freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內容

畢業(yè)設計-基于單片機的指紋識別系統(tǒng)設計-wenkub.com

2025-01-10 04:27 本頁面
   

【正文】 ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jump When he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him pletely. If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。 Have declared the end of the encounter that haven39。那些曾經所謂的非做不可,只是青蔥年華里自己給自己注射的一支強心劑,或者說,是自以為是的精神寄托罷了。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個人的時候,自己的想法總是特別地清晰。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。 The end of our life, and can meet many things really do? 22 而窮盡我們的一生,又能遇到多少事情是真正地非做不可? During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it. 一字開頭的年齡已經到了尾聲。s 21 win. Michel Platini, president of European football39。s antiracism taskforce, is in London for the Football Association39。t agree with the disciplinary action your employer has taken against you ? your employer dismisses you and you think that you have been dismissed unfairly. For more information about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。本設計由于水平有限,電路及程序設計還有需要改進的地方,在今后的學習和研究中,將繼續(xù)改進完善。系統(tǒng)可廣泛應用月各類企業(yè)考勤應用。在中斷服務子程序中,將接收到的字節(jié)數存入 R7 中,接收的數據存入片外 RAM 從 1000H 開始的單元中。為了改善紋波特性,在輸入端外接電容,一般 iC取值為 0. 33uF,并緊接在穩(wěn)壓塊的輸入端;在輸出端連接電容 0C ,這樣可以改善輸出電壓的紋波特性,一般 0C 選為 0. 1 uF 。 指紋識別系統(tǒng)工作原理圖 16 指紋識別系統(tǒng)硬件電路設計 本系統(tǒng)采用 8051 作為指紋識別系統(tǒng)的核心處理器,使用單片機內部的 4K 程序存儲器,接 +5V 電源。 15 指紋識別系統(tǒng)工作原理及硬件特性 工作原理:當指紋傳感器收到指紋信息,將通過串口給單片機發(fā)送命令,單片機同意并接收相應的信息,指紋傳感器采集的指紋轉換成 RGB 格式,并且數據傳輸到單片機,單片機通過存儲在 EEPROM 中的固化程序執(zhí)行大量的模式識別和圖像處理相關計算,當用戶的指紋被確認,單片機將命令執(zhí)行機構動作,開關開。一般,指紋自動識別系統(tǒng)將指紋分為弓形紋(弧形紋、帳形紋)、箕形紋(左箕、右箕) 斗形紋和雜形紋等。 指紋圖像處理:包括指紋區(qū)域檢測、圖像質量判斷、方向圖和頻率估計、圖像增強、指 紋圖像二值化和細化等。根據采集指紋面積大體可以分為滾動捺印指紋和平面捺印指紋,公安行業(yè)普遍采用滾動捺印指紋。通過計算機模糊比較的方法,把兩個指紋的模板進行比較,計算出它們的相似程度,最終得到兩個指紋的匹配結果。空閑模式下, CPU 暫停工作,而 RAM 定時計數器,串行口,外中斷系 統(tǒng)可繼續(xù)工作, 128x8bit內部 RAM,能滿足設計要求。 系統(tǒng)結構框圖 指紋識別功能描述 基于單片機 8051 的指紋識別系統(tǒng)是由 8051 處理器、 68128RAM和 EEPROM 芯片等構成,具有指紋錄入、圖像處理、指紋對比、搜索 傳 感 器 MCU RAM EEPROM PC 13 和模版儲存等功能的智能型模塊。其結構框圖如圖所示。 指紋識別系統(tǒng)串行口工作方式 SM0 SM1 工作方式 說 明 波特率 0 0 方式 0 同步移位寄存器 fosc/12 0 1 方式 1 10 位異步收發(fā)器 由定時器控制 1 0 方式 2 11 位異步收發(fā)器 fosc/32 或 fosc/64 1 1 方式 3 11 位異步收發(fā)器 由定時器控制 串行口工作方式 8051 單片機的串行口是一個可同時接受數據和發(fā)送數據全雙工的接口,該串行口可以設定四種工作方式:移位寄存器(方式 0) 8位數據 UART 方式(方式 1) 9 位數據波特率固定 UART 方式(方式2) 9 位數據位波特率可變 UART 方式(方式 3)。 在利用 VC 開發(fā)程序之前應先安裝 FDU2022 指紋儀的 SDK。這些斷點、分叉點和轉折點就稱為特征點 ,就是這些特征點提供了指紋惟一性的確認信息,其中最典型的是終結點和分叉點,其他還包括分歧點、孤立點、環(huán)點、短紋等。在計算指紋的紋路時,一般 10 先連接核心點和三角點,這條連線與指紋紋路相交的數量即可認為是指紋的紋數。許多算法是基于核心點的,即只能處理和識別具有核心點的指紋。 紋形根據脊線的走向與分布情況一般將指紋分為三大類 —— 環(huán)型( loop,又稱斗形)、弓形( arch)、螺旋形( whorl)。在系統(tǒng)的整體方案確定之前 ,先要明確設計要求,然后對系統(tǒng)硬件、軟件進行設計,其中包括繪制原理框圖、電路圖,對原理進行必要說明,綜合考慮系統(tǒng)的性能和穩(wěn)定性要求,以保證所設計的系統(tǒng) 達到預期的
點擊復制文檔內容
規(guī)章制度相關推薦
文庫吧 www.dybbs8.com
備案圖片鄂ICP備17016276號-1