基于PCA RBF的风电场短期风速订正方法研究     

邓华  张颖超  顾荣  黄飞  支兴亮 《气象科技》2018,46(1):10-15

风电功率预测中最重要的因子是风速,准确的风速预测是风电功率预测的前提和基础。为了提高短期风速预测的准确性,本研究采用WRF模式,对我国上海崇明吕四风电场的风速进行预报。在此基础上,利用PCA-RBF算法结合WRF模式预报风向、气温、气压等气象要素对预报风速进一步订正。实验结果表明,利用PCA-RBF算法对WRF模式预报风速进行订正后,预报风速的误差进一步减小,相对均方根误差降低20%~30%,相对平均绝对误差降低15%~20%。与其他智能算法(BP算法、LSSVM算法)对比分析后得出,PCA-RBF算法对WRF模式预报风速具有较好的订正效果,能够有效提高风速预报准确率。  相似文献   

Geochronology,geochemistry and geological significance of Early Cretaceous volcanic rocks from Niangniangshan Formation,Ningwu Basin,middle and lower reaches of the Yangtze River     

PING Zhilan  WANG Li  ZHANG Yajing  XIN Wei  LI Liang  QIAN Lingyu 《世界地质(英文版)》2020,(1):1-15

Ningwu Basin is one of the Mesozoic continental volcanic basins in the middle and lower reaches of the Yangtze River.The volcanic rocks of the Longwangshan,dawangshan,Gushan and Niangniangshan formations,as well as the homologous subvolcanic rocks or small intrusions,are developed from old to new in the Ningwu Basin.Zircon U-Pb dating results show the latialite phonolite of Niangniangshan Formation was erupted at 128±1 Ma(i.e.,Early Cretaceous).The latialite phonolite contains moderate SiO2 contents(57.28%-60.96%)with high Na 2O+K 2O contents,belonging to shoshonite series.The samples have high REE contents,and display right-inclined REE distribution pattern.They are characterized by enrichment in some large ion lithophile elements(e.g.,LILEs,Rb,K),and depletion in some high field strength elements(e.g.,HFSEs,Nb,Ta,Ti).All volcanic samples have relatively depleted Nd isotopic compositions(ISr=0.707197--0.707878;εNd(t)=-0.5--0.9),indicating no genetic relationship with the lower crust of Yangtze plate,but a drift trend towards the EMII.The geochemical data suggest that the Early Cretaceous latialite phonolite was derived from the partial melting of an enriched lithospheric mantle metasomatized by subduction-related fluids in an arc-related setting.Based on the temporal and spatial distribution and geochemical variation characteristics of the regional volcanic rocks,it is suggested that the tectonic system within the study area changed from a subduction-related compression to an extensional environment in the early Early Cretaceous,which was caused by the ridge subduction of the Paleo-Pacific Ocean.  相似文献   

基于超融合架构的虚拟化技术在气象行业的应用效果对比          下载免费PDF全文

汪华  支亚京  郭茜  刘国强  李波 《中低纬山地气象》2023,47(2):105-108

随着当前气象行业的硬件、数据、系统的集约化程度越来越高,气象基础设施资源云平台已经成为省级最重要的两个基础平台之一,为了让省级基础设施资源池在气象行业得到更好的应用,本文对传统虚拟化技术与超融合架构两种不同技术构建的资源池开展架构灵活性、扩展性、技术特点、差异性等方面的对比,重点分析在气象行业场景中的实际应用效果,得出超融合架构在虚拟化存储和安全方面优势明显,为省级基础设施资源池的技术选型提供参考。  相似文献   

北部湾地区海陆经济关联研究          下载免费PDF全文

范雅静  陈宝珍 《海洋开发与管理》2016,33(12):28-31

在全国经济发展的大趋势下,作为中国与东盟各国联系的重要通道,北部湾经济区发展海洋经济势在必行,而海洋经济的发展离不开陆域经济的支撑。文章主要分析北部湾地区海陆经济一体化发展的状况和规律,建立海洋经济和陆域经济的关联分析模型,对北部湾地区海陆经济一体化发展进行评价,分析其发展优势和机遇挑战,最后提出相关政策建议。  相似文献   

Empirical calibration of the clinopyroxene–garnet magnesium isotope geothermometer and implications     

Wang-Ye Li  Fang-Zhen Teng  Yilin Xiao  Hai-Ou Gu  Xiang-Ping Zha  Jian Huang 《Contributions to Mineralogy and Petrology》2016,171(7):61

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Effects of different leaching water sources and volume on soil salt and chemical properties in a soil mesocosm experiment     

Hua Zhang  Linhong Wu  Wei Gu  Yingjun Xu  Jun Tao 《Environmental Earth Sciences》2016,75(8):667

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Hot dark spot index method based on multi-angular remote sensing for leaf area index retrieval     

Qingyan Meng  Chunmei Wang  Xingfa Gu  Yunxiao Sun  Ying Zhang  Rumiana Vatseva  Tamas Jancso 《Environmental Earth Sciences》2016,75(9):732

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Quantifying soil erosion effects on soil productivity in the dry-hot valley,southwestern China   总被引：1，自引：0，他引：1  

Xingwu Duan  Bing Liu  Zhijia Gu  Li Rong  Detai Feng 《Environmental Earth Sciences》2016,75(16):1164

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Assessment of heavy metal contamination in water body and riverbed sediments of the Yanghe River in the Bohai Sea,China     

Cuiping Kuang  Yunchi Shan  Jie Gu  Haibing Shao  Wanlei Zhang  Yongfeng Zhang  Jiabo Zhang  Huixin Liu 《Environmental Earth Sciences》2016,75(14):1105

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Indium Mineralization in Copper–Tin Stratiform Skarn Ores at the Saishitang–Rilonggou Ore Field,Qinghai, Northwest China          下载免费PDF全文

Jianping Liu  Xiangping Gu  Yongjun Shao  Yuzhou Feng  Jianqing Lai 《Resource Geology》2016,66(4):351-367

The Saishitang–Rilonggou Ore Field (SROF), which includes the Saishitang, Tongyugou, and Rilonggou ore deposits as well as other scattered occurrences, is located in the Elashan region in Qinghai Province, and is a significant Cu–Sn ore field in NW China. These ores are hosted in stratiform skarn deposits with the main metals being Cu and Sn, as well as Zn, Pb, Au, Ag, and trace elements (e.g. Ga, Ge, Se, and In). Bulk‐rock geochemical analyses of 50 ore samples from the three deposits show that In contents in the Saishitang deposit range from 0.03 to 39 ppm (average 12.7 ppm, n = 19), with 1000 In/Zn values that vary from >0.01 to 29.83 (average 4.29). Indium contents in the Tongyugou deposit vary from 7.51 to 131 ppm (average 28.37 ppm, n = 13), with 1000 In/Zn values from 0.74 to 48 (average 17.55). Finally, indium contents in the Rilonggou deposit vary from 0.73 to 120 ppm (average 36.15 ppm, n = 18), with 1000 In/Zn values from 0.33 to 47 (average 8.52). Indium is hosted mainly in sphalerite, while some other In‐bearing minerals (e.g., roquesite, stannoidite, and stannite) are present locally within the ore field. Roquesite, which replace or fill bornite, occurs in bornite‐rich ores in the Saishitang deposit. This is the first reported Chinese locality of roquesite. Based on previously reported Zn resources, a total of 136 tons of In is calculated to be hosted in the SROF, with 30, 66, and 40 tons of In attributed to the Saishitang, Tongyugou, and Rilonggou deposits, respectively. The differences in indium contents among the deposits and their respective geological histories and characteristics suggest that the origin of indium relates to volcanogenic metallogenesis in an early Permian volcano‐sedimentary basin. Based on the evaluation of In resources, future mining operations should include the recovery of indium in the Tongyugou and Rilonggou deposits.  相似文献