查询词典 frequency channel

Results showed that L-THP possessed negative inotropic and negative chronotropic action, lowed left ventricular pressure and it's infinitesimal calculus, decreased heart output in per min., shorten 〓 and 〓 of action potential of ventricular papillary muscle of guinea pig and even the plate-phase of action potential disappeared in larger dose group , but prolonged 〓. we studied transmembrane transportation of 〓 after administering L-THP , L-THP not only depressed uptake and increased release of Ca 2+ in normal myocardium, but also it showed stronger inhibition in cell injured by ISO, and fully eliminated the effect of ISO increasing uptake and decreasing release of 〓. By detecting the 〓 content of ventricular single myocyte using fluorescent probe Fluo-3/AM, results correspond to that done above, L-THP decreased 〓 content inside of cell significantly. Using whole-cell mode, we observed the effect of L-THP on Ica in ventricular single cell, it was found that L-THP decreased Ica, the effect increased with increasing it's dose, and had voltage, frequency-dependency. Dose highly corelated to effect, corelative constant is 0.87. When washing cell with normal tyre's solution, Ica could recover, which proved the blocked action of L-THP on calcium channel once again. Meanwhile, L-THP reduced production of MDA in heart injured by ISO in dose-dependent manner, improved content of GSH-Px, in case tissue or cell free from free radical damage.

结果显示，该药物具有负性肌力和负性频率作用，降低左室压及其微分，终使每分心输出量减少；缩短豚鼠心室乳头肌动作电位时程的〓和APD〓，大剂量使动作电位平台消失，〓延长；同位素示踪法研究证实L-THP抑制〓摄取，促进〓释放，降低细胞内的〓含量；单通道水平的研究证实，L-THP减少豚鼠心室肌单细胞内向钙电流，且具有剂量，电压，频率依赖性，其作用易于洗脱，药物剂量与Ica也具有高度相关性（相关系数r为-0.87）；L-THP还可抑制ISO损伤心肌组织所致的丙二醛含量增加，增加谷胱甘肽过氧化物酶的量，使组织细胞免受损伤。L-THP阻断L-型〓通道，抑制〓的摄取，促进〓的释放，降低细胞内〓含量L-THP作用的离子基础。

This thesis is focused on the study of 12-channel intermediate frequency sampling digital receiver array for one radar system.

本文以某雷达接收机为应用背景，开展了十二通道数字中频接收机阵列的研制工作。

A structure of space-time diversity virtual double-route weighting interference mitigating is proposed, and the corresponding practical algorithm is derived in detail using block matrix inversion formula and matrix inversion theory for mitigating interference signals from both other cells and other users of local cell in the DS-CDMA up-link communication case. Performances of such algorithm are thoroughly analyzed through simulation and analytical results. The up-link and down-link channel characters and their relationship of DS-CDMA communication system are thoroughly analyzed, and the relationship of space-time diversity weighting matrix between time division duplexing and frequency division duplexing these two different transmission ways is derived.

本论文深入地比较了DS-CDMA通信系统的上传情形与下传情形的信道特性及其它们相互之间的关系；深入地分析并得到了时分双工和频分双工两种不同的传输模式下的上传情形与下传情形的空时分集权系数矩阵之间的数量关系，从而使得能够利用在基站端所拥有的上传情形的空时分集接收权系数矩阵信息以及其他信息在基站端直接形成空时分集发射权系数矩阵；推导了下传情形移动用户接收机端的最优组合接收策略及其算法；进一步地，对时分双工传输模式下的下传情形的通信系统性能和频分双工传输模式下的下传情形的通信系统性能进行了深入的比较仿真研究。

Based on characteristics of the proposed pilot, an improved frequency domain least squares channel estimation method is proposed.

根据该导频的特性，提出了一种改进的频域最小二乘信道估计算法。

In this paper, the low-voltage power line channel characteristics is researched, a scheme of Broadband Power Line Communication based on orthogonal frequency division multiplexing is discussed and analyzed by simulation.

本文研究了低压电力线信道特性，探讨了基于正交频分复用的电力线高速数据传输方案并进行了仿真分析。

Second, we estimate the channel response on data subcarriers using linear interpolation in the frequency domain.

其次我们在频率域上使用线性内插法来得到在资料载波上的通道响应。

In this graduating design, with help of the great function of graphical user interface provided by Matlab software, a virtual dual-channel oscilloscope had been designed, which can display two signal waves as well as the Lissajous figure, and test the parameters of different signals such as voltage, frequency and phase etc.

在本毕业设计中，采用MATLAB应用软件强大的图形用户界面功能设计出一虚拟双踪示波器。该示波器能在荧光屏上同时显示出两个幅度随时间变化的信号波形；显示李沙育图形；通过调节水平扫描速度及垂直增益可以更好测试信号波形；可以测试各种不同信号的电参数，如电压、频率、相位差等。

Results General fatigue, weariness and no desire to speak, quadriplegia, megrim, acroanesthesia and so on, which reflect the main symptoms of MS, with occurrence frequency of above 60 percent. Five basic symptoms:Syndrome of haemostasis blocking collaterals (18.0%), dark purple tongue is the most important factor;Syndrome of dampness-heat blocking collaterals (17.2%), yellow greasy furred tongue is the important factor;Syndrome of yin-asthenia and obstruction of collateral (14.8%), rapid and thining pulse is the important factor;Syndrome of endogenous wind of liver and obstruction of collateral due to wind-phlegm (14.1%), physical convulsion is the important factor;Syndrome of asthenia of both qi and blood, and channel qi unfavorable (35.9%), feeble pulse is the important factor. Conclusion The location of MS is channels and collaterals.

结果 体倦乏力、神疲懒言、肢体无力、眩晕、肢麻沉重等出现频率在60%以上，积分排序位于前5位，体现了MS的主要证候特征。5个基本证候为：瘀阻经络证(18.0%)，舌紫黯为本型最重要的影响因素；湿热阻络证(17.2%)，苔黄腻为本型最重要的影响因素；阴虚络阻证(14.8%)，脉细数为本型最重要的影响因素；肝风内动、风痰阻络证(14.1%)，肢体抽搐为本型最重要的影响因素；气血两虚、经气不利证(35.9%)，脉虚为本型最重要的影响因素。

A 3 microFarad high frequency bypass capacitor is added to each channel.

3法拉高频旁路电容被添加到每个通道。

This paper proposes a novel channel estimation method for wireless Orthogonal Frequency Division Multiplexing systems.

摘要该文提出了一种新的信道估计算法，用于无线移动信道下的正交频分复用系统。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。