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If in the input signal processing system, signal-to-noise ratio has been bad, even among buried in noise signal, so we want to come out, with only the signal detection method of low noise electronic design washed-up. Weak signal detection is using modern electronics and signal processing method to extract useful signal from the noise, the key is to reduce the noise. Recovery, and increase and extract useful signal. Related detection technology is according to the related principle, through the autocorrelation or cross-correlation computing to maximize the compression bandwidth, reduce the noise, to detect weak signal a technique. This paper from the signal processing system signal-to-noise improvement to simply discusses the principle of weak signal detection. Emphasis is made to the relevant assay detect weak signal principle, method and application
The lock-in amplifier, is called LIA, it is one take the correlation instrument as the core weak signal detection instrument, it can examine the weak sinusoidal signal in the strong noise situation the scope and the phase. It has four main part compositions: The signal channel, refers to the channel, the correlation instrument (i.e. correlation detector) and the direct-current amplifier. Any instrument has own main performance index, the equivalent noise band width, the signal-to-noise ratio improvement and the dynamirange take lock-in amplifier's main performance index, is helpful to its understanding in understanding that its principle of work as well as the blockage decide amplifier's application. This article main discussion lock-in amplifier's principle of work and in laser smog test system's application.
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If in the input signal processing system, signal-to-noise ratio has been bad, even among buried in noise signal, so we want to come out, with only the signal detection method of low noise electronic design washed-up. Weak signal detection is using modern electronics and signal processing method to extract useful signal from the noise, the key is to reduce the noise. Recovery, and increase and extract useful signal. Related detection technology is according to the related principle, through the autocorrelation or cross-correlation computing to maximize the compression bandwidth, reduce the noise, to detect weak signal a technique. This paper from the signal processing system signal-to-noise improvement to simply discusses the principle of weak signal detection. Emphasis is made to the relevant assay detect weak signal principle, method and application
我在工作，没时间帮你翻译了。我可以给个建议你。如果英语表达能力一般，翻译之前把你的文摘改好：改成标准的中文句式，主谓宾定状补都要按正规的语法放置。然后网上在线翻译，最后自己把关，错误的语法、不标准的专有名词改好。这样速度最快。
2FSK Signal, Modulation and Modem二进制频移键控信号, 调制和解调Does a communication signal have fingerprint characters? This paper discusses the existence probability of fingerprint characters of communication signals, then analyses fingerprint characters of 2FSK signals,and extracts partial fingerprint characters of 2FSK signals.人有表示个体属性的指纹特征 ,无线电通信信号 (下称信号 )是否存在描述个体电台的电子“指纹”特征 (下称“指纹”特征 )呢 ?文中分析了信号“指纹”特征存在的可能性 ,并以 2FSK信号为例 ,论述了 2FSK信号应具有的“指纹”特征 ,同时提取了其中部分“指纹”特征。According to the characteristics of 2FSK signal and 2PSK signal, a new method based on weak signal detection by Duffing chaotic oscillator to detect 2FSK signal and 2PSK signal is presented.根据Duffing混沌振子微弱信号检测方法进行研究的基础上,根据2FSK信号和2PSK 信 号的特点,提出了一种2FSK、2PSK信号的检测的新方法。To acquire the information of railway binary frequency-shift keying(2FSK)signal s upper and down side frequencies and base low-frequency with high accuracy in real time,a novel frequency detection algorithm compatible with China-made system and France UM71 system was proposed.为实时高精度获取铁道二进制频移键控信号的上、下边频和基带低频信息,提出一种 可兼容国产制式和法国UM71制式的频率检测新方法。The target of the communication system flat is modeling and calculating to modulation and demodulation of seven kinds of signals:AM,FM,SSB,2ASK,2FSK, 2PSK,2QPSK.通信仿真平台的任务是对调幅、调频、单边带、二进制振幅键控、二进制频移键控、二进制相移键控、正交相移键控等七种通信信号的调制和解调进行建模和计算。It emphasizes on 2FSK modem of locking phase loop frequency mixing, hardware and software of addressing control of single-chip computer-AT89C51.介绍了一种基于单片机寻址控制的有线电视收费系统,重点对系统应用锁相频率合成技术的2FSK调制和解调、单片机AT89C51寻址控制的硬件和软件进行了分析,还对系 统利用PIN管宽带工作特点对高频电视信号进行关断和系统的抗干扰措施进行了一定的介绍。 The 308 MHz/315 MHz/418 MHz/433.92 MHz low power FSK Superheterodyne Receiver adopts high integrated,low power,CMOS Superheterodyne RF receiver chips in MAX7042,with a sensibility range from-110 dBm to-109 dBm,receiving a FSK data which speed up to 66 kbps(NRZ)(33 kbps Manchester code). 所设计的308 MHz/315 MHz/418 MHz/433.92 MHz低功耗FSK超外差式接收电路,采用MAX7042高集成度、低功耗,CMOS型超外差式射频(RF)接收芯片,灵敏度为-110~-109 dBm,接收频移键控(FSK)数据速率可达66 kbps(NRZ)(33kbps曼彻斯特编码); Through the experiments with two systems,which based on two kinds of the binary system frequency shift keying(2FSK) modems,the algorithm's validity is tested. 以两种二进制频移键控(binary system frequency shift keying,2FSK)调制 解调器搭建系统进行实验,验证了该方法的有效性。 The working principle,algorithm analysis and software design method of a simplified V.23 2FSK modem based on DSP which is a kind of programmable chip are introduced in this article. 介绍了简易V.23二进制频移键控(2FSK) 调制解调器的工作原理、算法分析以及基于可编程器件DSP的软件设计方法。 The automatic fire alarm system is discussed which consists of a iron-type smoke detector NC14468, a microcontroller 8051 and a radio frequency transceiver nRF401. Because of nRF401 being introduced into which adopts the radio communication technology and the FSK technology , the system is improved increasingly in the performances , such as real-time function and high responsibility. 讨论了用 MC14468 离子型烟雾检测报警器、单片机 8051、nRF401 单片射频收发器构成的火灾自动报警系统。 由于引入了无线通信技术和 FSK(频移键控) 调制解调技术为核心的 nRF401 射频收发器,使系统的性能大大提高,尤其是使系统报警更具实时性和可靠性。 Through the experiments with two systems,which based on two kinds of the binary system frequency shift keying(2FSK) modems,the algorithm's validity is tested. 以两种二进制频移键控(binary system frequency shift keying,2FSK)调制解调器搭建系统进行实验,验证了该方法的有效性。 This dissertation, basing on simulation, makes a deep research on simulating signal of GMSK (Gaussian filtered Minimun Frequency Shift Keying) baseband modulation and demodulation in AIS (Automatic Identification System) equipment. The technology related in the following makes the modulation and demodulation of baseband signal into realization by TI DSP, at the same time, provides a key technique to develop AIS system inland. 着重对自动识别系统(AIS-Automatic Identification System)设备的高斯滤 波最小频移键控(GMSK-Gaussian filtered Minimum Frequency Shift Keying)基带 调制解调信号进行了仿真研究,并在仿真的基础上,在TI的DSP上实现了基带信号的调 制解调,为国内研制AIS系统储备了关键技术。 Moreover,based on the designed fiber grating and the technology of wavelength division multiplexing,a frequency shift keying radio-over-fiber communication system is suggested,and the proposed scheme may be taken as one of the candidates for the next generation high-speed and large-capability radio-over-fiber system. 同时基于所设计的光纤光栅和波分复用技术,提出了一种频移键控光纤无线通信系统Radio Over Fiber系统,为下一代的高速大容量的光纤无线通信系统系统提供一种可行的备选解决方案。 By using the service work that the telecommunication bureau provides caller information to subscriber (inserts caller number and other relevant information between the first and the second ringing of the subscriber terminal) , this scheme sets up a platform using binary frequency shift keying (FSK) decode technique on the subscriber side, receives the caller (reporting side) telephone number, then through the data base in the service equipment, finds the caller (reporting side) material and information, and chooses the corresponding police action plan. 利用电信局对用户提供主叫信息的服务业务 (在对用户终端的第一次和第二次振铃之间 ,插入主叫方号码以及其他有关信息 ) ,在用户终端设置一种采用二进制频移键控 (FSK)解码技术的平台 ,接收主叫 (报警方 )电话号码 ,并通过服务器里 的数据库 ,查询到主叫(报警方 )的资料 ,然后做出相应的处警方案评价 添加词条 短句来源 For the conventional modulation and demodulation of Minimum Frequency Shift Keying(MSK), the new models for modu-lation and demodulation on digital MSK based on VHDL are developed. 针对传统的最小频移键控(MSK) 的调制解调方式,提出一种基于甚高速硬件描 述语言(VHDL)的数字式MSK调制解调模型。 The conception,classification,research status and system structure are presented in this paper,also it presents a new space-time coded cooperation based on space-time frequency keying,and finally analyzes its performance. 介绍了协作分集技术的基本概念、分类、研究现状以及系统结构,提出了由空时频移键控设计的空时编码协作分集方式,并分析了其性能。 Combining the advantages of space-time block codes and frequency keying, space-time frequency keying (ST-FSK), which did not require any channel state information at the transmitter and the receiver, could adopt the non-coherent ML detector under the Rayleigh fading channels [1]. 空时频移键控(ST- FSK)结合了空时分组码和频移键控的优点,在瑞利衰落信道条件下无需信道信息,可采用非相干的最大以然(ML)检测器。 In the scheme, FSK-FDM technique is used in sub-carrier modulation, and the EDFA’s supervisory information is transmitted by optical intensity modulation. 该方案利用频移键控 频分复用 (FSK FDM)技术进行声频副载波调制 ,通过光强度调制实现远程在线EDFA监控信息随主信号的传输。 There are three basic types of digitally modulated signal: MASK, MPSK and MFSK. 数字调制信号分三种基本类型：多进制幅度键控MASK、多进制相移键控MPSK和多进制频移键控MFSK。 For improving the baud rate of system, this text adopts the GMSK (Gauss in Filtered Minimum Shift Keying) modulation method to replace ASK (Amplitude Shift Keying) modulation method of current IFCNSS. 为提高系统的传输速率,本文采用GMSK(Gaussian Filtered Minimum Shift Keying高斯滤波最小频移键控)调制方式来代替目前“安全通信网”中的ASK(Amplitude Shift Keying幅移键控)调制方式。
If the signal-to-noise ratio at the input terminal of signal processing system is bad, or even buried in the noise, low noise electronic design will not be sufficient to detect the signalWeak signal detection allpies modern electronics and signal processing methods to extract useful signal from the noise, the key of which is to reduce the noise and recover, increase and extract useful signal. Related detection technology is a technique based on the relativity principle.It can utmostly reduce the bandwidth and the noise and test the weak signal through the calculation of autocorrelation or cross-correlation.This paper will discuss simply the principle of weak signal detection based on the improvement of signal-to-noise ratio in the signal processing system. It puts an emphasis on the principle, method and application to detect weak signal applying relativity detection.人工翻译，请参考
吕进，男，中国计量学院研究生部教授，长期来从事测试计量技术与仪器仪表学科本科生及研究生的教学与科研。为本科与硕士研究生讲授：传感器，流量计量与测试，微弱信号检测，测量与仪表技术等课程。主持及参加国家及省自然科学基金项目及企业委托项目多项，研究领域涉及近红外检测技术、激光多普勒测速仪及三坐标测量机等。出版编著、译著4部，发表学术论文30余篇。
Because of the increased degree of automation, all production processes are concentrated control or detection, measurement instruments and measured the distance between distant objects, environmental conditions more complicated. In particular, the measured signal is weak and is buried in the noise of how the weak signal was detected more and more people's attention. Weak signal detection is an emerging technology disciplines, cover the application of optical, electrical, magnetic, acoustic, thermal, biological, mechanical, geological, environmental, medical, laser, materials, and other fields. Its equipment has become indispensable to modern scientific equipment. Weak signal detection is the purpose of extracting useful from the noise signal, or use some new technologies and new ways to improve the detection system output signal a letter impatient than the paper first to understand the weak signal detection technology development on the basis of the status quo, have weak signal detection technology The basic principle, the weak signal conditioning for the detailed design. The design chosen photoelectric detector to weak-signal acquisition, preamplifier Yun-partly because of bandwidth limitations and gain the request, using two amplifier. Selection of low noise, high-bandwidth OPA380 transported to the first-class signal amplification, Wan Fang LM358 completed two to enlarge. In this paper, the design of second-order Chebyshev low pass filter to enlarge active after the signal filtering, signal filtering, with a voltage signal for increased drive capability. In weak signal processing circuit design, the layout of the circuit boards for the detailed design, to reduce leakage current in the circuit. .
关注微信公众号 获取最新考试信息 姓 名：刘越所在单位：北京理工大学光电学院联系电话：68912565-17E-mail：liuyue#bit.edu.cn学科专业一光学工程研究方向一虚拟现实与增强现实、微弱光电信号处理、计算机视觉学科专业二社会兼职中国图象图形学会青年工作委员会委员 中国光学学会光电技术专业委员会委员 中国仪器仪表学会高级会员 中国仪器仪表学会光机电技术与系统集成分会理事个人概况1992年9月进入吉林工业大学电子系通信与电子系统专业攻读硕士学位，硕士论文题目是塑膜彩色套印自动对版系统及其控制算法的研究。1997年3月进入吉林大学信息工程学院通信与信息系统专业攻读博士学位，博士论文题目是极低信噪比条件下正弦信号参量估计算法及其性能的研究。2000年12月进入北京理工大学博士后流动站，主要从事虚拟现实和增强现实人机交互与跟踪注册技术方面的研究工作。2002年10月作为引进人才进入北京理工大学光电工程系光电信息技术与颜色工程研究所工作，2005年7月获得研究员专业技术职务任职资格。 讲授本科生学位课波动光学，本科生选修课虚拟现实技术，研究生学位课虚拟现实与增强现实技术，研究生选修课微弱信号检测技术，作为项目负责人主持包括国家自然科学基金项目虚拟现实中手部跟踪技术的研究、高精度姿态测量系统及其自动校正技术研究、国家重点研究基础发展计划(973计划)子课题、军队863项目、中国博士后科学基金项目、装甲兵装备技术研究所武器装备国防重点实验室建设项目、空军第三飞行学院、总装备部轻武器论证研究所、海军航空工程学院委托项目等在内的十余项国家和省部级课题，科研经费充足。作为导师指导硕士研究生16名，有两名已毕业的硕士研究生的学位论文被评为北京理工大学优秀硕士学位论文。 主要研究方向包括虚拟现实与增强现实系统人机交互技术、摄像机位置和姿态的准确跟踪、环境特征标志的准确提取、三维立体图形的生成与显示、摄像机标定技术、微弱光电信号检测技术、医学图像处理与手术导航系统跟踪技术等，近年来共发表论文50余篇，其中6篇已被SCI检索、21篇已被EI检索，已申请专利5项(作为第一发明人已获得2项授权)，获2002年度国家安全部科技进步二等奖一项。研究生报考咨询1V1指导（点击咨询）免责声明本文章来源为院校研究生官网，如对稿件内容有疑问，请与院校招生办联系。研招网转载出于非商业性的教育和科研之目的，不代表赞同其观点或证实其内容的真实性。如转载稿涉及版权等问题，请来函联系修改或删除。标签: 导师介绍返回列表
由于自动化程度的提高，各个生产环节都集中控制或检测，测量仪器与被测对象的距离较远，环境条件较为复杂。特别是被测信号是微弱的而且是深埋在噪声中的，怎样对微弱信号进行检测越来越受到人们的重视。微弱信号检测是一门新兴的技术学科,应用范围遍及光、电、磁、声、热、生物、力学、地质、环保、医学、激光、材料等领域。其仪器已成为现代科学研究中不可缺少的设备。微弱信号检测的目的是从噪声中提取有用信号,或用一些新技术和新方法来提高检测系统输出信号的信躁比本文首先在了解微弱信号检测技术发展现状的基础上，掌握微弱信号检测技术的基本原理，对微弱信号调理电路进行详细设计。本设计选用光电探测器对微弱光信号进行采集，前置放大部分由于运放带宽的限制和放大倍数的要求，采用二级放大电路。选用低噪声、高带宽的运放OPA380进行信号第一级放大，运放LM358完成二级放大。本文设计切比雪夫型二阶低通有源滤波器对放大后的信号进行滤波，信号经过滤波后，采用电压跟随器加大信号驱动能力。在微弱信号调理电路设计中，还对电路板布局作详细设计，以减少电路中的泄漏电流。
If in the input signal processing system, signal-to-noise ratio has been bad, even among buried in noise signal, so we want to come out, with only the signal detection method of low noise electronic design washed-up. Weak signal detection is using modern electronics and signal processing method to extract useful signal from the noise, the key is to reduce the noise. Recovery, and increase and extract useful signal. Related detection technology is according to the related principle, through the autocorrelation or cross-correlation computing to maximize the compression bandwidth, reduce the noise, to detect weak signal a technique. This paper from the signal processing system signal-to-noise improvement to simply discusses the principle of weak signal detection. Emphasis is made to the relevant assay detect weak signal principle, method and application
我在工作，没时间帮你翻译了。我可以给个建议你。如果英语表达能力一般，翻译之前把你的文摘改好：改成标准的中文句式，主谓宾定状补都要按正规的语法放置。然后网上在线翻译，最后自己把关，错误的语法、不标准的专有名词改好。这样速度最快。
If the signal-to-noise ratio at the input terminal of signal processing system is bad, or even buried in the noise, low noise electronic design will not be sufficient to detect the signalWeak signal detection allpies modern electronics and signal processing methods to extract useful signal from the noise, the key of which is to reduce the noise and recover, increase and extract useful signal. Related detection technology is a technique based on the relativity principle.It can utmostly reduce the bandwidth and the noise and test the weak signal through the calculation of autocorrelation or cross-correlation.This paper will discuss simply the principle of weak signal detection based on the improvement of signal-to-noise ratio in the signal processing system. It puts an emphasis on the principle, method and application to detect weak signal applying relativity detection.人工翻译，请参考
问题一：微信订阅号里面的摘要是什么意思 楼主您好！ 摘要又称概要、内容提要。摘要是以提供文献内容梗概为目的，不加评论和补充解释，简明、确切地记述文献重要内容的短文。 希望我的回答可以帮到您，望采纳！！祝您生活愉快！！ 问题二：怎样在微信公众账号写图文？摘要需要写吗？ 两个办法，1.用电脑登录微信公众账号自己设计但图文或者多图文； 2.用Photoshop 先编辑好图文，再在电脑上登录微信公众账号，直接插入图文 问题三：微信公众平台摘要是什么意思 微信公众平台的素材是指用于图文消息编辑、群发的图片、语音、视频等材料，登录公众平台后，可以在素材管理中进行管理编辑，编辑保存在素材库里的图文消息，可以用来群发，步骤如下： 1）登录微信公众号。 2）选择素材管理，点击新建图文消息。 3）编辑好内容之后，保存。 4）选择群发消息，选择需要群发的图文消息，通过微信扫一扫二维码，确认就可以发出文章了。 问题四：订阅号怎么新建图文消息摘要怎么填写 进入微信公众号后台 素材管理 新建图文消息 编辑标题/正文，摘要看提示，有必要就自行添加 保存，预览。觉得满意即可发布 问题五：做微信公众平台时摘要会显示出来吗 不会。要关注了之后才会 问题六：微信公众平台里的摘要怎么去掉 你是说公众平台的介绍吗？如果是这个的话，可以登录平台，点击头像或者左边的公众号设置，那儿找到功能介绍一项，点击修改，然后保存就好了。 问题七：微信公共平台多文图消息可以由摘要吗？ 多图文暂时还没有摘要这个功能，只有单图文才有摘要。 多图文没有摘要，最好是3-4条篇左右，既然是多图文，少了肯定是不好看的，多了别人也不愿意去看。如果想要诸多人关注，可以将标题、图片弄的吸引人。希望能帮到你！ 问题八：微信公众号编辑多图文,第二篇以后如何添加摘要 多图文是没有摘要的； 多图文的第一篇都没有摘要，只有单图文才可以添加摘要！ 问题九：微信公众平台发什么内容呢? 做微信公众账号内容无论是个人账号还是企业账号，无论是订阅号还是服务号，目的都是服务好用户，黏住用户，通过这些用户为个人或者企业创造一定的价值。那如何把微信公众号做好？首要的也是最为重要的就是内容，没有好的内容是无法吸引用户、黏住用户以及使得用户自传播。做不好内容，除非你的公众号是个红包发放中心，天天发红包，否则是不会引来一 *** 用户的。 一、 那么应该发布什么样的内容才是用户喜欢的呢？ 1、文章主题积极，读完后让读者感到兴奋； 2、让用户非常愤怒和恐慌的文章； 3、让读者觉得自己消息灵通、见多识广； 4、实用且容易记住的内容； 5、有价值的故事； 6、特别有创意的搞笑漫画、图片； 二、内容的安排 手机的使用时间是碎片化加上屏幕是有长短的，所以每天发布的条数不要太多，如果太多不仅会让用户有抵触的心理，自己还劳力费心。推送的文章分为三个到四个栏目为最佳，头条是干货、下面的分别为资讯、杂谈、活动。 1、干货的定位，提供具有实操指导性的图文，让用户可以拿来照搬就能用的。 2、资讯的定位，最新最劲爆的，处于所在行业的前沿动态。 3、杂谈的定位，就是生活中的趣事儿，乐事儿，要有正能量，要有自己的情感分享，要让文章读起来具有人情味。 4、活动的定位，活动是根据个人或者企业的实际情况而做的，要让用户有参与性，而不是直接给，比如（除了个别特吸引人，比如：红包），给予用户一种他是劳有所获的感觉。 三、内容的编辑 在移动互联网时代，体验和参与感非常重要！图文信息打开速度影响用户阅读率，道理简单，却总被忽视。如果没有特殊的需求，文字800-1000最好，图片4张以内比较合适（原创搞笑或者吸引人的漫画除外），图片越小越好但是要清晰，视频不要超过5分钟。 1、标题： 每篇文章的标题要有特点，就是要做所谓的标题党。现在订阅的公众账号太多了，竞争激烈，再好的文章，读者不点进来看也是白搭，所以标题非常重要。 2、摘要： 不宜写一大段文字，应只写一两句话。这一两句必须引导读者想读下去的欲望。 3、内容排版： 避免出现大段大段的文字，如果有，应分拆成小段落后，读起来会更舒服。如果手机整屏都是一段文字，眼睛容易疲劳。 4、引导关注： 新账号应在每篇文章的开头应提醒阅读者关注，在文章的最后，要附带上公众号或者二微码信息。微信的内容可能会被分享到各种地方，带上自己的公众号信息，就增加了一个增粉入口。 5、推送时间： 根据用户习惯，用户看公告号的时间到多为早上上班的路上，中午吃饭时间，下午下班时间，晚上吃饭前时间以及收拾好上床睡觉前时间等。由于公共号多，内容稍微差点儿就会被忽略、折叠了，所以具体什么时间，还是根据运营人自己的时间和观察而定。 总结：无论用户从哪个推广渠道来的，总之一定要让来的用户有惊喜，有用户想要的，而不是失望而去，所以一定要根据个人或者企业自身的定位以及数据分析判定用户喜好去做好内容，有好的内容才会有分享，有分享才会增粉，有粉公众号才会创造价值，达到个人或者企业的创建公众号的目的。 问题十：去除微信公众号素材管理的摘要 这……你问的是什么，能描述清楚些吗？ 如果是单图文消息，你不在摘要那里写东西，就不显示摘要。多图文消息本来就没有摘要。
摘要就是内容概要，如果是发的是单图文，那用户会看得找，如果是多图文是不会显示的，参
考下图：
摘要又称概要、内容提要。摘要是以提供文献内容梗概为目的，不加评论和补充解释，简明、
确切地记述文献重要内容的短文。
摘要就是这篇微信里面的简短的介绍
要删除微信公众号文章摘要，可以按照以下步骤进行：1. 打开微信公众平台，登录自己的账号。2. 进入对应的公众号，选择需要编辑的文章，点击“编辑”。3. 在文章编辑页面，找到原先的摘要内容，点击其右侧的“删除”按钮。4. 删除成功后，再重新编辑新的文章摘要内容，可以直接在摘要区域输入新的文字，也可以点击右侧的“自动提取”按钮，让系统根据文章内容自动提取新的摘要。5. 编辑完成后，点击页面下方的“保存”按钮，保存修改后的文章内容即可。需要注意的是，如果文章已经发布并且被用户阅读过，修改后的摘要内容可能不会立即生效，需要等待一段时间才能更新。