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A hybrid spatial-temporal deep learning prediction model of industrial methanol-to-olefins process

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Frontiers of Chemical Science and Engineering 2024年第4期18卷 73-85页

作者： Jibin Zhou Xue Li Duiping Liu Feng wang Tao Zhang Mao Ye Zhongmin Liu National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China yulin Innovation institute for Clean Energy Clean Energy Innovation Institute of Chinese Academy of SciencesYulin 719053China Xuelang Industrial Intelligence Technology Co. Ltd.Wuxi 214000China

Methanol-to-olefins,as a promising non-oil pathway for the synthesis of light olefins,has been successfully *** accurate prediction of process variables can yield significant benefits for advanced process control and *** challenge of this task is underscored by the failure of traditional methods in capturing the complex characteristics of industrial processes,such as high nonlinearities,dynamics,and data distribution shift caused by diverse operating *** this paper,we propose a novel hybrid spatial-temporal deep learning prediction model to address these ***,a unique data normalization technique called reversible instance normalization is employed to solve the problem of different data ***,convolutional neural network integrated with the self-attention mechanism are utilized to extract the temporal ***,a multi-graph convolutional network is leveraged to model the spatial ***,the extracted temporal and spatial features are fused as input into a fully connected neural network to complete the ***,the outputs are denormalized to obtain the ultimate *** monitoring results of the dynamic trends of process variables in an actual industrial methanol-to-olefins process demonstrate that our model not only achieves superior prediction performance but also can reveal complex spatial-temporal relationships using the learned attention matrices and adjacency matrices,making the model more ***,this model is deployed onto an end-to-end Industrial Internet Platform,which achieves effective practical results.

关键词： methanol-to-olefins process variables prediction spatial-temporal self-attention mechanism graph convolutional network

High-Energy Batteries:Beyond Lithium-Ion and Their Long Road to Commercialisation

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Nano-Micro Letters 2022年第6期14卷 116-164页

作者： yulin Gao Zhenghui Pan Jianguo Sun Zhaolin Liu John wang Department of Materials Science and Engineering National University of SingaporeSingapore 117574Singapore ST Engineering Advanced Material Engineering Pte.Ltd. Singapore 619523Singapore institute of Materials Research and Engineering Agency for ScienceTechnology and Research(A*STAR)Singapore 138634Singapore School of Materials Science and Engineering Tongji UniversityShanghai 201804China

Rechargeable batteries of high energy density and overall performance are becoming a critically important technology in the rapidly changing society of the twenty-first *** lithium-ion batteries have so far been the dominant choice,numerous emerging applications call for higher capacity,better safety and lower costs while maintaining sufficient *** design space for potentially better alternatives is extremely large,with numerous new chemistries and architectures being simultaneously *** include other insertion ions(*** and numerous multivalent ions),conversion electrode materials(***,metallic anodes,halides and chalcogens)and aqueous and solid ***,each of these potential“beyond lithium-ion”alternatives faces numerous challenges that often lead to very poor cyclability,especially at the commercial cell level,while lithium-ion batteries continue to improve in performance and decrease in *** review examines fundamental principles to rationalise these numerous developments,and in each case,a brief overview is given on the advantages,advances,remaining challenges preventing cell-level implementation and the state-of-the-art of the solutions to these ***,research and development results obtained in academia are compared to emerging commercial examples,as a commentary on the current and near-future viability of these“beyond lithium-ion”alternatives.

关键词： High energy density Beyond lithium-ion batteries Multivalent-ion batteries Conversion electrode materials Electrolyte

LATIN AMERICA:POST-COLD WAR DIPLOMATIC TRENDS

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Contemporary International Relations 1995年第2期5卷 13-23页

作者： wang yulin Research Professor,Director,{2. & the World Division,{2. institute of Contemporary International Relations.

Remarkable adjustments in foreign policy have been made hy the 33 LatinAmerican countries,the major influential ones in particular,since the adventof the *** inperative for making drastic policy adjustments originates fromthe urgent need to meet the challenges resulting from the end of the Cold War andthe transformed world power balance.

关键词： LATIN AMERICA US

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对生态屏障概念内涵与价值的认识

山地学报 2005年第4期23卷 4431-4436页

作者：王玉宽孙雪峰邓玉林彭培好范建容中国科学院水利部成都山地灾害与环境研究所国家环保总局对外合作中心四川农业大学成都理工大学中国科学院水利部成都山地灾害与环境研究所四川成都610041 北京100035 四川雅安62.000 四川成都610059

“生态屏障”概念源于我国生态环境建设实践。学术界对此概念的科学内涵和价值进行了有益的探讨,但目前还尚未形成统一的认识。本文通过对生态屏障概念的理论与实践基础的分析,在总结前人研究成果的基础上,提出了对生态屏障概念的新的... 详细信息

“生态屏障”概念源于我国生态环境建设实践。学术界对此概念的科学内涵和价值进行了有益的探讨,但目前还尚未形成统一的认识。本文通过对生态屏障概念的理论与实践基础的分析,在总结前人研究成果的基础上,提出了对生态屏障概念的新的认识和理解,认为生态屏障就是指“处于某一特定区域的生态系统,其结构与功能符合人类生存和发展的生态要求”。在此基础上对生态屏障的社会实践意义和科学价值进行了探讨,认为生态屏障概念提出的科学价值在于它丰富和拓展了生态系统生态学的内容,促进了恢复生态学理论的发展,同时对生态系统服务功能评价提出了新的要求;其社会实践意义表现在生态屏障概念的提出强调了人与生态环境的关系,明确了生态环境建设的目标;强调了区域性和时序性原则,为生态环境建设规划与实施提供了决策指南,为生态环境建设实践中实施系统工程和长远布局提出了更高的决策目标。

关键词：生态屏障内涵生态系统

柳芽粗多糖超声辅助提取工艺优化及抗氧化活性分析

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饲料工业 2024年第3期45卷 82-87页

作者：范露露陈渝林孙旭张鹏王超刘青春沈阳工学院生命工程学院辽宁抚顺113122 辽宁农业职业技术学院辽宁营口115009 济南市畜牧技术推广站山东济南250306

为了优化柳芽粗多糖(crude polysaccharide of willow bud,CPW)提取工艺并考察其体外抗氧化活性,试验采用超声辅助水提醇沉法提取柳芽粗多糖,并运用响应面分析法进行优化;以维生素C(vitamin C,VC)为对照,通过比色法检测其总抗氧化能力... 详细信息

为了优化柳芽粗多糖(crude polysaccharide of willow bud,CPW)提取工艺并考察其体外抗氧化活性,试验采用超声辅助水提醇沉法提取柳芽粗多糖,并运用响应面分析法进行优化;以维生素C(vitamin C,VC)为对照,通过比色法检测其总抗氧化能力、清除1,1-二苯基-2.三硝基苯肼(1,1-diphenyl-2.picrylhydrazyl,DPPH)自由基(DPPH·)以及抑制超氧阴离子自由基(O_(2.^(-)·)和羟自由基(·OH)的能力,评价CPW体外抗氧化效果。结果表明:CPW最佳提取工艺为液料比70∶1(mL/g),水浴温度56℃,超声功率440 W;采用该提取工艺对CPW的提取率达到6.6%。不同浓度CPW能够有效清除DPPH·和抑制·OH和O_(2.^(-)·的产生。说明优化的CPW超声辅助提取工艺切实可行,且所提取的CPW抗氧化能力较好。

关键词：柳芽粗多糖超声波提取抗氧化活性

Hybrid ion/electron interfacial regulation stabilizes the cobalt/oxygen redox of ultrahigh-voltage lithium cobalt oxide for fast-charging cyclability

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Science Bulletin 2024年第13期69卷 2071-2079页

作者： Zhihong Bi Anping Zhang Gongrui wang Cong Dong Pratteek Das Xiaoyu Shi Zhong-Shuai Wu State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of chinese academy of sciences Beijing 100049China Dalian National Laboratory of Clean Energy Chinese Academy of SciencesDalian 116023China

High-voltage and fast-charging LiCoO_(2.(LCO)is key to high-energy/power-density Li-ion ***,unstable surface structure and unfavorable electronic/ionic conductivity severely hinder its high-voltage fast-charging ***,we construct a Li/Na-B-Mg-Si-O-F-rich mixed ion/electron interface network on the 4.65 V LCO electrode to enhance its rate capability and long-term cycling ***,the resulting artificial hybrid conductive network enhances the reversible conversion of Co^(3+)/^(4+)/O_(2./nredox by the interfacial ion–electron cooperation and suppresses interface side reactions,inducing an ultrathin yet compact cathode electrolyte ***,the derived near-surface Na+/Mg2./Si^(4+)-pillared local intercalation structure greatly promotes the Li^(+)diffusion around the 4.55 V phase transition and stabilizes the cathode ***,excellent 3 C(1 C=2.4 mA g1)fast charging performance is demonstrated with 73.8%capacity retention over 1000 *** findings shed new insights to the fundamental mechanism of interfacial ion/electron synergy in stabilizing and enhancing fast-charging cathode materials.

关键词： High-voltage Fast-charging LiCoO_(2. Interfacial ion-electron cooperation Local intercalation

供水管网系统中DOM解析与DBPs生成特征

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净水技术 2024年第6期43卷 63-70页

作者：王远陆纳新汪鹏唐玉霖王慕同济大学环境科学与工程学院上海200092 无锡市锡山区应急管理局江苏无锡214100 无锡市政公用环境检测研究院有限公司江苏无锡214100 长江南京航道工程局江苏南京210000

为保障城市供水安全,实现南方某市优质饮用水入户,通过对目前供水管网水质情况进行调查分析,明确供水管网系统中溶解性有机物(DOM)在不同季节、余氯及停留时间等参数条件下对消毒副产物(DBPs)生成情况的影响。研究表明:供水管网系统中... 详细信息

为保障城市供水安全,实现南方某市优质饮用水入户,通过对目前供水管网水质情况进行调查分析,明确供水管网系统中溶解性有机物(DOM)在不同季节、余氯及停留时间等参数条件下对消毒副产物(DBPs)生成情况的影响。研究表明:供水管网系统中常规水质指标如浑浊度、余氯和溶解性有机物主要取决于出厂水的浓度,供水管网中余氯变化较大,在管道中进行补氯有利于提升供水管网中不利点的居民饮用水安全。紫外和荧光光谱分析方法在供水管道中检测方便、检测限较低且不受其他工艺影响且检测浓度较低,可有效指示供水管道中存在的异常风险。三氯甲烷与卤乙酸是供水管网系统中主要存在的DBPs,其生成受到出厂水水质、管道、管道距离及季节性等多因素的影响,在供水管线中的含量变为随管线距离增长而增大;在温度较高的季节DBPs生成浓度高、反应速度快,应受到重点关注。

关键词：供水管网溶解性有机物消毒副产物余氯荧光光谱

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山地城市合流制溢流污染控制措施研究

给水排水 2024年第4期50卷 70-75页

作者：刘硕王通范科文程玉林张占文姚玉健北京市市政工程设计研究总院有限公司北京100082

聚焦山地城市合流制溢流污染问题,以实际工程为例,梳理山地城市排水特点,明确工作目标,详细分析问题与成因,全面对比完全雨污分流与截流调蓄方案,因地制宜采取简单高效的治理措施,形成合理的CSO控制技术路线。给出近远期结合的治理方案... 详细信息

聚焦山地城市合流制溢流污染问题,以实际工程为例,梳理山地城市排水特点,明确工作目标,详细分析问题与成因,全面对比完全雨污分流与截流调蓄方案,因地制宜采取简单高效的治理措施,形成合理的CSO控制技术路线。给出近远期结合的治理方案,结合模型模拟验证方案的可行性,实现减少溢流频次和削减入河污染物的目的,最终达到控制目标。

关键词：山地城市合流制溢流调蓄池考核断面

Pressure-Tunable Large Anomalous Hall Effect in Ferromagnetic Metal LiMn_(6)Sn_(6)

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chinese Physics Letters 2024年第5期41卷 69-76页

作者：高玲玲赖俊文陈栋裴翠颖王琦赵毅李昌华曹渭征吴珏霏陈宇林陈星秋孙岩 Claudia Felser 齐彦鹏 School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Max Planck institute for Chemical Physics of Solids Dresden 01187Germany College of Physics Qingdao UniversityQingdao 266071China ShanghaiTech Laboratory for Topological Physics ShanghaiTech UniversityShanghai 201210China Department of Physics Clarendon LaboratoryUniversity of OxfordParks RoadOxford OX13PUUK School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shanghai Key Laboratory of High-resolution Electron Microscopy ShanghaiTech UniversityShanghai 201210China

Recently, giant intrinsic anomalous Hall effect(AHE) has been observed in the materials with kagome ***, we systematically investigate the influence of high pressure on the AHE in the ferromagnet LiMn_(6)Sn_(6) with clean Mn kagome lattice. Our in situ high-pressure Raman spectroscopy indicates that the crystal structure of LiMn_(6)Sn_(6) maintains a hexagonal phase under high pressures up to 8.51 GPa. The anomalous Hall conductivity(AHC) σ_(xy)^(A) remains around 150 Ω^(-1)·cm^(-1), dominated by the intrinsic mechanism. Combined with theoretical calculations, our results indicate that the stable AHE under pressure in Li Mn_(6)Sn_(6) originates from the robust electronic and magnetic structure.

关键词： structure mechanism intrinsic