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11月2日至5日,2013中国国际矿业大会在天津市举行。大会经国务院批准,由国土资源部和天津市人民政府共同主办,发展改革委、科技部、工业和信息化部、财政部、环境保护部、商务部、国家开发银行、中国进出口银行、中国银行以及世界银行、澳大利亚驻华大使馆、加拿大驻华大使馆、南非驻华大使馆、智利驻华大使馆等单位协办。 相似文献
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《CT理论与应用研究》2012,(4):646
《临床放射学杂志》是一份面向国内外公开发行的医学影像学学术性刊物。以"保证质量、具有特色、重视临床、普及提高"为办刊宗旨。辟有:读片窗、中枢神经放射学、头颈部放射学、胸部放射学、腹部放射学、骨骼肌肉放射学、介入放射学、小儿放射学、实验研究、医学 相似文献
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2013年12月24日,全国矿产资源潜力评价工作项目“全国重要矿产成矿地质背景研究”地质大运动八年抗战胜利收官。来自中国科学院、工程院的李廷栋、孙枢、刘宝琚、马宗晋、陈毓川、钟大赉、张国伟、刘嘉麒、莫宣学、王成善等十位院士、国务院参事张洪涛、国土资源部总工程师钟自然、国土资源部地质勘查司于海峰副司长、科技与国际合作司高平副司长、中国地质调查局李金发副局长、发展研究中心严光生主任、谭永杰总工、施俊法副总工程师等专家和领导出席评审验收会,项目成果评定为优秀等级。 相似文献
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2008年4月22日,太原市防震减灾领导组召开全市防震减灾工作会议。省地震局局长赵新平、市人大副主任李毓玲、市政府副市长吉久昌、市政协副主席张友君、市政府副秘书长冀克平、市人大教科文卫委员会主任委员赵雁萍等领导出席了会议。全市十县(市、区)、高新区、经济区、民营区分管领导、地震局局长,市防震减灾领导组成员单位分管领导,太钢、西山、太重、晋机和太铁分管领导及地震台台长,受表彰的先进集体和先进个人代表约百余人参加了会议。 相似文献
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William H. McDowell Miguel C. Leon Michelle D. Shattuck Jody D. Potter Tamara Heartsill-Scalley Grizelle González James B. Shanley Adam S. Wymore 《水文研究》2021,35(4):e14146
Catchments in the Luquillo Experimental Forest (LEF) of Puerto Rico are warm, wet and tropical with steep elevational relief creating gradients in temperature and rainfall. Long-term objectives of research at the site are to understand how changing climate and disturbance regimes alter hydrological and biogeochemical processes in the montane tropics and to provide information critical for managing and conserving tropical forest ecosystems globally. Measurements of hydrology and meteorology span decades, and currently include temperature, humidity, precipitation, cloud base level, throughfall, groundwater table elevation and stream discharge. The chemistry of rain, throughfall, and streams is measured weekly and lysimeters and wells are sampled monthly to quarterly. Multiple data sets document the effects of major hurricanes including Hugo (1989), Georges (1998) and Maria (2017) on vegetation, biota and catchment biogeochemistry and provide some of the longest available records of biogeochemical fluxes in tropical forests. Here we present an overview of the findings and the data sets that have been generated from the LEF, highlighting their importance for understanding montane tropical watersheds in the context of disturbance and global environmental change. 相似文献
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Belize Lane Irene Garousi-Nejad Melissa A. Gallagher David G. Tarboton Emad Habib 《水文研究》2021,35(7):e14273
The era of ‘big data’ promises to provide new hydrologic insights, and open web-based platforms are being developed and adopted by the hydrologic science community to harness these datasets and data services. This shift accompanies advances in hydrology education and the growth of web-based hydrology learning modules, but their capacity to utilize emerging open platforms and data services to enhance student learning through data-driven activities remains largely untapped. Given that generic equations may not easily translate into local or regional solutions, teaching students to explore how well models or equations work in particular settings or to answer specific problems using real data is essential. This article introduces an open web-based module developed to advance data-driven hydrologic process learning, targeting upper level undergraduate and early graduate students in hydrology and engineering. The module was developed and deployed on the HydroLearn open educational platform, which provides a formal pedagogical structure for developing effective problem-based learning activities. We found that data-driven learning activities utilizing collaborative open web platforms like CUAHSI HydroShare and JupyterHub to store and run computational notebooks allowed students to access and work with datasets for systems of personal interest and promoted critical evaluation of results and assumptions. Initial student feedback was generally positive, but also highlighted challenges including trouble-shooting and future-proofing difficulties and some resistance to programming and new software. Opportunities to further enhance hydrology learning include better articulating the benefits of coding and open web platforms upfront, incorporating additional user-support tools, and focusing methods and questions on implementing and adapting notebooks to explore fundamental processes rather than tools and syntax. The profound shift in the field of hydrology toward big data, open data services and reproducible research practices requires hydrology instructors to rethink traditional content delivery and focus instruction on harnessing these datasets and practices in the preparation of future hydrologists and engineers. 相似文献
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Flooding is one of the most costly natural disasters and thus mapping, modeling and forecasting flood events at various temporal and spatial scales is important for any flood risk mitigation plan, disaster relief services and the global (re-)insurance markets. Both computer models and observations (ground-based, airborne and Earth-orbiting) of flood processes and variables are of great value but the amount and quality of information available varies greatly with location, spatial scales and time. It is very well known that remote sensing of flooding, especially in the microwave region of the electromagnetic spectrum, can complement ground-based observations and be integrated with flood models to augment the amount of information available to end-users, decision-makers and scientists. This paper aims to provide a concise review of both the science and applications of microwave remote sensing of flood inundation, focusing mainly on synthetic aperture radar (SAR), in a variety of natural and man-made environments. Strengths and limitations are discussed and the paper will conclude with a brief account on perspectives and emerging technologies. 相似文献
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文章介绍了油气开发中主要关心的油气藏、井场设备及套管的监测技术和运用效果,油气藏监测主要是剩余油和油藏储藏物性的监测,套损直接影响油、水井的使用寿命、油、气产量和注水效果,井场设备运行的好坏直接关系油、气产量和注水效果,输油(注水)管道泄漏造成资源的浪费、人身伤害和环境污染事故.通过地球物理、地球化学及油气藏工程等检测和监测技术认识油气藏流体分布、性质、运动状态,评价套管、管线及井场设备的健康状况,为油田优化开发方案的制定、管理及实施提供依据. 相似文献
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T. A. Stadnyk 《水文研究》2024,38(5):e15166
Issues surrounding gender equality are—and should be—front and centre in the water resources community, and other science, technology, engineering and mathematics (STEM) fields. Very necessarily, the focus tends to be on recruitment, offering support for students and early career academics. The leaky pipeline concept used to describe the incremental loss of women from STEM fields with career duration describes a disproportionate loss of senior women, creating a parallel problem where highly qualified, top tier academics are lost from the system after significant financial and personnel investment by institutions. Ultimately, the leaky pipeline undermines the extensive investment of the hydrology and other STEM communities in equity, diversity, inclusion and accessibility (EDIA) recruitment and retention programmes by cutting short career ambitions and the trajectories of diverse top performing individuals, resulting in no net benefit of EDIA policy investments and a lack of diversity with seniority. Addressing this critical gender gap requires the attention and support of the hydrology community of practice with specific focus on generating opportunities for advancement, confronting systemic and structural biases and improving education around allyship. Institutions and professional organizations need to consciously grow diversity in leadership and recognize and outwardly manage the perception of academic excellence around slow research and education that attracts increased diversity. Supporting allyship, reducing competitiveness among community members and reinforcing collaboration will not only attract, but retain, a higher proportion of diversity in the hydrology community, academia and STEM professions in general. It is time for the water resources (and other STEM) communities to demand broader accountability and recognition of the barriers to women, implement and reward more diverse definitions of research excellence, and offer allyship training to the community of practice at large. 相似文献
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Silvana Hidalgo Michel Monzier Eduardo Almeida Gilles Chazot Jean-Philippe Eissen Johannes van der Plicht Minard L. Hall 《Journal of Volcanology and Geothermal Research》2008
The Atacazo–Ninahuilca Volcanic Complex (ANVC) is located in the Western Cordillera of Ecuador, 10 km southwest of Quito. At least six periods of Pleistocene to Holocene activity (N1 to N6) have been preserved in the geologic record as tephra fallouts and pyroclastic flow deposits. New field data, including petrographic and whole-rock geochemical analyses of over forty soil and tephra sections, 100 pumice and lithic samples, and 10 new 14C ages allow us to constrain: (1) the tephra fall isopachs and detailed characteristics of the last two events (N5–N6) including volume estimates of the tephra and pyroclastic flow deposits and the corresponding volcanic explosivity index (VEI); (2) the petrographical and geochemical correlations between domes, tephras, and pyroclastic flow deposits; and, (3) the timing of the last 4 eruptive events and a period of quiescence that endured a few thousand years (1000–4000). 相似文献
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基于《集装箱模块化组合房屋技术规程》中的要求,为提高模块化集装箱建筑的抗震性能,增加房屋的使用高度,提出了一种外框内箱结构,其由外框柱、外框梁和模块化集装箱拼装组成。为验证外框内箱结构的抗震性能,对六层传统集装箱结构和外框内箱结构进行了数值仿真分析,对比分析两种结构的层间位移角和构件应力分布等。结果表明:外框内箱结构竖向刚度分布均匀,受力更加合理,传力更加明确,能有效地减小内部集装箱构件内力,其能更好的实现结构"强柱弱梁和强节点"需求,提高结构的安全性和可靠性。 相似文献
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砂雨法是开展砂质土层和构筑物离心试验应用广泛的模型制备技术,以密实程度与均匀性为关键控制对象,直接关系试验结果的准确性和可靠性。针对砂雨装置、控制要素和均匀度测试等几个方面,概况总结了国内外离心模型砂雨法制备技术的研究进展与暴露的关键问题,归纳了现有砂雨装置的基本组成、操控特点和分类方法,阐述了稳态密实度范围及影响关键因素。综述模型空间均匀度的不同量测与评价方法,评述了各自优缺点与归一化评价标准。综合现状与不足,讨论了离心模型砂雨法制备技术的发展方向与趋势。 相似文献