查询词典 tributary channel

However, blind channel estimation is a very complex, very fargoing research topic. Because of the author's limit ability and time, only the simple subspace channel estimation method is studied. In the third part of this dissertation, the subspace channel estimation method in MIMO-OFDM systems is investigated.

信道盲估计技术因为仅仅根据接收到的序列来估计信道而特别有吸引力，盲估计方法大大提高了通信系统的吞吐量，因此，MIMO-OFDM系统中的盲信道估计技术成为一个研究热点。

Our results suggested that the channel contains two of each subunit and the stoichiometry is apt to 2:2 if hetermeric ASIC channel is a tetramer,while the assembly of ASICs is random,the stoichiometry is not fixed(2:1 and 1:2 coexist)if hetermeric ASIC channel is a trimer.This study provided interesting new data supporting the occurrence of the homomeric and heteromeric assembly of ASICs.

另外，我们还对ASIC异聚体的分子比情况进行了初步的探讨，结果发现如果所形成的ASICs异聚体通道是四聚体，那么每种亚单位有两个，分子比倾向于2∶2；如果是三聚体，则提示ASICs的装配是随意的，分子比是不固定的，2∶1和1∶2这两种情况都存在。

However, because of environment exacerbation, channel fission and difficult to harmonizing channel interior conflict, Studying on channel resource transvaluation and reforger is becoming increasingly imminency.

然而，由于渠道裂变、竞争环境恶化以及渠道内部矛盾难以协调等问题的存在，使渠道窜货治理方面的研究显得日益迫切。

Furthermore, single-point energy calculations were refined at the QCISD level of theory with the same basis set (6-311++G**). As a result, the singlet reaction of silylene with isothiocyanic acid contain S-atom abstraction channel, N—H inserted channel, and NH abstraction channel, respectively.

又用QCISD/6-311＋＋G**//B3LYP/6-311＋＋G**方法计算了各个驻点的单点能，计算结果表明单重态的硅烯与异硫氰酸的反应有抽提硫、插入、抽提亚氨基的路径。

There are three platinum catalyst micro channels which have different width ,such as 1000 m , 400m and 40m. The platinum catalyst micro channel reactor is fabricated by MEMS technology. The reactor uses the exothermic reaction of hydrogen and oxygen on the platinum catalyst plate as the heat source and the platinum thin film resistance deposited on a glass chip by face micro machining process as catalyst and temperature sensor. The channel is bonded with a cover plate etched by bulk micromachining technology to become a mico- channel reactor.

实验主要以微机电加工技术制作白金触媒微管道反应系统，利用微机电面型加工技术将白金薄膜电阻制作於基材为玻璃的晶片上，以此为反应所需的触媒及温度量测元件，并用体型加工技术蚀刻出微流道的上盖板相结合成微管道反应系统，本研究以1000μm、400μm及40μm的白金触媒微管进行测试，并利用微管道管壁上触媒表面降低反应活化能的特性来维持反应，此微反应系统利用氢气与氧气在白金触媒平板上的放热反应作为能量的来源。

Channel shrinkage ; overbank flood ; bank-flush discharge ; sediment deposition on flood plain and scouring in main channel ; water and sediment diversion ; river channel above Taochengpu on lower Yellow River

河槽萎缩；漫滩洪水；平滩流量；淤滩刷槽；调水调沙；黄河下游陶城铺以上河道

A novel lightly-doped channel approach for linearity improvement of InGaP/InGaAs pseudomorphic high-electron-mobility transistor device was presented. Light doping in the channel region of the conventional δ-doped InGaP/InGaAs PHEMT was adopted to provide a uniform and symmetric electron distribution in the channel region to achieve flat extrinsic transconductance distribution under different gate bias conditions.

本次实验在传统矽平面掺杂元件结构的通道区域中加入微量的杂质浓度掺杂，使得电子在元件通道层中的分布更为均匀及对称，以期望在不同的闸极偏压条件下得到较为平坦的转导值分布曲线，改善磷化铟镓/砷化铟镓假晶式高电子迁移率电晶体的线性度表现。

The bad thing is that the DXT compression formulas for color images used in DirectX favors only the green channel (usual 30%, 59%, 11% formular), the blue/z channel isn't that important (especially if we renormalize later), but the image quality can be improved by preserving the red channel better.

坏的是，在使用DirectX的彩色图像DXT压缩公式主张只有绿色通道（通常30％，59％，11％公式），蓝/？通道并不重要（尤其是如果我们归一化后），但图像质量可以改善红色通道保存较好。

The results of simulation experiments for single channel data or arbitrary channel of multi-channel data show the clearer event, the better wave shape and the higher SNR compared with the conventional convolution filter and common SVR based on RBF. So it is possible that SVR based on Ricker wavelet kernel function is applied to suppressing noise in seismic prospecting data.

对单道记录或多道记录中任选道的仿真实验表明，与传统的基于径向基核函数的支持向量回归及褶积滤波方法相比，使用本方法去噪后的同相轴更为清晰，波形恢复得更好，信噪比也较高，因此有可能将其应用于地震勘探记录的去噪处理中。

In order to overcome the disadvantages of system performance degradation on the condition of pilot numbers smaller than channel impulse length and bad channel environment in many paths, an improved semiblind channel estimation algorithm based on MLE for OFDM system was presented.

为克服信道冲激响应长度大于导频数时出现系统性能下降，适应存在大量多径的恶劣信道环境，本文对OFDM系统基于MLE的半盲信道估计算法进行了改进。

However it can often be frust ating for a child when people are unable to pronounce their name.

但它往往可以令人沮丧的一个孩子当人们无法断言他们的名字。

All these compounds were obtained from this genus for the first time. Compound, 4-cumylphenol, was a new nature product.

所有化合物均为首次从本属海藻中分离得到，其中4cumylphenol为新天然产物。