查询词典 spectrum analysis

Methods Deproteinized bones were made through a series of physicochemical treatment from pig ribs and were analyzed with histology,scanning electron microscopy,infrared spectrum,X-ray diffraction analysis,X-ray energy scattering analysis,microdose Kjeldahl determination and mechanical analysis.

方法对猪肋骨进行一系列理化处理，制成脱蛋白骨，并对其进行组织学、扫描电镜、红外光谱、X射线衍射分析，X射线能量散射分析、微量凯氏定氮及力学性能测定。

Methods On the basis of bioisosterism principles and by the method of substructure link, we modified the parent structure of 1, 3, 4-thiodiazole and synthesized a new kind of thiadiazole Schiff base. The structure of the new thiadiazole Schiff base was confirmed by infrared spectrum, nuclear magnetic resonance hydrogen spectrum (1HNMR) and elemental analysis.

利用生物等排原理和亚结构连接法，对噻二唑母体进行修饰，设计并合成了1个新的噻二唑席夫碱，目标化合物的结构经红外光谱、核磁共振氢谱和元素分析加以确证。

Due to the complexity of the cell jitter, the NonSynchronous Tining Recovery methods are currently not mature With the emphasis being given to the Class A CBR traffic, this paper analyzes the performance of the queueing delay and cell jitter at the source node and intermediate nodes, and discusses the Source Timing Recovery at the destination node in ATM networks Firstly, this paper presents a description of the cell jitter of CBR traffic, and gives the definitions of two kinds of cell jitter regarding the Source Timing Recovery for CBR traffic Then, by using exact mathematical models and analysis methods, this paper analyzes the impact of the factors, such as the capacity of the queueing buffer, the randomness, the deterministic nature and the correlation in cell arrivals of the background traffic sources, on the queueing delay and cell jitter performance of the CBR traffic through Statistical Multiplexitng To obtain an insight into the power spectral distribution and look for better schemes for the depression and filtering of the cell jitter, within the analyses we succeed deriving the power spectrum of the cell jitter for CBR traffic Hence, not only the power spectral distribution of the cell jitter can in the frequency domain be qualitatively understood, but also can the rms (root-meansquare) value of the cell jitter be quantitatively obtained so as to more accurately measure the amplitude of the jitter In the end-to-end performance analysis of the queueing delay and cell jitter, we propose a kind of quasi-periodic cell stream model to characterize the jittered CBR traffic, and present an initial queueing analysis of the CBR traffic following such a model at a generic intermediate node Additionally, we briefly discuss the buildout/playout and Source Timing Recovery functions of the destination node Finally, regarding the Source Timing Recovery of CBR traffic, this paper systematically discusses several important principles of the cell jitter filtering and depression reported in the literature, introduces several implementation schemes of the Source Timing Recovery e.

由于信元抖动的复杂性，非同步定时恢复方法目前还很不成熟。本文针对A类CBR业务流在ATM网络源节点和中间节点的排队时延和信元抖动性能，以及在目的节点的源定时恢复问题作了较为全面的研究。首先，文中描述了CBR业务流的信元抖动，并具体地给出了两种与CBR业务源定时恢复有关的信元抖动的定义。然后，采用了精确的数学模型和分析方法，有针对性地分析了业务背景中信元到达的纯随机性、确定性和相关性以及排队缓存器容量等因素对CBR业务流经过统计复用后的排队时延和信元抖动性能的影响。为了了解信元抖动的功率频谱分布和寻求更好的抑制和滤除抖动的方法，在性能分析中，我们成功地完成了CBR业务流信元抖动的功率谱分析，使得不但可以从频域定性地认识信元抖动的能量分布特性，而且还可以定量地求出信元抖动的均方根值(rms：root-mean-square)，以更为准确地衡量抖动的大小。在CBR业务流的多节点端-端排队时延和信元抖动性能分析中，我们提出了一种准周期性(quasi-periodic)信元流模型来描述感染了信元抖动的CBR业务流，并基于这一模型进行了CBR业务流中间节点的初步排队分析。

The motion dynamics and echo models of the precessing warhead in single frequency are set up. Based on a quantitative analysis on echo spectrum and micro-Doppler modulation of precessing cone, a precession parameter estimation method by echo correlation and spectrum width is proposed. The experiments on data by simulation and darkroom measurement verify the method.

建立了单频信号下雷达观测弹头的进动模型和回波模型，通过对进动弹头回波频谱与微多普勒调制特性的定量分析，提出了利用回波相关方法和频谱展宽估计进动参数的方法，并利用暗室测量数据对该方法的性能进行了实验验证。

Secondly, the paper has carried on the analysis to the millimeter wave blasting fuse near field target characteristic, and has produced a RCS measuring technique. The analysis is that non- atmosphere window triangle wave modulation millimeter wave blasting fuse slip frequency spectrum, which has completed under the triangle wave modulation slip frequency signal time domain and the frequency range analysis.

随后对毫米波引信近场目标特性进行了分析，并给出了一种RCS的测量方法，并系统分析了非大气窗口三角波调制毫米波引信的差频频谱，完成了三角波调制下的差频信号时域和频域分析。

But there is serious MAI problems in traditional CDMA communication system,and this papers will analysis and research the multiple access technology,at the same time, focus on the analysis of direct sequence spread spectrum CDMA interference suppression technology and on the basis of this analysis, the multi-user detection method based on independent component will be discussed.

但传统CDMA通信系统内存在严重的多址干扰问题，论文在对各种多址技术进行分析的同时，着重对直接序列扩频码分多址干扰抑制技术进行了分析，并在此基础上对基于独立分量分析的盲多用户检测方法进行了的探讨。

The composition and fluorescence property of 2,2,2-amine tri acetyl-benzylamine with ligand of tripod type were studied through Molar conductivity, infrared spectrum, NMR, elemental analysis, thermal analysis, and UTA-TG analysis.

方法］通过摩尔电导率、红外光谱、核磁共振波谱、元素分析、差热－热重分析，研究三脚架型配体2，2，2-胺三乙酰－苄胺及其稀土配合物的组成、荧光性质。

In this dissertation, a kind of MPc and five metallonaphthalocyanine were synthesized. The molecular structure of the compounds were characterized by means of the elemental analysis, the infrared spectrum and the nuclear magnetic resonance spectrum, which proved that the topical compounds were successfully synthesized.

本文设计并合成了五种叔丁基取代的金属萘酞菁化合物和一种金属酞菁化合物，通过元素分析、红外光谱分析、核磁共振氢谱分析等对目标产物进行了结构表征，验证了所合成化合物的结构。

Assumed that the coherence of the wind load in vertical is the same to the wind speed, the auto power spectrum and cross power spectrum of the wind load on the tower is formulated. Futhermore, the analysis shows that the contribution of the turbulence is about equal to the vortex shedding for the cross-wind motivation.

基于风荷载竖向相干性与风速相干性一致的假设，得到输电塔不同高度的风荷载自谱与互谱，并分析输电塔横风向激励的组成，识别出紊流激励部分与旋涡脱落激励部分约各占一半。

In order to study the spilt spectrum of Zeeman effect experiment, the method for the spilt spectrum line of Hg(546. 1 nm) in magnetic field is analyzed based on quantum theory analysis and CCD image disposal.

为了研究塞曼效应的谱线分裂情况，用量子理论和CCD图像相结合的方法分析了Hg(546.1 nm)谱线在外磁场中的分裂。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。