This work focuses on iterative nonlinear sliding-mode controllers designing for two typical dynamic *** the system disturbance,two general iterative nonlinear sliding mode control methods for a single-input single-out...
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ISBN:
(纸本)9781538629185
This work focuses on iterative nonlinear sliding-mode controllers designing for two typical dynamic *** the system disturbance,two general iterative nonlinear sliding mode control methods for a single-input single-output system and a typical single-input multiple-output system are designed,which are both proved asymptotically *** the same time,it is proved that the hyperbolic tangent function is used to replace the traditional symbolic function,which not only can effectively solve the problem of high frequency vibration,but also would not affect the system *** simulations on tethered satellite system in orbital maneuvering demonstrate the validity of the proposed algorithms.
The present study reports the preparation and characterization of Cr 2 O 3 –Al 2 O 3 composite pigments with low visible and high near-infrared (NIR) reflectance. The complex pigments were prepared by Solid-State Rea...
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The present study reports the preparation and characterization of Cr 2 O 3 –Al 2 O 3 composite pigments with low visible and high near-infrared (NIR) reflectance. The complex pigments were prepared by Solid-State Reaction Sintering Method. The effects of calcination temperature and Al 2 O 3 content on reflectance were investigated by SEM, X-ray diffraction, XPS and UV-VIS-NIR spectroscopy. And the resistance of the complex Cr 2 O 3 –Al 2 O 3 pigments were further discussed to analyze the carrier concentration. The results reveal that the complex Cr 2 O 3 –Al 2 O 3 pigments having good optical performance and acid-alkali resistance can be prepared by the calcination of the precursor at about 1000 °C. The prepared complex Cr 2 O 3 –Al 2 O 3 pigments will be beneficial in applications such as cool materials used for buildings with energy saving performance.
In recent years, there has been a wave of research on English image caption at home and abroad. However, due to the particularity of Chinese image caption task, the research on Chinese image caption has not made good ...
In recent years, there has been a wave of research on English image caption at home and abroad. However, due to the particularity of Chinese image caption task, the research on Chinese image caption has not made good progress. In order to solve this problem, a new Chinese image caption model is implemented. Firstly, the AI challenge dataset is enhanced, and then the Chinese text data of the dataset is preprocessed by Chinese word segmentation tool word2vec. Secondly, based on the encoder-decoder framework, the image visual features are extracted by Inceptionv4 network, the attention mechanism is incorporated in the process of feature extraction and the Chinese sentences are generated by double-layer GRUs network. In the process of training, Adam is used to optimize the algorithm. Finally, A GUI interface is designed to better show the experimental effect. Experiments show that the new Chinese image caption model can automatically generate more fluent and more accurate Chinese caption sentences, and the trained model has excellent performance in many evaluation indexes.
作者：
Xiwen FengFei TongSchool of College of Energy and Mining Engineering
State Key Laboratory of Mining Disaster Prevention and Control Cofounded by Shandong Province and the Ministry of Science and Technology National Demonstration Center for Experimental Mining Engineering Education Shandong University of Science and Technology Qingdao266590 China
Electric power development is the key factor of economic development, but also an important guarantee of industrial modernization. At present, with the improvement of people's quality of life, electricity has beco...
Electric power development is the key factor of economic development, but also an important guarantee of industrial modernization. At present, with the improvement of people's quality of life, electricity has become an indispensable part of ensuring people's lives. Therefore, the stable and reliable development of power system has an important impact on economic development, industrial modernization and people's lives. With the continuous maturity of the reliability theory, the power system and its combination have evolved into an important application subject called the reliability evaluation of the power system, which has penetrated into the whole industrial chain of the power system, which is a reliable guarantee for the industrial chain to gain economic and social benefits. Based on the analysis of the operation reliability of power system, this paper puts forward the main measures to improve the operation reliability of power system in order to meet the operation requirements.
Long-range magnetic orders in atomically thin Ising ferromagnetic CrI3together with their promising electronic and optical properties give rise to new fascinating physics. However, to date, there has been no experimen...
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Deep learning has shown great advantages in biomedical image segmentation. The classic model U-Net uses a stacked encoding-decoding structure of convolution operations for feature extraction and pixel-level classifica...
Deep learning has shown great advantages in biomedical image segmentation. The classic model U-Net uses a stacked encoding-decoding structure of convolution operations for feature extraction and pixel-level classification. The stacking of convolutional layers can expand the receptive field, but it is still a local operation and cannot capture long-distance dependence. Therefore, in this work, we propose a Global Attention Mechanism that combines channel attention module and spatial attention module and integrates different convolutions in it. Besides, we design a residual module for the traditional up and down sampling blocks. And finally, we combine them with U-Net to propose a new global attention network GAU-Net. We perform experiments on the dataset BraTS2018. Our model has increased the mIoU from 0.65 to 0.75 with only 5.4% of U-Net parameters. At the same time, the inference time is also significantly shortened with relatively good performance.
作者：
Xiwen FengMengying GaoYu ZhouJing LiSchool of College of Energy and Mining Engineering
State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology National Demonstration Center for Experimental Mining Engineering Education Shandong University of Science and Technology Qingdao 266590 China
This article combines the characteristics of the gold museum building structure, facilities distribution and personnel distribution characteristics, uses AnyLogic to complete the museum's environmental modeling an...
This article combines the characteristics of the gold museum building structure, facilities distribution and personnel distribution characteristics, uses AnyLogic to complete the museum's environmental modeling and visitor behavior modeling, simulates the completed tourist evacuation model, analyzes the evacuation process of personnel, and responds to potential safety hazards. The evacuation process was simulated and optimized, and an improvement plan was proposed. Finally, reference suggestions were made for the tourist evacuation plan of the Gold Museum. It provides a way of thinking and method for safe evacuation in scenic spots, and has certain practical application value.
Thermodynamic equilibrium calculations were performed to reveal effects of interactions among Cl, S, P and other minerals on Cu migration. Our results showed that HCl（g）, SO2（g） and （P2O5）2（g） were released fr...
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Thermodynamic equilibrium calculations were performed to reveal effects of interactions among Cl, S, P and other minerals on Cu migration. Our results showed that HCl（g）, SO2（g） and （P2O5）2（g） were released from the sewage sludge co-incineration. Cl was found to weaken adsorption of Cu by Al2O3, CaO and Fe2O3, while S de- layed reactions of Fe2O3 and Al2O3 with Cu, with P having no effect on reactions between the minerals and Cu. Among the coupled systems ofCl, S and P, the co-existences of Cl and S, and Cl, S and P were determined to inhibit Cu volatilization, and the co-existence of Cl and P had an enhancing effect Cu migration was affected only by S in the S and P system. With the SiO2, CaO and Al2O3 system, both Cl alone and Cl and P led to failed reactions be- tween the minerals and Cu. In the systems of S, S and Cl, S and P, and S, Cl and P, the migration behavior of Cu was mainly affected by S at low temperatures and by Cl at high temperatures, whereas P had no effect on Cu mi- gration during the entire nrocess.
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