Risk can be defined as the difference of the real and forecasted result from the point of predictability, and can be measured by the noise of return series.
从可预测性的角度将风险定义为实际与预测结果的偏差，并利用收益序列的噪声对其进行度量。
City observatory is forecasted, double rest day of nightly low temperature drop in pairs broken freezing point, next week fine and windy, the citizen should notice to add garment heat preservation.
市气象台预报，双休日夜间低温将双双跌破冰点，下周晴朗多风，市民要注意添衣保暖。
A new measurement model is derived to directly connect the image features of vanishing point and base point, and it's applications are forecasted.
通过运动物体的变量直接把没影点与基点的影像特征相联系，建立一种新的测量运动物体的数学模型，并对该模型的应用作了展望。
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