国产日韩欧美一区二区三区三州_亚洲少妇熟女av_久久久久亚洲av国产精品_波多野结衣网站一区二区_亚洲欧美色片在线91_国产亚洲精品精品国产优播av_日本一区二区三区波多野结衣 _久久国产av不卡

?

基于蒙特卡羅方法的隨機(jī)粗糙表面仿真

2017-03-25 10:44于小寧
價(jià)值工程 2017年8期
關(guān)鍵詞:蒙特卡羅激光雷達(dá)

于小寧

摘要: 利用隨機(jī)粗糙面的相關(guān)函數(shù)及其表面譜密度函數(shù),結(jié)合蒙特卡羅方法建立隨機(jī)粗糙表面模型,并對粗糙表面統(tǒng)計(jì)參數(shù)均方根高度和相關(guān)長度與表面高度的關(guān)系進(jìn)行特性分析。通過仿真可知:高度均方根和相關(guān)長度的變化對表面高度有很大影響,當(dāng)均方根高度不同,相關(guān)長度相同時,表面高度隨均方根增大而增大;當(dāng)均方根高度相同時,相關(guān)長度越大,周期變?。煌ㄟ^改變某一方向上的相關(guān)長度,只改變本方向上的周期,而對其他方向不產(chǎn)生影響。

Abstract: Correlation function and surface spectral density function of random rough surface are combined with Monte Carlo method to establish the random rough surface model, and the relationship of RMS height and correlation length of the surface is studied. The simulation shows that: the change of correlation length and the RMS height have great effect on the surface height, when the correlation length is the same, the surface height increases with RMS height; when the RMS height is the same, the correlation length is larger but the cycle is smaller; through changing the correlation length in one direction, only change the direction of the cycle, but has no effect on the other direction.

關(guān)鍵詞: 激光雷達(dá);蒙特卡羅;隨機(jī)粗糙表面

Key words: lidar;Monte Carlo;random rough surface

中圖分類號:O348.11 文獻(xiàn)標(biāo)識碼:A 文章編號:1006-4311(2017)08-0226-03

3 結(jié)語

本文通過隨機(jī)粗糙面的相關(guān)函數(shù)和表面譜密度函數(shù),引用經(jīng)典的隨機(jī)粗糙面產(chǎn)生方法,結(jié)合蒙特卡羅方法實(shí)現(xiàn)隨機(jī)粗糙面模擬,通過對不同參數(shù)的設(shè)置,分析了各參數(shù)對隨機(jī)粗糙面的起伏高度的影響。

改變某一方向的相關(guān)長度,隨機(jī)粗糙面僅對該方向上的表面起伏產(chǎn)生影響,對其它方向沒有影響;改變其均方根高度,該隨機(jī)粗糙面的起伏高度產(chǎn)生影響;而同時改變隨機(jī)粗糙面的相關(guān)長度和均方根高度,其效果與前一致,且不相互影響;生成隨機(jī)粗糙面的次數(shù)越多所產(chǎn)生的粗糙面起伏越小。

隨機(jī)粗糙表面的蒙特卡羅模擬及其參數(shù)分析將為隨機(jī)粗糙面散射的數(shù)值計(jì)算奠定基礎(chǔ)。

參考文獻(xiàn):

[1]Haner D A, Menzies R T. Reflectance characteristics of reference materials used in lidar hard target calibration[J]. Applied optics, 1989, 28(5): 857-864.

[2]Yoshimori K, Itoh K, Ichioka Y. Statistical formulation for an inhomogeneous random water surface: a basis for optical remote sensing of oceans[J]. JOSA A, 1994, 11(2): 723-730.

[3]Sangston K J. Analytical aspects of ultrawideband sea scatter[C]//AeroSense'97. International Society for Optics and Photonics, 1997: 52-63.

[4]Stover J C. Optical scatter: Applications, measurement, and theory; Proceedings of the Meeting, San Diego, CA, July 24-26, 1991[C]//Optical Scatter: Applications, Measurement, and Theory. 1991, 1530.

[5]Hielscher A H, Eick A A, Mourant J R, et al. Biomedical diagnostic with diffusely backscattered linearly and circularly polarized light[C]//BiOS'97, Part of Photonics West. International Society for Optics and Photonics, 1997: 298-305.

[6]A.Guissard, C.Bauafys. Fully and nonuflly developed sea models of microwave remote Sensing applications[J]. Remote.Sens.Environ,1994(48):25-38.

[7]John R.Apel. An improved model of the ocean surface wave vector spectrum and its effct on radar backseatter[J].J.Geophys.Res,1994(8):269-291.

[8]Neumann G. On wind generated ocean waves with special reference to the Problem of wave forecasting. N.Y.U.,Coll.Of Eng.,Res.Div.,Dept.of Meteor. And Oeeanogr:136-137.

[9]郭立新,吳振森.二維導(dǎo)體粗糙面電磁散射的分形特征研究[J].物理學(xué)報(bào),2000,49(6):1064-1069.

[10]Guo Lixin,Jiao Licheng and Wu Zhensen. Electromagnetic Scattering from Two-Dimensional Rough Suraface Using the Kirchhoff Approximation,Chin. Phys.Lett,2001,18(1):214-216.

猜你喜歡
蒙特卡羅激光雷達(dá)
手持激光雷達(dá)應(yīng)用解決方案
高速公路激光雷達(dá)超限檢測系統(tǒng)
法雷奧第二代SCALA?激光雷達(dá)
基于HITRAN數(shù)據(jù)庫的大氣激光雷達(dá)信號仿真
基于激光雷達(dá)通信的地面特征識別技術(shù)
基于激光雷達(dá)的多旋翼無人機(jī)室內(nèi)定位與避障研究
基于蒙特卡羅模擬的過分相過電壓分析與抑制
蒙特卡羅有效增殖因子計(jì)算方法研究
探討蒙特卡羅方法在解微分方程邊值問題中的應(yīng)用
復(fù)合型種子源125I-103Pd劑量場分布的蒙特卡羅模擬與實(shí)驗(yàn)測定
鹤壁市| 安宁市| 巩义市| 镇巴县| 大理市| 华坪县| 资溪县| 宣武区| 永定县| 贡觉县| 柘荣县| 苍梧县| 固安县| 孟津县| 会泽县| 富锦市| 辽中县| 启东市| 顺昌县| 临沭县| 隆昌县| 郴州市| 繁昌县| 武宁县| 贵溪市| 三门县| 怀安县| 博乐市| 全州县| 启东市| 镇沅| 黔江区| 榆社县| 和田县| 虞城县| 巩留县| 星子县| 宜都市| 炎陵县| 宜章县| 祁阳县|