pF realized, so input charge handling ability can reach 47 Million electrons. The work both integrate-then-read (ITR) integrate-while-read (IWR) mode, which is decided by signal. serial data used realize some...