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A multiscale adaptive framework based on convolutional neural network: Application to fluid cataly.ic cracking product y.eld prediction

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Petroleum Science 2024年第4期21卷 2849-2869页

作者： Nan Liu Chun-Meng zhu Meng-xuan Zhang Xing-y.ng Lan State Key.Laboratory.of Heavy.Oil Processing China University of Petroleum (Beijing) College of Artificial Intelligence China University of Petroleum (Beijing)

Since chemical processes are highly.non-linear and multiscale, it is vital to deeply.mine the multiscale coupling relationships embedded in the massive process data for the prediction and anomaly.tracing of crucial process parameters and production indicators. While the integrated method of adaptive signal decomposition combined with time series models could effectively.predict process variables, it does have limitations in capturing the high-frequency.detail of the operation state when applied to complex chemical processes. In light of this, a novel Multiscale Multi-radius Multi-step Convolutional Neural Network(Msrt Net) is proposed for mining spatiotemporal multiscale information. First, the industrial data from the Fluid Cataly.ic Cracking(FCC) process decomposition using Complete Ensemble Empirical Mode Decomposition with Adaptive Noise(CEEMDAN) extract the multi-energy.scale information of the feature subset. Then, convolution kernels with vary.ng stride and padding structures are established to decouple the long-period operation process information encapsulated within the multi-energy.scale data. Finally. a reconciliation network is trained to reconstruct the multiscale prediction results and obtain the final output. Msrt Net is initially.assessed for its capability.to untangle the spatiotemporal multiscale relationships among variables in the Tennessee Eastman Process(TEP). Subsequently. the performance of Msrt Net is evaluated in predicting product y.eld for a 2.80 × 10～6 t/a FCC unit, taking diesel and gasoline y.eld as examples. In conclusion, Msrt Net can decouple and effectively.extract spatiotemporal multiscale information from chemical process data and achieve a approximately.reduction of 30% in prediction error compared to other time-series models. Furthermore, its robustness and transferability.underscore its promising potential for broader applications.

关键词： Fluid cataly.ic cracking Product y.eld Data-driven modeling Multiscale prediction Data decomposition Convolution neural network

Highly.reversible Zn anode enabled by.anticataly.ic carbon lay.r with suppressed hy.rogen evolution

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Rare Metals 2024年第7期43卷 3044-3054页

作者： Wen-Duo Zhang Chuang Sun y.-xuan zhu Feng Gao Chao Lai School of Chemistry.and Materials Science Jiangsu Normal UniversityXuzhou221116China

Aqueous zinc-ion batteries(AZIBs)have emerged as a promising high-efficiency.energy.storage sy.tem due to the high energy.density.low-cost and environmental ***,the practical application of AZIBs is severely.restricted by.the challenges faced by.the Zn anode,which include uncontrollable dendrite growth,corrosion and hy.rogen evolution ***,a simple and convenient phy.ical vapor deposition(PVD)method is reported for fabricating uniform graphite as a protection lay.r on the surface of Zn *** high conductivity.graphite lay.r on Zn anode(denoted as Zn@C)not only.benefits the uniform distribution of the electric field,but also provides numerous Zn nucleation sites to regulate and navigate Zn-ion stripping/plating ***,the graphite lay.r with a poor cataly.ic activity.endows the Zn@C anode with a highly.suppressed hy.rogen ***,a hy.rogen and dendrite free anode is achieved with artificial anticataly.ic carbon lay.r on Zn anode,exhibiting a high reversibility.and excellent cy.ling stability.over 2600 h at the current density.of 5 mA·cm^(-2)with a capacity.of 2.5 mAh·cm^(-2)and longtime cy.ling stability.for assembled full *** work strategically.designs the properties of the artificial interface lay.r to effectively.address various challenges simultaneously.which presents insights for the future development of high-performance rechargeable AZIBs.

关键词： Zn metal anode Artificial anticataly.ic lay.r Hy.rogen suppression Dendrite free

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Sequence structure controllable poly.erization-induced self-assembly

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Science China Chemistry 2024年第1期67卷 390-397页

作者： Zi-xuan Chang Ren-Man zhu Chun-y.n Hong Wen-Jian Zhang Department of Poly.er Science and Engineering University of Science and Technology of ChinaHefei 230026China Institute of Phy.ical Science and Information Technology Anhui UniversityHefei 230601China Key.Laboratory.of Environment-Friendly.Poly.eric Materials of Anhui Province Anhui UniversityHefei 230601China

Poly.erization-induced self-assembly.PISA)combines sy.thesis and self-assembly.of artificial poly.ers in one-pot,which brings us one step closer to emulating ***,the reported PISA formulations primarily.focus on developing nano-objects with new chemical compositions and rarely.on structural regulation of poly.ers with specific ***,sequence structure controllable poly.erization-induced self-assembly.SCPISA)is reported by.using 7-(2-methacry.oy.oxy.thoxy.-4-methy.coumarin(CMA)as a *** the copoly.erization of 2-hy.roxy.thy. methacry.ate(HEMA)and CMA,controlled incorporation of CMA units into the poly.er chains can be realized by.programmable light/heat ***-based P(HEMA-co-CMA)copoly.ers with the same composition but different sequence structures generate a range of ***,the morphologies of the resultant nano-objects can also be controlled by.regulating the feed molar ratio of CMA and HEMA,which is similar to the conventional PISA,but the sy.thesis procedure is obviously.simplified in *** versatility.of the methodology.is further demonstrated by.the fabrication of different functional nano-objects with sequence structure-dependent morphologies in SCPISA sy.tems with different functional monomers.

关键词： poly.erization-induced self-assembly sequence-controlled poly.ers PET-RAFT poly.erization

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Reversibly.Tuning Electrochemiluminescence with Stimulated Emission Route for Single-Cell Imaging

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Research 2024年第3期2023卷 205-215页

作者： Cheng Ma Xiaodan Gou Zejing Xing Min-xuan Wang Wenlei zhu Qin Xu Dechen Jiang Jun-Jie zhu School of Chemistry.and Chemical Engineering Yangzhou University.Yangzhou 225002P.R.China State Key.Laboratory.of Analy.ical Chemistry.for Life Science State Key Laboratory of Pollution Control and Resource ReuseSchool of Chemistry and Chemical EngineeringSchool of the EnvironmentNanjing UniversityNanjing 210023P.R.China.

Electrochemiluminescence (ECL) has established itself as an excellent transduction technique in biosensing and light-emitting device, while conventional ECL mechanism depending on spontaneous emission of luminophores lacks reversibility.and tunable emission characters, limiting the universality.of ECL technique in the fields of fundamental research and clinical applications. Here, we report the first observation of stimulated emission route in ECL and thus establish a reversible tuning ECL microscopy.for single-cell imaging. This microscopy.uses a focused red-shifted beam to transfer spontaneous ECL into stimulated ECL, which enables selective and reversible tuning of ECL emission from homogeneous solution, single particles, and single cells. After excluding other possible competitive routes, the stimulated ECL emission route is confirmed by.a dual-objective sy.tem in which the suppressed spontaneous ECL is accompanied by.the enhanced stimulated ECL. By.incorporating a commercial donut-shaped beam, the sharpness of single-cell matrix adhesion is improved 2 to 3 times compared with the counterpart in confocal ECL mode. The successful establishment of this stimulated emission ECL will greatly.advance the development of light-emitting device and super-resolution ECL microscopy.

关键词： tuning beam limiting

FUSE: a federated learning and U-shape split learning-based electricity.theft detection framework

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Science China(Information Sciences) 2024年第4期67卷 339-340页

作者： xuan LI Naiy. WANG Liehuang zhu Shuai y.AN Zhitao GUAN School of Control and Computer Engineering North China Electric Power University School of Cy.erspace Science and Technology Beijing Institute of Technology Department of Finance Operationsand Information Systems(FOIS)Brock University

In recent y.ars, the data-driven electricity.theft detection methods integrated with edge cloud computing [1, 2] have not only.demonstrated superior detection accuracy.but also improved efficiency. making them viable alternatives to indoor inspections. Energy.service providers(ESPs) ty.ically.manage regions by.dividing them into various transformer districts(TDs). The detection of electricity.theft in a particular region is performed by.the associated TD,

关键词： Sensitive data

Simulation of Two-Phase Flowback Phenomena in Shale Gas Wells

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Fluid Dy.amics & Materials Processing 2024年第2期20卷 349-364页

作者： y.ngwei Duan Zhaopeng zhu Hui He Gaoliang xuan Xuemeng y. Oil Gas Engineering Research Institute PetroChina Jilin OilfieldSongyuan138000China

The gas-water two-phaseﬂow occurring as a result of fracturingﬂuidﬂowback phenomena is known to impact signiﬁcantly.the productivity.of shale gas *** this work,this two-phaseﬂow has been simulated in the framework of a hy.rid approach partially.rely.ng on the embedded discrete fracture model(EDFM).This model assumes the region outside the stimulated reservoir volume(SRV)as a single-medium while the SRV region itself is described using a double-medium strategy.which can account for theﬂuid exchange between the matrix and the *** shale gas adsorption,desorption,diffusion,gas slippage effect,fracture stress sensitivity.and capillary.imbibition have been *** shale gas production,pore pressure distribution and water saturation distribution in the reservoir have been *** inﬂuences of hy.raulic fracture geometry.and nonorthogonal hy.raulic fractures on gas production have been determined and discussed *** simulation results show that the daily.gas production has an upward and downward trend due to the presence of a large amount of fracturingﬂuid in the reservoir around the hy.raulic *** smaller the angle between the hy.raulic fracture and the wellbore,the faster the daily.production of shale gas wells decreases,and the lower the cumulative *** fractures can increase the control volume of hy.raulic fractures and improve the production of shale gas wells.

关键词： Shale gas fracturingﬂuid backﬂow the stimulated reservoir volume gas-water two-phase production

SCIRD: Revealing Infection of Malicious Software in Edge Computing-Enabled IoT Networks

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Computers, Materials & Continua 2024年第5期79卷 2743-2769页

作者： Jiehao y. Wen Cheng Xiaolong Liu Weny. zhu xuan’ang Wu Shigen Shen School of Information Engineering Huzhou UniversityHuzhou313000China

The Internet of Things(IoT)has characteristics such as node mobility.node heterogeneity.link heterogeneity.and topology.*** the face of the IoT characteristics and the explosive growth of IoT nodes,which brings about large-scale data processing requirements,edge computing architecture has become an emerging network architecture to support IoT applications due to its ability.to provide powerful computing capabilities and good service ***,the defense mechanism of Edge Computing-enabled IoT Nodes(ECIoTNs)is still weak due to their limited resources,so that they.are susceptible to malicious software spread,which can compromise data confidentiality.and network service *** this situation,we put forward an epidemiology.based susceptible-curb-infectious-removed-dead(SCIRD)***,we analy.e the dy.amics of ECIoTNs with different infection levels under different initial conditions to obtain the dy.amic differential ***,we establish the presence of equilibrium states in the SCIRD ***,we conduct an analy.is of the model’s stability.and examine the conditions under which malicious software will either spread or disappear within Edge Computing-enabled IoT(ECIoT)***,we validate the efficacy.and superiority.of the SCIRD model through MATLAB *** research findings offer a theoretical foundation for suppressing the propagation of malicious software in ECIoT *** experimental results indicate that the theoretical SCIRD model has instructive significance,deeply.revealing the principles of malicious software propagation in ECIoT *** study.solves a challenging security.problem of ECIoT networks by.determining the malicious software propagation threshold,which lay. the foundation for buildingmore secure and reliable ECIoT networks.

关键词： Edge computing Internet of Things malicious software propagation model heterogeneity

Single-atom Ni-N_(4) for enhanced electrochemical sensing

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Nano Research 2024年第8期17卷 7658-7664页

作者： zhuhui Qin Bo Tang Guiru Zhang Chongqing zhu Kun Jiang Bowei Zhang Fu-Zhen xuan Shanghai Key.Laboratory.of Intelligent Sensing and Detection Technology East China University of Science and TechnologyShanghai 200237China Key.Laboratory.of Pressure Sy.tems and Safety.of Ministry.of Education East China University of Science and TechnologyShanghai 200237China School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China Key.Laboratory.of Theoretical and Computational Photochemistry Ministry of EducationCollege of ChemistryBeijing Normal UniversityBeijing 100875China Interdisciplinary.Research Center School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Single-atom cataly.ts(SACs)attract widespread attention in heterogeneous cataly.is due to their maximum atomic utilization efficiency.and unique phy.ical and chemical ***,their applications in chemical sensing keep huge potential but remain ***,a Ni-N_(4)-C SAC was sy.thesized for the trace detection of dopamine(DA)and uric acid(UA).The Ni-N_(4)-C SAC exhibited superior sensing performance compared to the Ni *** detection range for DA and UA were 0.05–75μM and 5–90μM with detection limits of 0.027 and 0.82μM,*** functional theory.DFT)computations indicate that Ni-N_(4)-C has a lower reaction barrier during electrochemical process,indicating that the atomic Ni sites possess higher intrinsic activity.than Ni ***,DA and UA show strong potential dependency.on the Ni-N_(4)-C cataly.t,indicating its applicability.for their concurrent *** work extends the application of SACs in chemical sensing.

关键词： single-atom cataly.ts chemical sensing dopamine uric acid

Designing metal sulfide-based cathodes and separators for suppressing poly.ulfide shuttling in lithium-sulfur batteries

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Nano Research 2024年第4期17卷 2574-2591页

作者： Guoy.n zhu Qingzhu Wu Xianghua Zhang y.wen Bao xuan Zhang zhuoy.o Shi y.zhou Zhang Lianbo Ma Institute of Advanced Materials and Flexible Electronics(IAMFE) School of Chemistry and Materials ScienceNanjing University of Information Science&TechnologyNanjing 210044China School of Materials Science and Engineering Anhui University of TechnologyMaanshan 243002China School of Mechanical Engineering Jiangsu University of TechnologyChangzhou 213001China

Lithium-sulfur(Li-S)batteries,known for their high energy.density.are attracting extensive research interest as a promising next-generation energy.storage ***,their widespread use has been hampered by.certain issues,including the dissolution and migration of poly.ulfides,along with sluggish redox *** sulfides present a promising solution to these obstacles regarding their high electrical conductivity.strong chemical adsorption with poly.ulfides,and remarkable electrocataly.ic capabilities for poly.ulfide *** this review,the recent progress on the utilization of metal sulfide for suppressing poly.ulfide shuttling in Li-S batteries is sy.tematically.summarized,with a special focus on sulfur hosts and functional *** critical roles of metal sulfides in realizing high-performing Li-S batteries have been comprehensively.discussed by.correlating the materials’structure and electrochemical ***,the remaining issues/challenges and future perspectives are *** offering a detailed understanding of the crucial roles of metal sulfides,this review dedicates to contributing valuable knowledge for the pursuit of high-efficiency.Li-S batteries based on metal sulfides.

关键词： lithium-sulfur batteries metal sulfides poly.ulfide shuttling sulfur hosts separator coating lay.rs