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: '91350d84394ace59',cH: '9t38pQOYnh_h85gTDQ4sfv64VTnwfdr2M90OxCjwezk-1739787710-1.2.1.1-u3ZlMiBoH2Mg21hbk0D4X_ikrA0tYaH2ARBJfMsXbRQOnfjH41Eavk9sxUbMXBA8',cUPMDTk: "\/abstracts\/search?q=Xiaoping%20Song&__cf_chl_tk=M3Xqoq_6fAbRkcXweabcz1e.4d3W4PIIh9YWJd0o2nk-1739787710-1.0.1.1-_DXOVUHtoi7b9hMR1fWItVVgDm7NyG_2vV1u92bGWDo",cFPWv: 'b',cITimeS: '1739787710',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/abstracts\/search?q=Xiaoping%20Song&__cf_chl_f_tk=M3Xqoq_6fAbRkcXweabcz1e.4d3W4PIIh9YWJd0o2nk-1739787710-1.0.1.1-_DXOVUHtoi7b9hMR1fWItVVgDm7NyG_2vV1u92bGWDo",md: "Hiw3rWLIZgcg4dKXdnDNCQj.LbCfdoPoW9Kon_gCmIg-1739787710-1.2.1.1-xkyVTnrsL_kqhJ4.UE6YymTs4zF1oxSholDFNmtbCs8kyUI22o7U8PENUMwybN.wrn9G4TDKpp0JCnDRvuPeuUEP7H4vLTTwBV8uB5GjHP7zXbK9UmjekLq9F3r0aaC2nmlPv2QHzTEr.JwTGxLj0AyJ9Byua6zUc82WHGz0.hdY7F2.HDwKAjvKtJX7ijsxvrkgMcQuVokcleF7lqnfKeV_kZIFu5Gzo68i2bkUdJuWT4kLIifVwFQVyffllYdgWxZv9.gKLDXIhiUSJrA8iRUJyXVnzG81hAHxFxl6.C7Ecvk8.v6zj4x9N3BYzzmZK_xPPFFovRtTmSLDUYtKBmdfGzNI6tZSosRKYvBSTgUvDNyoSgcT3Gs155aYNUhJRZEQc8cVm.LXQ4uouss8mafBBZxRqcrvBj2Goohmyw2G3icPUI7l7W6ZuqgaSAtvoXiY6ZtyzaOkidBxwWkGgR7oBWKRV2H6ONZ8ktJuo.D.dJxdX0WT229Tra2EHJx41kiwZuWJcqk69NOBDDhgUs2cYqTS7g9Q9C640Zwb69M_C.neIbNKtOk0cAmhrYcOAy68v405dg.Y3Dli22yq4IeZcQnQuTb6LUDX9a3UuwkkaLkxDP8QNsp_DN6mcAvGaEbOqXDC4OXF_.6owhlCONZt.vr8yeDII31lIcAjSafmk0O8VF4Nv_ovz6tSpAEyDPc.qy_VmqqVAgb26b_MAn9by_niYEf62z_tz7jOo1ewm2NzAdT07swWd5PZHkVX99ax9tZ9Xn1lPgO04Bg1XzThv4PTbnivtqbcAIT_YdPTjH32F6RgaC3wpGUchGuMpyLhV8UQI5MWvm_exMYZz9y0f6o6UfR0yDBlP1QykzEA..3FIqGOwT5Py3YwWH68e8Nde697RgIWXsiJNFH1G4JrfRbM8Ouo9ZDzT74_m18RGWW6FjhR3wLspgTKKHv4z3nlwMkEFQmXbaJNa5io0L5TV2NTiaStNzl3R9znFUl575EyLiG2YH4I0sNQjOZ5U41cGyi51rqy2NNZxU5Yvo80zEzanNZweQz1G4UqxEsMM9Idl4ixnw7H_zNSIZNmGSXWQSV_LotH1xZI7gx4elCX7RNSW5gZF8u3VhBXLNjwcbMAADD.eaYTLTPbNlyNiyxlCnivXWV4G_0JId3f8KpZ6olZyn33uOCXnThOJBpy8uAVD8A9dHiUPftbPXFmPCAnRLghLPOgFCSKoyC8KncyDg9ZetsAx8xmFiUHQ_9LPalVEXpwCGyZhL_MDyWms20pv.aML.vVtLEgTEQAJcxfiHhq4AvW61nIMOmnSCjeDBVRZAOQjtfkdg8Notat4HVTikqHAHR46FpUpshXkAsOHokoVee4bgvyDHwuw2zNFrKwNS6RywjR8U2ApH8t9_hIDKgMoD_SRuHKqDU98evg3DwgDVQc7Mh8ND3T0vhJlJ97IMJ0CVddjF1SG8M4tenWB3rkFEfV8keO9_za.2Fu5sE6ofB0V0wT67JihRy7fxFR0GQqKhyQJf2xTa.kjPko_lq_YKPGo.rBD1GVrgh._Z1PO_OF6M.ZjhesdwWEVyZQUyJ_WX_1xOodND0.ucTywadJthN2RmVqL2VCOsDHI8K5CB3ErC4J06dFjISp10esyi4YXpXNGJDqomiBkSpnlizVRA4gjcGaFDLw1Dhyasr4lcBh5kr0WPJWfBDet2ko5xCTuQXjvmA3aynUhVdBHBbdHVMbOyw3Jf3YXDZF43fxixG5tuz9FYCT7VS36vuiPZg49_UpGW6_5cdUPKOqrA4zHS9otBKGzuzeIa4mlUIM1edqmIu44uIIFlbJ8S6WNLrY8A.JTUUI_GCbG7ztPlQkYSpbw73OPwyS8ol9UQOipjnPyhk8YjxqIfcaDCDAqYc_DWxiUyWp93wTsFHoeOaehrVWDENtAjmWgwql8k.YBBiMqyHRRYXmDxo",mdrd: "g4Ri9YC6wLn0YHSAdPE0hd6o1MCz0UCFO.diUnX.LhI-1739787710-1.2.1.1-HPePKEa_j4UYkypzk40Calr0xpmVHkoLere9YeWkiyzz3ncJtcKSEM8AvnuVLuB0RXeC_hLN0MVrPjvNBifAo0k5rZQqiF6kANSLYUIpjDLQIQqxAsJd16S10s6DHPFgCi2hiVZfwA_QyY.Vr1d.nOuIyeoorE3bfsj4l9urk3zebbyoBWFVcm35fqEEPI.XdLCUXjj_76mQax.o9thTChwBH8DWHtFtjPvqYIv7ll.JxafYWL8Rss1NyAsaI_9YmqNbSpb4ucP_uEkbdHaGhStiKTDofOOLXWOj44PpNNfe5ADoRQVN8fQilEOQKoV5NfFXlNQ.LyQJMlFG3xkU0fE3zfGj7ttrTw7L968cfAb5w0641vL18JnHQh_iesWwDi686voO6OgXcbnFEHVioEvFXvdrEEO3sVog2R8u65vQUHca3UyXlxan.ieylySSvuYx.cE0LETKoxnbdnY5n9apuCyIU7Pv54lMKDvqepY3z.vGs6AWI1dqn8AUzXtylN7J5wpgG0MGzViJxdge6BiNFjpW98vBieQJlMOXeYcQawCYWsWJdn9WNvSQKPfcUdfjLu8au1HEtxrkRyehck41s2069.vjOGwPOi7BHC3HrWFIB7KehgqS2Ww976Xm4th83o3mXbW.nZB.J7qyilvV5Fcooo5XHvmseZgJmkZdTEe1RGvhbU34ExlzwcI7Mh8gkvdnQUHnkKlnHRIpQ2v8p4BrwxivZhJXW8xOO1ibwe0i8GjOBeK1sfBTAPwCY7khqXdribyB0xV2gcohlo588WDsHLZofUKuM48Ypb6EhSvuIKkEGI4uF.g8H4NXFhXuIwMHCAw2YOu7srAivYd7hSNktjOU6Vy8eaCwG_OUjhI3grnEjwHOyXnT2NXA6IgqiRpvP43MJY52so88n4yzKzLekvedZ_I5jlxYiYu8HWVgNVr5S6Jvp7s2iSzXrXnD66OnVfgZXc87G6BzA5DQ1Ud1zgsIXS7rT38T7eIHP8xWqCoMmCgH_SLvIb3dxRRGYXxR.jQW0gFjYtb1QkWS_2sNeLUC.GvAbsRKkq9MGdmFmWxM84X3QaV4pA0jruAR5.8QqMhs409bnKHgGZ7S3hxC1yPIUrxMnHeV2VYfrk5GPk5pI1ziqzDTPQU3kivVw8Y2g4PmphmyulXzFHSWl19HfqN9e4xP1HrC7oKTM7u_Vw7Nr1lIJtA6r_YhIeAIz9LwqH04qrxRr70NgAChc1dxc1vzQA8NRGOxl44Fq8woppcFAvl97P.SuwUsFJOQnaY7G8dUMJLFLwa_u8qE6s9z9.SO3ehRXFmL0jdJgprd_eGj.kiAzVBKnezSAXIAs5hgAQqA.NZLIfFP6k.pY0aZOh.FL1gXwV_2vbiJXTZpZ8IVzJZaz_HvZSJwPFzMYepsYQmBLpoTZys7.g4hykCUmOZQU6Xfkf7VJbZcYdRK.BBBT1viCxkgHyHCN0urYLrDncBgC95orzNdBDviwh8.Z7kP2cknqMP_nPwotsFW94voTEWYPmLgGvMBP5pgxF7OW1GsMCDOJhBpIEECLyFuZtWrFWHFL2dKFu9enuN3a37M62DTwg4ss3LkIfzoqyemqVvGsjKjtGiFUKZdlwqiquFZOMMU.HMZuBJCGNrWmJNi2o.V312921ZZRpf5f_yS65Yvmaoe83TxsqVW9J.D8htuqRjtcNTb6vl.mDk_o95t6OAh7mvZXjH_JLcRrIrZF_UPSGj06cR1i4AGYEswATiZT1VSbymgEjM9q4zDWacNvlBZeyG2r05IrEVlhRuZl7X08clK_zybUuD9smeV6jv8yog8TQbci_VGbNl9yd.j0BfKVtv9lCqiXzdSpramR1MdVzYI9NH5ifrMNu2KXETwy5f6z47f4.UmRxUU.jnuzR1KeI7dv2Jhc4xkCW.R4qoCZvjhaAX9owHUHQLZMUSkJAqlczYW_bbLZSSERrEiIXi7DDOIzErb"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91350d84394ace59';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=Xiaoping%20Song&__cf_chl_rt_tk=M3Xqoq_6fAbRkcXweabcz1e.4d3W4PIIh9YWJd0o2nk-1739787710-1.0.1.1-_DXOVUHtoi7b9hMR1fWItVVgDm7NyG_2vV1u92bGWDo" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>