1.The effects of pollen and plant growth stages on the populations of western flower thrips,Frankliniella occidentalis,were studied on two cultivars Impulse Orange and Cajun Carmine of impatiens.
在凤仙花的Impulse Orange和Cajun Carmine品种上开展了花粉和植物不同生长阶段对西花蓟马种群的影响。
2.In this paper,an FIR(Finite impulse response)multiband stop digital filter to reject the noise of 50 Hz and its har- monic waves from power network is designed,whose stop bands are respectively as 48Hz-52Hz、98Hz-102Hz、and 148Hz-152Hz.
本设计用 FIR(Finite Impulse Response)数字滤波原理设计一阻带范围分别为48-52Hz、98-102Hz、148-152Hz的三阻带数字滤波器,有效实现对电子测量系统中的工频 50Hz 及其二次谐波和三次谐波干扰的滤除。
3.The technology of FIR-Finite Impulse Response with window data filter and 256 count out DIT-Decimation in Time Raxid-on-2-FFT (Fast Fourier Transform arithmetic), which can fulfill detecting the voltage and current harmonics signals which can detect 50th harmonics.
对非稳态信号的检测，主要研究了基于改进的瞬时功率信号检测方法，利用MATLAB6.5对该检测方法建模，并对不同谐波信号进行仿真实验，结果表明，选择3阶切比雪夫Ⅱ型的IIR(Infinite Impulse Response)数字低通滤波器对检测非稳态信号中谐波信号的精度高。
4.Using nondestructive acoustic impulse-response technique to evaluate the quality of oranges,it was found that there were lots of factors affecting dominant impulse-response frequency,such as mass,density,pH value,firmness and sugar content. Furthermore,the relationship between these factors and dominant impulse-response frequency are non-linear and it is difficult to analyze the relationship between them using the conventional regression method.
用敲击振动的方法评价柑桔品质时,由于柑桔的质量、密度、坚实度、糖度以及pH等因素都影响敲击响应主频率,且各因素与响应主频率之间的关系呈非线性,用传统的方法难以分析两者之间的关系.
5.An impulse that, in a neutral circuit, causes the loop to open or causes absence of signal. In a polar circuit it causes the loop current to flow in a direction opposite to that for a mark impulse. A space impulse is equivalent to abinary zero.
在中性电路中，引起环路断开或造成信号消失的一种脉冲（信号）。在极性电路中，空号脉冲促使环路电流向传号脉冲相反的方向流动。空号脉冲相当于二进制零。
6.Had an impulse to run away; an impulse of regret that made me hesitate; bought a hat on impulse.
有一种跑开的冲动；突发的后悔之情令我犹豫不决；心血来潮买了一顶帽子
7.This paper presents the method of traceability and comparison of impulse voltage measurements based on the development of the impulse voltage techniques.It also analyzes that fhe calibration of measuring systems may be realized through comparisons of impulse voltage measurements.
根据冲击电压测量技术的发展,介绍冲击电压测量系统的溯源和比对方法,并说明其校准可通过与认可的标准测量系统进行相互比对来实现。
8.Each group was exposed to one of following impulse noise conditions, 163 dB SPL 10 impulses at 1/10s, 163 dB SPL 10 impulses at 1/90s, 163 dB SPL 10 impulses at 1/0.5s, 166 dB SPL 5 impulses at 1/90s and 172 dB SPL 1 impulse. The impulse noise had a duration of 0.1 ms.
各组分别暴露163dB10发1／10s，163dB10发1／90s，163dB10发1／0．5s，166dB5发1／90s和172dB1发的脉冲噪声。
9.A novel impulse identification method based Empirical Mode Decomposition(EMD)is proposed. With this method,the signal containing impulses is processed by EMD. According to definition of Intrinsic Mode Function(IMF),the impulse signal can not be decomposed as IMF,whereas it can be decomposed as impulse response.
提出一种基于经验模式分解(Empirical Mode Decom position,EMD)的冲击信号提取方法,利用该方法首先将含有周期性冲击的信号进行EMD分解,在分解后的高频段IMF中,存在着类似冲击响应信号的成分,这些成分是由原始信号中的周期性冲击引起的,通过包络解调方法,可以得到冲击响应信号出现的频率,该频率对应原信号中冲击信号出现的频率。
10.This paper introduces a kind of Surge Generator controlled by Programmable Logic Controller (PLC),Touch Panel and waveform data administrated by personal computer The system can provide impulse current of 8/20μs from 2kA to 100kA ,impulse voltage 1.2/50μs from 4kV to 40kV and impulse current of 10/350μs from 2kA to 20kA.
介绍一种由可编程控制器(PLC)、触摸屏控制和计算机进行管理的电涌发生器自动化测控系统。 此系统可产生2～100kA的8／20μs冲击电流波、4～40kV的1．2／50μs冲击电压波和 2～20kA的10／350μs的冲击电流波。
