ABSTRACTIn this paper, the characteristics of current hydrogen storage technologies are reviewed from aspects capacity, working conditions, reversibility, and safety. Among mentioned herein, N-containing liquid organic carriers (N-containing LOHCs) regarded as an ideal medium because their excellent performance. However, LOHCs mostly hydrogenated/dehydrogenated by traditional thermal catalysis, which requires strict reaction conditions (120 ~ 200°C; 6 7 MPa) external supply. Thermal...

For intelligent power utilisation of demand side management, the implementation non‐intrusive load identification is an important technology. This study proposed event‐based algorithm for residential loads combined with underdetermined decomposition and characteristic filtering. method first needs to monitor circuit in real time. After detecting electrical switching event, are performed. By combining operating habits equipment, problem that single current signal difficult solve by...

Acoustic approximation has received wide attention in modeling and inversion for the anisotropic wave equation to avoid high computational cost parameter trade-off seismic inversion. However, it also is limited by stability condition, such as instability qP-wave transversely isotropic media with [Formula: see text]. We have developed a new approach that decoupled forward of qP vertical (VTI) acoustic approximation. To keep dispersion relations ([Formula: text]) qSV each direction equal zero,...

Abstract Phase velocity and polarization direction are the important parameters for studying seismic wave propagation describing medium properties, which play essential roles in theory application. We assume that symmetry axis of tilted transverse isotropy (TTI) media lies XOZ plane observation coordinates system directly derive an analytic expression phase TTI this system. Based on Thomson dimensionless anisotropic weak anisotropy approximation theory, we also approximate expressions...

Abstract Two-dimensional nanosheets have attracted considerable attention as oil displacement agent due to their unique interfacial properties. But the high cost limits application of traditional nanosheets. In this study, a hydrophilic magnesium-based nanosheet (HMN) was synthesized and modified obtain amphiphilic nanosheets(AMN). The influences reaction time, temperature, stirring rate raw materials ratio product were studied optical condition summed up follows: time 27 h, temperature 50...

The transversely‐isotropic (TI) media is the most common anisotropic in sedimentary rock. When formations rotate, because of folding and thrusting, symmetry axis TI tilted instead vertical or horizontal, which yields so‐called (TTI) with axis. In this paper, based on plane wave theory, we derived exact approximate expressions reflection coefficient waves two elastic TTI under welded contact condition by generalizing Aki Richards, Rüger. Based displacement function, established Zeoppritz...

This article aimed to use the proximal policy optimization (PPO) algorithm address limitations of power system startup strategies, enhance adaptability, coping ability, and overall robustness variable grid demand integrated renewable energy, constraints in start-up strategy are optimized. Firstly, this constructed a dynamic model system, including key components such as generators, transformers, transmission lines; secondly, it PPO designed interfaces that allow interact with model;...

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In order to test and analyze the occupational disease hazard factors of a precision tool manufacturing enterprise in Shaanxi Province, provide protective measures for protecting health workers. We tested analyzed Province by field investigation method detection August 2022. Resultly, main are dust noise, time-weighted average concentration contact point is less than 0.3 mg / m³, meet requirements limit; There 21 noise working points, equivalent sound level strength fitter area...

Summary VSP is a kind of borehole seismic exploration method, which connecting ground data with drilling and geological data. The accurate elastic parameters obtaining from method foundation the horizon calibration, explanation prediction oil gas. In this paper, we use simulated annealing algorithm to obtain near mouth well under scale frequency band based on wave equation. Global optimization applied containing small amount can overcome disadvantages conventional full waveform inversion...

In order to solve the problem of low computational efficiency global optimization algorithm in wave equation inversion, we propose a segmented fast simulated annealing (SFSA) for velocity full waveform inversion VSP data. The SFSA adopts kind strategy using different disturbance models and methods iterations. At same time, generate model combined with idea non-uniform mutation on later stage improve convergence speed. We perform zero offset P-wave FWI very (VFSA) respectively initial...

The elastic wave propagation is coupled in VTI media. Different approximations are used to obtain single equation, such as acoustic approximation and weak anisotropic approximation. In this paper, we start from the exact phase velocities media, propose an approximate qP-wave velocity based on method of completing square. Then derive corresponding pure equation choosing hybrid solver. accuracy tested. results show a good strong anisotropy. Numerical examples that our proposed stable free S...