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Shear resistance characteristics and influencing factors of root-soil composite on an alpine metal mine dump slope with different recovery periods

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Journal of Mountain Science 2024年第3期21卷 835-849页

作者： PANG Jinghao LIANG Shen liu yabin LI Shengwei WANG Shu ZHU Haili LI Guorong HU Xiasong Department of Geological Engineering Qinghai UniversityXining 810016China Key Laboratory of Genozoic Resource&Environment in North Margin of the Tibetan Plateau Xining 810016China

Artificial vegetation restoration is the main measure for vegetation restoration and soil and water conservation in alpine mine dumps on the Qinghai-Tibet Plateau,***,there are few reports on the dynamic changes and the influencing factors of the soil reinforcement effect of plant species after artificial vegetation restoration under different recovery *** selected dump areas of the Delni Copper Mine in Qinghai Province,China to study the relationship between the shear strength and the peak displacement of the root-soil composite on the slope during the recovery period,and the influence of the root traits and soil physical properties on the shear resistance characteristics of the root-soil composite via in situ direct shear *** results indicate that the shear strength and peak displacement of the rooted soil initially decreased and then increased with the increase of the recovery *** shear strength of the rooted soil and the recovery period exhibited a quadratic function *** is no significant function relationship between the peak displacement and the recovery *** positive correlations(P0.05)between the shear strength of the root-soil composite and the root length density,and the root volume ratio of the coarse roots to the fine roots.A significant negative linear correlation(P0.05)with the root traits,other soil physical property indices(the moisture content and dry density of the soil),and slope *** coarse-grain content is the main factor controlling the peak displacement of the rooted soil.

关键词： Alpine mine dump Artificial vegetation restoration period Rooted soil Shear resistance characteristics Root traits Soil physical properties

Mechanism underlying the uprooting of taproot-type shrub species in the loess area of northeastern Qinghai-Xizang Plateau, China

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Journal of Arid Land 2024年第10期16卷 1426-1443页

作者： LIANG Shen WANG Shu liu yabin PANG Jinghao ZHU Haili LI Guorong HU Xiasong School of Geological Engineering Qinghai University Key Laboratory of Genozoic Resource & Environment in North Margin of the Tibet Plateau

Characteristics of root pullout resistance determine the capacity to withstand uprooting and the slope protection ability of plants. However, mechanism underlying the uprooting of taproot-type shrub species in the loess area of northeastern Qinghai-Xizang Plateau, China remains unclear. In this study, a common taproot-type shrub, Caragana korshinskii Kom., in northeastern Qinghai-Xizang Plateau was selected as the research material. Mechanism of root-soil interaction of vertical root of C. korshinskii was investigated via a combination of a single-root pullout test and numerical simulation analysis. The results indicated that, when pulling vertically, axial force of the roots decreased with an increase in buried depth, whereas shear stress at root-soil interface initially increased and then decreased as burial depths increased. At the same buried depth, both axial force and shear stress of the roots increased with the increase in pullout force. Shear stress and plastic zone of the soil surrounding the root were symmetrically distributed along the root system. Plastic zone was located close to the surface and was caused primarily by tensile failure. In nonvertical pulling, symmetry of shear stress and plastic zone of the soil surrounding the root was disrupted. We observed larger shear stress and plastic zones on the side facing the direction of root deflection. Plastic zone included both shear and tensile failure. Axial force of the root system near the surface decreased as deflection angle of the pullout force increased. When different rainfall infiltration depths had the same vertical pulling force, root axial force decreased with the increase of rainfall infiltration depth and total root displacement increased. During rainfall infiltration, shear stress and plastic zone of the soil surrounding the root were prone to propagating deeper into the soil. These findings provide a foundation for further investigation of soil reinforcement and slope protection mechanisms

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Characterization of alpine meadow surface crack and its correlation with root-soil properties

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Journal of Arid Land 2024年第6期16卷 834-851页

作者： WU Yuechen ZHU Haili ZHANG Yu ZHANG Hailong liu Guosong liu yabin LI Guorong HU Xiasong School of Geological Engineering Qinghai UniversityXining 810016China Key Laboratory of the Cenozoic Resources and Environment on the North Rim of the Qinghai-Tibet Plateau Xining 810016China Qinghai Provincial Transportation Planning and Design Research Institute Co.Ltd. Xining 810002China

Quantifying surface cracks in alpine meadows is a prerequisite and a key aspect in the study of grassland crack *** characterization indices are crucial for the quantitative characterization of complex cracks,serving as vital factors in assessing the degree of cracking and the development *** far,research on evaluating the degree of grassland degradation through crack characterization indices is rare,especially the quantitative analysis of the development of surface cracks in alpine meadows is relatively ***,based on the phenomenon of surface cracking during the degradation of alpine meadows in some regions of the Qinghai-Tibet Plateau,we selected the alpine meadow in the Huangcheng Mongolian Township,Menyuan Hui Autonomous County,Qinghai Province,China as the study area,used unmanned aerial vehicle(UAV)sensing technology to acquire low-altitude images of alpine meadow surface cracks at different degrees of degradation(light,medium,and heavy degradation),and analyzed the representative metrics characterizing the degree of crack development by interpreting the crack length,length density,branch angle,and burrow(rat hole)distribution density and combining them with in situ crack width and depth ***,the correlations between the crack characterization indices and the soil and root parameters of sample plots at different degrees of degradation in the study area were analyzed using the grey relation *** results revealed that with the increase of degradation,the physical and chemical properties of soil and the mechanical properties of root-soil composite changed significantly,the vegetation coverage reduced,and the root system aggregated in the surface layer of alpine *** the degree of degradation increased,the fracture morphology developed from"linear"to"dendritic",and eventually to a complex and irregular"polygonal"*** crack length,width,depth,and length density were identified as the crack char

关键词： alpine meadow grassland degradation grassland cracks crack characterization index crack morphology root length density grey relation analysis

新批评理论阐释中国古诗的困境与反思——以颜元叔《析春望》及其批评为中心

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中国文学批评 2024年第1期 126-134,M0005页

作者：刘亚斌浙江外国语学院中国语言文化学院杭州310023

颜元叔在运用新批评理论进行本土化实用批评中,借鉴布鲁克斯的悖论方法,对杜甫诗作《春望》中语言、意象和诗篇布局的矛盾结构及其复义关系进行深入的解读,挖掘诗歌文本的丰富内蕴,但也指出其文本结构上的“鼠尾”弊端。某种程度上说,... 详细信息

颜元叔在运用新批评理论进行本土化实用批评中,借鉴布鲁克斯的悖论方法,对杜甫诗作《春望》中语言、意象和诗篇布局的矛盾结构及其复义关系进行深入的解读,挖掘诗歌文本的丰富内蕴,但也指出其文本结构上的“鼠尾”弊端。某种程度上说,新批评对中国古典诗歌的阐释存在与矛盾,忽视了杜甫作为代表性诗人所依凭的儒家文化结构及其诗教传统,从而得出不当的结论。杜诗文本的有机整体性深受传统文化结构及其诗教的制约。在西方文论本土化批评实践中对中国诗人及其作品要有同情性态度,考虑文化诗学的面向,消除强制阐释带来的不利影响,使批评和研究更具科学性。

关键词：颜元叔新批评《析春望》矛盾结构

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新媒介文学阅读的文化逻辑及其阐释路径

广州大学学报（社会科学版） 2024年第1期23卷 95-106页

作者：刘亚斌浙江外国语学院中国语言文化学院浙江杭州310023

自网络文学诞生以来,学术界基于社会状况、媒介特征和文本内容等阐释途径,建构了现代性、后现代和数字现代主义三种新媒介文学阅读的文化逻辑。现代性文化逻辑是由走向现代化国家的社会现实状况决定的,但网络文学中明显可见其阅读的后... 详细信息

自网络文学诞生以来,学术界基于社会状况、媒介特征和文本内容等阐释途径,建构了现代性、后现代和数字现代主义三种新媒介文学阅读的文化逻辑。现代性文化逻辑是由走向现代化国家的社会现实状况决定的,但网络文学中明显可见其阅读的后现代性;网络媒介带来了读写的后现代文化逻辑,却遭受到现代性立场的批判;数字现代主义将网络媒介与网络文学区隔,主张文本内容及其主题的新现代性,陷入媒介文艺学的内在矛盾中;它们存在着文学内容和主题的困境、媒介作为中介的片面性以及语言文本的过分重视等不足。要把握新媒介文学阅读的文化逻辑,必须回到后现代的原初含义,认清其是建立在可操作、多元呈现和融合生成的界面上,且在读者、阅读文本和审美效果等方面具有“虚拟后现代”特性。新媒介文学阅读体现出阅读文化的范式转型和阐释学意义。

关键词：新媒介文学界面阅读文化逻辑阐释路径

梦幻虚构和时空体——巴赫金诗学的现实主义问题

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鲁东大学学报（哲学社会科学版） 2024年第3期41卷 88-96页

作者：刘亚斌浙江外国语学院中国语言文化学院杭州310023

韦勒克提出文学的虚构本性,与现实主义文论产生矛盾冲突。现实与虚构的关系是现实主义文论得以构建的关键所在,时空观念成为无法回避的问题。巴赫金认为复调小说的梦幻虚构显示出欧洲文学和俄罗斯文化传统,对资本主义、俄罗斯社会的本... 详细信息

韦勒克提出文学的虚构本性,与现实主义文论产生矛盾冲突。现实与虚构的关系是现实主义文论得以构建的关键所在,时空观念成为无法回避的问题。巴赫金认为复调小说的梦幻虚构显示出欧洲文学和俄罗斯文化传统,对资本主义、俄罗斯社会的本质认识,以及陀思妥耶夫斯基本人经历的体验与思考,广场节庆活动则是其最终根源。广场狂欢化的现实及其世界性感知方式深刻影响了陀氏小说的内容表现和文本形式,形成其中介性空间和瞬间性时间相结合的时空体观念。从时空体形式及其比例关系来看,欧洲小说有其具体的时空表现和现实的场所标记。广场时空体让现实和梦幻、常态和怪诞、除旧和新生的世界交织和转换,复调小说体现出现实主义的最高意义,巴赫金诗学推动了现实主义文论的深入发展。

关键词：巴赫金诗学现实主义梦幻虚构时空体

低碳城市建设对城市经济增长的影响——基于277个城市的面板数据

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中国商论 2024年第11期 164-168页

作者：刘璐刘亚彬西藏大学西藏自治区文化和旅游厅西藏拉萨850000

本文运用双重差分模型针对2000—2021年中国255个地级及以上城市的面板数据,进行低碳城市试点政策对城市经济增长的影响评估,通过平行趋势检验与安慰剂检验,表现出良好的政策唯一性特征,并进一步分析其中的作用机制和异质性特征。研究发... 详细信息

本文运用双重差分模型针对2000—2021年中国255个地级及以上城市的面板数据,进行低碳城市试点政策对城市经济增长的影响评估,通过平行趋势检验与安慰剂检验,表现出良好的政策唯一性特征,并进一步分析其中的作用机制和异质性特征。研究发现:低碳城市试点政策能够促进城市经济增长,从分区位来看,东部城市的低碳城市试点政策效应明显高于中西部城市,黄河流域城市受政策影响获得的经济效益要高于非黄河流域城市,从分政策执行批次来看,第一批试点的回归系数最大,其次是第三批次,最后是第二批次,这种正向推动作用主要通过产业结构优化路径实现。

关键词：低碳城市建设低碳经济城市经济增长双重差分法异质性分析

贵州钼镍矿山尾矿资源调查及重金属污染情况分析

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现代矿业 2024年第5期40卷 208-212页

作者：刘亚彬曾芳贵州省自然资源勘测规划研究院

为了对贵州钼镍矿山尾矿进行有效的防治管理,针对钼镍矿山尾矿资源开展了调查及取样分析,结合前人对尾矿堆周围重金属污染程度、黑色页岩风化与重金属污染之间的关系等分析研究成果,对尾矿环境污染风险进行了初步评估。分析结果表明:钼... 详细信息

为了对贵州钼镍矿山尾矿进行有效的防治管理,针对钼镍矿山尾矿资源开展了调查及取样分析,结合前人对尾矿堆周围重金属污染程度、黑色页岩风化与重金属污染之间的关系等分析研究成果,对尾矿环境污染风险进行了初步评估。分析结果表明:钼镍矿山尾矿堆周围土壤中重金属Cd、Ni、As、Zn含量超标,与黑色页岩中重金属含量高背景相对一致,重金属Cd含量最高超标7.7倍,远高于黑色页岩中Cd的含量,可能存在其他来源;鉴于重金属Cd本身生物活性较高,迁移性较强,易进入土壤溶液并被农作物吸收的特性,建议在钼镍矿区土壤重金属生态风险评价和环境修复中,应重点关注重金属Cd的污染。

关键词：钼镍矿山尾矿重金属污染

三维重建技术在结直肠癌根治术中的应用效果及对机体免疫、胃肠功能及术后转归的影响

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现代肿瘤医学 2024年第18期32卷 3488-3494页

作者：赵斌刘继攀刘亚彬衡水市人民医院普外二科河北衡水053000

目的:探究三维重建技术在结直肠癌(colorectal cancer,CRC)根治术中的应用效果及对机体免疫、胃肠功能及术后转归的影响。方法:选取2020年01月至2023年04月我院收治的83例CRC患者,均行腹腔镜CRC根治术,将患者随机分为两组,对照组41例术... 详细信息

目的:探究三维重建技术在结直肠癌(colorectal cancer,CRC)根治术中的应用效果及对机体免疫、胃肠功能及术后转归的影响。方法:选取2020年01月至2023年04月我院收治的83例CRC患者,均行腹腔镜CRC根治术,将患者随机分为两组,对照组41例术前规划根据多排螺旋CT增强图像实施,观察组42例术前规划根据多层螺旋CT血管三维模型完成术实施。观察两组围术期指标、术后转归情况、术前及术后3 d、7 d胃肠功能、免疫T淋巴细胞(CD3^(+)、CD4^(+)、CD4^(+)/CD8^(+))及并发症情况。结果:观察组手术时间、术后首次排气、进半流食、首次排便及术后住院时间均短于对照组,术中出血量及术后24 h引流量低于对照组(P<0.05);观察组胃动素、胃泌素、胆囊收缩素术后3 d、7 d水平均高于对照组(P<0.05);观察组术后3 d、7 d CD3^(+)、CD4^(+)、CD4^(+)/CD8^(+)水平均高于对照组(P<0.05);观察组并发症发生率较对照组明显降低(P<0.05)。结论:三维重建技术辅助CRC根治术治疗CRC,能优化手术,减轻胃肠功能与免疫功能损伤,促进病情恢复,且可提高安全性。

关键词：结直肠癌结直肠癌根治术三维重建技术多排螺旋CT增强图像术后转归胃肠功能免疫T淋巴细胞并发症