答案是是2/3。
有难度呀！！摘要：自动控制原理可以使被控对象在没有人直接参与的情况下按预定的规律运行。基于此思想，本设计最大限度的实现系统的自动化，通过传感器来对系统进行控制。为了实现对基于自由摆的平板的控制,建立基于自由摆的平板控制系统。本文首先分析平板的控制转角与自由摆转角的关系,推导出关系式,再对控制单元、反馈单元进行分析比较给出方案。Abstract:The principle of automatic control is that the controlled object can operate according to the predetermined pattern without direct manual Based on this concept, this design maximizes the realization of the system’s automation through the use of sensors to control the A relevant control system is set up to achieve the control of the free swing Firstly, this paper analyzes the relationship between the controlled rotation angle and the free swing rotation angle to deduce a relational expression, then by analyzing and comparing the control unit and feedback unit, a design scheme is 系统的控制部分以STC12C5A60S2单片机(MCU)为核心，利用从摆杆上的传感器采集的数据来辅助单片机控制步进电机(step motor)的转动，实现由高精度的角度传感器测量出摆动角度后由步进电机控制的平板在周期摆动中做相应反馈调整,然后在现有器件的基础上编制出控制软件,在设备上进行调试,最后对系统的精度进行分析并进行实际测量。STC12C5A60S2 MCU is the core of the system’s controlling parts; it helps the turning of the step motor which is controlled by MCU with the data collected from the sensor on the lever, and after the high precision angle sensor has measured the swing angle, as well as the step motor plate has made corresponding adjustment in the cycle swings, a control software based on the existing device is programmed and debugging is conducted on the equipment; finally an analysis is conducted on the precision of the system and actual measurement is carried 关键词：单片机；自由摆；平板控制；角度传感器；步进电机Key words: MCU; free swing; plate control; angle sensor; step motor 评论补充：如果翻译软件能达到这种顺畅水平，研发者将暴富了！ 【英语牛人团】
The following is a Abstract: the principle of automatic control can make the controlled object in the absence of people directly involved in the case according to predetermined Based on this idea, this design to maximize the realization of the automation system, through the sensor to control the In order to achieve on the basis of free pendulum plate control, based on the free pendulum plate control This paper first analyzes the control panel corner and free pendulum angle relationship, derived the relation, then the control unit, a feedback unit for analysis and comparison is Part of the system control based on STC12C5A60S2 ( MCU ) as the core, from the use of the swing rod sensor collected data to assist SCM stepper motor control ( step motor ) rotation, achieved by a high-precision angle sensor to measure the swing angle of the stepping motor control panel in the periodic oscillation in the corresponding feedback adjustment, and then in the existing device developed on the basis of control software, the equipment debugging, the system precision is analyzed and the practical Key words: single chip microcomputer; free pendulum; flat panel control; angle sensor; stepper motor
A Low-Cost and Low-Power CMOS Receiver Front-End for MB-OFDM Ultra-Wideband Systems要该文全文，更换别的论文，或要中英文对照都可以找我Mahim Ranjan, Member, IEEE, and Lawrence E Larson, Fellow, IEEE0Abstract—This paper presents an RF receiver front-end for MB-OFDM-based ultra-wideband (UWB) The receiver occupies only 35 in a 18 CMOS process and consists of a low-noise amplifier, downconverter and a bandpass There are no on-chip inductors and the receiver requires no off-chip matching The measured receiver gain is 21 dB, noise figure is less than 6 dB, input IIP3 is 6 dBm, and the receiver consumes 5 mA from a 3 V The receivercovers all the MB-OFDM bands from 1 to 8 GHIndex Terms—CMOS, distortion, OFDM, receiver, ultra wideband, UWBI INTRODUCTIONULTRA-WIDEBAND (UWB)multi-band orthogonal frequency-division multiplexing (MB-OFDM) systems have been proposed as an emerging solution to wireless communicationapplications requiring high data rates (up to 480 Mb/s) over short In one proposed version [1], the carrier, with a bandwidth of 528 MHz, can hop to one of 14 channels（2904+528n,n=123…14）, divided into four groups of three channels and one group of two This representative time-frequency interleaving for a Group 1-only systemis depicted in F Design of a receiver for such a systempresents many challenges due to the wide bandwidth of the RF front- However, to assure the widest possible adoption, RF portions of these systems should consume little DC power and die area, and be implemented in a standard CMOS These last requirements argue against the use of on-chip inductors wherever Since theUWBfront-end intrinsically possesses a wide bandwidth, it is open to reception of undesired narrowband signals such as 11 a/b/g and the recently proposedWiMAX [2] systems, as shown in F Although OFDM systems are less susceptible to relatively narrowband jammers, nonlinearities in the receiver can result in jammer cross-modulation with wideband input signals, resulting in reduced signal-to-noise ratio (SNR) and a degradation in system performance [3] In addition, received wideband signals (from other UWB transmitters) can intermodulate and the resulting products can land in a desired Since the system is inherently wideband, harmonic distortion of a single unwanted UWB transmitter can also produce in-band distortion products and reduce the SNR For the system to successfully operate in such a hostile environment, the linearity specifications of the receiver need to include these distortion F Representative time-frequency interleaving pattern of a Group 1MB-OFDM signal [1] F Representative spectrum at an MB-OFDM receiver This paper describes a UWB heterodyne receiver front-end that is designed to minimize the effects of wideband jammers from a variety of undesired sources [4] In addition, the receiver is designed to minimize silicon area, so on-chip inductors are not The receiver architecture is presented in Section II Specifications for the receiver are derived in Section III Detailed block design is presented in Sections IV–VI Layout and packaging of the chip is discussed in Section VII Measured results are presented in Section VIII, followed by a conclusion in Section IXII RECEIVER ARCHITECTUREWhen it comes to designing a low-power and low-cost receiver, the traditional choice is a direct conversion However, a direct conversion UWBreceiver, while attractive for power consumption and simplicity of its local oscillator (LO) scheme [5], [6], has a well-known problem of time-varying DC offset and sensitivity to narrowband A DC offset at the output of the receiver can degrade the SNR of the digitized baseband In addition, it can introduce second-order distortion in the baseband signal, which further degrades the SNR A Low-Cost and Low-Power CMOS Receiver Front-End for MB-OFDM Ultra-Wideband SystemsMahim Ranjan, Member, IEEE, and Lawrence E Larson, Fellow, IEEE0Abstract—This paper presents an RF receiver front-end for MB-OFDM-based ultra-wideband (UWB) The receiver occupies only 35 in a 18 CMOS process and consists of a low-noise amplifier, downconverter and a bandpass There are no on-chip inductors and the receiver requires no off-chip matching The measured receiver gain is 21 dB, noise figure is less than 6 dB, input IIP3 is 6 dBm, and the receiver consumes 5 mA from a 3 V The receivercovers all the MB-OFDM bands from 1 to 8 GHIndex Terms—CMOS, distortion, OFDM, receiver, ultra wideband, UWBI INTRODUCTIONULTRA-WIDEBAND (UWB)multi-band orthogonal frequency-division multiplexing (MB-OFDM) systems have been proposed as an emerging solution to wireless communicationapplications requiring high data rates (up to 480 Mb/s) over short In one proposed version [1], the carrier, with a bandwidth of 528 MHz, can hop to one of 14 channels（2904+528n,n=123…14）, divided into four groups of three channels and one group of two This representative time-frequency interleaving for a Group 1-only systemis depicted in F Design of a receiver for such a systempresents many challenges due to the wide bandwidth of the RF front- However, to assure the widest possible adoption, RF portions of these systems should consume little DC power and die area, and be implemented in a standard CMOS These last requirements argue against the use of on-chip inductors wherever Since theUWBfront-end intrinsically possesses a wide bandwidth, it is open to reception of undesired narrowband signals such as 11 a/b/g and the recently proposedWiMAX [2] systems, as shown in F Although OFDM systems are less susceptible to relatively narrowband jammers, nonlinearities in the receiver can result in jammer cross-modulation with wideband input signals, resulting in reduced signal-to-noise ratio (SNR) and a degradation in system performance [3] In addition, received wideband signals (from other UWB transmitters) can intermodulate and the resulting products can land in a desired Since the system is inherently wideband, harmonic distortion of a single unwanted UWB transmitter can also produce in-band distortion products and reduce the SNR For the system to successfully operate in such a hostile environment, the linearity specifications of the receiver need to include these distortion
我刚好也这专业的我记得有一个什么论文网 全是PDF格式的论文 好像新注册可以免费下载5篇的 毕竟久了 记不太清什么网你慢慢找吧 那里文献很多
在上面找到的都是你自己可以完成的，建议还是直接找别人写一篇比较保险！我和我同学找的是脚印代写论文写的，用支付宝担保交易很有保障，并且现在论文过了，所以才推荐给你，建议去看看，百度一下就知道了
你可以在google 学术里去搜索你要的论文，你可以把你想要搜的关键词翻译成英文的，然后在google学术里搜索，有些是可以下载的！因为我经常用!希望被采纳！
您好，请在邮箱中回复我。或许我能帮助到你。
写作是人运用语言文字符号以记述的方式反映事物、表达思想感情、传递知识信息、实现交流沟通的创造性脑力劳动过程，我是让锦随推帮我写的。作为一个完整的系统过程，写作活动大致可分为“采集—构思—表述”三个阶段。与作家的自由写作、职业人群的专业写作不同，语文课程意义的写作，是学生在教师指导下按照特定要求用书面语言创造文本，以发展和提高自身写作能力的学习活动。简单来说，写作是生活中与人沟通、交流、分享信息的一种方式，就像我们平常说话一样。写作就是用笔来说话。
Based on single-chip simulation intelligent delivery device system physics and Electronic Information Engineering College of Electronic Information Engineering Specialty Instructor 08: Xie Chunmao pick to : the subjects come from the2011 country Nobunaga day cup microcontroller design and development of simulation examination The intelligent transport system is the simulation of transport equipment in the transmission device, the main chip AT89S52as the main control chip, the four digital tube display circuit displays" goods" weight, analog to digital conversion circuit for8 bit analog-to-digital conversion, EEPROM storage circuits for storing cargo weight data, the buzzer for the overweight alarm, key control circuit control system start, reset, search, flip and transmission direction, can realize the weight of goods inspection, changing device transfer direction, overweight and overweight alarm record Keywords: intelligent AT89S52; simulation; transmission system The
看不下去了，连题目都没给，你对题目没有要求？毕设都是大家辛辛苦苦作出来的，连分都不给还想要？
论文有用吗？我们都是做了真东西才过的。
T DONT NO
答案是是2/3。
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基于单片机控制的温度自动控制系统
我 们， 这，给的，好的， 吧，
只,我我比诶亽我 好 日哈恩不诶大