磁力差 的英文怎麼說
中文拼音 [cílìchā]
磁力差
英文
magnetic deviation-
Undesirable magnetic coupling can occur as a result of an error in the alignment of the torquing system.
力矩系統校直存在的誤差能產生不希望有的磁性耦合。In this thesis, the development of emulsion polymerization theory and related new technologies are comprehensively reviewed, and the synthetic technologies of acrylate latex modified by organosilicon both at home and abroad are also reviewed. based on the current development and research in this field, attentions of this study are focused on three ways for preparing novel acrylate latexes modified by organosilicons, that is, 1 ) the acrylate monomers are copolymerized with unsaturated silicons by emulsion copolymerization ; 2 ) a new latex with microphase separation morphology is synthesized, which shows a core - shell structure character ; 3 ) soap - free polymerization is explored for preparing a higher - performance latex using an unsaturated silicon monomer, different acrylates and a reactive emulsifier. by using techniques of delaying addition of organosilicon monomer and a hydrolysis inhibitor, the hydrolysis and condensation of 3 - ( trimethoxysilyl ) propyl methacrylate during polymerization can be effectively prevented, as a result, organosilicon content in the macromolecular chain is increased
同時採用有機硅單體延遲滴加及添加水解抑制劑等技術，有效防止了-甲基丙烯酰氧基丙基三甲氧基硅烷在乳液聚合過程中的過渡水解及縮合反應，提高了聚合物大分子鏈中有機硅鏈節的含量；利用紅外光譜與差示掃描量熱儀對產物分子結構進行了表徵，並通過對共聚產物力學和吸水率的測試，證實了本研究所制備的有機硅改性丙烯酸酯共聚物具有比純丙烯酸酯聚合物更優良的力學及耐水性能；從分子設計角度出發，利用醇解反應合成出水解、縮合反應速率較慢的兩種新型不飽和有機硅單體： ?甲基丙烯酰氧基丙基三乙氧基硅烷和?甲基丙烯酰氧基丙基三異丙氧基硅烷；利用核磁共振對新型硅烷單體結構進行了證實；研究表明利用新型硅烷單體可以制備出高硅烷含量的有機硅改性丙烯酸酯乳液，且其聚合產物具有較高的力學及耐水性能。The original orientation ( i. e. the mol with respect to the geographical north ) of the core in the formation can be obtained by palaeomagnetic orientation tests. the two results are combined to define the direction of the maximum principle stress of the well or field
該方法根據差應變分析（ dsa ）實驗確定地應力相對于巖心標志線的方向，利用古地磁方法確定巖心標志線相對于現代地理北極的方位，兩者結合確定地應力方向。Abstract : based on analysis of the operational principle of the traditional inductosyn digital display meter in the paper, the contradiction between detecting resolution ratio and antidisturbance ability is discovered. and then, to resolve the contradiction, the method of demodulation technology and high frequency excitement technology being used is advanced
文摘:通過分析傳統鑒相型數顯表的工作原理，揭示了其檢測解析度與抗干擾能力之間的矛盾，並提出了採用差頻解調和高頻激磁等技術解決矛盾的方法。The verify experiment proves that its ratio and phase characteristics are much better than ordinary ones and the precision is enough for measure use. zero - flux current transformer can ’ t obtain absolute zero flux because residuary flux, so when the secondary turns is too small it will not satisfying. to improve the precision further, proposes a method to compensate zero - flux current transformer using capacitance parallel connected coil and deduces it
為了進一步抵消剩餘磁通，提高互感器的精度，提出了一種並聯電容線圈補償零磁通的方法，並進行了理論推導，設計了基於該方法的100匝電流互感器，通過校驗證明它可以改善零磁通電流互感器的比差和角差特性，提高互感器的精度，將電流互感器的二次匝數由普通互感器的幾千匝降到了100匝，提高了測量微小電流的能力。We studied the influence of the interface strain and it shows that the lattice mismatch between substrate and film is the main reason of the above observations. expand strain decreases tm - i with increasing resistivity and compressed strain has the opposite effect. using double exchange model of zener these results can be explained qualitatively
27歐姆厘米，轉變溫度是78與154開爾文，磁場強度為7t時，磁阻率為習3及巧6 x結合雙交換模型和不同的應力作用，逐一解釋了產生差異的緣由，其中我們也討論了具有）取向的la 。Digital temperature transmitter, digital level, explosion - proof electric contact manometer figures generally used manometers, vacuum table, table vacuum pressure, oxygen forms of electric contact manometer, explosion - proof electric contact manometer seismic contact ammonia electricity connections. contact monometers assisted magnetic, seismic, heat - resistance, acid and alkali resistance, chlorine, sulfur - resistant, stainless steel pressure gauge. divide manometer shenyang city, the total, precision manometer, out of the wind pressure gauge, film boxes pressure gauge, diaphragm pressure gauge
主要產品包括：數字壓力表，數字膜盒壓力表，數字溫度表，數字壓力變送器，數字溫度變送器，數字液位計，數字防爆電接點壓力表，一般用壓力表真空表壓力真空表氧氣表電接點壓力表防爆電接點壓力表耐震電接點氨用電接點磁助式電接點壓力表耐震耐高溫耐酸耐堿耐氯耐硫全不銹鋼壓力表隔膜壓力表沈陽市優質產品精密壓力表出風壓力表膜盒壓力表膜片壓力表全不銹鋼膜片壓力表鈦壓力表及出口全不銹鋼，充油全不銹鋼系列壓力表，壓差表，壓力變送器，各種軸向軸向帶邊法蘭連接等多種形式。The stability of electric power system has been being focused for a long time toprevent a power system from losing synchronism after sudden fault ， researchers have done much work and got many accomplishments this paper applied the direct feedback linearization ( dfl ) technique on the power system ， a strong nonlinear system simulation results by matlab proved this method efficiency main works and results are as follows ： this paper compared some existing methods in excitation control ， fast valve control and coordinated control respectively, analyzed the developments and actuality of nonlinear control research in brief, illustrated why ransient stability could be greatly improved by using the fast valve control in chapter 3 ， indicated the importance of coordinated control farther this paper introduced the inverse system theory, based on which ， discussed the dfl theory, pointed out which had consistency with the inverse theory, expanded the dfl theory combined the idiographic model equations ， made which adapt to the model of a single machine - infinite bus power system this paper referenced abundance articles and educed a set of equations ， which could describe the dynamical process of excitation and fast valve control for synchronous generators in the equations ， there were several very important parameters of power system - - rotor angle ( ) ， rotor speed ( ) ， generator q axis voltage ( eq ) ， transient voltage ( e ' q ) ， active power ( pe ) ， mechanical input power ( pm ) ， valve opening ( ) ， generator terminal voltage ( vt ) ， based on the model ， nonlinear coordinated controller and terminal voltage optimal controller have been designed by using the expanded dfl theory and lq optimal control theory the simulation results showed that the controller could keep power system transiently stable under the effects of a symmetrical 3 - phase short circuit fault ， which achieved better postfault regulation compared with another two routine methods ， one is the proportion excitation controller and proportion fast valve controller, the other is the proportion excitation controller and the optimal fast valve controller, which could exert good performance when met 1ittle disturbance either
在介紹逆系統理論的基礎上，詳細介紹了dfl理論，通過比較闡明了dfl理論其本質是逆系統方法的一類，並結合具體課題推導出的模型方程將dfl理論進行了擴展，使之適應于電力系統這個強非線性對象。通過參考大量的書籍文獻推導出一套實用的可將大型汽輪發電機勵磁與汽門綜合起來進行控制的模型方程，此模型方程涵蓋了電力系統中特別引人注目的幾個量- -轉子角、轉子轉速、發電機q軸電勢eq 、暫態電勢e ' q 、有功功率pe 、機械功率pm 、汽門開度、機端電壓vt ，在此基礎上建立了實用的電力系統簡化的數學模型，並將擴展的dfl理論應用於此模型系統，結合線性二次型最優控制理論設計出大型汽輪發電機的非線性綜合控制器及機端電壓最優控制器，通過模擬實驗與採用常規的按電壓偏差進行調節的比例式勵磁控制器+汽門比例控制及採用常規的按電壓偏差進行調節的比例式勵磁調節器和基於二次型性能指標設計的最優快控汽門（考慮發電機的飽和因素）進行了對比，證實了採用此種控制器可以有效地提高電力系統的暫態穩定性，並且在電力系統遭受小干擾時同樣具有良好的調節性能。Focusing on some disadvantages which exist in the training of measuring and eliminating deviation of magnetic compass in the labs of colleges, this article put forward how to develop a training system of measuring and eliminating deviation of magnetic compass, to build an integrated training lab so as to improve the ability of navigating officers in measuring and eliminating deviation of magnetic compass
針對當前院校在實驗室進行磁羅經自差測定與消除訓練中存在的一些弊端，提出開發研製磁羅經自差測定與消除模擬訓練系統，建設磁羅經自差測消訓練綜合實驗室，以提高航海人員對磁羅經自差的消測能力。In order to improve the behavior of transformer protection that is incomplete at present in distinguishing magnetizing inrush current from fault current, the paper puts forward a kind of new principle of transformer differential protection after analyzing the characteristic of magnetizing inrush and active power consume of transformers. this protection uses differential protection based on positive sequence active power as a criterion to discriminate internal faults from magnetizing inrush, and ratio restraint differential current protection as a signal to touch off the protection
針對當前電力系統中變壓器保護由於勵磁涌流鑒別理論不完善而導致的誤動率相對較高的問題，論文在分析了變壓器勵磁涌流特性和有功損耗的基礎上，提出了用變壓器正序有功功率差動作為區別勵磁涌流和故障電流的判據，並以成熟的比率制動差流保護作為內外部故障判據的變壓器主保護。In order to resolve the question, in the thesis a simulation arithmetic of hydro - electrical system is put up. the equations of hydro - electrical system are divided to two parts, one of which consists of the differential equations of conduit system, hydro turbine and generator ' s rotator and is solved by characteristic equation arithmetic, the other of which consists of the differential equations of generator, magnetic system and grid and is solved by longge - kuta arithmetic or covert integrated arithmetic. through the alternative solving of the two parts, the simulation results of the large - disturbance transient could be abstained eventually
為解決這一問題，本文提出了一種將水力系統和電力系統方程交替求解的水電系統聯合模擬演算法，即將包括輸水系統、水輪機以及機組轉子等部分的水力系統差分方程作為一部分，將包括同步發電機、勵磁系統以及電網等部分的電力系統微分方程或差分方程作為另一鄭州大學工學碩士論文部分，對前一部分採用特徵線法求解，對后一部分根據模型形式採用龍格一庫塔法或隱式積分法等演算法求解，這兩部分的求解過程交替進行，最終即可得到水電系統大擾動過程的模擬結果。In the forth chapter, the performances of mr dampers designed and fabricated at chongqing university have been tested in national center for test and supervision of coach quality, including schematics of damping force vs. displacement of piston head, damping force vs. velocity of piston head, etc. for some given electric currents of the coil. the experimental results demonstrate that damping force offered by mr damper consists of background damping generated by resistance of mr fluid and damping caused by magnetic field
對不同勵磁電流條件下的理論阻尼力與測試阻尼力進行了比較，分析了產生誤差的主要原因；對阻尼器產生溫度效應產生的主要原因進行了分析，提出了應該提高磁流變體的溫度穩定性；推導了磁流變體的感性和容性流動方程，從理論上分析了磁流變體的感性和容性對阻尼器特性的影響。This mode of valve is a kind of brand - new patent electromagnetic valve developed by this co., with an electromagnetic block as the auxiliary valve and not directly acting on the switch valve while only through adjusting the force difference between the media to get the switch valve, having lower energy consumption, longer duration, more stable performance etc. notable feratures, compared with the traditional electric valves, and extensively used for various water etc. liquids control system
A型閥是我公司開發的一種新型專利電磁閥。電磁塊作為輔閥，不直接作用於開關閥，僅調節介質壓力差獲得開關閥，與傳統電動閥相比具有耗能低壽命長性能穩定等顯著特點。廣泛應用於各種控水油等流質的控制系統。It also builds the mathematic model of all section of vscf ac exited wind power generation system on a - b - b and d - q coordinate system by the coordinate commutation technology. the thesis gives the characteristics of torque, active power, reactive power and the steady - state analysis of it. it proves that the capability of wind generator is determined to slip, the amplitude and phase of rotor voltage, the phase dispatch between stator voltage and rotor voltage
並分析了交流勵磁風力發電機作變速恆頻運行時的工作原理，闡述了與同步發電機、異步發電機的不同之處，分析了其能量平衡關系，在坐標變換技術的幫助下，詳細推導了交流勵磁發電機在a - b - c坐標系和d - q坐標系下的數學模型，分析並模擬了其有功和無功特性、轉矩和功率調節特性、穩態運行和機械特性，證明了發電機的性能由轉差率、轉子電壓的相位和幅值、定轉子電壓相位差所決定的。In short, the method is convenient, economic and reliable and the result applied in the oil fields seems reasonable
綜上，差應變分析和古地磁結合確定地應力方向是一種簡單、經濟、可靠的方法。The model of fujian power grid and models of generators, excitation systems, governor systems and loads are established, the tested excitation system models of large hydro and thermal units, the model of wind turbine are established as well in this paper with pss / e, a new software imported from pti of u. s. a. recently. some key points are proposed on data convertion from psasp and bpa to pss / e. the transient and dynamic characteristics between separate excitation system and transformer - fed excitation ( self excitation ) system are compared with pss / e
本文完成了pss e的福建省電力系統的基本框架以及發電機、勵磁系統、調速系統、負荷的數學模型和參數，實現了大型水、火電廠發電機組勵磁系統實測模型和風電機組的pss e建模，提出了pss e與bpa 、 psasp數據互轉的部分要點，比較了福建電力系統現有大型水、火電廠發電機組它勵與自並勵勵磁方式的動態和暫態性能的差別。Against the status of large scale ultra low frequency air spring vibration isolation platform, which is low damping and poor performance of low frequency, and after analyzing the existing key damping system, a new type differential electromagnetic damping system ( emds ) is developed in this article in order to reduce the resonance peak of the platform effectively and improve the low frequency performance of the platform
本文針對大型超低頻空氣彈簧隔振平臺阻尼小、低頻隔振性能較差的現狀，在比較多種提供阻尼力的方法后，提出了用電磁力作為隔振平臺的阻尼力，並開發研製了差動式電磁阻尼器系統。該系統可以有效降低隔振平臺的諧振峰值，從而達到了提高隔振平臺低頻性能的目的。The perfect magnetic field resolution and finite partial analyzing are future magnet calculating ways, combining magnetic force pump alnicos " character, virtue of gradual change magneto gram and ways of analyzing planar magneto gram by finite partial are introduced, the ways of acquiring demagnetization curve are introduced and illustrated in details
理想磁場的解析求解和有限元分析是磁力計算的未來方向，本文結合磁力泵磁鋼特點，介紹了漸變磁路的優點和利用有限差分法在求解二維磁場的思路和步驟，文中還總結了求解退磁曲線的詳細方法。However flux leakage is really exist, calculation through formular analytic method has more error, so electromagnetic field analysis is made by using finite element method ( fem ) in ansys7. 1 / multiphysics and ansys / emag programs. typical quantities of interest in a magnetic analysis are available such as magnetic flux density, magnetic field intensity, magnetic forces, power loss and flux leakage in the system of magnetic levitation. then gain the current in the coil which control levitation gap when the stage is stable
由於存在漏磁，用公式的解析法計算有很大的誤差，因此本文採用有限元法（ fem ）來計算磁懸浮系統磁場分佈，從而計算磁力，通過用ansys7 . 1軟體進行有限元電磁場分析計算，得到平臺穩定懸浮時電磁線圈所需電流、懸浮氣隙等控制參數，由於設計的磁懸浮系統為非軸對稱結構，採用2d磁場分析有一定的誤差，而採用3d電磁場分析更接近實際。At present, the more wide ways are spray and brush and so on, but these ones have many disadvantages, for example polluting environment, poor adhesion etc. magnetron sputtering is a green one and the adhesion of the film with the substrate is very good
目前應用較廣泛的方法是噴塗和刷塗法等，這些方法普遍存在污染環境、附著力差等缺點;磁控濺射方法能夠實現綠色環保生產，而且膜層的附著力較好。分享友人