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三维地质建模技术与方法综述

工程地质学报 2024年第3期32卷 1143-1153页

作者：郭福钟郑博文祁生文李航朱焕春岳云艳谢焕忠加华地学(武汉)数字技术有限公司武汉430205 中国科学院地质与地球物理研究所页岩气与地质工程重点实验室北京100029 中国科学院大学地球与行星科学学院北京100049 中国科学院地质与地球物理研究所岩石圈演化与环境演变全国重点实验室北京100029 武汉大学武汉430072

三维地质建模是起源于工业领域计算机图形学引用到地学领域形成的三维数字化技术,地质体轮廓不规则性、特性的空间不均匀性、已知数据的稀疏性和认识过程的反复性决定了三维地质建模对图形几何算法和渲染技术的特殊要求,也决定了与其他... 详细信息

三维地质建模是起源于工业领域计算机图形学引用到地学领域形成的三维数字化技术,地质体轮廓不规则性、特性的空间不均匀性、已知数据的稀疏性和认识过程的反复性决定了三维地质建模对图形几何算法和渲染技术的特殊要求,也决定了与其他领域三维技术如GIS和BIM之间存在的基础性差别。针对我国基础建设领域工程地质三维地质建模技术类型繁多、良莠不齐的现实,本文系统性地阐述了三维地质建模的基础理论与核心技术、建模方法、应用功能实现与展望:(1)三维地质建模以离散数学理论为基础,插值算法是其中最关键的核心技术,文中介绍和对比分析了离散光滑(DSI)和克里金两种插值方法,从原理和应用的角度论证了DSI具有更好的适应性;(2)显式和隐式建模方法是核心技术针对不同场景形成的三维地质建模的通用方法,在工程地质领域分别适合于勘探为主和物探为主的情形,文中结合应用案例阐述了各自的特点;(3)应用功能是显式和隐式建模方法针对不同特点的地质体的应用方式,其中的通用型功能针对地层和构造等所有地学领域都涉及的地质体,定制化功能则针对行业关心的特定地质体(如水电行业的深切河谷岸坡卸荷带)且以提高建模效率为主要目的。本文通过对三维地质建模技术的阶段性总结,为未来发展提供有价值的技术指引,并将为三维工程地质体结构的透明化表征提供重要的技术支撑。

关键词：工程地质三维地质建模插值算法显式建模方法隐式建模方法

Fact-condition statements and super relation extraction for geothermic knowledge graphs construction

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Geoscience Frontiers 2023年第5期14卷 384-395页

作者： Qizhi Chen Hong Yao shengwen li Xinchuan li Xiaojun Kang Wenwen Lai Jian Kuang School of Computer Science China University of GeosciencesWuhan 430074China State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesWuhan 430074China School of Geography and Information Engineering China University of GeosciencesWuhan 430074China

Researchers utilize information from the geoscience literature to deduce the regional or global geological *** this process has relied on the labor of *** the number of papers continues to increase,acquiring domain-specific knowledge becomes a heavy *** Graph(KG)is proposed as a new knowledge representation technology to change this ***,the super relation is not considered in the previous KG,which bridges the geological phenomenon(fact)and its precondition(condition).For instance,in the statement(“the late Archean was a crucial transition period in the history of global geodynamics”),the condition statement(“crucial transition for global geodynamics”)works as the complementary fact statement(“the late Archean was a crucial transition period”),which defines the scale of crucial transition accurately in the late *** this study,fact-condition statement extraction is introduced to construct a geological knowledge graph.A rule-based multi-input multi-output model(R-MIMO)is proposed for information *** the R-MIMO,fact-condition statements and their super relation are considered and extracted for the first *** verify its performances,a GeothCF dataset with 1455 fact tuples and 789 condition tuples is *** experiments,the R-MIMO model achieves the best performance by using BERT as encoder and LSTM-d as decoder,achieving F180.24%in tuple extraction and F170.03%in tag prediction ***,the geothermic KG with super relation is automatically constructed for the first time by trained R-MIMO,which can provide structured data for further geothermic research.

关键词： Fact-condition statements Super relation Knowledge graph Rule-based multi-input multi-output model

lightweight Design of Commercial Vehicle Cab Based on Fatigue Durability

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Computer Modeling in Engineering & Sciences 2023年第7期136卷 421-445页

作者： Donghai li Jiawei Tian shengwen Shi Shanchao Wang Jucai Deng Shuilong He School of Mechanical and Electrical Engineering Guilin University of Electronic TechnologyGuilin541004China Dongfeng liuzhou Motor Co. Ltd.Liuzhou545005China

To better improve the lightweight and fatigue durability performance of the tractor cab,a multi-objective lightweight design of the cab was carried out in this ***,the finite element model of the cab with counterweight loading was established and then confirmed by the physical testing,and use the inertial reliefmethod to obtain stress distribution under unit *** cab-frame rigid-flexible couplingmulti-body dynamicsmodelwas built by Adams/car *** the cab airbag mount displacement and acceleration signals acquired on the proving ground as the desired signals and obtaining the fatigue analysis load spectrum through Femfat-Lab virtual *** fatigue simulation analysis is performed in nCode based on the Miner linear fatigue cumulative damage ***,with themass and fatigue damage values as the optimization objectives,the bending-torsional stiffness and first-order bending-torsional mode as constraints,the thickness variables are screed based on the sensitivity *** experimental design was carried out using the Optimal Latin hypercube method,and the multi-objective optimal design of the cab was carried out using theKriging approximationmodel fitting and particle *** weight of the optimized cab is reduced by 7.8%on the basis of meeting the fatigue durability ***,a seven-axis road simulation test rig was designed to verify its fatigue *** results show the optimized cab can consider both lightweight and durability.

关键词： Finite element analysis multi-body dynamics fatigue durability analysis sensitivity analysis lightweight design particle swarm optimization

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地铁综合监控系统数据统分平台应用研究

现代城市轨道交通 2024年第5期 39-46页

作者：刘建委张国明李镇文陈省文李宁广州地铁建设管理有限公司广东广州510250 广州新科佳都科技有限公司广东广州510700

随着地铁行业数字化的飞速发展,逐渐增加的海量数据使原有简单呈现方式无法满足运营管理需求。广州地铁18号、22号线采用综合监控系统数据统分平台进行数据管理,结合地铁业务需求,根据运营场景布局,凭借综合监控系统数据统分平台的大数... 详细信息

随着地铁行业数字化的飞速发展,逐渐增加的海量数据使原有简单呈现方式无法满足运营管理需求。广州地铁18号、22号线采用综合监控系统数据统分平台进行数据管理,结合地铁业务需求,根据运营场景布局,凭借综合监控系统数据统分平台的大数据处理及运算能力,按照客流、行车、能耗、环控及电力设备5个维度,适用于行业统计分析的各项指标可视化展示。平台的应用可提高地铁数据体系建设中数据管理的基础能力,为制订更科学合理的管理方法提供决策依据,从而全面提升管理和决策能力,不断促进地铁全面信息化建设、数字化转型,加速智慧地铁建设。

关键词：地铁综合监控数据可视化运营管理广州

Region-aware neural graph collaborative filtering for personalized recommendation

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International Journal of Digital Earth 2022年第1期15卷 1446-1462页

作者： shengwen li Renyao Chen Chenpeng Sun Hong Yao Xuyang Cheng Zhuoru li Tailong li Xiaojun Kang State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesWuhanPeople’s Republic of China School of Computer Science China University of GeosciencesWuhanPeople’s Republic of China School of Future Technology China University of GeosciencesWuhanPeople’s Republic of China National Engineering Research Center of Geographic Information System China University of GeosciencesWuhanPeople’s Republic of China

Personalized recommender systems have been widely deployed in various scenarios to enhance user experience in response to the challenge of information ***,personalized recommendation models based on graph structure have advanced greatly in predicting user ***,geographical region entities that reflect the geographical context of the items is not being utilized in previous works,leaving room for the improvement of personalized *** study proposes a region-aware neural graph collaborative filtering(RA-NGCF)model,which introduces the geographical regions for improving the prediction of user *** approach first characterizes the relationships between items and users with a user-item-region ***,a neural network model for the region-aware graph is derived to capture the higher-order interaction among users,items,and ***,the model fuses region and item vectors to infer user *** on real-world dataset results show that introducing region entities improves the accuracy of personalized *** study provides a new approach for optimizing personalized recommendation as well as a methodological reference for facilitating geographical regions for optimizing spatial applications.

关键词： Collaborative filtering neural graph collaborative filtering geographical region personalized recommendation graph convolution networks

Chemically Amplified Resist Based on Dendritic Molecular Glass for Electron Beam lithography

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Chemical Research in Chinese Universities 2023年第1期39卷 139-143页

作者： HU shengwen CHEN Jinping YU Tianjun ZENG Yi YANG Guoqiang li Yi Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190P.R.China Beijing National Laboratory for Molecular Sciences(BNLMS) Key Laboratory of PhotochemistryInstitute of ChemistryChinese Academy of SciencesBeijing100190P.R.China University of Chinese Academy of Sciences Beijing100049P.R.China

A novel dendritic molecular glass(MG)containing adamantane core(AD-15)was synthesized and *** exhibits good solubility in common organic solvents and a stable amorphous state at room temperature,which contributes to forming films with different thicknesses by *** thermal analysis of AD-15 indicates that no apparent glass transition temperature(Tg)is observed before the thermal decomposition temperature(Td=160℃).The good thermal resistance suggests that it can satisfy the lithographic process and is a candidate for photoresist *** patterning properties of AD-15 resist were evaluated by electron beam lithography(EBL).By optimizing the lithographic process parameters,AD-15 resist can achieve 40 nm half-pitch patterns with a line-edge roughness of 4.0 *** contrast and sensitivity of AD-15 resist were 1.9 and 67µC/cm^(2),*** with the commercial PMMA(950k)electron beam resist,the sensitivity of AD-15 resist increases by 6 *** study provides a new example of molecular glass resist with high resolution and sensitivity for EBL.

关键词： Dendritic molecule Molecular glass Chemically amplified resist Electron beam lithography

A branch current estimation and correction method for a parallel connected battery system based on dual BP neural networks

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Green Energy and Intelligent Transportation 2022年第2期1卷 112-123页

作者： Quanqing Yu Yukun liu shengwen Long Xin Jin Junfu li Weixiang Shen School of Automotive Engineering Harbin Institute of TechnologyWeihaiShandong 264209China School of New Energy Harbin Institute of TechnologyWeihaiShandong 264209China School of Science Computing and Engineering TechnologiesSwinburne University of TechnologyHawthornVictoria 3122Australia

In the actual use of a parallel battery pack in electric vehicles(EVs),current distribution in each branch will be different due to inconsistence characteristics of each battery *** the branch current is approximately calculated by the total current of the battery pack divided by the number of the parallel branches,there will be a large error between the calculated branch current and the real branch *** current sensors to measure each branch current is not practical because of the high *** estimation of branch currents can give a safety warning in time when the parallel batteries of EVs are seriously *** paper puts forward a method to estimate and correct branch currents based on dual back propagation(BP)neural *** the proposed method,one BP neural network is used to estimate branch currents,the other BP neural network is used to reduce the estimation error cause by current pulse ***,this paper makes discussions on the selection of the best inputs for the dual BP neural networks and the adaptability of the method for different battery capacity and resistence *** effectiveness of the proposed method is verified by multiple dynamic conditions of two cells connected in parallel.

关键词： BP neural Network Branch current estimation and correction Electric vehicles lithium-ion battery pack

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不同浓度IBA对锦绣紫扦插生根的影响

现代农业科技 2024年第1期 91-93,96页

作者：陈曦杨苑钊唐圣雯李秀石小庆成都市植物园/成都市公园城市植物科学研究院四川成都610083

锦绣紫是木芙蓉的一个优良品种,但在生产当中存在繁殖困难、繁殖系数低的问题。为了提高锦绣紫的繁殖效率,采用不同浓度吲哚丁酸(IBA)处理锦绣紫插穗,探讨不同浓度IBA对锦绣紫扦插生根效果的影响。结果表明:适宜浓度的IBA处理对锦绣紫... 详细信息

锦绣紫是木芙蓉的一个优良品种,但在生产当中存在繁殖困难、繁殖系数低的问题。为了提高锦绣紫的繁殖效率,采用不同浓度吲哚丁酸(IBA)处理锦绣紫插穗,探讨不同浓度IBA对锦绣紫扦插生根效果的影响。结果表明:适宜浓度的IBA处理对锦绣紫生根具有明显的促进作用,其中IBA 1200 mg/L处理锦绣紫的生根效果最佳,生根率达到93.33%,生根条数最多,最长新梢叶片总数为5.33片,IBA超过该浓度的处理对锦绣紫表现出明显的抑制作用。采用IBA 1200 mg/L浸泡插穗30 min能有效促进锦绣紫扦插生根。

关键词：木芙蓉锦绣紫扦插繁殖 IBA

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Surface Passivation Toward Efficient and Stable Perovskite Solar Cells

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Energy & Environmental Materials 2023年第1期6卷 1-24页

作者： Junmin Xia Chao liang Hao Gu Shiliang Mei shengwen li Nan Zhang Shi Chen Yongqing Cai Guichuan Xing Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoAvenida da UniversidadeTaipa China

Although metal halide perovskites are increasingly popular for the next generation of efficient photovoltaic devices,the inevitable defects from the preparation process have become the notorious barrier to further improvement of performance,which increases non-radiative recombination and lowers the power conversion efficiency of solar *** passivation strategies have been affirmed as one of the most practical approaches to suppress these ***,it is necessary to have a detailed review on the surface passivation to reveal the improvements of the ***,the mechanism and recent advances of surface passivation have been systematically summarized with respect to various passivation approaches,including the Lewis acid–base,the low-dimensional perovskite,inorganic molecules,and ***,the review also offers the research trend and prospects of surface passivation.

关键词： defects efficiency perovskite solar cells stability surface passivation