conversion precision 中文意思是什麼

conversion precision 解釋
換算精度
  • conversion : n 1 變換,轉化,轉換;換算,換位。2 (意見、信仰等的)改變〈特指改信基督教〉;(車身,設備等的)...
  • precision : n 精密,精確性;嚴格;精密度;【修辭學】精確。 arms of precision 裝有瞄準儀的槍炮。adj 精確的,精...
  1. The synchro / resolver signal transmit & receive card is the most important and difficult part which used special a / d and d / a ( axis angle converter ) to make conversion between the analog singnals related to angle and its digital counterpart, thus solve the issue of stimulation and test of synchro / resolver signal , improved the test precision and automatic degree

    其中同步器卡的開發是難點和重點,它採用特殊的數/模、模/數轉換器件?軸角轉換器,實現了角位-數字信號相互間的直接轉換,解決了隨動系統性能檢測中三相同步器信號激勵與同步器信號/分解器信號數字化檢測問題,有效提高了系統的自動化程度和檢測精度。
  2. The delay chip, whose delay precision can be 10ps, wide band sample - hold amplifier ( sha ), and high speed and precise analog / digital conversion ( adc ) are used in the system

    能夠對5mhz以下的信號進行隨機采樣、波形顯示、頻譜分析,還能夠對採集的波形數據進行存儲、共享。
  3. Aiming at the existence of coal dust and gas in the coalmine environment and the special requirements of mine case explosion - proof surface process, the error conversion model, shape precision characteristics, transfer drawings, descriptive equation and error transfer structure chart in the production technological process of case accessories adopting the information flowchart of control theory are discussed, which simplify the traditional block diagram of technological process and represent the relationship of working procedure ( variable ) by information flowchart instead of miscellaneous block diagram

    針對煤礦井下煤塵和瓦斯存在的環境特性、煤礦井用箱體防爆面加工的特殊要求,採用控制理論的信息流圖,對工藝過程中傳統方塊圖進行簡化,使繁雜的方塊圖解採用信息流圖表示工藝過程的工序(變量)之間關系。
  4. The hardware has two input channels of high - speed analog signal, with the signal amplitude of 0 - 5v, the conversion precision of 12bits, and the maximum sampling rate of 400ksps. this system includes 4 dsps ( adsp 2181 ), which can be arranged as a pipe line processing array. many algorithms can be realized in this system

    系統硬體有兩路模擬數據採集通道,模擬信號輸入范圍為0 ? 5v ,轉換精度為12位,最高采樣率400ksps ;系統包含4片dsp ( adsp2181 )構成的流水線型的處理陣列,可用於實現各種演算法;系統的控制邏輯由fpga完成。
  5. Conversion failures such as loss of precision and an attempt to convert a nonnumeric string to a number

    轉換失敗,如丟失精度和嘗試將非數值字元串轉換為數值。
  6. According to the request of this subject, we have developed the system hardware and software for the slave device and the inspection software running on the pc. in this paper all of the followings is illustrated detailedly, such as the research on the principles of measurement and its realization, three means of water - level measurement that are separately based on photo electricity coder, pressure sensor and potentiometer ; selection of the microchip, we choose an advanced integrated soc ( system on chip ) microchip c8051f021 as the main controller ; realization of signal sampling, processing and its conversion in the mcu ; application of high precision 16 bits adc cmos chip - - ad7705 in our system, designing its interface with the microchip and relevant program ; using a trickle charge timekeeping chip ds1302 in the system which can provide time norm and designing of its i / o interface and program ; additionally, a 4 ~ 20ma current output channel to provide system check - up using ad421. in the system, ad421, ad7705 and the microchip compose spi bus ; to communicate with the master pc, here we use two ways which are separately rs232 and rs485 ; moreover, there are alarm unit, keyboard unit, power supply inspection unit and voltage norm providing unit in the system

    針對研製任務的要求,課題期間研製了下位機系統硬體和軟體,開發了上位機監控軟體,其中所作的具體工作包括:測量原理的研究和在系統中的實現,在本次設計中用三種方法來進行水位測量,分別是旋轉編碼器法、液位壓力傳感器法和可變電阻器法;主控晶元的選擇,我們選用了高集成度的混合信號系統級晶元c8051f021 ;實現了信號的採集和處理,包括信號的轉換和在單片機內的運算;高集成度16位模數轉換晶元ad7705在系統中的應用,我們完成了它與單片機的介面設計及程序編制任務;精確時鐘晶元ds1302在系統中的應用,在此,我們實現了用單片機的i o口與ds1302的連接和在軟體中對時序的模擬,該晶元的應用給整臺儀器提供了時間基準,方便了儀器的使用;另外,針對研製任務的要求,還給系統加上了一路4 20ma模擬信號電流環的輸出電路來提供系統監測,該部分的實現是通過採用ad421晶元來完成的,本設計中完成了ad421與單片機的spi介面任務,協調了它與ad7705晶元和單片機共同構成的spi總線系統的關系,並完成了程序設計;與上位機的通信介面設計,該部分通過兩種方法實現: rs232通信方式和rs485通信方式;系統設計方面還包括報警電路設計、操作鍵盤設計、電源監控電路設計、電壓基準電路的設計。
  7. This paper first researched the general situation of domestic and abroad developments in the field of ultra - precision aspheric surface machining technology and its numerical control system, analyzed the aspheric surface machining principle of ultra - precision machine, and in these bases, founded the kinematics model of ultra - precision machine in ideal condition using the homogeneous coordinate conversion method in robotics

    分析了本實驗室超精密機床非球面加工原理,在此基礎上應用機器人學中齊次坐標變換的方法建立了理想情況下超精密機床運動學模型,通過綜合分析超精密機床的運動誤差,給出了超精密機床的誤差補償模型。
  8. 2 the design and manufacture of focs instrument system the foundation of commercial fiber optical chemical technique is to manufacture a fiber optical chemical instrument system. an instrument is assembled with xenon light as the source, bifurcate quartz fiber as the carrier for light, high precision photomultiplier tube for the conversion of light signal to electron signal and the 16 - digit multi - channels analog - to - digital card for collection of data

    生產人作者選擇氖燈為光源、設計聚焦系統,以石英分支光纖作為傳輸光信號介質,高精度光電倍增管檢測, 16位多道數據採集卡為a d轉換,採用visualbasic編寫windows平臺操作軟體,菜單提示,窗口人機對話,研製成功單通道光纖化學過程傳感儀器系統。
  9. In order to realize the conversion and unification of the data in different datum frames, converting parameters through robust estimation is put forward when the precision index of the two different coordinates cannot be obtained

    針對在無法獲知兩個坐標系下公共點成果精度指標的情況下,提出了利用穩健估計理論合理求解轉換參數的一種方法。
  10. 2. to implement the conversion of signal, a multi - channel time / data convert module with high precision and programmable time resolution is used. its characters and usages, including the theory and the software configuration program by using the chip sn74 | act8990, are introduced in the dissertation

    2 .為完成信號的轉換,儀器選用了一個多通道,高精度、具有可編程時間分辨能力的時間/數字變換模塊( tdc ) ,論文介紹該模塊的特點,以及在課題中的使用方法,包括實現其軟體配置的晶元sn74act8990的原理和編程方法。
  11. In the seventh part, the conversion between the data of spss and gis and the data editing function of spss were introduced. and simulations of the space distributions of the ground subsidence and its influence factors were performed by spss. the lowest precision of the simulation is 86

    第七部分,介紹spss與gis的數據之間的轉換、 spss的數據編輯功能,運用spss對地面沉降及其影響因素的空間分佈進行了模擬,模擬的精度最低86 . 7 ,最高為97 . 6 ,與各要素實際的空間分佈趨勢吻合很好。
  12. Advanced fpga technology is introduced to improve the integration of digital circuits, and all digital circuits in the original module are integrated in the fpga chips, which could not only reduce the cost, but also improve the reliability and measurement precision of the circuits. high speed digital signal processor ( dsp ) is selected as the coprocessor instead of scm ; it can receive all kinds of commands sent from vxi, analyze and execute the commands, harmonize each section of the module and process the data. higher - conversion - speed comparator chip is adopted to convert the input signals being measured into square waveform signals which could be identified by fpga chip ; it can expand the measurement range of frequency dramatically

    本文在原有vxi總線四通道計數器模塊的設計基礎上,通過對原模塊缺陷的分析,採用一些新的技術和新的電子器件來重新設計該計數器模塊:採用最新的fpga技術來提高數字電路的集成度,將原模塊中的所有數字電路全部集成在fpga晶元中,這樣不僅能節約成本,還能提高電路的可靠性和測量精度;採用高速的數字信號處理器( dsp )取代原有的單片機作為協處理器,來接收vxi發來的各種命令,分析命令、執行命令、協調模塊各部分的工作以及對數據的處理;採用轉換速率更高的比較器晶元將輸入的被測信號轉換為fpga晶元能夠識別的方波信號,能極大提高測量頻率的范圍;採用d / a轉換晶元和隔離運算放大器得到隔離通道所需的比較電平,該比較電平值能夠根據實際需求進行設置,能增強模塊的使用靈活性。
  13. Abstract : the possible problems and solving methods for the a / d conversion device built inside the micro - processor in application to precision measurement are proposed and analysed. it is useful for the inside integrated resources of micro - processor to been rationally applied, been fully developed, been improved and been enhanced

    文摘:較系統地分析和研究了微處理器內嵌式a / d轉換器在精密測量儀器應用中可能遇到的問題及解決方法,希望在合理利用、充分開發以及改善和增強微處理器內部集成資源方面具有一定參考價值。
  14. Secondly, according to the adsorption feature of gas on solid under high pressure, the relation between apparent capacity and absolute capacity is explained from different points. the defect of the conversion method used currently for apparent capacity and absolute capacity is pointed out. furthermore, the two new methods of determining absolute capacity are proposed for improving the test precision

    針對高壓氣體吸附的特點,從不同角度闡明了視吸附量和絕對吸附量的關系,指出目前國內外應用的視吸附量和絕對吸附量相互換算方法存在的缺陷,並提出了獲得絕對吸附量的兩種新方法,可提高測試絕對吸附量的精度。
  15. ( 2 ) model correction and comparison in the process of conversion from zenith day delay to gps water vapor and precision evaluation. saastamoinen ( sa ) model and hopfield ( h ) for dry delay and bevis model for atmospheric weighted temperature are adopted

    ( 2 )模型訂正與比較在gps水汽反演過程中,一般干延遲和大氣加權平均溫度的計算是採用「普適性」模型,目前應用較多的有saastamoinen ( sa )模型、 hopfield ( h )模型和bevis模型。
  16. It compared some of linearization methods of platinum resistance ' s characteristic. it introduces a new subsection linearization method : unequal distance arithmetic, it improves the measure precision and decrease the calculation load. in the voltage and electrical current measure section, it use a measure chip which includes a / d conversion, dsp and arithmetic procedure, so it improves the mearsure precision greatly

    在前端的檢測部分,分別對溫度檢測及電壓電流采樣進行了研究,在溫度檢測中對常用的幾種鉑電阻的特性的線性化方法進行了比較,提出了一種新型的分段線性化方法:非等距演算法,既提高了精度又減少了計算量,具有新意;在電壓電流測量中,採用了一種內置a / d轉換、 dsp 、演算法程序等的測量晶元,大大提高了測量精度。
  17. Change of temperature will affect the data acquisition precision of a / d conversion circuit. in this paper, the principle of adc and the effect of the factors of a / d conversion circuit are analyzed, and the relation model of a / d conversion circuit temperature and accelerometer output is established. after compensating the temperature error by using the temperature model, the data acquisition precision of the accelerometer has been improved observably. thirdly, in the temperature control turntable, we perform the static temperature experiment of orthogonal accelerometers

    文中分析了a / d轉換器的工作原理,以及影響a / d轉換電路輸出精度的各種因素,並通過多項式擬合的方法找到了加速度計靜態輸出隨a / d轉換電路溫度變化的規律。利用該規律對a / d轉換電路的溫漂進行補償,補償后加速度計的輸出滿足了測量精度的要求。
  18. The explicit numeric conversion may cause loss of precision or result in throwing exceptions

    顯式數值轉換可能導致精度損失或引發異常。
  19. Precision is always truncated never rounded and overflow throws an unsupported conversion error. for example, using

    總是直接截取有效位數(從不四捨五入) ,而溢出將引發不支持轉換的錯誤。
  20. This hardware can complete 120 million times float operation in one second. the rate of a / d conversion is up to 500ksps and the precision is up to 16 bits

    該硬體可以實現每秒120兆次浮點運算,採用一片ltc1608進行a d轉換,片內自帶采樣保持器、解析度為16位、轉換率為500ksps 。
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