查询词典 receiver

Receiver Operating Characteristic analysis of classification performance of the proposed approach shows that the sensitivity is about 89% and the...

对该方法进行接收器工作特性分析，敏感性约为89%，ROC曲线下面积接近0.91。

Cohen's Kappa statistic and the area under the Receiver Operating Characteristic curve were used to evaluate the performance of the models.

并结合全球气候模式预估的未来情景对未来气候条件下的分布进行了预估。

This method improves estimation accuracy, and also reduces complexity of receiver and operating time.

该方法既提高了估计精度，又有效降低了接收机的复杂度和处理时间。

As a result, there are no specific advantages of processing signals in frequency domain, and we propose to directly process signals in time domain. By this way, it is observed that in time domain the signal signatures can be arranged into groups of orthogonal components, leading to a very natural group-wise symbol recovery scheme. To realize this figure of merit, we propose a GSC-based receiver, which also takes into account the mitigation of channel mismatch effects caused by the channel temporal variation and the imperfect estimation.

因此，吾人提出直接於时域中处理讯号，於时域中，吾人发现讯号特徵矩阵能够被分为数个拥有正交元素的群组，能自然地被用来设计群组式讯号侦测技术，为了实现此特性吾人提出一个GSC接收机，其能同时抑制通道时间变化与通道估计错误所产生之通道偏差效应。

In chapter five, the base band signal process of CDMA base station simulator system is introduced, including channel coding and decoding, interleave and disinterleave, PN sequence generator, orthogonal spread spectrum and quadrature Spreading, scrambling code, power control, digital forming filter, the capture and track of PN code, dispreading and demodulation, etc. Some FPGA design graphic and waveform simulation of base band transmitter module is given and realization algorithm of base band receiver is discussed in detail.

第五章介绍了CDMA基站仿真系统的基带信号处理过程，包括信道编译码、交织与去交织、PN码发生器、正交扩频与四相扩频、扰码、功率控制、数字成形滤波器、PN码的捕获与跟踪、解扩与解调等，并给出了基带发射机模块的部分FPGA设计原理图和波形仿真，详细论述了基带接收机模块的实现算法。

Receiver diversity for Orthogonal Frequency Division Multiplexing system in high-speed wireless data transmission is investigated.

研究了天线分集OFDM系统的高速无线数据传输特点，通过计算信道冲击响应与参考信号的相关函数，提出了一种增强型的信道估计方法。

RESULTS: Fractal signature of the medial tibial plateau at baseline was predictive of medial knee JSN progression (area under the curve 0.75, of a receiver operating characteristic curve) but was not predictive of osteophyte formation or progression of JSN in the lateral compartment.

结果：内侧胫骨平台的基线分形特征可以预测膝内侧关节间隙缩窄的进展（接受者操作特征曲线下面积 0.75），但不能预测骨赘形成和外侧关节间隙缩窄的进展。

The model simulations indicated that, when the outcrossing rate was no more than 1%, a 5 m buffer area with pollen receiver individuals between pollen donors and receivers was sufficient to minimize the frequencies of gene flow to .9%.

然而，对栽培水稻到其野生近缘种的基因漂移进行模拟的结果表明，栽培水稻到野生稻的基因漂移频率较高并且可能会对邻近的较大范围内的野生近缘种群体造成影响。

When the pollen density of pollen donor exceeded the critical density, the gene flow frequency did not increased any longer, and the maximum gene flow frequency detected was equal to the outcrossing rate of pollen receiver in theory.

在其他因素都固定的情况下，如果花粉受体的异交率较高，那么到该花粉受体的基因漂移频率也相对较高。

Audio and video steams accord with MPEG-2 standard can form PES after packeted, and then PES steam can form tranport stream after multiplexer. The transmitter conduct a number of transport stream multiplexing ,then send out the signal via satellite,cable or terrestrial transmitting station.The end user receiver picks up the DTV signal,demultiplexes it and finally the MPEG-2 decoder presents the decoded audio and video stream to the user.

按MPEG-2标准编码后的音频视频流经打包之后形成打包基本流，PES经过复用之后形成传输流，发射端进行多个传输流复用，最后通过卫星、有线电视及开路电视等不同媒介传输方式进行传输；接收端经信号接收，解复用，解码后显示给用户原先的音、视频节目。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。