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Geometry and 3D seismic characterisation of post-rift normal faults in the Pearl River Mouth Basin,northern South China Sea

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Acta Oceanologica Sinica 2024年第4期43卷 25-39页

作者： yuanhang liu Jinwei Gao Wanli Chen Jiliang Wang Umair Khan Laboratory of Marine Geophysics and Georesources Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanya 572000China University of Chinese Academy of Sciences Beijing 100049China

Based on high-resolution 3D seismic data acquired in the Pearl(Zhujiang)River Mouth Basin of the northern South China Sea,this study investigated the geometry,spatial extension,and throw distribution of the post-rift normal fault through detailed seismic interpretation and fault modeling.A total of 289 post-rift normal faults were identified in the study area and can be classified into four types:(1)isolated normal faults above the carbonate platform;(2)isolated normal faults cutting through the carbonate platform;(3)conjugate normal faults,and(4)connecting normal *** distribution analysis on the fault planes show that the vertical throw profiles of most normal fault exhibit flat-topped *** normal faults above the carbonate platform exhibit roughly concentric ellipses with maximum throw zones in the central section whereas the normal faults cutting through the carbonate platform miss the lowermost section due to the chaotic seismic reflections in the interior of the carbonate *** vertical throws of conjugate normal faults anomalously decrease toward their intersection region on the fault plane whereas the connecting normal faults present two maximum throw zones in the central section of the fault *** to the symmetric elliptical distribution model of fault throw,an estimation was made indicating that normal faults cutting through the carbonate platform extended downward between-1308 s and-1780 s(two-way travel time)in depth and may not penetrate the entire liuhua carbonate ***,it is observed that the distribution of karst caves on the top of the carbonate platform disaccord with those of hydrocarbon reservoirs and the post-rift normal faults cutting through the carbonate platform in the study *** propose that these karst caves formed most probably by corrosive fluids derived from magmatic activities during the Dongsha event,rather than pore waters or hydrocarbons.

关键词： Post-rift normal faults fault throw Karst caves Corrosive fluids Pearl River Mouth Basin South China Sea

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Regression Method for Rail Fastener Tightness Based on Center-Line Projection Distance Feature and Neural Network

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Chinese Journal of Mechanical Engineering 2024年第2期37卷 356-371页

作者： yuanhang Wang Duxin liu Sheng Guo Yifan Wu Jing liu Wei Li Hongjie Wang Robotics Research Center School of MechanicalElectronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China China Construction Industrial&Energy Engineering Group Co. Ltd.Nanjing 210023China

In the railway system,fasteners have the functions of damping,maintaining the track distance,and adjusting the track ***,routine maintenance and inspection of fasteners are important to ensure the safe operation of track ***,assessment methods for fastener tightness include manual observation,acoustic wave detection,and image *** are limitations such as low accuracy and efficiency,easy interference and misjudgment,and a lack of accurate,stable,and fast detection *** at the small deformation characteristics and large elastic change of fasteners from full loosening to full tightening,this study proposes high-precision surface-structured light technology for fastener detection and fastener deformation feature extraction based on the center-line projection distance and a fastener tightness regression method based on neural ***,the method uses a 3D camera to obtain a fastener point cloud and then segments the elastic rod area based on the iterative closest point algorithm *** component analysis is used to calculate the normal vector of the segmented elastic rod surface and extract the point on the centerline of the elastic *** point is projected onto the upper surface of the bolt to calculate the projection ***,the mapping relationship between the projection distance sequence and fastener tightness is established,and the influence of each parameter on the fastener tightness prediction is ***,by setting up a fastener detection scene in the track experimental base,collecting data,and completing the algorithm verification,the results showed that the deviation between the fastener tightness regression value obtained after the algorithm processing and the actual measured value RMSE was 0.2196 mm,which significantly improved the effect compared with other tightness detection methods,and realized an effective fastener tightness regression.

关键词： Railway system Fasteners Tightness inspection Neural network regression 3D point cloud processing

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Regulation of interlayer channels of graphene oxide nanosheets in ultra-thin Pebax mixed-matrix membranes for CO_(2) capture

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Chinese Journal of Chemical Engineering 2024年第3期67卷 257-267页

作者： Feifan Yang yuanhang Jin Jiangying liu Haipeng Zhu Rong Xu Fenjuan Xiangli Gongping liu Wanqin Jin State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology School of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China Shandong Production and Research Long Membrane Technology Development Co. Ltd.Yantai Economic Development ZoneYantai 265505China

For the application of carbon capture by membrane process,it is crucial to develop a highly permeable CO_(2)-selective *** this work,we reported an ultra-thin polyether-block-amide(Pebax)mixedmatrix membranes(MMMs)incorporated by graphene oxide(GO),in which the interlayer channels were regulated to optimize the CO_(2)/N_(2) separation *** membrane preparation conditions were systematically investigated on the influence of the membrane structure and separation performance,including the lateral size of GO nanosheets,GO loading,thermal reduction temperature,and *** results demonstrated that the precisely regulated interlayer channel of GO nanosheets can rapidly provide CO_(2)-selective transport channels due to the synergetic effects of size sieving and preferential *** GO/Pebax ultra-thin MMMs exhibited CO_(2)/N_(2) selectivity of 72 and CO_(2) permeance of 400 GPU(1 GPU=106 cm^(3)(STP)·cm^(2)·s^(-1)·cmHg^(-1)),providing a promising candidate for CO_(2) capture.

关键词： Mixed-matrix membrane Ultra-thin membrane Pebax Graphene oxide CO_(2) capture

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Analysis of China’s PM_(2.5)and ozone coordinated control strategy based on the observation data from 2015 to 2020

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Journal of Environmental Sciences 2024年第4期138卷 385-394页

作者： liuwei Kong Mengdi Song Xin Li Ying liu Sihua Lu Limin Zeng yuanhang Zhang State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China

The coordinated control of PM_(2.5)and ozone has become the strategic goal of national air pollution *** the gradual decline in PM_(2.5)concentration and the aggravation of ozone pollution,a better understanding of the coordinated control of PM_(2.5)and ozone is urgently ***,we collected and sorted air pollutant data for 337 cities from 2015 to 2020 to explore the characteristics of PM_(2.5)and ozone pollution based on China’s five major air pollution *** results show that it is necessary to continue to strengthen the emission reduction in PM_(2.5)and ozone precursors,and control NO_(x) and VOCs while promoting a dramatic emission reduction in PM_(2.5).The primary method of curbing ozone pollution is to strengthen the emission control of VOCs,with a long-term strategy of achieving substantial emission reductions in NO_(x),because VOCs and NO_(x) are also precursors to PM_(2.5);hence,their reductions also contribute to the reduction in PM_(2.5).Therefore,the implementation of a multipollutant emission reduction control strategy aimed at the prevention and control of PM_(2.5)and ozone pollution is the only means to realize the coordinated control of PM_(2.5)and ozone.

关键词： PM_(2.5) Ozone Coordinated control Multipollutant reduction

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基于数据挖掘对中医药治疗CKD合并脑卒中的组方用药分析

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北京联合大学学报 2024年第4期38卷 71-76页

作者：祝昌昊郭杏林杨精华刘远航王耀光唐阁天津中医药大学第一附属医院、国家中医针灸临床医学研究中心天津300381 安阳市中医院河南安阳455000

基于数据挖掘方法探讨中医药治疗慢性肾脏病(CKD)合并脑卒中(CS)的临床用药规律。收集2017年10月至2022年10月天津中医药大学第一附属医院门诊治疗CKD合并CS的处方,建立中药处方数据库。统计分析用药频次、性味及归经,对处方中的药物进... 详细信息

基于数据挖掘方法探讨中医药治疗慢性肾脏病(CKD)合并脑卒中(CS)的临床用药规律。收集2017年10月至2022年10月天津中医药大学第一附属医院门诊治疗CKD合并CS的处方,建立中药处方数据库。统计分析用药频次、性味及归经,对处方中的药物进行聚类分析,利用SPSS Modeler 18 Apriori算法对所有药物进行关联分析。最终纳入544个处方,涉及中药258味,总用药频次8 886次。药性以寒性、温性、平性居多;药味以苦味、甘味、辛味为主;归经多为脾经、肝经;得出13个关联组合药对和5个核心药物组合。中医药对CKD合并CS患者的治疗,根据气虚血瘀、脾肾两虚的病机特点,主要采用健脾益气、补肾活血的组方用药。

关键词：慢性肾脏病脑卒中数据挖掘药物组合脑肾同治

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光学相干断层成像在急性心肌梗死冠状动脉分层斑块病变中的应用

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中华诊断学电子杂志 2024年第2期12卷 73-79页

作者：郭方明赵明俐颜凡辉刘萌萌王阳赵英杰刘远航张艳芬詹景冬吉林市中心医院心内科 132011

目的:探讨光学相干断层成像(OCT)在急性心肌梗死(AMI)冠状动脉分层斑块病变中的应用价值。方法:选择自2019年1月至2022年10月在吉林市中心医院心血管内科行冠脉造影(CAG),且造影后对靶血管行OCT检查并确诊斑块侵蚀导致的60例AMI患者,根... 详细信息

目的:探讨光学相干断层成像(OCT)在急性心肌梗死(AMI)冠状动脉分层斑块病变中的应用价值。方法:选择自2019年1月至2022年10月在吉林市中心医院心血管内科行冠脉造影(CAG),且造影后对靶血管行OCT检查并确诊斑块侵蚀导致的60例AMI患者,根据罪犯病变是否存在分层,将患者分为分层斑块发生侵蚀组(n=28)和非分层斑块发生侵蚀组(n=32)。比较患者的一般资料、既往病史、心血管用药史、临床生化指标、CAG和OCT特征。结果:60例斑块侵蚀引起的AMI患者中,分层斑块发生侵蚀28例,占46.67%。分层斑块发生侵蚀组低密度脂蛋白胆固醇水平[(3.38±0.27)mmol/L]和糖化血红蛋白水平[(7.38±0.24)%]明显高于非分层斑块侵蚀患者[(2.42±0.15)mmol/L,(6.00±0.58)%],均差异有统计学意义(t=6.00,3.23;均P<0.05)。CAG示,与非分层斑块发生侵蚀组相比,分层斑块发生侵蚀组罪犯血管更多见于冠脉左前降支[18/28(64.29%),12/32(37.50%)]、病变长度更长[(28.64±4.38)mm,(15.23±4.32)mm]、病变更复杂(B2/C型)[16/28(57.14%),8/32(25.00%)](χ2=4.29,t=11.92,χ2=6.43;均P<0.05)。OCT示,与非分层斑块发生侵蚀组相比,分层斑块发生侵蚀组纤维帽更薄[(91.78±7.89)μm,(120.89±7.18)μm]、脂质斑块弧度更大[(270.21±59.89)°,(206.58±58.61)°]、最小管腔面积更小[(1.25±0.21)mm2,(1.77±0.24)mm2]、面积狭窄率更高[(88.38±9.56)%,(76.45±8.38)%](t=14.96,2.48,8.87,2.56;均P<0.05)。分层斑块发生侵蚀组薄纤维帽斑块[20/28(71.43%),14/32(43.75%)]、胆固醇结晶[15/28(53.57%),8/32(25.00%)]、巨噬细胞浸润[19/28(67.86%),12/32(37.50%)]、滋养血管[8/28(28.57%),2/32(6.25%)]、血栓负荷[25/28(89.29%),21/32(65.63%)]比例均较非分层斑块发生侵蚀组更多,均差异有统计学意义(χ2=4.66,5.16,5.51,3.87,4.67;均P<0.05)。与非分层斑块发生侵蚀组相比,分层斑块发生侵蚀组植入支架长度更长[(30.00±5.64)mm,(18.00±7.42)mm]、更多的支架膨胀不全[14/28(50.00%),8/32(25.00%)]、更多的支架贴壁不良[12/28(42.86%),6/32(18.75%)]、植入支架后需要更大的球囊后扩张[22/28(78.57%),10/32(31.25%)]、支架植入后更高的后扩张压力[(18.00±2.68)atm,(14.00±2.46)atm](1 atm=101.3 kPa)(t=9.32,χ2=4.02,3.87,4.25,t=2.47;均P<0.05)。两组患者术后12个月累计发生的主要不良心血管事件(MACE)为靶血管血运重建,分别为1例和2例,分层斑块发生侵蚀组靶血管血运重建率(2/28,7.14%)高于非分层斑块发生侵蚀组(1/32,3.13%),但差异无统计学意义(P=0.594)。结论:分层斑块侵蚀与病变特征及患者临床表现密切相关,OCT在评估分层斑块侵蚀AMI患者PCI治疗效果方面具有潜在的应用前景,可提供个体化治疗指导。

关键词：心肌梗死经皮冠状动脉介入治疗体层摄影术光学相干分层斑块支架贴壁不良

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科学知识经济学研究评述

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经济学动态 2019年第4期 125-140页

作者：刘远航中国社会科学院研究生院

科学知识经济学被定义为运用经济学的概念和方法考察“科学知识的认识论本质和价值”。按照科学知识经济学的观点,科学知识的形成是一个社会的过程:一方面,科学家是具有自身利益的个体,在既定目标的驱使下从事研究活动;另一方面,科学研... 详细信息

科学知识经济学被定义为运用经济学的概念和方法考察“科学知识的认识论本质和价值”。按照科学知识经济学的观点,科学知识的形成是一个社会的过程:一方面,科学家是具有自身利益的个体,在既定目标的驱使下从事研究活动;另一方面,科学研究是在特定的社会组织内开展的,各种科学组织规则发挥着调控科学家个人行为的作用。因此,科学知识可以被视作科学家个人利益和有关社会规则之间互动的产物。这两点分别与经济学中的理性人假设和“无形之手”假说相暗合,这就为经济学方法介入科学和认识论问题的分析提供了前提条件。近年来出现的诸多科学知识经济学相关研究,不外乎基于对科学家利益与科学规则的互动模式的理解。一批学者的学说中包含了科学规则外生给定的论断,而另一些学者则主张规则是通过科学家的行为内生地决定的。本文拟从这一角度出发,将可归入科学知识经济学门类的各种主要观点分门别类进行考察。

关键词：科学知识科学知识经济学科学知识社会学

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基于“互联网+”创新创业大赛的护理学专业创新创业课程改革探索

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卫生职业教育 2024年第5期42卷 61-64页

作者：蒋慧玥刘媛航罗荣宁广西医科大学广西南宁530021

将高校创新创业教育与专业教育课程进行融合,是对护理学“互联网+”背景下创新创业课程改革发展进行的积极探索。通过对护理学专业创新创业课程教学现存的问题与不足进行总结及探索,发现存在思想政治教育、专业课程教育与创新创业教育... 详细信息

将高校创新创业教育与专业教育课程进行融合,是对护理学“互联网+”背景下创新创业课程改革发展进行的积极探索。通过对护理学专业创新创业课程教学现存的问题与不足进行总结及探索,发现存在思想政治教育、专业课程教育与创新创业教育融合不足,学生创新创业意识不强,师资力量较薄弱及实践平台功能单一等问题。开展该课程改革的意义在于,提高学生创新思维能力、教师专业水平及思政课堂融入度,促进高校创新创业教育发展。

关键词：互联网+ 创新创业大赛护理学专业

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Recent advances,challenges,and perspectives on carbon capture

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Frontiers of Environmental Science & Engineering 2024年第6期18卷 75-104页

作者： Shihan Zhang Yao Shen Chenghang Zheng Qianqian Xu Yifang Sun Min Huang Lu Li Xiongwei Yang Hao Zhou Heliang Ma Zhendong Li yuanhang Zhang Wenqing liu Xiang Gao Institute of Energy and Sustainable Development Zhejiang University of TechnologyHangzhou 310014China College of Environment Zhejiang University of TechnologyHangzhou 310014China Baima Lake Laboratory Hangzhou 310051China Institute of Carbon Neutrality College of Energy EngineeringZhejiang UniversityHangzhou 310027China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsHFIPSChinese Academy of SciencesHefei 230031China

Carbon capture,utilization and storage(CCUS)technologies play an essential role in achieving Net Zero Emissions *** the lack of timely reviews on the recent advancements in promising CCUS technologies,it is crucial to provide a prompt review of the CCUS advances to understand the current research gaps pertained to its industrial *** that end,this review first summarized the developmental history of CCUS technologies and the current large-scale ***,based on a visually bibliometric analysis,the carbon capture remains a hotspot in the CCUS *** that the materials applied in the carbon capture process determines its *** a result,the state-of-the-art carbon capture materials and emerging capture technologies were comprehensively summarized and *** between state-of-art carbon capture process and its ideal counterpart are analyzed,and insights into the research needs such as material design,process optimization,environmental impact,and technical and economic assessments are provided.

关键词： Carbon capture,utilization and storage Visualization analysis Research hotspots and trends CO_(2)capture technology

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21世纪体育院系人才培养体系的研究

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体育文化导刊 2005年第12期 54-55页

作者：刘远航湘南学院

体育院系人才培养方向关系到未来我国体育事业发展的前途与命运。在我国目前现行的体育院系人才培养的条件下,如何改变现行的人才培养体系,培养具有高素质、高质量的各类体育人才,以适应21世纪社会及体育事业的发展需要,是我国高等院校... 详细信息

体育院系人才培养方向关系到未来我国体育事业发展的前途与命运。在我国目前现行的体育院系人才培养的条件下,如何改变现行的人才培养体系,培养具有高素质、高质量的各类体育人才,以适应21世纪社会及体育事业的发展需要,是我国高等院校必须解决的主要问题。文章通过对体育院系人才培养体系的研究,旨为未来我国体育院系人才培养与发展方向提供理论参考。

关键词： 21世纪体育院系人才体系

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