工频

The concentration of human chorionic gonadotropin and progesterone in the culture medium was detected by electrochemiluminescence immunoassay.

目的研究50Hz工频磁场对离体原代培养的人早孕绒毛滋养细胞分泌功能的影响，探索工频磁场生殖健康效应的可能机制。

Disturbing Voltage is estimated equivalently according to the measurement of the typical numerical values between the leakage voltage and leakage resistance from the equipment of the oscillograph and the millivoltmeter based on the working frequency disturbance model.

在工频干扰模型基础上，通过对示波器和毫伏表的电源变压器漏电阻和等效漏电压典型值的测量，估算了工频干扰电压的幅度，从而说明电子测量系统各设备间共地连接的必要性，并介绍了共地方式在交流电桥等实践中的应用实例。

According to principle of superposition in a linear system, the intelligent system could depress the interference to its 1/3-1/6 and the total effect was excellent.

根据线性电路叠加原理，该系统对工频干扰抑制的总能力可以将工频干扰降低为原来的1/3-1/6，取得了显著效果。

The detailed steady state process of OCC APF with both resistive load and nonlinear load is analyzed,based on which the physical meaning and steady condition of proportional part and integral part in PI controller are given.

在此基础上给出了 PI调节器中P和I环节的物理意义及其应满足的条件，发现可将其作用分开：I环节主导Um长期内较大的变动，用来反映负载大小的改变；P环节每个工频周期内对Um小范围调整，用来平衡每个工频周期内负载存在的谐波。

It was found that the predischarge type varies clearly with relative humidity as the results of the influence of relative humidity on the field distributions.

发现，由于相对湿度对工频电场分布的显著影响，两类试品的工频预放电类型极为明显地随相对湿度的变化而改变。

However, when the cells were exposed to combined MF which superposes a noise MF over 50Hz MF with equal intensity, the receptor clustering induced by 50Hz MF were inhibited.

结果表明单独0.4mT噪声磁场不诱导细胞膜受体的聚簇；而等强度的噪声磁场与工频磁场相互叠加后，噪声磁场能干预50Hz工频磁场对细胞膜受体聚簇的诱导作用。

This paper analyses principles for power frequency inductive furnace and power factor parallel compensation and three phases balance,deals with processes of power factor compensation and three phases balance for PLC automatic power inductive furnace.

文摘：分析了工频感应炉的工作原理、功率因数并联补偿原理和三相平衡原理。论述了PLC自动控制工频炉的功率因数补偿、三相平衡的过程。

The results suggest that the EGFR clustering induced by 50 Hz MF depends on intact lipid rafts on cellular membrane, and the ASM might participate in the process of EGER clustering.

工频磁场诱导FL细胞膜表面EGFR发生聚簇与脂筏结构密切相关，ASM有可能参与了工频磁场诱导的受体聚簇及/或信号转导过程。

This paper analyzes the influence of TCSC on the power frequency fault component protection including directional negative/zero sequence power relay, power frequency fault component distance relay, and directional power frequency fault component relay.

摘 要 分析了TCSC 对故障分量保护包括负序功率方向保护、工频故障分量距离保护及工频故障分量方向保护的影响，认为：与常规串联补偿线路上的保护相比，在TCSC线路上故障分量保护的性能不会降低。

The monitoring results of the power frequency electric field intensity, power frequency magnetic field intensity ,radio interference and noise of sensitivity areas near the representative transformer substations and power transmission lines are analyzed emphatically.

简单介绍了安徽电网的基本概况，重点分析了具有代表性变电站和输电线路附近敏感区域的工频电场强度、工频磁场强度、无线电干扰、噪声等，全面评价安徽电网环境状况，指出存在的问题，并提出了相应的建议。

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％。