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简介:Withthecontinuousprogressofnew-typeurbanizationinKarstmountainarea,howtocorrectlydealwiththerelationshipbetweenurbaneconomyandlanduseareattractingmuchattention.Basedontheland-usechangedata,thispaperanalyzesthecharacteristicsoflandusechangeanditsdrivingfactorsinGuiyangwiththemethodofland-usedynamicanalysis,landutilizationandfactorcorrelationanalysis.Wegetthefollowingresults:(1)thechangeoflandusewasobviousduring2004and2012.Theareaofarablelandandotherlandweredecreased,therateofdecreaseare3.89%and8.24%.Inthemeantime,aseriesofconstructionlandandforestareaincreasedalot,therateofincreaseare3.89%and8.24%.(2)Theintegratedlandusedynamicdegreeoftworesearchstages(2004-2009and2009-2012)weredecreasedfrom2.12%to0.34%,thissuggestsdynamicchangesoflandtendtobestable.(3)FourkindsofLanduseclasshaveagreatcontributiontotheindexoflandusedegreerespectively.Thecompositeindexoflandusedegreerosefrom229.58to247.19during2004and2012;thelanduseisstillinthedevelopmentstage.(4)Economy,population,transportationandpolicyguidancearethemaindriversoflandusechange.
简介:TheYDT1625-11microphoneandTeyuerwall-screentypestereomusicalsystemismadebytheBeijingKingCatAcousticsEquipmentFactorywithmulti-patenttechnology.Itisnotedforitsthinness,fullrangeoffrequencybands,andlowdistortionThesuper-thingeontetricformoffersconvenienceforusers.Thefrequencybandscoverawideacousticfieldfromlowtohighfrequencies.Thedistortionislowerthantheinternationalfirststepindex,favourableforthedesignandmanufactureoftheacousticsystem.Thefinedrivingsystemraisestherigidityofthediaphragm,thevalueofdynamicandtheradiatingconditionsofexcitationsource.
简介:【摘 要】 在电站“水调”和“电调”过程中,水头的短期变化会对机组的平稳运行产生影响。在运行中的影响工作水头因素较多,结合某工程消能调流电站实际运行的情况进行详细研究,制定运行方案,保障机组平稳运行。
简介:1974年,美国政府为给自由女神像翻新,扔下大堆废料,向社会招标处理.好几个月过去了,没人应标,因为在纽约州,垃圾处理有严格规定,弄不好会受到环保组织起诉的.