高频

Comparison on fretting behavior was made between films formed by single corrosive gas simulation and natural films covered on silver plating and phosphor bronze surfaces.

本论文通过对多种触点材料在上海15个月室内自然暴露形成的腐蚀膜层形貌、成分及其微动电接触特性和高频传输特性的分析，了解国内环境污染对不同触。。。

According to the characteristic of this model,a method of detecting the weak photocurrent signal using cross correlation method is given,and the simulated experiment circuit realizing this ranging method is designed.

根据该测距模型的特点，提出了运用互相关法检测高频振动产生的微弱光电流的方法，并设计了模拟实验电路。

The large signal and small signal SPICE circuit models of HBT and high-frequency model of PIN photodetector have been constructed.

建立了HBT的大信号与小信号SPICE电路模型以及PIN探测器的高频模型。

According to the product distribution of microwave-assisted photooxidation of acetaldehyde, the mechanism for MW-assisted photocatalysis was proposed.

采用高频微波与紫外光耦合，发现微波辐射对光催化反应过程效率主要是受"非热效应"，而非"热效应"的影响，并探讨了作用机制。

The effects of FC were abolished by intrathecal administration of kynurenic acid (50 nmol) or 2-amino-5-phosphonovaleric acid (AP-5, 0.5 nmol), but not by 6, 7-dinitroquinoxaline-2, 3-dione (DNQX, 5 nmol), picrotoxin (5 nmol) or strychnine (1 nmol).

，高频刺激前0.5小时鞘内注射特异性NMDA受体拮抗剂AP-5（0.5 nmol）或非选择性谷氨酸受体拮抗剂犬尿酸（50 nmol），FC的效应被阻断；non-NMDA受体拮抗剂DNQX（5 nmol）不能阻断FC的效应；〓（5 nmol）和甘氨酸受体（1 nmol）拮抗剂对FC的效应也无明显影响。

The inention relates to a radio wave absorber which can achieve low cost, a small transportation volume, an excellent radio wave absorbing characteristic from a low frequency to a high frequency with a short length, a small or no difference in the characteristic of a polarization plane, and can be easily fabricated and worked.

本发明涉及一种电波吸收件、电波吸收体及其制造方法、以及电波暗室，用于实现下述的电波吸收体，其成本低、输送体积小、长度短、从低频到高频能获得良好的电波吸收特性，没有极化面特性差或该极化面特性差较小、重量轻、结构强度高、制造和施工容易。

A revised plane wave expansion method for calculating the band structure of photonic crystals is presented.

采用一种改进的平面波展开法，运用一种有效的设计二维各向异性光子晶体的方法，在低频和高频区域内获得了具有较大禁带的两种二维光子晶体。

Keep the signal source plug away from strong electricity to prevent breakdown of the high-frequency tuner!!

严防信号源接头触及强电击穿高频头！！

And thus,the wavelet analysis has developed due to this demand, This thesis is to detect the point of signal discontinuity by wavelet transform.

小波分析正是由于这种需求而发展起来的通过小波变换来精确地检测信号发生变化的时刻，构造一个信号模型，由一个低频正弦波信号连接一个高频正弦波信号，利用小波工具可以检测出信号发生不连续的间断点的位置。

Based on the principle of PEC, surface cracks mainly affect the high frequency components and subsurface crack mainly affect the low frequency components, so the PEC signals can be analyzed in frequency domain, which can eliminate the influence of noises during measurement. A method of frequency spectrum separating point is proposed for flaw classification, which enhances the accuracy in classification of defects. The agreement between theory and experiment shows that the present method is valid and applicable.

通过对脉冲涡流的理论分析发现，表面裂纹主要影响脉冲频谱中的高频成分，而表面下裂纹主要影响脉冲频谱中的低频成分，因此可以将时域中易受噪声影响的脉冲涡流信号变换到频域分析，提出了"频谱分离点"的方法来对裂纹进行分类识别，提高了缺陷分类识别的正确率，理论分析和实验结果相一致，证明了该方法的正确性和有效性。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！