查询词典 sub zero

a scheme of channel estimation using cyclic prefix based on the measurement of the low-voltage power line channel model is presented.after obtaining the frequency response of pilot sub-channel under the state of comb-type pilot,the data sub-channel response is obtained by interpolating the frequency response in frequency direction.in the pilot-free data period,the estimation of the channel is carried out by using cyclic prefix in order to improve the performance of system error rate.

摘 要：通过实际测量给出低压电力线的信道模型，在此基础之上提出了利用循环前缀对信道进行估计的方法，即在梳状导频模式时，使用导频获得导频子信道频率响应后，对其在频域方向进行插值得到数据子信道响应，在其后没有导频的序列的数据周期内，使用循环前缀对信道进行估计，从而起到改善系统误比特性能的目的。

The basic sub-classified as a millimeter ruler, as well as basic sub-classified as a cm, but at the starting point within a decimeter mm steel ruler engraved for the amount of distance precision.

基本分划为毫米的钢尺，以及基本分划为厘米，但在起点处一分米内刻有毫米的钢尺，适用于精密量距。

In some embodiments compounds described by the formula CCl.sub.xH.sub.y comprise carbon tetrachloride, dichloromethane, or combinations thereof.

在某些实施方案中，由化学式CClxHy所表述的化合物包括四氯化碳、二氯甲烷或它们的组合。

PIV experiments were performed to study Kelvin-Helmholtz discrete sub-vortices. Numerical simulation was performed to study this phenomena and spectrum of the discrete sub-vortices is discussed.

利用PIV实验对剪切层中由Kelvin-Helmholtz不稳定性引起的小涡运动状态进行了分析，对小涡脱落频率进行了统计；进而利用数值模拟的方法，也得到小涡脱落的频谱。

In the detection process,detector can rapidly wash out the sub-window which is unlike face through the front of simple stronger classifiers;for the sub-window which is like face,in terms of similar degree distributer can dynamically select the back of stronger classifiers to determine whether it is a face.

检测时，对于不像人脸的子窗口通过靠前的结构简单的强分类器快速将其淘汰掉；对于像人脸的子窗口，根据其与人脸的相似程度，由分发器动态地选择后面的强分类器进行判定。

Despite the channel is not smoothly,but each sub channel is smoothly and the signal be transferred by narrowband in sub channel,which can avoid disturber between sigal wave.

本文的研究表明，如果采用新的正交基来取代这些子载波，可以在不加保护间隔的情况下减少ICI和ISI，从而改进正交频分复用技术的性能。

It gives the concept of the disturbing sub function μ A ~, which extends the general sub function.

提出隶属函数μA～的扰动概念，给出了扰动隶属区间函数的定义作为一般隶属函数的一种延拓。

The introduction of line searches requires the solution of sub-problems must be a dropped direction, that is g T k δ k 0, In this paper, we study the existed methods of solving sub-problems, prove Zhang and Xun 1999's dogleg method and Steihaug 1983's conjugate gradient method to meet the condition of adequate decrease, then the solution can be used in line search.

引入线搜索要求子问题的解必须是下降方向，即g T k δ k 0，本文研究了现存的子问题的求解方法，证明了Zhang和Xun1999折线法、Steihaug1983共轭梯度法满足"充分下降条件"，得到的解可以安全实施线搜索。

After designing the hardware, using STEP 7 and MCGS to realize PLC sub stations function of data collection, control and alarm, the communication between PLC sub stations and epigyny machine and software designing and emluation of every function of the monitor interface.

先对系统进行硬件设计，然后在软件STEP 7环境中和MCGS平台下实现底层PLC子站对船舶机舱内数据的采集、控制和报警功能，PLC子站与上位机的数据通信以及整个系统监控画面所实现的各项功能的软件设计和仿真。

The complexity of connectivity search at the worst situation is O, N is the side length of image. The complexity of connectivity ergod is O, N_q is the number of sub-pattern instances.With the connectivity operation of sub-pattern instance, contour extraction, Euler number computing and connected component labeling of binary rectangle NAM image are researched.

以子模式实例的连通关系处理算法为基础，分别研究了基于矩形NAM图像的二值图像轮廓提取、欧拉数计算、连通区域标记等图像运算，给出了具体的算法和分析，并将其与流行的基于其它图像表示的同类相关运算进行了比较。

Newly designed quick-refill fuel tank cap and dust proof radio box back-up their impressive form by also contributing to the low center of gravity.

新设计的快速填充油箱盖和防尘电台方块备份其令人印象深刻的形式也有助于低重心。

The book is a spin-off from his master's thesis.

这本书是他的硕士论文的派生作品。