查询词典 average power

In this paper we discuss a block coding scheme for reduction of peak-to-average power ratio of an orthogonal frequency division multiplexing system.

讨论了一种降低正交频分复用系统峰均比的分组编码方法。

The ASM fiber laser generates 1.8 picosecond pulses with 14 mW average power at 1 GHz repetition rate.

此系统的第一级光源为一功率为14 mW、脉冲宽度为 1.8 ps、重复率为 1 GHz 的脉冲序列。

Under the same process conditions and rotating speed, grinding pan diameter material level, grinding roller pressure are all the same, grinding efficiency of Model PRM roller mill can be rasied more than 30%, average power consumption can be saved about 8.2%, and impact vibration of the overall unit could be obviously reduced.

在同样工艺条件下，转速、磨盘直径、物料层、磨辊压力相同情况下，PR型立式磨粉磨效率可提高30%以上，平均能耗节约8.2%，整机的冲击振动显著减轻。

A method of peak-to-average power ratio reduction in the space division multiplexing MIMO MCCDMA system using Selected Mapping technique is presented in this paper.

同时针对传统的选择影射法需传输的边带资讯大的缺陷，提出将一种改进的SLM技术应用於系统中的方法。

To obtain good trade-offs between complexity and performance on peak-to-average power ratio reduction in orthogonal frequency division multiplexing using partial transmitting sequence schemes,a trellis structure based PTS factor search method is proposed.

为了得到部分传输序列降低OFDM信号峰均比方案中复杂度和性能之间的良好折衷，提出了一种基于格形结构的部分传输序列因子的搜索方法。

The ratio of peak and average power in multi-carrier system is much larger than that in single carrier system,and may grow unboundedly as the number of subcarriers grows to infinity.

多载波信号的峰值平均功率比远远大于单载波系统，而且峰平比随着子载波个数无限增长。

This paper systematically researched this sort of nonuniformly sampled signals'digital spectrum structure, signal-to-noise ratio , the response of D/A converter with nonuniformly sampled signals, the algorithm for estimating timing offsets, the relationship between the discrete time expression of the total energy and the continuous time expression, the estimation of the average power, the algorithm of recovery and application in designing and analyzing the digital waveform synthesizer.

本文全面系统地研究了这类周期性非均匀采样信号的数字谱结构，信噪比表达式，数模转换器对非均匀采样信号输入的响应，误差校正算法，时域与频域的能量对应关系，对功率测量的影响，内插恢复算法，以及在设计和分析数字波形合成器中的应用。

Methods Rats were exposed to S band HPM which average power densities were respectively 2~90 mW/cm^2. HE staining, Toluidine blue staining and electron telescope were used to study the change of the structure of cortex, and high performance liquid chromatography was used to study the changes of 4 amino acids (glutaminic acid, asparagic acid, GABA and glycine) of cortex in 6 h and 1d after exposure to 10 and 50mW/cm^2 HPM.

采用2~90mW/平方公分S波段高功率微波辐照Wistar大鼠，通过苏素素－伊红染色、甲苯胺蓝染色和电镜观察大脑皮层的形态结构改变；采用高效液相色谱仪检测10和50mW/平方公分照后6h和ld大脑皮层中4种氨基酸(谷氨酸、天门冬氨酸、γ-氨基丁酸和甘氨酸)含量的变化。

After our study, we got four new results. Firstly, it is feasible to use the wavelength stabilization feedback system to these high average power FELs. We can get stabilized wavelength lasers and the facilities can work stably.

我们得到了四点结论：首先，在这样高平均功率的FEL上加载稳定波长的反馈是可行的，能够很好的稳定住波长，并且系统能够稳定的工作。

It chosen delay as QoS parameters, utilised the advantages of concentration and universality coexisted in Tabu search, and reduced as much as possible the average power consumption of network nodes while ensuring the quality of QoS services, which elongates the life cycle of the whole network.

针对这个问题，提出一个基于Tabu搜索的低耗单播路由算法，该算法选择延迟作为QoS参数，利用Tabu搜索的集中性与广泛性并存的优点，在保证QoS服务质量的同时尽量减少网络节点平均能量消耗，以提高整个网络的生命周期。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。