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Research on Spatial Statistical Downscaling Method of Meteorological Data Applied to Photovoltaic Prediction

Energy Engineering 2022年第5期119卷 1923-1940页

作者： Yan Jin DingmeiWang Ruiping Zhang Haiying Dong School of Automation and Electrical Engineering Lanzhou Jiaotong UniversityLanzhou730000China Electric power Research Institute of State Grid Gansu Electric power Company Lanzhou730000China

Aiming at the low spatial resolution of meteorological data output from a numerical model in photovoltaic power prediction,a geographically weighted statistical downscaling method considers the influence factors such as normalized vegetation index(NDVI),digital elevation model(DEM),slope direction,longitude and latitude is *** method is based on the correlation between meteorological data and NDVI,DEM,slope direction,latitude and longitude,and introduces DEM and local Moran index to improve the regression model,and obtains 100∗100 m high-resolution meteorological spatial distribution ***,combining the measured data of the study area and the established EOF iterative downscaling method to verify and compare the downscaling *** results show that the error between the downscaled meteorological data and the measured value is smaller,and the comprehensive downscaling accuracy of the geographically weighted regression method is higher,and the model fitting effect is ***,this method can effectively improve the influence of errors caused by lower resolution,and provide a more reliable meteorological basis for the prediction of photovoltaic power.

关键词： Numerical model meteorological data resolving power

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Assessment of genetic diversity in Dalbergia sissoo clones through RAPD profiling

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Journal of Forestry Research 2011年第3期22卷 393-397页

作者： Meena Bakshi Arvind Sharma Plant Physiology Discipline Botany Division Forest Research Institute Dehradun 248 006 INDIA

We studied the genetic polymorphism among 29 clones of shisham （Dalbergia sissoo Roxb） belonging to different geographic regions using random amplified polymorphic DNA （RAPD） markers. Out of 30 primers used, only 20 primers generated polymorphism in amplified product. In total 232 bands were amplified with 20 primers, of which 192 （82%） were polymorphic with an average of 9.6 bands/primer. The resolving power （Rp） ranged from 2.14 （Primer 5） to 11.93 （Primer 4）. Primer 4 and Primer 3 possessed high Rp value. Polymorphism information content （PIC） ranged from 0.15 （Primer 5） to 0.37 （Primer 4）. Primer 4 amplified total 18 bands in 29 genotypes with PIC value of 0.37 hence; this set of primer was most informative. The similarity coefficient analysis revealed two clusters. The first cluster comprised of only 10 clones and the second major cluster comprised of 19 clones. The genetic similarity among 29 clones ranged from 25.86% （clone 10 and 235） to 100% （clone 19 and 59）, suggesting a wide genetic base in shisham clones.

关键词： clones clonal seed orchard Dalbergia sissoo RAPD polymorphism information content resolving power

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DDS（Direct Digital Synthesizer） Technique and Its Implementation in Homing System Test Equipment

DDS（Direct Digital Synthesizer） Technique and Its Implemen...

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2000年第16届世界计算机大会

作者： Liu Zhaohui Lu Gengsheng Naval Aeronautical Engineering Academy Qingdao Branch

＜正＞This paper describes the composition,the operating principle and the properties of Direct Digital Synthesizer,analyses the generating reason of DDS phase noise,studies the hardware and software designing method and engineering implementation of the signal resource for a homing system test equipment implemented with the key chip AD7008.

关键词： Frequency Synthesizer resolving power Phase Noise Homing System Test Equipment

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