例句與造句

1. they are the property of sum and difference beams, the errors of the elements and channels and different pulse repeating frequency ( prf )
   這些因素包括和、差波束的特性、陣元和通道的誤差、不同的脈沖重復(fù)頻率(prf)。
2. their interest in ? a-stap stemmed from the fact that antenna engineers have excelled in the design of high performance sum and difference beam whether for phased array or for reflector antenna
   人們對(duì)這種特殊的空時(shí)二維處理感興趣的原因是無(wú)論相控陣天線系統(tǒng)還是反射面天線系統(tǒng)，天線工程師都可以設(shè)計(jì)出性能很好的和、差波束。
3. aiming at the problem of angle motion estimation in monopulse three-dimension imaging, a novel angle motion parameters estimation method based on the inverse synthetic aperture radar imaging for difference beam is presented
   摘要針對(duì)單脈沖三維成像時(shí)的目標(biāo)角運(yùn)動(dòng)估計(jì)問(wèn)題，提出一種基于差波束逆合成孔徑雷達(dá)成像的新的角運(yùn)動(dòng)參數(shù)估計(jì)方法。
4. the effective index method is applied to simplify an awg structure from 3d to 2d . two simulation methods are presented in detail based on the gaussian beam propagation formula and the finite difference beam propagation method
   文中采用等效折射率方法把三維結(jié)構(gòu)簡(jiǎn)化為二維結(jié)構(gòu)，然后分別基于高斯光束的傳播和有限差分光束傳播方法(fd-bpm)，給出了兩種對(duì)整個(gè)awg進(jìn)行全局模擬的具體方法。
5. using the relation between spectrum width and entropy and the different contributions devoted by each angle motion parameter to the echo spectrum width of the difference beam, the global optimal estimation is obtained through searching the angle motion parameters of zero and higher order via max-entropy and min-entropy respectively
   該方法利用了各階運(yùn)動(dòng)參數(shù)對(duì)差波束回波譜寬度的不同貢獻(xiàn)以及熵與譜寬度的關(guān)系，通過(guò)最大熵和最小熵分別對(duì)0階和1階以上角運(yùn)動(dòng)參數(shù)進(jìn)行搜索，得到全局最優(yōu)估計(jì)。
6. It's difficult to find difference beam in a sentence. 用difference beam造句挺難的
7. and the results of them have been analyzed, from basic one to sum-difference beam measurements which are popular in phased array radar . then there is a deep investigation on the application of sum-difference amplitude comparison in target tracking in the multi-path environment . finally, the origin of multi-path effects is analyzed and some methods to eliminate the multi-path effects are introduced briefly
   從基本的方法入手,過(guò)渡到相控陣?yán)走_(dá)常用的單脈沖和差波束法,分析了這些方法各自的測(cè)角效果;著重研究了多徑效應(yīng)影響下比幅和差波束法在目標(biāo)跟蹤中的運(yùn)用,并分析了多徑效應(yīng)的形成原因,簡(jiǎn)單介紹了幾種常用的多徑消除技術(shù)。
8. 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(dǎo)出滿足單模傳輸?shù)募剐尾▽?dǎo)結(jié)構(gòu)參數(shù);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(shí)分析了將三維結(jié)構(gòu)轉(zhuǎn)化為二維結(jié)構(gòu)的有效折射率法,最后對(duì)y分支的特性進(jìn)行了模擬。
9. on the base, we designed the waveguides " structure and fabrication parameter . and in the design of symmetric y-branch of proton-exchange s ingle-y phase linbo3 modulaor, we used finite difference beam propagation method to analyze and compare the optical transmission loss of different s-bend y-branch
   本文對(duì)質(zhì)子交換linbo_3單y相位調(diào)制器的重要部件y分支進(jìn)行了深入的研究，比較了不同s彎曲形式的y分支過(guò)渡長(zhǎng)度與損耗的關(guān)系，并計(jì)算出間距250m時(shí)的最小彎曲長(zhǎng)度。
10. variational-effective index method and finite difference beam propagation method ( fd-bpm ) are both practicable waveguide simulation tools . the variational-effective index method is based on mixing the variational method ( vm ) and the effective index method ( eim ), it can be used with very accuracy to simulate the field distribution
    變分有效折射率法是變分法(vm)和有效折射率法(eim)的結(jié)合,它能夠很精確地模擬光場(chǎng)分布情況;有限差分束傳播法則能夠準(zhǔn)確地模擬波導(dǎo)的性能。
11. 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(yīng)用時(shí)域有限差分法,結(jié)合波導(dǎo)模式理論對(duì)條形與平面波導(dǎo)進(jìn)行了模場(chǎng)仿真;應(yīng)用廣角有限差分光束傳播法,對(duì)s形彎曲波導(dǎo)的曲率半徑、鄰近耦合、過(guò)渡損耗、功率衰減以及波導(dǎo)與光纖的各種耦合損耗進(jìn)行了數(shù)值分析,并在此基礎(chǔ)上,對(duì)s形波導(dǎo)激光器的結(jié)構(gòu)作了初步設(shè)計(jì)。
12. 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
    本文主要借助這種改進(jìn)的fd_bpm算法，對(duì)兩種結(jié)構(gòu)的光分路器（直y型光分路器，上升正弦型光分路器）進(jìn)行了器件設(shè)計(jì)的軟件仿真，包括對(duì)兩種結(jié)構(gòu)光分路器傳輸場(chǎng)進(jìn)行模擬，并對(duì)兩種結(jié)構(gòu)光分路器的重要參數(shù)，如波導(dǎo)寬度，分叉角，縱橫比，損耗進(jìn)行了仿真計(jì)算；得到了一些有價(jià)值的優(yōu)化波導(dǎo)結(jié)構(gòu)參數(shù)值，根據(jù)這些優(yōu)化值設(shè)計(jì)制作了光刻模板。