CINXE.COM
Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="120"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "publications.waset.org",cType: 'non-interactive',cRay: '91342833cbfb5c33',cH: 'str6y9Zyoazda5t7vwodnsS4D85U6toHw6eaowCFZSQ-1739778317-1.2.1.1-E4drhFfd7ninLtgvq9Xvi5JDHE5kh3bbAVUOkgKqxobpLcVUKPRMJB97Nyj2k98y',cUPMDTk: "\/abstracts\/search?q=principal%20component&__cf_chl_tk=DrrWaRpZL1uW3ASw4A_MRuYFPR.sR5dDchrun_yV48Y-1739778317-1.0.1.1-pnWEVS5Vi1NpL4T.OVNCim1svlLW0wFfCpYaoyOnTSs",cFPWv: 'b',cITimeS: '1739778317',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=principal%20component&__cf_chl_f_tk=DrrWaRpZL1uW3ASw4A_MRuYFPR.sR5dDchrun_yV48Y-1739778317-1.0.1.1-pnWEVS5Vi1NpL4T.OVNCim1svlLW0wFfCpYaoyOnTSs",md: "aPAnBGO9TpmtOoF.b..wi9oNhLhxFoWvH6S6IUzEy2w-1739778317-1.2.1.1-DHtsxgB8nah51uqpemxEzqhip.IoIxvNEiiPk3X7NccckANwJqlad91MFBRJUK56cbdqrXtVOZO6SRquss5hoq_UtvpZ1AHhuuzv1S16QGyzyVsyLZl_QsJWCguNzuKG1u4NeRfg64SOEroPZpyZpTW9V7z93FMW1CUmJuxS8NxlQxz9_YLJI3_CWeqmfl4lsssA.pCL00SqwlC18uP4iecfN5Qf4xfc7B0oNpxjOZXiE1JxqX75SapOH39WXt5Otu61N2rULtlX0l72soKp8C1uLRg5x2VI1NGaaGOAVCCOMhrylM6bDaRJnsVqGNxeK4dwQAb9FJDu2Vhotsei17mHFFSezoTwztY6V3Smd9mJmEJfb9HzRtyojNLegMTPnY6j38Lc_KAF_avF48Czt1P.LkZYBAgL19aPp_QtR1Pxm1fDdlyEFbmn9LCY3hvjNzzdodpt1n40wgcGgB8nINtEwJRGm0PJo_.JZiKcAIpv9VE0JtpRSp0as4IwQkwMyFlQdP7T9NZOPJ3xt8kWzrw8AYPh3P1VEPCzpooXunaX6rMjA1bJiKDnDByuwv88soqXe7HzkCwZ7oJeBPYCn2TQw6UDbjsXNcqo84OLUWkHLcEMmOi1Pvnb7garQF28zc5kci3VZdGboStmVHwq4k_m3R5a01c6QiJiIVVf3NuXfL2jJ0h6uRCl9r4l9GhYQZqdCSAVQa_3ApHi8ASg3JmrfR2o96SKlqTYQ5.NQGeERDE_BvA2QoWMqt.GpW7dafN1YvlHFaxhGM9MkhgGCYlPu8pB1n_Gfu7nZB4VuZ_e9LVhHh35iz1pjEEs9Di9KVNuXHEAc99b6t0t5nBDRUXjbmanfYVl4phnqxU2Fm.54biDg5Y0itlEY8B6GwzqlEijYY29CzmoxrJMLr6Mj_Tc6JvxNF3YWNNHFSt6dW7qZxQtJ0_v73yBK_GP6aoP4ahtLq6rBbioGbi3JD0leWvjA3lhr.Vid5hbHG7dKr2R8wbkIwxQDoUydbFvP8tRYYaAPC_SZxNajgltF8X_hrGlqNnz3xbCn_2S8SF84U2RohVLvqHK21hcOrSpspcCCZ8gn02m9tikLo0MaMeLtTPtBLiTlmrlk.mwzvM1O4N0hXPyQ6S3GErkhJSKkvrNwFm84vndUg5x3e0NW4irwgN6bzObyNkrr8T7K5TrOvX5TiQJdjLzkdr17h7G9A5xhVq95Xme8GSda.KKQOx8xnJpbpwIYaqh0qS7WWSbOoSG2T7Rj_LO4iEkTH21CRe8sTnZPkEkwVKuLgSZyh4an0rggL51fDsCCDYQEVkPLf8KKXTCxrTKtAtBqq0nWlfIBPwJSQJkQ12qAAr5T9VFXcKq7SW112tGyC2jMTjS6qHpttnMMmxSZGwJuzdVxqaqOUmQqJoNopSBsGbh0nugfMlcU5MZkd6_2qoD9VrVIAQAlkWyHboejtrpYZiUg6TnYiU5q4qv4bYpH1JsUVE3VyRj0caCPNtALqCiZ7rszwAxyDcJ1Ktq.Z3ZYRiB6fQVg79ixXgJoN5mDz1weLt_DTD2IPLiI7rmAniVZiuHgxJUxuTOcsMEA9U9oAZZiz29XXdyfKVFlS07tcm8lRf7blLULUE6vEPHFen0C02wJVx5JBZaZX8AOJDRMwTpSIiDWVDLyATWeIfd7YJLysAL3yN_V584Sx_XQJG_u25MeFXu0BsjrPlujT4tjQi1DRF0q80uH9.2yqnTLfe4hTg3ihmhJDmoVVLzo1PIryrpzHl_1.ZiOuUxlzRI0CfWDjbpPN8.KQZ8JG8DjnlfkcAhHU6FgAy1CKrjqI05ml0_mpK5iVat4Y5Jjrc9hwjZQL7Di9rqLBYareisDvAO1XbFAnMRRgOpuoC7zceuGvOlxFfjcY1F1oMxnoBeGqf4FTtJ9Kc9OszTSqKHTrVVqrVhi1E_TtxeQdltQB4cR2pgX8DD9MPQfqXa2OfDp3CTP66V",mdrd: "55bsLvQe2RrFUw30Ottsv7xCuUXmXmAcluG0qMlyRlo-1739778317-1.2.1.1-ZVQnUX_HHIaLsMNyJ7Erelwg1xFjY5fAhuW6H8Jkj3B8j4YcNhJcaqm1rRGfZp8YLGzOD9M53y8Aon2f79rb.af4ctsJp6oG99JfHSZWdMV72T36UkPBbtLnkaClm8jipa9aK39HLm5pps7BO_qjLJwCSUBaZXdhK4AWBFGSfWGb6TaKCi_.2CTuo60S.fHqhpM2GxR5J3lSIo5tXRnBHNuEnyq4XZBukfY9V6O5wUFitGbDUr_TQCfwBTEcRCWXOrwuxj.SF5Z53_C0z5t7lzF2wlhUEMr8_om7Q.uAXCFsIzayfNTBkq0kffxQ.P.TDm3o8TOsrc4BNlCjlnwNpeTw6dHJmpH5YoQlegk3JprUdA5w8pSUPYZSCll4nF56OD3E6SG4ce0Ra2ptcPdABrEkVRfWW1m7O8f90rbS3imq6Xneg8byBGMFaHU60RtrAcTjR1BU3zYjlZZZP08stUUX8AulGYhMWhnvFQPz.3f0RrOLp4W0aq6fb4YMIxP9Hoc9u3Jm9gBRJtR84RaG8snIjltEJAZ27hapSIsCMeIBoFsdo8vzIjUUbY5vC6yDGyrHIiFci1r9.sb6cMtwFFHIkwaphjbPr6zri6BCljhFMT8FEFBrbatarJMnkG9CCnWJD2L.z7f1kiOmy5gttPg9DKPpXyZPpVsKRfejrSTA5BAc0xEspD0CsJ8LK9vsc4ki3DLQ8XotnsOdZ8VXcMBaUNYQ826ALi2BSfwtwNfNfNFpxSoDo2FPRhOsZQey0zkLQtygRm1twG77DrI32OUEfwluUDeJ2NFh7H2Dvjlz.DH1rPo8I29ZQR4jVq8fvXFylpZxA2qt116GPcHXYXn7m8FCqTgJTsY_uTpRJd99Lk.VWheLe6TMBpOqPj4UDf.q81Q_v8ZuXb8x7L3tG5OtLyVEeO4a6DiJ.Hy6VoAS_3ecyeWtGJid1I.pzxqqROFFOVobIW0FILKC8dsPN52laeYaA50YsaN3HyHgLCotyQo_VzIQKRfidnsqhqnM13LbT3zOA7SoSZrYD2q6NuiPESjDU0atBmK6gPvIF91iqVzsZ.tVjIm0SJmAHXs9cAPZjhttuVERqmupMM3lVhYtl.I8Z4gcq2QRGJm8hzAq.DU8h3d4Q8ph10QOauXMVcsRtmRyRxqAwgqRxhvOxCToa64lLV1PbFvjaiQQinIvMzdVgPggEf2iaaCxPcEhAF6NPuQPS2hmQO6ePPbd8MKa6JVHG_tqJQ.xl9bcT6GndwoQvKQTWT64_ZYTgvlA5Jmf7N1de.y4Mcd9bJzUvBJhDjKI6dEqpCcwFkbQukV1z36vnmTJdzO_BaL4vFu2jnu7mYIxP1B8Hu7Kw8C6cSDKxzROVtZ1y0do7UbwhdOKH6fNTjD40wLpP1gWNiYr93Xc6AAzMSZeT7x956i1lG2NfN8hSoYfIIHkm9ssLJ9SwZQMPD3K._5F7bKEOgCxVrMBjlCsKcylu_Uo3avGasR0GgFaFkm5.V.ClKHnfD4.dzFQ5UxzG3wRtz.6I3EKJVyVtv86xtkw01eX.tVCdPRrZlMuMcLCxaOvRhUu5jQG5x.BwuZvtY5T_CZ8cfCxXLoMlZqvZxIix9KYpdtv9LWsMMF0Eqm4EDzRNtH9hrOSmPbTsxHGj.8dSNRvYwFbMJHcEKZ24QPDI.trVPgu6MyynouCdi8MmKhbkJuBzNZs_Y46J9n4jOHDhPnBhxh7v6k0gn3T.jU13XY8N2o.AZztPoIwwklwVl6yhu6m1qq5c4By9SpXqYFXzJPTBe0FASfc9sx8NEjdQe14FV5rpkmnMM7DUPnTY9mhvlrndUE2MSy3ze06il9LWbdK0EBW9p55ZE65n7hXUUW2mAOOE7yqqAoOZOshORSwisvQzVMpzamPAUIMFeA3GA7SrRBe4k6zgEOt83aC1x09Hlv4mBZ0jhwsxFYIiOTtK6bAT54"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91342833cbfb5c33';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/abstracts\/search?q=principal%20component&__cf_chl_rt_tk=DrrWaRpZL1uW3ASw4A_MRuYFPR.sR5dDchrun_yV48Y-1739778317-1.0.1.1-pnWEVS5Vi1NpL4T.OVNCim1svlLW0wFfCpYaoyOnTSs" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>