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進口AS136模具鋼材一般熱處理多少硬度

    進口AS136模具鋼材一般熱處理多少硬度

  模具鋼在購買的時候,大家會發(fā)現(xiàn)價格并不統(tǒng)一和固定,有的地方會高一點,而有的則可能要便宜一些,但實際報價還是要看廠家與產(chǎn)品質(zhì)量,畢竟貪小便宜購買到劣質(zhì)模具鋼結(jié)果往往是得不償失的,建議大家在實際購買的時候,一定要嚴格按照相關(guān)的標準去買,并到專業(yè)而正規(guī)的廠家去購買。NCLHome>

  Documentation>

  Generalappliedmath,

  Statistics

  Performsk-meansclusteringviatheHartiganandWongAS-136algorithm.

  Availableinversion6.3.0andlater.

  functionkmeans_as136(

  x:numeric,;floatordouble

  k[1]:integer,

  opt[1]:logical

  return_val:floatordouble

  Thereturnarray(say),clcnter,willcontainthecluster

  centers.Itwillbedimensioned(k,N),whereN

  collectivelyrepresentsthe'variable'dimension(s).

  clcnterwillhavethefollowingattributesassociatedwithit:

  id-aone-dimensionalintegerarrayof

  sizeMindicatingtheclustertowhicheachobservationis

  assigned.

  npts-aone-dimensionalintegerarrayof

  sizekcontainingthenumberofpointsineachcluster.

  ss2-aone-dimensionaldoublearrayof

  sizekcontainingthewithin-clustersumofsquares.

  K-meansisacentroid-basedclustermethod.

  Theobservationsareallocatedtokclustersinsuchawaythatthe

  within-clustersumofsquaresisminimized.K-meansclusteringrequiresthat

  thenumberofclusterstobeextractedbespecifiedinadvance.

  Asnotedby

  "Thenumberofclustersshouldmatchthedata.Anincorrectchoiceofthenumberofclusterswillinvalidatethewholeprocess.AnempiricalwaytofindthebestnumberofclustersistotryK-meansclusteringwithdifferentnumberofclustersandmeasuretheresultingsumofsquares."

  Thek-meansalgorithmworksreasonablywellwhenthedatafitstheclustermodel:

  Thenumberofclustersis'consistent'withthedata.

  Thedatapointswithinaclusterarecenteredaroundthatcluster

  Thespread/varianceoftheclustersissimilar,ieeachdatapointbelongstotheclosestcluster

  Limitations:K-meansmayhaveproblemswhenclustersareofverydifferingsizes;

  outliersarepresent;oremptyclustersexist.

  TheoriginalcodeiscreatedforCartesiangrids.Iftheapplicationrequiresusinggridpoints

  orstationslocatedathighlatitudes,itissuggestedthat

  css2cbeused

  tointerpolatetoCartesiancoordinates.Thesebetterreflectthetruedistancesandshouldbeinputtothefunction.

  Themodifiedcodeusedbythisfunctionwasdownloadedfrom

  JohnBurkardt'swebsite.

  TheoriginalHartigan&WongFortrancodewasfrom:

  JohnHartigan,ManchekWong進口AS136模具鋼材,

  AlgorithmAS136:

  AK-MeansClusteringAlgorithm,

  AppliedStatistics,

  Volume28,Number1,1979,pages100-108.

  Example1:Thesourceofthisexampleis

  Defaultoptionsareused.

  v0(/1.0,1.5,3.0,5.0,3.5,4.5,3.5/);1stvariable

  v1(/1.0,2.0,4.0,7.0,5.0,5.0,4.5/);2ndvariable

  mdimsizes(v1);#observations

  n2;#variables

  k2;#clusters(userspecified)

  xnew((/n,m/),typeof(v1),"No_FillValue")

  x(0,:)v0

  x(1,:)v1

  clcntrkmeans_as136(x,k,False);usedefaultoptions

  print(clcntr);(1.25,1.5)and(3.9進口AS136模具鋼材,5.1)

  Aneditedversionoftheoutputfollows:

  Variable:clcntr

  Type:float

  TotalSize:16bytes

  4values

  NumberofDimensions:2

  Dimensionsandsizes:[2]x[2](kcX(:,{-30:30},:);x(time,lat,lon)

  ;reorderviaNCL'snameddimensionreordering

  xrx(lat|:,lon|:,time|:);make'time'(observations;M)therightmostdimension

  ;thelat,lonarethe'variables'(N)

  k3;#clusters(userspecified)

  optTrue

  opt@iseed1

  clcntrkmeans_as136(xr,k,opt);inputthereorderedarray

  :;clcntr(3,nlat,mlon)

  delete(xr);deleteifnolongerneeded(notnecessary)蘇州東锜公司的戰(zhàn)略合作伙伴,法國ERASTEEL鋼廠是全球粉末高速鋼的研發(fā)者、粉末冶煉技術(shù)的贏領(lǐng)者、ASP品牌的創(chuàng)造者;塑膠及壓鑄鋼材合作伙伴,德國葛利茲鋼廠,成立于1779年,在全球擁有龐大的銷售網(wǎng)絡(luò)和過硬的技術(shù)力量,鍛造能力強,處于行業(yè)贏領(lǐng)地位。

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