power ratio

High solid exterior wall latex coatings are prepared of acrylate emulsion, rutile titanium pigment and micro ground chalk, resulting in lower condensing ratio after dry and higher hiding power.

采用丙烯酸酯乳液做分散介质与金红石型钛白粉和超细重钙粉等配制的高固含量外墙乳胶漆，降低了涂料干燥后的收缩率，提高了涂料的遮盖力等。

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New and Low Complexity Companding Technique for Reducing Peak-to-Average Power Ratio of OFDM Signals

新的低复杂度降低OFDM信号峰均功率比的压缩扩张技术

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Using transient current and voltage waveforms collected by welding quality analyzer Hannover in gas metal arc welding ( GMAW) process, the power ratio indices was defined from date math statistical methods.

利用焊接质量分析仪采集气体保护焊焊接过程中瞬时电流和电压波形特征，对测的数据进行数学统计，提出电源功率比率指数的概念。

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Reduction of Peak-to-Average Power Ratio of OFDM System Using a Partial Companding Method

降低正交频分复用系统峰均功率比的部分压扩算法

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The main concern of the study has been the assessment of the spacial distribution of the tritium breeding ratio, the plutonium breeding ratio, and the power density in multi-dimensional configuration and the comparison between One-, two-, three-dimensional global calculation.

重点分析了多维几何中造氚率、造钚率及功率密度的空间分布，比较了一维、二维和三维积分量的计算结果。

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One of the key techniques is to reduce the peak-to-average power ratio ( PAPR ) of the OFDM-CPM system.

降低OFDM -CPM 系统中的峰值平均功率比 ( PAPR ) 是关键技术之一.

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The optimal relations between power and isentropic temperature ratio exponent, and between efficiency and isentropic temperature ratio expo-nent are derived, by which the optimal relation curve between power and efficiency can be obtained.

导出最佳效率时的功率与等熵温比指数、效率与等熵温比指数的关系式，以及最佳面积比，进而得到最佳效率与功率关系。

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The high Peak to Average Power Ratio ( PAPR) is the main drawback of MC-CDMA.

峰均功率比过高一直是影响MC-CD-MA应用的一个重要因素，这已成为MC-CDMA技术实用化的最大障碍。

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However, difficulties in high peak to average power ratio, sub-carrier bases selection and optimal basis selection has restricted the further development and application of wavelet packet division multiplexing.

然而，峰均功率比较高、子载波基的选择以及最优基选取方法较复杂等难题一直制约着小波包分复用技术的进一步发展与应用。

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The modeling performance is assessed in terms of in-band and out-of band errors, such as normalized mean square error and adjacent channel error power ratio, and it is compared with a conventional NARMA, a memory polynomial with respect to accuracy and computation complexities.

广义NARMA模型性能通过使用归一化的均方误差和邻道误差功率比等带内和带外失真误差进行评价，并且在计算精度和计算复杂性方面和传统的NARMA模型及记忆多项式模型进行比较。

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Reducing Peak to Average Power Ratio Based on Low Complexity Companding Technique A Novel Scheme Based on Companding Transformation to Reduce PAPR in OFDM Systems

基于压扩变换的低复杂度PAPR降低技术研究一种降低OFDM系统峰均功率比的压扩变换方法

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This paper proposes a weighted feature reduction method based on Fisher' discriminant ratio ( FDR) for a time-shift invariant feature, power spectrum, in radar automatic target recognition using the high-resolution range profile ( HRRP).

针对雷达高分辨距离像的平移不变特征&功率谱特征，提出了一种基于Fisher判决率的加权特征压缩方法。

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Based on the model, the paper studies how to design wind turbine controller, enables the system operating in the vicinity of the maximum power point, when the wind speed below the rated wind speed. That is the tip speed ratio lies in the optimal value.

在建立的模型基础上，研究了当风速在额定风速以下时，如何设计控制器使得风力机运行在最大功率点附近，也就是说将叶尖速比控制在最佳值。

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In this paper, an improved delay and correlation algorithm is proposed for timing synchronization. The delay and correlation algorithms as well as the double sliding windows power ratio algorithm are used in an actual low voltage power line communication system.

对比分析了双滑动窗功率比值法、延迟相关算法、改进的延迟相关算法应用于实际低压电力线弥散通信环境中的效果，结果表明采用改进的延迟相关算法更稳定可靠，精度更高。

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in order to reduce the peak-average power ratio ( papr) of single carrier-frequency division multiple access ( sc-fdma) system, a new method based on statistic companding was proposed.

为了减小单载波频分多址接入系统（SC-FDMA）的峰均功率比（PAPR），提出了基于统计压扩的新方法。

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detection of side information for peak-to-average power ratio reduction of the ofdm signal using the suboptimal pts method

降低OFDM信号峰均比的边带信息检测方案

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Assuming that the baseband OFDM signal is characterized by a band-limited complex Gaussian process, the distribution of the peak-to-average power ratio ( PAPR) in band-limited OFDM signals is investigated.

假设基带OFDM信号为一带限复高斯过程，研究了带限OFDM信号峰平功率比（PAPR）的分布。

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By reasonable hypothesis and deduction, the power ratio of straight light to reflect light from linear vehicle light source is approximately converted to the area ratio of the spherical crown in this article by the author.

通过合理的假设与推导，将汽车车灯线光源的直射光与反射光的总功率之比近似地转化为两部分球冠面积之比；

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With the minimum frictional power loss and the maximum "the minimum oil film thickness" as the optimum objectives, the marine stern tube bearing is optimized by adjusting the length to diameter ratio, the clearance ratio and the altitude angle ratio.

并分别以功耗最小、最小油膜厚度最大为优化目标，通过改变长径比、间隙比、偏角比对尾管轴承进行了优化设计。

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The relationship between the generator output power and thermoelectric leg aspect ratio is derived. The matching relationship between the load resistance and aspect ratio, and which between the external thermal resistance and aspect ratio are obtained respectively.

导出了发电器输出功率与电偶臂面长比的关系式，获得了负载电阻及外部热阻两者分别与面长比的匹配关系。

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Moreover, it can transmit data at a high speed in the frequency selective fading channel. However, one problem of OFDM lies in the big Peak-to-Average Power Ratio ( PAPR), which leads to intermodulation distortion of OFDM signals and degradation of systematic functions.

然而，OFDM系统中最主要的问题之一在于OFDM信号的峰值平均功率比（PAPR）很大，容易导致OFDM信号的交调失真和系统性能的下降，这就限制了OFDM技术的广泛应用。

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The Peak-Average Power Ratio Reduction Method Based on Statistic Companding for SC-FDMA Systems

SC-FDMA系统中基于统计压扩的峰均功率比减小方法

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The power factor ( pf ) is the ratio of average power to apparent power.

功率因数 是有功功率与视在功率之比.

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the choice of sc-fdma in uplink was fuelled by its low peak-to-average power ratio ( papr).

上行选择SC-FDMA是由于其具有较低的峰均功率比（PAPR）。

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Assessment of Using Power Ratio Indices GMAW Metal Droplet Transfer Mode

利用功率比指数对气体保护焊熔滴过渡模式的实现

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Simulation results show that the fuzzy Control System had tracked of the best tip speed ratio when the wind speed is low, and get a stable output power when the wind speed is high.

仿真结果证明，模糊控制系统在低风速时很好的跟踪了最佳叶尖速比，在高风速时得到了稳定的输出功率。

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And this paper analysis and research the whole system and establish mathematical model, result in which the changing power-load adjusting is the control way of the best Tip Speed Ratio.

本文分析研究并建立系统数学模型，根据系统模型确定最佳叶尖速比的控制采用可变功率负载调节方法。

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However, the high peak-to-average power ratio ( PAPR) of MC-CDMA signals results in nonlinear distortion and degradation of bit error ratio ( BER) performance, which is the obstacle of utilities of MC-CDMA.

但是，MC-CDMA信号的高峰均功率比（PAPR）会导致非线性失真及误码率性能恶化，已成为MC-CDMA技术实用化的最大障碍。

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peak-to-average power ratio reduction scheme of an ofdm signal based on slm algorithm

一种基于SLM算法的峰平功率比减小方案

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Study of peak-to-average power ratio reduction method bases on OFDM of the differential recursive scheme

降低OFDM系统峰均功率比的差分回归法研究

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