This thesis discusses mainly the hardware design and development of a simulator for airborn phase array radar. The long period of the simulator is implemented by SDRAM MODULES used in Personal Computer, the broadband is implemented by D/A with internal double-data-channel switching architecture, and the control is implemented by a single CPLD.

本文主要探討了一種機(jī)載相控陣?yán)走_(dá)回波模擬器的硬件設(shè)計(jì)和工程實(shí)現(xiàn)，采用了PC機(jī)內(nèi)存常用的超大容量高速緩存SDRAM MODULES來實(shí)現(xiàn)輸出信號(hào)的長周期欧美A片网址大全，采用內(nèi)部具有雙路數(shù)據(jù)分時(shí)切換結(jié)構(gòu)的D/A實(shí)現(xiàn)輸出信號(hào)的寬帶亚洲日韩色图16p页，采用一片CPLD完成整個(gè)系統(tǒng)的時(shí)序邏輯控制。

Theoretical model for return signal of laser altimeter.

激光測(cè)高儀的回波信號(hào)理論模型久久九九九。

The above motion compensation methods have been tested with all kinds of simulated data and the experimental data acquired from a microwave anechoic chamber when the target makes a turn, and satisfactory results are obtained.

利用模擬的目標(biāo)作各類運(yùn)動(dòng)的回波數(shù)據(jù)和目標(biāo)作轉(zhuǎn)彎運(yùn)動(dòng)的微波暗室數(shù)據(jù)對(duì)上述運(yùn)動(dòng)補(bǔ)償方法進(jìn)行了檢驗(yàn)欧美性爱A视频电影麻豆，獲得了令人滿意的結(jié)果操下面视频在线观看免费欧美。

Applying these methods to Close－in Antimissile Fire Control System (including AA gun control system and laser ranging system), results in a complete set of new methods for it. Finally, an echo simulating model is built for the laser ranging system of a real self－propelled AA gun, and is investigated by using SCTROF. The results show that SCTROF is effective.

本文還利用這些成果，為近程反導(dǎo)火控系統(tǒng)中的控制系統(tǒng)（包括火炮控制系統(tǒng)與激光測(cè)距控制系統(tǒng)）提供了一套完整的操人在线网站、新的設(shè)計(jì)方法人人人操人人人人人；并以一個(gè)實(shí)際自行高炮的激光測(cè)距系統(tǒng)為原型，建立了其回波仿真模型亚洲操在线观看，用SCTROF對(duì)此仿真模型進(jìn)行了研究91色色综合视频，結(jié)果表明，該理論是有效的男女XX00动态图视频gif。

In such a medium, the direction of the Poynting vector monochromatic plane wave is antiparallel to that of its phase velocity. Because of that, DNG displays some unusual electromagnetic properties such as backward-wave effect, negative refractive effect, perfect lens and a limit situation, zero index of refraction materials.

在這種材料中精品久久AV无码一区二区三区，單色均勻平面波的相速方向和坡印亭矢量方向是相反的，因此使雙負(fù)材料表現(xiàn)出一系列反常的電磁特性如：回波效應(yīng)麻豆一级毛片无码视频、負(fù)折射效應(yīng)来个能看的黄网、完美透鏡效應(yīng)和一種極限情況即零折射率材料等。

SAR image autofocus algorithm based on SAR echo is mainly studied in this dissertation.

本文重點(diǎn)討論了基于SAR回波數(shù)據(jù)的SAR圖像自聚焦算法欧美日韩国产精品。

The correspondence relationship between sea echo's SNR azimuthal distribution and the array's effective...

驗(yàn)證了回波信噪比隨方位角的分布同雷達(dá)天線陣有效視角的對(duì)應(yīng)關(guān)系

Backwash effects are said to operate where the economic growth in one region of an economy has economic adverse effects on the growth of other regions.

當(dāng)經(jīng)濟(jì)的某一地區(qū)的經(jīng)濟(jì)增長對(duì)另一地區(qū)的增長發(fā)生不利影響時(shí)99在精品，據(jù)說是回波效應(yīng)在起作用。

One is that the echo may be formed from those hailstones and graupels dropped...

本文舉兩個(gè)例子說明兩種指狀回波的結(jié)構(gòu)并討論其形成機(jī)制日韩一级特级视频。

Materials and Methods:236 pathology-confirmed breast lesions(155 malignanty,81 benignancy) and 221 disease-free contralateral breast tissues were examined using EPI-DWIb values=0,1000 s/mm~2TR/TE=8400ms/93.8ms; FOV=30×30cm;matrix=128×128;ASSET=2,slice thickness=4mm.DCE-MR imaging was also performed for accurate location of the lesion using VIBRANT sequence.The mean ADC values of malignant and benign lesions and the disease-flee contralateral breast tissues were calculated from the ADC map for each patient.One-way analysis of variance was applied to compare the mean ADCs of malignant lesions with benign lesions and disease-flee contralateral breast tissues.The threshold ADC value for malignant lesion was determined using a receiver operating characteristic(ROC curve analysis.Each lesion was classified into two major types:mass and non-mass lesion.The diagnostic performance of DWI was compared in breast mass and non-mass lesions.Results:155 malignant and 81 benign lesions were confirmed in 236 lesions.

材料與方法：搜集術(shù)前行乳腺M(fèi)R檢查并經(jīng)穿刺或手術(shù)病理證實(shí)的236例乳腺病變久久永久免费在线，以對(duì)側(cè)正常乳腺腺體作為正常對(duì)照，采用橫軸位的平面回波-擴(kuò)散加權(quán)成像序列欧美精选三区，TR=8400ms超黄色毛片久国产，TE=93.8ms，層厚=4mmgzdaqm.com，激勵(lì)次數(shù)=2：視野=30×30cm色污污网站，矩陣=128×128，ASSET=2欧美精品三区，b值=0和1000s/mm~2www.A黄色网站；參考動(dòng)態(tài)增強(qiáng)圖像準(zhǔn)確定位，測(cè)量病變區(qū)和對(duì)側(cè)正常乳腺腺體的ADC值看黄网站网址免费，應(yīng)用t檢驗(yàn)比較良欧洲美洲精品一区二区三区、惡性病變及正常腺體ADC值的差異，采用接收者工作特征曲線(receiver operating characteristic curve亚洲一区二区三区羽田爱，ROC)確定良惡性病變的ADC界值美国一级黄片的黄色美国的现在能放出来的；根據(jù)BI-RADS MRI將乳腺病變按照形態(tài)學(xué)表現(xiàn)分為腫塊性病變和非腫塊性病變兩組，比較ADC值在腫塊和非腫塊性病變中定性診斷的效能狠狠色视频一区二区。