three-phase field 中文意思是什麼
three-phase field
解釋
三相區-
First, in order to verify the correct of this retrieval month, by using the data of three - dimensional wind field, raininess field and temperature field that are output by mm5 numerical simulation, we climate the radial velocity field and echo intention field in the in - phase observation area of dual - doppler radar, then, on the base of the upwards retrieval theory and using the radial velocity field and echo intention field in the in - phase observation area of dual - doppler radar, we retrieve the atmospheric three - dimensional wind field
首先，為檢驗此種反演方法的可靠性，我們使用mm5數值模式輸出的三維風場、雨強場、溫度場等數據，分別模擬生成兩部雷達同步觀測區的徑向速度場和回波強度場，然後根據以上的反演理論利用模擬的雙多普勒天氣雷達觀測到的徑向速度場和回波強度場反演出大氣三維風場。 -
As to the simulation, three - dimensional n - s equations and two - phase flow model, in which the liquid toluene spray as discrete particles was considered, were employed to describe the turbulent combustion processes in the combustion chamber. the mass and energy transfer between the two phases were calculated by the droplet evaporation model, and the arrehnius model was used to obtain the gas chemical reaction rate. the details of 3d flow field, the distributions of temperature and compounds were obtained by solving the equations
數值模擬方面，應用三維湍流n - s方程以及顆粒軌道模型描述了激光器燃燒室內部的噴霧兩相燃燒流動過程，兩相之間的質量、能量交換由液滴蒸發模型計算，氣相化學反應速率由arrhnius公式計算，通過耦合求解氣液兩相模型方程，模擬了燃燒室三維流場，得到了燃燒室內的溫度和組分濃度分佈。 -
Abstract : we have studied the spontaneous emission from a three - level atom with an external - driving field in a photonic crystal. as a result of quantum interference and photon localization, the population in the two upper levels displays quasi - oscillatory oroscillatory behavior. this depends on the initial atomic state and the relative positions of the two upper levels from the forbidden gap. the intensity and the phase of the external field can affect spontaneous emission from the atom. the properties are different from a three - level atom either in vacuum or in aphotonic crystal without an external driving field
文摘:討論了在雙光子驅動場作用下，三能級原子在光子晶體中的自發發射問題.由於量子干涉和光的局域化作用，兩個上能級中的占據數將具有周期振蕩或準周期振蕩的性質，這不僅依賴于兩個上能級與禁帶的相對位置，同時也依賴于原子的初始狀態，而且還與驅動場的強度、驅動場的入射位相有關.這些性質既與真空中帶有驅動場的原子的自發發射性質不同，也有別于無驅動場作用下光子晶體中三能級原子的自發發射性質 -
Although there have been many application instances in the field of input / output device technology, we need an specific project and technology route aimed at an given application. in this thesis, we combine the introduction and analysis of relative technology to describe the accomplishment of a coordinate collecting device which is based on incremental rotary encoder. this device is an specific device applied to collect the corrdinate displacement of ground image ’ s three - dimensional model created by full digital photogrammetric station. cpld chip and vhdl are applied in this device to carry out the following work : phase control of the electrical pulse created by incremental rotary encoder, counting the number of electrical pulse, controling the state of signal processing circuit, exchanging data between this circuit and pci control
本文結合相關技術的介紹和分析，描述了一個基於增量式旋轉編碼器的坐標參量採集介面卡的實現，此介面卡是一種用於採集全數字攝影測量系統地面影像模型坐標位移量的專用設備，該設備採用cpld器件和vhdl語言實現增量式旋轉編碼器的脈沖信號鑒相和計數、信號處理部分的狀態控制以及和pci總線晶元ch365之間的數據交換和通信功能，同時該設備的驅動程序基於wdm模式，並且配置有結構良好的動態鏈接庫程序作為系統軟體和驅動程序之間的數據和控制交互中間介面，能夠方便地運行在windows98 / 2000 / xp操作系統平臺上，具有實時性強、工作穩定、通用性較好和性價比高等特點。 -
Motion control is a comprehensive subject. modern ac drive is a important embranchment in the field of motion control. however, it is difficult to rea1ize high - performance ac drive systems because induction motors are a kind of strongly - coupled nonlinear system with many variables and the torque is not easy to control. with vector control technology decoupling and torque control of ac motor are solved. the basic idea of vector control is that three - phase system is equiva1ent to two - phase system by coordinate transformation and it realizes the decoupling between field current and torque current of the stator in order to control the flux and current respectively, thus induction motor can be considered dc motor and high performance is achieved easily. with the progress of electric and electronic technology and the development of computer, high - integrated special modules and high - precision digital signal processor ( dsp ) are applied to ac drive so that vector control has been developed rapidly
但是高性能的交流調速系統實現很困難，這是因為交流電機是多變量、強耦合的非線性系統，不易實現高性能轉矩控制。矢量控制技術則解決了交流電機解耦與轉矩控制問題，其基本思路? ?應用坐標變換將三相等效為二相，實現定子勵磁電流分量與轉矩電流分量之間的解耦，達到對交流電機磁鏈與電流分別控制的目的，交流電機等效為直流電機實現高性能調速。隨著電力電子技術的進步，計算機技術飛躍發展，高度集成的專用模塊和高精度的數字信號處理器應用於交流傳動系統中，促進矢量控制迅猛發展，日趨成熟。 -
At last, three - dimensional mathematical model of gas - particle two phase turbulence was established, and it was adopted to study the gas - particle two phase rectangular jet as well. the distribution of the time - averaged velocity and turbulence intensity was studied, and some of the simulation results were compared with the experimental results ; the coherent structure of flow field was described in the three direction, the evolution and motion of the eddies was discussed too ; the dispersion of fine particles in the three dimensional space was also investigated
全面地分析了矩形射流氣相時均流場的速度、湍流強度的空間分佈規律，並就部分數值模擬結果與實驗結果進行了對比研究;描述分析了氣相流場湍流擬序結構，對流向、橫向和展向三個方向旋渦的空間結構特點進行分析研究，並分析了流向渦隨時間變化的發展、運動規律。 -
Three - phase synchronous generator with brushless exciting regulator for drilling engineer in the oil - field
用於油田鉆井工程的三相無刷勵磁同步發電機 -
In chapter 2, we analyzed the effect of the driving field phase fluctuation on the gain and dispersion and population differences in an open v - type three - level non - inversion lasing system and then discussed the effects of the incoherent pumping rate, the ratio of the atomic injection rates, the atomic exit rate, the rabi frequency of the probe and driving fields and their corresponding detuning on the gain, dispersion and population differences of the system, and got some important conclusions different from those in closed or other open systems
第二章討論了驅動場的相位漲落對開放的v型三能級無反轉激光系統的影響，根據解析解的數值計算結果討論了非相干泵浦速率、粒子注入速率之比、粒子退出速率、探測場和驅動場的rabi頻率和相應失諧對系統增益、色散和粒子數差的影響，得到了一些不同於封閉的v型系統及其他開放的無反轉激光系統的重要結論。 -
From 100 meters to 2 meters, the restriction of angle of view is considered. during different phase, using different focus of image sensors to keep the image of feature points in the field of view ( fov ). and then analyze the three kinds of random noise affecting ccd imaging quality
在目標器上配置多特徵點的條件下，建立了運動參數的測量模型，並對此模型進行了誤差分析，得到影響測量精度的誤差因素；同時，為保證目標器的特徵點在整個交會對接過程中不溢出視場，提出了在100m 2m的交會對接過程中對ccd視場角的約束條件。 -
Abstract : first, the key magnet statuses and their pertinent mmf. position of exterior rotor brushless dc motor are described in this paper. second, the air - gap magnetic field and the armature reaction of the three - phase six - step exterior rotor brushless dc motor used in electrical bicycle are analyzed by means of mmf. vector, mmf. integration and magnetic field fem respectively. some valuable conclu - sions for designing this kind of motor are obtained
文摘:給出了外轉子無刷直流電動機的典型磁狀態及其對應的磁勢矢量位置，並用磁勢矢量合成法、磁勢積分法及電磁場的有限元方法對電動自行車用三相六狀態外轉子無刷直流電動機的氣隙磁場及電樞反應進行了詳盡的分析，從而得到有益於該種電機設計的結論。 -
If balanced three - phase current flow through these three - phase distributed windings, a rotating magnetic field of constant amplitude and speed will be produced in the air gap and will induce current in the rotor circuit to produce torque
如果平衡型三相電流流經這三相分散式繞組，將在氣隙中產生振幅及速度穩定的旋轉磁場，並會誘發電流在轉子迴路產生轉矩。 -
Three - phase scr controlled rectification power supply has been widely used in the high power industry area. the key control elements of trigger and regulator are hotspots of research in power electronics field
三相晶閘管可控整流電源廣泛應用於大功率工業控制領域，其中的核心控制環節觸發器和調節器的設計是電力電子領域的研究熱點。 -
The emission spectrum for the a - type three - level atom interacting with a squeezed coherent field is not only dependent on the squeezing degree r, but also on the phase angle 0
揭示了好腔中由壓縮相干場驅動的型三能級原子發射譜不僅依賴于決定壓縮程度的壓縮因子r而且依賴于決定壓縮方向的相位角。 -
We clarified that if the three - level atom and the two - mode cavity field are all in the coherent superposition state, the different transition processes interfere each other, the emission spectrum exhibits phase sensitivity. second, the phase properties of the two - mode su ( 2 ) coherent field interacting with a - type three - level atom and the two - mode su ( 1, 1 ) coherent field interacting with two atoms are investigated
我們考察了雙模su （ 2 ）相干場與型三能級原子相互作用系統以及雙模su （ 1 ， 1 ）相干場與雙原子相互作用系統中雙模光場的相位性質，證明了光場每個j迄兇博士學位論文docioraldisser 」 i人lion -
Using the three - phase model of levin and who ’ s force - field analysis way, the author analysis the process, the contents, the success factors, and the matters must be pay attention to in the planned organization change
本文在研究中利用了勒溫提出的三階段模型和力場分析法來分析計劃性組織變革的過程、內容、成功因素，以及其中必須注意解決的問題。 -
Phase transition behaviors and magnetizations of three - dimensional transverse crystal field dilution ising model
模型的相變行為及磁化 -
After the field - oriented control of three - phase pmsm drive system is introduce in brief, a mathematical model of multiphase pmsm, taking a six - phase pmsm with a dual - star winding for example, is derived by coordinates transformation and the control picture is designed
本文以雙y移30六相永磁同步電機為例，在簡要介紹三相永磁同步電機矢量控制的基礎上，通過坐標變換建立了多相永磁同步電機矢量控制的數學模型，並構建了控制圖。 -
The electric field of phase - phase, phase - earth of three - phase arc quenching chamber of the circuit breaker is calculated, insulation character is analyzed and the circuit breaker ' s whole insulating structure are ensured
計算了斷路器三相滅弧室斷口相間、相對地等的電場分佈，對絕緣性能進行了分析，確定了真空斷路器整體絕緣結構。 -
When the cavity field is initially in photon number state or mixed state, the emission spectrum of the two - level atom has nothing to do with the phase of the atomic dipole. if the cavity field is initially in the coherent superposition of photon number state, the emission spectrum of the two - level atom exhibits phase sensitivity. if a a - type three - level atom is initially in the coherent superposition of its two non - degenerate lower states, the emission spectrum depends on the phase of the atomic dipole
證明了初始時刻驅動場處于光子數態或者光子數的混合態時，二能級原子發射譜與原子偶極矩的相位無關，只有當驅動場初始時刻處于光子數的疊加態時，原子發射譜才依賴于原子偶極矩的相位；而初始時刻處于兩個下能態相干疊加態的型三能級原子發射譜對原子初態的依賴關系卻不受單模驅動場的影響。 -
1 balanced three - phase currents flowing in the three - phase symmetric winding will produce a rotating magnetic field
平衡三相電流流過三相對稱繞組產生一旋轉磁場。
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