頻率測深 的英文怎麼說
中文拼音 [bīnlǜcèshēn]
頻率測深
英文
frequency sounding-
Fourthly, according with the analyzing of flow measurement, we research the main problems needed to be solve in the process of measurement, such as analysis and measurement of the internal resistance, selection of excitation frequency, stable signal datum mark and restraining common mode interference, restraining for serial mode interference and working frequency interference ; transporting and shielding the flow signal, constant current excitation and magnetic field equalizing, flow measuring
第四，根據對流量測量問題分析的，深入研究了設計過程中需要解決的主要問題。如內阻分析與測量;勵磁頻率的選擇;穩定信號基準點與抑制共模干擾;串模干擾與工頻干擾抑制;流量信號傳輸與屏蔽;恆流勵磁與磁場補償;流量測量點的選擇等。Delta brain waves are those with the lowest frequencies and relate to the unconscious mind. delta waves are present during deep sleep, even when the other types of brain waves are not detectable, but they may also be present in the waking state, combined with the other types. they are associated with highly instinctive, intuitive, and empathetic states of mind
波頻率最低，它構成了無意識，波出現于其它類型的腦波測不到的深睡眠期，也出現于與其它類型的腦波相混合的清醒狀態它與高度本能直覺和同一體等心靈狀態相關。Based on that penetration depth of eddy current is theoretically different for different operationalfrequency, the flaw depth quantitive measurement method based on the characteristicalfrequency was expounded. to find the best testing model and position, it analysed and discussedthe factors which effected measurement. the mathematic relationship between the specialfrequencyand flaw depth was established to realize the accureate measurement of flaw depth. it primarily researched the technology of alternating current magnetic field leakage testing ( ac - mfl ) in our country
在利用頻率掃描技術的基礎上，提出了基於拐點頻率的渦流檢測缺陷深度測量方法，對影響測量的多種因素進行了分析和實驗研究，得到了最佳的測試位置和測試方法，建立了拐點頻率和缺陷深度的定量關系，為深度的測量提供了新的途徑。They not only have the quality of slow decay, but also narrow beam and focused energy, which are widely used in military and communication
慢衰減電磁波的衰減比一般電磁波慢，可以實現較大的探測深度；由於它的頻率高，可以實現較高的解析度。Malfunctions can be diagnosed using infrared thermography without affecting the work state of tested equipments, thus the diagnostic accuracy can be improved. infrared thermography, just as often, improves electronic fault diagnosis by isolating the malfunction to specific areas of the circuit board, what is more, it usually does point directly to the failing component. thermography even can rapidly diagnose up to hundreds of elements on one pcb at one time, without requiring the operator to know the circuit principle very well, which can reduce the workload greatly
紅外故障檢測儀可以對電子設備進行在線測量，檢測時不會影響待測設備的正常工作和頻率特性，這對高頻電路的檢測尤其方便，且能提高診斷的準確性;他通常能指出電路板上的故障區域，甚至經常能直接找出故障元器件，這樣就提高了維修質量;並且能在不需要檢測人員對電路原理有深入理解和分析的情況下，對同一塊電路板上的數十隻甚至數百隻器件同時進行快速診斷，這就大大減少了維修人員的工作量，提高了維修人員的工作效率。Supported by heilongjiang province natural science foundation projects " research on the errors mechanism of time division a. c. power measurement " ( no. e9719 ), " research on theory of analog digital mixed sampling power energy measurement " ( no. e01 - 15 ) and foundation for university key teacher by the ministry of education " the research on the low audio frequency a. c. power measurement smart instrument " ( no. 1087 ), in this dissertation it is made that a systematic and deep study on power measurement model errors and instrument errors about analog sampling, digital sampling and mixed sampling measurement, and fully experiments about mixed sampling measurement
本學位論文在黑龍江省自然科學基金資助項目「時分割交流功率測量原理誤差產生機理的理論研究」 （編號： e9719 ） ， 「模擬數字混合採樣功率與電能測量的理論研究」 （編號： e01 - 15 ）和教育部高等學校骨幹教師資助計劃項目「中頻電功率測量智能儀器的研製」 （編號: 1087 ）的資助下，以電功率模擬采樣測量、數字采樣測量和混合採樣測量方法為對象，對電功率測量的原理誤差和儀器誤差進行了系統和深入的理論研究和有關的實驗研究。This paper ' s study is focused on the principle of bistatic sar on the basis of giving a brief introduction of sar principle, including azimuth resolution, mapping width, focusing deepness, pulse repetition frequency limitation and radar equation etc. then the paper studies the special form of bistatic sar with stationary transmitter
在簡要介紹了合成孔徑雷達的成像原理后，本文著重從原理方面對雙站sar進行了分析，討論雙站sar的方位向解析度，測繪帶寬，聚焦深度，脈沖重復頻率限制，雷達方程等問題，然後對發射機固定的雙站sar這種特殊的雙站sar模式進行分析。Although the tread irregularities depth computing result error is a little big due to the sampling frequency is too low. we believe that the tread irregularities depth computing result will improve with enhancing the frequency of the sampling
擦傷精度雖由於采樣頻率太低的原因而誤差稍大，但趨勢明顯，相信只要提高頻率，擦傷深度的測量精度會改善。This thesis probes into design of microcomputer system taking single chip microcomputer as central, anti - interference, security segregate and design of interface circuit etc. furthermore, the option to cycle of sampling various frequencies examine signals is also analyzed and it was utilized in the examine system. thus, the dependability and stability problem of the microcomputer examine system of hydraulic resistance testbed have been solved better, make this test a modern techniques and practibility is good
本文在以單片機為核心的微機系統的設計、介面電路設計、抗干擾技術及安全隔離技術等方面進行了較深入的研究，分析了不同頻率檢測信號采樣周期的選擇，並在檢測系統中得到了應用，較好地解決了水阻試驗臺微機檢測系統的可靠性和穩定性問題，使得該試驗臺技術先進、實用性好。Taking dc motor test as an example, a creative idea of applications of some advanced signal processing tools, such as time - frequency analysis, wavelet, and instantaneous frequency ( if ) evaluation, in motor testing field is presented. the paper systematically summarizes basic theories of time - frequency analysis and wavelet transform based on which an in - depth research of effective if evaluation based on wavelet ridge and wavelet curve is carried out. in the end a fast t - n characteristic testing system with neither torque nor speed sensor is successfully developed
本論文主要關注小波分析在電機性能自動測試系統中的應用，針對傳統電機測試系統以及信號處理技術在電機測試領域中應用的不足，以直流電機為例，提出了將時頻分析、小波包變換以及基於小波脊的瞬時頻率提取方法應用到電機測試領域的新思路；較系統地總結了時頻分析和小波變換的基本理論，深入探討了基於小波脊線和小波曲線的瞬時頻率提取，並成功開發了基於正交小波包分析和基於小波脊線的瞬時頻率提取的無轉矩轉速傳感器的直流電機快速測試系統。Moreover, a method for iterating thermal and magnetic analysis is put forward. in chapter 5, the distributed characteristics of eddy and temperature fields in induction heating process are simulation by fem respectively, including the distributions of eddy and temperature fields during the whole induction heating process, the influence of frequency and magnetic disperse, and the prediction of hardened depth
第五章:用ansys軟體對感應加熱過程中工件內渦流場、溫度場的一些基本問題進行模擬及分析，主要包括:加熱過程中工件渦流功率密度及溫度分佈規律;頻率與磁力線逸散對加熱效果的影響;同時對感應淬火淬硬層深度進行了模擬預測。A more in - depth discussion of commercially available time and frequency measurement equipment and standards, and how such instrumentation can be used in the metrology laboratory
市場上可用的時間頻率測量設備和標準的更深入的討論，以及此類儀器如何應用在計量實驗室。Through analysis on skin depth and calculation of the responses of a theoretical model, the mt response curves for 40 number and 80 number frequencies are obtained
通過對趨膚深度分析以及對理論模型響應的計算，得到了80個頻率點與40個頻率點的大地電磁測深響應曲線。Base on review of existed study and application in suppressing cable vibration in the world, technique of mitigating cable vibration with viscous damper and mr damper has been investigated in this dissertation, and the main contents and progresses in form of summary are as following : 1 the motion differential equations of the cable - damper system are formatted, which take into account these factors, such as the inclined angle, sag, stiffness etc. coupling motion between cable and deck is studied with analytical and numerical method. numerical results show that large amplitude vibration of cable with beat rhythm will occur when exciting frequency of deck equals two times modal frequency of cable
本文在對國內外斜拉索振動控制研究與應用現狀進行綜合評述、分析的基礎上，針對上述問題進行了深入研究，具體的研究內容和取得的成果包括： 1 、建立了斜拉索-阻尼器系統運動方程，對拉索與橋面的耦合振動作了分析和研究，數值結果顯示當橋面激振頻率等於某階拉索模態頻率的兩倍時，很小的初始擾動將引起拉索的大幅振動，並呈現拍振的特徵，與實測的拍振信號一致。Based on the theory of mfl and a study on the signal characteristics ofac - mfl and ect : on one hand, it expouded the flaw identification model of “ slope ratio ” todetect the defects in panel, rob or pipeline ; on the other hand, the flaw - depth measurementmethod based on the characteristical frequency were used in ac - mfl. the application ofac - mfl was realized, and it showed the accordance of defect detection for these twotechniques
從其檢測原理出發，在與上述渦流檢測信號特點進行比較的基礎上，一方面，利用「斜率比值」識別模型實現了對板材、管材、棒材等表面缺陷的檢測;另一方面，利用交流信號的信息實現了基於拐點頻率的深度測量方法在該技術中的應用。The results of calculation prove : the new structured coaxial probe is superior to the traditional coaxial probe in both sensitivity and penetrating depth when used to measure the dielectric properties of chemical reactants or layered biological tissues, and the relationship between the measurement sensitivity of this new structured probe and the frequency of electromagnetic wave are obtained, which provides the optimal frequency for the actual application
計算結果表明：在化學反應溶液及生物分層組織介電特性參數的測量中，這種新型的同軸探頭在測量靈敏度及透入深度兩方面都優于傳統的平口同軸探頭。通過計算模擬還得出了這種新型同軸線探頭的測量靈敏度與電磁波頻率的關系，為進一步研究其最佳測試頻率提供了有價值的參考依據。Exemplified by the application of controlled source audio - frequency magnetotelluric sounding, this paper discusses the deep and periphery prospecting work with the resistivity sounding technique in the bajiazi lead and zinc mine of liaoning province
摘要以可控源音頻大地電磁測深方法應用為例，討論遼寧省八家子鉛鋅礦深部及外圍電阻率測深找礦問題。Accuracy of frequency estimation is the kernel of doppler log performance. bandpass sampling fft method, which is suitable for deep water doppler log, is present. accuracy of this method is desirable according to simulation results
在參考借鑒大量頻率測量方法的基礎上，提出了適用於大深度多普勒計程儀的頻率估計演算法-帶通采樣fft法，並進行了模擬計算，其精度令人滿意。Acoustic frequency sounding
聲波頻率測深Frequency sounding instrument
頻率測深儀分享友人