換頻機 的英文怎麼說
中文拼音 [huànbīnjī]
換頻機
英文
inverted frequency converter-
This is a computerised voice communication system between pilots and air traffic controllers, and between air traffic control positions in the air traffic control centre, aerodrome control tower, rescue coordination centre and aeromobile centre by using pre - set switching and distribution of various aeronautical frequencies and direct communication lines. the new computerised system will enhance the overall efficiency in communications
讓機師與管制員之間，或航空交通管制中心、指揮塔、援救協調中心和航空通訊中心內各不同管制崗位之間，能用預先設定的系統作直接通話，包括可轉換和發布的航空通訊頻道和直接通訊線路等。Instead of calling aitken transform repeatedly, the improved algorithm call aitken transform in choosing proper occasion only once
與原演算法相比，改進演算法不頻繁調用aitken變換，而執行選擇適當時機對aitken變換調用一次的策略。300 75 balun for fm and tv broadcast receiver
調頻電視廣播接收機用300 75平衡-不平衡阻抗變換器The control system included the following units : video decode unit, data format conversion unit, fpga controller, cache unit and d / a monitor. the above self - design control unit plus row and column power supply units make the whole fed driving system, thus drove the 25 inch sample and realized color video display. the 25 inch vga sample thus fabricated could display video images, and obtained its brightness 400cd / m2, contrast ratio 1000 : 1, 256 circuit gray scale
本文介紹了fed驅動系統的工作原理，重點論述了基於fpga的vga級彩色fed新型驅動控制系統的研製，這種新型fed驅動控制系統主要包括視頻解碼電路、數據格式轉換電路、 fpga控制電路、數據緩存電路和d / a監控電路，配合后級列灰度調制單元和行掃描單元，組成完整的fed驅動系統，可以驅動25英寸vga級fed顯示屏，實現彩色視頻顯示，樣機亮度達400cd / m2 、對比度為1000 : 1 ，灰度等級為256級。Putting cameras on top of tv sets to monitor viewer behaviour found that a good show might get 64 per cent of the audience paying attention in the break rather than zapping, chatting or making a cuppa, compared with 20 per cent for less involving programming
在電視機上放一個攝像頭監測觀眾的行為就會發現，一檔好節目能吸引64 %的觀眾關注廣告時間，而不是到了播廣告時就轉換頻道，聊天或去泡茶；相比之下，一個不那麼吸引人的節目就只能得到20 %的觀眾。Design of dtv logo inserter based on video transcoding
基於視頻轉換編碼的數字電視臺標機設計For more information about electric motors, frequency changer or slip ring motors please call the company woelf
在生產商和服務商woelf出色的網頁上可以找到價廉物美的頻率變換器，電動機，集電環（繞線）型轉子電動機、繞線轉子異步電動機。In the first part of the paper, the development of motor control system fault diagnosis theory is summarized. on the basis of the analysis of the characteristics of wavelet, the theory is discussed and the definition of the singularity is given. because of the localization property of wavelet transform, wavelet analysis can be used to detect the characteristics of the singularity from the signal and intermittence fault problems lying in the motor under test
著重介紹了小波分析在電機控制系統故障診斷中的應用，根據小波理論在時域和頻域良好的局部化性質，討論了利用小波變換來檢測信號的奇異特徵的原理，給出了小波變換對信號奇異性特徵檢測的方法，針對實際應用，對小波基函數選取及小波分解尺度進行了探討。Pbx private branch exchange switching equipment for voiceband application
話音頻帶用的專用支線交換機6 type products whether one have whorl, card lock connection device of organization, it apply to post and telecommunications communication equipment, figure buy the line device extensively, the radio instrument waits until joining the coaxial cable of the radio frequency to use in the radio frequency return circuit, and can change each other with the products that iec60169 - 13 stipulate
型產品是一種具有螺紋、卡鎖機構的連接器，它廣泛應用於郵電通信設備、數字配線裝置，無線電儀器等射頻迴路中連接射頻同軸電纜用，並能與iec60169 - 13規定的產品相互換。2. machine will auto stop when the shute or weft opens, or weaving is done. it has higher output, quality than four shuttle circular looms. 3. controlled main equipment speed with frequency converter
主機變頻調速，改善起動性能，縮短定機時間，減少疵布率，節約電能和方便速度變換This paper researches and analyses the developments of web technology and magnetostrictive transducers from world wide region. the paper also analyes the characteristics curve of magnetostrictive transducers based on its equivalent circuit and researches the method how to make sure its syntony frequency and its electric simulation network parameters. at the same time, by using jsp technology, a magnetostrictive transducer electric simulation application is designed based on b / s three - tier system structure. the experiment data is fitted by curve fitting module. the equivalent input impedance of it with stimulate loop is separated based on the results of curve fitting and the syntony frequency and electric simulation network parameters of magnetostrictive transducers is determined by the input impedance. the method presented in this paper can determine the syntony frequency and electric simulation network parameters of magnetostrictive transducers with a better accuracy than the testing method of syntony & anti - synton y. further more, jsp, the advanced technology at current, has been used to realize a magnetostrictive transducer web electric simulation system. the system has good human computer interface and the function of resource sharing and information publishing. the research of this paper and its achievements have some practical merits in the researchful and applied fields of magnetostrictive transducer
用java編程語言編寫的曲線擬合模塊，對輸入的實驗數據進行了最小二乘法的曲線擬合；根據曲線擬合結果可從帶激勵線圈的磁致伸縮換能器的輸入阻抗中分離出磁致伸縮換能器鐵芯在無激勵電流時由機械振動形成的等效輸入阻抗，並由此輸入阻抗確定磁致伸縮換能器的諧振頻率及電氣模擬網路參數。本課題提出的方法與傳統的諧振?反諧振法相比，能更準確地確定磁致伸縮換能器的諧振頻率及其電氣網路參數。同時，採用當前比較先進的web技術，實現了基於jsp的磁致伸縮換能器web電氣模擬系統，該系統具有良好的人機界面和資源共享、信息發布功能。We developed the power system of electric drill based on dc - ac. the system use the technique of spwm frequency cowersation control. it changed th d. c provided by trolly wire of d. c motor into stable a. c adopted igbt and driving circuit adopted high speed module of exb840
針對當前我國煤礦電鉆電源的使用現狀，提出研製dc - ac變換的電鉆電源系統，該電源系統直接利用spwm變頻控制技術，將井下直流電機車的架空線所提供的直流電轉變成頻率是50hz的1 . 27v的穩定交流電。A novel bi - directional dc / dc converter was introduced in the dissertation, which based on refer much converter data. the soft switching, phase - shifted pwm and bi - directional dc / dc converter hang together, depress circuit switch ullage and noise effectively, which provide condition to increase switch frequency, efficiency and reduce size and weight for the converter ; at the same, the converter have the virtue of structure compact, voltage and current stress small etc such as ordinary hard switch converter
本文作者在查閱國內外大量雙向dc dc變換器資料的基礎上，採用一種新型雙向dc dc變換器的拓撲結構，把軟開關技術和移相控制pwm技術以及雙向dc dc變換器技術有機結合在一起，有效地降低了電路的開關損耗和開關噪聲，為變換器裝置提高開關頻率、效率以及降低尺寸及重量提供了良好的條件。Just change the channel on the television
直接在電視機上換頻道呢The design of excitation power source based on principle of three phase step motor and pulse width modulation ( pwm ) technology, intelligent power model ( ipm ) is used for inverter switches, the output ac pulse used as excitation signals. the speed of rotation and magnetic intensity can be changed by regulate the exciting converted frequency and magnitude of exciting current. constant current is achieved by closed loop feed back
勵磁電源結合步進電機原理與脈寬調制技術，選用智能功率模塊ipm作為逆變開關器件，輸出交流脈沖勵磁信號，以調節勵磁轉換頻率和勵磁電流大小為手段，實現對磁場旋轉頻率和磁場強度大小的有效調節，並通過閉環反饋實現閉環恆流控制。Ultrasonic plastic welding theory is generated by the generator 20khz or 15khz pressure, high - frequency signals, the system can be adopted for the high - frequency signals into mechanical vibrations, and in plastic products working, through working surface and internal friction among elements spread by the department of the interface temperature, when the temperature reached the melting point of her own, that the working interface rapid melting, and then fill in the gaps between the interfaces when shock stop working at a certain pressure and cooling will be a perfect welding
的高壓高頻信號通過換能系統，把信號轉換為高頻機械振動，加於塑料製品工件上，通過工件表面及內在分子間的磨擦而使傳處到介面的溫度升高，當溫度達到此工件本身的熔點時，使工作介面迅速溶化，繼而填充于介面間的空隙，當震動停止，工件同時在一定的壓力下冷卻定形成完美的焊接.點擊數： 723錄入時間： 2006 - 5 - 14It is possible that the computer is of low grade, and the time frequency is too low, please change for a new computer
有可能是主機檔次太低，時鐘頻率過低，請更換主機The main advantageous features of this project lie in the fact that it has resolved the problems of the lomw base stations, such as limited coverage areas, few channels, poor signal on high way and in high speed car, easily turn off and frequently switch etc. the processing response of 500mw base station instead of 10mw base - station, has effectively accounted for nearly all of the relative defects
本方案解決了西安pas網路由於開始採用10mw基站，所引起的單基站覆蓋范用小，通道少，特別在中、高速行駛的車輛上，手機容易產生切換頻繁、掉話率高等問題，同時在覆蓋范圍內盲區較多、信號質量較差，給用戶通話造成一定影響。The edge plays an edge to go to the school : if you do not reach the school directly, arrangement travels on the way or visit close friends, the airline of the choice, it is the person that with having flying boat you book the place that keep is first consideration, if international line cannot reach booked airport directly, also want arrangement to arrive at the person that the airline that there is collaboration inside territory can receive berth, just won ' t because change again and again plane, cause baggage to consign difficulty, or it is time of a favourable turn insufficient and the appearance that misses a flight
邊玩邊去學校：假如你不直接抵達學校，安排沿途旅行或拜訪親朋好友，選擇的航空公司，是以有飛航你預定停留的地點者為優先考慮，假如國際線無法直接到達預定的機場，也要安排到達國境內有合作的航空公司可接泊者，才不會因頻頻更換飛機，造成行李托運困難，或是轉機時間不夠而錯過班機的現象。分享友人