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30 results on '"Wu, Weilong"'

7. CALPA-NET: Channel-pruning-assisted Deep Residual Network for Steganalysis of Digital Images

Author

Tan, Shunquan, Wu, Weilong, Shao, Zilong, Li, Qiushi, Li, Bin, and Huang, Jiwu

Subjects
Computer Science - Multimedia, Electrical Engineering and Systems Science - Image and Video Processing
Abstract

Over the past few years, detection performance improvements of deep-learning based steganalyzers have been usually achieved through structure expansion. However, excessive expanded structure results in huge computational cost, storage overheads, and consequently difficulty in training and deployment. In this paper we propose CALPA-NET, a ChAnneL-Pruning-Assisted deep residual network architecture search approach to shrink the network structure of existing vast, over-parameterized deep-learning based steganalyzers. We observe that the broad inverted-pyramid structure of existing deep-learning based steganalyzers might contradict the well-established model diversity oriented philosophy, and therefore is not suitable for steganalysis. Then a hybrid criterion combined with two network pruning schemes is introduced to adaptively shrink every involved convolutional layer in a data-driven manner. The resulting network architecture presents a slender bottleneck-like structure. We have conducted extensive experiments on BOSSBase+BOWS2 dataset, more diverse ALASKA dataset and even a large-scale subset extracted from ImageNet CLS-LOC dataset. The experimental results show that the model structure generated by our proposed CALPA-NET can achieve comparative performance with less than two percent of parameters and about one third FLOPs compared to the original steganalytic model. The new model possesses even better adaptivity, transferability, and scalability., Comment: Accepted by IEEE Transactions on Information Forensics & Security

Published
2019

25. Palladium-catalyzed butoxycarbonylation of (hetero)aryl multibromides-a practical method for the preparation of aryl carboxylate and carboxylic acid

Author

Ji, Baoming, Wu, Weilong, Jing, Yongkang, Zhang, Deyi, Yan, Xianghe, Liang, Rong, and Lu, Zhiqiang

Subjects
(N-hetero)aryl multibromides, palladium-catalyzed butoxycarbonylation, Pd(OAc)2/rac-BINAP, polycarboxylic acid, practical applications, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY
Abstract

Supporting Information for Palladium-catalyzed butoxycarbonylation of (hetero)aryl multibromides-a practical method for the preparation of aryl carboxylate and carboxylic acid Weilong Wua, Yongkang Jing a, Deyi Zhang b, Xianghe Yan a, Rong Liang c, Zhiqiang Lu a, Baoming Ji a,* a College of Chemistry and Chemical Engineering and Henan Key Laboratory of Function-Oriented Porous Materials, Luoyang Normal University, Luoyang, 471934, China b College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China c College of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China Corresponding author E-mail: lyhxxjbming@126.com NMR Spectra

Published
2021
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29. Electrochemical Synthesis of Cyclic Diaryl Phosphinamides via Intramolecular sp2C–H Phosphinamidation

Author

Gao, Wenchao, Zong, Luyi, Wu, Weilong, Zhu, Ming, Liu, Wenmin, Zhao, Yiyang, Li, Ting, and Zhang, Sheng

Abstract

We developed an oxidant- and transition-metal-free approach to construct six-membered cyclic phosphinamides via an intramolecular electrochemical C–H phosphinamidation process. With nBu4NBr as the catalyst and electrolyte, cyclic phosphinamides bearing a variety of functional groups (22 examples) were readily accessed under mild conditions. Meanwhile, this protocol provided an alternative route to organic electroluminescent materials and P–N ligands.

Published
2021
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30. Electrochemical Synthesis of Cyclic Diaryl Phosphinamides via Intramolecular sp 2 C-H Phosphinamidation.

Author

Gao W, Zong L, Wu W, Zhu M, Liu W, Zhao Y, Li T, and Zhang S

Subjects
Catalysis, Molecular Structure, Transition Elements
Abstract

We developed an oxidant- and transition-metal-free approach to construct six-membered cyclic phosphinamides via an intramolecular electrochemical C-H phosphinamidation process. With n Bu 4 NBr as the catalyst and electrolyte, cyclic phosphinamides bearing a variety of functional groups (22 examples) were readily accessed under mild conditions. Meanwhile, this protocol provided an alternative route to organic electroluminescent materials and P-N ligands.

Published
2022
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