查询词典 filter leaf

Said cigarette comprises a tobacco string wrapped in cirgarette paper, a double filter having a string-side part consisting of a tissue paper containing carbon, and a peripherally extending filter ventilation zone and located in the mouth-side part made of cellulose acetate.

本发明涉及一种含活性炭滤嘴的过滤嘴香烟，该香烟带有：用香烟纸包裹的烟草；双过滤嘴，其中烟草端的部分由含碳薄纸组成，而近嘴端部分中的沿周边方向流动的滤嘴透气区，它由醋酸纤维素酯组成。

This paper combines with pipeline delivery of our countrys actual conditions and other methods of detection and location. To the leakage characteristic of the fault to the long-distance natural gas pipeline, a method is raised, which is on the basis of wavelet and negative-pressure-wave to detect the leakage and locate. Jobs in this paper are as follows:Multi-resolution decomposition and reconstruction of wavelet transform is utilized to filter the noises, which the leakage brings the noises of negative-pressure-wave. The research is worked in the wavelet and wavelet packet filter. The wavelet transform have a fast and accurate recognition capability to signal singularity. This paper chooses wavelet technology to catch the break point of pressure signal.

本文结合我国管道输送的实际情况和目前现有的各种泄漏检测与定位方法，针对天然气长输管线泄漏故障的特点，提出了基于小波分析和负压波相结合的方法检测泄漏并定位，其中主要进行了以下几个方面的工作：利用小波变换的多分辨率分解和重构技术，对采集到的管道发生泄漏时产生的负压波信号进行降噪处理，并对小波及小波包优化的降噪效果进行对比性研究；利用小波变换技术对信号奇异点的快速、准确的识别能力，捕捉负压波信号的突变点，从而判断是否有泄漏发生。

Objective To evaluate the hemocompatibility of a new inferior vena cava filter and the Cordis inferior vena cava filter.

目的 在动物体内评价一种新的下腔静脉滤器和Cordis下腔静脉滤器的血液相容性。

In order to improve tracking estimation accuracy of existing central difference Kalman particle filter,a new particle filter algorithm based on iterative measurement update CDKF is proposed.

为了提高中心差分卡尔曼粒子滤波算法跟踪时的估计精度，提出了一种基于迭代测量更新CDKF的粒子滤波新算法。

The different head loss pattern was considered as the reason of that up-flow BAF had a longer operation time than down-flow BAF. Carbonate gravel (3～5mm) filter had a larger porosity and consequently had a longer operation time than that of ceramist filter.

试验中发现，上向流曝气生物滤池运行过程中水头损失呈近线性变化，而下向流曝气生物滤池的水头损失则在接近过滤终点时呈明显的指数式突跃增加，这是导致下向流曝气生物滤池运行周期比较短、反冲洗比较容易的主要原因。

The design of low pass FIR filter applying in electric system by using both window function and chebyshev approximation methods in MATLAB software were introduced,and the conclusion was gotten that the filter design based chebyshev approximation methods was best.

1概述在数字滤波器家族中，FIR滤波器与IIR滤波器相比，由于具有严格的线性相位和因果稳定性等一系列优点，因而得到了广泛应用。

The project will develop a bandpass sigma-delta analog-to-digital converter for digital audio broadcasting system in three years. In the first year, we had finished the system simulation for IF receiver using conventional high speed ADC and bandpass sigma-delta ADC, respectively. We also had done the analysis and design of high-order bandpass sigma-delta modulator structure. In this year, we have developed a coefficient synthesis method for high order bandpass sigma-delta modulator using high order filter transfer functions (inverse Chebyshev bandreject filter function).

本计划将在三年内发展一个能应用在数位音讯广播系统的带通sigma-delta类比/数位转换器(analog-to-digital converter，ADC)，在第一年度中我们分别以传统高速类比/数位转换器及带通SD类比/数位转换器的接收系统为例，并结合编码正交多工器(Coded Orthogonal Frequency Division Multiplex，COFDM)的技术，建立一套DAB系统模拟的方法，同时并研究有关高阶带通SD类比/数位调变器的架构及电路，并已成功开发出一个由高阶滤波器合成的高阶带通调变器。

This paper presents a method of synthesizi ng non-equiripple low-pass filter based on iteration analysis,in which the rat ional fraction formed of Chebyshev polynomial is used as the filter characterist ic function.

提出一种用切比雪夫多项式构成有理分式作为滤波器的特征函数，并利用迭代分析进行非等波纹低通滤波器综合的方法。

First of all, the original current flows through the choke coil, because there is a coil-storage properties, which can filter out some of the initial high-frequency noise, and then further into the filter capacitors to clean up, even out (the peak shape into pola square wave).

原始电流首先流经扼流线圈，因为线圈有一个蓄能的特性，它可以初步过滤掉一些高频杂波，然后进入电容组进一步过滤、净化、拉平。

This filter is ideal for high performance applications where spectral isolation, flattop filter function and low chromatic dispersion are required.

此滤波器适用于频谱隔离，平顶过滤功能和需要低色散的高性能应用中。

If you were not , and OS X just booted normally, have no fear.

如果你没有，和OS X刚刚启动通常，没有恐惧。

I only want to preserve our all .

我只想保存好我们的一切