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Visualization and early warning analysis of damage degree of surrounding rock mass in underground powerhouse

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International Journal of Mining Science and Technology 2023年第6期33卷 717-731页

作者： Yuepeng Sun Haijian Su peiwei xiao Peng Li Biao Li Xiang Zhou Kaiqi Bian Nuwen Xu State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan UniversityChengdu 610065China State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China Dadu River Hydropower Development Company LTDChengdu 610016China School of Geoscience and Technology Southwest Petroleum UniversityChengdu 610500China

Based on the underground powerhouse of Shuangjiangkou hydropower station,Octree theory is adopted to define the indices of the microseismic(MS)spatial aggregation degree and the deviation values of MS count and energy.The relationship between the MS multiple parameters and surrounding rock mass instability is established from three aspects:time,space,and strength.Supplemented by the center frequency of the signal evolution characteristics,A fuzzy comprehensive evaluation model and the evolution trend of the MS event center frequency are constructed to quantitatively describe the early warning state of the surrounding rock mass instability.The results show that the multilevel tree structure and voxels generated based on the Octree theory fit relatively well with the set of MS points in threedimensional space.The fuzzy comprehensive evaluation model based on MS spatial aggregation and MS count and energy deviation values enables three-dimensional visualization of the potential damage area and damage extent of the surrounding rock mass.The warning time and potential damage zone quantified are highly consistent with the characteristics of MS precursors,with wide recognition and field investigation results,which fully validate the rationality and applicability of the proposed method.These findings can provide references for the early warning of surrounding rock mass instability in similar underground engineering.

关键词： Underground powerhouse MS monitoring Early warning Visualization

Analysis of rockburst mechanism and warning based on microseismic moment tensors and dynamic Bayesian networks

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第10期15卷 2521-2538页

作者： Haoyu Mao Nuwen Xu Xiang Li Biao Li peiwei xiao Yonghong Li Peng Li State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065China School of Geoscience and Technology Southwest Petroleum UniversityChengdu610500China PowerChina Chengdu Engineering Corporation Limited Chengdu610072China Sichuan Dadu River Shuangjiangkou Hydropower Development Corporation Limited Maerkang624011China

One of the major factors inhibiting the construction of deep underground projects is the risk posed by rockbursts.A study was conducted on the access tunnel of the Shuangjiangkou hydropower station to determine the evolutionary mechanism of microfractures within the surrounding rock mass during rockburst development and develop a rockburst warning model.The study area was chosen through the combination of field studies with an analysis of the spatial and temporal distribution of microseismic(MS)events.The moment tensor inversion method was adopted to study rockburst mechanism,and a dynamic Bayesian network(DBN)was applied to investigating the sensitivity of MS source parameters for rockburst warnings.A MS multivariable rockburst warning model was proposed and validated using two case studies.The results indicate that fractures in the surrounding rock mass during the development of strain-structure rockbursts initially show shear failure and are then followed by tensile failure.The effectiveness of the DBN-based rockburst warning model was demonstrated using self-validation and K-fold cross-validation.Moment magnitude and source radius are the most sensitive factors based on an investigation of the influence on the parent and child nodes in the model,which can serve as important standards for rockburst warnings.The proposed rockburst warning model was found to be effective when applied to two actual projects.

关键词： Microseismic monitoring Moment tensor Dynamic Bayesian network(DBN) Rockburst warning Shuangjiangkou hydropower station

Microseismic monitoring and forecasting of dynamic disasters in underground hydropower projects in southwest China:A review

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第8期15卷 2158-2177页

作者： Biao Li Nuwen Xu peiwei xiao Yong Xia Xiang Zhou Gongkai Gu Xingguo Yang School of Geoscience and Technology Southwest Petroleum UniversityChengdu610500China State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065China Power China Chengdu Engineering Co. LtdChengdu610072China Chn Energy Dadu River Hydropower Development Co. LtdChengdu610041China China Three Gorges Construction Engineering Corporation Chengdu610095China

The underground hydropower projects in Southwest China is characterized by large excavation sizes,high geostresses,complicated geological conditions and multiple construction processes.Various disasters such as collapses,large deformations,rockbursts are frequently encountered,resulting in serious casualties and huge economic losses.This review mainly presents some representative results on microseismic(MS)monitoring and forecasting for disasters in hydropower underground engineering.First,a set of new denoising,spectral analysis,and location methods were developed for better identification and location of MS signals.Then,the tempo-spatial characteristics of MS events were analyzed to understand the relationship between field construction and damages of surrounding rocks.Combined with field construction,geological data,numerical simulation and parametric analysis of MS sources,the focal mechanism of MS events was revealed.A damage constitutive model considering MS fracturing size was put forward and feedback analysis considering the MS damage of underground surrounding rocks was conducted.Next,an MS multi-parameter based risk assessment and early warning method for dynamic disasters were proposed.The technology for control of the damage and deformation of underground surrounding rocks was proposed for underground caverns.Finally,two typical underground powerhouses were selected as case studies.These achievements can provide significant references for prevention and control of dynamic disasters for underground engineering with similar complicated geological conditions.

关键词： MS monitoring Forecasting method Control technology Dynamic disaster Underground engineering

从建立社会主义市场经济体制到构建高水平社会主义市场经济体制

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政治经济学评论 2024年第2期15卷 3-24页

作者：任保平李培伟南京大学数字经济与管理学院西北大学经济管理学院

社会主义市场经济经过30年的发展,需要从建立社会主义市场经济向构建高水平社会主义市场经济体制转变。理解如何构建高水平社会主义市场经济体制,需要回顾总结30年以来社会主义市场经济从建立到完善的历史进程。中国社会主义市场经济30... 详细信息

社会主义市场经济经过30年的发展,需要从建立社会主义市场经济向构建高水平社会主义市场经济体制转变。理解如何构建高水平社会主义市场经济体制,需要回顾总结30年以来社会主义市场经济从建立到完善的历史进程。中国社会主义市场经济30年政策演进的表层演进轨迹是市场与政府关系的演变,深层演进轨迹是公有制经济与市场经济结合的演变,本质上是一个通过不断完善市场体系建设以走向全国统一大市场并与外部市场有机衔接的市场现代化过程。实践创新涵盖国有企业混合所有制改革、民营经济多元化发展、对外开放深化、市场体系建设以及政府规制改革。理论创新体现在积极发挥社会主义基本制度的制度优势、国有企业市场化改革的主导优势、“一种资源、一个市场”的功能优势以及“有效市场”与“有为政府”的协调优势上。从建立社会主义市场经济向构建高水平社会主义市场经济体制转变的关键在于建立并完善市场经济的运行体系,路径重点是完善社会主义制度与社会主义市场经济体制的结合、建设高标准市场体系以推动全国统一大市场的形成、推进高标准市场体系与高水平对外开放的有机衔接、实现数字经济与社会主义市场经济的融合发展、深化体制机制改革以赋能市场与政府的功能协调性以及以法治维护和保障构建高水平社会主义市场经济体制。

关键词：高水平社会主义市场经济体制政策演进实践创新理论创新

The genomic and immunogenomic landscape of mechanics pathway informs clinical prognosis and response to mechanotherapy

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Science China Life Sciences 2024年第8期 1549-1562页

作者： Peidong Zhang peiwei Li Muya Tang Ryan C.Gimple Liang Huang Jing Yue Qiuhong Shen Yiwei Du Qian Zhang Zhengnan Yang Haihuai He Kailin Yang Linjie Zhao Shengtao Zhou Department of Obstetrics and Gynecology Key Laboratory of Birth Defects and Related Diseases of Women and Children of MOEState Key Laboratory of BiotherapyWest China Second HospitalSichuan University and Collaborative Innovation Center Physician Scientist Training Program Department of MedicineWashington University School of Medicine Department of Neurosurgery State Key Laboratory of BiotherapyWest China HospitalSichuan University and Collaborative Innovation Center Department of Radiation Oncology Taussig Cancer CenterCleveland Clinic

Mechanics shape cell and tissue plasticity and maintain their homeostasis.In cancers,mechanical signals regulate cancer hallmarks via mechanotransduction pathways,such as proliferation,metastasis and metabolic reprogramming.However,comprehensive characterization of mechanotransduction pathway genes and their clinical relevance across different cancer types remains untouched.Herein,we systematically portrayed the alterations of mechanotransduction pathway genes across 31 cancer types using The Cancer Genome Atlas(TCGA)databases.All the cancer types could be categorized into 6 subtypes based upon the transcriptional pattern of mechanics pathway genes.Each subtype has its own unique molecular expression pattern,mutation landscapes,immune infiltrates,and patient clinical outcome.We further found that the responses of two subtypes of cancers,one with the optimal outcome and the other with the worst prognosis,to a classical mechanotherapeutic agent(Fasudil,Rho A/ROCK inhibitor) were totally different,indicating that our cancer stratification system based upon mechanotransduction pathway genes could inform clinical responses of patients to mechanotherapeutic agents.Collectively,our study provides a novel pan-cancer landscape of the mechanotransduction pathways and underscores its potential clinical significance in the prediction of clinical prognosis and therapeutic responses to mechanotherapy among cancer patients.

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光电催化矿物材料的制备及应用研究进展

材料工程 2024年第4期52卷 61-72页

作者：胡佩伟张炎高润琴程港莉张占兵胡超武汉科技大学资源与环境工程学院武汉430081 冶金矿产资源高效利用与造块湖北省重点实验室武汉430081 中核南方新材料有限公司江西赣州341000 苏州中材非金属矿工业设计研究院有限公司江苏苏州215151

光电催化技术是解决环境污染和能源短缺问题最具应用前景的方法之一。基于半导体矿物的光电化学性质或非半导体矿物的天然物理特性,将矿物与光电催化功能体复合构建的光电催化矿物材料具有成本低、环境相容性好、性能优异等特点,其在矿... 详细信息

光电催化技术是解决环境污染和能源短缺问题最具应用前景的方法之一。基于半导体矿物的光电化学性质或非半导体矿物的天然物理特性,将矿物与光电催化功能体复合构建的光电催化矿物材料具有成本低、环境相容性好、性能优异等特点,其在矿物利用的新兴领域受到了广泛关注。本文在限定了光电催化矿物材料研究是否属于矿物应用范畴的基础上,介绍了光电催化矿物材料包含的矿物组分及特征,提出了光电催化矿物材料的分类,并对光电催化矿物材料的制备方法及矿物增强光电催化活性的机制进行了讨论。最后,概述了光电催化矿物材料用于水中污染物治理、光电催化水分解产氢、CO_(2)能源化等领域的研究现状;指出应重点关注矿物本征光电属性、有效建立材料复合结构与效能的联系、明确材料矿物学属性影响光电催化的机制等问题,拓展光电催化矿物材料在新能源、化学品合成和矿物/微生物作用等领域的应用研究。

关键词：光电催化矿物材料矿物组分水处理水分解制氢 CO_(2)能源化

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中国机场业全要素生产率的时空特征

综合运输 2024年第5期46卷 17-22,38页

作者：殷培伟西安航空学院经济管理学院陕西西安710077

机场业作为资本密集型的公共基础设施行业,具有显著的公益性和经济效应,探讨其发展效率对交通强国建设至关重要。基于2004-2019年除西藏外中国内地地区30个省份面板数据,采用SBM-Malmquist指数模型和Dagum基尼系数,考察机场业全要素生... 详细信息

机场业作为资本密集型的公共基础设施行业,具有显著的公益性和经济效应,探讨其发展效率对交通强国建设至关重要。基于2004-2019年除西藏外中国内地地区30个省份面板数据,采用SBM-Malmquist指数模型和Dagum基尼系数,考察机场业全要素生产率的时空特征。研究发现:16年间中国机场业全要素生产率保持上行趋势,但整体水平较低且具有明显的省际和区域非均衡性;中国各省份机场业全要素生产率总的区域差异呈升降交替出现的M型走势,区域内差异东部最大,区域间差异主要表现在东部与中西部之间,区域间差异是区域差异的主要来源。

关键词：机场业全要素生产率 SBM-Malmquist指数模型

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面向移动健康的医院信息系统设计与开发

无线互联科技 2024年第4期21卷 102-104页

作者：魏培威郓城县第四人民医院山东菏泽274700

移动健康作为一种新兴的医疗模式,正在快速发展。随着移动设备的普及和移动网络的快速发展,越来越多的人开始使用移动应用来管理自己的健康,但目前大部分移动健康应用缺乏与医院信息系统的有效结合,导致信息的不完整和不准确,在一定程... 详细信息

移动健康作为一种新兴的医疗模式,正在快速发展。随着移动设备的普及和移动网络的快速发展,越来越多的人开始使用移动应用来管理自己的健康,但目前大部分移动健康应用缺乏与医院信息系统的有效结合,导致信息的不完整和不准确,在一定程度上限制了医院信息系统的发展。因此,设计和开发一个面向移动健康的医院信息系统具有重要意义。文章介绍了面向移动健康的医院信息系统的设计与开发研究,旨在为相关从业人员提供参考。

关键词：移动健康医院信息系统设计与开发

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基于项目式学习的高中信息技术课程教学研究

成才之路 2024年第16期 101-104页

作者：姚培伟贵州省遵义市第十三中学贵州遵义563000

项目式学习是一种以学生为中心的教学方法,它通过设计和执行项目来促进学生的学习。在高中信息技术课程教学中,项目式学习可以帮助学生将理论知识与实际操作相结合。通过实际操作,学生可以更好地理解信息技术的原理和应用,提高学习效果... 详细信息

项目式学习是一种以学生为中心的教学方法,它通过设计和执行项目来促进学生的学习。在高中信息技术课程教学中,项目式学习可以帮助学生将理论知识与实际操作相结合。通过实际操作,学生可以更好地理解信息技术的原理和应用,提高学习效果。文章简述项目式学习的内涵及其理论基础,强调高中信息技术课程的特点,探讨基于项目式学习的高中信息技术教学策略,旨在为一线教师优化高中信息技术教学提供参考。

关键词：高中项目式学习信息技术课程特点教学策略教学效果

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