In this paper we present a classifier called bi-density twin support vector machines (BDTWSVMs) for data classification. In the training stage, BDTWSVMs first compute the relative density degrees for all training points using the intra-class graph whose weights are determined by a local scaling heuristic strategy, then optimize a pair of nonparallel hyperplanes through two smaller sized support vector machine (SVM)-typed problems. In the prediction stage, BDTWSVMs assign to the class label depending on the kernel density degree-based distances from each test point to the two hyperplanes. BDTWSVMs not only inherit good properties from twin support vector machines (TWSVMs) but also give good description for data points. The experimental results on toy as well as publicly available datasets indicate that BDTWSVMs compare favorably with classical SVMs and TWSVMs in terms of generalization
標(biāo)簽： recognition Bi-density machines support pattern vector twin for
上傳時(shí)間： 2019-06-09
上傳用戶：lyaiqing
Digital cellular telecommunications system (Phase 2+); Technical realization of the Short Message Service (SMS) Point-to-Point (PP) (3GPP TS 03.40 version 7.5.0 Release 1998)
標(biāo)簽： GSM
上傳時(shí)間： 2019-06-14
上傳用戶：twogozi
The objective of this book is to allow the reader to predict the received signal power produced by a particular radio transmitter. The first two chapters examine propagation in free space for point-to-point and point-to-area transmission, respectively. This is combined with a dis- cussion regarding the characteristics of antennas for various purposes. In chapter 3, the effect of obstacles, whether buildings or mountains, is discussed and analytical methods, whereby the strength of a signal is the shadow of an obstacle can be predicted, are presented.
標(biāo)簽： Propagation Essentials Radio Wave of
上傳時(shí)間： 2020-05-27
上傳用戶：shancjb
Wireless means different things to different people. For this book, it refers to the radio systems that provide point-to-point, point-to-multipoint, and Earth-space communications over transmission links that propagate outside buildings through the lower atmosphere. Wireless systems are being built that provide data transmission between computers and other devices on one’s own desk. These are part of the wireless world but not the part where, except for interference perhaps, the atmosphere has any influence. The intent of this book is to provide a description of the physical phenomena that can affect propagation through the atmosphere, present sample measurements and statistics, and provide models that system designers can use to calculate their link budgets and estimate the limitations the atmosphere may place on their design.
標(biāo)簽： Communication Propagation Handbook Wireless for
上傳時(shí)間： 2020-05-31
上傳用戶：shancjb
The book is written for those concerned with the design and performance of satellite communications systems employed in fixed point-to-point, broadcasting, mobile, radio- navigation,data-relay,computercommunications,andrelatedsatellite-basedapplications.The recentrapidgrowthinsatellitecommunicationshascreatedaneedforaccurateinformationon both satellite communications systems engineering and the impact of atmospheric effects on satellite link design and system performance. This book addresses that need for the first time in a single comprehensive source.
標(biāo)簽： Communications Satellite Systems
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
Telecommunications is today widely understood to mean the electrical means of communicating over a distance. The first form of telecommunications was that of the Telegraph, which was invented quite independently in 1837 by two scientists, Wheatstone and Morse. Telegraphy was on a point-to-point unidirectional basis and relied on trained operators to interpret between the spoken or written word and the special signals sent over the telegraph wire. However, the use of telegraphy did greatly enhance the operations of railways and, of course, the dissemination of news and personal messages between towns.
標(biāo)簽： Telecommunications Understanding Networks
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
歐母龍PLC例程PLC控制器源碼255個(gè)合集:1600T俄羅斯壓力機(jī).rar200噸壓機(jī)程序 omron 的機(jī)子C系列的.rar3MK136舊磨床現(xiàn)程序.rar3電機(jī)延時(shí)控制啟停.rar5V編碼器信號(hào)如何接入CP1H高數(shù)計(jì)數(shù)案例.rar6路搶答器源碼.rar902002 OMRON.rarASCII Generic Protocol Macro Object Code.zipASCII Generic Protocol Macro.zipC3電樞異物吸引.rarCalendar Calculation.zipcarbon.rarCompact Flash Memory Write.zipCounter Multiplex.zipcp1h 高速計(jì)數(shù)觸發(fā)中斷注意點(diǎn).rarcp1h-x40用在非標(biāo)飲料線上的程序,有注解.rarCP1H與愛默生溫控模塊的通訊程序.rarCP1L and CP1H EasyModbus FB.zipCPM1A編寫的贊揚(yáng)15T立式注塑機(jī).rarCPM2A Interupt High Speed Counting Sample.zipCPM2A自身時(shí)鐘六個(gè)時(shí)間段觸發(fā)程序.rarCQM1 Host Link Master.zipCQM1H 21的例子程序，有溫度壓力等PID控制。.rarCQMaster.swp.zipCS CJ CP NSJ password set.zipCS1 C Mode Hostlink.zipCS1-CJ1 Floating Point to Fixed Point Conversion for HMI.zipcub.rarCX-Programmer Ver.5 Introduction Guide R120-E1-01..zipCX-Programmer Ver.5 Introduction to Function Blocks Guide R121-E1-01.zipC_Mode_Hostlink.zipDeviceNet Explicit Message Example.zipdieban.rarEasy to use Modbus RTU Master for CP1L CP1H CJ1 CJ2 CS1.zipExample of Using Daylight Saving FB's.zipExample Scale Meter Protocol.zipFB Calculate Day Of Week.zipFB Day light savings function block.zipFB Extract Time Date into SecMin Hr Day Mth Yr.zipFB Scale with parameters.zipGKF1250離心機(jī)CXP.rargkf1250離心機(jī)cxpgkf離心機(jī)omron.rarJH21-200程序.rarLED液壓機(jī).rarlogging+ filewrite.ziplpr-des.rarModbus Protocol Macro Object Code.zipModbus Protocol Macro.zipModbus RTU Sample Code CJ1-SCB.rarModbus TCP Client using FB's.zipOmron CS1 Sequencer.zipOMRON E6CP絕對(duì)值編碼器使用實(shí)例。編碼器為8位格雷碼輸出.rarOmron Modbus Slave Ladder.zipOmron Plc 變頻一帶三例程.rarOMRON PLC編程示范.raromron--MOV傳送指令.raromron-cs1g-h-cpu42日本機(jī)的程序.rarOmron_CJ2_to_AB_EIP_Tag_Datalink_Example.rarOMRON接駁臺(tái).rarOMRON控制2伺服.rarOMRON溫度，壓力模擬量輸入程序.rarOMRON照明設(shè)備程序.raromron的PLC案例程序.rarOMRON程序舉例.rarOMRON程序舉例2.rarOMRON紙病分析系統(tǒng)-PLC程序(CJ1G).zipomron脈沖輸出到驅(qū)動(dòng)器的程序.rarPCB 沉銅線程序.rarPID溫度控制的PLC程序設(shè)計(jì)實(shí)例.rarPinstamp.zipPLC Clock adjustment with screen.zipPLC錳鋼程序cpm2a.zipPolls and Writes setpoints to E5CK Process Controller - E5CK.swp.zipPRO9連拉.rarProcess states sequence logics.zipQuadrature Input for Standard CPM1A DC Inputs.zipRandom Number Generator.zipScaling in CJ1 CS1 PLC's.zipSMS - GSM PLC Communications.zipsony 公司 某機(jī)臺(tái)控制程序.rarStepNext.cpt.zipSTUP Example.zipTemplate for Step-Step Next Sequence.zipToggle Button.zipTracking product on conveyor.zipTXD-RXD Quickstart Programs.zipTXD-RXD Serial Port Handling.zipUseable timer.zipV600-E5CK.zipV700-V720 RFID Protocol Macro.zipVB與OMRON PLC通訊源碼.rarWoodwood Controler Example Protocol Program.zipYH32-315油壓機(jī)程序.rar一個(gè)CJ1M的程序.rar一個(gè)OMRON程序,帶位置控制模塊.rar一個(gè)生產(chǎn)線上潤(rùn)滑控制的小程序.rar一些簡(jiǎn)單的cpm1a程序.rar一控三恒壓供水程序.rar三層提升機(jī)歐姆龍CQM1H程序.rar三菱400噸和200號(hào)沖床程序.rar上海產(chǎn)自動(dòng)模切機(jī)飛達(dá)部程序.zip上海獅印全自動(dòng)啤機(jī)程序.rar東芝壓鑄機(jī)梯形圖.rar兩步法吹瓶機(jī).rar鄉(xiāng)林剪臺(tái).rar買書的隨書樣例.rar井研磨邊機(jī).rar交通燈注釋全.rar今機(jī)立式注塑機(jī)程序.rar伺服電機(jī)正反轉(zhuǎn)控制.rar位置控制（旋轉(zhuǎn)編碼器與PLC）.rar充磁機(jī)程序.rar先啟后停 后啟先?！∈吕?rar沖床程序.rar分揀線主機(jī)一個(gè)CJ1M的分揀線程序下掛CP1H.rar利慧利樂灌裝機(jī)程序.rar刮水器停止位置檢查程序.rar力泰翻胚機(jī)程序.rar北人04印刷機(jī)程序.rar北人LQD10騎馬裝訂程序.rar半自動(dòng)吹瓶機(jī)的程.rar南京印刷機(jī).zip卡板程式.rar壓制機(jī)程序（帶解釋，注釋）.rar壓力機(jī)控制程序.rar原創(chuàng)液壓機(jī)程序帶注釋歐姆龍PLC加信捷文本.rar原點(diǎn)搜索程序.rar雙翻分揀機(jī).rar雙邊機(jī).rar反滲透整套PLC控制.rar臺(tái)灣產(chǎn)染色機(jī)歐姆龍PLC帶3只IO擴(kuò)展控制程序.rar臺(tái)灣大拉無板.rar啤酒廠酒瓶美容機(jī).rar四川綿陽建豐熱磨工段.rar在用設(shè)備程序.rar垂直涂布.rar外端子設(shè)計(jì)數(shù)值.rar大型熱電廠 PLC程序(帶注解).rar大搖動(dòng)超聲波清洗機(jī).rar大連75密練注釋程序.rar安呼12級(jí).rar富佳扶梯程序.rar對(duì)齊度編程?。?rar小車控制程序.rar小車送料”例程.rar廣東鍛壓氣壓沖床程序（80T）有詳細(xì)注解.rar廣告牌燈箱.rar微電機(jī)刷簧自動(dòng)組裝程序.rar微粉磚自動(dòng)送料帶OMRON CQM2A+擴(kuò)展程序帶注釋.rar意大利進(jìn)口皮革壓花.rar扎鋼機(jī)程序.rar打包機(jī).rar拔蓋機(jī).rar撥碼控制.rar擋磚磨邊機(jī)（新1）.rar捷豹空壓機(jī)控制程序.rar接木機(jī).rar控制程序例子.rar推掛.rar攻絲機(jī)2（新）.rar料位顯示.rar旋轉(zhuǎn)門控制程序1.rar無協(xié)議.rar無心磨床(OMRON系統(tǒng),帶機(jī)械手有詳細(xì)注解).rar無線膠裝機(jī)歐姆龍程序.zip日本人編的程序 拋光研磨.rar日本成型磨床控制程序（附注釋）歐姆龍CPM1A.rar板坯定厚.rar樣例，有注釋.rar模擬量試驗(yàn).rar歐姆龍CJ1M鉻化機(jī)程序帶注釋.rar歐姆龍CP1H例程.rar歐姆龍CPM1A的PLC.rar歐姆龍CPM2AH PLC和歐姆龍NTZ觸摸屏編寫的超聲波清洗機(jī)程序..rar歐姆龍CPM2AH Host Link通訊程序(發(fā)布源碼).rar
上傳時(shí)間： 2021-10-22
上傳用戶：
特點(diǎn)： 精確度0.1%滿刻度 可作各式數(shù)學(xué)演算式功能如:A+B/A-B/AxB/A/B/A&B(Hi or Lo)/|A|/ 16 BIT類比輸出功能 輸入與輸出絕緣耐壓2仟伏特/1分鐘(input/output/power) 寬范圍交直流兩用電源設(shè)計(jì) 尺寸小,穩(wěn)定性高
標(biāo)簽： 微電腦 數(shù)學(xué)演算 隔離傳送器
上傳時(shí)間： 2014-12-23
上傳用戶：ydd3625
開關(guān)在電路中起接通信號(hào)或斷開信號(hào)的作用。最常見的可控開關(guān)是繼電器，當(dāng)給驅(qū)動(dòng)繼電器的驅(qū)動(dòng)電路加高電平或低電平時(shí)，繼電器就吸合或釋放，其觸點(diǎn)接通或斷開電路。CMOS模擬開關(guān)是一種可控開關(guān)，它不象繼電器那樣可以用在大電流、高電壓場(chǎng)合，只適于處理幅度不超過其工作電壓、電流較小的模擬或數(shù)字信號(hào)。 一、常用CMOS模擬開關(guān)引腳功能和工作原理 1.四雙向模擬開關(guān)CD4066 CD4066 的引腳功能如圖1所示。每個(gè)封裝內(nèi)部有4個(gè)獨(dú)立的模擬開關(guān)，每個(gè)模擬開關(guān)有輸入、輸出、控制三個(gè)端子，其中輸入端和輸出端可互換。當(dāng)控制端加高電平時(shí)，開關(guān)導(dǎo)通；當(dāng)控制端加低電平時(shí)開關(guān)截止。模擬開關(guān)導(dǎo)通時(shí)，導(dǎo)通電阻為幾十歐姆；模擬開關(guān)截止時(shí)，呈現(xiàn)很高的阻抗，可以看成為開路。模擬開關(guān)可傳輸數(shù)字信號(hào)和模擬信號(hào)，可傳輸?shù)哪M信號(hào)的上限頻率為40MHz。各開關(guān)間的串?dāng)_很小，典型值為－50dB。
標(biāo)簽： CMOS 模擬開關(guān) 工作原理
上傳時(shí)間： 2013-10-27
上傳用戶：bibirnovis
減小電磁干擾的印刷電路板設(shè)計(jì)原則 內(nèi) 容 摘要……1 1 背景…1 1.1 射頻源.1 1.2 表面貼裝芯片和通孔元器件.1 1.3 靜態(tài)引腳活動(dòng)引腳和輸入.1 1.4 基本回路……..2 1.4.1 回路和偶極子的對(duì)稱性3 1.5 差模和共模…..3 2 電路板布局…4 2.1 電源和地…….4 2.1.1 感抗……4 2.1.2 兩層板和四層板4 2.1.3 單層板和二層板設(shè)計(jì)中的微處理器地.4 2.1.4 信號(hào)返回地……5 2.1.5 模擬數(shù)字和高壓…….5 2.1.6 模擬電源引腳和模擬參考電壓.5 2.1.7 四層板中電源平面因該怎么做和不應(yīng)該怎么做…….5 2.2 兩層板中的電源分配.6 2.2.1 單點(diǎn)和多點(diǎn)分配.6 2.2.2 星型分配6 2.2.3 格柵化地.7 2.2.4 旁路和鐵氧體磁珠……9 2.2.5 使噪聲靠近磁珠……..10 2.3 電路板分區(qū)…11 2.4 信號(hào)線……...12 2.4.1 容性和感性串?dāng)_……...12 2.4.2 天線因素和長(zhǎng)度規(guī)則...12 2.4.3 串聯(lián)終端傳輸線…..13 2.4.4 輸入阻抗匹配...13 2.5 電纜和接插件……...13 2.5.1 差模和共模噪聲……...14 2.5.2 串?dāng)_模型……..14 2.5.3 返回線路數(shù)目..14 2.5.4 對(duì)板外信號(hào)I/O的建議14 2.5.5 隔離噪聲和靜電放電ESD .14 2.6 其他布局問題……...14 2.6.1 汽車和用戶應(yīng)用帶鍵盤和顯示器的前端面板印刷電路板...15 2.6.2 易感性布局…...15 3 屏蔽..16 3.1 工作原理…...16 3.2 屏蔽接地…...16 3.3 電纜和屏蔽旁路………………..16 4 總結(jié)…………………………………………17 5 參考文獻(xiàn)………………………17
標(biāo)簽： 印刷電路板 設(shè)計(jì)原則
上傳時(shí)間： 2013-10-24
上傳用戶：18165383642
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