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Development and application of an intelligent thermal state monitoring system for sintering machine tails based on CNN-LSTM hybrid neural networks

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Journal of Iron and Steel Research International 2025年第1期32卷 52-63页

作者： Da-lin Xiong Xin-yu zhang Zheng-wei Yu Xue-feng zhang hong-ming Long Liang-jun chen Anhui Province Key Laboratory of Metallurgical Engineering&Resources Recycling Anhui University of TechnologyMa’anshan243002AnhuiChina School of Metallurgical Engineering Anhui University of TechnologyMa’anshan243032AnhuiChina School of Computer Science Anhui University of TechnologyMa’anshan243032AnhuiChina

Real-time prediction and precise control of sinter quality are pivotal for energy saving,cost reduction,quality improvement and efficiency enhancement in the ironmaking *** advance,the accuracy and comprehensiveness of sinter quality prediction,an intelligent flare monitoring system for sintering machine tails that combines hybrid neural networks integrating convolutional neural network with long short-term memory(CNN-LSTM)networks was *** system utilized a high-temperature thermal imager for image acquisition at the sintering machine tail and employed a zone-triggered method to accurately capture dynamic feature images under challenging conditions of high-temperature,high dust,and *** feature images were then segmented through a triple-iteration multi-thresholding approach based on the maximum between-class variance method to minimize detail loss during the segmentation *** the advantages of CNN and LSTM networks in capturing temporal and spatial information,a comprehensive model for sinter quality prediction was constructed,with inputs including the proportion of combustion layer,porosity rate,temperature distribution,and image features obtained from the convolutional neural network,and outputs comprising quality indicators such as underburning index,uniformity index,and FeO content of the *** accuracy is notably increased,achieving a 95.8%hit rate within an error margin of±*** the system is applied,the average qualified rate of FeO content increases from 87.24%to 89.99%,representing an improvement of 2.75%.The average monthly solid fuel consumption is reduced from 49.75 to 46.44 kg/t,leading to a 6.65%reduction and underscoring significant energy saving and cost reduction effects.

关键词： Sinter quality Convolutional neural network Long short-term memory Image segmentation FeO prediction

Recent progress on photoactive nonprecious transition-metal complexes

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Science China Chemistry 2025年第1期68卷 46-95页

作者： Zhong-Liang Gong hong-Jie zhang Yan cheng Jianxun Liu Yuhan Ai Yaqin Li Zhihui feng Qiong zhang Shaolong Gong Yong chen Chang-Jiang Yao yuan-yuan Zhu Liang-Jin Xu Yu-Wu Zhong CAS Key Laboratory of Photochemistry Institute of ChemistryChinese Academy of SciencesBeijing 100190China State Key Laboratory of Structural Cemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of TechnologyHefei 230009China State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic MaterialsWuhan UniversityWuhan 430072China School of Chemistry and Chemical Engineering Anhui UniversityHefei 230601China Key Laboratory of Photochemical Conversion and Optoelectronic Materials&CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Photoactive complexes of nonprecious transition metals,mainly including those in the first-row and partially the second-row of the Periodic table of elements,have received increasing attention in view of their low cost and long-term *** are recognized as promising alternatives to noble transition metal complex congeners that have been extensively studied in optoelectronic devices,artificial photosynthesis,photocatalysis,biodiagnostics,and therapeutics,*** review is devoted to a comprehensive summary on the classical and recent advances on photoactive nonprecious transition metal complexes,including photoactive Zr,V,Cr,Mo,and W complexes,Mn complexes and hybrids,Fe,Co,Ni,and Cu complexes,and Zn and Cd complexes and hybrids.A particular focus is given on the molecular design,modulation of photophysical and photochemical properties,and applications of the representative and lately-developed nonprecious metal *** addition,a perspective on the future development in this field is provided at the end of this review.

关键词： photoactive metal complexes earth-abundant metals nonprecious metal complexes luminescence photochemistry

Precision storage lifetime measurements of highly charged heavy ions in the CSRe storage ring using a Schottky resonator

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Nuclear Science and Techniques 2025年第1期36卷 150-160页

作者： Qian Wang Xin-Liang Yan Guang-Yu Zhu Shahab Sanjari Li-jun Mao He Zhao Yuri ALitvinov Rui-Jiu chen Meng Wang Yu-Hu zhang You-Jin yuan jun-Xia Wu hong-Yang Jiao Yue Yu Zu-Yi chen Yin-Fang Luo Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China GSI Helmholtzzentrum für Schwerionenforschung Planckstrasse 164291 DarmstadtGermany FH Aachen University of Applied Sciences Heinrich-Mussmann-Str.152428 JülichGermany

Schottky mass spectrometry utilizing heavy-ion storage rings is a powerful technique for the precise mass and decay half-life measurements of highly charged *** to the nondestructive ion detection features of Schottky noise detectors,the number of stored ions in the ring is determined by the peak area in the measured revolution frequency *** of their intrinsic amplitude-frequency characteristic(AFC),Schottky detector systems exhibit varying sensitivities at different *** low-energy electron-cooled stored ions,a new method is developed to calibrate the AFC curve of the Schottky detector system of the Experimental Cooler Storage Ring(CSRe)storage ring located in Lanzhou,*** the amplitude-calibrated frequency spectrum,a notable refinement was observed in the precision of both the peak position and peak *** a result,the storage lifetimes of the electron-cooled fully ionized^(56)Fe^(26+)ions were determined with high precision at beam energies of 13.7 and 116.4 MeV/u,despite of frequency drifts during the *** electron cooling was turned off,the effective vacuum condition experienced by the 116.4 MeV/u^(56)Fe^(26+)ions was determined using amplitude-calibrated spectra,revealing a value of 2×10^(−10)mbar,which is consistent with vacuum gauge readings along the CSRe *** method reported herein will be adapted for the next-generation storage ring of the HIAF facility under construction in Huizhou,*** can also be adapted to other storage ring facilities worldwide to improve precision and enhance lifetime measurements using many ions in the ring.

关键词： Lifetime measurement Schottky mass spectrometry Sensitivity response Highly charged heavy ion Resonator UH vacuum Nondestructive diagnostics

A supramolecular formulation of icariin@sulfonatoazocalixarene for hypoxia-targeted osteoarthritis therapy

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Chinese Chemical Letters 2025年第1期36卷 267-271页

作者： Chao zhang Ai-feng Liu Shihui Li Fang-yuan chen jun-Tao zhang Fang-Xing Zeng Hui-Chuan feng Ping Wang Wen-Chao Geng Chuan-Rui Ma Dong-Sheng Guo Orthopedics department First Teaching Hospital of Tianjin University of Traditional Chinese MedicineTianjin 300380China Orthopedics department National Clinical Research Center for Chinese Medicine Acupuncture and MoxibustionTianjin 300380China College of Chemistry State Key Laboratory of Elemento-Organic ChemistryKey Laboratory of Functional Polymer Materials(Ministry of Education)Frontiers Science Center for New Organic MatterCollaborative Innovation Center of Chemical Science and Engineering(Tianjin)Nankai UniversityTianjin 300071China

Osteoarthritis(OA)is the most prevalent joint disease and icariin is a promising drug for its ***,the clinical use of icariin is hindered by poor water solubility,low bioavailability,and nonspecific release and biological ***,sulfonated azocalix[4]arene(SAC4A)with enhanced water solubility,recognition capacity,and designed responsiveness was used to improve the efficiency of icariin for OA ***4A,a macrocycle with well-defined molecular weight and structure,could encapsulate and enhance water solubility of various *** addition,SAC4A enables hypoxia-responsive release of loaded *** with icariin treatment,supramolecular complex icariin@SAC4A significantly relieved OA symptoms of rats,including more regular bone morphology and structure,and lower degree of cartilage ***,the supramolecular formulation demonstrated various advantages,including easy preparation,hypoxia-triggered release,and small size that conducive to drug penetration.

关键词： Biomaterial Supramolecular chemistry Calixarene Icariin Osteoarthritis

Efficient chemical mechanical polishing of W promoted by Fenton-like reaction between Cu^(2+)and H_(2)O_(2)

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Transactions of Nonferrous Metals Society of China 2025年第1期35卷 257-270页

作者： hong-yu chen Lin WANG feng PENG Meng-meng SHEN Wei HANG Tufa Habtamu BERI Hui-bin zhang jun ZHAO Yun-xiao HAN Bing-hai LÜ College of Mechanical Engineering Zhejiang University of TechnologyHangzhou 310023China Key Laboratory of Special Purpose Equipment and Advanced Processing Technology Ministry of EducationZhejiang University of TechnologyHangzhou 310023China Adama Science and Technology University Adama 1888Ethiopia College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China

The Fenton-like reaction between Cu^(2+)and H_(2)O_(2)was employed in chemical mechanical polishing to achieve efficient and high-quality processing of *** microstructure evolution and material removal rate of tungsten during polishing process were investigated via scanning electron microscopy,X-ray photoelectron spectroscopy,ultraviolet−visible spectrophotometry,and electrochemical *** passivation behavior and material removal mechanism were *** show that the use of mixed H_(2)O_(2)+Cu(NO_(3))_(2)oxidant can achieve higher polishing efficiency and surface quality compared with the single oxidant Cu(NO_(3))_(2)or H_(2)O_(2).The increase in material removal rate is attributed to the rapid oxidation of W into WO_(3)via the chemical reaction between the substrate and hydroxyl radicals produced by the Fenton-like *** addition,material removal rate and static etch rate exhibit significantly different dependencies on the concentration of Cu(NO_(3))_(2),while the superior oxidant for achieving the balance between polishing efficiency and surface quality is 0.5 wt.%H_(2)O_(2)+1.0 wt.%Cu(NO_(3))_(2).

关键词： chemical mechanical polishing tungsten Fenton-like reaction hydroxyl radical material removal mechanism

The miR172a–SNB module orchestrates both induced and adult-plant resistance to multiple diseases via MYB30-mediated lignin accumulation in rice

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Molecular Plant 2025年第1期18卷 59-75页

作者： He Wang Zhe-Xu Wang hong-yuan Tian Yu-Long Zeng Hao Xue Wan-Ting Mao Lu-Yue zhang jun-Ni chen Xiang Lu Yong Zhu Guo-Bang Li Zhi-Xue Zhao Ji-Wei zhang Yan-Yan Huang Jing Fan Pei-Zhou Xu Xiao-Qiong chen Wei-Tao Li Xian-jun Wu Wen-Ming Wang Yan Li State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Sichuan Agricultural UniversityChengdu 611130China Rice Research Institute and Key Lab for Major Crop Diseases Sichuan Agricultural UniversityChengduChina

Plants mount induced resistance and adult-plant resistance against different pathogens throughout the whole growth *** production faces threats from multiple major diseases,including rice blast,sheath blight,and bacterial leaf ***,we report that the miR172a–SNB–MYB30 module regulates both induced and adult-plant resistance to these three major diseases via lignification in ***,pathogen infections induce the expression of miR172a,which downregulates the transcription factor SNB to release its suppression of MYB30,leading to an increase in lignin biosynthesis and disease resistance throughout the whole growth ***,expression levels of miR172a and MYB30 gradually increase and are consistently correlated with lignin contents and disease resistance during rice development,reaching a peak at full maturity,whereas SNB RNA levels are negatively correlated with lignin contents and disease resistance,indicating the involvement of the miR172a–SNB–MYB30 module in adult-plant *** functional domain of SNB protein and its binding sites in the MYB30 promoter are highly conserved among more than 4000 rice accessions,while abnormal expression of miR172a,SNB,or MYB30 compromises yield traits,suggesting artificial selection of the miR172a–SNB–MYB30 module during rice *** together,these results reveal a novel role for a conserved miRNA-regulated module that contributes significantly to induced and adult-plant resistance against multiple pathogens by increasing lignin accumulation,deepening our understanding of broad-spectrum resistance and adult-plant resistance.

关键词： miR172a SNB MYB30 lignin induced resistance adult-plant resistance

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多参数未知下水声传感网由粗到精的定位方法

控制与决策 2025年第1期40卷 38-47页

作者：鲜江峰马俊领吴华锋梅骁峻谭拂晓张媛媛陈信强王维军上海海事大学物流科学与工程研究院上海201306 上海海事大学商船学院上海201306 上海海事大学物流工程学院上海201306 常州工学院计算机信息工程学院江苏常州213032 集美大学航海学院福建厦门361021

水声传感网(underwater acoustic sensor networks,UASNs)是水下物联网的主要技术,为海洋生态环境监测和水下搜救等应用提供了较好的技术手段和信息感知平台.在UASNs应用中定位至关重要,因为没有精确位置信息的数据收集将无利用价值.然... 详细信息

水声传感网(underwater acoustic sensor networks,UASNs)是水下物联网的主要技术,为海洋生态环境监测和水下搜救等应用提供了较好的技术手段和信息感知平台.在UASNs应用中定位至关重要,因为没有精确位置信息的数据收集将无利用价值.然而,由于存在路径损耗、吸收损耗、设备发射功率不确定以及水下环境参数未知等不利因素,使得在复杂动态海洋环境中实现鲁棒精确定位较为困难.为此,提出一种多参数未知下水声传感网由粗到精的定位方法(coarse-to-fine localization method for UASNs under unknown multi-parameters,CFL-UMP).首先,利用一阶泰勒级数展开和若干近似操作,将原非线性非凸定位问题转化为交替非负约束最小二乘框架;然后,粗定位阶段基于Golub-Kahan双对角化的最小二乘残差(LSMR)算法求解得到位置估计近似解,然而LSMR通常只能快速收敛到局部最优解,因此在精细定位阶段引入二分法,将第1步粗估计得到的近似解作为二分法的初始值,通过迭代同时得到水下目标位置、路径损耗因子以及发射功率的精确解;接着,为了验证CFL-UMP算法的优越性,分析CFL-UMP算法的计算复杂度,并推导出克拉默-拉奥下界;最后,与所选基准算法相比,通过仿真结果证实了CFL-UMP在不同水下模拟场景中均能获得最优的定位精度,且能够有效降低水下定位误差.

关键词：水声传感网目标定位接收信号强度多参数未知最小二乘残差算法二分法

Observation and mechanism of non-uniform distribution of tin nuclei in preparing vapor diffusion coated Nb_(3)Sn thin film for SRF applications

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Nuclear Science and Techniques 2025年第1期36卷 22-34页

作者： Shuai Wu Yang Ye Zi-Qin Yang yuan He Jian-Peng Li Guang-Ze Jiang Lu Li Shi-Chun Huang An-Dong Wu Hang-Xu Li Shao-Hua Lu Tao Liu feng Qiu Cang-Long Wang Ji-Zheng Duan Teng Tan Zhi-jun Wang Sheng-Hu zhang hong-Wei Zhao Wen-Long Zhan Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516007China School of Microelectronics Dalian University of TechnologyDalian 116000China

Growth of high-quality Nb_(3)Sn thin films for superconducting radiofrequency(SRF)applications using the vapor diffusion method requires a uniform distribution of tin nuclei on the niobium(Nb)*** study examines the mechanism underlying the observed non-uniform distribution of tin nuclei with tin chloride SnCl_(2).Electron backscatter diffraction(EBSD)analysis was used to examine the correlation between the nucleation behavior and orientation of niobium grains in the *** findings of the density functional theory(DFT)simulation are in good agreement with the experimental results,showing that the non-uniform distribution of tin nuclei is the result of the adsorption energy of SnCl_(2)molecules by varied niobium grain *** analysis indicated that the surface roughness and grain size of niobium also played significant roles in the nucleation *** study provides valuable insights into enhancing the surface pretreatment of niobium substrates during the growth of Nb_(3)Sn thin films using the vapor diffusion method.

关键词： Nucleation Tin chloride Non-uniform distribution Vapor diffusion Crystal orientation Adsorption energy

Influence of Cavitation on Unsteady Vortical Flows in a Side Channel Pump

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Chinese Journal of Mechanical Engineering 2023年第1期36卷 171-189页

作者： Yefang Wang Fan zhang Shouqi yuan Ke chen feng hong Desmond Appiah National Research Center of Pumps Jiangsu UniversityZhenjiang212013China College of Mechanical&Power Engineering China Three Gorges UniversityYichang443002China

Previous investigation on side channel pump mainly concentrates on parameter optimization and internal unsteady vortical ***,cavitation is prone to occur in a side channel pump,which is a challenging issue in promoting *** the present study,the cavitating flow is investigated numerically by the turbulence model of SAS combined with the Zwart cavitation *** vapors inside the side channel pump firstly occur in the impeller passage near the inlet and then spread gradually to the downstream passages with the decrease of ***,a strong adverse pressure gradient is presented at the end of the cavity closure region,which leads to cavity shedding from the *** small scaled vortices in each passage reduce significantly and gather into larger vortices due to the *** the three terms of vorticity transport equation with the vapor volume fraction and vorticity distributions,it is found that the stretching term is dominant and responsible for the vorticity production and evolution in cavitating *** addition,the magnitudes of the stretching term decrease once the cavitation occurs,while the values of dilatation are high in the cavity region and increase with the decreasing *** though the magnitude of the baroclinic torque term is smaller than vortex stretching and dilatation terms,it is important for the vorticity production along the cavity surface and near the cavity closure *** pressure fluctuations in the impeller and side channel tend to be stronger due to the *** primary frequency of monitor points in the impeller is 24.94 Hz and in the side channel is 598.05 *** are quite corresponding to the shaft frequency of 25 Hz(fshaft=1/n=25 Hz)and the blade frequency of 600 Hz(fblade=Z/n=600 Hz)*** study complements the investigation on cavitation in the side channel pump,which could provide the theoretical foundation for further optimization of performance.

关键词： Side channel pump Vortical flows Cavitation Vortex-cavitation interaction Pressure fluctuation