选择器

Medicated T-IUD and MCu function IUD can prevent ectopia possibly.

选择合适的IUD类型和型号，已绝经的妇女应及时取器，哺乳期妇女置器慎用有臂的IUD，如T形IUD和MCu功能性IUD等，可预防IUD异位。

Suitable type and pattenn should be selected,the IUD in menopausal women should be taken out of in time.To place IUD in womb of lactational women should be carefully.Medicated T-IUD and MCu function IUD can prevent ectopia possibly.

选择合适的IUD类型和型号，已绝经的妇女应及时取器，哺乳期妇女寘器慎用有臂的IUD，博士论文 lunwenxlx论文订制流程，如T形IUD和MCu功能性IUD等，可预防IUD异位。

This paper discusses a method, which can be used to approximately calculate the equivalent resistance and to approximately calculate the efficiency of different topologies. It could benefit a lot in designing DC-DC converters.

本文提出了一种近似计算等效电阻的方法，其原理是将变换器中各元件的损耗之和等效为输出电阻的损耗，可以简便计算变换器的效率，有助于选择合适的电路。

The paper presents an account of selection of frequency changer used for feeding pump of dense medium cyclone , effect of function of the frequency changer and the problems identified in its application.

介绍了重介质旋流器给料泵变频器的选择、控制功能的实现以及应用中的几个问题，说明了变频调速技术的优势和应用潜

The thesis focuses on the circuit design and parameter selection, including the power circuit, control circuit and drive circuit of the front-end converter. Apart from that, for the load-end converter, the design and critical components selection of the traditional full-wave rectification and synchronous rectification are presented.

本文设计和确定电路的各种参数，包括前端变换器的功率电路、控制电路和驱动电路，对于负载变换器则给出了普通全波整流和同步整流的滤波器设计和一些关键器件的选择。

In this paper,the performance of various infrared implements is analyzed in details,the selection principle of infrared heat reservoir is put forward,and the conclusion that the fair-infrared directional radiation implements are most effective is drawn.

分析了各种红外辐射器的性能，提出了红外线热源的选择原则，得出了远红外定向辐射器为节能效果最好的红外热源的结论。

Signal processing based on vector hydrophone is the main content of the thesis, which has academic and engineering significance.

本论文选择单矢量水听器信号处理作为研究对象，讨论单矢量水听器在信号检测和方位估计中的性能，具有一定的理论和工程意义。

The next two bits (R1 and R0) select one of the four registers that is to be acted upon when a register oriented instruction is issued.

接下来的2位（R1和R0）选择4个寄存器，是一个必须采取行动时发出指令寄存器导向。

Through analysis to multilevel invertor a method of switching angle control for Diode-clamping Multilevel Inverter is introduced. The quantity of wave for output voltage is improved and the content of harmonics is reduced. And a design is carried on to realize the control mode based on TMS320F2407DSP.

通过分析多电平逆变器的拓扑结构，选择二极管箝位型多电平逆变器为研究对象，提出在二极管箝位型逆变电路中实现开关角控制的方法，该方法减少了谐波的含量，改善了输出电压的波形，并以TMS320F2407DSP为平台进行了设计实现了该控制策略。

According to the evaporation equation, the evaporation degree of aerosol particles reaching ICP can be simulated, then we can get the value of useful mass transport rate, Wu, which is difficult to be gotten from experiment and can be used to assess the analytical performance and to optimize the operating parameters, such as solution and gas flow rate and the configurations of the nebulizer.

根据蒸发方程，可以模拟进入ICP的气溶胶粒子蒸发的程度，从而计算出实验上很难测定的有用质量传输速率Wu。本文通过Monte Carlo方法模拟了不同浓度的溶液、不同溶剂以及不同的载气流量、进样速度和雾化器的结构尺寸等变化对Wu的影响情况，并与实验结果进行比较，证明了模拟结果的可靠性，并依此选择最佳操作条件和雾化器的结构尺寸。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。