This thesis has discussed the theory of measuring distance in ultrasonic, which include ultrasonic shaking transmit velocity, central frequency, angle of launch control, measure distance, dynamic measure and so on. According to character of wave shape output by circuit, this thesis has designed an efficient way to diminish noise that enables precision of the ultrasonic sensor to 0.2%.

論文詳細(xì)論述了超聲波測(cè)距的基本理論一级特爽A片高潮在线视频，包括超聲波震動(dòng)傳播速度玖玖在线视频网、中心頻率、發(fā)射角控制一区二区的黄色真人美女日B视频、發(fā)射能量18岁以下禁止进入观看黄色网站、檢測(cè)距離、動(dòng)態(tài)檢測(cè)等色哟哟m3u8；并根據(jù)電路輸出波形特征設(shè)計(jì)了有效的降噪方法五月天色开心，使超聲波傳感器的精度達(dá)到了0.2%，然后對(duì)降噪后的信號(hào)進(jìn)行了標(biāo)定色姑娘天天久久综合网久久天天网。

This enables you to centrally define and manage the types of content you store in your site collection.

這使您能夠集中定義和管理等方面的內(nèi)容您在網(wǎng)站集商店国内精品在线观看色导航。

Firstly, oscilloscope control system based on GPIB technique is presented with friendly operation environment to the HIFU system, and it uses multithreading technique in programming to realize real-time recording and display of the signal; Secondly, temperature collection and data recording system is designed, which also could get real-time recording and display of the 16 channel temperature signal, and it's believed to be of great use for further experiments of the HIFU system; Thirdly, multiple ultrasonic phased array's phase shifter is designed,which could provide 8-bit phase control in a range of frequency where the centrical frequency is 1MHZ. Fourthly, the module of serial communication is realized to insure the communication between devices and computer, including both synchronous and asynchronous communication, which enables the system to transfer data reliably and stably; Finally, the module of digital quantity control is accomplished, which provide for upper application the consistent solution to the control of exterior devices via digital interface. It can get or set the devices state using interrupt mode to receive input signal or send output signal.

主要有以下幾個(gè)方面：設(shè)計(jì)了基于GPIB的示波器控制系統(tǒng)，給課題的研究工作提供了一個(gè)良好的環(huán)境黄片在线免费观看无码，它采用了多線程編程的方法99福利超碰，能夠較好的實(shí)時(shí)顯示當(dāng)前波形并記錄數(shù)據(jù)欧美一级欧美三级欧；設(shè)計(jì)了溫度采集和數(shù)據(jù)記錄系統(tǒng)，能夠?qū)?6路溫度信號(hào)進(jìn)行并行同步的實(shí)時(shí)采集性色av夫妻生活片,一级a一级做，用于HIFU劑量學(xué)研究中溫度場(chǎng)檢測(cè)和醫(yī)療評(píng)價(jià)91在线小视频；設(shè)計(jì)了相控陣相位延時(shí)電路并且通過調(diào)試，滿足了課題的相位控制的要求九草免费在线观看，在中心頻率為1MHZ左右的頻率范圍內(nèi)都能夠達(dá)到8-bit相位控制日韩美女偷自拍视频在线观看网站；實(shí)現(xiàn)了串口通訊模塊，為各項(xiàng)設(shè)備與計(jì)算機(jī)之間的通訊提供保證在线无码91超碰，它提供同步和異步的通訊能力日本少妇色一区二区，使系統(tǒng)能夠可靠穩(wěn)定的傳輸數(shù)據(jù)；建立了數(shù)字量控制模塊一级做片爱片久久毛片A片，為上層應(yīng)用程序提供一致的方法使用數(shù)字接口控制外部?jī)x器女人爽到呻吟的在线观看视频，它使用中斷的方式來接收輸入或輸出設(shè)定的開關(guān)量信號(hào)，從而得到或設(shè)定各種儀器的狀態(tài)偷窥盗摄。

This article mainly carries on reconsidering to the uniform circular motion teaching experience,proposed the uniform circular motion teaching first step is enables the student to grasp the uniform circular motion accurately the basic concept,and proposes the solution centripetal acceleration and the centripetal force concept teaching method specifically.

湖北省 鄂州 2 久久免费发布视频。湖北武漢摘要：本文主要對(duì)勻速圓周運(yùn)動(dòng)的教學(xué)經(jīng)驗(yàn)進(jìn)行反思，提出勻速圓周運(yùn)動(dòng)的教學(xué)的第一步是讓學(xué)生準(zhǔn)確掌握勻速圓周運(yùn)動(dòng)的基本概念伊人久久久AⅤ老熟妇二区三区，并具體提出解決向心加速度和向心力概念的教學(xué)的方法国内揄拍国内精品人妻不卡。

After the separation of urine and faeces, the south toward cesspit enables the acceleration the dehydration of faeces.

尿糞分離后，加上糞坑朝南配置糞便容易乾燥在线观看激情无码毛片，縮短無害化堆肥時(shí)間国产1级在线视频网站免费，尿液靜置幾天就可稀釋使用。

An object of the present invention is to provide a technology that enables to determine the cetane number of fuel in a state in which it is actually used for running an internal combustion engine with an improved degree of accuracy.

本發(fā)明的目的是提供一種技術(shù)av国模，以便能夠在實(shí)際運(yùn)行內(nèi)燃機(jī)的狀態(tài)下更準(zhǔn)確地確定燃料的十六烷值国产欧美亚洲日韩片在线观看网站。

Knowledge enables the mental and material champaign to become fertile earth,and every year its products increase by ten times,in this way,it brings us wealth.

知識(shí)會(huì)使精神和物質(zhì)的瘠薄的原野變成肥沃的土地，每年它的產(chǎn)品將以十倍的增長(zhǎng)率六月色色网，給我們帶來財(cái)富做a视频免费在线观看。

Knowledge enables the mental and material champaign to become fertile earth and every year its products increase by ten times in this way it brings us wealth.

知識(shí)會(huì)使精神和物質(zhì)的磽薄的原野變成肥沃的土地，每年它的產(chǎn)品將以十倍的增長(zhǎng)率欧州色色，給我們帶來財(cái)富无码一级午夜福利2021。

Teen online dating also enables you to chance upon people whom you may never have met otherwise.

青少年網(wǎng)上約會(huì)也可以讓您有機(jī)會(huì)的人后，您可能從未滿足日韩精品福利资源网站大全免费，否則www的网址免费看。

It's another kind of spirit, enables me to chant quietly

那是另一種精神，讓我可以靜靜地吟唱