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: '9134f686ba78406a',cH: 'rEf_sLDdZZ0QsMvjOhInA9rjcHFdqFb3g0sg6LX1Wuk-1739786768-1.2.1.1-ZEz3UcNbQhd.IhO53ATHgHWZDfgCCzsjqfjzxv7VapLpW4UXcXxzwUzMPfN_Xxbr',cUPMDTk: "\/search?q=Wen-Ping%20Chen&__cf_chl_tk=AlkEWK7ZpnDQgTM_HrZUEt5eVp3.LRPJd6pPv2frwms-1739786768-1.0.1.1-GwhmS25RGs_PZZp3MjJMmE9GvYJLd4CCGAybctNDsrw",cFPWv: 'b',cITimeS: '1739786768',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/search?q=Wen-Ping%20Chen&__cf_chl_f_tk=AlkEWK7ZpnDQgTM_HrZUEt5eVp3.LRPJd6pPv2frwms-1739786768-1.0.1.1-GwhmS25RGs_PZZp3MjJMmE9GvYJLd4CCGAybctNDsrw",md: "ZEqtRySOq2K4SQGHIeNzy_r_v2MBZPZ7VLmqSVJauBM-1739786768-1.2.1.1-ALUwjsqvpstIgmYlOtrg3.x3p2DrtyIXnSH4KMqqHNv6eKAX7PIURh6gNPsaBngN0o_GKsEdut2Uv7LGQZBlDIYe3oODMaze.qKZzlymnF0mHIhy6q81qtRGUHTk7J_NT99Tborqo5d6lxRhYrPONuG0CCIGOO2A2iN8wT3vP4nkbHJnArj8xRAnLIx4ZFNV8HBg2xehwI1VIlE3rQDQm.pmxLSsUHZGvJ5Mtuv9Sd01qN6qYLSZSqU3QJNgQfSw_xbbFtkUZA9M8uTxIzfuOaloexjLi2iJMQ1g1T5B.AQb6Ye71DLrQjXGGlEYsO928Jqi5Ea3wWRH7zFzyUdAPDU3g44dK7nhUqzStSrkCnWl.aF4uWcEI8W9fhomfkJz4O1JJCkMcVwoEmyhGmy_22dp68ruEviaEsVrmHCpw77y7WAOr8oEjWhrow.RgGbKp2mSou_dFFl7fddeheLnKvMb68L5oWNAAo5wkGLL4UU4j4._mKp9xjjEx9oibNNUYxJeNeq816wKHh3TF3cDLLqd48nbL5K883Dh20SQgLGuaKG8u_iyfqvd.g32_elQmlnpcWijCLjJCIiTpCGPRfPACqi2Kt.3Sh4GdxqrnhrmbWEC_GHT1Z98LOVkv0qbnVVpBnkzmvkqdxJ7PO4WTAQHq0LKYD3Cx6ilN77zfU0TbzVcrsZ6NWi_5prT5BTIt3g.hTusZroMceJmbWlWPJnl6ums025QhquKvoySlw9akwYOTrFtQa7BNsEjcxvJaTML7I1gYqREFsBKDH83tuXaikRlkeDKlegG8Qmo44ioKILQVym2bjXsmvwvIxm5ob1e7oLyrflFVG._x2SxJBzFiR5J6whvRGaC3FV9u9.eRJuevrEYsncaul4cmkIZJMUpnm90cfDEvuNUbR1dI4Z8YAvDlSZI9VMOBPKhvChfE8b.cbXKWYgIsjFQMfixO1S2S1e_7XiTxO3VYbjTDicA.vYEX2c3InytQyTk8CK8lbsmHdatlsBNDFdMibqGkn0Hp3ZiSokByZo22WNy79i.homFWqEny8mQ7wxp.YF1mtrvFkbwyK1pYdeQ3rm9lb6CJ9gFc4FgLbVhE3V4t8hP6jCDbN9LD8eM9X_Kxk086K01umyV7pa6j.k0CVWT.n.oz8to5GqlDJ3LJQIvD.bClRnWoo55Xte8OccigU2D2xna3dlTBuLhgqnHEwKU8GN_HvqvnfbZeaHW8MLcG7N9YAIrWAN9_ocF1fnQBt2I1Xj8DE.3lyMEoUoZhNiww8lYAwTAFa8PsLerCMJReUcYSFyIjxG_seo77Q2YIqNPty5jDoJOZh7XP4Rn.UAcrIcp7iCPyXPyVZrwhX.OO_VRxU3zDPIY4fe2s8YpU6LEMSkhR3JFHjI9IZ629RZEvy_b7ZCIE6GWXuPMoZBxfgmi4qmjcXtPI_1OFHsq7TUOzT2_TS.2tSmfiSqolTYydG8fWRqwP_xHvTkaMivMuyUSB0YCOtY5JfzwTtMImLEEBNNKlvAtd5eYJBSa.Ej7dSr9WHNKzGMUykznv0zQu8.l7LKk1DMDUI81DU2XnongFdN7tk2FEL7sO7LAIncCnDFUkHbrW2OUGKxWyR8GR0j16TMJLK0aF1GVaVYnA7lUwZLDgHbCGIdVOCmYyQ.Y5UFKpEgqrCHM2j5bameDEf1YcrIZSP_sPIQ7G035.OxsBlevILeIf6HTsEJ7u_j9Wgqy1ggL.TxfIoQCHBS14L4iDngLxBmiN48pM8pbGISoPB0XUwFnYisgaokxpCfIOECGBq.Q2RyZDeOr5PBCX._A6.Btz8zUKukWLAvIB0qkI1Elc4hvw1DTIhrEgoTDBMap8J.Wq7mQs56AxDJonrJdx1slE0LjrYzB6m0VTd_4RiRikD0Fqua6jBXlr10T",mdrd: "68PauL1WKQpbp2MRbNRecXsWgoQeur0eZ2O..ZytfL4-1739786768-1.2.1.1-i8Jj_Zog842jFR4mNuj4Ec1hb1R__53wC.HOAeObOfdYe0m1omTg9qvD.2xmZqAJIS5Wd7rGTA.PoybbU0aa5LPlMcWGzmw.R7b0jSHuPBlKJhocCAbf8U3DHwDbag8McVHCHiW3D2rF1aMKRuMgpsVhlbRF6tbdR_VvC5ELAsPw5FpWv5DN3dsICe4JJTKQyZhDokIAdU9K.5S0ag20XvXR82Fxr4faBPsYm0QnDEnenOKygunB0oQ_p7WDChhdNPfWaU5PGjUHYmOiTvSstNCNjFun9MbXUrJ_wMpf2AKFiurUueq6DNTEVXc2xcKHKtIHkk7t3m69PGBxkNfjHRmj7Zih6nxvyn1XeHQ1YCzpQIvl5nJxaZnvQ8YYp.8CiBoYm6S81BEI1fUa0T.OnHhAgvDfJO7pweKB28sspBHAeXL64UIGHb_dqLtUM5.STvgGWbahW46dEjV8tCYoGTH.vvpgdClxWKhnbXF1TBYlA5NtHjPwb7mH.zIiR0SaVIQm7jks1PaxT2QureWTSngjPqRO7MGLX0HGjtS956LgVk4Dc6oIoXIHyuKpqdYce3NU5weEjkhcGRxyUAiMo.lu42eDCn9vp7JIc0qUlBBHIHfaLFX0FD5cgm6eHTohgtUQLbm_ob3kqyWJb5t3iizeZZqoGYlopfFEhgwqgJqB8oc.zODP1m82ByqzTPgpE8KS_y4WZG4s7DcbcAjkbeGlTp7Q6RCUL9yV2uA3tvYNELWW.9YqV_70RijkhfOabUT7QpITlsuUne3E0b5FpEab_3lEOlUMEJ.SRW0YTr6r3NB7XYH0gzTojOI12zKAaVcvWWHUnWiFHRotc3cmKTo_RalIGHFHpugaWSuUh2N9O5ql43SCl3X6bF3ZYteXmJtqGw47BTz6gN8OkF8YP3Cmh2c47vdZcVA7y8l.IEaOJwMyuu.AxHM5zHeRIuP6s3s2Ya3o8ClshfG2SRq0L2F2B_bMTbzmfV6UeTSghLh4pKFJY6pkFqLQWRmpxXw3MUwIh4B7Z7O0FAgf4uSO4GgPQCHr21r8dTCvbL_QvYdi1yxCuVKRY23Qkhtcorb3FDIxL8lJRFujJMUl8Xa9STWjiqxlruTOy.0rh62pyhYAV84.RGfwoKhcN4guj8Hmf8Ty4bGMR94zDXcqAKs3EW0dqGM7tcZVwt9.Bbsq_3YIK4pGtPvhD1m5Shv0ev2EkjTsEs605ewCkoNkEM1TF3dWXSG_tCcz_6waeIiU.N.u_BkEmF6AI4m58oBX_c4ysdWpz.0gpnaGedaDfq4zJDrTiI1N.quxhQ9VNOx3W4o6vqRrbBfgncvHs34Yfbj4t8H8MNpMAsxVKokYAfDRge8nBSWTcQ5Wyalmq4gG.qFvWzKrYSCxzx8L3oYodpzy8Ob7HZ.n8jkULWowExoxA.8s_3ob.YngxMJ98BNRZwfq1D5SbfKfsvrJYjd8BjQYl070v48v6SWsxh44tQddfLc0HHh2uURy1lAGF5.CzJA010kJjnKoI.A4jFTILx2gWD7BvKRAyxU4VVrEbVCjUJjC8VgaGwsbt99uEBHYy34WW9KcRXt93lQsA4Lz_YLyI7YPtDLlEdccyuj8s2WN6P6KEt03G1OP5bVzKJhWi7PL0tvkkk8nQf5caGGrMqBhQ.o9cmdCVs9X9zdQs7lfglgfM.nzkbR24nVKYCVfHWnwQy8iADHt.5iw5zZKeukQV0HQWle6C_viShGRd1XtclO6cH3lIJG8s25eZjGf4L_mMBbL_usZxODYtwQ3S6qIVft3DRdf0lFH4JIFmt3UIocIXDgR9hxAlEUBX4JoxYvq26jfmGx0LGgF2XA65YssPxsX1W0CRQGCD0aXtCEQLEuumgHvvmin1BymnvawkCtx08swcP2Lg67Pd0LTaXZ5lwKQtVK.8DJslaRG1l6bcO2441VXd9.O_Sn_tzHIN.RQXgZCJx8AvEgRUBgdjh6r0Nls6dqFizg3EzbI3L5A2g"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9134f686ba78406a';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=Wen-Ping%20Chen&__cf_chl_rt_tk=AlkEWK7ZpnDQgTM_HrZUEt5eVp3.LRPJd6pPv2frwms-1739786768-1.0.1.1-GwhmS25RGs_PZZp3MjJMmE9GvYJLd4CCGAybctNDsrw" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>