level curve meaning in Chinese
level curve ＝ contour line.
Examples
- Compared c13 & o18 isotope analysis curve with lake level curve , further analyzed palaeoenvironment
通过分析、对比碳氧同位素曲线与湖平面升降曲线，对古沉积环境的变化规律有了进一步的认识。 - Both the annual banding growth rate curve and grey level curve show the evolution processes of the precipitation over the past 2000 years this region and that divide into seven dry / wet cycles
石笋纹层厚度和灰度曲线比较清晰地揭示了本区过去2000年降水演化过程，可划分7个干湿旋回。 - By comparing i8o curve with annual growth rate and grey level curve in the stalagmite during the same period , the author brings forward that that climate in shennongjia region mostly embodies matching modes of warm / wet , cold / dry over the past 2000 years , but temperature was out of harmony with precipitation in the course of climate transforming , which shows that shennongjia climate embodies matching modes of cold / wet , warm / dry at part period of time
近2000年中17次太阳活动和1400aad以来29次火山活动对气候变化影响的印迹在石笋氧同位素中都有明显的记录，表明气候事件与太阳活动、火山活动有较好的相关性。石笋各代用指标谱分析显示126a 、 100a 、 81a 、 60a 、 40a 、 22a 、 11a等周期成分，也进一步支持了太阳活动对季风区短尺度气候变化的驱动作用。 - Firstly , the status of our nation ' s water resources , flood and arid hazards is overviewed to illustrate the necessity for study on dynamic control of flood season limited water level . disadvantages in traditional limitsd water level design , static control of limited water level design , static control of limited water level and fuzzy limited water level curve are pointed out , and mending methods for these are introduced . dynamic control and its key problems are analyzed hi next section . the allowable range of limited water level is determined , so as the allowable extreme risk index . the definition of extreme risk is re - illustrated , risk analysis methods in reservoir operation is discussed either . according to the definition of extreme risk rate , the allowable extreme risk rate of reservoir is systematically demonstrated with variant extreme risk indexes and flood season limited water level
本文首先阐述了我国水资源状况和水旱灾害、说明水库汛期限制水位动态控制研究的必要性；介绍了传统汛限水位设计、汛限水位静态控制、模糊汛限水位过程线存在的问题及其初步改进方法；分析汛期限制水位动态控制的方法及关键问题；进一步阐述了水库极限风险率的定义；根据极限风险率定义，详细叙述了不同极限风险指标时、不同汛期限制水位下起调，水库所能承受的极限风险率计算方法。然后，基于极限风险率计算方法，以白石水库为背景，研究“考虑坝体自身安全、考虑坝体安全与下游防护对象控制下泄流量的汛限水位动态控制的极限风险率” 。