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地震多发区域桥梁抗震设计提升策略分析
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作者 赵志杨 《中文科技期刊数据库(文摘版)工程技术》 2024年第11期009-012,共4页
在全球地震频发的背景下,交通基础设施遭受地震灾害的可能性越来越大。本文主要研究地震频发地区桥梁结构设计的改进策略。针对地震多发地区的地质和气候特点,桥梁抗震面临的主要问题,从场地选择与地基处理、结构优化与选材、施工质量... 在全球地震频发的背景下,交通基础设施遭受地震灾害的可能性越来越大。本文主要研究地震频发地区桥梁结构设计的改进策略。针对地震多发地区的地质和气候特点,桥梁抗震面临的主要问题,从场地选择与地基处理、结构优化与选材、施工质量与抗震性能保证、后期养护与监测体系构建等方面开展研究。以期通过科学合理地设计、施工、养护等措施,大幅提高桥梁结构的抗震性能与安全水平。 展开更多
关键词 桥梁抗震设计 地震多发区域 抗震性能 施工质量控制
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基于大数据的地震多发区域破坏程度估计模型设计 被引量:4
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作者 成桂兰 《地震工程学报》 CSCD 北大核心 2018年第3期604-611,共8页
传统基于GIS的地震破坏程度估计模型,对于大数据的分析和处理性能差,评估效果不够理想,所以要设计基于大数据的地震多发区域破坏程度估计模型。塑造的模型体系结构由数据服务层、业务模型层、应用展现层构成。模型由基础数据控制模块、... 传统基于GIS的地震破坏程度估计模型,对于大数据的分析和处理性能差,评估效果不够理想,所以要设计基于大数据的地震多发区域破坏程度估计模型。塑造的模型体系结构由数据服务层、业务模型层、应用展现层构成。模型由基础数据控制模块、地震危险性模块、结构破坏性模块、损失评估模块、决策控制模块、文档控制模块五大功能结构构成,设计直接经济损失模块的逻辑流程和页面展示结果。模块采用随机权神经网络实现大数据环境下地震灾害破坏程度快速评估。实验结果说明,所设计模型实现了大数据环境下地震多发区域破坏程度的有效评估,具有较高的评估效率和精度。 展开更多
关键词 大数据 地震多发区域 破坏程度 估计 模型 随机权 神经网络
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台风多发区域涉海工程设计极值流速的计算 被引量:1
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作者 任剑波 肖云客 《人民长江》 北大核心 2020年第S01期135-138,共4页
半埋式海底输油管线等海洋工程建设以后,由于底层水流的作用,会导致管道附近海域海床遭受冲刷,给管道安全带来很大的隐患。为了给海底管道等涉海工程选址提供设计参数,避免因底层流速过大而造成管道冲刷悬空,影响到管道的安全,采用三维... 半埋式海底输油管线等海洋工程建设以后,由于底层水流的作用,会导致管道附近海域海床遭受冲刷,给管道安全带来很大的隐患。为了给海底管道等涉海工程选址提供设计参数,避免因底层流速过大而造成管道冲刷悬空,影响到管道的安全,采用三维风暴潮流模型计算了管道区域重现期风暴潮流流速,并推算了海域表层、底层极值流速的分布情况。研究结果表明:2号站10 a一遇、20 a一遇和50 a一遇的表层最大流速分别为257,284 cm/s和323 cm/s,底层最大流速分别为188,203 cm/s和222 cm/s。20 a一遇的风暴潮流流速与潮流最大可能流速基本相近,因此风暴潮流影响不可忽略。 展开更多
关键词 工程设计极值流速 重现期风暴潮流计算 可能最大风暴潮流 涉海工程 台风多发区域
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全球高致病性禽流感灾害的时空变异 被引量:3
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作者 吕常荣 温家洪 +1 位作者 尹占娥 司瑞洁 《灾害学》 CSCD 2007年第2期25-30,共6页
利用多种资源建立了全球高致病性禽流感灾害数据库,基于ArcGIS的空间分析和统计模块,对全球高致病性禽流感灾害的时空变异进行分析。结果表明:2003年以来全球高致病性禽流感爆发有三个流行高峰期,正好在2004和2005年的冬季;全球高致病... 利用多种资源建立了全球高致病性禽流感灾害数据库,基于ArcGIS的空间分析和统计模块,对全球高致病性禽流感灾害的时空变异进行分析。结果表明:2003年以来全球高致病性禽流感爆发有三个流行高峰期,正好在2004和2005年的冬季;全球高致病性禽流感爆发的频率在最近几年里呈不断上升的趋势,地理空间范围不断扩散;高致病性禽流感的爆发在时间和空间上表现得更加集中。全球高致病性禽流感分布的总体特征表明在家禽密度高的区域,邻近家禽生产地的湖泊和水库附近,或者鸟类迁徒路线的交叉处,特别是那些重叠的区域可能是高致病性禽流感的多发地区。上述结果可为高致病性禽流感灾害的防控提供借鉴和依据。 展开更多
关键词 高致病性禽流感 时空变异 多发区域 全球
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Changing Rural Development Inequality in Jilin Province, Northeast China 被引量:9
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作者 CHENG Yeqing WANG Yanfei +1 位作者 WANG Zheye LUO Xiaolong 《Chinese Geographical Science》 SCIE CSCD 2013年第5期620-633,共14页
Rural development inequality is an important practical issue during the course of full establishment of a ′moderately well-off society′ in modern China,and the objective understanding and evaluation of the status an... Rural development inequality is an important practical issue during the course of full establishment of a ′moderately well-off society′ in modern China,and the objective understanding and evaluation of the status and regional inequality of rural development can provide scientific basis for ′building a new countryside′ and coordination development of rural-urban regions.Based on the county-level data of 2000,2005 and 2009,this paper examines the rural development inequality of Jilin Province in Northeast China by establishing a rural development index.The spatio-temporal dynamic patterns and domain factors are discussed by using the method of exploratory spatial data analysis and multi-regression model.The results are shown as follows.Firstly,most of the counties were in lower development level,which accounted for 58.3%,62.5% and 66.7% of the total counties in 2000,2005 and 2009,respectively.The characteristics of spatial inequality were very obvious at county level.For example,rural development level of Changchun Proper and the proper of seven prefecture-level cities were much higher than that of the surrounding regions.The counties in the eastern and northern Jilin Province were the lowest regions of rural development level,while the middle counties were the rapid growth areas in rural economy.Secondly,Moran′s I of rural development index(RDI) was 0.01,–0.16 and –0.06 in 2000,2005 and 2009,respectively,which indicated that spatial agglomeration of RDI was not obvious in Jilin Province,and took on the characteristic of random distribution.The counties of both the units and its adjacent units have higher development level(HH) were transferred from the western areas to the eastern areas,while the countries of both the units and its adjacent units have lower development level(LL) were diffused from the eastern to middle and western Jilin Province.Finally,the result of multi-regression analysis showed that the improvement of agricultural production condition,development of agricultural economics and the adjustment of industrial structure were the domain factors affecting rural development inequality of Jilin Province in the later ten years. 展开更多
关键词 rural development index exploratory spatial data analysis multi-regression model Jilin Province
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Impact of Regional Development on Carbon Emission: Empirical Evidence Across Countries 被引量:8
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作者 LI Guoping YUAN Yuan 《Chinese Geographical Science》 SCIE CSCD 2014年第5期499-510,共12页
Global warming is recently an urgent issue worldwide. The increase of carbon emissions induced by human economic activi- ties has become a major driving force behind global climate change. Thus, as a matter of social ... Global warming is recently an urgent issue worldwide. The increase of carbon emissions induced by human economic activi- ties has become a major driving force behind global climate change. Thus, as a matter of social responsibility, reasonable carbon con- straints should be implemented to ensure environmental security and sustainable development for every country. Based on a summary of studies that examined the relationship between carbon emissions and regional development, this paper shows that human activity-led carbon emission is caused by the combination of several influencing factors, including population size, income level, and technical pro- gress. Thus, a quantitative model derived from IPAT-ImPACT-Kaya series and STIRPAT models was established. Empirical analysis using multivariate nonlinear regression demonstrated that the origins of growing global carbon emission included the increasing influ- encing elasticity of the population size and the declining negative effect of technical progress. Meanwhile, in context of classification of country groups at different income levels, according to the comparison of fluctuating patterns of the influencing elasticity, technical progress was found as the main factor influencing carbon emission levels in high-income countries, and population size might he the controlling factor in middle-income countries. However, for low-income countries, the nonlinear relationship between carbon emission and its influencing factors was not significant, whereas population growth was identified as an important potential driving force in future carbon emissions. This study can therefore provide a reference for the formulation of policies on carbon constraints, especially to de- velop more efficient carbon mitigating policies for countries at different income levels. 展开更多
关键词 carbon emission regional development population size income level technical progress
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A Community and Ecosystem-based Sustainable Forest Management Model for Small Islands in Maluku
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作者 Agustinus Kastanya 《Journal of Agricultural Science and Technology(B)》 2012年第4期418-427,共10页
The research objective was to investigate past and current forest management practices in the Maluku archipelago, then to create a better management model to improve prosperity for local communities and to guarantee s... The research objective was to investigate past and current forest management practices in the Maluku archipelago, then to create a better management model to improve prosperity for local communities and to guarantee sustainability of forest ecosystems for future generations. Forest land use, the deforestation process, the potential for maintaining natural production forests and the need to establish a management unit for sustainability of natural production forests (PFMU) were analysed. The analysis model used Geographic Information System (GIS) and satellite imaging. The deforestation process was analysed using the multiple regression model. The research determined the importance of two concepts i.e., (1) A macro concept involving the integration of forest development with regional development and (2) A micro concept which detailed the format of the PFMU as a sub-set of the macro concept. The macro concept involves a new Forest Land Use Plan (FLUP), and the micro concept is a more detailed analysis of a sustainable PFMU, a Management Unit for Protection Forest (PrFMU) and a Management Unit for Conservation Forest (CFMU). Results showed that the existing FLUCP (Forest Land Use Consensus Plan) policy rather than guaranteeing the sustainability of forests, contributed to their deforestation. The integration of forest management and regional development strategies required the establishment of a new FLUP. 展开更多
关键词 Sustainable macro concept micro concept DEFORESTATION ecosystem.
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