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- extreme low frequency signal 低频信号
- The match strobe gate is presented to improve the measurement precision of low frequency signal. 文中提出使用匹配选通门提高低频信号频率测量精度。
- WHY THE USE OF SUCH EXTREM LOW FREQUENCIES FOR COMMUNICATION WITH SUBMARINES? 为什么要将极低频无线电用于潜艇通信?
- Maritime and aviation navigation systems use low frequency signals to locate vessels or aircraft. 航海和航空界的导航系统使用低频率讯号来测量船只或飞机的位置。
- The biological effect of extremely low frequency(ELF)electromagnetic field on human body is a question in dispute. 极低频电磁场是否对人体或生物存在不良影响 ,一直是学者们争议的课题。
- Objective To explore the relationship between extremely low frequency (ELF) magnetic fields and carcinogenesis. 目的 探讨极低频 (ELF)磁场可能存在的促癌或协同促癌作用。
- Note: Fast gating of sustained low frequency signals can result in “chattering. 注意：对相同的低频信号，设置噪声门过快会导致“喘息声”。
- A semi-automatic extremely low frequency (ELF) field-strength meter calibration system has been established by author. 作者建立了一个场强到140kV/m的半自动极低频(ELF)场强自动校准系统。
- Highly accurate detection of feeble and low frequency signals become realizable with the PWM sensing technique. 采用PWM检测技术，使微弱、低频信号的高精度检测成为现实。
- Dynamic characteristics of the portal frame are also identified from the WPT of low frequency signals. 低频的部分则可以进行门形构架的系统识别。
- Ultra low frequency signal generator 超低频信号发生器
- Extremely low frequency (ELF) fields (>0 to 300 Hz) are one kind ofelectromagnetic fields, which are common used in people?s daily life. 极低频电磁场（extremely low frequency electromagnetic fields，ELF-EMF）是指频率在0-300Hz之间的电磁场，是与人们日常生活关系最为密切的电磁场之一。
- The magnetic fields with frequency of 100 Hz and intensity up to 100 gausses are known as the field magnetic extremely low frequency (ELF). 频率在100Hz;强度最高达100高斯的磁场被称为超低频磁场(Extremely Low frequency;ELF);它对于细胞膜有着特殊的影响;能够改变细胞膜两侧的离子分布;从而在某些创伤或是变性的组织产生的炎症反应中表现出治疗效应.
- Test methods for low frequency signal generators 低频信号发生器测试方法
- Results showed that the spectra in frequency domain could be divided into two parts: high frequency and low frequency signals. 结果表明，测量光谱在频域中的信号可被分为两部分：即低频信号和高频信号。
- Objective To explore the molecular mechanism of suppression of gap junctional intercellular communication(GJIC) by extremely low frequency(ELF) magnetic fields. 目的 研究极低频 (ELF)磁场抑制细胞间隙连接通讯 (GJIC)的分子机制。
- Objective To observe the effects of exposure to extremely low frequency electromagnetic fields (ELF EMFs) on pregnant mice and development of offsprings. 目的研究极低频电磁场(ELF EMFs)暴露对孕鼠妊娠和子代生长发育的影响。
- According to the technology of direct digital synthesis(DDS),a kind of low frequence signal source was introduced based on the Complex Programmed Logical Device(CPLD)and Single Chip Micyoco(SCM). 介绍了一种应用直接数字频率综合器(DDS)技术,基于可编程逻辑器件(CPLD)和单片机设计的低频信号源。
- Objective To study the effect of extremely low frequency electromagnetic fields(ELF EMFs)on the anti-oxidation system and lipid peroxidation mechanism of rats. 目的研究极低频电磁场对大鼠脑组织抗氧化系统的影响及其机制。
- Objective To study the effects of extremely low frequency electromagnetic field(ELF EMF) and its combination with lead on the antioxidant system in mouse brain and liver tissues. 目的 研究极低频电磁场及其与铅的联合作用对小鼠脑和肝脏抗氧化系统的影响。
