阻值范圍 的英文怎麼說
中文拼音 [zǔzhífànwéi]
阻值范圍
英文
rated rcsistance range-
Fist ly, use mass equivalent method to predigest the original rotor system. secondly, use transfer matrix arithmetic to have finished the relative program to calculate the critical speed of flexible multi - tray rotor bearing system by matlab language. thirdly. finish program the unbalance response using riccati - transfer matrix arithmetic and finity buck arithmetic. fourthly, answer to the high vibration of uncontroled system when cross the critical speed, come out to adopt changing clearance damper bearing to control the viberation
本文對多柔盤轉子-支承系統的振動現象做了以下初步探索：用質量離散化方法把原轉子系統簡化；採用matlab語言編制了對傳遞矩陣法計算多柔盤轉子-支承系統的臨界轉速；用matlab語言對riccati傳遞矩陣法和有限元法編制了程序計算系統的不平衡響應；並針對其過臨界轉速時振動較大的現象，提出採用變間隙控制油膜剛度和阻尼，從而使原系統的在特定轉速（臨界轉速）的一段范圍內不平衡響應減小；並從被動控制與主動控制兩方面進行數值模擬，取的了較好的控制效果。Abstract : the resistance formulas of air - flow through grain layer which are commonly used are collected in this article. the resource, relationship and usage coverage of these formulas are discussed. the values from these formulas are compared. and the factors influencing the resistance are stated. at the end of this article, the attention which should be paid concerning air - flow resistance through grain is pointed out
文摘:本文匯集了糧層阻力的主要計算公式，指出各公式的來源、相互關系及使用范圍，對這些公式的計算值進行了比較，分析了各因素對糧層阻力的影響，指出計算糧層阻力時應注意的問題。The problem about neutral - point - grounding mode is an all - around technical problem which associated with not only power system reliability ， insulation coordination ， electromagnetic interference ， but assault safety 。 in china ， the neutral grounding modes of the 10kv net involved of none grounding, grounding by arc suppressing coils, resistance grounding or reactance grounding in the past 。 with the development of civic power network ， low resistance grounding mode was used to restrain the over voltage, particularly in guangzhou, shanghai ， beijing ， and zhuhai etc. it was reported that the over - voltage level of low resistance grounding mode is lower than that of arc suppressing coil mode, but the operation carried out the other way 。 at substations in guangzhou and shanghai it was found that the low resistance grounding mode is successful 。 but in some areas ， such as zhuhai ， substations grounding with low resistance revealed some problems ， including power supply reliability rapidly dropping ， transmitting line often tripping ； and person safety being threatened 。 so interiorly the grounding mode selection of the 10kv network was disputed, which mainly focused on the fault form of 10kv net grounding, the apply area of suppressing arcing coil grounding mode, power supply reliability level of the two modes, person safety, communication interfere and the workload of maintenance
爭議點主要是在10kv電網接地故障的形式、消弧線圈接地的應用范圍、兩種運行方式供電可靠性的高低、人身安全、通訊干擾和運行維護工作量等諸多方面。 11 17本論文就是針對以電纜為主的城區10kv電網中性點接地方式的選擇問題進行研究。論文首先對10kv電網的中性點運行各種方式進行分析，比較各方式的特點，然後以重慶儲奇門變電站10kv電網的實際參數來建立數值計算模型，在考慮了電網接地電容電流變化、中性點電阻取值大小、接地點接地電阻值變化等多種影響因素的情況下，對中性點經消弧線圈接地和經小電阻接地方式下電網的過電壓水平和接地點短路電流大小進行了數值計算，其計算結果與電科院所作現場試驗進行了比較。Besides, scan rate and cycle period also affect the result ; co - deposition of dualistic oxide is a focus of research, as an element in the same group, ir is selected. deposition rate of composition is decreased by the adding of ir composition, and when the proportion of ir exceeded 50 %, composition procession can be ceased. but cooperation of ir and ru oxide can highly increase the specific capacitance of active material ; annealing treatment under a certain temperature can help to change the hydrate ru composition into mixture state ru oxide, accordingly increase the stabilization of active material
研究表明:電解液的配製過程中，氯化釕濃度、溶液ph值、陳化時間、溶液溫度對電鍍效果均有影響，其中溶液ph值是最主要的影響因素;在儀器的使用條件探索中，理論結合實驗確定了本電鍍液體系循環伏安電勢窗的理想范圍，並發現循環伏安掃描速度和掃描周期對電鍍結果也有較大影響;混合氧化物的共沉澱是目前研究熱點，在此選用與釕同一族的銥作為共沉澱元素，銥的加入會阻礙氧化物的沉積速度，銥的比例超過50 %會使沉積作用停止，但是二元氧化物的協同作用使沉積的活性物質比容量大大提高;一定溫度下退火后處理作用會使水合釕化物轉變成混合價態的氧化釕，從而提高活性物質的穩定性。Under the favorable condition, liability can redound firm value. when liability blow excess a definite blow, it will reduce the increment for the exist of net lost of expectant bankrupt and net lost of agency, which will reduce firm value, obstacle the rise of firm liability rate and keep firm liability in the definite range
在有利的條件下，負債能增加企業價值。當負債額超過一定限額時，由於預期破產成本的存在和代理成本報存在，從而削略這種增量，甚至，使企業價值減少，阻止企業的負債率的上升，使企業的負債率保持在某一范圍內。On the basis of above parts, this paper discusses the noise muffling of several kinds of plates. it gives the modifying formula of the mass law and verifies its accuracy with an example. at last, this paper explains the effect of stiffeners and damping on the plates " muffling characteristics
在認識隔聲理論的前提下，研究了板在寬頻域范圍上的隔聲特性，並總結了板材加筋以及敷設阻尼對結構隔聲的影響，具有一定的工程實用價值。High iimpedance over a wide frequency range to eliminate emi / rfi
在較寬的頻率范圍內有高阻抗值及emi / rfi消作抑制效果。For example, when the design flow of upward of the peace bridge of upward of the east - one main canal is 45m3 / s, the actual flow quantity is 23. 8m3 / s on the 30th of september in 1989, the water level of the transition region terminal of the mouth of hao wan flume of the east - one main canal had gained the design level of 4. 3m, and the level between downstream and shang tian yuan tunnel was generally higher. it says that the actual discharge capacity now is only about 24m3 / s which is half of the design value. this not only make the benefit of the irrigation district abnormal, but also greatly hinder the economic development of the irrigation district, and lead to the canal run frequently at small flow, high water level, lengthen the discharge duration
如東一乾渠上段太平橋以上設計流量45m ~ 3 s ， 1989年9月30日實測通水流量23 . 8m ~ 3 s時，東一乾渠郝灣渡槽出口漸變段末端水位已達到設計水位4 . 3m ，其下游至上天院隧洞水位也普遍偏高，即東一乾渠上段目前僅能通過流量24m ~ 3 s左右，只有設計值的50左右，不僅使灌區效益得不到正常發揮，嚴重阻礙了灌區范圍內的經濟發展，而且使渠道經常處于小流量、高水位運行，延長了次通水時間，大大增加了渠道工程的安全管理難度。Aiming at the defects of the imc - 70 model stubble - plastic film residue collector that the draft is rather great and the plastic residue or stubble are sometimes left out in the operation process, formulas for the principal parameters of the knives have been driven out based on the analysis of the distribution manner in the field of the stubble and plastic film residue, the variation range and the variation tendency of the principal parameters for the reduction of the draft have been found on a trial basis in the corn field through theoretical analysis and experimental study and a mathematical model for the draft applied on the knives has been established in accordance with the movement and distortion of the soil under the action of the knives
本文針對1mc ? 70型地膜回收起茬機起膜、起茬鏟刀在作業中阻力大，殘膜、根茬有漏起的現象，通過對作物收獲后殘膜、根茬在田間分佈情況的分析，推導出鏟刀滿足生產要求主要參數的求取方法和公式，並經理論分析和試驗研究，確定了鏟刀對玉米茬地進行起膜、起茬時主要參數的取值范圍和減小牽引阻力各參數的取值規律。以鏟刀作用下土壤的運動變形為基礎，建立了鏟刀牽引阻力模型。It turns positive at this point and remains so throughout its normal operating temperature range
在這個溫度下時，阻值變為正值，並在整個正常操作溫度范圍內保持正值。At this temperature it turns positive and remains so through - out its normal operating temperature range
在這個溫度時，阻值變為正值，並且在整個正常操作溫度范圍內保持正值。Compared with the similar research results, the weighted control ic here has the following characteristics : ( 1 ) the circuit structure is simpler ; ( 2 ) the chip ' s fabrication is compatible with standard cmos process ; ( 3 ) n - mosfets with high w / l ratio and short channels are used for weighting and output to reduce the insertion loss ; ( 4 ) the weighting factor varies in a relatively wide range with the controlling signals ; ( 5 ) input and output impedance approach 50 in low frequency ( e. g. 50mhz ), while in higher frequency they slightly deviate from 50, hence the energy reflection lower than 0. 1 ; ( 6 ) it completes the functions of sampling, weighting, controlling and summing of high frequency analog signals
它的加權控制電路與已報道的相關電路相比具有如下特點：電路結構簡單；製造工藝與普通cmos工藝兼容：短溝道，高寬長比的nmos晶體管具有低的通導電阻，將其作為加權、輸出器件可降低由電路引起的插入損耗；改變加權信號，可實現權值在較大范圍內的連續變化；輸入、輸出阻抗在低頻（如50mhz ）下接近50 ，而在高頻下略有偏離50 ，但反射系數均低於0 . 1 ；實現了對高頻信號的取樣、加權、控制、疊加功能的迭加。This paper gained correlation conclusion about linear inversion pass through large numbers of test calculates, put emphasis upon the discussion of run parameters " acquired value extent about this algorithm is applied to wave impedance, gained the reference acquired value extent of run parameters
通過大量的試算，給出了線性反演的相關結論，重點討論了採用本文編制的遺傳演算法用於波阻抗反演的運行參數的取值范圍，並由試算結果給出了運行參數的參考取值范圍。Spin - valve gmr is a member of gmr materials. it ' s not sensitive in a typical magnetic field intensity but it ' s very sensitive with the direction of magnetic field, and so it ' s useful in angular sensors
自旋閥gmr是gmr巨磁阻材料的一種，它在一定的磁場范圍內對外磁場的大小不敏感，但對外磁場的方向很敏感，因而在開發角度傳感器上有一定的應用價值。The way to eliminate chaos phenomenon through adjusting system parameters is indicated. the nonlinear dynamic behavior of journal bearing - rotor system in large parameter space is studied in numerical integral method and floquet theory and the first and second bifurcation behavior of nonlinear rotor system are discussed ; the concept is advanced that realizing the controllable nonlinear stiffness with sfd with the soft - nonlinear of sma in the super - elasticity state to make the vibration amplitude of system always be in the small solution state to reduce the vibration amplitude of rotor system
運用數值積分方法結合floquet理論對滑動軸承-轉子系統的大參數范圍非線性動力學特性進行了全面的研究，詳細地討論了系統的一次和二次分岔行為； 5 ）提出了用形狀記憶合金在超彈性狀態下的軟非線性，結合擠壓油膜阻尼器實現系統剛性的非線性可控，降低系統在非定常狀態下的最大振幅的構想。This paper mainly accomplished the following research : summarize the classify and application fields of four - probe testing technology ; take the square four - probe testing technology study by using the advantage of rymaszewski method in auto - eliminating the portrait wandering influence to induct ry method to square - probe testing method ; deeply study the influence of probe wandering to progressed ry method testing result ; complete the design of testing panel and testing circuit, realize the auto - testing of mono crystal wafer ; discuss the image enhancement and threshold selection problem in image identify, and finally accomplish the identify of probe pinpoint. the main new view points of the research : 1. it is the first time for applying image manipulation and analysis technique to the sheet resistance measurement, and achieving the auto - location function of the probe
為此，本文開展了以下研究工作：綜述了四探針技術的分類以及應用范圍；對方形四探針測試技術進行了研究，利用rymaszewski法自動消除探針縱向游移影響的優點，將它應用於方形探針測試法中，並對探針游移對改進rymaszewski法測試結果的影響進行了深入探討，提出了用圖像識別技術監測測試進行的方法；完成了測試系統的測試平臺以及測試電路的設計，研製出具有圖像識別功能的斜置式方形探針分析儀一臺，實現了矽片電阻率測試的自動化；對圖像識別過程中涉及到的圖像增強和閾值選擇問題進行了論述，最終實現了對探針針尖的圖像識別以及探針測試結構的自動調整，保證了方形探針測試儀的測試精度。Also the green silicon carbide has a negative resistance temperature characteristic from room temperature to approximately 1200 f ( 650 c )
這種新型的碳化硅除在室溫至1200 ? f （ 650 ? c ）范圍內其存在負阻值。The sand is provided with the pseudo - cohesion c by reinforcement, which verified " the frictional reinforcement theory " and " the pseudo - cohesion theory " ; ( 2 ) the vertical pressure can influent the friction only within certain limits ; ( 3 ) the frictional performances of different filling with the same reinforcement are different ; ( 4 ) when the reinforcement and filling are similar, the development of the friction between reinforcement and filling is influenced by physical state of filling ; ( 5 ) the achievement of experiment are applied to project
砂土加筋后具有較大的準粘聚力c值，這證實了關于加筋土原理中的「摩擦加筋理論」和「準粘聚力理論」 。 （ 2 ）當垂直壓力在一定范圍內時，垂直壓力越大，摩阻力越大；但當垂直壓力超出一定范圍后，其對摩阻力的影響逐漸減弱， f曲線趨于平緩，且似摩擦系數隨垂直壓力的增大呈非線性減小。When the content of nife _ ( 2 ) o _ ( 4 ) reaches to 30 %, the maximum mr value gets to - 6 % at the temperature from 310k to 340k, and the resistivity ranges from 1354 to 646 cm, where applied magnetic field is 1. 8t. it is interesting that the mr value is negative which is different from that of the usual material ; 4. with the decreasing of sr contents, the resistivity of composite samples ( nd _ ( 1 - x ) sr _ ( x ) mno _ ( 3 ) ) _ ( 0. 7 ) / ( nife _ ( 2 ) o _ ( 4 ) ) _ ( 0. 3 ) changes apparently, at the same time, the mr gets worse ; 5
3系列復合樣品的電阻率顯著變化，同時磁電阻性能逐漸變差; 5 .隨著cu含量的增大，伽嘶67sr033mnl一uyo3 ） 07 /困ifezo4 ） 03系列復合樣品的電阻率顯著變化，同時磁電阻性能得到明顯改善，當cu含量增大到y = 0 . 2時，樣品磁電阻值在293k到317k較寬的溫度范圍內基本保持在一13 . 6 % ，隨溫度變化很小，由於該溫區恰好在室溫范圍且溫區寬，因而具有很好的潛在應用價值。Our national capacitance metrology level in the low frequency range ( below 10 khz ) has reached the international advanced level. but with the development of science and technology, there exists a big difference between our national and international advanced level in the aspect of the frequency range and the capacitance range etc, especially in the aspect of the frequency range. so the capacitance metrology technology in high frequency cannot meet the need of testing for impedance metrology standards and the measurement instruments
在低頻段（ 10khz以下） ，我國電容計量水平已達到國際先進，但隨著科技的發展，在頻率范圍、量值范圍等方面與國際先進水平有較大的差距，特別是在頻率范圍方面，不能滿足進口阻抗計量標準器及其測量儀器的檢定測試要求，迫切需要在頻率范圍上進行擴展。分享友人