CI Nwoye、SE Ede、WC Onyia、PC Nwosu、EC Chinwuko 和 CN Mbah
????????????????????????????????????????????????????????????β = 0.04 α – 0.0024 α2 – 0.0288?????????????????????????????????????????????????????????????????? 0.0160 ? 0.0208 N mm-2/%?????????????????????????????? 0.8839 ? 0.9977??????????????????????????? 12%????????????? 17.3611 β + 0.0417 α2 = 0.6944 α – 0.5???????????????????????????? 8.3333 %?????????????????0.1378 N/mm2???????? 15% ????????????????????? 15% ?????????????????????????????????????
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