CINXE.COM

<!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: '9134a8359fcff938',cH: 'ZUU1GXR5PyqQvL0jkxzOxwPtlaw7UliQ8L85uyoKziw-1739783560-1.2.1.1-MTfFGOB64D9EKejK7MbLa5rMM2ibdexJ51D8trFRbuqUGOjNmc5sPlGeqd_SwwdC',cUPMDTk: "\/search?q=Uncertainty%20set&__cf_chl_tk=Zv6kh.Ofxt.RmQfP6R_PhTguLTmVJ_X4b9dHZ0Ieags-1739783560-1.0.1.1-uqwF09rvnsA_AyVn0DlXDDaGeF5qY6gdfOFkhqf8jBY",cFPWv: 'b',cITimeS: '1739783560',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/search?q=Uncertainty%20set&__cf_chl_f_tk=Zv6kh.Ofxt.RmQfP6R_PhTguLTmVJ_X4b9dHZ0Ieags-1739783560-1.0.1.1-uqwF09rvnsA_AyVn0DlXDDaGeF5qY6gdfOFkhqf8jBY",md: "yJSmVE6Mm.XYvTNLmKs9mm6fF7mzhiQbmDsWDqNwgaI-1739783560-1.2.1.1-GQtwEQDk40lc3SDOhSBVwsGjPkqGK5BhpE5u7yrN6Ydi_BM1VqCldkS2NuTmTJSWqxnJrfq9uHl2X4xExOtKNBFeSFV0uTtohFAQaqjUc7CjGVo2SAWMKbYrdZukQZq.xy_AkXsvgSlzJfHwUVaNRMo19fzdUTcGX6aGIlyQHSFLbvtbE0MVNOuyuFNZMJlKkKyXWXCrQcQ4_FsyASNkbnIwEnBWIC7pgO1BlaHZ_6VCbtbC8TcZsqMKUERubZ.SEULhDRKWrM6Jx7DwB75cjbgX45Mb8WghYC7DjQG2SMkukMUHgTu95FScvNQRJC4_NMDI7t5OCP54IjhN5lZRMl5Cslf.bhvGq7kDNWpOMAeUYHfj_8auCNy.teW6GODzf2si6YYCKRyJWj9g9JEovzWBRxHyK3DYU5bkUceANmi0I1O4sM_JYQQVDVPZ2lJ_ZyownBgeaCO3HOGDM13n98YakIcftIfU5.Ppf_yjMfB6LQ9cx0VjfcBGzLWXZixNGM4WZ4bkbHCHNw7_AvzhiiLXewLOw1Od65NpGkJziVo4IAf8jIczK3hM1FGx7RmoDi_PxkVon9ZNsJZt6RAdwdWYj9MlhxK90jzkEgxpkRkTqqRjm5LmT1cfatpht6kf7zJwgZD1l4RnUNokPhizsWZdem3lXfuPaEOb1Nw_lHnDTc8dyeJXkbV4gzJrfBvulfUOqzhfbX8p_kFzcYQ_16GOkaak_iy1TveKmxuxlYSIgMEENqhjCVivjxzaYOSldV0l6Z8eCdm1UPsGTWiUB_biK2ln8B25ZyVF7a_QdF667tn8Jdwjbc6nTNMVDe5eYfpa2QKqyWQqboFLh9IJQK3k2F9KaTRgKqAt3VmlhnvBzcY9_5DXp3aUedktWkW8wjTGiy3kpTJfDWbFOg2LM8cVKjfmkNdExj5oI_3i5H5vekLk_w04RTaRyN4jV30JMArEEw0Y8_0Xxp2w5QKlir6buUaIdriX7YU2LTgdKvKZyGJtwb1GaUdJ5YKjAP_EBoyh6W87_4hIXnDTI2fu0ntiTVHhV_oBPkenobQY0OwHpphCFjFoVnUZbUbIoyFEd9J51r2ScT4qutWKh2.VnWAURM5cJlD6jW7ImE87IckWyG73wfoGlpwwmHZsjb0iBVPRC4Qx07xroj5BFIOZzwhgwaLMZaDBr_HIGxVReBavXjKRbxnIP8afo63o4G6.llnnph0I8qbbTn35lEy0P2ZbGu6xGBD4O5H6LxQXTc8Ix6LGBXZ4n7xr3aqTJ_.HQeT65Owr82_ErMLa8_rfBjbhZZ_SdInPr7ip0CqJs1okC7ry93gAyFwAuhyPRqDoceY68kfVXYvLYKBMpFlBRnXEvT5UGUPURSQY.GFRINmW684d3YoNNcCuJJJoYH4fk4Lbf857uI2SVncDqaHuUGENswr9bC_s5.g16KAZKRhNcTCw2cZwh8IPJ9cVmutQmTfgXlPWHIO3b5UDUfUq4KAfHnAa8yeasZgiZbr4YYWwOgiCukezrzGGa03wD2yRkXPHPs2rOx.4L3gNMpxssSBxra4owSNPZYdapmJf.i_mFac8gK55sY71ApDSeXKtyTdJiAwHpvYCFtSLIoQEI1WDKcanXQngnwpQmEQSCFuwrBJ6WpPm8Il51qHFHBto7ALJtsK0iGExAFaN2DILrFcCzu53QzWlVmGsrz8WQ597fFmcMCMgdPlZu008mdsBL0N9t9my1BM6XRwdlXq_Ge8Umk7ShYKZApNcfE2TBZW1JuFPzdrOBFWWdsR590vm6Uze5cpsfuwqoGYCz39yR6lvKSUvQSYvkaiWKb0dentRtuKL87p3_ICvgVvvfPIxDgjCYAPE3lRUSpXR0ZtrSeANtGciZTBZHpLaVT4bC.T1TOENXJSvexeKnnq.lB5WYqVWwhhCi6aML_zN5k.LCw",mdrd: ".nVHrOPhECCzqdd_YY2cdWC6GQ5YNctzrOPtfyiU5Po-1739783560-1.2.1.1-J1nMe8WLCEMcJFRovQQ4EjN_nqeMNxbn.42zOeZip9lqsTiRRh7HCira4tBjHSNNd3ymGTkxX7DXIeedVja4qLFd93mIl54AJx1T8dr5X2HbtpUHbf4gewl__Uqnpi6FVmCVFsSa.pL2JaNH5DPg.2sVOEM7cX9A169ESl5WhqVZi0ZXVExm9rl1HZkpo4TjmQ.5FhXc0HnzFbAP2vjHoDrfsU5JDT7Ks37h1ZCPXesa7O1lkqXGoOiqMDoExs5vm1EaMTb4EBVdGa4dPvi9gcP.W5FWAjS8KgBMKVoRHWU4RVBBkry5KTm4Pkf5rUXqJscUQLApvzev7LPVuxuMRPp_m2GlqFI9VpsEYgl8KxPJIbv19yCoAEkpvz1YWsB.0NhvcsYmOW9p82JZXRtgIMZ9uTR.6Mn4LAU76A2lisIaxQHxR3hBZ8ysnwHw1Q3v2znWae6EyPSI1sQ0Ah4AblTdo884hkaIOuz1qKWU4b1x_a_CEZO.vyKDSwJ1IuI.hwLNYJLT8kKo7zB2nZGWhNtoTBTcn6sRYrTyxMMVE7SB_Q7G_PxXhtjkWK3cFWbfcsKcg58QZYAb_6xqkJQ4DFDLKhja52jOmBHcyINERQ4mO0hLfG1Js4UQpsbShNlI4GKPgXPzV2DAeJLyjNBEEa8f7GAXc5HPGXr0ZKXtPRGEsz0yBGTN9edp6kUnqw1slGFT8mAbH07ByC1JVlrB7cHeRc8_sqILDvxD8kWlyZVy8EU8fMHQ6fc5Drkb19HfT3rNJ8aD6y8EHiqQGBPqWAW1YHkKuXs6giJbCwLySMeZb_sTKnu2R9oygP.QYT2fVdiRVwkgCxc6Up83Rbx9MFK7aDxy_biP1YD5R1crQiQoOvfT.MpycJlQeOD2LKCMJ1WHwvTlsv.BYvSd3x9wuxk_TJIg.vpeNvdpcJeCx03Djd4N4qdHqq1J9TXahm9Il2IsidAYPZXuZYveAe.6zkU2Z_Er2RUK25WtD5H5_AK7x1oso6_2haTlj5PWPz8_t73X3ogWW.V50OOYIPfWVbt4Xjaz9GuFAxSpXENd5CkMFUb7zr_cdQFLWvEyCdrlP_XbFFFZl1bwF.NSX41zt34Y8..05j.3yffZChJix16SM6RVFGle02Smr8e9AoSIzuItCl7a.OQZpeGSKLFMFGq9cpEHYqStz5rugvpDDyKQGAQg7XxTeQ0e2wnIpNDNj_6ZWok56yQWo2nXDPjsGug8R_2o3KMKm.DY4HbJdY0IBgVWTBgC2BqBRF4R3vutmA9EQ0Zf2SndyYtqnWLVp_4Ra9g.0IGMbg9h157Bm59ow7RAWyS1wfQk74WkxwcJCp4El1GQSepZehy_aV1onrC9eX_9kusU3rLPW1Ei5E4aUSydwbVYjYZeK2p.KcVy4xAqNZZqaRUMco9PSXbUR8R9CVT3xgzR72I9MbJvTFWJH_o1z_4EO9TMSVbRtIcR0FcviS2rEfJ9dyjEAR51Yp7k7JDrB.kUQbvf5LUCfA_Oo9RgZO0bUQ3ziGxAggh_1tMR2Vm1AkbQEQsxo7BjWcEEEiZa16_6LXSzVia2_YxZH2kAPpTlpDnCi8duHPwUyrPkZNIoxD0Ervy7UcoYrD9TDGShE.JjcwGEvdr.t1tv_hicHz7FUTONrxTKICbt2wtO.PhzII1PXxbYGwryWhDyUcZcA9UxmrgCMwczTcMWEzZnuW0TO0TMxZV.25ts3mNpeIFmohv_v52XRBGsjl_eLoDJmrXJJNUle9xrLphkK3vVGuZyQKhKJZ17ekPbn6BvKYhAYnSFj4gIAOEFbgXiIRoNUaDRH1iRdNlRhIu29UFjWhZpGB4prH_FpHLSeJYq_5PmwlGKMyHcuxVliXYRkzYP2IYOLNtLo1oL5pPGn1di4PlD6pjf1CRMVf9ZHEN3X6EG6rMls4gXHTjz_Iv97zaM.FEx.rXOeSRZcQL5j_CB15F4icTCH6Mabf9J9P864q7e6Ncj7Ds7wZJ_yA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9134a8359fcff938';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, "\/search?q=Uncertainty%20set&__cf_chl_rt_tk=Zv6kh.Ofxt.RmQfP6R_PhTguLTmVJ_X4b9dHZ0Ieags-1739783560-1.0.1.1-uqwF09rvnsA_AyVn0DlXDDaGeF5qY6gdfOFkhqf8jBY" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>