查询词典 residual spectrum

The spectrum analysis of periodic signals has some difference with the spectrum analysis of nonperiodic signals.The DFT result of nonperiodic signals indicates the spectrum density on frequency Ω,and is continuous.

一般信号的DFT结果表示该信号在频率Ω处的频谱密度，它是一个连续信号，周期信号的DFT仅表示它的基波及各次谐波的幅值，是一个离散信号。

Upon this we measure the conbination energy spectrum and momentum spectrum of valence orbital electron of C2H6. furthmore we get the isolation spectrum of valence orbital electron of N2 and C3H8 for the first time.

在此基础上，测量得到乙烷分子(C_2H_6)价轨道电子的结合能谱和动量谱，并用EMS方法测量得到氮分子(N_2)和丙烷分子(C_3H_8)价轨道电子的电离能谱。

The Ultraviolet-visible spectrum and FTIR spectra of wine processed by UHP was studied, the UV spectrum of wine was affected by different pressures and time, 300MPa was a point of UV spectrum inflection.

通过对超高压处理后的新鲜葡萄酒的紫外可见吸收光谱分析，结果表明：处理压力和处理时间对紫外可见吸收光谱均有一定的影响，300MPa是葡萄酒紫外可见吸收光谱曲线变化的处理拐点。

The frequency spectrum of the electric field, produced by an electric current dipole on the surface of the uniform conductive and polarizable earth, is transformed into time spectrum, with or without some random error added, and the time spectrum is then inversely transformed into the frequency domain.

基于层状导电和可极化大地表面，电偶源电场的时间谱在无随机干扰和有随机干扰时，进行频谱转换的计算结果，证明了时—频转换的误差传递问题严重。

Simulation results show that the method can detect the period of DS spread spectrum signal and produce the primitive polynomial of the spread spectrum code sequence under the conditions that the length of receiving signal is small than one spread spectrum period.

仿真结果表明该方法能够在接收信号长度小于一个扩频码周期的情况下检测出直接序列扩频信号的扩频码周期和产生扩频码序列的本原多项式。

On basis of the color reactions of 4-(2-pyridine azo)-resorcin with copper, zinc and manganese, but the absorption spectrum of complex compounds which they created overlapped with each other seriously. Dealing with the spectrum data with the method of multivariate calibrations of chemometrics, we can simultaneously analyze the measured spectrum of mixture.

基于这三种金属离子均能和4-（2-吡啶偶氮）－间苯二酚发生显色反应，但所生成络合物的吸收光谱重叠比较严重，采用化学计量学的多元校正方法，解析了Cu(上标 2+)、Zn(上标 2+)、Mn(上标 2+)混合物的测量光谱。

The scarceness of wireless spectrum hampers the sustainable development of wireless communication services. Recently, the wireless communication community has realized that the static spectrum allocation method is the main cause of the shortage of wireless spectrum.

中文摘要无线频谱的紧缺是限制无线通信与服务应用持续发展的瓶颈，近年来，无线通信业界普遍认识到，静态的频谱分配方式是造成当前频谱资源日趋缺乏的一个主要原因。

According to the theory of Sagnac FourierTransform spectrometer, the method which we used to reconstruct the spectrum correctly from the captured interferogram was developed. With the steps of trend term correction, apodisation, phase correction and conjugate symmetrization applied to the interferogram captured and then reconstructed it, the error was avoid.The experiment to reconstruct the spectrum of monochromatic light source such as Helium lamp used in the developed prototype was carried out. The results agree with the nominal spectrum distibutions of the sources with the accuracy of 4nm.

介绍了Sagnac型干涉成像光谱仪基本原理，针对上述问题得到一套对采集得到的干涉图进行光谱重构的方法，通过对所采集干涉图进行消趋势项、切趾、相位校正、共轭对称化等步骤的处理，再进行重构，即可有效避免直接重构所带来的误差，使用所研制的原理样机对氦灯等单色光源进行光谱曲线重构实验，得到的光谱强度分布曲线与标称曲线基本吻合，光谱复原精度达到了4nm，具有较好的重构效果。

Study on transmission spectrum of ZnO films;2. Study of Measuring Grating Parameters with Transmission Spectrum and Design of Perfect Anti-reflection Coating;3. Kinetics of the oxidation process of the copper films in the thickness range of 16～22 nm at 140 ℃ was studied by using transmission spectrum and sheet resistance methods.

采用方块电阻和透射光谱两种方法为表征手段，测量16～22nm范围内不同厚度Cu薄膜在140℃下完全氧化所需要的时间，得到了Cu薄膜氧化反应的动力学曲线，并利用X射线衍射分析了氧化产物的晶相结构和成分。

Research on spectrum line refractive index of triangular prism with spectrometer measuring;2. The amplitude spectrum line and the amplitude spectrum function are proposed for the airborne particle scattering light signal,and their properties are studied in probability space.

针对粒度仪标定的准确度，在概率空间基础上，提出了尘埃粒子散射光信号幅度概率谱线和散射光信号幅度概率谱函数的概念，并对谱线在概率空间下的性质进行了研究。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。