primary cycle

Power Source of AC Primary Side Intermitting Supply by Cycle Control

周波控制交流一次侧间歇供电电源

What's more, the primary factor affecting financial safety is business cycle.

影响金融安全的首要因素是经济周期.

This paper briefly introduces the grading of Qingshuihe Test Section on Qinghai-Xizang Railway and the diseases of the subgrade occurred after one freeze-thaw cycle, makes primary analysis on existing problems, and puts forward some methods for the grading in the permafrost zones on continental plateau.

简要介绍了青藏铁路试验段路基的施工过程，及一个冻融周期后路基所出现的病害，对所存在的问题进行了初步分析，并提出了高原冻土地区路基施工的一些方法。

The Primary Research on Life Cycle Cost Estimate of Space Equipment

航天装备全寿命费用估算方法初探

Ocean primary productivity ( OPP) controls the exchange of carbon dioxide at the air – sea interface and plays an important role in the global carbon cycle and climate change.

海洋初级生产力（OPP）在全球碳循环中起着重要作用，在相当程度上控制着海–气界面CO2的交换，是全球变化研究中的重要内容。

Longer duty cycle the same output power results in lower peak currents the primary side.

更大的占空比实现同样的输出功率可以使用更低的一次侧峰值电流.

By adopting auxiliary transformer in the primary side of main transformer, the decreasing time of free-wheeling current is independent of duty cycle, which is proportion to the peak current in the primary side of main transformer.

采用原边辅助变压器衰减原边环流电流所需的时间不受占空比影响，而与原边峰值电流成正比。

As an important component of the ocean carbon cycle, particulate organic carbon ( POC) is often used to estimate the primary productivity in the ocean: There are two main aspects in our study.

海洋中的颗粒有机碳（POC）作为碳循环的重要组成部分，可以用来估计海洋初级生产力水平。

The primary enterprise in charge of product development is responsible for the whole course of product development, the assignment of task, coordination and proceeding control in the product life cycle.

这些企业一般是各自独立的联盟企业，由主开发企业负责产品开发全过程及产品整个生命周期的任务分发、工作直辖市、进度控制等工作。

In the same of average power, peak power and duty cycle constant, pulse width is the primary parameter which affects the kerf width.

在相同的平均功率、峰值功率和脉宽比下，脉冲宽度是影响切缝宽度主要参数。