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31.
襄樊——广济断裂西段的三里岗——三阳地区出露有构造混杂岩,以含蛇绿岩残块为特征,经历了复杂的构造变形和演化过程。不同区段的构造解析与对比表明,中生代以来该构造混杂岩带主要遭受了4期变形构造的叠加改造:1)高温塑性变形(D1),表现为蛇绿岩残块内部具网状强应变带和透镜状弱应变域相互交织的构造变形样式,强应变带形成以镁铁质糜棱岩为特征的高温韧性剪切带,显示深层次构造变形特征;2)逆冲推覆变形(D2),构造混杂岩带发育叠瓦状逆冲推覆构造和双冲构造,南界韧性剪切带是构造混杂岩带整体运移的主推覆面,发育长英质糜棱岩,形成于中等构造层次,岩石中发育镁铁质糜棱岩糜棱面理的褶皱构造,显示陆内逆冲推覆对先期高温塑性变形构造的叠加改造;3)韧脆性右行平移剪切(D3),形成构造混杂岩带内部浅层次构造变形,构造混杂岩带南侧的花山群钙质片岩揉皱变形,形成枢纽近直立的不对称褶皱,指示右行平移剪切变形;4)伸展正断层(D4),主要发育于构造混杂岩带北侧,呈NW——SE向展布,控制晚白垩世断陷盆地的形成与沉积充填。 相似文献
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结合计算判断法和经验对比法,构建了葡萄酒产业生命周期模型,从产业规模、产业市场结构、技术进步与效率以及政府角色四个维度出发,对中国葡萄酒产业发展阶段进行综合评判。应用皮尔生长曲线测算了中国葡萄酒产业各阶段演进时间、产业发展规模与速度以及产业峰值。结果表明,中国葡萄酒产业正处于成长期早期阶段,并在产品研发、产品市场消费结构、技术创新、产业组织提升等方面正进入一个重大的调整与升级时期。2013年和2019年分别为中国葡萄酒产业发展的"起飞点"与"飞跃点"。2026年开始中国葡萄酒产业将进入成熟期,届时产值将达到1 216.598×108元,并不断趋于产业饱和值1 541.949×108元,未来产业发展空间巨大。本研究对制订与产业生命周期阶段相吻合的政策,以实现产业的长期动态协调与均衡发展具有重要意义。 相似文献
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The dynamics of the teleconnection between the Indian Ocean Dipole(IOD) in the tropical Indian Ocean and El Ni?o-Southern Oscillation(ENSO) in the tropical Pacific Ocean at the time lag of one year are investigated using lag correlations between the oceanic anomalies in the southeastern tropical Indian Ocean in fall and those in the tropical Indo-Pacific Ocean in the following winter-fall seasons in the observations and in high-resolution global ocean model simulations. The lag correlations suggest that the IOD-forced interannual transport anomalies of the Indonesian Throughflow generate thermocline anomalies in the western equatorial Pacific Ocean, which propagate to the east to induce ocean-atmosphere coupled evolution leading to ENSO. In comparison, lag correlations between the surface zonal wind anomalies over the western equatorial Pacific in fall and the Indo-Pacific oceanic anomalies at time lags longer than a season are all insignificant, suggesting the short memory of the atmospheric bridge. A linear continuously stratified model is used to investigate the dynamics of the oceanic connection between the tropical Indian and Pacific Oceans. The experiments suggest that interannual equatorial Kelvin waves from the Indian Ocean propagate into the equatorial Pacific Ocean through the Makassar Strait and the eastern Indonesian seas with a penetration rate of about 10%–15% depending on the baroclinic modes. The IOD-ENSO teleconnection is found to get stronger in the past century or so. Diagnoses of the CMIP5 model simulations suggest that the increased teleconnection is associated with decreased Indonesian Throughflow transports in the recent century, which is found sensitive to the global warming forcing.The dynamics of the teleconnection between the Indian Ocean Dipole(IOD)in the tropical Indian Ocean and El Ni?o-Southern Oscillation(ENSO)in the tropical Pacific Ocean at the time lag of one year are investigated using lag correlations between the oceanic anomalies in the southeastern tropical Indian Ocean in fall and those in the tropical Indo-Pacific Ocean in the following winter-fall seasons in the observations and in high-resolution global ocean model simulations.The lag correlations suggest that the IOD-forced interannual transport anomalies of the Indonesian Throughflow generate thermocline anomalies in the western equatorial Pacific Ocean,which propagate to the east to induce ocean-atmosphere coupled evolution leading to ENSO.In comparison,lag correlations between the surface zonal wind anomalies over the western equatorial Pacific in fall and the Indo-Pacific oceanic anomalies at time lags longer than a season are all insignificant,suggesting the short memory of the atmospheric bridge.A linear continuously stratified model is used to investigate the dynamics of the oceanic connection between the tropical Indian and Pacific Oceans.The experiments suggest that interannual equatorial Kelvin waves from the Indian Ocean propagate into the equatorial Pacific Ocean through the Makassar Strait and the eastern Indonesian seas with a penetration rate of about 10%–15%depending on the baroclinic modes.The IOD-ENSO teleconnection is found to get stronger in the past century or so.Diagnoses of the CMIP5 model simulations suggest that the increased teleconnection is associated with decreased Indonesian Throughflow transports in the recent century,which is found sensitive to the global warming forcing. 相似文献
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The persistence barrier refers to the lag correlation of sea surface temperature anomalies (SSTA)
showing a rapid and significant decline in a specific season, regardless of the starting month. This implies
that there is a decrease in forecast skill for SSTA in this specific season. This paper investigates the
possible causes for the persistence barrier of SSTA in the South China Sea (SCS) and its adjacent regions
from the perspective of interannual-interdecadal time scales. The results show that the persistence barrier
of SSTA exists not only in the SCS, but also in the vicinity of Indonesia south of the equator. The SCS
barrier occurs around October--November, while the occurrence of the barrier in the Indonesia region is
around November--December. For these two regions, the occurrence of the persistence barrier is closely
associated with the interdecadal variability of SSTA, as well as the interannual variability. The persistence
barriers in the SCS and the Indonesia region do not exist alone if the interdecadal variability is not
considered, because SSTA have a short memory of less than 4 months, regardless of the starting month.
Moreover, the influence of the interdecadal variability of SSTA on the persistence barrier of SSTA in
the SCS and the Indonesia region may be associated with SSTA in the Indian Ocean and the western Pacific,
but is not closely associated with the Pacific Decadal Oscillation. However, compared with the spring
persistence barrier (SPB) of ENSO, the close relationship between the persistence barriers in the SCS and
the Indonesia region and the interdecadal variability is unique, since the ENSO SPB is not significantly
affected by such variability. In addition, although the persistence barriers in both the SCS and the
Indonesia region are quite obvious in strong ENSO cases, the interdecadal variability of SSTA also plays
a non-negligible role in this relationship. 相似文献