Inactive people should start with small amounts of physical activity and gradually increase duration, frequency and intensity over time. 缺乏活动的人在开始时应做少量的身体活动,并随时间逐步增加活动时间、频率和强度。
We used a Mega Hz focused transducer to focus on the surface of the calculus model and tried different frequency, intensity, time and duty cycle. 本文利用兆赫兹频率级别的聚焦超声换能器诱发冲击波作用于结石模型材料,采用不同的声波参数包括频率、强度、占空比等进行了实验。
Scientists also need to improve how they predict cyclone frequency and intensity over long time scales. 科学家们还需要对长时间预测飓风频率以及强度的方法做出改进。
Parameters such as frequency, intensity and pretreatment time of ultrasound are varied. 讨论了声场参数,即频率、声强、超声辐射时间对该过程的影响。
The three-dimensional sound graph may show the relations among time 、 frequency and intensity, which can be selected to show in color or monochrome mode. A movable cursor is set up to select and show two-dimensional analysis graph of frequency and intensity at some time arbitrarily. 三维声图可显示时间、频率与声强的关系,可以选择彩色或灰度显示,并设一可移动光标,可任选显示某时刻频率与声强二维分析图。