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data driven discovery of an analytic formula for the life prediction of Lithium-ion batteries

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Progress in Natural Science:Materials International 2022年第6期32卷 793-799页

作者： Jie Xiong Tong-Xing Lei da-meng Fu Jun-Wei Wu Tong-Yi zhang School of Materials Science and Engineering Harbin Institute of Technology Hong Kong University of Science and Technology (Guangzhou)

Predicting the cycle life of Lithium-Ion Batteries(LIBs) remains a great challenge due to their complicated degradation *** present work employs an interpretative machine learning of symbolic regression(SR) to discover an analytic formula for LIB life prediction with newly defined *** novel features are based on the discharging energies under the constant-current(CC) and constant-voltage(CV) modes at every five cycles *** cycle life is affected by the CC-discharging energy at the 15th cycle(E15-CCD) and the difference between the CC-discharging energies at the 45th cycle and 95th cycle(Δ45-95).The cycle life highly correlates with a simple indicator(E15-CCD-3)/Δ45-95with a Pearson correlation coefficient of *** machine learning tools provide a rapid and accurate prediction of cycle life at the early stage.

关键词： Symbolic regression Machine learning Cycle life prediction Lithium-ion batteries

Flex Ethernet Technology and Application in 5G Mobile Transport Network

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China Communications 2021年第2期18卷 250-258页

作者： meng zhang Research Institute of Telecommunications Transmission(RITT) China Academy of Information Communications Technology(CAICT)MIITBeijing 100191China

With the advent of 5G era,the rise of cloud services,virtual reality/virtual reality(AR/VR),vehicle networking and other technologies has put forward new requirements for the bandwidth and delay of the bearer *** Ethernet technology cannot meet the new requirements very *** Ethernet(FlexE)technology has emerged as the times *** paper introduces the background,standardization process,functional principle,application mode and technical advantages of FlexE technology,and finally analyses its application prospects and shortcomings in 5G mobile transport network.

关键词： Flex Ethernet(FlexE) 5G mobile transport network network slicing

Size-controllable synthesis and high-performance formic acid oxidation of polycrystalline Pd nanoparticles

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Rare Metals 2019年第2期38卷 115-121页

作者： Hui-Hui Wang Jin-Feng zhang Ze-Lin Chen meng-meng zhang Xiao-Peng Han Cheng Zhong Yi-da Deng Wen-Bin Hu Tianjin Key Laboratory of Composites and Functional Materials and Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) Tianjin University

A facile approach was developed for the synthesis of polycrystalline palladium nanoparticles(Pd NPs)by using tannic acid(TA) as green reagent and stabilizer in a 30 ℃ water bath. The size of Pd NPs can be tuned in a range of 10–60 nm simply by adjusting the concentration of Pd precursor. The catalytic activity and stability of the as-obtained Pd NPs toward formic acid oxidation were analyzed. It is found that these Pd NPs with different sizes exhibit size-dependent and enhanced formic acid oxidation performance compared to the commercial Pd black catalyst. It should be noted that the Pd catalysts with an average size of 24 nm demonstrate the best catalytic activity and stability among the other prepared Pd NPs, which can be ascribed to its larger electrochemical surface area(ECSA)and polycrystalline structure with defects.

关键词： Polycrystalline palladium nanoparticle Size controllable Tannic acid: Room temperature Formic acid oxidation

A Highly Regioselective Deacetylation of Taxanes

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Chinese Chemical Letters 2002年第6期13卷 501-504页

作者： meng zhang da Li YIN Ji Yu GUO Xiao Tian LIANG Institute of Materia Medica Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100050

A highly regioselective O-deacetylation of taxanes at C-5 position was accomplished by treatment with t-BuOK and a possible mechanism was proposed.

关键词： Paclitaxel taxane deacetylation.

Fundamental Trackability Problems for Iterative Learning Control

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IEEE/CAA Journal of Automatica Sinica 2023年第10期10卷 1933-1950页

作者： Deyuan meng Jingyao zhang Seventh Research Division Beihang University(BUAA)Beijing 100191China School of Automation Science and Electrical Engineering Beihang University(BUAA)Beijing 100191China

Generally, the classic iterative learning control(ILC)methods focus on finding design conditions for repetitive systems to achieve the perfect tracking of any specified trajectory,whereas they ignore a fundamental problem of ILC: whether the specified trajectory is trackable, or equivalently, whether there exist some inputs for the repetitive systems under consideration to generate the specified trajectory? The current paper contributes to dealing with this problem. Not only is a concept of trackability introduced formally for any specified trajectory in ILC, but also some related trackability criteria are established. Further, the relation between the trackability and the perfect tracking tasks for ILC is bridged, based on which a new convergence analysis approach is developed for ILC by leveraging properties of a functional Cauchy sequence(FCS). Simulation examples are given to verify the effectiveness of the presented trackability criteria and FCS-induced convergence analysis method for ILC.

关键词： Convergence functional Cauchy sequence(FCS) iterative learning control(ILC) trackability

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Robust Optimization-Based Iterative Learning Control for Nonlinear Systems With Nonrepetitive Uncertainties

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IEEE/CAA Journal of Automatica Sinica 2021年第5期8卷 1001-1014页

作者： Deyuan meng Jingyao zhang the Seventh Research Division Beihang University(BUAA)Beijing 100191 the School of Automation Science and Electrical Engineering Beihang University(BUAA)Beijing 100191

This paper aims to solve the robust iterative learning control(ILC)problems for nonlinear time-varying systems in the presence of nonrepetitive uncertainties.A new optimization-based method is proposed to design and analyze adaptive ILC,for which robust convergence analysis via a contraction mapping approach is realized by leveraging properties of substochastic *** is shown that robust tracking tasks can be realized for optimization-based adaptive ILC,where the boundedness of system trajectories and estimated parameters can be ensured,regardless of unknown time-varying nonlinearities and nonrepetitive *** simulation tests,especially implemented for an injection molding process,demonstrate the effectiveness of our robust optimization-based ILC results.

关键词： Adaptive iterative learning control(ILC) nonlinear time-varying system robust convergence substochastic matrix

Core activated sludge communities are influenced little by immigration:Case study of a membrane bioreactor plant

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Journal of Environmental Sciences 2021年第4期33卷 244-255页

作者： Shaoqing zhang Fangang meng School of Civil Engineering Guangzhou UniversityGuangzhou 510006China School of Environmental Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Sun Yat-sen UniversityGuangzhou 510275China

Microbial immigrants arriving with influent wastewater may influence activated sludge(AS)***,the extent to which immigration impacts AS communities is still *** explore the intensity of immigration impact,we used sequencing technology to track the raw wastewater and AS communities from a membrane bioreactor plant over a 12-month *** first distinguished core populations from peripheral ones in both raw wastewater and AS based on their occurrence frequency and *** results showed that core OTUs(≥80%occurrence frequency)made up a large fraction(>90%)of total sequences,while peripheral OTUs composed the majority of all detected OTUs but merely occupied a few sequences.A significant difference in core communities between the influent and AS was found,as well as between the compositions of core and peripheral ***,the persistent functional bacteria of AS,although not numerically dominant,accounted for 96.24%of the total sequences related to nutrient turnover,suggesting the presence of a small number of longstanding and core functional bacteria in the AS ***,64%of the 5188 OTUs in AS,which accounted for 91.51%of the sequences,exhibited positive growth rates,which suggested that their apparent abundances were due to growth within the plant,not from *** together,these results demonstrated that the impact of influent populations on core AS communities was ***,this work provides quantitative insights into the impact of immigration,which is expected to advance our understanding of the AS community assembly.

关键词： Membrane bioreactor Activated sludge Core community Active population Immigration impact

COOPERATIVE GAMES ON CONVEX GEOMETRIES WITH A COALITION STRUCTURE

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Journal of Systems Science & Complexity 2012年第5期25卷 909-925页

作者： Fanyong meng Qiang zhang School of Management Qingdao Technological University School of Management and Economics Beijing Institute of Technology

This paper is mainly to discuss cooperative games on convex geometries with a coalition structure, which can be seen as an extension of cooperative games with a coalition structure. For this kind of games, the cooperation among unions and within each union will be the convex sets, i.e., the feasible subsets of the coalition structure and that of each union belong to a convex geometry, respectively. The explicit form of the generalized Owen value for this kind of games is given, which can be seen as an extension of the Owen value. Eklrthermore, two special cases of this kind of games are researched. The corresponding davoff indices are also stHdied. Fin~.llv ~n ilhl^r~＇i, ~r^l~ to ~

关键词： Coalition structure convex geometry cooperative game generalized Owen value gener-alized symmetric coalitional Banzhaf value.

De Lellis-Topping type inequalities on smooth metric measure spaces

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Frontiers of Mathematics in China 2018年第1期13卷 147-160页

作者： meng meng Shijin zhang School of Mathematics and Systems Science Beihang University Beijing 100191 China

We obtain some De Lellis-Topping type inequalities on the smootla metric measure spaces, some of them are as generalization of De Lellis-Topping type inequality that was proved by X. Cheng [Ann. Global Anal. Geom., 20... 详细信息

关键词： De Lellis-Topping type inequality Bakry-Emery Ricci curvature,smooth metric measure space