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: '913633847d87fd37',cH: 'hZA9jkCORTENITzQVd79N5NWd9De1xXCgXDZlHEqH9o-1739799752-1.2.1.1-85FcW2FGfaFCJQRHn9vbTueQYuqUbpo4p6DBx2NCf7RH0jXUnh7oomgpEqXOTtXZ',cUPMDTk: "\/abstracts\/search?q=K.%20Cheng&page=6&__cf_chl_tk=1gjVsjjFlgnFcJoxs5_uBNw1ipuweSKhaB3ekeljgzo-1739799752-1.0.1.1-KY74TAyVpyPNWGVCMILFdxk9rgEP0FCXrrJitjS.Ifo",cFPWv: 'b',cITimeS: '1739799752',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=K.%20Cheng&page=6&__cf_chl_f_tk=1gjVsjjFlgnFcJoxs5_uBNw1ipuweSKhaB3ekeljgzo-1739799752-1.0.1.1-KY74TAyVpyPNWGVCMILFdxk9rgEP0FCXrrJitjS.Ifo",md: "Z5ay3so1m1IdPlDyGWRpy7JQPYnTpTdg.5sTAYm98uc-1739799752-1.2.1.1-m6XUwG3sc.gaeyV4x7QnE49s09KXi7uxkPYPUzMTXBJ5t7GI9K4g9UgAe06sCqDgqBv4CZZeOzR6tmHIH5qLwxqvZublJ3vVOBViEmaDc04HaAbq4y_1lGyG60avzdY70sBFBV36gf._HSFaF4vnTzwg5WGLEc57ArD0PiL.ZYxj2gUNizfwgRjkqCt5lDO5bCp.TD276IARzGPlLlSlufGvOqzqbwcj8XZkVhfiBt_p1ihmdz.DSOP4RsZkyseD98qfSHMo87LsVsnFjxX2vXcVSBzzLtHflQayu9zgxXwKIXOUtxOIwsFrnBWbiMe9eeu2lP9y1AWQXd_VIPcQ5HwYiCjIvWKHcCx5cXKrjASeEm7XmZ.Vr7zaG9U4NxODw0lRhsIKB_ZaKtTiimErGRvIthVspzcdu1qLx4ZjICxrCHt1rzGY4sRiX.AsKwtsiC97t2zbwfJzCRe35yJ1M1tRFGmdSaT5SLqtx7tkaiCMeZJAut9_rdJZljqeNSB5ZkCtZeyX04dRFteuxlZAojYA8DucS_60RJBIVBcJBNJl48ZTJ8hG.fMhZz4D3prlJa8Rf2yvKf6KfsipzwHhqoKQd16a85dAS8x2WmC3K_7aacCZ44Yr9JD1Z68FZQn8cKIwqki5vFU4Knbl8mFB.kxv_MKT37i1rommZM4rKBgFF681GHcM_AS.Ncrm.rAP5tdwaGAnlfo29IMgb.Wl7kZpnRKyx9YtrgmEB1a5rkQh3IpheIwRpY21O35ttq6V50ktTkoxtnio2QmWwUNWAN8B652vnw4mJWKWtUejbTK0MGtfVlkc7zgzZVmz0VSmzHRU42t9WcupVlMkcU5oz4WIAyGTGRNNSStghuE9rlEyI6LspSK1._AIrVn_oFrpuspgXgsdcqwNu.2LUIddOy0ljg.kw0q_FUIKWPJTH_dSOKDOYcNV9XtLu7YU12vo_wMTmKVDB7RjuGh6KAmp74XA56681ZDhxkBQMkPB0WqDEup.DBv8qhoklzk6x2_8RFAWP5ji7U863KpJKYT2k4Qz4JqxzzNHWD9k4.DqECzlViB7mu3VUCuJr2SlMsMzChmRD88xJEQ5gTCQflAh._UU_TFx95_gKkaVXIDvsa9wSNLv3KzzcHqbaisuu6uDEVwTBYJ5F1bLcEUzIyJM2gyiLu6G3CMFaKjzZFmXj4vaJtXnxoZmdxydB_UlpcELOrozNQGEBIHmzBKkBBEttjtYM6X2rPJ1olVxJE4eE5Xy.omFv7Ce2C.uOfnkVX3FdcayBPpUR3xNC8pFeE1fL5OG1VZ0EP71Uv2B7eyv49_WUp8M5hmEkGM3ebaHExdRr.EzjOahlV0gg0lhzUObIc9ebzTr4U2Tsxxae4pAdlz.BNQLEqk.aenz2mnCLf55EfaGHKgYAQibBzO4sg4EhJEKAz3CFSK2WxxdSaYOwwIoWZ5F1s_KbSXvqqeVJwoKZh_OEX70tSMlmaOuST6sf3HjNGi.RQyP2Zi5czV98dIcR22IxuSfjIdMK8GASY3Xa.ArzUGy.jQvEfV6MQhHUmOtibqrmGTNMz0gavBMqO7_BDJ87eawH.rlRBwMXtdVu4j4fSGFePE83iy5uluWMfdqF66ZC3AJoSyar6p1sfHptAlltYwqvuPKzuMWFftsa5EzHCaWg4oQBbnWPrlgSSwsmieh9CPSGR3GXDu1mGMi8VtrUEsNJPeJwDSzEmJ2O.hMr4vXi1YheGIJI1ET.v1Y8QE71p0DJU_Lox1Jf.MvknrdtEeEWf_FRpvlCm5J2EZf55ARm6uBu8_0RxqrT8qJXAJMsaJDe1eFUlomopgdtvf5GXy9X9Z412SLOzEjI9o1Z4JsIphrd91WJE8eexsSXxo44N7CRnBuhjh2tlHgvhNZymLwTEm18zeUSorbmXx0i6NYTThaELp1WUmO6zlv8zHTbIPXNPGoc4u_mIk",mdrd: "FRwD1NLDiT7eHSwKnedKZpzNoi.Br0fdvdk5TFALG1Q-1739799752-1.2.1.1-SVQie9DLg4l0m.UzTNwe3OsUXNB6AN9jRDlhaTwVgZZbQF0FuF2wPx4rHaHyLE2lEOJWhNm7uy61sAdB58iBzDUjSjOJ.E5HgmcMpapbPE4X7noaObF2TI11adNJCChynHr57exbmIzYw5HA5pq7egW7kcx4oMal_FCHeByGugXxU5k.r9DCbGbQnMAb_Wp0KjdMIk_x1vBJa6.DMiLJysN7MgcUrb1cPNhZrjAI4OGCVQiKbFeqt_IlBRN1ymDao_1qy8EZoAIEqdoMxwPyouQ4TW.uBT58EaovAkeUe9pdRvXYcLdAdL6GWPYIeFlDb2U6ptJexuRitPtYmxZsZkpi0A.lhz7y5eEGE1f8r2lAsk2CWaHICPCU143xIGQpUOho7eudmZcZlkWD2LS1EEnZi9fM6xSXdizBgnG9gFyOdXvWvMCAPA.lPxkppMHhjKN8rnyhs9cuhJgYvH6KUVkNA4OfJ6dd55W8fnjfU9nvnX9K2EHQtbc_Yi4TKz89B7ye4nbg7z4R3K3Jj_A7c4nSk7RK9x.uSk_15phSoGC9ewtz555N.mf8rsTfiZrDhQhpxTUBPWm152mY8gju6WgXF5fQYdVH9TtomjnwyfkI6IDgT3GWT0.LWbL4.yc8ZwsfWcDPJClzAxsPH5.h3Hrcn.LUPx5rHMvhFW9pqOQe3qePphsv1fcuh3EU_MxHpMqZz1x_JWwcNIn.xdXZOdLjv0mYzbfiFsowcvAcBZS.cN37zHeHTz5TeJrmLZHwuP2eZPRLEFJzoGosRtRdsBM.cEfv2spOF4Jtuz7bir.3fpt9OTPB8sYUe4zxn8oYJhqP.1mFoy.99tyqeThgnCfMPJuvjqFcXIOmtnUjvtilPHPEumtGBueMiP29LmLd8qY83bkX3OL97xczfBjUUshV7zsZib5X032qG7rtATeRAj37glpLiiqPVvuOXXkOjICijDpEgkfnG2RBqYfyEo3Vlh4OvO_23LP5KcJ_Ym6yaTMLj0hB6MoWY_JURHKhh6jsobYfD1szgRi_fUeJoduyCZ1cA9tAOHezVzsiVwv6V2Vw3bohIe1nkoUKOCOCBdMT0TJ6gvUwbf.cf7ZObnBo_6aqKaUkeDWtryZEgPCmuImRZg0ZagQ3MHpXrPqmYa0t.mYyWAGTJaVW_O.Pu3NgW5GaIGNQSpInI1heWWrQqrC0dQDvkCfeKvZrxHY4T52V29ujttU49W8lhHaO_wW3JLqcAALeRCaxvXqzYr5RjvnmUl5gB31BTd4KKCrVmhA17v40XOx_pGhm7EJ104DFOsngJEbqdZh8EouLAmc_3NZEeqdSoxmdifnUVt8fO8QtPuhb0rN_sqhPpKlnkKUV2NE_2Udyopi5SimGtyAwn8Yf.ljodsd3cd2k5VFWs9lwVV5og5A7TtTsDgmErTtll_4fn7ynrFMFRQtCWDFtWKzmq6QMBqxVMisuPhX5hLS2pFkuavzCfJb_ESPCVgCR7kDrTPw9WUzHyMsdOfnIQAeMPc445BSW4yi9ttXH8vhw1P6qWAG2lLOdahrctYn4c1r9EuMXZ5y5tNoMIrFGAVzjt5HLljiblSNWwzeWW4bBO1QK3DPbUvHRETi.FaHcTalTqh0e_CxtVEbkTDgk6Q41XbHT0GNPHPdoZo8LcI1v1F_Ix3Z0ie_uH6Dcsaxrzy4OTzqk1IHKbm7LFJs8zsLCdm6WBbNEv4ApZAjaSfvSJN3QbR.Dxi.DN.iF5MpzAcT9.0TTrp5S.iZooLf43ngpc8I4OlKVBkTT4BUyz.qNDMk1w7pWTunuy2PTolj_uXF_TAeVAvGD4WBsMtAuodRAoNVMJgq.DwDHN9_npD7M9WYR0mGl.8oY4YFKPaNppSvgEkzMh4GeLGsVeUslorgxGd05D73.yqiJzZgMVU61OZSS.Eq4DpUNgLmop9R7vgvFTvKs2AzSJw0H9IlYKrXM5Dd1VXs4AJt2abI29vBRXdid.A4czhr964WEIQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=913633847d87fd37';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=K.%20Cheng&page=6&__cf_chl_rt_tk=1gjVsjjFlgnFcJoxs5_uBNw1ipuweSKhaB3ekeljgzo-1739799752-1.0.1.1-KY74TAyVpyPNWGVCMILFdxk9rgEP0FCXrrJitjS.Ifo" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>