实变元与哑变元之间的对应 correspondence between actual and dummy argument
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The conclusions from this research include : ( 1 ) the real part mainly effects the delay time between two peaks of gpr signal , the larger the real part , the longer the delay time . ( 2 ) the imaginary part mainly affects the peak amplitude of gpr waveform except that from pavement surface , the higher the imaginary part , the lower the peak amplitude . ( 3 ) the neglect of imaginary part of dielectric will increase the analyzing error obviously when it is higher 分析了路面结构层材料介电常数实部和虚部对雷达电磁波反射信号的影响,并得出以下结论: ( 1 )介电常数的实部主要影响雷达反射波的时延,实部越大,时延越长; ( 2 )虚部主要影响除路表反射波幅之外的其它结构层界面的反射波波幅,虚部越大,反射波幅越小; ( 3 )当介质介电常数虚部较大时,忽略虚部将给分析结果带来明显的误差; 3
The results showed that the permittivity of matrix glass is very low . when the absorbing coating doped with 5wt % absorber , the permittivity increased rapidly and decreased with the increasing frequency . the reflectivity of the designed absorbing coating of 2 . 2mm thickness was mostly lower than - 10db at x band 基体玻璃介电常数的实部和虚部都比较低;掺杂5wt的纳米吸收剂以后,吸波涂层介电常数的实部和虚部均有大幅度的增加;介电常数随着频率的升高而有一定的下降,具有比较好的频散效应;由所得介电常数设计的2 . 2mm厚吸波涂层在x波段的反射率基本上都小于- 10db 。
Results showed that the samples of different heat treatment technologies of 38crmoal can be comparatively preferable distinguished by real spectrum and phase spectrum of fft . further research on real and image spectrum of fft discovered that using energy spectrum of real and image of fft to discriminate these samples is more compact and convenient 研究发现用ut信号fft的实部谱图结合相位谱图能够相对较好的区分38crmoal钢的不同热处理状态:对ut信号fft的实部和虚部谱图的进一步研究表明,用ut信号fft的实部和虚部能量谱来区分热处理状态更为简捷和方便。
For viscous shock waves c , by the spectral analysis we prove that in l2 ( r ) space the essential spectra and the eigenvalues ( except the simple zero eigenvalue ) of the linearized operator have negative real parts , thus we show that the viscous shock waves c is locally asymptotically exponentially stable in l2 ( r ) space 对粘性冲击波c利用类似方法,我们证得在l ~ 2 ( r )空间线性化算子的本质谱和除简单特征值零以外的特征值均具有负实部。于是,我们得到粘性冲击波c在l ~ 2 ( r )空间的局部渐近指数稳定。
Polydispersed a - fe nanoparticles have been obtained by using bi - amine terminated polyurethane flexible macromolecule as a surfactant , and on the basis of them , the epoxy - iron nanocomposite particles have been synthesized by in situ polymerization compositing technology . the real parts of both the permittivity and the permeability of the nanocomposite decrease firstly and then increse with increasing dose of surfactant . the composite particles have ideal comprehensive properties at the dosage of the sufactactant of 0 . 5 g , and its frequency dispersion exceeds that of traditional micrometer carbonyl iron powders 以双端氨基柔性大分子为表面活性剂制备了多分散的- fe粒子,并在此基础上以原位聚合复合法制备了环氧树脂-铁纳米复合粒子,发现随表面活性剂用量增加,复合粒子介电常数实部和磁导率先降低后增加,在表面活性剂用量为0 . 5g时复合粒子有较好的综合性能,频散特性优于传统微米羰基铁吸收剂。
2 ) tansformed the real part and imaginary part of interferogram to stationary wavelet domain , analyzed the pdf of signal and noise wavelet coefficients using pearson distribution system , then evaluated the wavelet coefficients of signal in stationary wavelet domain by maximum a posterior ( map ) criteria to reconstruct the interferogram 2 )将干涉图的实部和虚部分解到静态小波域,用pearson分布系作近似,分析了信号和噪声小波系数的概率密度函数,在静态小波域用map准则估计信号的小波系数用于干涉图的重建。
With heat treatment temperature increasing , the complex permittivity of w - type ferrite hollow microspheres decreased ; " firstly increased and then decreased , increased and there was an obvious resonance peak ; the complex permittivity ? of m - type ferrite hollow microspheres increased ; " increased , " was basically unchangeable 随热处理温度的升高, w型铁氧体空心微球的介电常数降低;磁导率实部先增加后减少,虚部增加并出现明显的共振峰; m型铁氧体空心微球的介电常数增加,磁导率实部增加,虚部变化不明显。
Based on the above , the paper analyses the echo model of sar moving target and the impact that caused by the velocity of moving target in sar image with imaging theory . then the paper gives the intensity image of the real part of the echo for both static and moving targets , and the paper gives their imaging picture generated by r - d algorithm as well 在此基础上,本文推导出了运动点目标的回波模型,并结合成像原理分析了运动目标速度对sar图像的影响,最后给出了静、动目标回波的实部灰度图及其r - d算法成像图,并进行了分析和比较。
The dielectric constants of silica - rich , alumina - rich , and stoichiometric mullite ceramics are 5 . 5 , 6 . 0 and 6 . 3 respectively . the dielectric constant of mullite - si / c / n composites is related with the sintering parameters . with the increase of the sintering temperature and dwelling time , the " " and tg of mullite - si / c / n composites are decreased , this phenomenon is related with the change of the microstructure and phase composition of nano si / c / n powders 莫来石- si c n复合材料的介电常数与热压烧结工艺有很大的关系,随热压烧结温度( 1450 1600之间)的升高,烧结时间(烧结温度为1550 )的增长,莫来石- si c n复合材料的介电常数实部、虚部及介电损耗角正切均明显下降,这与吸收剂的性质随温度和时间的变化有关。
By choosing some appropriate exponential weight functions we prove that the essential spectra and the eigenvalues ( except the simple zero eigenvalue ) have negative real parts , thus we get the locally asymptotically exponential stability of travelling waves ( al ) and ( a2 ) in some weighted spaces 通过选用合适的权函数,我们证得在加权空间线性化算子的本质谱和除简单特征值零以外的特征值均具有负实部。因此,我们得到行波( a1 ) , ( a2 )在加权的l ~ 2 ( r )空间的局部渐近指数稳定。