1) Key pipe
关键管段
2) key area
关键地段
1.
Recognition and analysis of the key area for ecological security is an important link in the regional pattern for ecological security designing.
生态安全关键地段的识别与分析是区域生态安全格局设计中的重要环节。
3) essential navigation section
关键航段
1.
It discusses and researches the river-sea direct link ship handling skills of essential navigation sections from how to pass a curving section of river,a bridge and an estuary.
通过对江海直达船舶的操纵性分析,从过弯曲河段航法、过桥航法、入海河口的航法三方面对关键航段江海直达船舶驾驶技术进行了探讨与研究。
4) key frequency band
关键频段
1.
Firstly, the UDWT is adopted for signal frequency analysis to determine the key frequency bands containing fault information; then, correlation dimension analysis of effective sub-waves is performed, and the correlation dimension threshold criterion is set up in sensi.
该方法首先采用UDWT对振动波形进行分频,并确定含缺陷信息的关键频段;再对有效子波实施关联维分析,在敏感尺度区间内设立关联维阈值判据,进行缺陷检测。
5) key time
关键时段
1.
The key surface meteorological factors,the atmospheric circulation characteristic factors and key time to influence the happening and spreading of wheat powdery mildew were selected in terms of correlation analysis.
以商丘市1995-2005年的小麦白粉病发病面积、地面气象资料和大气环流特征量为依据,利用相关系数法进行因子普查,筛选出了影响商丘市小麦白粉病发生和流行的主要地面气象因子和大气环流特征因子及其关键时段,并利用多元线性回归方法建立了数学预测模型,模型历史拟合准确率为95。
补充资料：管段
分段管理的地段：这一～的治安状况良好。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条