bpm 中文意思是什麼
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Then we found the theory model when we study the embranchment wave - guide using fd - bpm
接著我們建立了fd - bpm在分析分支光波導器件時所需的理論模型。 -
For coupling loss, the method to reduce this loss is pointed out without changing other structural parameters decided by the above requirements. y - branch loss is analyzed by bpm ( beam propagation method )
對于耦合損耗，指出了在不改變前面結構參數（因為它們的設計是根據半波電壓和單模要求設定的）情況下，實現小耦合損耗的方法。 -
In this paper, we have studied the feasibility for the bpm of to be button electrode was used in the lia and the simulating has done for the use by pspice / orcad
本文研究了鈕扣電極束位置探測器應用於強流直線感應加速器（ lia ）的可行性，並用pspice orcad電路模擬模擬軟體進行了模擬計算。 -
The button electrode bpm experiments and calibrations have been done on the experimental facilities. the results of the experiment show that the button electrode has an accuracy of 0. 5mm with a resolution of 0. 13mm
在模擬束流平臺上對鈕扣電極進行束位置測量的實驗標定，並根據實驗結果對鈕扣電極束位置探測器裝置進行改進和優化。 -
The button electrode is one that widely used in high energy rf accelerators, such as storage ring, and the bpm made of button electrodes has many merits like high accuracy, high resolution, resisting magnetic field, simple machinery, without magnetic core and low cost, etc. so we want to use the button electrode as the bpm in high current accelerators like the lia
鈕扣電極束位置探測器是一種廣泛應用於射頻加速器儲存環等高能弱流加速器的一種束位置測量裝置，它具有測量精度高、解析度高、不受磁場干擾、機械結構簡單、無磁芯、造價低廉等特點。只是，至今未見有關這種束位置探測器在強流加速器（如，直線感應加速器）上應用的報導，如能將鈕扣電極束位置探測器應用於lia ，將是一件很有意義的事情。 -
Besides the scalar diffraction theory, the simulation method of beam propagation method, which is extensively used in the simulation of integrated optical devices, is also discussed though no successful result of calculation with bpm is given
本文給出了平場輸入和輸出edg的設計方法，並利用標量衍射理論對設計的結果進行模擬，驗證了平場輸出edg具有很好的分波效果。 -
Using the beam propagation method ( bpm ) simulation, we confirm that wide controllability of the branching ratio and low excess loss can be realized by this structure
用bpm方法模擬的結果表明，此結構實現了50 - 94的不對稱分支比，並且具有低的附加損耗的特點。 -
Free speed bpm
空載轉速rpm -
After that, we advanced a new optimized fd _ bpm arithmetic. using of this new optimized fd _ bpm arithmetic, we developed numerical simulation program to simulate the waveguide and finish the template by those simulation results. then we analyzed the interdigital transducer ( idt ) and acquired the device parameters
然後提出了一種改進的有限差分光束傳輸法（ fd _ bpm ）演算法，利用此演算法對器件所需的波導進行了優化模擬計算，根據這些優化值設計製作了光刻模板 -
According to the result of analysis and the fabricating technique of our lab, we designed the parameters of oversized rib waveguide and devices on the polymer / silicon material and simulated the behaviour of the devices by using the bpm method simulation soft named " beamprop "
同時我們利用熱傳導學中的傳導方程和有限差分法對熱電極作用下不同材料結構中的熱場分佈情況作出了分析。利用實驗室現有的beamprop軟體對器件工作情況進行了詳細的模擬，優化了各項設計參數。 -
The bpm system that widely used in linear induction accelerator ( lia ) is beam bugs and b - dot
在直線感應加速器中，廣泛使用的束位置測量裝置（ bpm ）有壁電流探測器（電阻環）和磁探針（ b - dot ） 。 -
The processes described in bpm define the business system ; they do not describe what is required of the computer system
在業務程序模型所說明的程序界定了業務系統，但這些程序並沒有說明電腦系統需求。 -
The finite difference beam propagation method ( fd - bpm ) can simulate the performance of the waveguide accurately. single mode rid waveguide structure parameters are derived by variational - effective index method ; fd - bpm and its transparent boundary condition ( tbc ) are concerned, and then the eim used to transfer a 3d waveguide to 2d waveguide is analyzed ; finally we summarize the characteristic of the y branch
本文先利用變分有效折射率法推導出滿足單模傳輸的脊形波導結構參數;接著介紹了有限差分束傳播法及求解的透明邊界條件，同時分析了將三維結構轉化為二維結構的有效折射率法，最後對y分支的特性進行了模擬。 -
The simplifications offered by bpm reduce the computational complexity of most problems and speed up the computational process for many
而tbc邊界條件是假設在接近邊界處的場為一向外輻射的平面波，其幅值、方向等參數由試探法決定。 -
First, i made and improved some beam propagation method ( bpm ) programs, consisting of 2d ( eim - bpm ) and 3d bpm, with transparent boundary condition ( tbc ) and perfectly matched layer ( pml ) boundary condition respectively
首先建立了光束傳播法（ bpm ）的模擬平臺，解決了邊界問題。利用建立的三維bpm平臺設計了漸變折射率波導的mmi耦合器。 -
On the base of the traditional bpm - i, ii time receiver, and by the deeply studied of the theory of software radio ( swr ) and time receiver, we present the short - wave time receiver design on the concept of software radio
本文建立在傳統的短波定時接收儀的基礎上，通過對授時接收機和軟體無線電理論的深入研究，提出了一種新的軟體無線電概念下的短波定時接收機的實現方案。 -
In this paper, the foundamental principles of fd _ bpm ( finite - difference beam propagation method ) used to simulate and calculate the process of beam propagation is first introduced. then ， the theory of boundary condition is carefully presented. based on those theories mentioned above, a new kind of fd _ bpm arithmetic is brought forward. compared with the traditional arithmetic, this one has much more advantages. in virtue of the new arithmetic, author accomplished the whole simulating designs with two kinds of optical splitter ( stright y - junction optical splitter and sine - type optical splitter ), including propagation field simulating, vital parameter calculating, acquired some optimized waveguide parameters ， and finished the template by those results at last
本文主要藉助這種改進的fd _ bpm演算法，對兩種結構的光分路器（直y型光分路器，上升正弦型光分路器）進行了器件設計的軟體模擬，包括對兩種結構光分路器傳輸場進行模擬，並對兩種結構光分路器的重要參數，如波導寬度，分叉角，縱橫比，損耗進行了模擬計算；得到了一些有價值的優化波導結構參數值，根據這些優化值設計製作了光刻模板。 -
Bpm beat per minute
每分鐘心跳 -
For example, we studied the influence of angle to the propagation efficiency of y - type embranchment and influence of calculation window size, selection of reference refractive index, the interval between dots, the difference of refractive index to the calculation of bpm
例如： y分支的夾角對y型分支波導光傳輸效率的影響，參考折射率的選擇、計算窗口的大小、格點間距值、折射率差的變化對bpm計算精度的影響。 -
Second, the mode fields of a strip waveguide and some slab waveguides have been simulated by applying finite - difference time - domain ( fdtd ) method. the curvature radius ; vicinity coupling ; transition loss and power attenuation of a s - shape bend waveguide have been analysed numerically by employing wide angle finite - difference beam propagation method ( fd - bpm ), as well as the coupling loss of optical fiber and waveguide. in addition, the framework of the s - shape waveguide laser has been
其次，應用時域有限差分法，結合波導模式理論對條形與平面波導進行了模場模擬;應用廣角有限差分光束傳播法，對s形彎曲波導的曲率半徑、鄰近耦合、過渡損耗、功率衰減以及波導與光纖的各種耦合損耗進行了數值分析，並在此基礎上，對s形波導激光器的結構作了初步設計。
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