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不同冷却模式下高温花岗岩力学特性演变规律试验研究

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太原理工大学学报 2024年第2期55卷 267-275页

作者：辛国旭郤保平杨欣欣董赟盛何水鑫吴阳春太原理工大学矿业工程学院太原030024 太原理工大学原位改性采矿教育部重点实验室太原030024 中南大学资源与安全学院长沙410006

【目的】探索相同高温状态下花岗岩在不同冷却模式(20℃水中热冲击冷却和20℃空气中自然冷却)下不同的力学特性。【方法】采用实验室自研热冲击破裂实验平台,对两种冷却模式下不同温度状态(25~600℃)花岗岩进行单轴抗压、巴西劈裂、变... 详细信息

【目的】探索相同高温状态下花岗岩在不同冷却模式(20℃水中热冲击冷却和20℃空气中自然冷却)下不同的力学特性。【方法】采用实验室自研热冲击破裂实验平台,对两种冷却模式下不同温度状态(25~600℃)花岗岩进行单轴抗压、巴西劈裂、变角剪切试验,测试其单轴抗压强度、抗拉强度、内聚力、内摩擦角宏观力学参数,研究不同冷却模式下高温花岗岩力学特性的演变规律。【结果】结果表明:1)冷却模式对单轴抗压强度、抗拉强度、内聚力的影响较大,对内摩擦角几乎无影响;2)相同高温状态下花岗岩力学强度在20℃水中热冲击冷却劣化更严重,且300℃为两种冷却模式出现差异的阈值温度;3)当加热温度为600℃时,热冲击冷却后花岗岩的单轴抗压强度、抗拉强度、抗剪强度(内聚力)与自然冷却模式下相比分别降低了27.6%、51.7%、33%,这说明冷却模式对花岗岩力学强度影响从大到小依次为抗拉强度、抗剪强度、抗压强度。【结论】研究结果可为相同工况下高温岩石力学工程岩体稳定性分析提供了一定的参考。

关键词：高温花岗岩冷却模式热冲击力学特性演变规律

维普期刊数据库博看期刊

Comparison of mixing layer height inversion algorithms using lidar and a pollution case study in Baoding, China

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Journal of Environmental Sciences 2019年第5期31卷 81-90页

作者： Xiangguang Ji Cheng Liu Zhouqing Xie Qihou Hu yunsheng dong Guangqiang Fan Tianshu Zhang Chengzhi Xing Zhuang Wang Zeeshan Javed Jianguo Liu School of Environmental Science and Optoelectronic Technology University of Science and Technology of China Key Lab of Environmental Optics and Technology Anhui Institute of Optics and Fine Mechanics Hefei Institutes of Physical Science Chinese Academy of Sciences School of Earth and Space Sciences University of Science and Technology of China Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Anhui Province Key Laboratory of Polar Environment and Global Change University of Science and Technology of China

Beijing–Tianjin–Hebei area is suffering from atmospheric pollution from a long time. The understanding of the air pollution mechanism is of great importance for officials to design strategies for the environmental governance. Mixing layer height(MLH) is a key factor influencing the diffusion of air pollutants. It plays an important role on the evolution of heavy pollution events. Light detection and ranging(lidar), is an effective remote-sensing tool, which can retrieve high spatial and temporal evolution process within mixing layer(ML), especially the variation of MLH. There are many methods to retrieve MLH, but each method has its own applicable limitations. The Mie-lidar data in Beijing was firstly used to compare three different algorithms which are widely used under different pollution *** find that the multi-layer structure near surface may cause errors in the detection of mixing layer. The MLH retrieved based on image edge detection was better than another two methods especially under heavy polluted episode. Then we applied this method to investigate the evolution of the mixing layer height during a pollution episode in December2016. MLH at Gucheng county showed the positive correlation with the concentration of particulate matters during the start of this pollution episode. The elevated pollution level in Gucheng was not associated with MLH's decrease, and the significantly increased particulate matters raised the boundary layer, which trapped the pollutants near the surface.

关键词： Mixing layer Beijing–Tianjin–Hebei area Severe haze

Comparison of Two Air Pollution Episodes over Northeast China in Winter 2016/17 Using Ground-Based Lidar

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Journal of Meteorological Research 2018年第2期32卷 313-323页

作者： Yanjun MA Hujia ZHAO yunsheng dong Huizheng CHE Xiaoxiao LI Ye HONG Xiaolan LI Hongbin YANG Yuche LIU Yangfeng WANG Ningwei LIU Cuiyan SUN Institute of Atmospheric Environment China Meteorological Administration Shenyang 110016 Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences Hefei 230031 State Key Laboratory of Severe Weather/Institute of Atmospheric Composition Chinese Academy of Meteorological Sciences Beijing 100081 Dalian Municipal Meteorological Observatory Dalian 116001 Jinan Center of Aviation Control Jinan 250107

This study analyzes and compares aerosol properties and meteorological conditions during two air pollution episodes in 19–22（E1） and 25–26（E2） December 2016 in Northeast China. The visibility, particulate matter（PM） mass concentration, and surface meteorological observations were examined, together with the planetary boundary layer（PBL） properties and vertical profiles of aerosol extinction coefficient and volume depolarization ratio that were measured by a ground-based lidar in Shenyang of Liaoning Province, China during December 2016–January *** suggest that the low PBL height led to poor pollution dilution in E1, while the high PBL accompanied by low visibility in E2 might have been due to cross-regional and vertical air transmission. The PM mass concentration decreased as the PBL height increased in E1 while these two variables were positively correlated in E2. The enhanced winds in E2 diffused the pollutants and contributed largely to the aerosol transport. Strong temperature inversion in E1 resulted in increased PM2.5 and PM10 concentrations, and the winds in E2 favoured the southwesterly transport of aerosols from the North China Plain into the region surrounding Shenyang. The large extinction coefficient was partially attributed to the local pollution under the low PBL with high ground-surface PM mass concentrations in E1,whereas the cross-regional transport of aerosols within a high PBL and the low PM mass concentration near the ground in E2 were associated with severe aerosol extinction at high altitudes. These results may facilitate better understanding of the vertical distribution of aerosol properties during winter pollution events in Northeast China.

关键词： aerosol pollution ground-based lidar Northeast China

中国社会思想及其现代性第七届中国社会思想史年会综述

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社会 2010年第2期30卷 235-240页

作者：董运生吉林大学哲学社会学院社会学系

2009年11月13日至15日，由中国社会思想史专业委员会、吉林大学社会发展理论创新基地和吉林大学哲学社会学院联合举办的“中国社会思想及其现代性”学术研讨会在吉林大学召开，本次会议同时也是中国社会思想史的第七届年会。来自中国社... 详细信息

2009年11月13日至15日，由中国社会思想史专业委员会、吉林大学社会发展理论创新基地和吉林大学哲学社会学院联合举办的“中国社会思想及其现代性”学术研讨会在吉林大学召开，本次会议同时也是中国社会思想史的第七届年会。来自中国社会科学院、南京大学、南开大学、武汉大学、复旦大学、中国人民大学、北京工业大学、山东大学等科研机构和高校的50余名专家学者出席了会议。在两天的会议日程中，与会代表就相关问题展开了热烈讨论，取得了丰硕的成果，现就主要议题和观点作简要梳理。

关键词：中国社会科学院社会思想史年会综述现代性吉林大学社会发展理论中国人民大学北京工业大学

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网络秩序的建构:共同体与公共性

中共中央党校学报 2015年第4期19卷 39-43页

作者：董运生吉林大学哲学社会学院吉林长春130012

网络作为现实社会的一面镜子,其上的任何思想动态无不反映着社会现实中人们的思维观念。社会转型期面临现实和网络的双重失范,失序的规避与秩序的重构成为引人关注的课题。网络共同体的产生,革新了社会成员的生活方式和思维模式,将松散... 详细信息

网络作为现实社会的一面镜子,其上的任何思想动态无不反映着社会现实中人们的思维观念。社会转型期面临现实和网络的双重失范,失序的规避与秩序的重构成为引人关注的课题。网络共同体的产生,革新了社会成员的生活方式和思维模式,将松散的个体汇集在一起形成了社会认同的基础。通过对公共话题的关注和探讨,社会成员由围观到行动、由分歧到共识,网络公共性不断地凝聚和建构。网络共同体的形成与网络公共性的建构对网络秩序发挥着日益重要的作用。网络社会研究中获得的启发,也为社会治理提供了新的思考。

关键词：网络社会共同体公共性社会认同双重失范

Vertical Distribution Characteristics of PM2.5 Observed by a Mobile Vehicle Lidar in Tianjin, China in 2016

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Journal of Meteorological Research 2018年第1期32卷 60-68页

作者： Lihui LYU yunsheng dong Tianshu ZHANG Cheng LIU Wenqing LIU Zhouqing XIE Yan XIANG Yi ZHANG Zhenyi CHEN Guangqiang FAN Leibo ZHANG Yang LIU Yuchen SHI Xiaowen SHU Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences Hefei 230031 University of Science and Technology of China Hefei 230026 Tianjin Academy of Environmental Sciences Tianjin 300191 Chinese Academy of Sciences Wuxi Photonics Co. Ltd. Wuxi 214135 The AirForce Military Representative's Office in Beijing Beijing 100086

We present mobile vehicle lidar observations in Tianjin, China during the spring, summer, and winter of 2016. Mobile observations were carried out along the city border road of Tianjin to obtain the vertical distribution characteristics of PM2.5. Hygroscopic growth was not considered since relative humidity was less than 60% during the observation experiments. PM2.5 profile was obtained with the linear regression equation between the particle extinction coefficient and PM2.5 mass concentration. In spring, the vertical distribution of PM2.5 exhibited a hierarchical structure. In addition to a layer of particles that gathered near the ground, a portion of particles floated at 0.6–2.5-km height. In summer and winter, the fine particles basically gathered below 1 km near the ground. In spring and summer, the concentration of fine particles in the south was higher than that in the north because of the influence of south wind. In winter, the distribution of fine particles was opposite to that measured during spring and summer. High concentrations of PM2.5 were observed in the rural areas of North Tianjin with a maximum of 350 μg m^–3 on 13 December2016. It is shown that industrial and ship emissions in spring and summer and coal combustion in winter were the major sources of fine particles that polluted Tianjin. The results provide insights into the mechanisms of haze formation and the effects of meteorological conditions during haze–fog pollution episodes in the Tianjin area.

关键词： mobile vehicle lidar vertical concentration profile fine particle

基于流-固耦合理论的水体下盾构隧道施工渗流规律

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太原理工大学学报 2020年第5期51卷 634-640页

作者：郤保平陈路海董赟盛太原理工大学矿业工程学院太原030024 太原理工大学原位改性采矿教育部重点实验室太原030024 济南城建集团有限公司济南250000

借助有限差分软件FLAC3D,依托太原地铁2号线双塔西街—大南门站下穿迎泽湖区段盾构隧道工程,基于流-固耦合理论分别建立5,10,20,30 m湖水深度下该区段隧道流-固耦合三维计算模型,对比分析4种湖水深度下盾构隧道开挖过程中地表的沉降量... 详细信息

借助有限差分软件FLAC3D,依托太原地铁2号线双塔西街—大南门站下穿迎泽湖区段盾构隧道工程,基于流-固耦合理论分别建立5,10,20,30 m湖水深度下该区段隧道流-固耦合三维计算模型,对比分析4种湖水深度下盾构隧道开挖过程中地表的沉降量、围岩渗透性和管片内力分布。结果表明:盾构隧道地表沉降量及水平位移随湖水深度的增大而增大;各工况下隧道周围的孔隙水压力随着盾构隧道的开挖而显著减小,水力坡降在隧道拱顶、拱腰两侧明显增大,致使隧道拱顶、拱腰两侧极易发生涌水事故;流-固耦合作用下,盾构管片内力与水头压力呈正相关性,盾构隧道管片配筋设计中应考虑上覆水体水头压力对其产生的显著影响。

关键词：流-固耦合水下隧道盾构隧道施工扰动地表沉降渗流规律内力分布

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马卫机器人题材小小说研究

重庆三峡学院学报 2021年第5期37卷 30-39页

作者：董运生重庆三峡学院文学院重庆404020

三峡本土作家马卫的机器人题材小小说密切关注现实,在审视、批判的同时也就现实中存在的问题展开了一定的思索,富有强烈的人文精神。在他的机器人题材小小说中,机器人是人的一种“镜像”,科幻、荒诞、方言等元素的采用,凸显了小小说的... 详细信息

三峡本土作家马卫的机器人题材小小说密切关注现实,在审视、批判的同时也就现实中存在的问题展开了一定的思索,富有强烈的人文精神。在他的机器人题材小小说中,机器人是人的一种“镜像”,科幻、荒诞、方言等元素的采用,凸显了小小说的深刻性和趣味性。由于马卫的机器人题材小小说多采取人本主义立场,因而在一定程度上呈现出思想开放性不够、审视视角较为单一等局限。

关键词：马卫机器人小小说人文精神

互文性视域下的《戎马恋》与《感情的野马》研究

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重庆三峡学院学报 2022年第2期38卷 97-106页

作者：董运生重庆三峡学院文学院重庆404020

互文性理论认为文本间存在着开放的吸收与转化关系,这对打破文本的封闭性、全面深刻认识文本具有重要意义。姚雪垠《戎马恋》和臧克家《感情的野马》均为抗战时期创作的反映当时青年爱情问题的作品,在内容、细节、思想等方面存在诸多互... 详细信息

互文性理论认为文本间存在着开放的吸收与转化关系,这对打破文本的封闭性、全面深刻认识文本具有重要意义。姚雪垠《戎马恋》和臧克家《感情的野马》均为抗战时期创作的反映当时青年爱情问题的作品,在内容、细节、思想等方面存在诸多互涉之处。两部作品对抗战环境下青年爱情问题的关注,尤其是对女性在救亡、启蒙、爱情活动中地位与力量的书写,在中国现代文学史上有着不可磨灭的价值与意义。

关键词：互文性《戎马恋》《感情的野马》爱情女性