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城市群跨城通勤交通方式选择影响因素研究

交通工程 2024年第1期24卷 23-31页

作者：赖见辉吴小洁黄利华王春松王妍妍北京工业大学城市建设学部北京100124 首都经济贸易大学管理工程学院北京100070 北京城建交通设计研究院有限公司北京100050

针对跨城通勤出行特征与生成机理不明,无法有效配置交通资源问题.利用贝叶斯网络模型,从个人因素、家庭因素和通勤因素3方面,分析其对周通勤模式、交通方式、出发时间选择的影响.结果表明:①年龄、职业、收入水平对周通勤模式选择有较... 详细信息

针对跨城通勤出行特征与生成机理不明,无法有效配置交通资源问题.利用贝叶斯网络模型,从个人因素、家庭因素和通勤因素3方面,分析其对周通勤模式、交通方式、出发时间选择的影响.结果表明:①年龄、职业、收入水平对周通勤模式选择有较大影响,而性别和学历几乎没有影响;家庭中有孩子的城际通勤者选择周通勤的概率均减少;家庭有小汽车会促进日通勤,抑制周通勤;通勤距离越大,选择周通勤的概率越大;②职业、收入水平对周通勤交通方式选择有较大影响;公司职工更倾向于选择公共交通方式;服务类人员和公司职工在周日平峰时可能更倾向于选择火车或高铁,与周通勤者的选择相反;通勤距离对周通勤者出发时间选择具有较高敏感性.

关键词：交通工程城际通勤周通勤贝叶斯网络

Genesis Types and Diagenesis Compaction Mechanisms of Sandstone Rreservoirs in Dynamic Environments in Oil/Gas Basins in China

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Petroleum Science 2006年第3期3卷 23-31页

作者： Shou Jianfeng Si chunsong wang Xin Hangzhou Institute of Petroleum Geology CNPC Hangzhou Zhejiang 310023 China

The diversity of sandstone diagenesis mechanisms caused by the complex geological conditions of oil/gas basins in China could hardly be reasonably explained by the traditional concept of burial diagenesis. Three genesis types of thermal diagenesis, tectonic diagenesis and fluid diagenesis are presented on the basis of the dynamic environment of the oil/gas basins *** controlling factors and mechanisms of sandstone diagenesis. Thermal diagenesis of sandstone reservoirs is related not only to the effect of formation temperature on diagenesis, but also to the significant changes in diagenesis caused by geothermal gradients. The concept of thermal compaction is presented. Thermal compaction becomes weaker with increasing depth and becomes stronger at a higher geothermal gradient. At the same formation temperature, the sandstone porosity in the region with a lower geothermal gradient is e^0.077＋0.0042T times higher than that in the region with a higher geothermal gradient. Both sudden and gradual changes are observed in diagenetic evolution caused by structural deformation. Average sandstone compaction increased by 0.1051% for every 1.0MPa increase of lateral tectonic compressional stress, while late tectonic napping helped to preserve a higher porosity of underlying sandstone reservoir. Fluid diagenesis is a general phenomenon. The compaction caused by fluid properties is significant. The coarser the grain size, the stronger the fluid effect on compaction. The greater the burial depth, the weaker the fluid effect on compaction for the specific reservoir lithology and the greater the difference in the fluid effects on compaction between different grain sizes.

关键词： Oil/gas basins in China sandstone reservoir genesis types diagenesis compaction mechanism

The Probability Density Function Related to Shallow Cumulus Entrainment Rate and Its Influencing Factors in a Large-Eddy Simulation

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Advances in Atmospheric Sciences 2024年第1期41卷 173-187页

作者： Lei ZHU chunsong LU Xiaoqi XU Xin HE Junjun LI Shi LUO Yuan wang Fan wang Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)and Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration Nanjing University of Information Science and TechnologyNanjing 210044China Nanjing Joint Institute for Atmospheric Sciences Nanjing 210019China College of Aviation Meteorology Civil Aviation Flight University of ChinaGuanghan 618307China Collaborative Innovation Center for Western Ecological Safety Lanzhou UniversityLanzhou 730000China Department of Geography Hong Kong Baptist UniversityHong Kong SAR 999077China

The process of entrainment-mixing between cumulus clouds and the ambient air is important for the development of cumulus *** obtaining the entrainment rate(λ)is particularly important for its parameterization within the overall cumulus parameterization *** this study,an improved bulk-plume method is proposed by solving the equations of two conserved variables simultaneously to calculateλof cumulus clouds in a large-eddy *** results demonstrate that the improved bulk-plume method is more reliable than the traditional bulk-plume method,becauseλ,as calculated from the improved method,falls within the range ofλvalues obtained from the traditional method using different conserved *** probability density functions ofλfor all data,different times,and different heights can be well-fitted by a log-normal distribution,which supports the assumed stochastic entrainment process in previous *** analysis demonstrate that the relationship betweenλand the vertical velocity is better than other thermodynamic/dynamical properties;thus,the vertical velocity is recommended as the primary influencing factor for the parameterization ofλin the *** results of this study enhance the theoretical understanding ofλand its influencing factors and shed new light on the development ofλparameterization.

关键词： large-eddy simulation cumulus clouds entrainment rate probability density functions spatial and temporal distribution

Improvement of cloud microphysical parameterization and its advantages in simulating precipitation along the Sichuan-Xizang Railway

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Science China Earth Sciences 2024年第3期67卷 856-873页

作者： Xiaoqi XU Zhiwei HENG Yueqing LI Shunjiu wang Jian LI Yuan wang Jinghua CHEN Peiwen ZHANG chunsong LU China Meteorological Administration Transportation Meteorology Key Laboratory Nanjing Joint Institute for Atmospheric SciencesNanjing 210041China Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province Institute of Plateau MeteorologyCMAChengdu 610072China State Key Laboratory of Disaster Weather Chinese Academy of Meteorological SciencesBeijing 100081China Collaborative Innovation Center for Western Ecological Safety Lanzhou UniversityLanzhou 730000China China Meteorological Administration Aerosol-Cloud and Precipitation Key Laboratory and Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD) Nanjing University of Information Science and TechnologyNanjing 210044China

The Sichuan-Xizang Railway is an important part of the railway network in China, and geological disasters, such as mountain floods and landslides, frequently occur in this region. Precipitation is an important cause of these disasters;therefore,accurate simulation of the precipitation in this region is highly important. In this study, the descriptions for uncertain processes in the cloud microphysics scheme are improved;these processes include cloud droplet activation, cloud-rain autoconversion, rain accretion by cloud droplets, and the entrainment-mixing process. In the default scheme, the cloud water content of different sizes corresponds to the same cloud droplet concentration, which is inconsistent with the actual content;this results in excessive cloud droplet size, unreasonable related conversion rates of microphysical process(such as cloud-rain autoconversion), and an overestimation of precipitation. Our new scheme overcomes the problem of excessive cloud droplet size. The processes of cloudrain autoconversion and rain accretion by cloud droplets are similar to the stochastic collection equation, and the mixing mechanism of cloud droplets is more consistent with that occurred during the actual physical process in the cloud. Based on the new and old schemes, multiple precipitation processes in the flood season of 2021 along the Sichuan-Xizang Railway are simulated, and the results are evaluated using ground observations and satellite data. Compared to the default scheme, the new scheme is more suitable for the simulation of cloud physics, reducing the simulation deviation of the liquid water path and droplet radius from 2 times to less than 1 time and significantly alleviating the overestimation of precipitation intensity and range of precipitation center. The average root-mean-square error is reduced by 22%. Our results can provide a scientific reference for improving precipitation forecasting and disaster prevention in this region.

关键词： The Sichuan-Xizang Railway Cloud microphysics Precipitation Model improvement

The Influence of Airflow Transport Pathways on Precipitation during the Rainy Season in the Liupan Mountains of Northwest China

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Advances in Atmospheric Sciences 2024年第11期41卷 2215-2229页

作者： Yujun QIU chunsong LU Zhiliang SHU Peiyun DENG Key Laboratory of Aerosol-Cloud-Precipitation of China Meteorological Administration Nanjing University of Information Science&TechnologyNanjing 210044China Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions China Meteorological AdministrationYinchuan 750002China Ningxia Key Laboratory of Meteorological Disaster Prevention and Reduction Yinchuan 750002China

This study investigates the influence of airflow transport pathways on seasonal rainfall in the mountainous region of the Liupan Mountains(LM) during the rainy seasons from 2020 to 2022, utilizing observational data from seven ground gradient stations located on the eastern slopes, western slopes, and mountaintops combined with backward trajectory cluster analysis. The results indicate 1) that the LM's rainy season, characterized by overcast and rainy days, is mainly influenced by cold and moist airflows(CMAs) from the westerly direction and warm and moist airflows(WMAs) from a slightly southern direction. The precipitation amounts under four airflow transport paths are ranked from largest to smallest as follows: WMAs, CMAs, warm dry airflows(WDAs), and cold dry airflows(CDAs). 2) WMAs contribute significantly more to the intensity of regional precipitation than the other three types of airflows. During localized precipitation events,warm airflows have higher precipitation intensities at night than cold airflows, while the opposite is true during the afternoon. 3) During regional precipitation events, water vapor content is the primary influencing factor. Precipitation characteristics under humid airflows are mainly affected by high water vapor content, whereas during dry airflow precipitation, dynamic and thermodynamic factors have a more pronounced impact. 4) During localized precipitation events, the influence of dynamic and thermodynamic factors is more complex than during regional precipitation, with the precipitation characteristics of the four airflows closely related to their water vapor content, air temperature and humidity attributes, and orographic lifting. 5) Compared to regional precipitation, the influence of topography is more prominent in localized precipitation processes.

关键词： regional precipitation localized precipitation airflow transport water vapor flux instability energy topographic influence

Research and Application of the Space Digital Model about the Surface of the Complex Parts

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Research and Application of the Space Digital Model about th...

主动铰接盾构在连续小半径曲线中风化泥岩的掘进控制技术

第四届国际机械工程与力学会议

作者： Xiaohua HUANG Juan CAO Jiancheng XU chunsong wang Jinsong YIN The institute of the mechanical engineering Nanjing University of science and technology The Engineering Training Center Nanjing University of science and technology The institute of Taizhou Nanjing University of science and technology

In the process of the CNC profiling, there exists some problem, such as processing interference, undercutting and the profiled processing precision. These problems are seriously affected the technology of Profiling used in the surface processing of the complex components. It is very necessary to research the digital model of the surface of the complex parts. On the basis of the data acquisition of profiling and the vector characteristics, the normal vector and tangential vector of the differential points on the surface of parts are got, and we get the space digital model of the surface of those parts. At last, we do some processing experiment using the method, and all those above question are resolved successfully.

关键词： Profiling process Vector Geometry Complex Surface Digital Model

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隧道建设 2017年第A1期37卷 189-193页

作者：杨圆王春松中国水利水电第十四工程局有限公司云南昆明650041

武汉市轨道交通11号线东段工程光谷四路站—光谷五路站区间为"S"型连续曲线,最小平曲线半径为350 m,采用盾构法施工。通过对主动铰接盾构机掘进控制的难点分析,从土压力、千斤顶推力、千斤顶行程差、水平铰接角度和前盾水平趋向等方面... 详细信息

武汉市轨道交通11号线东段工程光谷四路站—光谷五路站区间为"S"型连续曲线,最小平曲线半径为350 m,采用盾构法施工。通过对主动铰接盾构机掘进控制的难点分析,从土压力、千斤顶推力、千斤顶行程差、水平铰接角度和前盾水平趋向等方面采取有针对性的技术控制措施,使成型隧道轴线、管片错台控制在规范允许范围之内,成功解决了连续小半径曲线隧道盾构施工轴线难以控制、管片容易错台等大问题。

关键词：主动铰接盾构连续曲线小半径中风化泥岩

血气与道义:孟荀对“勇”的文本疏解与意义阐释

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人文杂志 2024年第6期 64-72页

作者：干春松南开大学哲学院绍兴文理学院

儒家有复杂的伦理道德谱系,而“勇”由“三达德”到孟子、荀子对勇的“限制性”肯定,是儒家伦理观念最值得关注的议题之一。孔子和孟子注重勇的情绪因素与理性判断的结合,并强调正义目标对勇的认定的重要性。而荀子则从勇的社会效果来... 详细信息

儒家有复杂的伦理道德谱系,而“勇”由“三达德”到孟子、荀子对勇的“限制性”肯定,是儒家伦理观念最值得关注的议题之一。孔子和孟子注重勇的情绪因素与理性判断的结合,并强调正义目标对勇的认定的重要性。而荀子则从勇的社会效果来判断其不同层次。从孔子、孟子到荀子的思想转变,也有助于我们理解战国时期社会环境对思想发展的影响。

关键词：浩然之气勇不动心孟子荀子

Effects of plants-associated microbiota on cultivation and quality of Chinese herbal medicines

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Chinese Herbal Medicines 2024年第2期16卷 190-203页

作者： Yue Ouyang Qiqing Cheng chunsong Cheng Ziyu Tang Yufeng Huang Eyu Tan Shaofeng Ma Xinheng Lin Ying Xie Hua Zhou Guangdong Provincial Hospital of Chinese Medicine Guangdong Provincial Academy of Chinese Medical SciencesState Key Laboratory of Dampness Syndrome of Chinese MedicineSecond Affiliated Hospital of Guangzhou University of Chinese MedicineGuangdong-Hong Kong-Macao Joint Lab on Chinese Medicine and Immune Disease ResearchGuangzhou 510006China Faculty of Chinese Medicine Macao University of Science and TechnologyMacao 999078China School of Pharmacy Hubei University of Science and TechnologyXianning 437100China Key Laboratory of Plant Ex-situ Conservation and Research Center of Resource Plant Lushan Botanical GardenChinese Academy of SciencesJiujiang 332900China Jiangmen Wuyi Hospital of Traditional Chinese Medicine Jiangmen 529020China Joint Laboratory for Translational Cancer Research of Chinese Medicine Ministry of EducationGuangzhou University of Chinese MedicineGuangzhou 510006China

Microbial resource influences the life activities of medicinal plants from several ***,rhizosphere microorganisms,and other environmental microorganisms play essential roles in medicinal plant growth and development,plant yield,and clinical *** microbiota can influence the biosynthesis of active compounds in medicinal plants by stimulating specific metabolic *** induce host plants to improve their resistance to environmental stresses by accumulating secondary *** can interact with their host plants to produce long-term,targeted selection results and improve their ability to adapt to the *** to the interdependence and interaction between microorganisms and medicinal plants,Chinese herbal medicines(CHMs)quality is closely related to the associated *** review summarizes the relationship between medicinal plants and their associated microorganisms,including their species,distribution,life activities,and *** can aid in quality control,improve the efficacy of medicinal plants,and provide markers for identifying the origin and storage time of ***,a comprehensive understanding of the relationship between microorganisms and medicinal plants will help to control the quality of CHMs from different perspectives.

关键词： Chinese herbal medicines endophytes environmental microorganisms microbiota rhizosphere microorganisms