基数据

By time-varying filtering, we realize the signal selectivity and interference suppression, especially for the signals with time-varying power spectrum. It is shown herein that conventional eigenstructure based methods are lower dimensional special case of the time-frequency subspace fitting method. The closed-form array response estimation algorithms for blind source separation in wireless communication is also developed in the dissertation by exploiting the data structure of second-order statistics of the array output in the presence of multipath. The proposed method achieves array response estimation with little constraint on signal property and propagation environment such as scatters or angular spread. Moreover, the array utilized here can be of arbitrary geometry and even uncalibrated. Since the closed-form solution is obtained, no misconvergency may occur and large amount of computation can be saved. The equivalent feed model and corresponding optimization designation are proposed to realize the downlink multi-user selective transmission. By coherent and non-coherent superposition of the electromagnetical field, multiple beams can be formed using a single array, so that each co-channel user signal is transmitted in each beam and will not interfered with each other. The proposed system scheme implements the digital beamforming and the channel allocation in the base band, therefore is suitable for the utilization of the radio software technology. The feasibility and effectiveness of the proposed model are proved by the RF experiment.

在窄带条件下，GSC－SSF方法还可以提高阵列的虚拟孔径，从而提高估计的性能；可以证明，Cyclic DOA 和SC-SSF方法可看作该方法的特例或近似； 3、提出了二维GSC－SSF方法和宽带谱相关DOA矩阵方法，利用信号的循环平稳特性解决了宽带条件下二维 DOA 估计问题，并具有阵元数少、计算量较小的特点； 4、提出了时频子空间拟合和宽带时频DOA估计算法，将联合时频分析的理论和方法引入到阵列信号的空间谱估计研究中，利用时变滤波实现信号选择性测向和干扰抑制，特别适合于谱时变信号；可以证明传统特征结构法可看作是时频子空间拟合方法的特例； 5、提出了多用户环境下阵列响应的估计方法——CARE方法，该方法对信号结构和传播参数（主要是散射源分布与角度散布）的约束较少，适用于各种几何结构的阵列甚至未校准的阵列，能够直接得到阵列响应的闭式解，因此计算量小、稳健性好，不存在收敛问题； 6、提出了针对多用户下行选择性发送的阵列等效激励模型、优化设计方法及其系统实现方案，通过空间场的相干叠加与非相干叠加使得单一阵列能够形成多个波束，并保证各波束内的用户信号各不相同且相互干扰最小；其系统方案具有在基带实现数字波束成形、信道分配并便于软件无线电实现的特点，其有效性已得到外场实测数据的证实。

The calculational results are in good agreement with the X-ray data and show that different substitute group results in different charge distribution, the exocyclic sulfur atom has the biggest negative charge value and this site is the most likely site of protonation and methylation as well as the potential coordination site with metallic ions.

计算结果与X-射线衍射数据相符合，并显示虽然不同的取代基导致了不同的电荷分布，但四唑环外的硫原子总是具有最大的负电荷分布，从而使其成为最有可能的质子化、甲基化及与金属离子进行反应的点位。

In the forth part, the heterotactic enthalpic pairwise interaction coefficients between amino acids and butanediol isomers (1,3-butanediol, 1,4-butanediol and 2,3-butanediol) at 298.15K and 310.15K are discussed.

第五部分：采用密度泛函理论等方法研究了甘氨酸分子分别与丁二醇的三种异构体分子以1：1的比例形成的氢键络合物，从B3LYP6-31G到6-31 G基组水平进行了优化，利用结合能数据讨论了焓对作用系数的差别。

In this work, isobutyl isobutyrate was prepared by the condensation of two molecular isobutyraldehyde in the presence of aluminium isobutoxide catalyst system.

依据间歇反应所得一系列数据，确定了异丁醛连续缩合反应工艺流程；考察了以异丁醛为原料，在 5～10℃，停留时间 1 5～ 2h ，在异丁氧基铝催化体系作用下，两分子异丁醛缩合成一分子异丁酸异丁酯；脱除催化剂后，粗产品精制得到纯度≥ 99 5 %的异丁酸异丁酯，异丁醛的转化率≥ 98 5 %，异丁酸异丁酯的选择性≥95 %。

He knew perfectly well that Dunhausen intended to be rid of him, and would have reported the Moff to the ISB had Nkik not removed his data transmitter.

他很清楚顿豪森想除掉他。如果不是因为恩基克拆除了他的数据传输器，他肯定会向帝国安全局告发顿豪森。

On the other hand one must also not mythicize public opinion surveys. Even the best surveys reflect people's opinion at specific points in time, they are not the only criterion for policy development.

当然，就算是以最科学化方法取得的民意数据，也只能反映市民大众在特定时空下基於某种认知下发表的意见，不能神化为主导社会发展的唯一规条。

The effects of the content of Hexogenand Nitroguanidine on the combustion behavior of nitramine propellant s under low pressure were studied in the closed bomb.

为了研究RDX和硝基胍对硝胺发射药在低压下燃烧性能的影响，对六种RDX/NGu配比不同的硝胺发射药进行低压密闭爆发器静态燃烧实验，获得了在20~60MPa压力范围内硝胺发射药的燃烧试验数据。

A series of nitrophenol indicators is studied rich HMO method.

实验数据；对硝基苯酚；电离常数；指示剂；方法研究；颜色变化

Using slow-adding and fast-agitating method, protective coating is prepared by adding proper filler, plasticizer, curing agent, solvent and so on, then the formula is optimized according to analysis of the performance of self-production and other production made at home and abroad, including appearance, viscosity, solid content, corrosion resistance, etching ratio, compactibility, bonding force and peelable ability.

在基料中配以合适的填充剂、增塑剂、固化剂和溶剂等，采用慢加快搅法制备此种涂料，并通过对比自制涂料和国外化铣保护涂料的性能及分析数据，即外观、黏度、固体含量、抗蚀性、浸蚀比和致密性，优化保护涂料的配方。

It suggests the multi-Markov model for determining evaluating, the way how to choose the structure of multi-Markov model, and solution based genetic algorithm. The result indicats: after importing preknowledge, quite precise evaluating result can be got under the condition of small swatch data.

提出了用于定性评估的多Markov模型，从&分解基&相关性的角度提出了多链模型结构选择的方式，实现了基于遗传算法的模型解法，计算结果表明：在引入先验知识后，能在小样本数据条件下取得较为准确的评估结果。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。