CINRAD/SA(B)发射机高压打火组件级故障诊断     

潘新民  白水成  崔炳俭 《气象科技》2016,44(2):184-191

新一代天气雷达技术保障中,发射机高压负载打火导致的综合故障的诊断和定位是比较复杂的,具有故障点多、故障涉及组件多、故障修复时间长等特点,是新一代天气雷达故障维修的难点。依据发射机高压控制和监控信号流程,提出了发射机高压打火组件级故障诊断流程。通过发射机组件级故障诊断流程快速修复发射机高压负载打火综合故障过程,表明发射机高压打火组件级故障诊断流程在雷达维修中具有规范化和适用性维修效果,进一步显示出故障分析诊断流程在新一代天气雷达技术保障中的重要作用。  相似文献   

南海海岛自动气象站防护应用技术探索     

甘志强  陆土金  高涛  井高飞  崔学林  黄斌 《气象科技》2016,44(6):913-917

立足海南及南海的自然条件,结合海岛自动气象站在南海高温、高湿、高盐雾、强辐射、强风等恶劣气候环境下使用情况,通过对历年来海岛自动气象站故障及失效模式的统计和分析,总结分析故障原因。根据设备维护人员多年气象设备保障工作积累总结的经验,从海岛自动气象站结构和防护要求出发,集成应用市场上优质材料、先进工艺和多种成熟、关键设备防护技术,形成一些气象设备防护的有效方法措施,以提高海岛自动气象站对海洋环境的适应性和性能,延长设备使用寿命。  相似文献   

Comparison of a fuzzy control and the data-driven model for flood forecasting     

Yixiang Sun  Deshan Tang  Yifei Sun  Qingfeng Cui 《Natural Hazards》2016,82(2):827-844

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A Survey of the Spatio-Temporal Data Model   总被引：1，自引：0，他引：1  

Wu Qunyong  Sun Mei  Cui Lei 《地球科学进展》2016,31(10):1001-1011

Traditional GIS(Geographic Information System)mostly can only describe the transient state data and does not have the ability to deal with the temporal dynamic data. When the data changes, new data will take the place of the old data, namely the transient state change into another, and the old data will disappear. Therefore, it is unable to make an analysis of the updating changes of the data and predict the development trend of the future. In this case, TGIS (Temporal Geographic Information System) emerges and expands the time dimension on the basis of traditional GIS. Spatio-temporal data model is the key to TGIS. Spatio-temporal data modeling is not only related to dynamic expression of spatio-temporal objects, but also gives an important support for spatio-temporal analysis and reasoning. This paper summarized the theories and applications status at home and abroad of spatio-temporal data model in detail, illustrated family tree of spatio-temporal data model for the nearly fifty years, discussed improvement and application status of Base State with Amendments Model, Event-based Spatio-temporal Data Model, Object-oriented Data Model and other spatio-temporal data models, and raised the existing problems of spatio-temporal data model. The current existing problems mainly includes: ①There are a lot of spatio-temporal data models put forward, but some of them only focus on semantic design and neglect the verified; ②Most of existing spatio-temporal data model are for vector data, only the Event-based Spatio-temporal Data Model is raster data structure; ③At present, the expression the time-space information of geographic entity is relative separated with spatio-temporal data model; ④Spatio-temporal data model is mainly used in cadastral management, land use and forestry data updating, less application in other fields. In the end, the future development direction was put forward of spatio-temporal data model. In the time of big data and “Internet plus”, it is necessary to explore the big data spatio-temporal data model that supports multiple data formats.  相似文献   

强度折减法在某核电站泵房边坡分析中的应用     

马波  顾生泉  葛鸿辉 《岩土工程技术》2016,(4):193-198

对边坡稳定性分别采用按极限平衡法、有限元强度折减法进行二维分析,通过对比计算结果来验证强度折减法分析的准确性与可行性。针对边坡开挖与加固及隧洞开挖的三维效应,采用三维弹塑性有限元强度折减法分析计算边坡的稳定性,计算分析了开挖完成、支护完成条件下边坡安全系数、位移分布、主应力分布、等效塑性应变区和潜在滑动面。结果表明,支护加固可较大提高边坡的稳定安全系数,三维强度折减法分析在岩土工程领域具有明显优势。  相似文献   

Atmospheric insight to climatic signals of δ~(18)O in a Laohugou ice core in the northeastern Tibetan Plateau during 1960–2006     

WenTao Du  ShiChang Kang  Xiang Qin  XiaoQing Cui  WeiJun Sun 《寒旱区科学》2016,8(5):367-377

δ~(18)O variations;;ice core;;outgoing longwave radiation;;meridional wind;;northeastern Tibetan Plateau  相似文献   

Livelihood changes and evolution of upland ethnic communities driven by tourism: a case study in Guizhou Province,southwest China     

Ya-juan Li  Hu Yu  Tian Chen  Jing Hu  Hai-yang Cui 《山地科学学报》2016,13(7):1313-1332

As an effective livelihood approach to alleviate poverty without rural population migration, ethnic tourism has become the primary choice of economic development in ethnic areas worldwide in addition to traditional livelihood approaches. This article applies the theories of livelihood to study the community evolution driven by tourism livelihood and examine three mountainous tourism communities in different stages of tourist area life cycle. Drawing on the methods of GIS spatial analysis, semi-structured interviews and questionnaires, this article proposes a sustainable livelihood framework for ethnic tourism to explore the evolution of ethnic tourism communities by identifying changes in livelihood assets (natural, financial, social, cultural and human capitals) in the process of tourism development. The results show that the development of ethnic tourism has led to changes in the increase of building land, and the diversification of land use functions with a trend of shifting from meeting local villagers' living needs to satisfying tourists, income composition and uneven distribution of tourism income spatially. Ethnic tourism also led to the deterioration of traditional social management structure, collapse of neighboring relationship, the over- commercialization and staged authenticity of ethnic culture, as well as the gradual vanish of agricultural knowledge with a trend of increasing modern business knowledge and higher education. In addition, these changes, involving livelihood assets from natural, economic, human, social and cultural aspects are interrelated and interactive, which form new evolution characters of ethnic community. This study reveals the conflicts over livelihood approaches which have formed new vulnerabilities to impact on sustainable evolution of ethnic communities. This research provides implications for achieving the sustainable development of ethnic communities with the driving force of tourism livelihood.  相似文献   

Impacts of land management on ecosystem service delivery in the Baiyangdian river basin   总被引：1，自引：0，他引：1  

Yang Bai  Bo Jiang  Juha M. Alatalo  Changwei Zhuang  Xiaoyuan Wang  Lijuan Cui  Weihua Xu 《Environmental Earth Sciences》2016,75(3):258

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GIS-based nitrogen removal model for assessing Florida’s surficial aquifer vulnerability     

Celena Cui  Wendy Zhou  Mengistu Geza 《Environmental Earth Sciences》2016,75(6):526

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Protection of neighbour buildings due to construction of shield tunnel in mixed ground with sand over weathered granite     

Qing-Long Cui  Huai-Na Wu  Shui-Long Shen  Zhen-Yu Yin  Suksun Horpibulsuk 《Environmental Earth Sciences》2016,75(6):458

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