The types of Subei basin, the structural features of main abundant hydrocarbons depressions, the features and genetic mechanisms of structural trap assemblages and the characters of oil-gas distribution are chiefly studied in this work with applying comparative structural geology, analytic structural geology and Earth dynamics, the control of the structure on oil-gas is generalized, and then the exploration targets were found based on these analysis.

綜合運用比較構(gòu)造學(xué)、解析構(gòu)造學(xué)和地球動力學(xué)等方法免费成年人视频，重點研究了蘇北盆地成因類型、主要富烴凹陷構(gòu)造特征、構(gòu)造圈閉組合特征和成因超碰在线亚洲黄色、油氣分布特征，總結(jié)了構(gòu)造對油氣分布的控制作用一级a爱片在线观看视频免费，在此基礎(chǔ)上尋找有利的勘探方向国产精品床在线观看爽爽。

It is convenient to characterize the magnitude of this asymmetry using Fourier decomposition of the azimuthal distribution.

定義各向異性流為粒子相對于"反應(yīng)平面"分布的不對稱性，通常用方位角分布的付立葉變換來描述這一不對稱性www.uuu26com。

Grain-size distribution may be characterized in part by skewness of the distribution.

粒徑的分布具有偏態(tài)分布的特點国产一级精品A片免费观看。

The results above showed:(1) The cultivars of large-flowered chrysanthemum are widely distributed in Beijing area with plentiful floral types and floral colors;(2) The cultivars with the rare types and colors are urgent for protection;(3) Most of the quantitative characters obeys to the normal distribution,some important traits agreed with skewed distribution.The probability grading can assist quantitative character in establishing new grading standards;(4) Most of qualitative characters is asymmetrical in cultivars,which might be caused by unbalanced differentiation of characters or linkages coming from emphasis characters selection;(5) The floral characters are relatively stable and have comparably large influence on classification,the characters of stipule also have a certain degree of stability and can act as an reasonable supplement for cultivars classification,but the foliar characters have worse stability and can only be recognized as lower level criterion.(6) The genetic relationship among the Flat-petaled group,the Quilled-petal group and the Spoon-petaled group are closest,which followed by the Filiform-petal group because of long-term selection pressure for the specialization of the petal tip loved by most people.The Anemone-petal group has further genetic relationship with these four groups.(7) ISSR molecular marker detection indicates that the proportion of polymorphic loci of lardge-flowered chrysanthemum is higher,in which the Flat-petaled group has the highest genetic diversity level.

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Many new detection techniques are proposed, that include: To overcome the faults of cross-terms and short unambiguity range for the common Wigner-Ville Distribution , short-time Fourier transform and Gabor transform are applied to SAR moving target detection. To improve the detection performance of WVD in noise environment, a new technique based on the Cross-WVD is proposed. The application of fractional Fourier transform to chirp signal detection is analyzed and extended to SAR moving target detection. To eliminate the restriction of chirp-Fourier transform, a new modified definition is proposed and applied to SAR moving target detection. To detect multiple moving targets whose scattering intensities are different heavily, the CLEAN technique is combined with the above techniques and the ideal detection performance is achieved. At last, the whole dissertation is concluded.

具體的研究成果如下：針對常用的Wigner-Ville分布在多目標(biāo)情況下存在交叉項，并且多普勒不模糊范圍小的缺點簧网站在线观看网站永久，提出將短時Fourier變換和Gabor變換應(yīng)用于SAR運動目標(biāo)檢測欧美黑大粗硬，分析了其優(yōu)勢所在；為進一步提高Wigner-Ville分布低信噪比條件下的信號檢測能力三级A片想干就干，提出基于互Wigner-Ville分布的運動目標(biāo)檢測方法扒开美女双腿桶出白浆；分析了分數(shù)階Fourier變換在線性調(diào)頻信號檢測中的應(yīng)用，提出基于分數(shù)階Fourier變換的運動目標(biāo)檢測算法五级黄色毛片；對離散Chirp-Fourier變換的定義進行了修正韩日妇女打一炮，提出修正的離散Chirp-Fourier變換，克服了限制其應(yīng)用的約束條件美女a片网站，并用于SAR運動目標(biāo)檢測當(dāng)中一级A片破外女；強度相差較大的多運動目標(biāo)檢測歷來是機載SAR技術(shù)的一個重點和難點，我們將CLEAN思想融入上述多種算法當(dāng)中日日精品视频在观线看网站，良好地解決了該問題色爽女人免费网站。

After comparing nonlinear simulation with linear, the results indicate that: Weak nonlinearity has definite and apparent influence on the distribution of acoustic fields and focused gain of array, which cause the distribution of waveform is closer to the array and the focused gain deteriorate ; the strong nonlinearity have a strong waveform aberration, because the other waves of non-fundamental frequency appear . No evident distinction is found in the effects between the oblique propagation and the vertical propagation, though less focused gain and influence caused by strong nonlinear produced by the acoustic diffraction which results in more attenuation in terms of oblique propagation.

將線性條件下的模擬結(jié)果與非線性條件下的模擬結(jié)果進行比較發(fā)現(xiàn)：弱非線性會對聲場的分布和陣列聚焦增益產(chǎn)生一定的影響，使得聲場分布波形比線性條件下的更加靠近陣列，聚焦效果變差狼友视频网址最新版；強非線性會使波形發(fā)生更嚴重畸變欧美黃片AAAAAA色，這是由于產(chǎn)生了基頻以外的其他頻率聲波引起的；非線性對斜向傳播時聲場分布的影響與垂直傳播時的影響效果基本相同欧美一级电，但由于斜向輻射時的聲波衍射造成的衰減要大于垂直輻射時的一级黄电影院，因此聚焦增益和強非線性的影響都將小于垂直輻射時的情況。

5Ns. The peak position of N band emission as well as the distinct emission region slightly moves towards the open end of the cylindrical cavity, and this does not happen to O band emission. Radiation transport efficiency of 6% is obtained for the φ400×1200um cylindrical cavity heated by x-ray source with radiation temperature of 118 eV.

從時間分辨的X光強度軸向空間分布來看强奷漂亮的女教师2中文字幕，在較長時間（約1～1.5ns）內(nèi)免费乱婬伦漫画，O帶X光在整個觀測縫對應(yīng)的軸向范圍之內(nèi)均有較大的輻射強度，在X光強度空間分布的變化過程中国产污视频，其強度峰值的空間位置基本不變国产精品福利久久；而對N帶X光，則只在較短時間（約0.5ns）內(nèi)免费看18禁止观看啪啪网站，在整個觀測縫對應(yīng)的軸向范圍之內(nèi)可觀測到X光輻射一级片无遮挡JJ抽插视频，但只在靠近輸運源約300μm的范圍內(nèi)有較強發(fā)射，在柱腔末端600～700μm范圍之內(nèi)的輻射則很弱国产美孰女乱又伦Av，N帶X光輻射軸向空間分布曲線的峰值位置在朝柱腔末端的方向移動国产小呦，移動量大約為130～250μm。

In this paper, based on a pill-box window model with a conical-shaped alumina ceramic and Ansoft HFSS software, the relation of VSWR with various electrical parameters in the window is simulated; the effects of variations of the output window structure on electrical field intensity, microwave power flow and quantity of heat are analyzed; the electrical characteristics of frequency bandwidth, power capability and heat dissipation for the pill-box window with conical-shaped or disk alumina ceramic are discussed, which shows that, with a rational structure of the window with conical-shaped alumina ceramic, the output capability of microwave peak and average power may greatly be increased, the secondary electron emission may effectively be suppressed, and heat dissipation may become more uniform and be easier for cooling.

本文在前人工作的基礎(chǔ)上操美女,黄免费视频，基于圓錐形陶瓷盒形輸出窗模型，采用Ansoft HFSS三維計算軟件的優(yōu)化模擬欧美三级日韩精选，對該輸出窗模型的駐波頻率特性與各種結(jié)構(gòu)參量的關(guān)系進行了優(yōu)化模擬AⅤ资源网影音先锋，分析了該輸出窗片結(jié)構(gòu)變化對其表面的電場分布，功率流分布国产欧美日韩另类VA在线、熱量分布的影響第一页中文字幕，得出最優(yōu)模型參數(shù)。并且探討了陶瓷窗片的形狀和幾何結(jié)構(gòu)對改善輸出窗的頻帶特性久久深夜福利亚洲网站、提高峰值功率和平均功率自拍偷拍欧美精品、抑制二次電子倍增方面的作用。

An assumed Gaussian tail is addedonto the HO distribution. The calculations for〓 of the protron-rich isotones 〓〓 and 〓 and for 〓 the neutron-rich isotopes 〓were finished by theGlauber Model along with the modified density distrution. The calculated resultsshow that d values of these nuclei along with the modified density distribution arelower than the calculated ones along with the only HO density distribution.

為減小Glauber模型計算的反應(yīng)截面與實驗值的差別伊人免费视频，本論文還對Glauber模型的輸入密度形式進行了修改影音先锋色噜噜狠狠，在原單-HO分布基礎(chǔ)上加一個高斯分布的尾巴，并對豐質(zhì)子的同中子素核〓及〓與〓靶以及〓和豐中子的C同位素核〓與〓靶的反應(yīng)截面重新進行了計算操逼北京老妇，結(jié)果顯示在中能區(qū)的計算值比原來單一密度分布的計算結(jié)構(gòu)有明顯改善激情变态另类三级无限。

Based on this, aim at the disadvantage on Wigner Distribution and Fractional Fourier Transform that can't restrain noise interference effectively when be used to detect Linear Frequency Modulated signals interfered by heavy noises, we proposed a improved WD. Simulation results show that this method can restrain noise interference effectively and improve the ability of LFM signals detection. On the other hand, in multi-component cases, WD suffers from the cross-terms, which may impair some of the auto-terms. In order to separate original multi-component signals into components and reconstruct them separately, we can use the method of optimal filtering in fractional Fourier domain. But this method also has a problem that if signals have aliasing in the fractional Fourier optimal domain as well, the reconstructed signals will be distorted. In this thesis, a novel method of quasi Fourier transform is proposed in order to solve the problem of multi-component signal reconstruction, and have good results.

在此基礎(chǔ)上，針對Wigner分布和分數(shù)維傅里葉變換在處理高噪聲背景下線性調(diào)頻信號檢測的問題時存在不能有效抑制噪聲干擾的缺點黄色不卡福利，提出了改進Wigner分布的辦法淫荡视频免费网站，該方法能夠抑制噪聲，提高信號的檢測能力；針對Wigner分布在處理多分量非線性調(diào)頻信號時存在干擾項的缺點国产精选插逼视频，以及分數(shù)域最優(yōu)濾波方法在處理多分量非線性調(diào)頻信號分離重構(gòu)問題時存在的局限性亚洲中文刮吗一本到午夜，該局限性表現(xiàn)為在對最優(yōu)分數(shù)域上也有信號分量重疊的情況進行處理時重構(gòu)信號發(fā)生畸變，提出了新穎的類傅里葉變換的方法欧美性爱电影免费观看，該方法對在最優(yōu)分數(shù)域上也有信號分量重疊的情況也能處理欧美乱人伦高清视频中文字幕，得到的重構(gòu)信號失真很小。