Tīmeklis2024. gada 2. nov. · Under emerging water scarcities in the face of global warming, optimization of irrigation and nutrient inputs is essential to maximize input-use efficiency. Thus, a field experiment was conducted with wheat for 2-years to evaluate the effects of N and deficit irrigations on yield formation, water productivity (WP) and nitrogen … Tīmeklis2024. gada 10. sept. · IR的是 Information Ratio 的缩写,即 信息比率 。 IR指的是超额收益的均值与标准差之比。 需要多个调仓期,每一个调仓期计算出一个IC值。 IR代表因子获得稳定Alpha的能力。 I R = I C 的标准方差I C 的多周期均值 IR有时指因子IR,有时是策略IR,对于策略IR: 策略I R = 超出指数收益的波动率超出指数收益 策略IR表示策 …
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