简介:Aresearchonthathowthetopicofmobility,whichiscompletelydifferentbuttightlyrelevanttospace,providesnewapproachesandmethodssoastopromotethefurtherdevelopmentofgeographicinformationservices,willaccumulatebasicexperiencefordifferenttypesofrelativeinformationsystemsinthewidefieldsoflocationbasedservices.Thispaperanalyzesthemeaningofmobilityandthechangeforgeographicinformationservicemodel,itdescribesthedifferencesandcorrelationbetweenM-GISandtraditionalGIS.Itsetsatechnicalframeworkofgeographicinformationservicesaccordingtomobilecontextandprovidesacasestudy.
简介:OnthebasisofthecharacteristicoftheperfectspatialdistributionoftheT/Paltimeterdata,aspatialharmonictidalanalysisisperformed,whichtransferstidalharmonicconstantsHandgofeachconstituentintoapairofparameters:thecosinepartUandsinepartV.Andeachpartisexpandedintoapolynomial.Thepolynomialcoefficientsareestimatedwithaltimeterdataupontheleastsquarescriteria.ThusthemodelsofprincipaltidalwavesintheSouthChinaSeaareestablished.72cyclesofT/Pdatafromcycle11through82areincludedinthecalculation.Themodelsareevaluatedwithdifferentapproachesanddataset.Theconclusionsarethatthetidemodescanprovidepartialtideamplitudeswith3cmaccuracy,andthatphaselagsdeviationofthosetideswithamplitudelargethan10cmarewithin±10°.
简介:太原市燃气设计有限公司是隶属于太原市煤气公司的全民所有制企业,是山西省建设厅资格审查批准可承担城镇燃气输配工程设计的专业单位。可担负燃气输配工程的项目建议书、可行性研究报告的编制、燃气输配管网、储配站、调压站和工业、公共建筑、居民用户庭院户内燃气工程施工图设计以及与之配套的土建、土暖.
简介:一个算法(微分模式)为沿着T/P的潮汐的分析追踪的泛音的改进被介绍,在哪个在邻近的点的观察海面高度之间的差别作为观察被拿。另外,观察方程与转线路分析的结果被抑制;参数估计被最少的广场在0.1°纬度间隔执行。盖住中国海和西北太平洋的周期10~330T/P高度表数据(2°-50°N,105°-150°E)为精制沿着轨道泛音被采用在8474个点的12成分的潮汐的分析,和泛音常数被获得,它显示算法罐头高效地在高度表观察移开非潮汐的效果,并且改进潮参数的精确。而且,沿着测高法轨道的参数比传统的算法获得的那些代表更光滑的分布。在从11厘米的潮汐的高度模型和到1.3厘米的观察还原剂之间的恰当的错误的根平均数广场。