电磁场

Effects of sinusoidally PEMFs with different frequencies on proliferation of osteoblasts.

不同频率的正弦波电磁场对成骨细胞增殖的作用。

With the increase of exposure intensity and time,the Bax and Bcl2 exprseeion in spermatogenic cells in rats were gradually decreased.

随着电磁场暴露频率的升高和时间的延长，大鼠生精细胞Bax的表达明显上调，Bcl-2的表达逐渐下调。

Objective To study the effect of extremely low frequency electromagnetic fields on Bax and Bcl2 expression in the spermatogenic cells of rats.

目的 探讨极低频电磁场对大鼠生精细胞凋亡相关基因Bax和Bcl-2表达的影响。

This paper presents an analysis through theoretical computation on the electrical parameters of three-core brindle insulation conductors, and through the methods of the design of conventional aerial lines and magnetic field theory. The reactance and susceptance of the new wire materials are 0.23 and 9 times as ouch as that of the conventional ones respectively.

应用电磁场理论和电力架空线路设计的理论，针对三芯绝缘导线束进行电气参数理论计算和分析，结果表明：与常规裸导线相比，其电抗和电纳分别为0.23倍和10倍。

Tollefsen Jarle. New capacitance sensor principles in flow measurements.

李元清。有限元分析及其在电磁场计算中的应用。

The experimental results are as follows:(1) Without EAF the fouling resistance increase along with addition of time and change of the heat transfer coefficient is just contrary to the result. However, with EAF fouling resistance still enhances at the beginning of experiment and later, it gradually minishes after experiment has started for some time. Of course, the change of heat transfer coefficient still is contrary to the outcome. But when experiment lasts longer time, fouling resistance and heat transfer coefficient change in the same trend as the fore results at the beginning of the experiment. However, They all go to the tranquilization until the last.

实验结果表明：(1)没有经过电磁处理时，污垢热阻随着时间的增加而增加，换热系数随着时间的增加而减小；一旦经过电磁场的处理，污垢热阻开始时仍呈上升趋势，经过一段时间以后，便逐渐下降，换热系数的变化与此正好相反，即在实验开始时呈下降趋势，后来逐渐上升；当实验时间延长时，发现污垢热阻及换热系数在实验开始时的变化趋势与前面的实验结果基本相同，但到后来，二者的数值则分别均趋于稳定。

This paper puts forward an improved Curtice model, by modify drain-source current I ds and breakout volage V p of GaAs MESFET tube on the basis of Curtice semiexpirical model, and uses fast simulated annealing algorithm to resolve it.

从模型的建立方法来看，现有GaAsMESFET非线性模型大致分为 3种类型：(1)最值模型[1] 这种模型从求解GaAsMESFET的二维或三维电磁场方程出发，用数值计算算出MESFET的非线性特性。

Vast theoretic and experimental research for the WEM application has been done in our country. For example, the calculation of electromagnetic field produced by the high-power transmitter, the receiving of signals transmitted from different distances, the probing for deep structure of the oil field etc.

国内对WEM法的应用已做了大量的理论和实际试验工作，例如，大功率发射台辐射的电磁场计算，不同距离电磁信号发射接收试验，油田深部结构探测试验等。

In this article , we study effects of extremely low frequency electromagnetic field on apoptosis of tumor cells in vitro.

本文探讨极低频率电磁场对体外培养肿瘤细胞的抑制作用。

Sinusoidal magnetisation ; magnetostriction ; ferromagnetic materials ; vibrations ; mathematical model

正弦电磁场；铁磁材料；磁致伸缩；振动；数学模型

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。