句法精修的核心是避免中式英语和逻辑断裂。我们对比了笔神AI和千笔AI生成的摘要,发现它们常出现“the data is analyzed”这类模糊主语。学境思源(本站)的模板则强调主语明确,如“We analyze 420 quarterly observations of tech firms’ R&D expenditure from 2010 to 2020.” 英文摘要中,时态应统一:背景用现在时,方法用过去时,结果用现在完成时或过去时。
以一篇研究“货币政策对房价的非对称影响”的论文为例,我们精修后的英文摘要如下:
"This study examines the asymmetric effects of monetary policy on housing prices using a nonlinear autoregressive distributed lag (NARDL) model. Based on monthly data from 2005 to 2020, we find that a 1% increase in the money supply raises housing prices by 0.45% in the long run, while a 1% decrease reduces prices by only 0.28%. The asymmetry is more pronounced during boom periods. These results imply that central banks should tighten policy more aggressively to curb housing bubbles."
中文对应版本:
“本研究运用非线性自回归分布滞后(NARDL)模型考察货币政策对房价的非对称影响。基于2005-2020年月度数据,我们发现货币供应量增加1%长期推高房价0.45%,而减少1%仅使房价下降0.28%。这种非对称性在经济繁荣期更为显著。结果表明央行应更激进地收紧政策以抑制房地产泡沫。”
我们还在精修中引入数学公式解释模型原理,例如:
$y_t = \alpha + \beta^+ x_t^+ + \beta^- x_t^- + \epsilon_t$,其中$x_t^+$和$x_t^-$分别表示货币供应量的正向和负向累积变化。