Mold electromagnetic stirring technology for optimizing the flow of molten steel is now widely used in the continuous casting production process of high-quality ***,studies on the case that the center of the electroma...
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Mold electromagnetic stirring technology for optimizing the flow of molten steel is now widely used in the continuous casting production process of high-quality ***,studies on the case that the center of the electromagnetic stirrer is located outside the mold have not been ***,the effect of the electromagnetic stirrer centered outside the mold on the steel flow field was studied in detail by means of numerical simulations.A Gauss meter was used to measure the magnetic induction intensity at different positions,currents,and *** test results were compared with the simulation results of electromagnetic stirring to calibrate and verify the accuracy of the electromagnetic ***,electromagnetic force was introduced into the flow field model as a source term to study its effect on the flow field under anomalous *** results show that when the center of the electromagnetic stirrer is located outside the mold,the magnetic field strength is about twice as strong as that located inside the *** also leads to an increase in the flow velocity near the electromagnetic *** a result,the optimal electromagnetic stirring parameters(200 A,2.5 Hz)were specified when the center of the electromagnetic stirrer is located outside the mold.
Flame detection algorithms are crucial for real-time fire monitoring using surveillance cameras. Current flame detection algorithms perform excellently on color cameras;however, many night vision cameras can only capt...
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This paper investigates the controllability of general linear discrete-time multi-agent systems with directed and weighted signed networks by using graphic and algebraic *** nondelay and delay cases are considered ***...
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This paper investigates the controllability of general linear discrete-time multi-agent systems with directed and weighted signed networks by using graphic and algebraic *** nondelay and delay cases are considered *** the case of no time delay,the upper bound condition of the controllable subspace is given by using the equitable partition method,and the influence of coefficient matrix selection of individual dynamics is *** the case of single delay and multiple delays,the equitable partition method is extended to deal with time-delay systems,and some conclusions are *** particular,some simplified algebraic criteria for controllability of systems with time delay are obtained by using augmented system method and traditional algebraic controllability criteria.
This paper presents a largely and accurate analysis for dynamic model of U-shaped actuator that considers the material parameters dependent on temperature. The electro-thermal analysis for temperature distribution and...
The incidence of skin cancer is increasing globally, with melanoma being the most formidable form of skin cancer. Melanoma originates from melanocytes, which exhibit a high degree of visual similarity. Moreover, dermo...
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Gasification technology can effectively realize energy recovery from municipal solid waste(MSW)to reduce its negative impact on the ***,ammonia,as a pollutant derived from MSW gasification,needs to be treated because ...
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Gasification technology can effectively realize energy recovery from municipal solid waste(MSW)to reduce its negative impact on the ***,ammonia,as a pollutant derived from MSW gasification,needs to be treated because its emission is considered harmful to *** work aims to decompose the NH3 pollutant from MSW gasification by an in-situ catalytic *** MSW sample is composed of rice,paper,polystyrene granules,rubber gloves,textile and wood ***–M(M=Co,Fe,Zn)bimetallic catalysts supported on sewage sludge-derived biochar(SSC)were prepared by co-impregnation method and further characterized by X-ray diffraction,N2 isothermal adsorption,scanning electron microscopy,transmission electron microscopy and NH3 temperature programmed *** to the experiments,the catalysts were first homogeneously mixed with the MSW sample,and then in-situ catalytic tests were conducted in a horizontal fixed-bed *** effect of the second metal(Co,Fe,Zn)on the catalytic performance was compared to screen the best Ni-M *** was found that the Ni–Co/SSC catalyst had the best activity toward NH3 decomposition,whose decomposition rate reached 40.21%at 650℃.The best catalytic performance of Ni–Co/SSC can be explained by its smaller Ni particle size that facilitates the dispersion of active sites as well as the addition of Co reducing the energy barrier for the associative decomposition of NH species during the NH3 decomposition ***,the activity of Ni–Co/SSC increased from 450℃to 700℃as the NH3 decomposition reaction was endothermic.
Recent state-of-the-art semi-supervised learning(SSL)methods usually use data augmentations as core *** methods,however,are limited to simple transformations such as the augmentations under the instance’s naive repre...
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Recent state-of-the-art semi-supervised learning(SSL)methods usually use data augmentations as core *** methods,however,are limited to simple transformations such as the augmentations under the instance’s naive representations or the augmentations under the instance’s semantic *** tackle this problem,we offer a unique insight into data augmentations and propose a novel data-augmentation-based semi-supervised learning method,called Attentive Neighborhood Feature Aug-mentation(ANFA).The motivation of our method lies in the observation that the relationship between the given feature and its neighborhood may contribute to constructing more reliable transformations for the data,and further facilitating the classifier to distinguish the ambiguous features from the low-dense ***,we first project the labeled and unlabeled data points into an embedding space and then construct a neighbor graph that serves as a similarity measure based on the similar representations in the embedding ***,we employ an attention mechanism to transform the target features into augmented ones based on the neighbor ***,we formulate a novel semi-supervised loss by encouraging the predictions of the interpolations of augmented features to be consistent with the corresponding interpolations of the predictions of the target *** carried out exper-iments on SVHN and CIFAR-10 benchmark datasets and the experimental results demonstrate that our method outperforms the state-of-the-art methods when the number of labeled examples is limited.
Adaptive FRIT (A-FRIT) with exponential for-getting (EF) has been proposed for time-varying systems to improve the data dependence of FRIT, which is a direct data-driven tuning method. However, the EF -based method is...
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Large area closed RF discharge plasma system has multi-variable, large delay, nonlinear and strong coupling between its control loops. A single-neuron adaptive PID control strategy was proposed to maintain the stabili...
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The photocatalytic CO_(2) cycloaddition to prepare high value-added chemicals,such as cyclic carbonates(CCs)under mild conditions is an effective strategy to realize carbon ***,through a three-step reaction,the porphy...
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The photocatalytic CO_(2) cycloaddition to prepare high value-added chemicals,such as cyclic carbonates(CCs)under mild conditions is an effective strategy to realize carbon ***,through a three-step reaction,the porphyrin-based covalent organic polymer with bimetallic active sites(Fe-COP-Zr)is successfully obtained by coordinating Fe^(2+) and Zr^(4+)with porphyrin and bipyridine(Bpy),*** to excellent photosensitivity of porphyrin moieties,Fe-COP-Zr exhibits outstanding visible light absorption,which is very important for the production of photogenerated ***,Fe-COP-Zr shows high photocatalytic performance towards CO_(2) cycloaddition with a yield of 12.1 mmol/h,which is 6 times higher than that of pure covalent organic polymer(COP)and 3 times higher than that of monometallic *** reason for this excellent photocatalytic CO_(2) cycloaddition performance may be ascribed to the synergistic effect of Fe and Zr *** photogenerated electrons are easily injected into epichlorohydrin(ECH)through Fe—O bonds to form affluent electron transition state,and interact with Zr^(4+) as Lewis acid sites for the ring-opening of ECH,which is the rate-determining step for the visible light boosted chemical fixation of CO_(2) into *** work might provide some insights for design and preparation of COPs with multiple active sites to modulate their photocatalytic activities.
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