Spread spectrum has two distinct flavors: direct sequence and frequency hopping.
该技术有两个明显的变型：直接顺序与跳频。
There is same bases usage frequency in coding sequence between leading strand and lagging strand.
先导链与滞后链编码序列的碱基使用频率基本一致。
Think about the sequence and the frequency with which individual patterns will be applied.
考虑将被应用的个别模式的使用顺序和频率。
The technology itself is straightforward. The ZeroTouch frame contains 256 infrared sensors and 32 LEDs, and each light blinks at a specific frequency that is read in sequence by the sensors.
这项技术本身很简单，零触摸框架模型内有256个红外感应器和32个发光二极管，并且红外感应器可对特定波长的任意光束进行有序读取。
There are two main alternatives, Direct Sequence Spread Spectrum and Frequency Hopping Spread Spectrum.
主要有两种选择，直接序列扩频和跳频扩频。
For integer frequency offset estimation, we analyze a sequence auto-correlation based algorithm, and extend the algorithm into frequency selective channel case.
对于整数频偏估计，分析了一种基于序列自相关的算法，并将该算法推广应用到频率选择性信道中；
The failure vector, failure frequency sequence, maintenance vector, and renovation sequence of repairable components were constructed.
构造了元件的故障向量、故障频率序列、维修向量和修复序列。
Reverse-spread spectrum device, time sequence inspection device, channel evaluation device and method for measuring frequency faults.
逆扩频装置，时序检测装置，信道估计装置和频率误差测量方法。
How to transform a character string into a numerical sequence is discussed from the time domain and the frequency domain.
主要从时域和频域两方面说明符号序列如何转换为数值序列。
Conventional dual up-conversion transmitter usually employs an intermediate frequency (IF) mixer and a radio frequency (RF) mixer to convert baseband user signal to IF and RF in sequence.
传统双上变频发射器通常采用中频(IF)混合器和射频(RF)混合器将基带用户信号依次转换成IF和RF。
The cell fusion instrument consists of high frequency generator, high amplitude pulse generator and sequence control logic unit.
电致融合仪主要由高频交流场、高压窄脉冲发生器以及控制逻辑单元组成。
The significant factors which exert an influence on instantaneous fluctuation of motor current are in sequence :Vari-speed wave form, vari-speed amplitude and vari-speed frequency.
在变速参数中影响电机瞬时电流波动最为显著的因素依次为变速波形、变速幅度和变速频率。
Based on joint time and frequency offset estimation, a reliable signal detection scheme is obtained by modulated pilot symbols using an m-sequence.
方案利用时频联合估计来得到可靠的信号检测，并从导频符号估计时间和频率偏移。
Through the operation of confusion and slot number mapping, a frequency hopping sequence can be produced with fine uniformity and less-than-512 arbitrary slot number.
该方法通过混淆运算、频隙映射的方式产生出均匀性好、可用频隙数小于512的任意频隙跳频序列。
The orthogonal frequency division and the direct sequence spread spectrum technology are effective methods.
正交频分复用和直接序列扩频技术是解决该问题的有效手段。
The emphasis is put on the effect of frequency offset and partial correlation of GOLD sequence on parameters.
主要考虑了频偏和GOLD码部分相关对参数选择的影响。
The constitution and evolution features of sedimentary facies and reservoir distribution rules are studied within the high frequency sequence.
在高频层序内研究了沉积微相的构成与演化特征以及储层分布规律。
This paper holds that comparatively rational grade and sequence can be obtained by taking into consideration of difficulty levels and usage frequency count of grammar items.
从语言难易度、使用频率等角度进行分级、排序，能够达到相对合理的程度；
Therefore, the deposition cycles and track sequence interfaces distinguished by 3d wavelet time frequency analysis method can be used to determine reservoir areas.
利用小波三维时频分析方法划分的沉积旋回和物性变化规律可以进行层序界面追踪，并进一步确定储层范围。
By analyzing the early phase of frequency decay, it is possible to identify multi-shock earthquake sequence, but it is difficult to rapidly judge intermittent double-shock and swarm.
分析地震序列前期的时频度衰减曲线有可能区分出多震型地震，但快速区分间歇双震型和震群型地震较为困难。
A timing and frequency synchronization scheme based on FH sequence is proposed for the free space optical communication Orthogonal frequency Division Multiplexing (FSO-OFDM).
提出了一种基于FH序列的自由空间光通信多载波调制(FSO - OFDM)时间频率同步方案。
The frequency hopping system based on software radio, DSP is used to generate quasi-stochastic sequence and control the output frequency of DDS to construct required hopping maps.
跳频方案采用软件无线电技术，采用DSP作为伪码发生器，控制DDS输出频率，得到相应的跳频图案。
Positive temperature coefficient (PTC) thermistor and triple frequency harmonic filter can reduce zero sequence voltage when a nonlinear resistance is used to prevent ferroresonance.
在非线性电阻消谐方式下，正温度系数(PTC)热敏电阻和三次谐波滤波器可以较好地解决零序电压偏高的问题。
Describes a new design of pulse frequency dividers in which timers NE556 and sequence control unijunction transistors are used.
利用定时器ne556和程控单结晶体管，设计了一种新型多路脉冲分配器。
The training sequence of channel estimation in frequency domain should have flat spectrum, which can estimate channel fast and exactly.
作为频域信道估计的训练序列要求具有平坦的频谱特性，可以快速准确地对信道进行估计。
In the spread spectrum communication, direct sequence spread spectrum (DSSS) and frequency hopping (FH) are the two kinds of most widely used spread spectrum technologies.
在扩频通信技术中，直接序列扩频和跳频是应用最广的两种扩频技术。
The zero-sequence angle-frequency characteristic of the lines are studied based on it and the characteristics of transient zero-sequence current in different frequency ba.
根据这一特点，对小电流接地系统中线路的零序参数相频特性进行研究，得出系统发生单相接地故障时不同频带上暂态零序电流特性。
Methods: By using polymerase chain reaction-sequence specific primers, frequency of HLADRB1 alleles in 72 patients with UC and 314 healthy controls were detected.
方法：采用序列特异性引物聚合酶链反应的方法对汉族72例uc患者和314例正常对照者HLA - DRB1基因分型。
First, based on the characteristics of FCCH in GSM, analyzing the frequency spectrum and the correlation of SCH training sequence are two ways introduced to capture FCCH.
侦察的方法包括：对频率校正信道的侦察采用了直接频谱分析法和通过同步信道训练序列的相关计算方法；
First, based on the characteristics of FCCH in GSM, analyzing the frequency spectrum and the correlation of SCH training sequence are two ways introduced to capture FCCH.
侦察的方法包括：对频率校正信道的侦察采用了直接频谱分析法和通过同步信道训练序列的相关计算方法；
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