在轻和黑之间的变化的水准在一幅图像或者在他们最大之间的比率内估价领域以及最小价值。
The level of variation between light and dark values areas in an image, or the ratio between their maximum and minimum values.
叶面积比率的生物学特征最为明显，冬小麦返青到拔节期间的叶面积比率最大，拔节之后，叶面积比率逐渐下降，在冬小麦乳熟期前后达到最小。
The most distinctive biological feature is the Leaf Area Ratio(LAR), it is higher in former phase and lower in later, and decline to its smallest around the period of Milky Ripeness.
假定投资者是绝对的风险厌恶者，其保值的目的是将风险最小化，由此得到最小方差下的套期保值比率。
Assume investors are absolute risk averter, and it is their aim to minimize its risk, and get hedge ratio under it.
假定投资者是绝对的风险厌恶者，其保值的目的是为了将风险最小化，由此可以得到最小方差下的套期保值比率。
The assumption that investors are absolute risk aversion, its value is designed to minimize the risks, which can be minimum variance under the hedging rate.
进一步研究表明，波动性和相关性的多尺度变化导致了最小方差对冲比率及对冲效率呈相似规律的多尺度变化。
The empirical results suggested that the correlation and volatility ratio between index futures and spot vary over various time scales.
健康受到影响的加拿大工作的员工比率排名第二，而在新西兰，印度和澳大利亚工作的员工受到影响最小。
Canada had the second-highest percentage of employees who said their health was affected, while employees in New Zealand, India and Australia were among those least affected.
当负极性比率等于零即直流且焊丝为正极性的MIG焊时，其焊缝熔深最大，焊丝熔化系数最小，熔敷速度最小；
When electrode negative ratio is zero, which is using MIG welding with DC ami welding wire being positive polarity, weld penetration is maximum , wire melting speed and deposition rate are minimum;
当负极性比率等于零即直流且焊丝为正极性的MIG焊时，其焊缝熔深最大，焊丝熔化系数最小，熔敷速度最小；
When electrode negative ratio is zero, which is using MIG welding with DC ami welding wire being positive polarity, weld penetration is maximum , wire melting speed and deposition rate are minimum;
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