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Construction of Catalytic Covalent Organic Frameworks with Redox-Active Sites for the Oxygen Reduction and the Oxygen Evolution Reaction

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Angewandte Chemie 2022年第49期134卷

作者： Minghao Liu Sijia Liu Dr. Cheng-Xing Cui Qiyang Miao Prof. Yue He Prof. Xuewen Li Prof. Qing Xu Prof. Gaofeng Zeng CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research Institute (SARI) Chinese Academy of Sciences (CAS) Shanghai 201210 P. R. China School of Chemical Engineering University of Chinese Academy of Sciences 19A Yuquan Road Beijing 100049 P. R. China Contribution: Conceptualization (lead) Data curation (lead) Formal analysis (lead) Writing - original draft (lead) Writing - review & editing (supporting) Contribution: Conceptualization (equal) Data curation (equal) Investigation (equal) Writing - original draft (equal) School of Chemistry and Chemical Engineering Henan Institute of Science and Technology Xinxiang 453003 P. R. China Contribution: Methodology (lead) Software (lead) Writing - original draft (supporting) Contribution: Conceptualization (supporting) Software (supporting) Department of Oral and Maxillofacial-Head and Neck Oncology Shanghai Ninth People's Hospital Shanghai Jiao Tong University Shanghai 200011 P. R. China Contribution: Project administration (equal) Resources (equal) Writing - original draft (equal) Contribution: Data curation (supporting) Investigation (supporting) Methodology (supporting) Contribution: Conceptualization (lead) Project administration (lead) Writing - original draft (lead) Writing - review & editing (lead) Contribution: Conceptualization (equal) Funding acquisition (lead) Project administration (lead) Writing - original draft (equal) Writing - review & editing (lead)

Construction of catalytic covalent organic frameworks (COFs) for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is significant but rarely demonstrated. In this work, we have first constructed bifunctional COFs towards ORR and OER by integrating diarylamine derivatives into the Co-porphyrin based frameworks. Both of the new COFs (CoTAPP-PATA-COF and CoTAPP-BDTA-COF) have good ordered structures, high surface areas, and robust chemical stability. The diarylamine units, as a typical electron donor and redox-active cores, promote intramolecular electron transport along the frameworks and improve the electrochemically active surface areas. Thus, the COFs showed higher catalytic activities than that of the COF without redox-active units. CoTAPP-PATA-COF had a halfwave potential of 0.80 V towards ORR, and delieved an overpotential of 420 mV for OER in 0.1 M KOH. The theoretical calculation revealed introducing diarylamine unites improved the oxygen electrocatalysis.

关键词： Bifunctional Catalysts Covalent Organic Frameworks Oxygen Evolution Reaction Oxygen Reduction Reaction Redox-Active Sites

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Controllability analysis of transcriptional regulatory networks for Saccharomyces cerevisiae 44

Controllability analysis of transcriptional regulatory netwo...

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44th Annual Conference of the IEEE Industrial Electronics Society, IECON 2018

作者： Liu, Suling Wang, Pei Xu, Qiong Chen, Aimin Lü, Jinhu School of Mathematics and Statistics Henan University Kaifeng China School of Mathematics and Statistics Institute of Applied Mathematics Laboratory of Data Analysis Technology Henan University Kaifeng China School of Mathematics and Statistics Institute of Applied Mathematics Henan University Kaifeng China School of Automation Science and Electrical Engineering State Key Laboratory of Software Development Environment Beijing Advanced Innovation Center for Big Data Brain Machine Intelligence Beihang University Beijing China

ISBN: (纸本)9781509066841

Structural controllability of complex networks has been a research focus in recent years. However, few works considered the structural controllability of biological networks, especially for dynamic biological networks. In this paper, structural controllability of one static and five dynamic transcriptional regulatory networks (TRNs) for Saccharomyces cerevisiae (S. cerevisiae) have been investigated. The five dynamic networks included two endogenous and three exogenous ones. We clarified the controllability properties of these networks, as well as explored the differences among different types of networks. Our results revealed that the structural properties of different types of networks are significantly different. We found that the TRNs are rather difficult to be fully controlled. However, the dynamic TRNs were relatively easier to be controlled than the static one, and one needs relatively more external inputs to control the exogenous TRNs than the endogenous ones. Based on the structural controllability analysis of subnetworks with the same sizes, as well as randomly perturbed networks by preserving degree distributions, we further illustrated that the structural controllability of the six networks may be mainly dominated by their degree distributions. Our investigations clarify the control properties of TRNs in S. cerevisiae, it provides some insights on real-world control of biological networks. © 2018 IEEE.

关键词： Complex networks

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Stability Analysis of An e-SEIR System in Network Society

Stability Analysis of An e-SEIR System in Network Society

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International Conference on Security, Pattern Analysis, and Cybernetics (SPAC)

作者： Shao-Ting Ge Zhimin Liu Lijuan Kang Zhenxiang Yuan Guanan Yao Ruoxuan Lin College of Data Science and Software Engineering Qingdao University Qingdao China School of Information Qingdao Technical College Qingdao China

ISBN: (纸本)9781728105529

We analyzed the a discrete-time e-SEIR system, which represents the computer virus propagation model in network society. Firstly, we derive two kinds of equilibriums for the model. Secondly, we obtain sufficient stability condition for the no-disease equilibrium using the first Lyapunov stability method. Lastly, we obtain stability conditions for the disease equilibrium using disc theory.

关键词： Mathematical model Computational modeling Diseases Stability analysis Computer viruses Erbium Analytical models

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A secure rational quantum state sharing protocol

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science China(Information sciences) 2018年第2期61卷 204-215页

作者： Zhao DOU Gang XU Xiu-Bo CHEN Xin LIU Yi-Xian YANG Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and Telecommunications School of Software Engineering Beijing University of Posts and Telecommunications Gui Zhou University Guizhou Provincial Key Laboratory of Public Big Data School of Computer Science Shaanxi Normal University School of Information Engineering Inner Mongolia University of Science and Technology

A novel rational protocol to share two arbitrary qubits among multiple parties is investigated in this paper. First, the protocol is presented, which is learned from Li et al.'s protocol. Second, the utility,security, correctness, fairness, Nash equilibrium, and Pareto optimality of our scheme are discussed in detail,where the utility, correctness, and fairness of rational quantum state sharing protocols are creatively given because the agent who recovers the state plays a different and more important role. Another important point is that assumptions about our protocol are more practical and suitable than existing protocols.

关键词： rational quantum state sharing Nash equilibrium secure correct

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Regulating Relative Nitrogen Locations of Diazine Functionalized Covalent Organic Frameworks for Overall H2O2Photosynthesis

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Angewandte Chemie 2023年第41期135卷

作者： Dr. Qiaobo Liao Qiannan Sun Haocheng Xu Yandong Wang Yang Xu Ziyu Li Jinwu Hu Prof. Ding Wang Prof. Huijun Li Prof. Kai Xi School of Materials and Chemistry University of Shanghai for Science and Technology Shanghai 200093 P. R. China School of Chemistry and Chemical Engineering Nanjing University Nanjing Jiangsu 210023 P. R. China Contribution: Data curation (lead) Formal analysis (supporting) Funding acquisition (supporting) Investigation (equal) Software (lead) Visualization (equal) Writing - original draft (lead) Writing - review & editing (equal) Contribution: Data curation (supporting) Formal analysis (equal) Investigation (equal) Writing - original draft (supporting) Writing - review & editing (supporting) Contribution: Data curation (equal) Formal analysis (equal) Investigation (equal) Writing - original draft (supporting) Writing - review & editing (supporting) Contribution: Investigation (supporting) Writing - review & editing (supporting) Contribution: Conceptualization (equal) Funding acquisition (equal) Project administration (lead) Supervision (supporting) Writing - original draft (supporting) Writing - review & editing (equal) Contribution: Conceptualization (equal) Funding acquisition (supporting) Investigation (supporting) Writing - original draft (supporting) Writing - review & editing (supporting) Contribution: Conceptualization (lead) Formal analysis (supporting) Funding acquisition (equal) Project administration (supporting) Supervision (lead) Writing - original draft (supporting) Writing - review & editing (equal)

Nitrogen-heterocycle-based covalent organic frameworks (COFs) are considered promising candidates for the overall photosynthesis of hydrogen peroxide (H 2 O 2 ). However, the effects of the relative nitrogen locations remain obscured and photocatalytic performances of COFs need to be further improved. Herein, a collection of COFs functionalized by various diazines including pyridazine, pyrimidine, and pyrazine have been judiciously designed and synthesized for photogeneration of H 2 O 2 without sacrificial agents. Compared with pyrimidine and pyrazine, pyridazine embedded in TpDz tends to stabilize endoperoxide intermediate species, leading toward the more efficient direct 2e - oxygen reduction reaction (ORR) pathway. Benefiting from the effective electron-hole separation, low charge transfer resistance, and high-efficiency ORR pathway, an excellent production rate of 7327 μmol g −1 h −1 and a solar-to-chemical conversion (SCC) value of 0.62 % has been achieved by TpDz, which ranks one of the best COF-based photocatalysts. This work might shed fresh light on the rational design of functional COFs targeting photocatalysts in H 2 O 2 production.

关键词： Covalent Organic Frameworks Diazine Environmental Chemistry Hydrogen Peroxide Photocatalysis

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User Heterogeneity and Individualized Recommender

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Chinese Physics Letters 2017年第6期34卷 135-138页

作者：王庆先张君杰史晓雨尚明生 School of Information and Software Engineering University of Electronic Science and Technology of China Chongqing Key Laboratory of Big Data and Intelligent Computing Chongqing Institute of Green and Intelligent TechnologyChinese Academy of Sciences

Previous works on personalized recommendation mostly emphasize modeling peoples＇ diversity in potential fa- vorites into a uniform recommender. However, these recommenders always ignore the heterogeneity of users at an individual level. In this study, we propose an individualized recommender that can satisfy every user with a customized parameter. Experimental results on four benchmark datasets demonstrate that the individualized recommender can significantly improve the accuracy of recommendation. The work highlights the importance of the user heterogeneity in recommender design.

关键词： User Heterogeneity and Individualized Recommender

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Comparative Analysis of Context Based Classification of Twitter 4

Comparative Analysis of Context Based Classification of Twit...

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4th International Conference on Advances in Computing, Communication and Automation, ICACCA 2018

作者： Tiwana, Muhammad Salman Javeed, Farooq Lali, Muhammad Ikramullah Dar, Hafsa Bilal, Muhammad Dept. of CS and IT University of Sargodha Sargodha Pakistan Dept. of Computer Science University of Gujrat Gujrat Pakistan Dept. of Software Engineering University of Gujrat Gujrat Pakistan School of Computing and IT Taylor's University Subang Jaya Malaysia Centre for Data Science and Analytics Taylor's University Subang Jaya Malaysia

ISBN: (纸本)9781538671672

Social media offers online data source where internet users' share their opinions, views and discuss any news or events that happen around the world. Twitter is a popular social media which effectively takes part in any mega event and is used before, during and after live events. Some tweets become trend based on their popularity. The trending tweets are classified by twitter into categories like: Sports (S), Entertainment (E), Politics (P), and Technology (T) which are used in our work. We have used context based meanings to further improve the trending tweet classification results. In this article, we have verified the twitter's automated classification results with manual classification by experts. Furthermore, we compared the classification results with SVM, Linear Regression, Logistic Regression and Naive Bayes implemented in Weka tool. We found that twitter's classifier works with almost 89% accuracy in our dataset. This work would contribute in improving misclassification of data of different categories on social media. © 2018 IEEE.

关键词： Classification (of information)

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On the Mental Fatigue Analysis of SSVEP Entrainment

On the Mental Fatigue Analysis of SSVEP Entrainment

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International Conference on BioSignal Analysis, Processing and Systems (ICBAPS)

作者： Ramaswamy Palaniappan Surej Mouli Tugce Balli Ian McLoughlin Data Science Research Group School of Computing University of Kent Chatham UK Dept of Software Engineering Uskudar University Istanbul Turkey

Steady state visual evoked potential (SSVEP) has been employed significantly in various electrophysiological studies, most notably in the brain-computer interface (BCI) designs. While the standard approach of generating SSVEP is to use a 50% duty cycle pulse width modulation, i.e. with similar on and off periods of flashing, recent advancements in LED technology have allowed higher duty cycles such as 85% to be generated. While higher duty cycles are more successful in the entrainment and hence the improved response, it is unclear whether mental fatigue is also affected by a higher duty cycle. In this paper, we evaluate mental fatigue using a beta band energy analysis of electroencephalogram in five users while they visualise conventional 50% duty cycle SSVEP and 85% duty cycle SSVEP. Our results indicate that mental fatigue reduces with increased duty cycle and also confirms the comfort ratings by subjects, who report feeling more comfortable with the higher duty cycle.

关键词： Electroencephalography Visualization Fatigue Brain-computer interfaces Light emitting diodes Steady-state Pulse width modulation

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Dual Catalysis of Gold Nanoclusters: Photocatalytic Cross-Dehydrogenative Coupling by Cooperation of Superatomic Core and Molecularly Modified Staples**

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Angewandte Chemie 2023年第2期136卷

作者： Dr. Katsuhiro Isozaki Kenta Iseri Ryohei Saito Kyosuke Ueda Prof. Dr. Masaharu Nakamura International Research Center for Elements Science Institute for Chemical Research Kyoto University Uji Kyoto 611-0011 Japan Department of Energy and Hydrocarbon Chemistry Graduate School of Engineering Kyoto University Nishikyo-ku Kyoto 615-8510 Japan Contribution: Conceptualization (lead) Data curation (lead) Formal analysis (lead) Funding acquisition (equal) Methodology (lead) Project administration (lead) Resources (lead) Software (lead) Supervision (lead) Validation (lead) Visualization (lead) Writing - original draft (lead) Writing - review & editing (equal) Contribution: Investigation (lead) Methodology (lead) Writing - original draft (supporting) Contribution: Investigation (supporting) Methodology (supporting) Contribution: Investigation (supporting) Contribution: Funding acquisition (equal) Supervision (equal) Writing - review & editing (equal)

Thiolate-protected gold nanoclusters (AuNCs) have attracted significant attention as nano-catalysts, revealing a superatomic core and gold-thiolate staples as distinct structural units. Here, we demonstrate the unprecedented dual catalytic activity of thiolate-protected [Au 25 (SR) 18 ] − nanoclusters, involving both photosensitized 1 O 2 generation by the Au 13 superatomic core and catalytic carbon-carbon bond formation facilitated by Au 2 (SR) 3 staples. This synergistic combination of two different catalytic units enables efficient cross-dehydrogenative coupling of terminal alkynes and tertiary aliphatic amines to afford propargylamines in high yields of up to 93 %. Mixed-ligand AuNCs bearing both thiolate and alkynyl ligands revealed the intermediacy of the alkynyl-exchanged AuNCs toward both photosensitization and C−C bond-forming catalytic cycles. Density functional theory calculations also supported the intermediacy of the alkynyl-exchanged AuNCs. Thus, the use of ligand-protected metal nanoclusters has enabled the development of an exceptional multifunctional catalyst, wherein distinct nanocluster components facilitate cooperative photo- and chemo-catalysis.

关键词： Cross-Dehydrogenative Coupling Dual Catalysis Gold Nanocluster Intermolecular Interaction Photocatalyst

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Assignment-preference ant colony optimization for the two-echelon vehicle routing problem

IPPTA: Quarterly Journal of Indian Pulp and Paper Technical ...

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IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association 2018年第2期30卷 497-507页

作者： Yan, Xueming Hao, Zhifeng Huang, Han Li, Bi Jiang, Shengyi School of Information Science and Technology and School of Cyber Security Guangdong University of Foreign Studies China School of Mathematics and Big Data Foshan University China School of Software Engineering South China University of Technology China

Ant colony optimization (ACO) can be used to find approximate solutions to difficult optimization problems. Many implementations of ACO have been presented for a variety of combinatorial optimization problems. In this paper, we propose assignment-preference ant colony optimization (AP-ACO) to deal with the two-echelon vehicle routing problem (2E-VRP). 2E-VRP is a combinatorial optimization problem, where the delivery from a depot to the customers is managed by routing and consolidating the freight through satellites, and the objective is to minimize the total cost. Due to the uncertainty of satellite-to-customer assignment, it might be difficult for ACO to search for different routing subproblems. We introduce assignment preferences to ACO to provide solutions for 2E-VRP. A multi-player game is used to analyze the mutual relationships among routing subproblems to obtain assignment preferences for satellites and customers. Assignment preferences estimation, the pheromone updating rule, and solution construction are exploited to improve the search efficiency of the proposed algorithm. The computational results from three test sets with sizes ranging from 20 to 50 customers indicate the effectiveness and usefulness of the proposed algorithm for solving 2E-VRPs. © 2018 Indian Pulp and Paper Technical Association. All rights reserved.

关键词： Ant colony optimization

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