-
The radially averaged power spectrum (RAPS) is the direction-independent mean spectrum, i.e. the average of all possible directional power spectra. This function computes and plots the RAPS of an input image. The function was written to produce the RAPS for square weather radar reflectivity images so you will have to relabel the plot axes and title to suit your needs. The radially averaged power spectrum provides a convenient means to view and compare information contained in 2D spectra in 1D
標(biāo)簽：
spectrum
direction-independent
i.e.
the
上傳時(shí)間：
2013-12-17
上傳用戶：watch100
-
Smartphones have become a key element in providing greater user access to the
mobile Internet. Many complex applications which used to be limited to PCs, have
been developed and operated on smartphones. These applications extend the
functionalities of smartphones, making them more convenient for users to be
connected. However, they also greatly increase the power consumption of
smartphones, making users frustrated with long delays in Web browsing.
標(biāo)簽：
Browsing
Mobile
Cloud
Using
Web
the
上傳時(shí)間：
2020-05-30
上傳用戶：shancjb
-
Electricity has been chosen as the most convenient and useful form of energy, due
to its ease of transportation over large distances and easy conversion to other
energy forms. The biggest inconvenience with electricity is that it cannot be stored
and must be utilized at the moment of generation. The storage of a large amount of
electrical energy is usually connected with its conversion to other types of energy,
which significantly reduces the efficiency of such processes. The aim of the power
system, often treated as the biggest and the most complex machine ever built, is to
deliver uninterruptible electric energy of demanded quality parameters to
consumers.
標(biāo)簽：
Electromagnetic
Interference
Conducted
上傳時(shí)間：
2020-06-07
上傳用戶：shancjb
-
I am presenting this novel book on advances and trends in power electronics and motor
drives to the professional community with the expectation that it will be given the same
wide and enthusiastic acceptance by practicing engineers, R&D professionals, univer-
sity professors, and even graduate students that my other books in this area have. Unlike
the traditional books available in the area of power electronics, this book has a unique
presentation format that makes it convenient for group presentations that use Microsoft’s
PowerPoint software. In fact, a disk is included that has a PowerPoint file on it that is
ready for presentation with the core figures. Presentations can also be organized using
just selected portions of the book
標(biāo)簽：
Electronics
Advances
Drives
Power
Motor
And
上傳時(shí)間：
2020-06-10
上傳用戶：shancjb
-
PW4203 is a 4.5-22V input, 2A multi-cell synchronous Buck Li-Ion battery charger, suitable forportable application. Select pin is convenient for multi-cell charging. 800 kHz synchronous buckregulator integrates of 22V rating FETs with ultra low on- resistance to achieve high efficiency andsimple circuit design.The PW4203 is available in an 8-pin SOP package, provides a very compact system solution andgood thermal conductance
標(biāo)簽：
pw4203
上傳時(shí)間：
2022-02-11
上傳用戶：
-
在半導(dǎo)體制冷技術(shù)的工作性能及其優(yōu)缺點(diǎn)研究的基礎(chǔ)上,設(shè)計(jì)了以單片機(jī)為核心控制元件,以TEC1-12706為執(zhí)行元件的半導(dǎo)體制冷溫度控制系統(tǒng)。采用高精度分段式PID控制算法配合PWM輸出控制的方法實(shí)現(xiàn)溫度控制;選擇數(shù)字傳感器DS18B20為溫度檢測(cè)元件,還包含1602液晶顯示模塊、按鍵調(diào)整輸入模塊和H橋驅(qū)動(dòng)模塊等。實(shí)際測(cè)試表明,該系統(tǒng)結(jié)構(gòu)簡(jiǎn)單易行,操作方便,工作性能優(yōu)良,同時(shí)針對(duì)該系統(tǒng)專門(mén)設(shè)計(jì)的溫控算法,使半導(dǎo)體制冷器能更好地適應(yīng)不同工況而充分發(fā)揮其制冷制熱工作特性。Based on the study of the performance and advantages and disadvantages of thermoelectric cooler(TEC)technology,a thermoelectric cooling temperature control system with single-chip microcomputer as the core control element and TEC1-12706 as the executive element was designed. High precision piecewise PID control algorithm combined with PWM output control method is adopted to realize temperature control. The digital sensor DS18B20 is selected as the temperature detection element. It also includes 1602 LCD module,key adjustment input module and H bridge drive module. The actual test shows that the system has simple structure,convenient operation and excellent performance. Meanwhile,the temperature control algorithm specially designed for the system can make the semiconductor cooler better adapt to different working conditions and give full play to its refrigeration and heating characteristics.
標(biāo)簽：
半導(dǎo)體
溫度控制系統(tǒng)
上傳時(shí)間：
2022-03-27
上傳用戶：
-
溫度控制如今已成為當(dāng)代社會(huì)研究的熱點(diǎn)之一,而溫度檢測(cè)在現(xiàn)代設(shè)備參數(shù)檢測(cè)中也是一項(xiàng)極其重要的技術(shù),應(yīng)用十分廣泛。與傳統(tǒng)的測(cè)溫方法相比,紅外測(cè)溫方法具有時(shí)間短、精度高、使用簡(jiǎn)單方便等優(yōu)點(diǎn)。本文以環(huán)境溫度為被測(cè)對(duì)象,設(shè)計(jì)了以STC89C52單片機(jī)為控制中心的紅外測(cè)溫裝置,能夠?qū)崿F(xiàn)對(duì)目標(biāo)溫度的實(shí)時(shí)采集、處理、顯示和報(bào)警等功能。本設(shè)計(jì)主要是由STC89C52單片機(jī)、紅外測(cè)溫傳感器、LCD1602液晶顯示器、按鍵和蜂鳴器等部分組成,采用非接觸的方式對(duì)目標(biāo)溫度進(jìn)行實(shí)時(shí)檢測(cè)。Temperature control has become one of the hotspots in contemporary social research,and temperature detection is an extremely important technology in modern equipment parameter detection.Compared with traditional method,the infrared temperature measuring method has advantages of short time,high precision and convenient operation,etc.This paper consider environment temperature as research objects and designs an infrared temperature measuring device which employs the STC89C52singlechipas-control center,and it can realize timely collection,processing,display and alarm function of the target temperature.The design is mainly composed of STC89C52 singlechip,infrared temperature sensor,LCD1602monitor,keys and buzzer,etc.This design detects the target temperature by non-contact method.
標(biāo)簽：
單片機(jī)
紅外測(cè)溫
上傳時(shí)間：
2022-03-27
上傳用戶：jiabin
-
文章提出了一種基于AT89S51單片機(jī)的智能家居系統(tǒng)的設(shè)計(jì),該系統(tǒng)具有室內(nèi)煤氣以及煙霧的檢測(cè)、家庭室內(nèi)防盜等功能。文章詳細(xì)分析了系統(tǒng)的總體設(shè)計(jì),詳盡分析并設(shè)計(jì)了煤氣傳感器模塊、煙霧傳感器模塊、人體紅外感應(yīng)傳感器模塊、報(bào)警模塊等各硬件部分,并利用PROTUES軟件進(jìn)行了系統(tǒng)仿真。仿真結(jié)果證明:系統(tǒng)具有成本低、效率高、操作方便等優(yōu)點(diǎn),達(dá)到了預(yù)期設(shè)計(jì)的效果。This paper presents the design of an intelligent home system based on AT89S51 microcontroller.The system has the functions of detecting indoor gas and smoke,guarding against theft in the home,and so on.The overall design of the system is analyzed in detail.The gas sensor module,smoke sensor module,human infrared sensor module,alarm module and other hardware parts are analyzed and designed in detail,and the system simulation is carried out using PROTUES software.The simulation results show that the system has the advantages of low cost,high efficiency,convenient operation and so on,and achieves the expected design effect.
標(biāo)簽：
單片機(jī)
智能家居
上傳時(shí)間：
2022-03-28
上傳用戶：
-
該系統(tǒng)描述無(wú)線功率傳輸是出版的力量，無(wú)線通信聯(lián)合體采用無(wú)線力量聯(lián)盟與 convenient Power有限公司密切合作，富爾頓創(chuàng)新公司、國(guó)家半導(dǎo)體公司，諾基亞公司，奧林匹斯成像公司、研究、限制、飛利浦、三洋電子公司。深圳桑菲消費(fèi)通信有限公司。菲德州儀器有限公司保留所有能量。復(fù)制在全部或部分地是被禁止的明示和優(yōu)先的書(shū)面允許的無(wú)線能力聯(lián)盟免責(zé)聲明本網(wǎng)站內(nèi)所包含的信息是正確之日出版。然而，無(wú)線的力量，也 convenient Power協(xié)會(huì)有限公司富爾頓創(chuàng)新公司和國(guó)家諾基亞公司半導(dǎo)體公司、企業(yè)、科研、奧林匹斯成像議案有限公司、飛利浦、三洋電子公司。深圳桑菲消費(fèi)通信有限公司。德州儀器有限公司，也將承擔(dān)任何損失，包括間接的或間接的從使用這個(gè)系統(tǒng)描述無(wú)線功率傳輸或依據(jù)。本文件的準(zhǔn)確性無(wú)觸點(diǎn)電力傳輸?shù)姆椒◤囊粋€(gè)基站移動(dòng)設(shè)備，它是基于近場(chǎng)磁感應(yīng)線圈之間。轉(zhuǎn)移的功率大約5W采用適當(dāng)?shù)亩尉恚ǖ湫偷耐獠看蠹s40毫米）的尺寸。操作頻率范圍：110-205HZ之間。支持兩種方法在移動(dòng)設(shè)備上放置在基站的表面。幫助用戶指引正確位置的移動(dòng)設(shè)備在表面形成一層。通過(guò)基站提供一個(gè)或幾個(gè)固定位置的表面。任意位置可以免費(fèi)定位的移動(dòng)設(shè)備上表面形成一層可提供電力基站位置通過(guò)任何表面。一個(gè)簡(jiǎn)單的通信協(xié)議使移動(dòng)設(shè)備能夠充分的控制能力轉(zhuǎn)讓。可觀的設(shè)計(jì)系統(tǒng)的靈活性為整合成一個(gè)移動(dòng)的裝置。非常低的備用電源（執(zhí)行），可依賴安裝1.3一致性和參本文檔中所有的規(guī)定除非特別指出，以及其他推薦或隨意或信息。為了避免任何疑惑，“應(yīng)當(dāng)”表示個(gè)強(qiáng)制性的行為的指定的成分如下。它是一種違反這一系統(tǒng)的無(wú)線通信電源轉(zhuǎn)換描述指定的成分不具有行為所起義的此外“應(yīng)該？示推的行少下它不是種違反這一系統(tǒng)的描如果指定的無(wú)線功率傳輸組件都有理由偏離的定義行為。最后這個(gè)詞“可能”表示一個(gè)可選的行為的特定組件如下。它是到指定的成分是否具有明確的行為（從）或無(wú)偏差不是。此外在這個(gè)文件中提供的規(guī)格還應(yīng)當(dāng)符合產(chǎn)品實(shí)現(xiàn)在系統(tǒng)提供的規(guī)格說(shuō)明如下。而且，相關(guān)的部分下面列出適用的國(guó)際標(biāo)準(zhǔn)。如果多個(gè)修改任何系統(tǒng)的存在描述或國(guó)際標(biāo)準(zhǔn)適用于下面列出的是那個(gè)被修改在最近出版的發(fā)布日期的單據(jù)。
標(biāo)簽：
無(wú)線充電
上傳時(shí)間：
2022-03-31
上傳用戶：20125101110
-
超聲波換能器作為一種實(shí)用的檢測(cè)手段，能實(shí)現(xiàn)聲波所攜帶的信息和電能之間轉(zhuǎn)換。它的性能優(yōu)良，價(jià)格低廉，操作方便，易于調(diào)試，因此在工農(nóng)業(yè)生產(chǎn)中發(fā)揮著重要的作用。但目前換能器驅(qū)動(dòng)電路的發(fā)射頻率多為40 kHz，本文針對(duì)1 MHz的超聲波換能器電路進(jìn)行了設(shè)計(jì)，主要介紹了它的發(fā)射驅(qū)動(dòng)電路和接收驅(qū)動(dòng)電路的設(shè)計(jì)方案，并對(duì)它們的功能進(jìn)行了詳細(xì)地說(shuō)明。最后搭建實(shí)驗(yàn)平臺(tái)，并對(duì)電路的輸入、輸出模塊進(jìn)行了測(cè)試。實(shí)驗(yàn)結(jié)果表明，換能器電路運(yùn)行良好，可以為超聲波高精度測(cè)量領(lǐng)域的應(yīng)用提供參考。As a practical means of detection, ultrasonic transducer can realize the conversion between theinformation carried by sound wave and electric energy.It has the advantages of excellent performance,low cost, convenient operation and debugging, so plays an important role in industrial and agriculturalproduction.However, the transmitting frequency of the driving circuit for most transducer is 40 kHz.Thecircuit of 1 MHz ultrasonic transducer is designed In this paper. It mainly introduces the emissive drivingcircuit and the receiving circuit design and the detailed function of them. Finally, the experimentalplatform is built, and the circuit of input and output were tested. Experiments show that the transducer＇ s...
標(biāo)簽：
換能器
驅(qū)動(dòng)電路
上傳時(shí)間：
2022-04-28
上傳用戶：
