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: '91357d87789887a8',cH: 'socbYPMa40v7Puww4.K0267PVt385VOYIjuzJsRTlZA-1739792298-1.2.1.1-G3Bz4uCf2.zSbFJ7DGVsFI6Kjept2Zs6EMPdxo_eWlGfR8eaNRFPRUMQXH.gq5rA',cUPMDTk: "\/abstracts\/search?q=Yilun%20Xu&__cf_chl_tk=W3iDP3Z6w5scvHhr562FVFgvyaec3S9QwZw7ztXrlSY-1739792298-1.0.1.1-JuTV.nkk7S4o2EmQJbSJYDrA_KK94E_9IbtiVw0PZNM",cFPWv: 'b',cITimeS: '1739792298',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=Yilun%20Xu&__cf_chl_f_tk=W3iDP3Z6w5scvHhr562FVFgvyaec3S9QwZw7ztXrlSY-1739792298-1.0.1.1-JuTV.nkk7S4o2EmQJbSJYDrA_KK94E_9IbtiVw0PZNM",md: "DAgL4v6mJHgg7A8cB2mhQ8neL.Rofa2IEyzUjqbiWJc-1739792298-1.2.1.1-VTmVO_7z6qgaYpnf0GPMcLDs7Kmqt49lOsiivNEhSiguDxyNb9bmgEUJnDS49xM8SFkzA8c4t0qdvYaYetM7qicXRjslNzXqbMUHRdr4mLKuBcKrAZzjomKyOlVX9ENjh1mzTTwtDuEswCryAo4SYp9In9JvoJwC1ts2b76gtGGGq85CRPXJa10NpPE0LoSunxLNuFGCaytAjVqgyC_cyP55LuhBhqggExtwjCcmMw1A1XGNBaaRw2Ug4rl0Et7lZrsIgYt7a6R9UCKLJAq5WDSnsszS5zqFDsX3ZYap6Q.TGTcHc5Hgcgy80nzGzB16T9ko7zpPp3EtaVhO2TaZAiagzlB46eFmgPy3tUYCvnZJNoep1LXMpB98DvFe9OwtcOfQZgtXhaC66f4ePxRR.b02ktI3t0nJc0XhIv6sb4hS6AvE3cmnfCh5AG793l9LC2if11X2V.QNxroPkc.rSG.7TeWClX9akK4cnnHcRGcmJx1otmxr8HWwuN3u687xrz1jR65pvC_DqEblnEL3YEQ52TcN_XneqM41iR.uyOn3zkt2BXkzm3uh9YzR_HntW3Jdg6Em9GhLq.DXAK67fgJp7DflRGVchMnLbR31zjkm6M8IIY9POImMMfdBNOthfZwz0j038nrx97wT0HZs7fuK66pnOrSlDIxVnTT7gqWA4CES5qiI6gj9A8N0.o9cAvNTQxScOJAERvZerBArNVUDcb1S8yCnzObYHu.hwKGkt7XRMbcVX_30GEge2jBcb42DnFfo9WvUuQUMtptNuxCi71PvbcLlqcJp_nU4RAgcYd_B7WATN0zZ0hExvVets8JWmXl0zoPGAbLrHA7wpjO1MxShvHtiUtaSqA_kXJZ0SfpUGdoahW0K2ORjITLvN9qBUAfAwJYTBif0lvoGxhz0h_thIkgLE2onzBNfSIMJMWpw9JYKo5ioepHWHTcz6uyyo.77frjt9xvdOWZ99qIW1ZOtlxCjXrszr1qvqDdYsgzmuPPalUoAsiavZSrCpsYM7NKJ1RXn146VJXSo5FX2E0QNVCAqiBym0yZ1Tw.5Kx57Njdi_bHlf1Z0yyn14SHjy5.7JYspq620Jr07ZH27kdCDFSry_1CY7u6QGsdS0V9ScFsUKs4YiaHReIw4m6z3v2QJ2VCyPPUzWy8FE3A_PkpUrgqKIPiNC_h7vuRpHhkz.T_9Gi0.MeCleeDRrpSM4RA27PcjC_Sa6EzEm54U._3j3keLAPvjPCZKm6kZv4UUsSKl.i_I1Zq7Gk4VcyodVZjaM9swOFifMbZI4J9G.Bd4fo1851wsS2sM5mWyEX.sxiL.PHSVy67UecmY1nUEzaCt6xUM24pZeJ2ov8Z_4yDxY6OaLjsQ3qMDHyZLHftWvAB4YjKC_ZSpHs5RMZ7fCvHNUKATGIidwONxycHJjzYYSLusuIbVMEuEpNHnknnd7cooqwJ8Kfk5LbBxCW_HVEwzBiZ8fdjqyoLit8Ga4K.Z69Exj8N3HWhDVamngciViJCLChgvBHb9zDqMBPiNVSOqTu_VEd_oJoWZi_6N62s347VZXo_jWuc9zu5czSWPAyjuHGwpHD0.uHFQmmOJ7nNkJ1RfWheKH.ZnBhCKciykhtxPkZJt64o4oDP9wDVwnIv9WU1YeNsDV8gtEWiNDiHRDbJw3vF6zZxIp8n_a7h_hyVDCkYPy7OWc7N6_KRmAiiKIV5fKS5ctfdbRJQBG_NSYwL9CwHcTverkDwq.UvRQJ01QsvuWqOyVOZmSRJJkPJVB4KtfdJwHHYrXab7fg5PTRbsT6s4NU3Ki1nioRSD_T0JFf9SCFwtQwbVExcMw6dLNVMVZutCUJVO2vsceidYDQq3LLKaKV1spsDgPKnETrPLrme178Xk7OoqVHCdVwsW5th1tfjC1sZZGUWjlzJtKbNCX9XEZ99MQg",mdrd: "F.8njia12zGJOaYZsC6lub0Uuu2.uxR9P1Bkv7X4jnM-1739792298-1.2.1.1-_MVG2yPdy8IJghZ1zRjg3VrjLVQyisO8u0b0G1xVJyLz9QPD_TqmuFzskKhoDQbqTFrWzAfedlH_TrKNaaT6jN4voBTAY8PHloGD_V7RvTkW2THrLPMbYCa5xCjklby8uZVlTA0MxMwSGtrc40nBJD.sEZtOezs9KO.t9PzZ3j025APgVfo.Dd9GaGs_yqf0d8uoetuEAq_8.pdKzEAk2WuXz558SqjSxpF7imZDwGke12mHd8rf66uQhmCHw7tBf0GS67PXK4cMVmW2toI9riMRHi1ysmz67s9fWK2WhQD75UrInsWaJapzZtcGSnGXhzDFj6IiEP_TzHOem2nOD9L3YIRBJKGMbw8vROaoe8I0.Fc1r7mwCMJf8LvMrrdQut9KdNS9ThJ83A_h9YDke0RXAElCVTfGyRBQwL.Y8xtpPVl.ZbYckMqAcHb1FZMFNvpH.chHxUSQOi.61m.d1C3dqvWQbVHecqwTA8oKO5tuqVqHpy0Ey0lXw1ZURp9dW0fyRANvp.8MbGpne7OVvJ3gbOCfek.VPXCLZpZaJ9dUTc.zCOSa1mfOQB76kZpnLce02jdta..NDnR3Z3RLp7P5ThUbZCvJJrJ4_aVO2yVh4xx.5A_QVW1Fvo5EwnnkmmwMSrcnDLbpjCQe9l8Yua7lbNpVJrDmfAxKnxDjp.Q01lxWnPknUsio5GZXOw_IW3.gCdR0Sb9LD7zpd1phNPu1XOACRq_s4qNwnEtXJGuUaMgaUhth3WYBFrs3obIwGzshkwSWDnqxrBU1oq7h2rqZS_fXSBNSA9oKtgCjn_D_tQNj.RB7krn8_w5zbmGz22iPlc0b8W_Z_YIMK62p._mmsTPlxNZDqSYTBDw51d0IyJTLHIhRPRg3LkOGRGkPbUSgoabLR7oA4SRvDbwHTNgfcSiAoEJRzWl2ZwL7p81OwsTuau8NS8rDr7ExFfF0SjNnSwHvSlJXxjMtn92oi.qzNWPVe8NtzRvxr2JmpQWQ8SQ0Tavxkqyajp7gzpO2gKBSVSZH_1Axtah1hVikjgFn0NCWk0SJHfwIrhdMSxi9HnQ2JA7VEZLQnyaKyalNtv6CRIGw44U5oJFx5xz3TCrz9rURRyCN5My4xfeQBWa4ayLBNXdDbQJah_.zkjVAfWe6rYQA53vm_99bf6wUoOHE._9s0wohY2d7WLsov4Sq0DvaHoQ7czwz7CYDAoWNGrcY_jJ7Q.seG6N2XPu1oq5vxFKoSz9d.3.qhsLhipds2cCrhkdBsVSqVDCwinwICHZqTPDXq_czInBi8sL3qAhnUVvdd7.gu3YUo82AsYTdylpCL0oAKY.6SMMXE8KSOPO_2.6Y3WbX6IKJUL90245WHWznIX0m._wkgKRtk_lCz6ZrCpPC8vejgQKC3KTxYLcwsrJFcMiYliDu6agVt1OVhrM8zLn1lSsTcdx2jQ0aH4N.c_6jVG9jlVTIKNeLlSddUq9QpLZgwiDkCOh3H0DaiQru3ABfUwkt670yzl078kgv8vBtDDAobEmcz6IoBa.3OWsfItuak62W.iaP6As8tIwaGCwrjwMl_3basxZFfhCdspvzQ7BbKc35cQSBq4DLMHtJ2tydIJTg4YbuYH.dXksXCD2_9962Ga2CAQZmR0BpGEEMnJzF6174fP4fTgXjGVTblF9mk9RqjNnmpbDRQROlSa8y54t2W6bMTNUF397ypeF1wL2krXS5EQhaGMxKzqsq_jojtrYhQzzLb869CnA3rMZYTRAaVyD.as4Biy9_Gyu_g5Y5nAP.hTBoO161ygsXY4X6RVl5_nl2iWwgzPiXS6ehonlj770hBBgGqjNVekuSlVaYsIx5K.dscvxLnfl0yX_L6.ewiJ176McG3uBN4ATBlUAkWCh5giNdr0ZkA.xlSjfriaLEONGr4eaoWpkkzeNv445iMD_6NxWJ9OwHuhmaKc_hSWjY5lS674WMLwIw2JgSi7zUf3Qs"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91357d87789887a8';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=Yilun%20Xu&__cf_chl_rt_tk=W3iDP3Z6w5scvHhr562FVFgvyaec3S9QwZw7ztXrlSY-1739792298-1.0.1.1-JuTV.nkk7S4o2EmQJbSJYDrA_KK94E_9IbtiVw0PZNM" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>