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  • Error Correction Coding mathmatical method...

    一本難得得關(guān)于通信糾錯碼得好書。對原文件進(jìn)行了優(yōu)化----添加了目錄,鏈接,大大縮小了體積。

    標(biāo)簽: mathmatical Correction algorithms Coding method Error and

    上傳時間: 2017-10-08

    上傳用戶:jinnmy

  • 基于多尺度字典的圖像超分辨率重建

    Reconstruction- and example-based super-resolution (SR) methods are promising for restoring a high-resolution (HR) image from low-resolution (LR) image(s). Under large magnification, reconstruction-based methods usually fail to hallucinate visual details while example-based methods sometimes introduce unexpected details. Given a generic LR image, to reconstruct a photo-realistic SR image and to suppress artifacts in the reconstructed SR image, we introduce a multi-scale dictionary to a novel SR method that simultaneously integrates local and non-local priors. The local prior suppresses artifacts by using steering kernel regression to predict the target pixel from a small local area. The non-local prior enriches visual details by taking a weighted average of a large neighborhood as an estimate of the target pixel. Essentially, these two priors are complementary to each other. Experimental results demonstrate that the proposed method can produce high quality SR recovery both quantitatively and perceptually.

    標(biāo)簽: Super-resolution Multi-scale Dictionary Single Image for

    上傳時間: 2019-03-28

    上傳用戶:fullout

  • Complex Orthogonal Space-Time Processing

    Multiple-Input Multiple-Output (MIMO) systems have recently been the subject of intensive consideration in modem wireless communications as they offer the potential of providing high capacity, thus unleashing a wide range of applications in the wireless domain. The main feature of MIMO systems is the use of space-time processing and Space-Time Codes (STCs). Among a variety of STCs, orthogonal Space-Time Block Codes (STBCs) have a much simpler decoding method, compared to other STCs

    標(biāo)簽: Orthogonal Space-Time Processing Complex

    上傳時間: 2020-05-26

    上傳用戶:shancjb

  • Implementing+802.11

    Communication, a word that many associate with modern technology, actually has nothing to do with technology. At its core, communication involves nothing more than the spoken or written word, and symbolic languages like art and music. Technology has become synonymous with communication because technology has historically been the method by which communication to or by the general population takes place. 

    標(biāo)簽: Implementing 802.11

    上傳時間: 2020-05-27

    上傳用戶:shancjb

  • Practical+Guide+to+MIMO

    The purpose of this book is to introduce the concept of the Multiple Input Multiple Output (MIMO) radio channel, which is an intelligent communication method based upon using multiple antennas. The book opens by explaining MIMO in layman’s terms to help stu- dents and people in industry working in related areas become easily familiarised with the concept. Therefore the structure of the book will be carefully arranged to allow a user to progress steadily through the chapters and understand the fundamental and mathematical principles behind MIMO through the visual and explanatory way in which they will be written. It is the intention that several references will also be provided, leading to further reading in this highly researched technology.

    標(biāo)簽: Practical Guide MIMO to

    上傳時間: 2020-05-31

    上傳用戶:shancjb

  • Signal Processing for Telecommunications

    This paper presents a Hidden Markov Model (HMM)-based speech enhancement method, aiming at reducing non-stationary noise from speech signals. The system is based on the assumption that the speech and the noise are additive and uncorrelated. Cepstral features are used to extract statistical information from both the speech and the noise. A-priori statistical information is collected from long training sequences into ergodic hidden Markov models. Given the ergodic models for the speech and the noise, a compensated speech-noise model is created by means of parallel model combination, using a log-normal approximation. During the compensation, the mean of every mixture in the speech and noise model is stored. The stored means are then used in the enhancement process to create the most likely speech and noise power spectral distributions using the forward algorithm combined with mixture probability. The distributions are used to generate a Wiener filter for every observation. The paper includes a performance evaluation of the speech enhancer for stationary as well as non-stationary noise environment.

    標(biāo)簽: Telecommunications Processing Signal for

    上傳時間: 2020-06-01

    上傳用戶:shancjb

  • Neural Systems For Control

    If you are acquainted with neural networks, automatic control problems are good industrial applications and have a dynamic or evolutionary nature lacking in static pattern-recognition; control ideas are also prevalent in the study of the natural neural networks found in animals and human beings. If you are interested in the practice and theory of control, artificial neu- ral networks offer a way to synthesize nonlinear controllers, filters, state observers and system identifiers using a parallel method of computation.

    標(biāo)簽: Control Systems Neural For

    上傳時間: 2020-06-10

    上傳用戶:shancjb

  • 用三點(diǎn)法實(shí)現(xiàn)機(jī)器人三維位置測量的研究

    用三點(diǎn)法實(shí)現(xiàn)機(jī)器人三維位置測量的研究摘 要 :提 出 了一 種 微 小 爬 壁 機(jī) 器 人 三 維 位 置 測 量 的新 方 法 。筆 者 通 過 深 入 分 析 研 究各 種 位 置 測 控 方 法 與 系 統(tǒng) ,提 出采 用單 目視 覺方 法 中的 聚 焦法 ,以 CCD作 為 傳 感 器 ,用 三 點(diǎn) 法 實(shí)現(xiàn) 對 機(jī) 器 人 的 三 維 位 置 測 量 。 驗(yàn) 證性 實(shí)驗(yàn) 結(jié)果表 明 ,本研 究提 出的測 量原 理和 系統(tǒng)是 正 確 可行 的 。 關(guān)鍵詞 :機(jī) 器人 ;位置 測量 ;CCD傳 感 器 ;單 目視 覺 ;攝 像 機(jī) 標(biāo) 定 中 圖分 類 號 :TP242.6 文 獻(xiàn) 標(biāo) 識 碼 :B Abstract:A new 3D position measurementmethod Ofa wall—climbing micro robothas been researched.Researc— hing on the various position measuring and controlling method,theauthorhasputforwardanewprojecttomeas— ure the 3D position of the robot,in which the focusing method with singlecamera and CCD sensorhasbeen used to getthe position information.The elementary experiment has verified the principle and the system. Key words:robot;position detection;CCD sensor;single camera vision;camera caiibration 位置測量技 術(shù)是智 能機(jī) 器人 的關(guān)鍵 技術(shù) ,是各 種 機(jī)器人控 制系統(tǒng) 中極 為重 要 的環(huán)節(jié) ,也 是 國內(nèi)外研 究 的熱點(diǎn)所 在。 按 照測試 系統(tǒng) 與被 測機(jī) 器 人 的關(guān) 系 ,可 以將位 置 測量技術(shù) 分為接觸 式和非接觸式 兩大類 。接觸 式測量 系統(tǒng) 由于在測 量過程 中或多或少地 對機(jī)器人施 加 了載 荷 ,因而僅適用于靜 態(tài) 位置測 量 。而動 態(tài) 位 置測量 系 統(tǒng) 主要分 5類 :①激光跟蹤 系統(tǒng) ;@ CCD交 互測量 收 稿 日期 :2001—07—03 基 金項(xiàng) 目:國家 863高科技 研 究 資助 項(xiàng) 目(9804-06);教 育 部 高 等 學(xué)校 骨干教 師 資助 計(jì) 3t,j項(xiàng) 目 作者 簡 介 :張 智海 (1973一 ),男 ,工 學(xué)碩 士 ,主 要 研 究 方 向 為 智 能 機(jī) 器人 測 控 技 術(shù) 。 系統(tǒng) ;③ 超聲波 測量 系統(tǒng) ;④ PSD(positionsensitivede— vice)位 置 測 量 系統(tǒng) ;⑤ 帶 有 接 近覺 傳 感 器 的 測量 系 統(tǒng) 。位置測量 還可 以從另一個分類 角度劃分為主動式 測量和被動 式測 量 。主動式測 量主要可 以分為結(jié) 構(gòu)光方法和激光 自動聚焦法兩類 。被 動式測量 主要 可 以分為雙 目視 覺 、三 目視覺 、單 目視覺 等方法 。 對 比以上各種方法 的 優(yōu)缺 點(diǎn) ,針對 筆者 研制 的微 小爬壁機(jī)器人 的空 間三 維位 置 測量 的要 求 ,測量 系統(tǒng) 必須滿足尺 寸小 、分 辨率 高 、穩(wěn)定 性 和可 靠性 好 、時 間 響應(yīng)快等特 點(diǎn) ,提 出了采用 單 目視覺方法 中的聚焦法 , 選用 CCD作 為傳感器 ,用 三點(diǎn)法實(shí)現(xiàn)對機(jī)器人 的三維 位置測量 ,并用 Matlab和 V

    標(biāo)簽: 機(jī)器人

    上傳時間: 2022-02-12

    上傳用戶:

  • 基于傳感器和模糊規(guī)則的機(jī)器人在動態(tài)障礙環(huán)境中的智能運(yùn)動控制

    基于傳感器和模糊規(guī)則的機(jī)器人在動態(tài)障礙環(huán)境中的智能運(yùn)動控制基于傳感器和模糊規(guī)則的機(jī)器人在動態(tài)障礙環(huán)境中的智能運(yùn)動控制 oIlI~0(、r> 王 敏 金·波斯科 黃心漢 ,O、l、L (華i 面面辜寫j幕.武漢,43074) \I。L上、o 捌要:提出了一種基于傳感器和模糊規(guī)則的智能機(jī)器人運(yùn)動規(guī)劃方法 .該方法運(yùn)用了基于調(diào)和函數(shù)分析的人 工勢能 場原 理 .采用模糊規(guī)則 可減少推導(dǎo)勢能函數(shù)所 必須的計(jì)算 ,同時給機(jī)器人伺服 系統(tǒng)發(fā) 出指令 ,使它能夠 自動 地尋找通向目標(biāo)的路徑.提出的方法具有簡單、快速的特點(diǎn),而且能對 n自由度機(jī)械手的整個手臂實(shí)現(xiàn)最碰.建立 在非線性機(jī)器人動力學(xué)之上的整 個閉環(huán)系統(tǒng)和模糊控制器 的穩(wěn)定性 由李雅普諾 夫原理 保證 .仿真結(jié) 果證明 了該方 法 的有效性 ,通 過比較分析顯示 出文 中所提 出的最障算法的優(yōu)越性 . 美t詞:基于傳感器的機(jī)器人運(yùn)動控制;模糊規(guī)則;人工勢能場;動態(tài)避障;機(jī)器人操作手 1 叫啞oducd0n R。boIsarewjdelyusedfor詛sb inchasma~ia]b柚· 血 , spot : ng, spray Ijl岫 1g, mech卸icaland elec咖 icas搴enlb1y,ma al塒 IIovaland wa時 cut· ring 咖 . ofsuch tasks_堋 llldea pri|柚ary ptd 眥 of 她 ar0botto e oncpositiontoanother withoutbur叩inginto anyobstacles. s 曲km,de. notedasthefDbotm ∞ pJan,liDgp∞ 舶1,hasbeen the倒 娜bj0ct鋤l哪gIeseat℃ll∞ . Every method o0血∞r(nóng)I1ing 如b0tmotionplanninghas itsownadv∞ngesandapplicationdoma~ asweftasits di戤ldvaIIta麟 and constr~dnts. Therefore it would be ratherdifficulteithertoc0Ⅱ】paremethodsorton~ vate thechoio~ofan dl0‘iupon othP~s. 0州 d眥 :1999—07—29;Revised~ :2000一∞ 一絲 In conU~astto many n~ hods,rob

    標(biāo)簽: 傳感器 機(jī)器人

    上傳時間: 2022-02-15

    上傳用戶:

  • S32K144的主從式BMS主控單元設(shè)計(jì)

    目前電動汽車主要以鋰電池作為動力來源,為了提高鋰電池的使用時間和安全性,為鋰電池提供安全良好的運(yùn)行環(huán)境,電池管理系統(tǒng)應(yīng)運(yùn)而生。BMS主控單元基于S32K144汽車級單片機(jī),通過主從式網(wǎng)絡(luò)控制結(jié)構(gòu)能夠?qū)︿囯姵氐母鱾€參數(shù)進(jìn)行采集與分析。采用擴(kuò)展卡爾曼濾波對電池的荷電狀態(tài)(SOC)進(jìn)行估算,克服普通估算方法無法避免電池內(nèi)阻誤差的缺點(diǎn),通過Matlab/Simulink軟件仿真驗(yàn)證可使估算誤差達(dá)到2%以內(nèi)。At present,electric vehicles mainly use lithium batteries as the power source.In order to improve the running time and safety of lithium batteries,a safe and good operating environment for power batteries is provided,and a battery management system(BMS) has emerged.The BMS main control unit is based on the S32K144 automotive-grade control chip.Through the master-slave network control structure,it can collect and analyze the various parameters of the lithium battery.The Extended Kalman Filter(EKF) is used to estimate the state of charge(SOC) of the battery,which overcomes the shortcomings of the internal estimation method that cannot overcome the internal resistance error of the battery.It can be verified by Matlab/Simulink software simulation.The estimation error is within 2%.

    標(biāo)簽: s32k144 bms

    上傳時間: 2022-03-26

    上傳用戶:XuVshu

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