检索结果-南通市图书馆

Journal of Earth Science 2024年

作者： zhijie jia Pietro Sternai jianbing Peng School of Geological Engineering and Geomatics， Chang'an University Department of Earth and Environmental Sciences， University of Milan-Bicocca chool of Geological Engineering and Geomatics， Chang'an University

Mantle plumes and surface erosion and sediment deposition affect the modes of continental lithospheric rupturing in extensional tectonic settings， modulating the evolution of rifting margins. However， their relative contributions to the overall evolution of rifting margins and possible roles in the formation of microcontinent are still elusive. Here， we use coupled geodynamic and surface processes numerical modeling to assess the extent to which surface processes may determine the formation of microcontinent during lithospheric stretching in presence or absence of a mantle plume underneath. Our modeling results indicate that fast extension rates and hillslope (i.e.， diffusion) erosion promote ridge jump events and therefore the formation of microcontinents. On the contrary， efficient fluvial erosion and far-reaching sediment transport (i.e.， stream power erosion) inhibits ridge jump events and the formation of microcontinents. The ridge jump event and overall evolution in our numerical models is consistent with the shift from the Mascarene Ridge to the Carlsberg Ridge that determined the formation of the Seychelles microcontinent. We therefore speculate that hillslope erosion， rather than fluvial erosion， was predominant during the formation of the Seychelles， a possible indication of overall dry local climate conditions.

关键词：

Formation Mechanism of Ground Fissures Originated from the Hanging Wall of Normal Fault:A Case in Fen-Wei Basin,China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Earth Science 2022年第2期33卷 482-492页

作者： zhijie jia jianbing Peng Quanzhong Lu jianwei Qiao Feiyong Wang Mingdong Zang Yang Liu Junyan Zhao Fengji Zhu School of Geological Engineering and Geomatics Chang an UniversityXi'an 710054China Key Laboratory of Western Mineral Resources and Geological Engineering Ministry of Education Chang'an UniversityXfan 710064China China JK Institute of Engineering and Design Xfan 710043China Shaanxi Key Laboratory for the Property and Treatment of Special Soil and Rock Xfan 710043China School of Engineering and Technology China University of GeosciencesBeijing 100083China

This paper takes Fen-Wei Basin(FWB)as a case to study the ground fissures controlled by normal *** on the field investigation,geophysical exploration,drilling,GNSS data and numerical calculation,the characteristics and mechanism of ground fissures originated from the hanging wall of normal faults are *** results show that the distribution of ground fissures in the hanging wall and heading wall of the active faults is not *** fissures are mostly distributed in the hanging wall of active faults and show a linear distribution on the surface,their strike is consistent with the fault,mainly characterized by vertical offset and horizontal *** fissures destroy the farmland and building foundation through which they pass and cause the rupture or *** profile section,the ground fissure shows the characteristics of normal faults and dislocates the strata,and is connected with the underlying *** analysis shows that the vertical displacement of normal fault activity in hanging wall is much larger than that in heading wall,which is the reason that tectonic ground fissures mainly originate from hanging *** range of dangerous area of ground fissures is controlled by the depth of fault,the strength of the ground fissures disaster is mainly controlled by the activity of *** formation of the ground fissures originated from the hanging wall of the fault experienced three stages:the main fault activity stage,the secondary fault activity stage and the fissure formation stage.

关键词： ground fissure Fen-Wei Basin active fault dislocation theory formation mechanism hazards engineering geology

A Comprehensive Method for the Risk Assessment of Ground Fissures:Case Study of the Eastern Weihe Basin

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2023年第6期34卷 1892-1907页

作者： zhijie jia jianbing Peng Quanzhong Lu Penghui Ma jianwei Qiao Feiyong Wang Mingdong Zang Yang Liu Junyan Zhao Fengji Zhu School of Geological Engineering and Geomatics Chang'an UniversityXi'an 710054China Key Laboratory of Western Mineral Resources and Geological Engineering Ministry of Education Chang'an UniversityXi'an 710064China China JK Institute of Engineering and Design Xian 710043China School of Engineering and Technology China University of GeosciencesBeijing 100083China

Ground fissures are influenced by the coupling of geological factors and human *** threaten the safety of infrastructure and restrict town planning in many areas in *** of the area most severely affected by ground fissures is the Weihe Basin in North China,which has the most extensive distribution of ground fissures and all the elements that control their occurrence,pro-viding an ideal study area for the study of ground *** this study,we took the eastern Weihe Ba-sin as the study area and determined the distribution and hazard characteristics of ground fissures via field *** on the analytic hierarchy process,we propose a multi-level,comprehensive method for evaluating the hazards of ground *** method considers the geological back-ground,development status,and triggering factors of ground fissures,including all nine currently known assessment indices of ground *** used judgment matrices to rank the constructed ground fissure assessment index system at the single and total levels and quantified the nine assessment indices of ground fissures according to the field survey ***,we plotted the ground fissure risk zoning map and evaluated the ground fissure risk at the study *** findings indicated that the proposed method could facilitate ground fissure hazard assessment and prediction and provide support for hazard prevention and urban/rural planning.

关键词： ground fissure analytic hierarchy process hazards risk assessment hazard prevention

Influencing factors and contribution analysis of CO_(2) emissions originating from final energy consumption in Sichuan Province,China

在线全文

学校读者我要写书评

暂无评论

Regional Sustainability 2022年第4期3卷 356-372页

作者： LIU Wei jia zhijie DU Meng DONG Zhanfeng PAN Jieyu LI Qinrui PAN Linyan Chris UMOLE College of Resources and Environment Chengdu University of Information TechnologyChengdu610225China Environmental Planning Institute Ministry of Ecology and EnvironmentChengdu610225China

Within the context of CO_(2)emission peaking and carbon neutrality,the study of CO_(2)emissions at the provincial level is *** Province in China has not only superior clean energy resources endowment but also great potential for the reduction of CO_(2)***,using logarithmic mean Divisia index(LMDI)model to analysis the influence degree of different influencing factors on CO_(2)emissions from final energy consumption in Sichuan Province,so as to formulate corresponding emission reduction countermeasures from different paths according to the influencing *** on the data of final energy consumption in Sichuan Province from 2010 to 2019,we calculated CO_(2)emission by the indirect emission calculation *** influencing factors of CO_(2)emissions originating from final energy consumption in Sichuan Province were decomposed into population size,economic development,industrial structure,energy consumption intensity,and energy consumption structure by the Kaya-logarithmic mean Divisia index(LMDI)decomposition *** the same time,grey correlation analysis was used to identify the correlation between CO_(2)emissions originating from final energy consumption and the influencing factors in Sichuan *** results showed that population size,economic development and energy consumption structure have positive contributions to CO_(2)emissions from final energy consumption in Sichuan Province,and economic development has a significant contribution to CO_(2)emissions from final energy consumption,with a contribution rate of 519.11%.The industrial structure and energy consumption intensity have negative contributions to CO_(2)emissions in Sichuan Province,and both of them have significant contributions,among which the contribution rate of energy consumption structure was 325.96%.From the perspective of industrial structure,secondary industry makes significant contributions and will maintain a restraining effect;from the perspective of ener

关键词： CO_(2)emissions Final energy consumption Logarithmic mean Divisia index(LMDI)model Industrial structure Grey relation analysis Sichuan Province

国有企业、价格管制与经济稳定——来自中国特色汽柴油市场的视角

在线全文

学校读者我要写书评

暂无评论

中国人口·资源与环境 2022年第7期32卷 173-185页

作者：贾智杰林伯强西安交通大学经济与金融学院陕西西安710049 厦门大学管理学院福建厦门361005 厦门大学中国能源政策研究院福建厦门361005

国际油价的大幅度波动对经济不确定性带来较大影响,2018年以来,中国的石油对外依存度已经超过了70%。文章从具有“中国特色”的汽柴油市场定调价机制的角度出发,利用动态递归的可计算一般均衡模型,模拟并研究了国际油价波动的条件下,汽... 详细信息

国际油价的大幅度波动对经济不确定性带来较大影响,2018年以来,中国的石油对外依存度已经超过了70%。文章从具有“中国特色”的汽柴油市场定调价机制的角度出发,利用动态递归的可计算一般均衡模型,模拟并研究了国际油价波动的条件下,汽柴油市场不同的定价机制(完全市场化价格或带有“基准价+浮动价”的价格管制手段)带来的影响。研究结果认为,当国际油价上涨时,价格管制具有较强的抗冲击能力,能够缓解大量的GDP下行压力,提振国内石油的生产与消费,同时起到稳定市场、保护居民购买力、控制通胀、防止人民币贬值等作用。但是这一切的好处不是没有代价的,政府将会损失1.57%~3.22%的总税收收入。另外,由于价格管制阻碍了油价上升的价格效应和替代效应,相对于完全竞争市场,能源消费量将增加,碳排放总量将上升,新能源发展也受到一定阻碍。油价下跌时价格管制的影响与上涨时的影响相反。研究注意到,过低的国际油价会也会降低中国的经济水平,更多的生产要素会流入石油加工企业,对第三产业带来一定的冲击,但是价格管制能够很好地缓解这一现象的发生。文章认为价格管制手段一定程度将外部对企业和居民的冲击转移为对政府的冲击,政府成了外部风险的阻滞剂。考虑到价格管制带来的负面环境问题,在国际油价上涨时需要必要的可再生能源支持政策;考虑到国际形势以及成品油市场的价格管制具有抗风险作用,文章建议应当看到价格管制积极的一面,可待中国石油依存度适当下降至可控范围后,再考虑放开价格管制手段。

关键词：国际油价汽柴油市场价格管制可计算一般均衡(CGE)模型

在线全文

学校读者我要写书评

暂无评论

频道化讲述:神话在电视媒介中的再语境化

西北民族研究 2024年第2期 94-105页

作者：贾志杰北京市社会科学院文化研究所北京100101

神话的电子媒介讲述已成为当今社会的普遍现象,其中电视是神话展演最丰富的媒介之一。然而学界对此类现象的阐释显得力度不够,原因之一是长期以来神话学界一直存在着重内容而轻媒介的研究取向,对媒介本体与神话讲述的关系认识不足。在... 详细信息

神话的电子媒介讲述已成为当今社会的普遍现象,其中电视是神话展演最丰富的媒介之一。然而学界对此类现象的阐释显得力度不够,原因之一是长期以来神话学界一直存在着重内容而轻媒介的研究取向,对媒介本体与神话讲述的关系认识不足。在媒介能动性的视角下,电子媒介并不是惰性的、静态的,而是可以形塑神话讲述活动的重要因子。就电视媒介而言,频道化讲述是重要的节目播出机制,它在一定程度上形塑了神话的讲述方式和呈现形态。中央广播电视总台少儿频道神话创演节目《少年的奇幻世界》提供了一个典型案例,其所展演的神话在内容、形式、功能等方面都受到电视台和频道立场的规约,在频道化讲述的机制中被再语境化,鲜明展现了媒介对神话讲述的形塑力。

关键词：神话电视媒介的能动性频道化讲述《少年的奇幻世界》

在线全文

学校读者我要写书评

暂无评论

四川电网建设运维面临的挑战和解决措施

高电压技术 2016年第4期42卷 1091-1099页

作者：张星海贾志杰国网四川省电力公司电力科学研究院成都610072

由于四川电网特殊的地形地貌,其建设运维面临着各种灾害和风险,包括藏区联网工程谐波过电压风险、其大量输电线路穿越重覆冰区和无人区、特高压输电线路及接地极线路缺陷故障频发、输电线路走廊地质脆弱、滑坡泥石流风险较大等。针对上... 详细信息

由于四川电网特殊的地形地貌,其建设运维面临着各种灾害和风险,包括藏区联网工程谐波过电压风险、其大量输电线路穿越重覆冰区和无人区、特高压输电线路及接地极线路缺陷故障频发、输电线路走廊地质脆弱、滑坡泥石流风险较大等。针对上述问题进行了大量研究并提出了解决措施,包括藏区联网工程谐波过电压风险评估及防控技术研究、覆冰监测预警及防冰保线技术研究、基于高压等电位取能及无线蜂窝网格网络自组网技术的输电线路视频巡检系统在电网"四无"地区的应用、基于地线感应的输电线路在线监测装置取能技术研究、宾金特高压直流工程接地极线路断线故障分析及解决措施、输电走廊滑坡和泥石流监测预警技术研究6个方面。未来将加强电网防灾减灾技术的研发与应用以及特高压交直流输电建设与运维技术研究,打造大电网安全运行技术支撑体系。

关键词：谐波过电压覆冰无人区接地极滑坡泥石流

在线全文

学校读者我要写书评

暂无评论

迈向碳中和:中国减煤路径的模拟与评估

中国人口·资源与环境 2024年第6期34卷 9-20页

作者：贾智杰杨香义西安交通大学经济与金融学院陕西西安710049

为应对全球气候变暖问题,中国提出努力争取2060年前实现碳中和的目标。目前,中国的主要碳排放源自能源消费,而能源消费仍以煤炭消费为主。因此,减少煤炭消费成为中国实现碳中和目标的关键第一步。该研究通过构建动态递归可计算一般均衡... 详细信息

为应对全球气候变暖问题,中国提出努力争取2060年前实现碳中和的目标。目前,中国的主要碳排放源自能源消费,而能源消费仍以煤炭消费为主。因此,减少煤炭消费成为中国实现碳中和目标的关键第一步。该研究通过构建动态递归可计算一般均衡模型,深入探讨了多种减煤路径,包括煤炭去产能、碳税、碳交易和煤炭资源税等。通过情景模拟,评估了这些途径在达成相同减煤效果时,对宏观经济、碳排放、产业及能源结构的影响。研究发现,在中国特有的能源体系中,实施减煤路径必将带来碳排放的降低,但不同路径对GDP、产业结构和能源结构的影响却不尽相同。具体来说,煤炭去产能和煤炭资源税对GDP的负面影响最轻,但对于推动产业结构和能源结构的清洁转型没有显著效果,主因是企业能够通过采购廉价能源来维持低成本,从而未根本改变能源成本,且大幅度提升了对外能源依赖度;碳税、碳交易及其混合机制显著促进了产业结构的优化,虽然减排效果更佳,却对经济总量造成了较大的负面影响,因为该类路径考虑了所有能源品种的碳排放成本。建议:一是应注重需求侧减煤路径和碳减排政策的协同效应,完善碳交易机制,尽早将其他高耗能行业纳入碳交易体系,同时需要注意严格碳排放总量控制可能带来的经济损失风险;二是推进电力市场化改革,实现“碳-电”协同减排,将是未来20年减煤降碳的核心策略;三是借助电力市场化的红利,优化煤炭替代策略,如火电可逐步从基荷功能转变为调峰功能。

关键词：碳中和减煤路径煤炭消费可计算一般均衡(CGE)模型

融合历史轨迹的智能汽车城市复杂环境多目标检测与跟踪算法

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

西安交通大学学报 2018年第10期52卷 132-140页

作者：隗寒冰陈尧贾志杰赖锋重庆交通大学车辆与汽车工程学院东风汽车集团有限公司技术中心

针对现有智能汽车环境感知算法多根据特定类型目标设计,在处理目标遮挡、光照突变等城市复杂场景时识别准确率较低的问题,提出一种基于网状分类器与融合历史轨迹的多目标检测与跟踪算法。该算法考虑各目标之间的遮挡关系,利用具有目标... 详细信息

针对现有智能汽车环境感知算法多根据特定类型目标设计,在处理目标遮挡、光照突变等城市复杂场景时识别准确率较低的问题,提出一种基于网状分类器与融合历史轨迹的多目标检测与跟踪算法。该算法考虑各目标之间的遮挡关系,利用具有目标融合功能的网状分类器对多尺度滑动窗获取的待检窗口进行多目标检测;历史检测结果基于目标特征关联通过计算目标长短轨迹和历史轨迹可靠性验证生成历史轨迹库,该轨迹库用于预测或融合新的检测结果;利用该检测跟踪结果更新网状分类器中的标准差分类器、最近邻分类器和历史轨迹信息,直至完成多目标长时跟踪。实验结果表明,本文算法在目标遮挡、光照变化和阴雨天气的复杂城市环境下均可实现多目标长时间检测跟踪,与KITTI数据集样本相比,平均准确率在77.17%～81.32%之间,单帧图像平均耗时0.05s,具有较好的实时应用前景。

关键词：智能汽车城市环境网状分类器多目标检测历史轨迹

检测GIS固体绝缘内部放电缺陷的特高频和X射线数字成像联合方法研究

在线全文

学校读者我要写书评

暂无评论

高压电器 2017年第12期53卷 253-257,264页

作者：雷汉坤贾志杰国网攀枝花供电公司四川攀枝花617000 国网四川电力科学研究院成都610072

相比超声波局部放电检测法,特高频局部放电检测法对GIS固体绝缘内部放电缺陷检测灵敏度和定位精度较高,但由于无法确证此类缺陷部位和类型,据此制定的设备检修策略难以保证完善、准确。因此,本文研究了特高频局部放电和X射线数字成像联... 详细信息

相比超声波局部放电检测法,特高频局部放电检测法对GIS固体绝缘内部放电缺陷检测灵敏度和定位精度较高,但由于无法确证此类缺陷部位和类型,据此制定的设备检修策略难以保证完善、准确。因此,本文研究了特高频局部放电和X射线数字成像联合检测GIS固体绝缘内部放电缺陷的方法,使用特高频局部放电检测法对固体绝缘缺陷进行检测和定位后,在设备检修期间应用X射线数字成像技术对缺陷进行可视化确证。该方法在某110 kV变电站110 kV GIS的带电检测中成功发现隔离开关绝缘拉杆内部电树枝缺陷,表明该方法有助于提升GIS固体绝缘内部局部放电的检测和定位效果,为检修提供可靠依据。

关键词：特高频局部放电 X射线固体绝缘