fundamental adj. 1.基础的,基本的,根本的,重要的;原始的,主要的。 2.【物理学】基频的,基谐波的;【音乐】基音的。 a fundamental change 根本变化。 a fundamental function 【数学】特征函数。 a fundamental law 根本法则,基本定律;基本法。 a fundamental rule 基本原则。 n. 1.原理,原则,基本,根本,基础。 2.【音乐】基音;【物理学】基频,基谐波。 n. -ism 【宗教】原教旨主义〔相信《圣经》所说的事情都是真实的,并认为这一点对基督教来说是最基本的〕。 -ist n. 原教旨主义者。 adj. 原教旨主义的。 adv. -ly
However , a large amount of harmonic is generated in the power network when the electrified railroads loads consume fundamental frequency electric power . these harmonics make bad effect on the operation of protection relays and the precision of electricity measures , worsen the power quality and threaten the security of traction substations as well as other equipments in power system 但是电气化铁道从电网取得工频能量的同时,向电网注入了大量的高次谐波电流,降低了供电质量,影响了继电保护的正确动作和电气量测量的精度,威胁牵引变电所的安全运行及电网中其他用电设备正常工作。
The main work of this thesis includes : 1 . using energy theory , the cable sag and bending stiffness effects are investigated on the determination of cable tension forces through cable ' s fundamental frequency . based on the curve fitting , the practical formulas are proposed where the cable tension can be easily estimated using measured fundamental frequency 本文的主要工作包括: 1 .考虑拉索的垂度和抗弯刚度对基频的影响,用能量的方法,并辅以曲线拟合,提出了由基频计算索力的实用公式,公式与理论解的误差在以内,并对公式的适用范围进行了讨论。
The fundamental frequency, often referred to simply as the fundamental, is defined as the lowest frequency of a periodic waveform. In terms of a superposition of sinusoids (e.