波谱

The following are the major work in this thesis which has been studied and still needs to be studied further in the future: 1 An improved adjoint variational method is developed, thus it can be applied to the LAGFD-WAM Wave Numerical Model for data assimilation; 2 A linear evolution equation of spectral perturbation is derived in order to analyze its increasing or decreasing mechanism.

本论文主要完成了以下几个方面的研究： 1）建立了推广形式的共轭变分同化方法，使之能够应用于LAGFD-WAM海浪数值模式； 2）导出了扰动谱线性演化方程，分析了扰动谱增长、衰减机制，考察了涌浪情况下扰动谱的持续时效问题及风浪情况下扰动的演变过程； 3）利用波谱共轭方程初步分析了同化模型中距离泛函的敏感性及敏感区域空间分布； 4）将推广的共轭变分方法应用于海浪谱能量平衡方程，建立了连续形式的海浪同化模型，特别是严格导出了风输入、破碎、底摩擦、波波非线性相互作用和波流相互作用各源函数的共轭源函数表示式； 5）分别进行了波谱层次上和有效波高层次上的同化试验，并对数值结果进行了分析。

The simulated climate fields were decomposed with the spherical harmonics function and the corresponding spectral analysis was made,thus the spherical harmonics feature of global 500 hPa height and the sea level pressure in several truncations was investigated and the field changes on doubling CO2 were analyzed too.

对模拟的气候场用球谐函数作波谱分析，得到了全球500hPa高度和海平面气压在不同截断时的波谱特征以及由CO2倍增(2×CO2)引起的流场变化。

The main study of this dissertation is shown as follows.1.Two new amphiphilic steroid derivatives(N-cholesteryl succinyl glucosamine, CSG and N-deoxycholyl glucosamine,DCG) were designed and synthesized.Their chemical structures have been confirmed by means of Fourier Transform Infrared Spectrometry,Nuclear Magnetic Resonance Spectrometry and Mass Spectrometry.

设计、合成了新型的两亲性甾族衍生物—N-胆固醇琥珀酰基氨基葡萄糖(N-cholesteryl succinyl glucosamine，CSG)和N-脱氧胆酰基氨基葡萄糖(N-deoxycholyl glucosamine，DCG)，并采用傅立叶红外波谱仪(Fourier TransformInfrared Spectrometry，FT-IR)、核磁共振波谱仪(Nuclear Magnetic ResonanceSpectrometry，NMR)和质谱等分析仪器对原料、中间产物和最终产物的化学结构进行表征。

Their chemical structures were characterizd on the basis of spectral and chemical evidences to be: Sarracenin (1), 2-methyl-5-hydroxy-7-O-ethyl caffeate chromome (2), Naringenin(3), 2-methyl-5, 7-dihydroxychromome (4), 2-methyl-6-hydroxyl-cinnamic acid methyl ester (5), eriodictyol (6), quercetin (7), Naringenin-7-O-β-D-glucoside( 8 ), eriodictyol-7-O-α-D-glucoside (9), quercetin-3-O-β-D-glucoside(10). In addition, one compound was abtained from the n-butanol frationk, which was finally identified as Morrosiside(11) by spectral and chemical evidences.

以波谱数据及其理化性质鉴定为：Sarracenin(1)，2-甲基-5-羟基-7-O-咖啡酸乙酯色原酮(2)，柚皮素(3)，2-甲基-5，7-二羟基色原酮(4)，2-甲基-6-羟基苯丙烯酸甲酯(5)，圣草酚(6)，槲皮素(7)，柚皮素-7-O-β-D-葡萄糖苷(Naringenin-7-O-β-D-glucoside)(8)，圣草酚-7-O-α-D-葡萄糖苷(eriodictyol-7-O-α-D-glucoside)(9)，槲皮素-3-O-β-D-葡萄糖苷(quercetin--3-O-β-D-glucoside)(10)；另外从正丁醇萃取部位分离得到1个化合物，以波谱数据和文献对照鉴定为：Morroniside(11)。

Our study focused upon the precentral gyrus to determine whether any signal changes could be detected in ALS patients; and to determine whether riluzole can reverse corticomotoneuron damage in patients with ALS.

质子磁共振波谱是一种可以无创性定量测定在体脑内生化物质的方法，在对ALS病人双侧大脑中央前回进行质子波谱分析后显示：（1）NAA/Cr （N-乙酰门冬氨酸/肌酸）比值在ALS病人上显著降低，P.01。

Key Words Proton magnetic resonance spectroscopy, Precentral gyrus, Amyotrophic lateral sclerosis

磁共振波谱分析：采用Siemens Sonata 1.5T 磁共振成像、波谱分析一体化系统。

And NMF has never been applied to resolve mixed chemical signal. It must be modified according to the characteristics of chemical signals, such as smoothness of spectra, unimodality of chromatograms, sparseness of mass spectra, etc..

作者根据化学波谱的基本特征（化学波谱的平滑性、色谱的单峰性以及质谱的稀疏性）对NMF算法进行了改进，缩小了其多解范围。

The paper make an intensive study of the key link in spinning mill ── the quality test and production control using capacity evenness tester which is presented by USTER TESTER, covering the analysis of relevant test results and practical application for the evenness test,the spectrogram types,the calculation of the weave length showed on a spectrogram and caused by mechanical faults,the determination and control of the evenness indexes,as well as the requirement and the plan for spinning quality control.

摘 要：探讨了纺纱质量测控的中心环节──使用以USTER TESTER为代表的电容式条干均匀度仪器测定条干均匀度时的结果分析及实际应用。其中涉及电容式条干均匀度仪的测试结果分析及应用、波谱图的分析及应用、设备的机械问题在波谱图上所造成的不匀波长的计算、纺纱条干均匀度指标及控制、纺纱质量控制方案及要求等几个方面的内容。

Thus, we presented a new frequency-selective method for MRS quantification, which estimated the nonlinear and linear parameters of the selected components baaed on total least squares and forward-backward APES respectively.

为此本文提出了一种基于频率选择的波谱信号量化方法，该方法通过全局最小乘方法来估计波谱信号的非线性参数，又结合前向和后向的APES方法来估计其线性参数。

This approach followed a novel idea: the main-lobe clutter spectrum is regular for the deviation azimuth of clutter is corresponding to its Doppler frequency, while the returns of moving targets violate this regularity, so it\'s reasonable to use the azimuth error in each Doppler channel as a detector of ground moving target.

该方法以一种新的思路，利用单脉冲雷达和波束主杂波谱区固定回波的偏角与多普勒频率相对应的规律性，将动目标回波视为对这种规律性的干扰，从而利用单脉冲测角误差在主杂波谱区进行地面极低速动目标检测。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。