前视偏误（look-ahead bias） 是什么意思

释义：向前看，展望未来。造句：

Would you have a look at the overpass in front of us.你看前面的立交桥。

We must learn the lessons and look ahead, not backwards. 我们必须汲取教训,向前看,而不是向后看。

Backtracking only happens when something is unambiguously wrong in a lookahead. 只有当向前查找过程中发生明显 错误时，才会进行回溯。

扩展资料：

情态动词本身就具有一定的词义，但要与动词原形以及其被动语态一起使用，给谓语动词增添情态色彩，表示说话人对有关行为或事物的态度和看法，认为其可能、应该或必要等。情态动词后面加动词原形。

情态动词不能表示正在发生或已经发生的事情，只表示期待或估计某事的发生。情态动词除ought 和have外，后面只能接不带to的不定式。

情态动词不随人称的变化而变化，即情态动词的第三人称单数不加-s。情态动词不受任何时态影响即不加三单。情态动词没有非谓语形式，即没有不定式、分词等形式。

参考资料来源：百度百科-英语语法

就是说你认为自己看到的正前方，和实际有偏差，简单点就是轻度斜视！

Hi, I believe youre studing CFA I. LOL.....

Bias created by the use of information or data in a study or simulation that would not have been known or available during the period being analyzed. This will usually lead to inaccurate results in the study or simulation.

example:
if an investor is backtesting the performance of a trading strategy, it is vital that he or she only uses information that would have been available at the time of the trade. For example, if a trade is simulated based on information that was not available at the time of the trade - such as a quarterly earnings number that was released three months later - it will diminish the accuracy of the trade's true performance.

bias是什么意思 bias ['ba s] [词典释义]n. 1. 偏见,成见;偏心 2. 倾向,趋势;偏爱 3. 斜线,斜纹 4. 【电】偏压 a. 1. 斜的;斜纹的

水准仪的视读误差