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- frequency variation curve 频率变化曲线
- Impact in power frequency variation. 频率变化之影响。
- Meanwhile, the variation curve of the theoretical construction cambers in the nodes of the bridge girders is compared and repeatedly corrected. 算出主梁各节点理论施工预拱度变化曲线等数据并与实测值进行比较,反复修正。
- The prophase variation curve of proportion of tracheid appeared as "Trapezoid" and the latter variation curve appeared as "V" from pith to outward. 树脂道比量由髓心向外,开始缓慢下降,然后迅速上升达最大值后又迅速下降。
- Frequency variation process and unit's swing process after fault can be closely simulated. 故障后的频率变化和机组摆动过程可确切地仿真。
- The diurnal variation curve of net photosynthetic rate had two peaks under 0% and 15% shading treatments,while there was only one peak under 35%and 50% shading treatments. 全光照和遮光15%25处理条件下,Pn日变化呈双峰曲线,而35%25和50%25处理条件下呈单峰曲线;
- Digital filtering technique based on least square method, multichannel sampling technique and frequency variation sampling technique were used experimentally. 实验应用了基于最小二乘法的数字滤波技术、多通道采样技术、变频率采样技术。
- In the second design, we use an adaptive biasing circuit to compensate for process and temperature deviation.Even in the worst case, the frequency variation is under 5%. 在第二个设计中,我们使用一个适应性偏压电路去补偿制程跟温度造成的频率漂移,即使在最差的条件下,频率漂移还是可以维持在5%25以内。
- It is a therma sensitive stage on spring phenophase. (4) The temporal variation curve of spring phenophase in Beijing shows that at present spring phenophase in Beijing appears earlier. (4)近50年来,北京春季物候经历了3个周期的早晚振荡,近十几年来北京春季物候持续偏早,特别是近10年,其偏早天数创历史记录,这与北京近年持续的暖冬相一致。
- Speed control by frequency variation 变频调速
- relative frequency variation rate 相对频率变差率
- scheme of stator frequency variation 定子变频方案
- Speed Regulation by Frequency Variation 变频调速
- Power conditioning is used to minimize voltage and frequency variations in an external power. 电源调节用来最小化外部电源的电压变化和频率变化。
- The frequency variation at the change of input speed 输入转速变化时的频率变化
- technology of speed regulation by frequency variation 变频调速技术
- The correlation between frequency variations of enzyme bands and tree height, DBH and volume was very small. Only B45 band came up to or closed significant level. 酶带频率变异与树高、胸径、材积生长相关性很小,只有B_(45)酶带与生长相关达到或近于显著水平。
- He varied the transmission frequency. 他变换了无线电传送的频率。
- Research on steady-state overreach of power frequency variation distance relay 工频突变量距离继电器稳态超越的研究
- Keywords Speed control by frequency variation mine fanner energy-saving; 变频调速;矿用通风机;节能;