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Enhancing MPC methodology to system optimal control 认领 引用
1
作者 Shaoyuan Li Dewei Li +1 位作者 Yang Shi Xiaoming Hu 《Control Theory and Technology》 EI CSCD 2026年第2期171-172,共2页
The original intention of Model Predictive Control(MPC)was to bridge the gap between advanced control theories and the application of complex practical engineering systems.Since its emergence in the 1970s,it has been ... The original intention of Model Predictive Control(MPC)was to bridge the gap between advanced control theories and the application of complex practical engineering systems.Since its emergence in the 1970s,it has been one of the core technologies in the Advanced Process Control(APC)system.Owing to its receding horizon optimization mechanism and capability to handle constraints,MPC has consistently attracted attention from both academia and industry,and has been successfully applied in numerous industries such as petrochemicals,metallurgy,pharmaceuticals,electric power,water treatment,and power electronics.According to statistics from the International Federation of Automatic Control and industrial data,MPC has been deployed in some form in more than 50% of large-scale industrial control systems worldwide. 展开更多
关键词 model predictive control mpc Advanced Process Control advanced control theories System Optimal Control complex practical engineering systemssince receding horizon optimization mechanism advanced process control apc systemowing bridge gap
Collaborative control of array integrated distillation units via multi-agents technique 认领 引用
2
作者 Cuimei Bo Xin Li +4 位作者 Yu Wang He Zhang Jun Li Zhuxiu Zhang Xu Qiao 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2026年第3期161-174,共14页
To address the limitation problem of existing chemical processes and equipment in micro-chemical systems,this study proposes an array-type integrated distillation unit model.The multivariable collaborative control of ... To address the limitation problem of existing chemical processes and equipment in micro-chemical systems,this study proposes an array-type integrated distillation unit model.The multivariable collaborative control of product concentration and top pressure in the integrated distillation system is achieved via multi-agent technology.To reduce the frequent changes in feed flow and reboiler temperature input control commands,an event-triggered mechanism is introduced to ensure smooth system operation.For obtaining the states of each production variable in the process,an array integrated simulation system for the distillation unit is developed,which successfully collects data sets of key production and control variables through process software simulation.Utilizing subspace system modeling techniques and normalized datasets,the state equations for single-cluster systems within the array-integrated model are constructed.Subsequently,the proposed coordinated control algorithm is applied to the production process of o-chlorotoluene within a limited range of operating variables.Finally,the proposed control methodology is verified via simulations using Aspen Plus process data to ensure the continuity of chemical production process. 展开更多
关键词 Microreactor Process control Stability Dynamic modeling Multi-agents technology
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Use of statistical process control to study the patient-specific quality assurance in head and neck cancer 认领 引用
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作者 Pratibha Singh Manoj Kumar Singh Atul Mishra 《World Journal of Clinical Oncology》 2026年第4期115-129,共15页
BACKGROUND Patient-specific quality assurance(QA)is an essential component in the safe and precise delivery of radiotherapy,particularly in head and neck cancer cases where anatomical complexity and proximity to criti... BACKGROUND Patient-specific quality assurance(QA)is an essential component in the safe and precise delivery of radiotherapy,particularly in head and neck cancer cases where anatomical complexity and proximity to critical structures increase the risk of delivery deviations.As treatment techniques become more conformal and modulated,conventional gamma analysis often lacks sensitivity to subtle variations,necessitating advanced statistical tools to verify the accuracy of dose delivery.AIM To assess patient-specific QA performance,dosimetric accuracy,and long-term consistency using gamma analysis with statistical process control methods.METHODS A retrospective analysis of intensity-modulated radiation therapy and volumetric modulated arc therapy head and neck treatment plans was performed using electronic portal imaging device-based gamma pass rates under global criteria.Individual and Moving Range charts were generated to assess QA stability and detect trends.Initial control limits were derived from 20 QA plans and validated on 350 QA plans.Tolerance limits(TL)and action limits(AL)were calculated.The resulting charts offered a robust framework for monitoring QA performance and identifying deviations.RESULTS The central line values decreased progressively with stricter gamma criteria,from 98.835%(3%/3 mm)to 94.4%(2%/2 mm).TL and AL narrowed correspondingly,with TL dropping from 97.869%to 93.672%.Exponentially Weighted Moving Average charts provided smoother detection of persistent small deviations compared to Individual and Moving Range charts,enhancing sensitivity.Across all criteria,QA processes remained statistically stable,although tighter thresholds reduced pass rates.CONCLUSION Gamma analysis is a reliable method for patient-specific QA in head and neck radiotherapy.The incorporation of statistical process control adds a valuable layer of continuous monitoring,supports site-specific tolerance/AL,and strengthens treatment accuracy. 展开更多
关键词 Statistical process control Patient-specific quality assurance Head and neck radiotherapy Tolerance limits Action limits Individual-Moving Range charts Exponentially Weighted Moving Average charts
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Research on Bearing Characteristics and Construction Quality Control of Highway Bridge Pile Foundation 认领 引用
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作者 Jia Li 《Journal of World Architecture》 2026年第3期41-46,共6页
As a concealed project,the bearing characteristics and construction quality of highway bridge pile foundations directly determine the safety and durability of bridge structures.However,there are still problems in the ... As a concealed project,the bearing characteristics and construction quality of highway bridge pile foundations directly determine the safety and durability of bridge structures.However,there are still problems in the current pile foundation construction,such as poor geological adaptability,lax control of process parameters,and outdated detection methods,resulting in insufficient bearing capacity and frequent quality hazards.This article refers to the standardized academic paper architecture,systematically analyzes the load transfer mechanism and bearing characteristics evolution law of pile foundations,constructs a quality control system guided by bearing mechanisms,with process control as the core and dynamic detection as the guarantee,proposes the implementation path from"experience construction"to"data-driven construction",studies the control methods of key links such as geological exploration,pore forming technology,concrete pouring,integrity testing,etc.,aiming to provide theoretical and practical support for improving the construction quality and optimizing the bearing performance of highway bridge pile foundations. 展开更多
关键词 Highway bridges Pile foundation Bearing characteristics Construction quality Process control Datadriven
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Research on Whole‑Process Cost Control Strategies of Municipal Projects from the Perspective of Engineering Technology Management 认领 引用
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作者 YAO Yanping 《外文科技期刊数据库（文摘版）工程技术》 2026年第8期128-131,共4页
Municipal projects are core components of urban infrastructure construction, characterized by wide‑ranging construction contents, complex on‑site conditions, numerous influencing factors and high risk of cost overrun.... Municipal projects are core components of urban infrastructure construction, characterized by wide‑ranging construction contents, complex on‑site conditions, numerous influencing factors and high risk of cost overrun. Traditional cost control mostly focuses on post‑audit and static cost accounting, separating technical management from cost management, which easily leads to design defects, frequent engineering changes and out‑of‑control investment. Starting from the perspective of engineering technology management, this paper takes the whole‑life cycle of municipal projects as the main line, sorts out prominent cost‑control problems existing in decision‑making, design, bidding‑tendering, construction and completion‑acceptance stages. Combined with technical management means such as limit design, BIM digital technology, construction scheme optimization and technical‑economic demonstration, systematic whole‑process cost‑control strategies are put forward. The study indicates that deep integration of engineering technology management and cost control can realize pre‑risk prevention, in‑process dynamic monitoring and post‑event standardized settlement, effectively reduce invalid investment, restrain cost overrun risk and improve comprehensive benefit of government‑invested municipal projects. 展开更多
关键词 municipal engineering engineering technology management whole?process cost control engineering change BIM technology
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Microstructure and mechanical properties of a Cr-Ni-W-Mo steel processedthermo-mechanical controlled processing 认领 引用 被引量：5
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作者 Jia-xin Liang Ying-chun Wang +3 位作者 Xing-wang Cheng Zhuang Li Jin-ke Du Shu-kui Li 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2021年第6期713-721,共9页
Experiments were conducted to evaluate the microstructure and tensile properties of a medium carbon Cr-Ni-W-Mo steel processedthermo-mechanical controlled processing(TMCP)with cooling at different conditions in water,... Experiments were conducted to evaluate the microstructure and tensile properties of a medium carbon Cr-Ni-W-Mo steel processedthermo-mechanical controlled processing(TMCP)with cooling at different conditions in water,oil,air or lime followedlow tempering.Compared to normal heat-treatment processing,TMCP with water-cooling after deformation enhances the yield strength and tensile strength of the steelabout 323 MPa and about 251 MPa,respectively,due to higher dislocation strengthening and grain boundary strengthening.Meanwhile,it increases the elongation by ;about 1.76%attributed to the increase in volume percentage of the retained austenite and the refined laths of tempered martensite.Slowing the cooling rate after deformation during TMCP leads to a decrease in the strength.This results the coupling effectsthe reduction in dislocation density and volume fraction of tempered martensite together with the coarseness in martensite sizes.However,cooling rate decreasing has less influences on ductility becathe improved elongation the increase in the volume fractions of both retained austenite and lower bainite together with dislocation density decreasing is compensatedthe reduced elongation coarsened grains. 展开更多
关键词 Thermo-mechanical controlled processing Ultra-high strength steel Microstructure Bainite Tensile property
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SINGLE MACHINE SCHEDULING WITH CONTROLLABLE PROCESSING TIMES AND COMPRESSION COSTS (PART I:EQUAL TIMES AND COSTS) 认领 引用 被引量：1
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作者 TANGGUOCHUN FOULDS,L.R. 《Applied Mathematics(A Journal of Chinese Universities)》 1998年第4期417-426,共10页
Abstract Most papers in scheduling research have treated individual job processing times as fixed parameters. However, in many practical situations, a manager may control processing time by reallocating resources. In ... Abstract Most papers in scheduling research have treated individual job processing times as fixed parameters. However, in many practical situations, a manager may control processing time by reallocating resources. In this paper, authors consider a machine scheduling problem with controllable processing times. In the first part of this paper, a special case where the processing times and compression costs are uniform among jobs is discussed. Theoretical results are derived that aid in developing an O(n 2) algorithm to slove the problem optimally. In the second part of this paper, authors generalize the discussion to general case. An effective heuristic to the general problem will be presented. 展开更多
关键词 Machine scheduling problems controllable processing times uniform compression timeand cost dominance set lateness crash activities polynomial time algorithm
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Effect of Thermomechanical Controlled Processing on Mechanical Properties of 490 MPa Grade Low Carbon Cold Heading Steel 认领 引用 被引量：1
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作者 LI Zhuang 《Journal of Iron and Steel Research International》 SCIE CAS 2009年第3期43-48,共6页
Thermomechanical controlled processing （TMCP） of low carbon cold heading steel in different austenite conditions were conducted by a laboratory hot rolling mill. Effect of various processing parameters on the mechan... Thermomechanical controlled processing （TMCP） of low carbon cold heading steel in different austenite conditions were conducted by a laboratory hot rolling mill. Effect of various processing parameters on the mechanical properties of the steel was investigated. The results showed that the mechanical properties of the low carbon cold heading steel could be significantly improved by TMCP without heat treatment. The improvement of mechanical properties can be attributed mainly to the ferrite grain refinement due to low temperature rolling. In the experiments the better ultimate tensile strength and ductility are obtained by lowering finishing cooling temperature within the temperature range from 650 ℃ to 550 ℃ since the interlamellar space in pearlite colonies become smaller. Good mechanical properties can be obtained in a proper austenite condition and thermomechanical processing parameter. The ferrite morphology has a more pronounced effect on the mechanical behavior than refinement of the microstructure. It is possible to realize the replacement of medium-carbon by low-carbon for 490 MPa grade cold heading steel with TMCP. 展开更多
关键词 thermomechanical controlled processing TMCP low carbon cold heading steel low temperature rolling finishing cooling temperature
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SINGLE MACHINE SCHEDULING WITH CONTROLLABLE PROCESSING TIMES AND COMPRESSION COSTS : PROOF OF THEOREMS 认领 引用
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作者 TANGGUOCHUN FOULDS,L.R. 《Applied Mathematics(A Journal of Chinese Universities)》 1998年第4期427-436,共10页
Abstract This report is virtually the appendix part of the author's previous paper which includes the proofs for the theorems and lemmas.
关键词 Machine scheduling problems controllable processing times uniform compression time and cost dominance set lateness crash activities polynomial time algorithm
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NO emission control during sintering process 认领 引用
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作者 Xin-feng Zhao Jie Li +4 位作者 Xi-wei Qi Xin-tao Hao Ai-min Yang Zun-qian Zhang Hong Wang 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2025年第8期2286-2296,共11页
During the sintering process of iron ore,a large amount of nitrogen oxides is generated,for which there is currently no efficient and economical treatment process.Therefore,it is necessary to implement process control... During the sintering process of iron ore,a large amount of nitrogen oxides is generated,for which there is currently no efficient and economical treatment process.Therefore,it is necessary to implement process control in sintering production to keep the mass concentration of NOxin sintering flue gas at a low level.Through industrial trials at sintering sites,methods such as correlation analysis,path analysis,and multiple linear regression were applied to analyze the influence of various factors on NO emissions during the sintering process.The results indicate that negative correlations exist between nitrogen monoxide(NO)emissions and negative pressure,permeability index,O2 concentration,CO concentration,and flue gas temperature.Conversely,positive correlations exist between NO emissions and dust concentration,water vapor volume fraction,and sintering bed speed.Among these factors,O2 concentration and dust concentration are identified as the most significant influencing factors on NO emissions.By analyzing the masses and modes of influence of different factors,the mechanisms of action of each factor were obtained.Specifically,O2 concentration,dust concentration,permeability index,CO concentration,and flue gas temperature play a direct dominant role in NO emissions during the sintering process,while water vapor volume fraction,sintering trolley speed,and negative pressure have an indirect effect.A predictive model for NO mass concentration in flue gas was established with an accuracy rate of 91.6%,showing consistent overall trends with actual values.Finally,denitrification strategies for sintering industrial production were proposed,along with prospects for preliminary denitrification of sintering flue gas using fluidized bed conditions in the duct. 展开更多
关键词 Sintering flue gas Denitrification Process control Optimal path Sintering
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Coordinated control of decarbonization efficiency and oxygen absorption rate in Ruhrstahl–Heraeus degasser based on mechanism model and BP neural network 认领 引用 被引量：1
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作者 Lu-heng Jiang Min Wang +3 位作者 Jia-qi Zhao Cheng Yao Li-dong Xing Xin-gang Ai 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2025年第3期606-618,共13页
A mathematical model of the decarburization reaction zone was established for the Ruhrstahl–Heraeus (RH) forced oxygen blowing decarburization process by Matlab R2022b software. For the problem of inaccurate predicti... A mathematical model of the decarburization reaction zone was established for the Ruhrstahl–Heraeus (RH) forced oxygen blowing decarburization process by Matlab R2022b software. For the problem of inaccurate prediction due to the large variation range of oxygen absorption rate under different process conditions, we statistically analyzed the main factors affecting the oxygen absorption rate. The backpropagation neural network was used to train and predict the oxygen absorption rate and was used to calculate the RH decarburization reaction zone model. We designed and developed a mathematical modeling software with process control of decarburization in RH degasser, which can realize the change of operating process parameters in the dynamic prediction process. The optimized mathematical model has more than 95% of the furnaces whose absolute error in calculation of carbon content is within ± 5 × 10−6, more than 90% of the heats whose relative error in calculation of oxygen content is within ± 15%, and the average absolute error of calculation of oxygen content is 26.4 × 10−6. Finally, we studied the influence of oxygen blowing timing, oxygen blowing volume and initial oxygen content on the forced decarburization process. 展开更多
关键词 Ruhrstahl-Heraeus degasser Mathematical model Forced decarburization Oxygen absorption rate Process control
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Explicit ARL Computational for a Modified EWMA Control Chart in Autocorrelated Statistical Process Control Models 认领 引用 被引量：1
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作者 Yadpirun Supharakonsakun Yupaporn Areepong Korakoch Silpakob 《Computer Modeling in Engineering & Sciences》 SCIE EI 2025年第10期699-720,共22页
This study presents an innovative development of the exponentially weighted moving average(EWMA)control chart,explicitly adapted for the examination of time series data distinguished by seasonal autoregressive moving ... This study presents an innovative development of the exponentially weighted moving average(EWMA)control chart,explicitly adapted for the examination of time series data distinguished by seasonal autoregressive moving average behavior—SARMA(1,1)L under exponential white noise.Unlike previous works that rely on simplified models such as AR(1)or assume independence,this research derives for the first time an exact two-sided Average Run Length(ARL)formula for theModified EWMAchart under SARMA(1,1)L conditions,using a mathematically rigorous Fredholm integral approach.The derived formulas are validated against numerical integral equation(NIE)solutions,showing strong agreement and significantly reduced computational burden.Additionally,a performance comparison index(PCI)is introduced to assess the chart’s detection capability.Results demonstrate that the proposed method exhibits superior sensitivity to mean shifts in autocorrelated environments,outperforming existing approaches.The findings offer a new,efficient framework for real-time quality control in complex seasonal processes,with potential applications in environmental monitoring and intelligent manufacturing systems. 展开更多
关键词 Statistical process control average run length modified EWMA control chart autocorrelated data SARMA process computational modeling real-time monitoring
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Study on the Interactivity of Controlled and Automatic Information Processing in L2 Reading 认领 引用
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作者 DONG Tiantian WANG Yong 《Sino-US English Teaching》 2024年第7期314-321,共8页
L2 reading is not only an important channel for people to obtain information and knowledge,but also the main way for people to learn a foreign language.Reading information processing can be divided into controlled pro... L2 reading is not only an important channel for people to obtain information and knowledge,but also the main way for people to learn a foreign language.Reading information processing can be divided into controlled processing and automatic processing.Controlled information processing is a conscious and resource-intensive processing model,while automatic information processing is an unconscious and automatic processing model.This study investigates the characteristics and interactivity of controlled and automatic information processing in L2 reading,and explores the roles of controlled and automatic information processing strategies in improving L2 reading ability.The findings are as follows:(a)controlled and automatic information processing is interactive in L2 reading;and(b)the uses of controlled and automatic information processing strategies are beneficial to the improvement of the reading ability of L2 learners.This study has important theoretical and practical value in improving the efficiency of L2 reading teaching and learning. 展开更多
关键词 L2 reading controlled information processing automatic information processing interactivity
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Novel approach to improving additive manufacturing precision via bivariate molten pool dimension regulation 认领 引用 被引量：1
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作者 Qianru Wu Jingqi Liu +4 位作者 Lu Yan Jiachen Wang Cuimeng Lv Wenlai Tang Jiquan Yang 《Additive Manufacturing Frontiers》 CAS CSCD 2026年第2期157-173,共17页
Directed energy deposition arc welding(DED-arc)encounters challenges such as low forming precision and compromised process stability during the deposition process owing to its intricate molten pool dynamics.The measur... Directed energy deposition arc welding(DED-arc)encounters challenges such as low forming precision and compromised process stability during the deposition process owing to its intricate molten pool dynamics.The measurement and control of the molten-pool size are essential to addressing these problems.However,most contemporary research focuses on controlling a single variable(e.g.,molten-pool width or height)in either open-or closed-loop configurations.This approach is inherently limited in addressing the dynamic nonlinear characteristics and high-precision requirements of the DED-arc process.To address this challenge,we designed a binocular passive vision sensing system that utilizes an image processing algorithm to facilitate the real-time measurement and size extraction of the molten-pool width and height.A dual fuzzy proportional–integral–derivative controller was also developed to control the width and height of the molten pool by adjusting the arc current and voltage separately.This controller was then compared with open-loop control experiments under constant parameters.The results demonstrate that the proposed bivariate control method can effectively regulate the error range of the actual and detected values of the molten-pool width and height within 0.5 and 0.3 mm,respectively,thereby significantly enhancing the control accuracy and optimizing the forming appearance of thin-walled metal parts. 展开更多
关键词 Additive manufacturing Intelligent monitoring Process control Surface forming quality
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Adaptive feedback control of stability in an axial compressor with circumferential inlet distortion 认领 引用 被引量：9
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作者 Juan DU Yang LIU +3 位作者 Jichao LI Wenqiang ZHANG Hongwu ZHANG Chaoqun NIE 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2023年第5期187-201,共15页
The adaptive feedback control of stability with circumferential inlet distortion has been experimentally investigated in a low-speed,axial compressor.The flat-baffles with different span heights are used to simulate d... The adaptive feedback control of stability with circumferential inlet distortion has been experimentally investigated in a low-speed,axial compressor.The flat-baffles with different span heights are used to simulate different distorted inflow cases.Compared with auto-correlation and root-mean-square analysis,cross-correlation analysis used to predict early stall warning does not depend on the distortion position.Hence,the cross-correlation coefficient was used to monitor the stable status of the compressor and provide the feedback signal in the active control strategy when suffering from different distortions.Based on the stall margin improvement of tip air injection obtained under different distorted inflow cases and the sensitivity analysis of cross-correlation coefficients to injected momentum ratios,tip air injection was adopted as the actuator for adaptive feedback control.The digital signal processing controller was designed and applied to achieve adaptive feedback control in distorted inflow conditions.The results show that the adaptive feedback control of air injection nearly achieves the same stall margin improvement as steady air injection under different distortion intensities with a reduced injection mass flow.Thus,the proposed adaptive feedback control method is ideal for the engine operation with circumferential distorted inflow,which frequently occurs in flight. 展开更多
关键词 Circumferential inlet distortion Cross-correlation Digital signal processing controller Stability control Tip air injection Tip leakage flow
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Uster Technologies introduces its new fiber process control system 认领 引用
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《China Textile》 2025年第3期48-49,共2页
Fiber quality measurement in spinning preparation is crucial for optimizing waste and meeting yarn quality specifications.The brand-new Uster AFIS 6–the next-generation laboratory instrument from Uster Technologies–... Fiber quality measurement in spinning preparation is crucial for optimizing waste and meeting yarn quality specifications.The brand-new Uster AFIS 6–the next-generation laboratory instrument from Uster Technologies–uniquely tests man-made fiber properties in addition to cotton.It provides critical data to optimize fiber process control for cotton,man-made fibers,and blended yarns. 展开更多
关键词 optimizing waste fiber quality measurement spinning preparation man made fiber blended yarns fiber process control optimize fiber process control
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Intelligent evolution strategies for high-performance cutting tools:status,challenges,and trends 认领 引用
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作者 Nian Wan Zhihao Wang +2 位作者 Biao Zhao Wenfeng Ding Qi Liu 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第2期250-283,共34页
Traditional tools have limited adaptability in complex machining environments due to their lack of working-condition perception and autonomous regulation.With advances in sensors,materials,and data-processing technolo... Traditional tools have limited adaptability in complex machining environments due to their lack of working-condition perception and autonomous regulation.With advances in sensors,materials,and data-processing technologies,tool design is shifting from a single-function‘mechanical arm’for cutting towards integrated intelligent terminals.This paper systematically reviews progress in intelligent tool technology from two perspectives:design and regulation.For intelligent design,the fundamental principles of condition-perception tools equipped with built-in multi-type sensors are discussed,enabling in situ,real-time monitoring of multidimensional parameters such as cutting force,temperature,and vibration.Force monitoring is achieved through elastic deformation or dynamic charge response,temperature monitoring through the thermoelectric effect,and vibration monitoring through micro-displacement and intensity detection.The design focus emphasises sensor miniaturisation and integration,balancing measurement accuracy with tool stiffness while minimising machining interference.In regulation,key technologies for constructing closed-loop control systems(CLCS)are summarised,which dynamically adjust cutting speed,feed rate,and other parameters based on sensed data,achieving precise control of force,temperature,and vibration via feedback mechanisms and driving units.Breakthroughs in tool wear compensation(TWC)mechanisms are introduced.Multi-source signal fusion combined with deep learning algorithms is further examined for improving monitoring accuracy and remaining useful life(RUL)prediction.Through model predictive control,intelligent regulation of cutting parameters within process flows is realised.Finally,challenges such as sensor reliability,multi-source coupling,and balancing cost with industrial applicability are analysed.Future directions highlight novel structural designs,high-performance material development,and multi-technology integration,aiming to establish a fully intelligent machining system through the integrated design of‘perception-decision-execution’. 展开更多
关键词 intelligent tool condition perception process intelligent control novel tool structure multi-technology integration
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Multi-beam scanning electron microscope(MBSEM):Technological evolution,core breakthroughs,and cross-field applications 认领 引用
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作者 Wuyang Tan Mengni Liu +5 位作者 Ke Pei Chendi Yang Jiazhuan Qin Chao Wang Xuebing Zhao Renchao Che 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第6期501-512,共12页
Multi-beam scanning electron microscope(MBSEM)reconciles the inherent contradiction between“resolution and throughput”of traditional scanning electron microscopes(SEMs)through parallel electron beam manipulation,eme... Multi-beam scanning electron microscope(MBSEM)reconciles the inherent contradiction between“resolution and throughput”of traditional scanning electron microscopes(SEMs)through parallel electron beam manipulation,emerging as a key technology to address the bottlenecks in large-volume,high-resolution imaging and advanced industrial inspection.This article provides a comprehensive overview of MBSEM,covering its evolutionary course of technology,core design fundamentals,and interdisciplinary applications.First,it sorts out the evolutionary process from conceptualization in the early 21 st century to commercialization in the 2010s,clarifying the core logic of breaking through the physical limitations of single-beam systems via“multi-beam parallelism”.Subsequently,focusing on the core technological chain of“beam generation–optical focusing–signal detection–data processing”,it conducts an in-depth analysis of the design concepts,technical characteristics,and applicable scenarios of three mainstream architectures:the single-source single-column,split optical system,and semiconductor-specific multi-beam inspection(MBI).Combined with representative research and product data from teams such as Delft University of Technology,Zeiss,and ASML/HMI,it reveals the differentiated advantages of each architecture in beam uniformity(the relative deviation percentage of the current density and probe size of each sub-beam in the multi-beam array from the central beam,with a smaller deviation value indicating better uniformity)and signal crosstalk(the percentage of the interference signal intensity to the target signal intensity when the detection signal of a single beam in the multi-beam array interferes with the detection channel of adjacent beams)control,and throughput(the percentage of the interference signal intensity to the target signal intensity when the detection signal of a single beam in the multi-beam array interferes with the detection channel of adjacent beams)improvement.Finally,integrating the practical demands of neuroscience connectomics,advanced semiconductor manufacturing processes,and biomedicine,it elaborates on the application breakthroughs of MBSEM in the three-dimensional(3D)reconstruction of large-volume brain tissue,wafer defect screening for 7 nm and smaller nodes,and low-damage imaging of thin biological tissues,and compares its disruptive value relative to traditional technologies(single-beam SEM,optical inspection).Unlike previous reviews,this work systematically integrates both academic prototypes and industrial systems for the first time,providing an in-depth analysis of the differentiated trade-offs among imaging speed,resolution,and sample adaptability across different architectures,offering a systematic reference for MBSEM R&D and interdisciplinary applications. 展开更多
关键词 multi-beam scanning electron microscopy(MBSEM) parallel imaging technology connectomics advanced semiconductor process inspection beam control and signal processing
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Improved neural network automation design method for energy saving and carbon emission reduction of petrochemical production processes 认领 引用
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作者 Guocong Lin Qingxu Ni +4 位作者 Xuehai Liu Zhiqiang Geng Feng Pan Jun Tian Yongming Han 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2026年第2期348-360,共13页
Ethylene yield serves as a key metric in petrochemical production,where optimizing its energy efficiency remains a critical challenge for sustainable production.Meanwhile,manual hyperparameter tuning of deep learning ... Ethylene yield serves as a key metric in petrochemical production,where optimizing its energy efficiency remains a critical challenge for sustainable production.Meanwhile,manual hyperparameter tuning of deep learning based yield prediction models often results in suboptimal configurations,which reduces prediction accuracy and reliability due to extreme operating conditions generating outliers in ethylene production processes.Therefore,a novel neural network automatic design method(NNADM)is proposed,which incorporates the neural network parameters automatic optimization and loss function adaptive construction.An innovative adaptive loss formulation is proposed to strategically integrate the complementary strengths of the mean squared error(MSE)and the Log-Cosh functions,featuring dynamic outlier resistance through self-adjusting weight coefficients.Then,the Bayesian optimization search algorithm is utilized to discover optimal hyperparameters of the neural network,including hidden layer unit,epoch,batch size,and the loss function.Finally,the NNADM is integrated with several classical neural networks for ethylene yield prediction.Experimental results show that several classical neural networks realize an average of 16.86%decrease in MSE index after integrating the NNADM.In addition,the proposed model offers direction and development blueprints for ethylene production facilities that have low energy efficiency.By implementing this model,it is possible to cut approximately 8376.4 tons of carbon emissions and simultaneously secure an extra 499 tons of ethylene output. 展开更多
关键词 Prediction Process control Model Production guidance Automation design Energy efficiencyoptimization
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AI for quality management:A review 认领 引用
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作者 Yangyang HUANG Yu TAN +2 位作者 Yuanyuan LI Yongxiang LI Kwok-Leung TSUI 《ENGINEERING Management》 CSCD 2026年第2期292-334,共43页
Recent advances in artificial intelligence(AI)have significantly enhanced quality management,enabling more effective handling of complex,high-dimensional,and multi-modal data.AI methods,including machine learning(ML)a... Recent advances in artificial intelligence(AI)have significantly enhanced quality management,enabling more effective handling of complex,high-dimensional,and multi-modal data.AI methods,including machine learning(ML)and deep learning(DL),have been pivotal in advancing key areas such as quality optimization,monitoring,and diagnosis.These methods have increased adaptability,efficiency,and scalability,making them particularly suitable for modern industrial applications.This review provides a comprehensive examination of AI methods in quality management,covering the integration of surrogate models,Bayesian optimization(BO),intelligent control charts,change-point detection(CPD),and interpretable quality diagnosis.The review concludes with proposed directions for future research aimed at overcoming existing challenges and enhancing the deployment of AI in real-world quality management implementation. 展开更多
关键词 quality control Bayesian optimization statistical process control stream of variation causal inference
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