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Aiming at the problems that traditional image dehazing algorithms are easily restricted by prior knowledge and color distortion,a multi-scale feature fusion image dehazing algorithm combined with attention mechanism is proposed.The algorithm first obtains feature maps of multiple scales through down-sampling operations,and then uses skip connections between feature maps of different scales to connect the feature maps of the encoder part and the decoder part for feature fusion.At the same time,a feature attention module composed of channel attention submodule and pixel attention submodule is added to the network to control the importance of different channels and pixels.This feature attention module allows the network to pay more attention to detailed information and important features,therefore,a better dehazing effect can be achieved.In order to verify the effectiveness of the proposed algorithm,qualitative and quantitative comparative experiments are carried out on the RESIDE dataset with five popular dehazing algorithms.The experimental results show that the proposed algorithm can more completely dehazing,and the preservation of image color is better.At the same time,the average values on the two evaluation indicators PSNR (Peak Signal to Noise Ratio) and SSIM (Structure Similarity) are 28.83 dB and 0.957 5,respectively,which are 2.23 dB and 0.017 2 higher than the second-performance model in the comparison algorithm.Then,qualitative comparison experiments are performed between the proposed algorithm and five comparison algorithms on the MSD data set and real images.The experimental results further prove that the proposed algorithm has good dehazing performance and color retention.

A new species, Smilax weniae (Smilacaceae), from Southwest China, is described and illustrated. The new species bears peltate leaves, which was previously a unique feature of S. luei. However, it differs from the latter by having a broad ovate leaf blade, longer peduncle, and sexual dimorphic flowers. Further phylogenetic analyses revealed that the new species were placed in a unique position in a subclade of Old World Smilax based on ptDNA and nrITS sequences. Combining detailed morphological comparisons and molecular evidence, we validated that S. weniae is an undescribed new species. Moreover, the plastome characteristics of S. weniae are reported.

HLA‐A*02:1146 differs from HLA‐A*02:01:01:01 by one nucleotide in exon 1. [ABSTRACT FROM AUTHOR]

The secondary effluent of the sewage treatment plant was treated by sodium hypochlorite oxidation combined with powdered activated carbon and ultrafiltration process (NaClO-PAC-UF). The effects of the dosage of NaClO, pH and temperature on the removal of antibiotic resistance genes (ARGs) and dissolved organic carbon (DOC) in the secondary effluent were investigated. The results show that 8.0 mg/L effective chlorine concentration of sodium hypochlorite oxidizing agent was the best removal effect. The removal amount of different types of ARGs (tetA, tetC, tetG, sulI, sulII) in secondary effluent was 103.25 ~ 103.47 copies/mL. The removal effect of cellular and free ARGs was significantly enhanced. The removal rate of DOC by the combined process was up to 57.5 %, and the removal rate of organic matter with different molecular weight was improved overall. Increasing temperature and decreasing pH can improve the removal effect of ARGs by the combined process. [ABSTRACT FROM AUTHOR]

The paper introduced principles of fault diagnosis method based on Park vector transformation, spectrum analysis of stator current based on Fourier transformation and the method based on wavelet transformation, and analyzed and discussed application effects of the three methods in fault diagnosis of three-phase cage type asynchronous motor.