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15th International Conference on Optimization and Applications, OPTIMA 2024

作者： Karamzin, Dmitry Federal Research Center "Computer Science and Control" of Russian Academy of Sciences Vavilova Street 44 Moscow119333 Russia

ISBN: (纸本)9783031791185

Finite-dimensional degenerate optimization problems with equality and inequality constraints are addressed. One sufficient condition for quadraticity is proposed, that is, when the problem under study can be reduced to a quadratic problem by virtue of a given admissible quadratic perturbation of the constraint mapping. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Optimization algorithms

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A Geometric Model Simplification Strategy for CFD Simulation of the Cockpit Internal Environment

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Computer Modeling in engineering & sciences 2025年第2期142卷 1545-1564页

作者： Meng Zhao Jiaao Liu YudiLiu Zhengwei Long Tianjin Key Lab.of Indoor Air Environmental Quality Control School of Environmental Science and EngineeringTianjin UniversityTianjin300072China Architectural Institute China Railway Design CorporationTianjin300308China Environmental Control Oxygen Department Shanghai Aircraft Design and Research InstituteCOMACShanghai201210China

Computational Fluids Dynamics(CFD)simulations are essential for optimizing the design of a cockpit’s internal environment,but the complex geometric models consume a significant amount of computational resources and *** simplification of geometric models may result in inaccurate calculations of physical *** address this issue,this study establishes a geometric model simplification strategy and successfully applies it to a *** implementation of the whole approach is divided into three steps,summarized in three methods,namely Sensitivity Analysis Method(SAM),Detail Suppression Method(DSM),and Evaluation Standards Method(ESM).Sensitivity analysis of the detailed features of the geometric model is performed using the adjoint *** details of the geometric model are suppressed based on the principle of curvature *** evaluation,the suppression degrees of detailed features with different sensitivity levels are *** results demonstrate that this strategy can be employed to achieve precise simplification standards,thereby avoiding excessive deviations caused by arbitrary simplification and reducing the significant costs associated with trial-and-error simplification.

关键词： CFD model simplification cockpit sensitivity analysis detail suppression

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A Maximum Principle for a State-Constrained Optimal control Problem Whose Data is Measurable in the Time-Variable 15th

A Maximum Principle for a State-Constrained Optimal Contro...

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15th International Conference on Optimization and Applications, OPTIMA 2024

作者： Karamzin, Dmitry Federal Research Center "Computer Science and Control" of Russian Academy of Sciences Vavilova Street 44 Moscow119333 Russia

ISBN: (纸本)9783031791185

A state-constrained optimal control problem is examined whose data depends on the time variable t. It is assumed that the dependence on the time-variable is measurable. Under the additional hypothesis that the control problem is linear-convex, a maximum principle is derived whose form is based on the notion of closure with respect to measure of a measurable function. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Optimal control systems

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Soil aggregate stability assessment based on ultrasonic agitation:Limitations and recommendations after sixty years(1964–2023)

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Pedosphere 2025年第1期35卷 67-83页

作者： Fakher ABBAS Jianjun DU Haibin CHEN Muhammad AZEEM Ruqin FAN Guangdong Engineering and Technology Center for Environmental Pollution Prevention and Control in Agricultural Producing Areas College of Environmental Science and EngineeringZhongkai University of Agriculture and EngineeringGuangzhou 510225China Institute of Soil and Environmental Sciences PMAS-Arid Agriculture University RawalpindiRawalpindi 46000Pakistan

Soil aggregate stability is a fundamental measure for evaluating soil *** numerous tests exist for assessing soil aggregate stability,ultrasonic agitation(UA)is widely recognized for its ***,a significant limitation of UA is the lack of standardized methodologies and stability assessment criteria,resulting in inconsistency and incomparability across *** critical factors influence the assessment of soil aggregate stability,including sample preparation(e.g.,drying,sieving,and settling duration),initial and final aggregate size classes,the definition of final energy form and its calculation,variations in instrumentation and laboratory procedures,and the absence of standardized *** some stability methods,UA produces a broad range of results,with dispersion energy varying significantly(0.5–13440 J g^(-1))across different soil and aggregate types due to divergent procedural *** settings encompass factors such as initial power and amplitude,temperature fluctuation,soil/water ratio,probe specification(diameter and insertion depth),and the choice of liquid used during the ***,UA faces challenges related to limited reproducibility,raising doubts about its status as a standard stability assessment *** address these issues,standardization through predefined procedures and stability criteria has the potential to transform UA into a precise and widely accepted method for both qualitative and quantitative assessments of soil *** this comprehensive review,we outline the challenges in standardizing UA,elucidate the factors contributing to dispersion energy variation,and offer practical recommendations to establish standardized protocols for UA in soil aggregate stability assessments.

关键词： aggregate cavitation dispersion energy particle size distribution soil structure stability method ultrasonication

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Thermodynamic-based ecological scaling theory in urban metabolic framework:a review

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Frontiers of Environmental science & engineering 2025年第1期19卷 69-85页

作者： Gengyuan Liu Mingwan Wu State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China Beijing Engineering Research Center for Watershed Environmental Restoration&Integrated Ecological Regulation Beijing 100875China

Prior research has consistently demonstrated that urban economic and social systems adhere to the empirical scaling ***,a plethora of evidence,including the scale-free networks of energy metabolism,the allometric growth patterns of species and populations,and the scaling law relationship between exergy and transformity in biosphere systems across various levels,indicates that urban ecosystems exhibit multi-level scaling law characteristics in energy metabolism under self-organization,alongside significant human activity *** study synthesizes these findings to hypothesize that urban ecological components are also aligned with system-level scaling theory within the urban metabolism *** encompasses:1)the existence of multistable coexistence and mutual transformation phenomena,mirroring the dynamic nature of scaling laws;and 2)a nuanced balance between the ecosystem and the socio-economic system,particularly in the realms of spatial competition and output *** ecosystem scaling theory hypotheses of urban metabolic processes offer a theoretical foundation for identifying ecological security tipping points,which are pivotal in the strategic decision-making for ecological planning and management in the future.

关键词： Ecosystem scaling theory Urban metabolism Complexity Critical review

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Soil holobiont interplay and its role in protecting plants against salinity stress

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Pedosphere 2025年第1期35卷 97-115页

Salinity poses a significant challenge to global agricultural productivity,impacting plant growth,yield,soil fertility,and the composition of soil microbial ***,salinity has a significant impact in shifting soil microbial communities and their functional ***,we explored and analyzed the intricate relationships among plant-associated microbes/microbiome,including plant growth-promoting bacteria,arbuscular mycorrhizal fungi(AMF),archaea,and viruses in alleviating salinity stress in *** this review,we have highlighted that salinity stress selectively enhances the growth of certain microbes such as Gammaproteobacteria,Bacteroidetes,Firmicutes,Acidobacteria,Euryarchaeota,Thaumarchaeota,Crenarchaeota,and lysogenic viruses,while decreasing the abundances of others(Alphaproteobacteria and Betaproteobacteria)and AMF root *** microbes regulate water and nutrient uptake,decrease ionic and osmotic toxicity,enhance the syntheses of antioxidant enzymes(catalase and glutathione S-transferases)and osmolytes(erythrose and galactinol),increase phytohormone(indole-3 acetic acid)production,and activate salinity stress tolerance genes(SOD,APX,and SKOR)in ***,we meticulously examined the significance of soil microbiome and the need for multidisciplinary omics studies on the changes in soil microbiome composition and the relationships of synergistic holobiont in mitigating salinity stress in *** studies will provide insights into the use of microbial components as a sustainable and eco-friendly approach to modulate salinity stress and enhance agricultural productivity.

关键词： agricultural productivity microbial communities multiomics approaches plant-microbe interaction stress tolerance

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Deformation energy of tectonic coal under hydrostatic conditions:A new calculation model based on critical state theory

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International Journal of Mining science and Technology 2025年第1期35卷 87-100页

作者： Chenghao Wang Haisong Liu Yuanping Cheng Liang Wang Jingyu Jiang Artificial Intelligence Research Institute China University of Mining and TechnologyXuzhou 221116China National Engineering Research Center for Coal Gas Control China University of Mining and TechnologyXuzhou 221116China Intelligent Early Warning and Prevention Research Center for Coal Mine Disasters China University of Mining and TechnologyXuzhou 221116China School of Safety Engineering China University of Mining and TechnologyXuzhou 221116China

The deformation energy(Wd)of soil-like tectonic coal is crucial for investigating the mechanism of coal and gas *** coal has a significant nonlinear constitutive relationship,which makes traditional elastic-based models for computing *** by critical state soil mechanics,this study theoretically established a new calculation model of Wdsuitable for the coal with nonlinear deformation *** the new model,the relationship between energy and stress no longer follows the square law(observed in traditional linear elastic models)but exhibits a power function,with the theoretical value of the power exponent ranging between 1 and *** cyclic loading and unloading experiments were conducted on four groups of tectonic coal samples and one group of intact coal *** results indicated that the relationship between Wdand stress for both intact and tectonic coal follows a power *** exponents for intact and tectonic coal are close to 2 and 1,*** stress-strain curve of intact coal exhibits small deformation and linear characteristics,whereas the stress-strain curves of tectonic coal show large deformation and nonlinear *** study specifically investigates the role of coal viscosity in the cyclic loading/unloading *** downward bending in the unloading curves can be attributed to the time-dependent characteristics of coal,particularly its viscoelastic *** on experimental statistics,the calculation model of Wdwas further *** simplified model involves only one unknown parameter,which is the power exponent between Wdand *** measured Wdof the coal samples increases with the number of load *** phenomenon is attributed to coal's viscoelastic *** the same stress,the Wdof tectonic coal is an order of magnitude greater than that of intact *** calculation model of Wdproposed in this paper provides a new tool for studying the energy princip

关键词： Coal and gas outburst Tectonic coal Deformation energy Calculation model Critical state soil mechanics

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MACLSTM: A Weather Attributes Enabled Recurrent Approach to Appliance-Level Energy Consumption Forecasting

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Computers, Materials & Continua 2025年第2期82卷 2969-2984页

作者： Ruoxin Li Shaoxiong Wu Fengping Deng Zhongli Tian Hua Cai Xiang Li Xu Xu Qi Liu NARI-TECH Nanjing Control System Co. Ltd.Nanjing211106China School of Software Nanjing University of Information Science&TechnologyNanjing210044China Jiangsu Province Engineering Research Center of Advanced Computing and Intelligent Services Nanjing210044China

Studies to enhance the management of electrical energy have gained considerable momentum in recent years. The question of how much energy will be needed in households is a pressing issue as it allows the management plan of the available resources at the power grids and consumer levels. A non-intrusive inference process can be adopted to predict the amount of energy required by appliances. In this study, an inference process of appliance consumption based on temporal and environmental factors used as a soft sensor is proposed. First, a study of the correlation between the electrical and environmental variables is presented. Then, a resampling process is applied to the initial data set to generate three other subsets of data. All the subsets were evaluated to deduce the adequate granularity for the prediction of the energy demand. Then, a cloud-assisted deep neural network model is designed to forecast short-term energy consumption in a residential area while preserving user privacy. The solution is applied to the consumption data of four appliances elected from a set of real household power data. The experiment results show that the proposed framework is effective for estimating consumption with convincing accuracy.

关键词： Electrical load forecasting cloud computing smart grid weather attributes energy consumption time-series analysis

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Investigation on coal damage and fracture extension law of liquid nitrogen injection pre-cooling and fracturing under true triaxial stress

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International Journal of Mining science and Technology 2025年第2期35卷 213-229页

作者： Botao Li Haifei Lin Jianping Wei Hongtu Zhang Shugang Li Zongyong Wei Lei Qin Pei Wang Rongwei Luo Zeran Liu School of Safety Science and Engineering Henan Polytechnic UniversityJiaozuo 454003China State Key Laboratory Cultivation Base for Gas Geology and Gas Control Henan Polytechnic UniversityJiaozuo 454003China State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization Henan Polytechnic UniversityJiaozuo 454003China College of Safety Science and Engineering Xi’an University of Science and TechnologyXi’an 710054China Key Laboratory of Shaanxi Province Universities of Gas Disaster Prevention and Control in Western Coal Mines Xi’an 710054China

To more accurately describe the coal damage and fracture evolution law during liquid nitrogen(LN_(2))fracturing under true triaxial stress,a thermal-hydraulic-mechanical-damage(THMD)coupling model for LN_(2) fracturing coal was developed,considering the coal heterogeneity and thermophysical parameters of *** accuracy and applicability of model were verified by comparing with LN_(2) injection pre-cooling and fracturing experimental *** effects of different pre-cooling times and horizontal stress ratios on coal damage evolution,permeability,temperature distribution,and fracture characteristics were *** results show that the permeability and damage of the coal increase exponentially,while the temperature decreases exponentially during the fracturing *** the pre-cooling time increases,the damage range of the coal expands,and the fracture propagation becomes more *** initiation pressure and rupture pressure decrease and tend to stabilize with longer precooling *** the horizontal stress ratio increases,fractures preferentially extend along the direction of maximum horizontal principal stress,leading to a significant decrease in both initiation and rupture *** a horizontal stress ratio of 3,the initiation pressure drops by 48.07%,and the rupture pressure decreases by 41.36%.The results provide a theoretical basis for optimizing LN_(2) fracturing techniques and improving coal seam modification.

关键词： Liquid nitrogen fracturing Thermal–hydraulic-mechanical-damage coupling Heterogeneous coal True triaxial stress Fracture morphology

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Conditional Disturbance Compensation-Based Fault-Tolerant Group Consensus control for MASs: An Event-Based Switching Method

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IEEE Transactions on Automation science and engineering 2025年 22卷 13828-13841页

作者： Liu, Pei-Ming Guo, Xiang-Gui Wang, Jian-Liang Che, Wei-Wei Wu, Zheng-Guang University of Science and Technology Beijing Beijing Engineering Research Center of Industrial Spectrum Imaging School of Automation and Electrical Engineering Beijing100083 China University of Science and Technology Beijing Shunde Innovation School Foshan528000 China Beihang University Hangzhou Innovation Institute Autonomous Intelligent Systems Department Hangzhou310051 China Northeastern University College of Information Science and Engineering Shenyang266071 China Zhejiang University State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Hangzhou310027 China

With respect to the group consensus control for multi-agent systems (MASs) with disturbances and actuator nonidentical and unknown direction faults (NUDFs), this paper proposes a novel fault-tolerant control scheme by incorporating an event-based switching function and a saturation function. The event-based switching function is implemented to directly switch to the desired working mode, thereby reducing invalid switching after a reverse fault. Concurrently, the saturation function, acting at the software level, can not only prevent the instantaneous impact of excessive reverse input caused by a reverse fault, but also eliminate input peaking and state chattering after switching the working mode. It is worth mentioning that the proposed switching-based fault-tolerant control method can avoid the control chocks and excessive control gains as in the existing methods by using Nussbaum functions and thus improve the transient performance. Additionally, for disturbances, the designed conditional disturbance compensation mechanism ensures a smaller steady-state error, and less energy consumption by utilizing beneficial disturbances and compensating for harmful ones. Besides, the conditional compensation mechanism also reduces the saturation error. Finally, the effectiveness of the proposed control scheme are verified through a simulation example of uncrewed aerial vehicles (UAVs). © 2004-2012 IEEE.

关键词： Unmanned aerial vehicles (UAV)

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