稚贝足丝的分泌，具有明显的日周期性变化，昼夜差异极显著。
The secrete of young shellfish foot-thread has the obvious sun periodicity change, the difference of its day and night is marked.
鉴于时负荷的日周期性及周周期性，基于灰色系统理论，提出一种周期比值灰色预测模型，对未来24小时负荷进行预测。
In view of weekly periodicity and daily periodicity of hourly load, a periodic ratio grey model for hourly load forecasting has been set up with grey system theory.
有一些流量趋势是周期性的，比如，工作日的流量比周末的流量大，或者是夏天月份的流量比其他季节流量低。
Some traffic trends are cyclical, e.g. there is more traffic during the week than the weekend or the summer months are slower than non-summer months.
这种震动以前被诟病为60年周期性日长变化的原因，但该研究发现的自转速度表明，它并不是罪魁祸首，英国利兹大学的乔恩芒德说。
The twisting had previously been blamed for a 60-year cycle in day length, but the rate of rotation found in this study suggests it is not the culprit, says Jon Mound at the University of Leeds, UK.
目的：揭示脑出血发病时间的季节周期性和日变化规律。
Objective: To explore the seasonal and circadian variation in the timing of cerebral hemorrhage.
光合作用的日变化与内部生理状态的周期性变化有关。
The daily changes of photosynthetic rate is associated with the cyclic alterations of internal physiological periods.
结果：空床数、占床比、在院者平均住院日具有明显的周期性变化，以周历为一个周期。
Result: Number of the vacant bed, the occupancy ratio of the bed, average inpatient day have the periodical change, one week is a cycle.
如果你使用一个财年变式，你就得定义一个日历，把（日历中）每个期间的第一天规定为工作日，并把它用在周期性限制中。
If you are using a fiscal year variant you'd have to define a calendar with only the first day of each period defined as workingday and use it in the periodicity restrictions.
如果你使用一个财年变式，你就得定义一个日历，把（日历中）每个期间的第一天规定为工作日，并把它用在周期性限制中。
If you are using a fiscal year variant you'd have to define a calendar with only the first day of each period defined as workingday and use it in the periodicity restrictions.
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