儀器變量法 的英文怎麼說

中文拼音 [yíqìbiànliángfǎ]
儀器變量法 英文
instrumental variable method
  • 儀 : 名詞1 （人的外表） appearance; bearing 2 （禮節; 儀式） ceremony; rite 3 （禮物）present; gift 4 ...
  • 器 : 名詞1. （器具） implement; utensil; ware 2. （器官） organ 3. （度量; 才能） capacity; talent 4. （姓氏） a surname
  • 量 : 量動1. （度量） measure 2. （估量） estimate; size up
  • 法 : Ⅰ名詞1 （由國家制定或認可的行為規則的總稱） law 2 （方法; 方式） way; method; mode; means 3 （標...
  1. And understanding and studying the spectral features and variation rules of geo - targets in the experimental area, raising that it is the basis of geo - targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo - targets, realizing that in a great extent spectral - integrated - form - based classification method can remove the phenomenon of " different spectrum with same objects " resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo - target with similar spectral forms and much different values of whole reflection ratio. it is suggested that " red edge " range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel - based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. the remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed

    研究結果如下：首先針對荒漠化地區的地物特徵，對高光譜數據不同波段的數據質量、波段組合進行了評價，提出了適用於荒漠化監測的基本波段選擇集；初步了解和掌握了研究地區的地物光譜特性及變異規律，進一步明確了掌握地物光譜特徵和變異規律是用成像光譜儀數據提取地物信息的基礎；發現了基於光譜整體形狀的分類方法在很大程度上能夠消除由於傳感器、地物目標觀測方向之間的角度變化引起的反射率曲線整體平移的「同物異譜」現象，對于譜形相似而整體反射率的值相差較大的兩類地物，通過引入均值和方差圖像參與分類得到解決；研究還表明在植被「紅邊」范圍內的波段是進行荒漠化監測的主要特徵波段，這些波段與植被生物量和蓋度都有密切的關系，是開展精細植被分類研究和植被定量反演的重要基礎；像元的導數光譜分析可以消除土壤背景的影響，是進行植被生物量和蓋度定量反演的有力工具；建立了荒漠化監測主要評價因子的定量反演模型，並分析了模型的適用性。
  2. Thirdly, in the environment of labview, several kinds of vis used for sensor signal test are designed, including wave generation, time domain measurement, filter disposal, frequency analysis, etc. after that, wavelet analysis in the application of one - dimensional signal de - noise is studied, threshold and translation invariance wavelet de - noise are realized, and wavelet de - noise vi for zero drift signal of the fiber optic gyro in fcs is designed using labview

    接著，在labview環境下開發了多種用於傳感器信號測試的虛擬儀器，具有波形發生、時域測量、濾波處理、頻譜分析等多種功能。隨后，研究了小波分析在一維信號消噪中的應用，實現了labview環境下的閾值法和平移不變量法小波消噪，並利用labview設計了飛控系統中光纖陀螺零漂信號的小波消噪儀。
  3. The dynamic data of displacement, strain and impetus force acquired from the experimental collection system are also well analyzed for measuring precision and errors. based on the underlying work and experimental features, the thesis proposes a simple, practical and well accurate impetus resultant force fitting method, weighted factor fitting method. a line - off data processing software system for bird - impact experiment, named as cadabie, is well designed under the principle of software engineering, and has been applied, with high praise, in bird - impact laboratory in the factory numbered 320 and esfahan bird - impact laboratory of iran

    本文系統總結了鳥撞實驗的全部過程、主要儀器設備的工作原理與性能參數，分析了鳥撞實驗動態數據採集系統中位移、應變與撞擊壓力傳感器測量系統的測量范圍、測量精度及其工作特點，提出了一種更適合鳥撞實驗的撞擊合力計算擬合方法：加權因子法，同時應用軟體工程原理編制了「鳥撞實驗計算西北工業大學博士論文機數據分析系統」 （ caoabie ） ，目前該軟體己經在320廠鳥撞實驗室以及
  4. The advantages of the new method of calculating the vtec including : ( 1 ) because the instrumental bias is considered, the vtec ' s change going with time is closer to their real change. ( 2 ) with the precision of calculated the vtec improved, the vtec can reflect the increase of the vtec resulted from the solar flare

    新的求解vtec的方法具有以下優點：考慮了gps衛星和接收機的儀器偏差的影響，計算的電子總量隨時間的變化更接近電離層的實際情況；提高了求解電子總量的精度，計算出的vtec值更能反映耀斑引起的電子總量的增加情況。
  5. For solving this problem, there are several ways of measuring the pts of the swr at present, such as demarcating path length, strain and stress, magnetic induction measurement and ultrasonic measurement. however, portable, universal and effective instruments or methods don ’ t appear up to now in china

    為了解決這個問題，目前已經有了多種檢測鋼軌溫度應力的方法，比如為標定軌長法、應變法、磁感應測量法和超聲波測量法，但是在我國，便攜、通用有效的檢測儀器或方法還沒有被研製出來。
  6. The measurement of oil / water two - phase flow is primarily accomplished by the combination of total flow rate and holdup measurement, and at present, the rotator flowmeter is used to measure the total flow rate. since the rotator flowmeter has movable parts, which makes its responsibility behave nonlinearly under poor environment of me under hole whose fluids have very complex and changeful characteristics and affects the measurement precision. what ' s more, the widely used centralized measurement instrumentation meets problems in oil wells characterized with high production or high water cuts

    通常油水兩相流測量主要是通過總流量和持率的測量組合來完成的，目前在總流量的測量中主要使用的是渦輪流量計，由於渦輪流量計具有可動部件使其在流體特性復雜多變的惡劣井條件下的響應呈非線性變化規律，影響測量精度，此外，普遍採用的集流型測試儀器在高產井及含水率高的油井中使用也遇到困難，為此，一種新型的適合非集流型點測的測試方法和測試儀器亟待發展和推廣。
  7. The test instruments based on this method are highly precise, but costly. the author develops a grounding measurement system of substations based on the virtual instruments, which uses labview as the development software and adopts the small electric current method. the fft method is used to process the measurement data, which can decrease the measurement error

    本文作者研製了基於虛擬儀器的變電站接地網接地測量系統，該系統以labview為軟體開發平臺，採用小電流測試法，並利用快速傅立葉變換方法對測試信號進行數字濾波處理，提高了該系統的信噪比。
  8. 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。
  9. In the first part of this thesis, the effect of nir instrument ' s energy level on the model predictive power was studied with maize sample

    本文第一部分以玉米粉末樣品，用漫反射法測定玉米粗蛋白含量，研究了近紅外儀器能量變化對分析模型預測效果的影響。
  10. Based on the theory that the optical properties of zncdse / znse qd structure at different formation and ripening stage are different from each other, by investigating the variation in emission peak energy and integrated intensity, the formation and ripening information of the dots was obtained, which overcomes the disadvantage of atomic force microscopy ( afm ) in that it can not be applied to the measurement of the initial formation stage of the qd. furthermore, it is of great help to clarify the controversies in the ripening process of se - compound qd

    利用量子點在不同形成和熟化階段具有不同的光學性質這一思想，通過測量zncdse znse量子結構的發光峰的位置與相對強度的變化，獲得了量子點的形成和熟化信息，從而既解決了一般金屬有機物化學氣相沉積（ mocvd ）設備由於沒有原位監測儀器而無法對量子點的形成過程進行監測的不足，又澄清了原子力顯微鏡表徵的量子點熟化過程的爭議。
  11. The research focus on soil c compaction principle under the action of combination impaction and vibration by the test and theory method based on elasticity, plasticity and rheology performance. put a lot of stress boxes in the soil. measure and record the soil stress directly, then process the record datas by mathematic method

    在方法上採用了理論與試驗相結合的研究方法，在土體彈、塑特性及土體流變特性的理論基礎之上，在土體中埋放了大量的壓力盒，通過測量和觀測儀器直接記錄土體內部各點在沖擊與振動聯合作用下的內應力值。
  12. The paper has made detailed observation by the existing apparatus and the field observation stations. based on the image and the vector database of the yutian oasis, the study has obtained the precise coordinates of investigation points by gps technique, and overlapped them with the images. after classifying the images with the maximum likelihood supervised classification method, we import the result into cis software, and analyze the yutian oasis changes about land cover " s quantity, quality and spatial position from 1976 to 2001

    本文利用現有儀器設備和野外觀測網站進行詳細觀測，在建立於田綠洲圖像庫和矢量數據庫的基礎上，運用gps技術取得野外考察樣點的精確坐標並與研究區各時期影像疊加，對影像進行了最大似然法監督分類，並將分類結果轉入gis軟體處理，全面分析了1976年至2001年該綠洲的土地覆蓋類型數量、質量與空間上的變化。
  13. By means of wide investigation, instruments development, a series of model experiments and relative theory analysis, following results are obtained in river model time scale distortion ratio, model roughening, inflow and outflow controlling methods and equipment, new water level and velocity measuring technique, model automatic measuring and controlling system : ( 1 ) with the aid of configuration software, a large scale river model automatic measuring and controlling system is developed, realizing river model automatically controlling and basic hydraulic parameters automatically measuring

    本文通過廣泛調研、儀器研製、系列模型試驗和相關的理論分析，在河工模型時間變態率控制、模型加糙、出入流檢測方法和設備、水位流速測量新技術、模型自動測控系統等方面取得了下列成果： （ 1 ）應用工控組態軟體技術，開發了一套大型河工模型自動測控系統，實現了模型內外邊界的自動控制和基本水力參數的自動量測。
  14. It emphases the selection of secondary voltage of the step - down transformer, the control and protection of thyristor, the calculation of compensation capability and group capability, the technique of cross - zero switched on / off capacitors or reactor, the solution of avoiding possible resonance in switching on / off groups of capacitors or reactor and the measure of the best time to switch ( including the design of the computer survey and control system, instrument deliver system, delay operate and protect system ). although thyristor as a no - contact switch can avoid almost the problem of contact switch with contact, it can not solve the over - voltage, over - current and transient process itself as switching on / off capacitors or reactor. so we must develop a set of thyristor - switched control and protect system with great reliability so that it can realize of cross - zero switching on / off capacitors or reactor at any time

    晶閘管具有過零、動作快速的特點，本研究以晶閘管為電容器和電抗器的分組投切開關，重點研究了協調變壓器二次電壓的選擇、晶閘管觸發控制及保護、動態補償容量及分組容量的計算確定、過零投切電容器和電抗器技術的實現、以及分組投切電容器和電抗器可能發生諧振的處理計算方法，給出實現最佳補償投切選擇方法（測控系統、儀表變送系統、操作和保護系統的設計步驟） ，研製了一套高可靠性晶閘管觸發控制及保護系統，實現對無功的靜止可調補償。
  15. As one of the most important instrument for soil test, triaxial apparatus has been playing an essential role in the development of soil mechanics. however, there are many limitations and shortages in specimen deformation measurement in triaxial test. with application of digital image processing technique, some of these limitations and shortages can be overcome and lead to a new, more reasonable and more effective method in specimen deformation measurement

    土工三軸儀作為最重要的土工試驗儀器之一，對土力學的發展起到了十分重要的作用，然而三軸試驗現行的變形測量方法存在諸多缺陷和不足，把計算機數字圖像測量技術應用於土工三軸試驗，可以克服這些缺陷和不足，為土工三軸試驗提供一種新的、更為合理有效的變形測量手段。
  16. With the rapid development and application in electronic measurement technology and instruments of micro - electronics technology, computer technology, software technology and network technology, new measurement theory, new measurement method, new measurement fields and new instrument architecture continually come forth and the function and effect of electronic instruments have given birth to quality change and resulted in the conception of instrument broken in many aspects

    隨著微電子技術、計算機技術、軟體技術、網路技術的高度發展及其在電子測量技術與儀器上的應用，新的測量理論、新的測試方法、新的測試領域以及新的儀器結構不斷的出現，在許多方面已經沖破儀器的概念，電子測量儀器的功能和作用發生了質的變化。
  17. This thesis analyses the present situation of energy metering in bishan network and some network at home, main factors which lead to inaccuracy of energy metering are dissected and the severity degree are pointed out. the method of enhancing accuracy of metering using modern technique are put forward which including : 1 ) modernization of meter, replacing the induction watthour meter with full electronic watthour meter ; 2 ) put real time change of mutual inductor ratio of transformation into consideration, method on real - time computation are presented. 3 ) using full electronic watthour meter to measure fundamental power and harmonic power separately and discussing idea of billing on harmonic

    這些方法包括： 1 ）計量儀表的現代改造，用全電子式電能表代換感應式電能表； 2 ）計及互感器變比的實時變化，對互感器的變比進行實時模擬計算，並提出了實時計算的方法； 3 ）用全電子式電能表對基波電能與諧波電能分別計量，並討論了對諧波電能計費的觀點。
  18. In order to get suitable algorithms which are accuracy, feasible, practical and convenient to be realized by virtual instrument, this paper firstly analyzes measuring algorithms of major power quality parameters, such as voltage, current, frequency, harmonics, flicker, unbalance factor etc. then two algorithms, the one for basic power quality parameters measurement based on spectrum correction and the other one for flicker measurement based on fft, are presented

    基於虛擬儀器技術的電能質量測試儀應用靈活，升級方便， 「軟體就是儀器」的特色使測試儀各種通用功能和預期功能的方便實現成為可能。文章對電能質量的一些主要指標:電壓、電流、頻率、諧波、電壓波動和閃變、三相電壓不平衡度等的測量演算法進行了分析，尋求適合虛擬儀器實現的，切實可行、計算精確、實用性強的計算方法。
  19. The interferometric strain gage offers a method for measuring strain without actual use of a gage.

    干涉應變計提供了一種實際上不用儀器測量應變的方法。
  20. Method for measuring partial discharges in instrument transformers

    儀表變壓器部分放電測量方法
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