At first, setting up the arith relation between the signal input and the signal output of the generalized multi-carrier system of the Discrete Fourier Test spread-spectrum; then setting equilibria parameters of the frequency field equilibria subcarrier of the generalized multi-carrier system of the DFT spread-spectrum according to channel frequency response, channel noise variance and equilibria method; then calculating average power of useful signal, interferential average power between signals as well as noise variance of the generalized multi-carrier system receiving terminal of the DFT spread-spectrum according to the arith relation as well as the frequency field equilibria parameter, and recomputing available signal information noise ratio, so as to calculate the available signal information noise ratio of the generalized multi-carrier transmission system accurately, the method for estimating the available signal information noise ratio can be used for link self-adapting transmission solution of the generalized multi-carrier system based on Discrete Fourier Test spread-spectrum and radio material management.
一种DFT扩频的广义多载波系统的SINR估计方法，其通过首先建立所述离散傅立叶变换扩频的广义多载波传输系统的信号输入输出之间的数学关系，然后根据信道频率响应、信道噪声方差和均衡方法，设定所述DFT扩频的广义多载波传输系统的频域均衡子载波的均衡系数，再根据所述数学关系及所述频域均衡系数分别计算所述DFT扩频的广义多载波传输系统接收端有用信号的平均功率、信号间干扰的平均功率以及噪声方差，再计算有效信干噪比，如此以实现对广义多载波传输系统的有效信干噪比的准确计算，该有效信干噪比估计方法可用于基于离散傅立叶变换扩频的广义多载波传输系统的链路自适应传输方案和无线资源管理方面。
The document introduces anti-jamming technolog of wireless communications on naval vesse, including:automorphism technolog of HF communications, frequency hopping and spread spectrum、automorphism self-structure self-resume communication net etc.
介绍舰船无线电通信的抗干扰技术，包括高频自适应通信技术、跳频及扩频通信技术、自适应、自组织、自恢复通信网等。
It is scary to note the frequency and wide-spread prominence of these events.
这些事例。出现频率之多、范围之广，令人害怕。
In the initial communication media planning, the project has been successful in more than 130 nationwide mainland mainstream media has been effectively disseminated, in a short span of 20 days of transmission cycle graphic media wordage 380, 000 word spread frequency 250 times.
在初步的媒体沟通规划之后，本项目成功地在全国范围内地130余家主流媒体上得到了有效传播，在短短20天的传播周期里平面媒体传播字数38万字，传播频次250余次。
The microspore was more like a tetrahedron, whilethe polar was more like a triangle. The number of microspore in every anther wasbetween 2600～3600, so the amount of pollen was quite large that it was propitiousto spread and pollination. P/O was 8088 and the breed system was singleheterosexual copulatoryb. The viability of pollen was normally above 50%. The testof pollen culture showed that the viability of pollen was up to the tiptop under thehigher temperature and lower humidity (38℃, 40%), while it was weakest under thelower temperature and lower humidity (16℃, 40%).The OCI is 4, and the breedsystem was belong to autocopulation. If it was heterosexual copulatory, there must beintermediums for pollination. It was recorded there were more than 40 species ofinsects on the anthotaxy or followers of Malania Oleifera. Under different weather, different living environments and different plants the frequency and rush hour of theinsects to visit the followers were different. Actions of different kinds of insect werealso different. According to the results of the observation, the form of fluid and seedof Malania Oleifera mostly rely on the action of insect pollination, especially thebees.
蒜头果的花序为聚伞形花序，有小花8～10朵，小花较小；按花粉大小等级划分，蒜头果的花粉粒属于小的范围；花粉粒呈近四面体，极面为近三角形：每粒花药所含的花粉粒在2600～3600粒之间，花粉量较大，有利于花粉的传播和授粉；胚珠比值为8088，繁育系统为专性异交类型；花粉生活力一般在50％以上；在不同温度湿度条件下测得蒜头果花粉的生活力在高温低湿(38℃，40％)的条件下最高，在低温低湿(16℃，40％)的条件下最低；杂交指数值为4，繁育系统自交亲和，异交，需要传粉者；记录到的访花昆虫有40余种，访花昆虫的访花频率及高峰时间不同，不同种类的昆虫的访花行为也是各有所异；从观察的结果看，蒜头果的种实的形成大多数依赖于传粉昆虫的活动，其中主要是蜂类。
This paper introduces Vacon converter applied to mine lift. In this application vacon converter is a special low frequency power supply. The output frequency of the converter is constant. The output voltage will change according to the pre-setting decrease curve and the real speed of the lift in low frequency brake stage. It realizes smooth brake and stabile creeping of the high voltage motor in mine. It has good utility and spread profit.
本文详细介绍介绍了Vacon变频器在矿井中的应用，该应用方案中Vacon变频器作为特殊的低频电源，在保持输出频率不变的情况下，根据外部控制信号的要求和实际的运行速度，控制输出电压的大小，实现了矿井提升机高压电机减速段的平稳制动和稳定爬行，具有较大的实用和推广价值。
Because of their powerful anti-interference and multi-address, spread-frequency and FH are used for military and civil purpose more and more frequently.
由于扩展频谱通信、跳频通信极强的抗干扰能力和多址通信能力，使其在军事和民用上得到了越来越广泛的应用。
Loan Spread Calculator Pro now provides the ability to easily calculate loan scenarios based upon variable payment frequency!
贷款蔓延计算器亲，现在提供的能力，很容易计算贷款场景基于可变频率付款！
Hybrid DS-SFH SS system has the advantage of both direct sequence spread spectrum and frequency hopping, thus it has much flexibility in design and is the trend of current antijam communication technique.
混合DS-SFH扩频方式兼具直接序列扩频和跳频两种扩频方式的优点，设计上具有更大的灵活性，是当前抗干扰通信技术的一个发展方向。
The key problems of software radio and direct sequence spread spectrum range used in high range radio fuze are discussed. The effects of doppler frequency and carrier's initial random phase are analyzed. A new direct sequence spread spectrum algorithm based on software radio is proposed, by using differential encoding and quadrature demodulating, the effects of doppler frequency and carrier's initial phase on the output of inference filter are eliminated successfully.
研究了软件无线电和直接扩频测距技术在大炸高无线电引信应用中的关键技术问题，分析了由于多普勒效应引起的载波频偏以及载波随机相位对测距的影响，提出了一种基于软件无线电的直接序列扩频解调算法，通过采用差分编码和正交解调的方法，消除了多普勒频偏和载波随机相位对测距的影响。
Based on current research, a digital watermark scheme is presented based on middle frequency by using spread spectrum principle. The watermark is a random squence of real numbers.
在上述分析的基础上，运用扩频通信原理，提出一种基于中频嵌入的数字水印方法，水印是一符合标准正态分布的随机序列。
And the solutions of the three problems above are discussed:The solution to the simulcast interfering which is caused by the simulcast delay spread and the zero-beating is given in chapter four. Based on the well understanding of the principle of MS-I/H/0 in IPNP, the examples are given in chapter five on how to solve the problem of communication interruption between paging zones. Through the analyse of signal switching between Chengdu and Deyang, the synchronization error between FLEX frames, and the bug in the multi-frequency roaming principle are pointed out. And solutions are also recommended.
通过以上分析，文章探讨了对上述三个问题的解决：·对同播干扰问题，分别分析了时延差和零拍频所造成同播干扰的客观存在，探讨了系统设计和网络优化的基本方法；·对IPNP联网障碍，提出了在掌握IPNP对各PNCC作为输入局／归属局╱输出局的灵活定义、以及相关参数配置原理的基础上，分析联网障碍的思路；·对信号切换障碍，以成都和德阳两地的局部广域覆盖为例，分析了FLEX帧失步和FLEX多频漫游原理设计缺陷的客观存在，并探讨了相关的解决方法和建议。
The hard drive on the physics of soft logic or Bad Track Bad Track, the user can try to use low-level format to achieve the role of Bad Track shielding, but needs to be pointed out here, does not mean the elimination of shielding Bad Track a Bad Track, low grid drive the original hard drive of all partitions are deleted, but there is still Bad Track, shielding Bad Track only hidden from the user data in the storage use of these Bad Track, this will guarantee a certain extent, the reliability of user data, Bad Track as it is the hard disk partition, format and frequency of the spread of the spread of growth.
对于硬盘上出现逻辑坏道或者软性物理坏道，用户可以试试使用低级格式化来达到屏蔽坏道的作用，但这里需要指出，屏蔽坏道并不等于消除坏道了，低格硬盘能把原来硬盘内所有分区都删除，但坏道却依然存在，屏蔽只是将坏道隐藏起来，不让用户在存储数据时使用这些坏道，这样能在一定程度上保证用户数据的可靠性，但坏道却会随着硬盘分区、格式化次数的增长而扩散蔓延。
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 using the time and space frequency resources in imaging transmission fully, a new hybrid optical code division multiaddress coding scheme is proposed, which is based on imaging transmission with two-dimensional optical orthogonal pattern code and time frequency spread spectrum.
为了在成像光通信中充分利用时间和空间两种频带资源，以成像光通信为基础，提出一种利用二维光正交Pattern码结合时域扩频实现光码分多址编码的新方案。
Currently, the rapid spread of air-conditioning control frequency conversion because prices are too high.
目前，制约变频空调迅速普及的原因在于价格过高。
In the spatial domain, canonical projection of the Wigner distribution function of the associated pupil function to show the insensitivity of the system's point spread function to the defocus-related aberrations is mainly used, and in the frequency domain, it is shown that the optical transfer function of such a system is also insensitive to misfocus through a geometrical description of the so-called Cornu spiral.
空域中，主要利用维格纳分布函数的正则投影来分析系统的点扩展函数对离焦像差的变化不敏感特性；频域中，则利用考纽螺线的图解方法来分析系统的光学传递函数对离焦像差的变化不敏感特性。
This kind of sequences has very high frequency, it also has better characteristic of autocorrelation and intercorrelation. It present a new kind of selecting scheme for spread-spectrum communication.
在本文的最后，我们将讨论一种基于蔡氏电路的混沌扩频序列，这种混沌扩频序列可以做到很高序列脉冲频率，同时它同样具有良好的自相关特性和互相关特性，它为扩频通信提供了一种新的序列选择方案。
The SSCG generates clocks at 1.5 GHz, a 5000 ppm down spread with a triangular waveform frequency modulation of 33 KHz.
论文中我们实现了一个1.5 GHz，具有5000 ppm、33 KHz三角波调变的展频时脉产生器。
Still can go to replace of line of sight beside a few tiny the creation activity that is full of enthusiasm however: In a corner of Chinese Tianjin, one is full of the media worker of language endowment and happy feeling, pass the multimedia website that achieves oneself -- instead wave, bore the weight of a frequency dialog program of another rich imagination, the media group that reachs Frankfurt from London was spread everywhere to inside very short time.
还可以将视线放回到身边一些微小却充满热情的创作活动：在中国天津的一个角落，一个富有语言天赋和乐感的媒体工作者，通过自创的多媒体网站——反波，承载了一个又一个富有想象力的音频对话节目，在很短时间内传遍了从伦敦到法兰克福的媒体圈。