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Partially coherent vortex beams:Fundamentals and applications

Science China(Physics,Mechanics & Astronomy) 2021年第2期64卷 32-50页

作者： miao dong ChengLiang Zhao YangJian Cai YuanJie Yang School of Physics University of Electronic Science and Technology of ChinaChengdu611731China School of Physical Science and Technology Soochow UniversitySuzhou215006China Shandong Provincial Engineering and Technical Centre of Light Manipulations&Shandong Provincial Key Laboratory of Optics and Photonic Device School of Physics and ElectronicsShandong Normal UniversityJinan250014China

It has been over 30 years since the concept of optical vortices was first proposed by Coullet et *** 1989,and the field of structured beams has grown *** the last two decades,partially coherent vortex beams(PCVBs)have received increasing interest in the fields of optical manipulation,optical communication,optical imaging,etc.,and great progress has been made in the area of the coherence singularities,generation methods,topological charge measurements,and promising applications of *** this review,we firstly outline the basic concepts of *** explicate the relationship between the coherence vortices and optical vortices,and the evolution behavior of optical vortices to coherence vortices is summarized in *** discuss a special form of coherence singularity,ring dislocation,mathematically and *** ring dislocation in the correlation functions under low coherence is dependent on the mode indices,which provide a feasible approach to measure mode indices of ***,we summarize the various methods for measuring the topological charge of PCVBs,highlight the measurement method based on the cross-correlation function,and a physical explanation on the relation between ring dislocation and topological charge is *** that,we review the recent advances on experimental generation of several kinds of ***,we give an overview on the potential applications of PCVBs.

关键词： coherence singularities coherence vortices vortex beams topological charge

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Imbalanced rock burst assessment using variational autoencoder-enhanced gradient boosting algorithms and explainability

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Underground Space 2024年第4期17卷 226-245页

作者： Shan Lin Zenglong Liang miao dong Hongwei Guo Hong Zheng Key Laboratory of Urban Security and Disaster Engineering Ministry of EducationBeijing University of TechnologyBeijing 100124China Department of Civil and Environmental Engineering The Hong Kong Polytechnic University(PolyU)Hung HomKowloon 999077Hong KongChina

We conducted a study to evaluate the potential and robustness of gradient boosting algorithms in rock burst assessment,established a variational autoencoder(VAE)to address the imbalance rock burst dataset,and proposed a multilevel explainable artificial intelligence(XAI)tailored for tree-based ensemble *** collected 537 data from real-world rock burst records and selected four critical features contributing to rock burst ***,we employed data visualization to gain insight into the data’s structure and performed correlation analysis to explore the data distribution and feature ***,we set up a VAE model to generate samples for the minority class due to the imbalanced class *** conjunction with the VAE,we compared and evaluated six state-of-theart ensemble models,including gradient boosting algorithms and the classical logistic regression model,for rock burst *** results indicated that gradient boosting algorithms outperformed the classical single models,and the VAE-classifier outperformed the original classifier,with the VAE-NGBoost model yielding the most favorable *** to other resampling methods combined with NGBoost for imbalanced datasets,such as synthetic minority oversampling technique(SMOTE),SMOTE-edited nearest neighbours(SMOTE-ENN),and SMOTE-tomek links(SMOTE-Tomek),the VAE-NGBoost model yielded the best ***,we developed a multilevel XAI model using feature sensitivity analysis,Tree Shapley Additive exPlanations(Tree SHAP),and Anchor to provide an in-depth exploration of the decision-making mechanics of VAE-NGBoost,further enhancing the accountability of treebased ensemble models in predicting rock burst occurrences.

关键词： Gradient boosting VAE Ensemble learning Explainable artificial intelligence(XAI) Rock burst

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Journal of Ocean University of China 2023年第4期22卷 939-948页

作者： YU Lei ZHANG Jian dong miao FANG Gui Yu Lupeng Shandong Key Laboratory of Water and Soil Conservation and Environmental Protection School of Resources and EnvironmentLinyi UniversityLinyi 276000China University of Chinese Academy of Sciences Beijing 100049China Institute of Geology and Geophysics Chinese Academy of ScienceBeijing 100029China

The bidirectional subduction system,island arc magmatic activities,and thermal structure of the forearc basin in the Molucca Sea are taken into consideration in this *** active volcanic arcs on both sides of the bidirectional subduction zone in the Molucca Sea are undergoing arc-arc *** applied a finite element thermal simulation method to reconstruct the thermal evolution history of the Molucca Sea Plate based on geophysical ***,we analyzed the thermodynamic characteristics of island arc volcanism on both sides of the bidirectional subduction *** results showed that at 10Myr,the oceanic ridge of the Molucca Sea Plate was asymmetrically biased to the west,causing this bidirectional subduction to be deeper in the west than in the ***,the oceanic ridge subducted under the Sangihe arc at 5.5Myr,causing intermittent cessation of volcanic *** to the convergence of bidirectional subduction,the geothermal gradient in the top 3km depth of the forearc area between the Sangihe and Halmahera arcs decreased from about 60℃km^(−1) at 4Myr to about 38℃km^(−1) ***,within the 45–100 km depth range of the sliding surface of the subduction,anomalously high-temperature zones formed due to shear friction during the bidirectional subduction.

关键词： Molucca Sea bidirectional subduction zone arc thermal simulation:island-arc magmatism

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Interpretable gradient boosting based ensemble learning and African vultures optimization algorithm optimization for estimating deflection induced by excavation

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FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING 2024年第11期18卷 1698-1712页

作者： Liang, Zenglong Lin, Shan dong, miao Cao, Xitailang Guo, Hongwei Zheng, Hong Beijing Univ Technol Key Lab Urban Secur & Disaster Engn Minist Educ Beijing 100124 Peoples R China Hong Kong Polytech Univ PolyU Dept Civil & Environm Engn Hong Kong 999077 Peoples R China

Intelligent construction has become an inevitable trend in the development of the construction industry. In the excavation project, using machine learning methods for early warning can improve construction efficiency and quality and reduce the chances of damage in the excavation process. An interpretable gradient boosting based ensemble learning framework enhanced by the African Vultures Optimization Algorithm (AVOA) was proposed and evaluated in estimating the diaphragm wall deflections induced by excavation. We investigated and compared the performance of machine learning models in predicting deflections induced by excavation based on a database generated by finite element simulations. First, we exploratively analyzed these data to discover the relationship between features. We used several state-of-the-art intelligent models based on gradient boosting and several simple models for model selection. The hyperparameters for all models in evaluation are optimized using AVOA, and then the optimized models are assembled into a unified framework for fairness assessment. The comprehensive evaluation results show that the AVOA-CatBoost built in this paper performs well (RMSE = 1.84, MAE = 1.18, R2 = 0.9993) and cross-validation (RMSE = 2.65 +/- 1.54, MAE = 1.17 +/- 0.23, R2 = 0.998 +/- 0.002). In the end, in order to improve the transparency and usefulness of the model, we constructed an interpretable model from both global and local perspectives.

关键词： African vultures optimization algorithm gradient boosting ensemble learning interpretable model wall deflection prediction

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Recommendations for articles and reviews in colorectal cancerrelated research at the year-end of 2023

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World Journal of Gastroenterology 2024年第30期30卷 3548-3553页

作者： Wen-Yu Luan Hao Lin Yan-dong miao Department of Cancer Center The Yantai Affiliated Hospital of Binzhou Medical UniversityThe Second Medical College of Binzhou Medical UniversityYantai 264100Shandong ProvinceChina

As peer reviewers of the World Journal of Gastroenterology,our weekly routine involves immersing ourselves in the newly published issue,particularly focusing on the realm of colorectal cancer(CRC)*** diligently sift through various contributions,ranging from comprehensive reviews to original articles and other scholarly *** meticulous examination,we discern the most notable papers,delving into each with careful scrutiny to distill their merits and ***,this undertaking demands considerable time and ***,it stands as an indispensable pursuit,affording us a profound comprehension of the latest breakthroughs in CRC ***,these meticulously curated selections furnish readers with invaluable resources,serving as enduring references for the nuanced exploration of this dynamic field.

关键词： Colorectal cancer Molecular mechanism Genetic marker Application of new technologies Diagnosis Treatment

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Metabolism-associated genes in occurrence and development of gastrointestinal cancer:Latest progress and future prospect

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World Journal of Gastrointestinal Oncology 2021年第8期13卷 758-771页

作者： Yan-dong miao Lin-Jie Mu Deng-Hai Mi The First Clinical Medical College Lanzhou UniversityLanzhou 730000Gansu ProvinceChina The First Affiliated Hospital Kunming Medical UniversityKunming 650000Yunnan ProvinceChina Dean’s Office Gansu Academy of Traditional Chinese MedicineLanzhou 730000Gansu ProvinceChina

Gastrointestinal(GI)cancer remains one of the most prevalent cancers in the *** occurrence and progression of GI cancer involve multiple *** reprogramming is one of the hallmarks of cancer and is intricately related to *** metabolic genes are involved in the occurrence and development of GI *** approaches combining tumor genomics and metabolomics are more likely to provide deeper insights into this *** this paper,we review the roles of metabolism-associated genes,especially those involved in the regulation pathways,in the occurrence and progression of GI *** provide the latest progress and future prospect into the different molecular mechanisms of metabolism-associated genes involved in the occurrence and development of GI cancer.

关键词： Gastrointestinal cancer Gastric cancer Colorectal cancer Metabolismassociated genes

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Investigation of geothermal structure of the Sulawesi,using gravity and magnetic method

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Science China Earth Sciences 2021年第2期64卷 278-293页

作者： Jian ZHANG Tianyao HAO miao dong Ya XU Beiyu WANG Yifei AI Gui FANG University of Chinese Academy of Sciences Beijing 100049China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China

The Sulawesi Sea and Sulawesi Island are located in the western Pacific area where volcanic activity,plate subduction,and seismic activity are very *** Sulawesi basin formed during the Middle Eocene-Late Eocene and nearly half of the Eocene oceanic crust has subducted below the North Sulawesi *** Sulawesi Island was spliced and finalized in the Early Pliocene-Pleistocene during volcanic activity and is recently very *** area is an optimal location to study volcanic geothermal conditions and subduction initiation mechanisms in the southern part of the western Pacific plate margin,which are important in geothermal and geodynamic *** this study,we combined 133 heat flow data with gravity and magnetic data to calculate the Moho structure and Curie point depth of the Sulawesi Sea and periphery of the Sulawesi Island,and analyze the distribution characteristics of the geothermal gradient and thermal *** results show that the average depths of the Moho and Curie surfaces in this area are 18.4 and 14.3 km,respectively,which is consistent with the crustal velocity layer structure in the Sulawesi Basin previously determined by seismic *** average geothermal gradient is 4.96°C(100 m)-*** oceanic area shows a high geothermal gradient and low thermal conductivity,whereas the land area shows a low geothermal gradient and high thermal conductivity,both of which are consistent with statistical results of the geothermal gradient at the measured heat flow *** highest geothermal gradient zone occurs in the transition zone from the Sulawesi Sea to Sulawesi Island,corresponding to the spreading ridge of the southward-moving Sulawesi *** gravity,magnetic,and geothermal studies have shown a high crustal geothermal gradient in the study area,which is conducive to the subduction *** northern part of the Palu-koro fault on the western side of Sulawesi is likely the location where subduction initiation i

关键词： Sulawesi Sea and Sulawesi Island Gravity and geothermal gradient Thermal crust Moho and Curie point depth Subduction retreat and sinistral strike-slip

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Wind tunnel experiments on dust emissions from different landform types

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Journal of Arid Land 2018年第4期10卷 548-560页

作者： WU Wei YAN Ping WANG Yong dong miao MENG Xiaonan JI Xinran Faculty of Geographical Science Beijing Normal University State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University

The measurement and assessment of dust emissions from different landforms are important to understand the atmospheric loading of PM10 （particulate matter ≤10 μm aerodynamic diameter） and to assess natural sources of dust; however, the methodology and technique for determining the dust still present significant research challenges. In the past, specialized field observation and field wind tunnel studies have been used to understand the dust emission. A series of wind tunnel tests were carried out to identify natural sources of dust and measure the magnitudes of dust emissions from different landforms. The method used in this study allowed the measurement of the PM10 emission rate using a laboratory based environmental boundary layer wind tunnel. Results indicated that PM10 emissions demonstrated strong temporal variation and were primarily driven by aerodynamic entrainment. Sand dunes, playa, and alluvial fans had the largest dust emission rates （0.8-5.4 mg/（me.s）） while sandy gravel, Gobi desert and abandoned lands had the lowest emission rates （0.003-0.126 mg/（m2.s））. Dust emissions were heavily dependent on the surface conditions, especially the availability of loose surface dust. High dust emissions were a result of the availability of dust- particle materials for entrainment while low dust emissions were a result of surface crusts and gravel cover. Soil surface property （surface crusts and gravel cover） plays an important role in controlling the availability of dust-sized particles for entrainment. The dust emission rate depended not only on the surface conditions but also on the friction velocity. The emission rate of PM10 varies as a power function of the friction velocity. Although dynamic abrasion processes have a strong influence on the amount of dust entrainment, aerodynamic entrainment may provide an important mechanism for dust emissions. Large volumes of dust entrained by aerodynamic entrainment cannot only occur at low shear velocity without saltation,

关键词： emission rates PMIO fugitive dust landforms wind tunnel dust dynamics

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Comment on“Outcomes of curative liver resection for hepatocellular carcinoma in patients with cirrhosis”

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World Journal of Gastrointestinal Oncology 2022年第1期14卷 366-368页

作者： Xiao-Long Tang Yan-dong miao Deng-Hai Mi The First Clinical Medical College Lanzhou UniversityLanzhou 730000Gansu ProvinceChina The Second Department of Gastrointestinal Surgery Affiliated Hospital of North Sichuan Medical CollegeNanchong 637000Sichuan ProvinceChina Dean's Office Gansu Academy of Traditional Chinese MedicineLanzhou730000Gansu ProvinceChina

The present letter to the editor is in response to the research“Outcomes of curative liver resection for hepatocellular carcinoma in patients with cirrhosis”by Elshaarawy et al in World J Gastroenterol 2021;13(5):424–*** preoperative assessment of the liver reserve function in hepatocellular carcinoma(HCC)patients with cirrhosis is crucial,and there is no universal consensus on how to assess *** on a retrospective study,Elshaarawy et al investigated the impact of various classical clinical indicators on liver failure and the prognosis after hepatectomy in HCC patients with *** recommend that we should strive to explore new appraisal indicators,such as the indocyanine green retention rate at 15 min.

关键词： ICG-R15 Hepatectomy Cirrhosis Hepatocellular carcinoma

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Comment on“Diagnostic approach to faecal incontinence:What test and when to perform?”

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World Journal of Gastroenterology 2021年第33期27卷 5622-5624页

作者： Jiang-Tao Wang Yan-dong miao Quan-Lin Guan The First Clinical Medical College of Lanzhou University Lanzhou UniversityLanzhou 730000Gansu ProvinceChina Department of Oncology The First Hospital of Lanzhou UniversityLanzhou UniversityLanzhou 730000Gansu ProvinceChina

We recently read with interest the article"Diagnostic approach to faecal incontinence:What test and when to perform?".This is a comprehensive and practical review,which has particular significance for guiding clinicians to improve the examination *** we appreciate their work very much,based on the in-depth analysis of this research,we found some detailed problems in the article and will give our comments in this *** the author can further improve the relevant research,it will be valuable.

关键词： Faecal Incontinence Manometry Diagnostic Pathophysiology Tools

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