Objective:To investigate the antitumor effect of Low-Frequency Pulse Forcusd Ultrasound(LFPFU) exposure in human cell line COC1, and to clarify its probable mechanism.
目的 ：研究低频脉冲聚焦 超声波对人卵巢癌细胞株COC1的抗肿瘤作用 ，并探讨其诱导细胞凋亡的分子机制。
The detection probability calculating method about low pulse repetition frequency(LPRF) PD radar against air vehicle is studied.
提出了低脉冲重复频率（LPRF）PD雷达探测飞行器目标的发现概率计算方法。
The blood flow frequency imaging of peritrophoblastic artery flowing was searching by pulse Doppler, it was high extending flow and low resistance.
用彩色能量图显示低速血流，用脉冲多普勒寻找高舒张期低阻力滋养动脉血流频谱。
It will give patients treatment by means of the amplified amplitude modulating wave current that can be obtained form medium frequency amplitude modulated by the low frequency pulse signal.
它将有关低频脉冲信号对中频调幅后，利用被放大的调幅波电流对人体进行治疗。
The errors happening when the blast pulse signals pass the low pass filter system are obtained. It gives the basis for selecting the frequency respond range of the measurement system.
用试验的方法对爆炸脉冲信号区过低系统时带来的误差进行测定，为商量系统频响范围选取提供依据。
Wider pulse width, low pulse frequency and medium peak power should be used when pulse laser welds magnesium Alloy.
脉冲激光焊接镁合金时应遵循较大脉宽、低频率、中等峰值功率的原则。
The PP-IP characteristics at low frequency high pulse current and the emission spectra at direct current have been investigated and analyzed.
研究和分析了它们在低频大电流脉冲注入下的Pp—Ip特性和直流注入下的光谱特性。
This dissertation studies the ground clutter suppression of ABSR. Because low pulse repetition frequency (LPRF) and low side-lobe antennaare adopted, we focus on main-lobe clutter suppression.
本文主要研究机载战场侦察雷达的地杂波抑制，由于采用了低脉冲重复频率和低副瓣天线，我们主要考虑主杂波的抑制。
This paper introduces the structure and principle of a novel low-frequency electronic pulse therapeutic apparatus.
介绍了一种新型低频脉冲治疗仪的基本结构、工作原理。
The early fault signal is very faint, low frequency appears more to pulse, easy to be interfered by the ambient noise even submerged.
早期故障信号非常微弱，多呈现低频脉动，容易受到噪声干扰甚至被环境噪声所淹没。
Results: Most autonomous discharge of the normal spinal cord neurons was regularly a single pulse with low frequency.
结果：正常脊髓神经元的自发单位放电多是一个低频的单发脉冲活动。
Conclusions: Stimulating the hippocampus or amygdala by low frequency and short intervals electric pulse could establish rapidly stable animal model for epilepsy.
结论：应用低频短间隔电脉冲刺激大鼠海马或杏仁核可快速建立稳固的动物癫癎模型。
Experimental results show that low frequency pulse compression and channel match method can be used in shallow water sound channel to improve the SNR.
实验表明，脉冲压缩可有效增加浅海低频声脉冲的传输距离，信道匹配可用于消除多途对脉冲信号检测信噪比的影响。
In a second sub-mode ('low output power sub-mode'), VOUT is regulated using pulse width modulation, but the converter switching frequency is fixed at a first frequency.
在第二子模式（“低输出功率子模式”）中，使用脉冲宽度调制来调节VOUT，但转换器开关频率固定在第一频率。
Thirdly, the TEM horn antenna which is used to receive pulse signal is designed in this part. For the low limited frequency, the TEM horn antenna is mainly designed to make it miniature.
再次，设计了用于脉冲接收的TEM喇叭天线，由于要求的下限频率较低，所以重点对TEM喇叭天线进行了小型化的设计；
This sensor featuring plane-convex lens collimator for expanding beam and coupling, and a low frequency for light pulse modulation is introduced.
利用平-凸透镜准直器作扩束耦合光学系统，采用低频斩光器实现光调制。
Use single stage version to reach the temperature of 20 K is a difficulty for high frequency pulse tube cooler (PTC). Multi-stage version is a popular method to reach the low temperature.
单级高频脉冲管制冷机直接降低到20K以下温区存在很大困难，采用多级方案是高频脉冲管制冷机获得更低温度的主要方法。
The invention provides a healthy physical therapy chip module as an implementing method of the low-frequency modulation pulse physical therapy.
本发明提供一种健康理疗芯片模块，作为低频调制脉冲理疗技术的一种实 现手段。
The low jitter transmission of pulse signals is realized by direct RF-modulation based on PLL frequency modulation.
介绍了锁相调频的基本原理，用锁相调频的射频直接调制方法实现了脉冲信号的低抖动传输。
This makes achieving negative permeability under extremely low frequency as well as the permeability switching between positive and negative value rapidly through a magnetic field pulse into possible.
这使实现极低频的负磁导率以及通过磁场脉冲实现磁导率在正负之间快速跳变成为可能。
When we developed that model, we were quite surprised of the consistency of this model, especially at the low frequency end where one finds most of the power of the pulse.
当我们设计出这种模型时，我们非常惊奇于这种模型的一致性，特别是在低频端发现了脉搏最有力的部分。
The invention relates to a laser spot collector with low frequency and narrow pulse for a laser transmitter.
本发明涉及一种激光发射机用低频窄脉冲激光光斑采集器。
The results show that this amplifier has a good amplification effect on the pulse signal at a low repetition frequency.
结果表明，本脉冲光纤放大器对低频脉冲信号有很好的放大效果。
The results show that this amplifier has a good amplification effect on the pulse signal at a low repetition frequency.
结果表明，本脉冲光纤放大器对低频脉冲信号有很好的放大效果。
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