简介：从2002～2004的广东每日的力量负担和它到气象学的变量的连接的可变性特征与小浪分析和关联分析被分析。预言方程用优化子集回归被建立。一个线性增加趋势是很重要、季节的变化的结果表演是明显的。力量负担展出重要伪周刊(5-7天)摆动，quasi-by-weekly(10-20天)摆动和intraseasonal(30-60天)摆动。这些摆动被大气的低频率摆动和公共假期引起。广东每日的力量负担的变化显然在在星期天的减少，特别地象在中国新年期间的一个漏斗一样塑造。最小在第一和第二天被发现，力量负担逐渐地在劳动白天和国庆节的长假期期间在第三天以后增加到正常水平。广东力量负担对温度最敏感，它是主要影响因素，作为在在中国的另外的区域。力量负担也在不同季节期间与另外的气象学的元素有关系到某程度。在夏天的力量负担的最大值，最小在劳动白天和国庆节期间在中国新年和变化期间好使用优化子集回归和财务为工作日和假期的效果建立的方程适合并且预言。

简介：WestatisticallyanalyzethetropicaltyphoonformingintheSouthChinaSeaanduseTC(TropicalCyclone)forshortinthefollowing)bytyphoonyearbook.Thetyphoonquantityisverydifferentindifferentmonthsandyears.TCappearsinallmonthsexceptMarch,andthemostTCquantityinayearis11,theleastis1and6.2onaverage.ThemostTCquantityinamonthis5andtheleastis0.TClandsmostinAugustandnoTClandsonChinesecontinentfromDecembertothefollowingApril.TheprimarylandingareaisbetweenShantouandHainanIsland.ThesustainingperiodofTCisusuallybetween4daysto7days,andthelongestis19days.Only15%oftheTCformingintheSouthChinaSeacanintensifytotyphoon,andtheyallformintheoceanareadeeperthan150m.TheSouthChinaSeaistheoceanareaoverwhichtheTCoccursfrequently.

简介：Techniquesofartificially-triggeredlightninghaveprovidedasignificantlyusefulmeanstodirectlymeasurevariousphysicalparametersoflightningdischargeandtoconductresearchonprotectionmethodsoflightningelectromagneticpulses.Inthisstudy,usingcapacitiveandresistivedividers,currentprobesandopticalfibertransmissiondevices,wemeasuredandanalyzedtheinducedovervoltageontheoverheadtransmissionlineandtheovercurrentthroughSurgeProtectiveDevices(SPD)whenalightningdischargewasartificiallytriggerednearbyonAugust12,2008atConghuaFieldLightningExperimentSite.Thetriggeredlightningdischargecontainedaninitialcurrentstageandeightreturnstrokeswhosepeakcurrentsrangedfrom6.6kAto26.4kA.WefoundthatovercurrentsthroughSPDwereinducedonthepowerlinebothduringtheinitialcontinuouscurrentstageandthereturnstrokeprocesses.Duringthereturnstrokes,theresidualvoltageandthecurrentthroughtheSPDlasteduptothems(millisecond)range,andtheovercurrentsexhibitedameanwaveformupto22/69μswithapeakvalueoflessthan2kA.Basedontheobserveddata,simplecalculationsshowthatthecorrespondingsingledischargeenergywasmuchgreaterthanthevaluesofthehighvoltagepulsegeneratorscommonlyusedintheexperimentsregulatedforSPD.TheSPDdischargecurrentpeakwasnotsynchronoustothatoftheresidualvoltagewiththeformerobviouslylaggingbehindthelatter.TheSPDdischargecurrentpeakwaswellcorrelatedwiththetriggeredlightningcurrentpeakandthewave-frontcurrentgradient.ThelongdurationoftheSPDcurrentisoneofthemajorreasonswhytheSPDwasdamagedevenwithabignominaldischargecurrent.