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Hybrid stacking ensemble algorithm and simulated annealing optimization for stability evaluation of underground entry-type excavations

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Underground space 2024年第4期17卷 25-44页

作者： Leilei Liu Guoyan zhao Weizhang Liang Zheng Jian school of Resources and safety Engineering Central South UniversityChangsha 410083China

The stability of underground entry-type excavations(UETEs)is of paramount importance for ensuring the safety of mining *** more engineering cases are accumulated,machine learning(ML)has demonstrated great potential for the stability evaluation of *** this study,a hybrid stacking ensemble method aggregating support vector machine(sVM),k-nearest neighbor(KNN),decision tree(DT),random forest(RF),multilayer perceptron neural network(MLpNN)and extreme gradient boosting(XGBoost)algorithms was proposed to assess the stability of ***,a total of 399 historical cases with two indicators were collected from seven ***,to pursue better evaluation performance,the hyperparameters of base learners(sVM,KNN,DT,RF,MLpNN and XGBoost)and meta learner(MLpNN)were tuned by combining a five-fold cross validation(CV)and simulated annealing(sA)*** on the optimal hyperparameters configuration,the stacking ensemble models were constructed using the training set(75%of the data).Finally,the performance of the proposed approach was evaluated by two global metrics(accuracy and Cohen’s Kappa)and three within-class metrics(macro average of the precision,recall and F1-score)on the test set(25%of the data).In addition,the evaluation results were compared with six base learners optimized by *** hybrid stacking ensemble algorithm achieved better comprehensive performance with the accuracy,Kappa coefficient,macro average of the precision,recall and F1-score were 0.92,0.851,0.885,0.88 and 0.883,*** rock mass rating(RMR)had the most important influence on evaluation ***,the critical span graph(CsG)was updated based on the proposed model,representing a significant improvement compared with the previous *** study can provide valuable guidance for stability analysis and risk management of ***,it is necessary to consider more indicators and collect more extensive and balanced dataset to validate the model in futur

关键词： Underground entry-type excavations(UETEs) Hybrid stacking ensemble Machine learning simulated annealing Critical span graph Base and meta learners

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stability analysis and stabilization of semi-Markov jump linear systems with unavailable sojourn-time information

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science China(Information sciences) 2024年第7期67卷 211-223页

作者： Xiaotai WU Yang TANG shuai MAO Ying zhao school of Mathematics and physics Anhui Polytechnic University Key Laboratory of Advanced Control and Optimization for Chemical processes Ministry of EducationEast China University of Science and Technology

This study addresses the stability and stabilization problems of discrete-time semi-Markov jump linear systems(s-MJLss) with unavailable sojourn-time information. The sojourn-time probability mass functions(s-TpMFs) of discrete-time semi-Markov chains are no longer confined to the geometric distribution, and it is difficult to obtain accurate and comprehensive information for s-TpMFs in practice. This is because s-TpMFs are usually deduced from the statistical characteristics according to the sampled-data, while adequate samples are often costly and time consuming. In this study, when the s-TpMFs for semi-Markov chains are assumed to be unavailable, the σ-error mean square stability is investigated for discrete-time s-MJLss with some widely used assumptions; for semi-Markov chains, only the transition probability matrix of the embedded chain is used. In addition, the existence conditions of the effective controller are provided for closed-loop systems without using the information of s-TpMFs. Numerical examples are presented to illustrate the validity of the obtained theoretical results.

关键词： semi-Markov chain semi-Markov jump linear systems $\sigma$-error mean square stability unavailable sojourn-time information

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Adaptive 5G-and-beyond network-enabled interpretable federated learning enhanced by neuroevolution

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science China(Information sciences) 2024年第7期67卷 107-132页

作者： Bin CAO Jianwei zhao Xin LIU Yun LI state Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology school of Artificial Intelligence Hebei University of Technology school of Economics and Management Hebei University of Technology Industrial Artificial Intelligence Centre Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of China

Mobile telemedicine systems based on the next-generation communication will significantly enhance deep fusion of network automation and federated learning(FL), but data privacy is a paramount issue in sectors like healthcare. This work hence considers FL augments 5G-and-beyond networks by training deep learning(DL) models without the need to exchange raw data. The substantial communication loads imposed on by extensive parameters involved in DL models are managed through adaptive scheduling mechanisms effectively. To address the opaque nature of DL models and to improve the interpretability of FL models, we introduce a convolutional fuzzy rough neural network specifically designed for medical image processing. We also develop a multiobjective memetic evolutionary algorithm to streamline and optimize the neural network architectures. Our comprehensive FL framework integrates smart scheduling, interpretable fuzzy rough logic,and neuroevolution. This framework is shown to improve communication efficiency, increase interpretability of diagnosis with protected privacy, and generate low-complexity neural architectures.

关键词： 5G-and-beyond network interpretable federated learning mobile telemedicine system fuzzy rough set theory neuroevolution

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Multi-class classification of pathological myopia based on fundus photography

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Journal of Innovative Optical Health sciences 2024年第6期17卷 125-136页

作者： Jiaqing zhao Guogang Cao Jiangnan He Cuixia Dai shanghai Institute of Technology No.100 Haiquan RoadFengxian DistrictShanghaiP.R.China shanghai Eye Diseases prevention&Treatment Center Shanghai Eye HospitalSchool of MedicineTongji UniversityShanghai 200331P.R.China

pathological myopia(pM)is a severe ocular disease leading to *** a traditional noninvasive diagnostic method,fundus color photography(FCp)is widely used in detecting pM due to its highfidelity and ***,manual examination of fundus photographs for pM is time-consuming and prone to high error *** automated detection technologies have yet to study the detailed classification in diagnosing different stages of pM *** this paper,we proposed an intelligent system which utilized Resnet101 technology to multi-categorically diagnose pM by classifying FCps with different stages of *** system subdivided different stages of pM into eight subcategories,aiming to enhance the precision and e±ciency of the diagnostic *** achieved an average accuracy rate of 98.86%in detection of pM,with an area under the curve(AUC)of 98.96%.For the eight subcategories of pM,the detection accuracy reached 99.63%,with an AUC of 99.98%.Compared with other widely used multi-class models such as VGG16,Vision Transformer(VIT),E±cientNet,this system demonstrates higher accuracy and *** artificial intelligence system is designed to be easily integrated into existing clinical diagnostic tools,providing an e±cient solution for large-scale pM screening.

关键词： Fundus color photography pathological myopia deep learning Resnet101.

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Meromorphic Functions sharing Two Values

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Wuhan University Journal of Natural sciences 2024年第1期29卷 7-12页

作者： zhao Ying HUANG Zhigang school of Mathematical sciences Suzhou University of Science and TechnologySuzhou 215009JiangsuChina

Let f and g be two nonconstant meromorphic functions,and n be a positive *** f^(n)(z)and g^(n)(z)share 1 CM(counting multiplicities),f(z)and g(z)share∞IM(ignoring multiplicities),and N(r,1f)+N(r,1g)=s(r,f)+s(r,g),then either f(z)≡tg(z)or f(z)g(z)≡t,where t^(n)=*** an application,shared values problems of a meromorphic function related to its shifts and difference operators are also investigated.

关键词： meromorphic function shared values difference operator shift

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Age-specific distribution of oculometric parameters and myopia in children aged 8-12y

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International Journal of Ophthalmology(English edition) 2024年第10期17卷 1887-1897页

作者： Tao Tang si-Tong Chen Heng zhao Kai Wang Ming-Wei zhao Department of Ophthalmology&Clinical Centre of Optometry Peking University People’s HospitalBeijing 100044China Institute of Medical Technology Peking University Health Science CenterBeijing 100083China College of Optometry Peking University Health Science CenterBeijing 100083China Eye Disease and Optometry Institute Peking University People’s HospitalBeijing 100044China Beijing Key Laboratory of the Diagnosis and Therapy of Retinal and Choroid Diseases Beijing 100044China National Clinical Research Center for Ocular Diseases Eye HospitalWenzhou Medical UniversityWenzhou 325027Zhejiang ProvinceChina

AIM:To describe the distribution of ocular biometrics and to evaluate its associations with refractive error and to assess the contribution from ocular parameters to refractive error among Chinese myopic ***:This cross-sectional study evaluated subjects aged ***,ocular biometry,and cycloplegic autorefraction were performed on each *** equivalent refraction(sER)and ocular biometrics were assessed as a function of age and *** pearson correlation analysis between sER and ocular biometrics was carried *** linear regression was performed to analyze the association between sER and ocular ***:A total of 689 out of 735 participants(321 boys,48.1%)were analyzed,with a mean sER of-2.98±1.47 diopter(D).Axial length(AL),anterior chamber depth(ACD),corneal radius of curvature(CR),horizontal visible iris diameter(HVID),central corneal thickness(CCT)and lens power(Lp)showed normal *** AL,AL/CR ratio,ACD and CR increased from 8 to 12y of age,while sER and Lp decreased,HVID and CCT remained *** was no difference in *** decreased by 0.929 D for every 1 mm increase in AL and decreased by 1.144 D for every 0.1 increase in AL/CR *** pearson correlation coefficient between sER and AL was-0.538(ppsER and AL/CR *** the sER variance,AL explained 29.0%,AL/CR ratio explained 55.7%,while AL,CR,ACD and Lp explained 99.3%after adjusting for age and ***:The AL,CR,ACD and Lp are the most important determinants of myopic refractive error during myopia progression.

关键词： myopia ocular biometry refractive error population-based study

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Electronic control seed-metering system for precision seeding maize based on fuzzy pID

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International Journal of Agricultural and Biological Engineering 2024年第4期17卷 217-226页

作者： Xiaoshun zhao Hongpeng zhao Zehe Wang Jincai Li Huali Yu Qing Yan state Key Laboratory of North China Crop Improvement and Regulation Hebei Agricultural UniversityBaoding 071001HebeiChina College of Mechanical and Electrical Engineering Hebei Agricultural UniversityBaoding 071001HebeiChina

Aiming at the problem of poor uniformity of maize sowing caused by ground wheel slip,an electronic control seed-metering system(ECsMs)for maize single seed precision sowing was designed and a mathematical model for motor control of the ECsMs was *** pID parameters were set by Z-N method and fuzzy *** fuzzy pID control design and simulink simulation were completed by MATLAB,which reduced response time of the system by 0.23 s and improved the control *** on the Jps-12 test bench show that the qualification index(QI)of maize seed-metering device with the ECsMs increases by 4.47%,the multiples index(MI)decreases by 1.96%,the miss index(MIX)decreases by 2.81%,and the coefficient of variation(CV)of qualified seed spacing decreases by 5.06%,and the sowing uniformity has been greatly *** results of the soil-tank test bench show that the system has good sowing uniformity and *** the QI is 96.74%,the MI is 2.15%,the MIX is 1.10%,and the CV of qualified seed spacing is 16.24%.Under different setting seed spacing and different sowing operation speed,the change range of seeding quality index was within 10%.The results of field sowing test show that the QI was 84.21%,the MI was 2.63%,the MIX was 7.89%,and the CV of qualified seed spacing was 22.15%,which meet the requirements of JB/T 10293-2013‘specification for single seed planters(precision planters)’and the agronomic requirements for maize precision *** system runs stably and reliably in practical operation and has good operation performance.

关键词： maize seed-metering system electronic control precision sowing parameters tuning fuzzy pID control simulink simulation

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CuIns_(2)quantum-dot-modified g-C_(3)N_(4)s-scheme heterojunction photocatalyst for hydrogen production and tetracycline degradation

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Journal of Materials science & Technology 2024年第5期172卷 145-155页

作者： Jingjing Zhang Yue zhao Kezhen Qi shu-yuan Liu College of pharmacy Dali UniversityDali 671000China Department of pharmacology Shenyang Medical CollegeShenyang 110034China

CuIns_(2)quantum-dot(CIs QD)-modified g-C_(3)N_(4)(CN)catalysts(CIs/CN)were prepared with the aid of an in-situ growth *** as-obtained photocatalysts were explored by measuring their crystallinity,surface morphology,binding energy and light absorption *** photocatalytic efficiency of the pho-tocatalysts was evaluated through photocatalytic water splitting for hydrogen production and tetracycline(TC)antibiotic degradation under the simulated solar light and visible light *** optimized sample(10CIs/CN)showed the best photocatalytic activity:producing 102.4μmol g^(-1)h^(-1)of hydrogen in 1 h,or degrading 52.16%of TC in 120 min,which were respectively 48 or 3.4 times higher than the photocatalytic activity of CN *** enhancement in the efficiency of the composite system was prin-cipally accredited to the enlargement of light absorption,the more effective in charge transfer and the dropping of the charge carrier pair recombination through a formed s-scheme heterojunctional *** work is an effort to adjust CN-based polysulfide QD for speedy *** enriched photo-catalytic activity grants a new sense for adjusting the optical properties of CN.

关键词： CuIns_(2)QDs g-C_(3)N_(4) photocatalysis Hydrogen production s-scheme heterojunction

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suppression of multistep phase transitions of O3-type cathode for sodium-ion batteries

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Chinese Chemical Letters 2024年第5期35卷 453-458页

作者： shengyu zhao Qinhao shi Wuliang Feng Yang Liu Xinxin Yang Xingli Zou Xionggang Lu Yufeng zhao Institute for sustainable Energy&College of sciences Shanghai UniversityShanghai 200444China state Key Laboratory of Advanced special steel&shanghai Key Laboratory of Advanced Ferrometallurgy&school of Materials science and Engineering Shanghai UniversityShanghai 200444China

O3-type layered oxide cathodes have been widely investigated due to their high reversible capacities and sufficient Na+***,such materials usually suffer from complex multistep phase transitions along with drastic volume changes,leading to the unsatisfied cycle ***,we report a Mg/Ti co-doped O3-type NaNi_(0.5)Mn_(0.5)O_(2),which can effectively suppress the complex multistep phase transition and realize a solid-solution reaction within a wide voltage *** is confirmed that,the Mg/Ti co-doping is beneficial to enhance the structural stability and integrity by absorbing micro-strain and ***,the as obtained sample delivers an outstanding cyclic performance(82.3%after 200 cycles at 1 C)in the voltage range of 2.0-4.0 V,and a high discharge capacity of 86.6 mAh/g after 100 cycles within the wide voltage range(2.0-4.5 V),which outperform the existing *** co-doping strategy offers new insights into high performance O3-type cathode for sodium ion batteries.

关键词： sodium ion batteries Mg/Ti co-doping phase transition Cyclic performance High voltage performance

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Heterostructure VO2@Vs2 tailored by one-step hydrothermal synthesis for stable and highly efficient Zn-ion storage

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Materials Futures 2024年第4期3卷 171-180页

作者： Enyan zhao Kesheng Gao Xuan Luo Lin Li Jinkui zhao Hongliang Li College of Materials science and Engineering Qingdao UniversityQingdao 266071People’s Republic of China songshan Lake Materials Laboratory Dongguan 523808People’s Republic of China Beijing National Laboratory for Condensed Matter physics Institute of PhysicsChinese Academy of SciencesBeijing 100190People’s Republic of China school of physical sciences Great Bay UniversityDongguan 523808People’s Republic of China

The increasing demand for advanced energy storage solutions has driven extensive research into Zn-ion batteries due to their safety,cost-effectiveness,and environmental *** study presents a synthesis and evaluation of VO2@Vs2 hollow nanospheres as a novel cathode material for Zn-ion *** VO2@Vs2 composite,synthesized via a one-step hydrothermal method,demonstrates a significant improvement in electrochemical *** material exhibits a reversible capacity of 468 mAh g-1 at 0.1 A g-1 and maintains a high capacity of 237 mAh g-1 at 1.0 A g-1 over 1000 cycles with a retention rate of 85%.Electrochemical analyses reveal enhanced charge transfer and Zn-ion storage,attributed to the synergistic effect and built-in electric field of the VO2 and Vs2 ***,the composite shows superior electrochemical kinetics,facilitating rapid ion transport and charge ***-situ Raman analysis confirms the reversible Zn-ion storage mechanism,further validating the composite’s structural stability during *** functional theory calculations further support these findings,indicating the composite’s potential for high-rate capability and long-term cycling *** research highlights the promise of VO2@Vs2 hollow nanospheres in advancing the performance of aqueous Zn-ion batteries.

关键词： Zn-ion batteries vanadium-based cathode hollow nanospheres heterostructure pseudocapacitive

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