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Enhancing microseismic/acoustic emission source localization accuracy with an outlier-robust kernel density estimation approach

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International Journal of Mining Science and Technology 2024年第7期34卷 943-956页

作者： Jie Chen Huiqiong Huang Yichao rui Yuanyuan Pu Sheng Zhang zheng li Wenzhong Wang State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400044China School of Resources and Safety Engineering Chongqing UniversityChongqing 400044China School of Resources and Safety Engineering Central South UniversityChangsha 410083China Chongqing City Construction Investment Group Co. Ltd.Chongqing 400023China Coal Geological Exploration Institute of Gansu Lanzhou 730000China

Monitoring sensors in complex engineering environments often record abnormal data,leading to significant positioning *** reduce the influence of abnormal arrival times,we introduce an innovative,outlier-robust localization method that integrates kernel density estimation(KDE)with damping linear correction to enhance the precision of microseismic/acoustic emission(MS/AE)source *** approach systematically addresses abnormal arrival times through a three-step process:initial location by 4-arrival combinations,elimination of outliers based on three-dimensional KDE,and refinement using a linear correction with an adaptive damping *** validate our method through lead-breaking experiments,demonstrating over a 23%improvement in positioning accuracy with a maximum error of 9.12 mm(relative error of 15.80%)—outperforming 4 existing *** under various system errors,outlier scales,and ratios substantiate our method’s superior *** blasting experiments also confirm the practical applicability,with an average positioning error of 11.71 m(relative error of 7.59%),compared to 23.56,66.09,16.95,and 28.52 m for other *** research is significant as it enhances the robustness of MS/AE source localization when confronted with data *** also provides a practical solution for real-world engineering and safety monitoring applications.

关键词： Microseismic source/acoustic emission(MS/AE) Kernel density estimation(KDE) Damping linear correction Source location Abnormal arrivals

An M-Objective Penalty Function Algorithm Under Big Penalty Parameters

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Journal of Systems Science & Complexity 2016年第2期29卷 455-471页

作者： zheng Ying MENG Zhiqing SHEN rui Basic College Ningbo Dahongying University College of Economics and Management Zhejiang University of Technology

Some classical penalty function algorithms may not always be convergent under big penalty parameters in Matlab software,which makes them impossible to find out an optimal solution to constrained optimization *** this paper,a novel penalty function(called M-objective penalty function) with one penalty parameter added to both objective and constrained functions of inequality constrained optimization problems is *** on the M-objective penalty function,an algorithm is developed to solve an optimal solution to the inequality constrained optimization problems,with its convergence proved under some ***,numerical results show that the proposed algorithm has a much better convergence than the classical penalty function algorithms under big penalty parameters,and is efficient in choosing a penalty parameter in a large range in Matlab software.

关键词： Algorithm constrained optimization problem M-objective penalty function stability.

Cascade degradation and electrocatalytic upcycling of waste poly(ethylene terephthalate)to valued products

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Nano Research 2025年第1期18卷 76-93页

作者： Xin li Zirui Jiang Zongkui Kou John Wang Shiyou zheng School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Department of Materials Science and Engineering National University of SingaporeSingapore 117574Singapore

The global annual production of poly(ethylene terephthalate)(PET)has reached 82 million tons,yet only a small fraction(less than 20%)is *** ultra-slow degradation rate of PET results in the accumulation of PET waste in the environment,causing serious plastic pollution and posing severe challenges to *** response,great efforts have been directed toward developing a cascade degradation and electrocatalytic upcycling strategy,which serves as a“waste-towealth”*** strategy involves electro-reforming PEThydrolyzed intermediates or using PET pyrolyzed products as electrocatalysts to generate high-value *** review provides an overview of the state-of-the-art strategies for the“degradation-electrocatalytic upcycling(De-eUp)”of PET ***,an introduction to the strategy is provided,categorizing it into two main frameworks:“pyrolysis-electrocatalytic upcycling”and“hydrolysis-electrocatalytic upcycling”.The section on“pyrolysis-electrocatalytic upcycling”delves into the degradation methods for designing derived carbon nanomaterials and their utilization as high-performance ***“hydrolysis-electrocatalytic upcycling”section discusses recent advancements in electro-reforming of PET hydrolyzed intermediates for the production of C_(1) and C_(2) *** review concludes by examining the challenges and future prospects in developing an efficient and economical PET upcycling *** is anticipated that this review will stimulate further progress in plastic waste valorization.

关键词： poly(ethylene terephthalate)waste electrocatalytic upcycling pyrolysis hydrolysis ethylene glycol oxidation reaction

Construction and Application of Interfacial Inorganic Nanostructures

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Chinese Journal of Chemistry 2020年第7期38卷 772-786,I0002页

作者： rui Wang Yicheng Wei li An rui Yang linchuan Guo zheng Weng Pengfei Da Wenqing Chen Jing Jin Jianyi li Pinxian Xi State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhouGansu 730000China

Interfacial nanostructured materials have stimulated extensive interests in the research areas of green energy production and conversion due to their unique structures and *** interfacial crystalline structures with rich intrinsic defects,such as oxygen vacancies,adatoms,grain bounda-ries,and substitutional impurities,have led to unique activities in a variety of catalytic *** rational design and engineering development of the interfaces provide an attractive way to optimize the catalytic performance and finally improve the efficiency of energy conversion and ***,a comprehensive overview of interfacial inorganic nanostructures and their electrocatalytic applications are summarized,and some future challenge and opportunity have also been proposed.

关键词： interfacial attractive summarized

Dynamic conductivity modified by impurity resonant states in doping three-dimensional Dirac semimetals

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Frontiers of physics 2018年第2期13卷 175-183页

作者： Shuai li Chen Wang Shi-Han zheng rui-Qiang Wang Jun li Mou Yang Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials School of Physics and Telecommunication Engineering South China Normal University Guangzhou 510006 China School of Information Engineering Guangdong University of Technology Guangzhou 510006 China

The impurity effect is studied in three-dimensional Dirac semimetals in the framework of a T-matrix method to consider the multiple scattering events of Dirac electrons off impurities. It has been found that a strong impurity potential can significantly restructure the energy dispersion and the density of states of Dirac electrons. An impurity-induced resonant state emerges and significantly modifies the pristine optical response. It is shown that the impurity state disturbs the common longitudinal optical conductivity by creating either an optical conductivity peak or double absorption jumps, depending on the relative position of the impurity band and the Fermi level. More importantly, these conductivity features appear in the forbidden region between the Drude and interband transition, completely or partially filling the Pauli block region of optical response. The underlying physics is that the appearance of resonance states as well as the broadening of the bands leads to a more complicated selection rule for the optical transitions, making it possible to excite new electron-hole pairs in the forbidden region. These features in optical conductivity provide valuable information to understand the impurity behaviors in 3D Dirac materials.

关键词： Dirac semimetals impurity resonance states optical conductivity

A Deep Double-Channel Dense Network for Hyperspectral Image Classifica-tion

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Journal of Geodesy and Geoinformation Science 2021年第4期4卷 46-62页

作者： Kexian WANG Shunyi zheng rui li li GUI School of Remote Sensing and Information Engineering Wuhan UniversityWuhan 430079China School of Electronic Information Wuhan UniversityWuhan 430072China

Hyperspectral Image(HSI)classification based on deep learning has been an attractive area in recent ***,as a kind of data-driven algorithm,the deep learning method usually requires numerous computational resources and high-quality labelled datasets,while the expenditures of high-performance computing and data annotation are *** this paper,to reduce the dependence on massive calculation and labelled samples,we propose a deep Double-Channel dense network(DDCD)for Hyperspectral Image ***,we design a 3D Double-Channel dense layer to capture the local and global features of the *** we propose a linear Attention Mechanism that is approximate to dot-product attention with much less memory and computational *** number of parameters and the consumptions of calculation are observably less than contrapositive deep learning methods,which means DDCD owns simpler architecture and higher efficiency.A series of quantitative experiences on 6 widely used hyperspectral datasets show that the proposed DDCD obtains state-of-the-art performance,even though when the absence of labelled samples is severe.

关键词： 3D Double-Channel dense layer linear Attention Mechanism Deep Learning(DL) hyperspectral classification

Combustor design and performance prediction based on parametric model

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航空动力学报 2014年第4期29卷 748-754页

作者： li Feng SHANG Shou-tang GUO rui-qing CHENG Ming TANG zheng-fu SONG Bo School of Energy and Power Engineering Beijing University of Aeronautics and Astronautics Combustion Design Office Shenyang Engine Design and Research InstituteAviation Industry Corporation of China

By combining the three-dimensional model software and grid generation software,the combustor parametric model and high quality and high speed gridding in the full flow field has been *** on the research of the parametric modeling,an optimizing design,CFD analysis and performance prediction of the combustor have been accomplished,and the rule of the combustor performance variation with structural parameters was *** results show that the combustor capability has no significant change with the radial swirler parameters and the primary holes *** combustor capability has significant change with position and profile of the primary holes and dilution holes,and the combustor outlet temperature profile and emission change greatly when the total hole area of the burnerinnerliner *** parametric model method is helpful to provide a fast design method for the aero-engine combustor design.

关键词：经验模型航空动力设计涡旋设计航空设计

Modelling individual head-related transfer function(HRTF)based on anthropometric parameters and generic HRTF amplitudes

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CAAI Transactions on Intelligence Technology 2023年第2期8卷 364-378页

作者： rui Zhang ruijie Meng Jinqiu Sang Yi Hu Xiaodong li Chengshi zheng Key Laboratory of Noise and Vibration Research Institute of AcousticsChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina Shanghai Institute of AI for Education East China Normal UniversityShanghaiChina Department of Electrical Engineering and Computer Science University of Wisconsin–MilwaukeeMilwaukeeWisconsinUSA

The head-related transfer function(HRTF)plays a vital role in immersive virtual reality and augmented reality technologies,especially in spatial audio synthesis for binaural *** article proposes a deep learning method with generic HRTF amplitudes and anthropometric parameters as input features for individual HRTF *** designing fully convolutional neural networks,the key anthropometric parameters and the generic HRTF amplitudes were used to predict each individual HRTF amplitude spectrum in the full-space directions,and the interaural time delay(ITD)was predicted by the transformer *** the amplitude prediction model,the attention mechanism was adopted to better capture the relationship of HRTF amplitude spectra at two distinctive directions with large angle differences in ***,with the minimum phase model,the predicted amplitude spectrum and ITDs were used to obtain a set of individual head-related impulse *** the separate training of the HRTF amplitude and ITD generation models,their joint training was also considered and *** root-mean-square error and the log-spectral distortion were selected as objective measurement metrics to evaluate the *** experiments further showed that the auditory source localisation performance of the proposed method was better than other methods in most cases.

关键词： audio databases augmented reality deep learning multimedia

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英美文学教材与课程思政融合提质研究

外语学刊 2025年第1期 64-69页

作者：李正栓徐童歆河北师范大学外国语学院石家庄050024

教材是学科建设与专业发展的重要平台。近年来,英美文学教材资源日益丰富。然而,在思想内容的深度与广度上仍有进一步完善的空间。为了培养更具思辨能力和人文素养的新时代合格人才,须将课程思政元素融入英美文学教材与教学中,以便在中... 详细信息

教材是学科建设与专业发展的重要平台。近年来,英美文学教材资源日益丰富。然而,在思想内容的深度与广度上仍有进一步完善的空间。为了培养更具思辨能力和人文素养的新时代合格人才,须将课程思政元素融入英美文学教材与教学中,以便在中外文学比较、文化交流与文明互鉴中形成文化自信,高效实现为党育人、为国育才的崇高目标。通过对英美文学教材进行评介,使教材发挥核心作用,形成“教师—教材—学习者”之间的良性互动,构建价值塑造、知识传授和能力培养三位一体的教育模式,培育兼具国际视野与家国情怀的中国式现代化亟需人才。

关键词：英美文学教材文学功用课程思政