查询词典 mean square

Results show that FPS-TMD can effectively reduce the structural dynamic response. Under the sine wave, the response of top level decreased about 30%, under earthquake, the response decreased above10%, maximum to 25%. And the mean square root of the response decreased above20%, more effective than that of the peak point of structural response.

分析结果显示FPS-TMD能够有效地减小结构的动力反应，在正弦激励下顶层反应峰值的减小在30%左右；在地震激励下顶层反应峰值的减小在10%以上，最大达到25%。

Iterative algorithm based on fuzzy control theory is put forward for designing diffractive optical elements for laser beam shaping, aiming at decreasing both mean square error and top beam uniformity of the output beam.

在光束整形衍射光学元件的设计中，为同时减小输出光束的均方根误差和顶部不均匀度值，提出了模糊控制迭代算法。

In this study, six campaigns around Anping tide gauge, Tainan, were successfully performed and the collected GPS buoy data were processed with four types of precise ephemeris provided by IGS, including final product, rapid product, ultra-rapid product and ultra-rapid product with the use of PPP technique. Comparing the PPP results with DGPS, the differences reach 3~5 cm in the horizontal and 10 cm in the vertical with final product; 6~8 cm in the horizontal and 15 cm in the vertical with rapid product; 15~20 cm in the horizontal and 30~40 cm in the vertical with ultra-rapid product; 2~3 m in the horizontal and 3~4 m in the vertical with ultra-rapid product. In addition, the collected data were also processed by DGPS techniques using different reference stations to analyze the effect of various baselines. The results show that accuracy degrades when the baselines increase.

本研究在台南安平潮位站旁进行6次GPS浮标施测，首先利用与GPS浮标距离不同之GPS参考主站来进行差分定位，分析基线距离对GPS浮标定位成果的影响，由实验结果可得出基线越长则定位准确度越低；再以IGS提供之最终产品、快速产品、超快速产品(Ultra-Rapid product)之观测部分observed half、超快速产品(Ultra-Rapid product)之预估部分四种不同发布延迟时间的精密星历与精密时表改正资料对GPS浮标进行精密单点定位解算，与传统差分相对定位方法定位结果进行比较后，得出使用最终产品之平面方向均方根误差(Root Mean Square Error， RMSE)可达3~5公分，而高程方向均方根误差可达10公分；快速产品之平面方向均方根误差可达6~8公分，而高程方向均方根误差可达15公分；超快速产品观测部分之平面方向均方根误差可达15~20公分，而高程方向均方根误差可达30~40公分；超快速产品预估部分之平面方向均方根误差可达2~3公尺，而高程方向均方根误差可达3~4公尺。

Simulation is carried out to compare it with least mean square-based blind equalizer and neural networks-based blind equalizer, and the results show the method has much better performance.

通过仿真实验，并与采用最小均方误差准则的盲均衡器和采用神经网络的盲均衡器进行比较，结果表明该方法的非线性均衡性能最佳。

Adaptive filter ; weak photoelectric signal detection ; least mean square ; gradient adaptive lattice joint processing

自适应滤波器；微弱光电信号检测；最小均方算法；梯度自适应格型联合算法

In this paper, a Minimum Mean Square Error based joint multi-cell channel estimation algorithm is proposed. By including the strong interfering users of adjacent cells into the channel estimation matrix, the noise power is significantly reduced which guarantees more precise channel estimation.

该文提出基于最小均方误差准则的联合多小区信道估计算法，由于改变了信道估计矩阵的结构，将邻小区强干扰用户也作为可以检测的用户信号来处理，降低了信道估计中噪声功率。

Theoretical analysis and simulation results show that the both the DPSO-DA and the HDPSO-DA acquire about 3 dB and 5 dB gain over the OSIC algorithm based on the minimum mean square error criterion at a bit error rate of 10^(-3) and have lower computational complexity.

理论分析和仿真结果表明，当误码率为10^(-3)时，与基于最小均方误差准则的串行干扰抵消算法相比，DPSO-DA和HDPSO-DA可获得约3dB和5dB的增益，且具有更低的复杂度。

The author briefly introduces the channel estimation methods and decision criterions of both SISO-OFDM system and MIMO-OFDM system, and gets the compared figures about performance of mean square error and bit error ratio.

作者简要介绍了传统SISO-OFDM系统和MIMO-OFDM系统信道估计的方法和判决准则，并给出了这些算法之间的均方误差和比特误码率的性能比较曲线。

We analyze the BER performance of PMBT with zero forcing, minimum mean square error receiver and optimum bit allocation and also compare the performance with Generalized MRT.

我们将使用零强制、最小均方误差接收器和最佳位元分配的PMBT系统来做位元误差率的分析并且和广义的最大传输率系统的效率做比较。

The quantizer can perform dynamic quantization for wavelet coefficients after the determination of the best quantization steps {qi} that minimize the average mean square error at a given bit rate.

在为DWT 系数确定好一组使给定码率下均方误差最小化的最佳量化步长{qi}后，该量化器将能够实现小波系数的动态量化。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。