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: '91353f80cae9fe0b',cH: 'YwVr727cgwR9cNPrPo1_J.xSDB36Jrwr3qYJvDCpNCk-1739789757-1.2.1.1-eNOrMXXEAqqOXiPEBLrIq0bc4veyMc3vnpnjPlv18Hkh8N6GOcP8_WSjh5Xh3mE_',cUPMDTk: "\/abstracts\/search?q=Songbo%20Li&__cf_chl_tk=3kZ0UQzEuWp7wSTnFzIzlcFHEzb72D1Pl3vu3fMoR6w-1739789757-1.0.1.1-FkpHTfsOHBxkVyNXo3hqFyVWXKhOs6TKIZAL2gagDu0",cFPWv: 'b',cITimeS: '1739789757',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=Songbo%20Li&__cf_chl_f_tk=3kZ0UQzEuWp7wSTnFzIzlcFHEzb72D1Pl3vu3fMoR6w-1739789757-1.0.1.1-FkpHTfsOHBxkVyNXo3hqFyVWXKhOs6TKIZAL2gagDu0",md: "20pvs5ANkyYg2sR94YJuuU3T1jCjkUidEnyOpk3GDC8-1739789757-1.2.1.1-E1g0jIGDpq0Xyv.HyDXLCD0zkStU85ykGVYnxEogpsYVjIeA59McFBpnMfoMj2GSt7up0ydsGYjXxXXNgaQkGoVeBgEsoqiNCT4TuUyZ.9tdHH_uvS4V.JtPGzrw3PFeEkASVhinWTIv.dkUWvx4NzJ6jTEWgUaw7.mbzeneFZAmcOuEnd5oG4ZnRXEol2G2z.mMH4p0XAWHa.6JjUx723aKjdFza4jgwG7uweGtwLURc4ehVifx2DPDAwtlmhUVipYOuQG17Zphl_38O1odFwZspoSqX6UagZFZZRWIvFW2Fvok9pOxGzIVGgss8L4sx8q38lFlSsWR0Nqh0TBvvoOj3lWjikIPArxd5aVDmB10mcbOEXPi9sLBW0r6JB5D3sKkiOeOcoAP4nmVOBRC2xlyuxz1ACWdcGSVE6UUrFA05Tug_XbRWmwpolk0ASZ7WTuxNjVC7mZt0qS3ezM1HPtPggTMEQC8NcWfih4Yqowarsm1TSUYQcia815gvQTcMpaY92oefu.sbv9SprWKGbRFzVb9lkbiUqoAfNyIWHsjb2ftHlV0cmQTjOX0gkYZW2AuJAy.xGCfdixm5LQMP60ffxUUroMJduFNcNUSvRpAuZLrCZFO_EIwBXypxBUJMyGLgC_tqlbyogTAAvJSJhSF7hx9nYPob5dUTUnEaXwr_bCwEjnJH0XSQh83s5D5Wdzq3IadYYNIqaG98pvCyuevpMFEeYrEA5c_s_Nvw3VXANcAiE7JUd0HYx2PaYPXoTY.D_FbSHwE4DcJ7bJcUj84AVdKayJ8bV0DyYpW.PkJFa_F8NCbcaWd9Dm.iv8JH3UBz5rIT0H.2ydA18oS2WYDdjDy6PRwxJ_ifcRwj_Lv4cZnIsUEEUjjKkZ1COZa9GJh90Gs1SF7hqe0v_iDmIz5T5DWgMokS2x2wG4nvuPLfhgAUjkT1iGsAqyCWC6Zoq7yA3dpokAQyVX70S6NP3hXAICq1cm4R6etjBrr5y2xInP0Mcmv1vewS87VnE1aW6DZGiPLmg5Dq56iSlMOPrfXtoMKraLynevFd1mnuUqZT62xzBGgbfdOuEpSG0H.Ep76nwWOiawW0L0mmt1RnTrTOx2D80DMxi1vDuzk5BtXRiCK63eXUqDZp7vjLZs3wRXgL9aLUbWhwdaeDAofJFEQ2CKVEr4Ue_HvB4rMzKl3_Z0JL_f4FPkpVjOvmjl16dAqeaXt3xZG5y2V2651ekJXXzC64hL4tri.UhAOdxFTAxp4MtqJ.AAll9v1oS6eWyRGF8u0iPQD2oql5JS_BxLUSi0hz9Kw6kmTa_Kb4x_qwYM8IEICLaZHpDbHGBsu7mYvm1DGvrKzBrxIP4gtdw4esD_.e5kYy0JMuGRoSXjyhUHuNhBjtxw6oWrY4c_EDLr1hMWs4awjK.u26h81GluZx4W0bhpinfDuV1jK1LAIgq7jO9QSQ8t9c8S_P_TFdTB_2McaGmpoNvmtjoDGIPP093Yk37SrZxkP1Lo2QB6sVITH2bBeZU7iZK0yHaoxCy_MJER1w1jLZKMRAeANN0DFAodnc6FAiLRtmqqh1EwjMT02fxzqKBDiQrb3UYz2w1uGEpsotBpzqmpBt9c2yXCEw2QL5xaDh78CaOI4dNSkszl7ySjL.WoMWvTWUTfas7uZHDhTpZjda7u2zxUb2PsbmAZnhi2hfon7IKylMk6CGoqFET0ZVbQcQ85RtDu9eEXOgJ9yq8E.rIN5wc26JtYphQ4C160PHzOgQAIWJXjFeBtBi6Oe5nd8qniRdxUJmxI92AHAXUeVA7LEYc_OCcS5Xu.07F83bVgiZPuj9DhpVSgQbckaNqZE9eXw6ZU28v04wNt_aGndDpx8ylVchehqyzWUd.OTtlTk7GYCB2jJKVG4CQr0dVvxl0.wqpW8Qw_4gtusd6_w3JU_oH8oMQ",mdrd: "1Pdnbx8HwlZpyAVmYacBl474BS0Q8liKhAPpgnEOe4U-1739789757-1.2.1.1-JMSEnxuRpxSCKTf6VD1g6OWPqjB3uL4zDSl_D8KroUjt_bXQsWBckecJaiYgKJg5nV868ahf.1AGfywnjztTFPCGkRBgEY59a3Y9lBA107IHIBfMU4Uz4ovlQsqjVHA0puD2q3z6_BheiObCPI175e1Att442vT8EhjytZLICXSqPD77XRMvkVELT2Zy7V2GbBTbMotBFkKVXccv_fvJ6bbBubjw2KGHOnzM6sDPt.Zt5kJMfXCml.f4QIpceRue.T8PWz9T78Hy0jBYzVnz7jHaO1Wl3AzqJAKBjlmNUXSsvtZhrp1cc1h3oc3j0ciX08GWYwjrPnlnrPv4WseMEmJBNq9JErxuEUT1jI.XHH8JEc3M4U9k2AnzeX_.M.ybj4Ko0yRmaMuvNoFWvxOXIsPdXhWH5NAAuBI0f9QxLJzh8SgZq_VLm.kkGJBREiLE0KL5rnzQrCeyLJDqG_9cEqjRXUI4MOFP6RCjY94T1S9qDP32JtwRanIaoDrLydb3Cr99376dfLFAeIsSFpdyiaaCMBwbgaBFtU6KPAVSItbGZPwO55_DjtEyu8XF1LdRc1ngMtRaOaAaI_FJNuBndq7yTiG7qsPVCfPsximt3JkMkhGK0Id6Z2sI8e78hrqS6odoNRPhogbXf3HAncDcNu8aJNgsai2Pcx4tHFHR6X0mfmTIuVu.7mZJ1H.abi2KC2R3L7LmNN0JEsBhxun.bFp.f55BV64aHBQemOLQIRyZ7b5Qv1L64TXfE.mDzJ1sPsO1v8GFjcg1dStmmWdCtnfPyd0ImG1Zm1NiCROToIE2vasXbD10.u4qdo0RoGQyj7OWzkz6dg05KG87_RqSaP5hQsusovJxqY2MdgOvLx64wEie1iuLZG7DiXvdE16GMl8ZG1EAO3BliwAF4acUJQ_9PrAcO89pLBOtwAHpsSoi75I7hwqefwJfBXKqRoAQXfdBpzwLInHWCzH4wgSo2XKtvkqX9iurAe0oOrg3EepXxnt5A3UUB2rGpfE_zuGvzmusG0c5mzKbqNR3YkJG0.xTiUVPUYcIzCmb3mpjQjGa7zGXemwsYYPK_G0_W0GUyWe6Hld_wpVRvdCI3It2IbjmntYvB4fEir6bkTq2EbjXGnmmuo_CO23N.UAGMVCep4_ICJJMUZcTXh2pI.XN.EcgLoSlAP1d2tNH927ki4ARMq1vHsejuJFH8wgdYG7ARD3F_LCD3s6WIGKAVfl4ZpBqFruF03CtVoIR44cljZD3s6rjrYh0aUo93PzTtckYjEL3biYw7wnqgQwopFjUpOSbqSfZbssi7vaQ4W8cXM0b24NLY.7zqeneIwsj4rA_L.rjVAu1QktujsmTF9r41zdJZZl4GooEHGa6NYnUS.DVxulOmJyezRRryOqlXumsVKC19r8XukZU9nT3hXixcsxwnoPcBc8KatgD8df9K_.ILSVphWfQqRUnEb_wvJ4aGZkLNVK7zcH5LSAF3oiQjQxeip4wdgjtdyfLZayW_zj3ske0IyLxA7SNt__MOgGOvJXY05tb_1gRWqL0uaGKqlh0ZBUB.RxIBUzi3OMOK1JX37AYYfyQGWQGoPXI6Whavwe7TO3VuMHASQzaaBTnohyw0yWfTfkUd3lSEhFLkUrSoQz0_vOJv7XlSwaRLqHuUYIvTUqWMzdIH3dZmrXhwC9zikGRpczZAMALETOI1jZ414PR4QMGvGAVqTeLuX.WAQWTYRUzDNcvVaDmFJ2P_3KfnRAdCm8rug8kXnS87WtQLE6VLgGoDU92pFkdDrNdGDE4MqXk.mCu.sPHD7_4LmK_bo3Vt6NyVhVETNWvkOqKVteUqtf4MQjZtdz4CDep3eXWPnWIQZGP843TcQEgt57I4ScXOLzRjtpWhCLkDOQab2_LGprpX0QJdOkqb.4rm8dz3CmCACrDOwAzRPM4GCuW9SXO.oh837sEjufpC1YXSomyLQ8UM2NX9PRCd.PX5B6jhQmb5PdO7XjcUFJCHaYm8HZdfbvyhH5bPmvqmIk"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91353f80cae9fe0b';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=Songbo%20Li&__cf_chl_rt_tk=3kZ0UQzEuWp7wSTnFzIzlcFHEzb72D1Pl3vu3fMoR6w-1739789757-1.0.1.1-FkpHTfsOHBxkVyNXo3hqFyVWXKhOs6TKIZAL2gagDu0" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>