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Since the 2-D perfect difference codes have a MUI cancellation property and cross-correlation much lower than that of conventional 2-D spectral/spatial codes, such as Maximal-area matrices codes, the proposed system can completely eliminate the MUI and effectively suppress the PIIN.

由於二维完美相差码系具有一多使用者干扰相消特性，并且其交叉相关系数系远小於传统之二维频谱/空间码，如最大面积矩阵码maximal-area matrices codes， i.e。

Furthermore, residual interference is analyzed. In Chapter Six, Principal Component, Cross-Spectral Metric, Auxiliary-VectorFiltering and Multistage Wiener Filtering are applied to study low-rank blind space-timemultiuser detection with the generalized canonical representation in multipath channels.

第六章基于最小方差盲空时多用户检测的广义正则形式，利用主成分方法、互谱度量方法、辅助向量滤波和多级维纳滤波，研究了多径条件下的低秩盲空时多用户检测。

A new mixed spectral model of soil and canopy was put forward in this dissertation.

系统地研究了各类混合光谱模型的特点和局限性。

Absorbing boundary condition ; wave equation ; spectral element ; central difference method

吸收边界条件；波动方程；谱元；中心差分法

A self-adaptive feature extraction method based on power spectral centroid is proposed.

提出一种基于功率谱重心的自适应特征信息提取方法。

In Chapter 5,the characteristic impedances of the slot line with low dielectricconstant are computed by spectral domain method.

第五章研究辐射UWB/SP的集成天线，利用谱域法计算了低介电常数基片的槽线的特性阻抗。

Chirata, and they were identified as β-sitosterol and swerchirin by spectral method. These two compounds were got firstly from the petrolelum ether fraction of S. chirata.

结论］2种化合物β-谷甾醇与1，8-二羟基-3，5二甲氧基山酮均为首次从印度獐芽菜乙醇提取物的石油醚部位分离得到。

The cross-high-order-cumulant such as the cross-fourth-order cumulant is firstly proposed to measure the signal and for the first time prove that the CHOC can control the non-relevant noises and Gaussian noises. And based on the cross-high-order spectral Yule-Walker equations, the sinusoidal signal matrix is decomposed by the way of singular value decomposition method.

摘 要：本文以互四阶累积量为依据，首次证明了互高阶累积量可以有效地抑制非相关噪声和高斯噪声；并在建立互高阶累积量的Yule-Walker方程的基础上，通过该矩阵的奇异值分解，建立了信号矢量空间与噪声矢量空间；首次提出了混合噪声背景下正弦参数估计的互高阶谱Pisarenko方法。

The results indicate that the ST-EPR spectra of the former is significantly different from that of the latter. In cholate treated sample remarkably changes in the spectral diagnostic parameters L"/L, C'/C and H"/H are found and they are higher than in the control sample obviously.

本文比较了经胆酸处理和对照样品的马未酰亚胺自旋标记的F_1-F_0酶复合体的ST-EPR波谱，二者波谱呈现明显不同的形态。

This spectral change is not only dependent on the chromatic aberration of the lens, but also on the coherence of the partially coherent light.

而部分相干光在经过光阑透镜系统时，在近场和远场光谱都会发生变化。

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％。