基准周期

在每个基准周期中随时归零的脉冲。

A pulse that ends any time during a reference cycle .

应用功率谱分析的方法，提取出同时段百年尺度和千年尺度的古季风周期，其中71a周期为本文首次提出，并被认为是东亚季风活动最显著的基准周期之一。

Using power spectral analysis , centennial and millennial-scale cycles of Paleo-monsoon were extracted . In the cycles , 71 a is the basic cycle of East Asian Monsoon .

基于静态PPP技术解算了区域CORS的坐标时间序列，在区域空间滤波的基础上，分析了GPS基准站的周期特性和噪声特性。

Based on the static PPP , time series of regional CORS are solved . After regional spatial filtering , periodic and noise characteristics of GPS base stations are analyzed .

在桥梁的设计基准期（生命周期）内，如何合理地选择维修方案，就有着相当重要的现实意义。

How to choose repair plan reasonably in the lifetime of bridges will be critical .

这是判断和选择优势产业的首要标准。它包括竞争力基准、产业生命力周期基准、生产力上升基准和需求弹性基准。

A kind of datum has competitive power datum , the industrial vitality cycle datum , the productive forces rise datum and the elasticity of demand datum .

时间维是地价动态监测的结果体现，是在基期、基准日和监测周期的基础上监测所得的监测点及市场交易样点地价、地价指数和基准地价的时间序列。

The time dimensionality is results representation of monitoring system , is a temporal series of monitoring point land price , land price index and datum land price , that all base on land price dynamic monitoring .