查询词典 bandwidth

Through measuring round trip time and packet loss rate, every video receiver estimates independently TCP friendly available bandwidth of its upstream virtual link, and determines dynamicly its subscribed video quality.

通过监测往返时延和丢包率，每个视频接收端独立地估计其上游虚链路的TCP友好可用带宽，从而动态决定其订阅视频的质量。

In the last new years , as the demands of wireless communication system grows rapidly , the bands of microwave frequency had been saturated with various communication applications . To achieve wider spectrum for high-speed and high-capacity transmission , bands of millimeter-wave frequency are the solution of this problem . The advantage of MMW wireless communication systems is wider bandwidth comparing with microwave communication systems . To utilize the spectrum efficiently , many methods of complexly digital modulation is proposed . The more complex modulation , the higher linearity is required , and more various phase of signals are required to accomplish process of modulation . Therefore high-linearity and quadrature-phase modulator and demodulator are the emphasis of this thesis . For high level of integration , high performance and low cost , this chip is fabricated by the complementary oxide semi-conductor 0.13um process . A compact size of direct down-conversion and direct up conversion circuits will be presented in this thesis .

近年来随著无线通讯产业的蓬勃发展，微波频带已经趋近於饱和，为了追求更宽的频谱来达到更快传输速率及高资料容量的传输，宽频的毫米波频段提供了解决此问题的途径，毫米波无线通讯系统提供了相对於微波通讯系统宽频的优点，且为了更有效的使用频谱，各种不同且复杂的数位调变方式及方法被发表出来，越复杂的调变方式其所需的线性度越高，且需要更多不同的相位讯号来完成调变的过程，因此高线性度及四相位的调变及解调器将是此篇论文的研究重点，为了达到高整合性，高效能，及低成本的电路设计，我门利用互补式金氧半导体制程来完成此电路设计，因此一小面积的直接降频(Direct down-conversion)及直接升频(direct up-conversion)电路将在文中介绍。

This study shows that there is a liner relationship among the earthquake magnitude, epicentral distance and abnormal signal amplitude of the geoelectric field recorded at Wenxian station. For the signals with bandwidth of 0.003-30 Hz, the duration time of the anomaly is related to the lead time and the azimuth of epicental location.

研究表明，对于文县地电场观测点而言，震级、震中距、异常电信号幅度之间存在着线性关系；对带宽为0.003-30 Hz的异常信号而言，震前异常的时间长短与异常开始至发震时刻的时间长短存在着密切关系，且与震中方位有关。

Then, to compensate dispersion of a signal with bandwidth of 0.2 nm and center wavelength of 1550 nm, the thin-clad chirped LPFG with appropriate parameters is designed.

然后利用上述方法设计了对光纤中传输的中心波长为1550 nm，带宽为0.2 nm的信号进行色散补偿的薄包层啁啾LPFG。

The use of high-speed Internet growth in recent years, telephone and cable companies have started charging its users a large number of bandwidth at higher rates.

高速互联网使用增长在最近几年，电话和有线电视公司已经开始大量带宽的用户收取较高的费用。

The results show that:(1)the low-noise source-follower circuit can be effectively used to measure the output of PVDF thin film;(2)the piezoelectric coefficient D33 of the PVDF is very sensitive on temperatures;(3)the value of D33 intensively fluctuate in initial loading stage,this means that a pre-load is needed in practice application to keep a constant piezoelectric coefficient D33 of the PVDF;(4)when the compressive load is imposed on the surface of the PVDF along a incline direction,D33 value is obvious changed with changing incline angle,and(5)the frequency bandwidth of the PVDF thin film is very wide,it is more suitable to measure strike or impact loading at various loading conditions.

结果表明：(1)低噪声源跟随电路可有效测量PVDF 薄膜输出；(2)PVDF压电薄膜的压电系数D33对温度很敏感；(3)D33值在加载初始阶段波动很大，所以实际应用中应给PVDF提供一个预压载荷，以确保有一恒定的压电系数D33；(4)当压载荷沿倾斜方向作用在PVDF 表面时，由于有剪切力作用，D33 值会随着倾斜角的变化发生显著改变；(5)PVDF 薄膜具有很宽的频响，更适用于测定不同载荷条件下的侵彻或冲击等动态载荷。

If you use your PC for work during the day, and don't want Transmission to "hog" all of your bandwidth while you're trying to get important Internet related tasks done, set a lower transfer rate in the spaces provided, place a check in the Schedule Speed Limit between: box, and set the start and end times for this Transmission "throttle".

如果您使用您的电脑工作期间的一天，不想传输，以&猪&您所有的带宽，而您要获得重要的网际网路相关的工作做了，订定较低的传输速率，在空间所提供的地点，一检查在附表中的车速限制之间：框，并设定开始时间和结束时间为输电，这&油门&。

The experimental result shows that this new coding scheme has outstanding efficiency and scalability, and can be adaptive to the bandwidth variation of space network dynamically.

实验结果表明：该算法具有良好的编码性能，并能适应于空间通信网带宽的动态变化。

All in all, USB sound card with built-in sound card, especially the AC'97 onboard sound card compared to the soft, the biggest advantage is that it can get better quality output, but the limitations inherent USB bus than the soft-board sound not suitable for card games such as System of CPU resources and the urgency of the application bandwidth requirements.

总而言之，USB声卡与内置声卡特别是板载的AC'97软声卡相比，最大的优势就是能够获得更好的音质输出，但受USB总线先天不足的限制，比板载软声卡更不适合游戏之类对CPU资源和系统带宽需求迫切的应用。

A comparison between multi-rail networks and single-rail networks which have the same bandwidth as multi-rail networks is also given in theoretical analyses.

采用理论分析的方法比较了具有相同网络带宽的多轨网络和单轨网络，分析表明，前者可以有效降低网络延迟，因此能够比后者提供更高的网络吞吐率。

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。