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1、四符号说明(x,y,/z):坐标的空间位置;Thespacecoordinates;f(x.yjt):重金属的空间分布浓度；Theconcentrationofheavymetalspatialdistribution;':空间某点的属性值;Apointofattributevalues;"i:点("J)到点(壬,％)的水平距离；thehorizontaldistanceofPoint(x,y)to(Xi,Yi);P:反距离加权插值函数的加权幕指数；Weightedexponentialinversedistaneeweightedinter
2、polationfunction;®:反距离加权插值函数中各点浓度的权重；Theweightofeachpointconcentrationofinversedistaneeweightedinterpolationfunction;R：相关系数矩阵;Correlationmatrix.久：特征根；Characteristicroot;特征向量；Thefeaturevector;〃：主成分载荷；Principalcomponentloadings;PC:主成分贡献率；Principalcomponentcontributionrate;X()
3、:最优参考丿于歹ij；Theoptimalreferencesequenee;(:两级最人差；twoLevelmaximumdiffereneeA(min):两级最小差；Twolevelsmallestdifference;:关联度；Correlationdegree;E1:综合评价系数；Comprehensiveevaluationcoefficient;£:隶属度系数；Membershipdegreecoefficient;C；:第i个评价因子污染强度最人的超标值(以”级准则值为界)；thelargestpollutionexceedin
4、gthestandardsvalueoftheithevaluationfactorintensity(pgradecriterionvalueforthesector);Sjp:第「个评价因子〃级准则限值；TheithevaluationfactorintensityofPgradecriterionlimit;:超标因子个数;ThenumberofExceedthestandardfactors;兀：评价因子总数，当厂=0时，取*0；Thetotalnumberofevaluationfactor,whenr=0,£=0;色：塔区C,与S
5、]之间的相对距离；TherelativedistancebetweentheC,and99Or.各级标准隶属度向量Sj与S
6、之间的相对距离。TherelativedistaneebetweenlevelsofstandardmembershipvectorSjnandS]・A.样品采集点的分布与分析thedistributionandanalysisofthesamplepatch我们使用Excel工具对319个取样点按照其所在位置与所属功能区，画出该城区取样点的分布图，同时可以的确定该城区五个功能区的规划情况，以便于(inordertofa
7、cilitate)我后面进行相关分析。WeusetheExceltoolfor319samplingpointsaccordingtoitslocationandthefunctionalarea,drawthedistributionmapofthecityofsamplingpoints,andcandeterminetheplanningofthecityfivefunctionalareas,thecorrelationanalysisforme.同时使用反距离加权插值法，并用Mathematica软件画出城区海拔等高线(白色线圈16
8、0,渐变20,如图2所示)及地势图(图3),规定Y轴正方向为正北,如图所示：Atthesametime,usingtheinversedistaneeweightedinterpolationmethod,anduseMathematicasoftwaretodrawthecityelevationcontours(whitecoil160,gradient20,asshowninFigure2)andreliefmap(Figure3),providespositivedirectionofYaxiswasduenorth,asshowni
9、nfigure.:结合图1、图2和图3可以看出该城区的东北部分多为山区，地势较高，海拔在60米至160米之间，中部海拔较低，在20至60米范围内，这里多为生活区及交
