Research of Upstream Channel Bandwidth Allocation Algorithm In HFC Network

The Optimization of Channel Bandwidth Design for Synthetic Aperture Radar System

合成孔径雷达系统通道带宽优化设计方法研究

In video communication, to transfer a video sequence over limited channel bandwidth, effective video compression is essential.

在视频通信中，为了在有限的信道带宽上传输视频，需要首先对原始视频信号进行有效的压缩。

The needed channel bandwidth is also reduced accordingly.

因此数据传输所需要的信道带宽也相应减少。

The experiment shows that the bandwidth utilization and the reduction of user perceived VOD startup delays in the case of prefix cache hit.

实验结果表明，在能够命中缓存前缀的情况下，带宽利用率和客户感知的启动延迟将极大地减少。

Trellis-Coded Modulation ( TCM) is an advanced combined coding and modulation technique evolved in recent years. In TCM, significant coding gains can be obtained without bandwidth expansion or reduction of transmission rate.

网格编码调制（TCM）是近年来提出的一种先进的组合编码调制技术，在不降低信息传输率、不扩展占用频带的前提下，它能获得可观的编码增益。

Trellis Coded Modulation ( TCM) has been widely used because it can obtain 2. 55~ 7. 37 dB coding gain without bandwidth expansion or reduction of the effective information rates.

由于格状编码调制（TCM）可以在相同的频带利用率下使信号得到2.55～7.37dB的编码增益，所以得到了广泛的应用。

Automatic mesh generation with optimization and bandwidth reduction by program will observably improve the efficiency and make the analysis result more reliable.

编制程序，实现了有限元网格的自动生成以及网格和带宽的优化，提高了分析的效率和可靠性。

Finally It is supplied that test for H.245 protocol and bandwidth control.

245模块和带宽控制功能的测试方案。

TCP bandwidth control plays an important role in improving quality of TCP-based services.

有效地控制TCP带宽对于改善TCP业务质量有着积极的意义。

Precise advertised window adjustment based on TCP bandwidth control algorithm

基于精细广播窗口调整的TCP带宽控制算法

A bandwidth control being associated with the network interconnection.

带宽控制与所述网络互连相关。

Theoretic analysis and technical implementation of bandwidth control

带宽控制技术分析及其实现

An adaptive network bandwidth control method for streaming media video transmission

一种自适应网络带宽控制流媒体视频流传输方法

Puts forward through the bandwidth control, flow control solutions.

提出了通过带宽控制、流量控制等解决方法。

Minimum FBE as the genetic algorithm optimization goal, by selecting, crossover and mutation operations, genetic algorithm searches the optimal combination of center frequency and bandwidth within the range, then optimal filter is designed.

以频带熵最小为遗传算法的优化目标，通过选择、交叉、变异等操作，在取值范围内寻找最优的中心频率和带宽组合，设计优化滤波器。

In our country, affected by some factor, such as the net bandwidth, the range of Internet application and the Internet trade environment, the website remote monitor is developing slowly.

在我国，由于受网络带宽、互联网普及程度、网上交易环境等影响，网站远程监控这一行业发展相对较晚。

Such limitations include computation ability, memory capability, power limitation and communication bandwidth and range. Many emerging wireless applications for emergency and military situations depend upon secure group communications. But group key management in sensor networks faces a great challenge because of the resource-limited.

然而由于传感器网络中节点的计算能力、内存容量、电能限制以及网络的带宽、无线传输能力等等的限制，使得传感器网络的组密钥管理面临巨大的挑战。

Actual detecting environment is strictly controlled by embattling shape, which directly influences the precision, bandwidth and range of spectrum.

实际测向环境对天线阵的布阵形状要求较严，形状选择的合理与否将直接影响测向精度、测向带宽及测向频谱的范围。

The two ultra-high frequency outer antenna sensors are made with wide band and narrow band respectively. The gain of two sensors is both greater than 1 and VSWR of the sensors is less than 2 in effective bandwidth range.

研制了宽带和窄带两种超高频外置天线传感器，两种传感器增益均大于1，驻波比在其有效带宽范围内均小于2，均能用于GIS局部放电超高频检测。

Result shows that in the bandwidth range antenna with VSWR is less than 1.6 while the efficiency reaches above 30% and thus has proved that genetic algorithm is an effective method for designing matching network.

设计结果表明，天线在带宽范围内端口驻波比小于1.6（VSWR<1.6）同时效率达到了35%以上，证明了遗传算法是一种有效的设计匹配网络方法。