查询词典 spectrum line

The analysis of simulation result indicates that the CDMA system has much more superior performance on noise-immune; the continuous processing in the part of signal modulation can not improve the efficiency of spectrum in CDMA system; under the situation , making sure that the proximity of the reliability of information transmission to the unsmoothed system, the power of the transmission can decline to 90.5% of the unsmoothed system, the bandwidth of -50dB will decline to almost one half of the unsmoothed system in spread spectrum and dispread spectrum by using continuous WALSH codes.

仿真及分析结果表明：CDMA系统具有更优越的抗噪声性能；信息调制部分的平滑化处理在CDMA系统中不会改善频谱的利用效率；运用平滑化WALSH码进行扩频和解扩时，在保证信息传输可靠性与非平滑化系统接近的情况下，能够将发射功率降低到非平滑化系统的90.5%，-50dB带宽减小到非平滑化系统的一半左右，这有利于降低对临近频段的干扰，提高频谱的利用效率。

On the base of fatigue loading spectrum achievements, combining the characteristics of large-span grid structure with hanging cranes and the using-requirement on fatigue loading spectrum of grid structure with hanging cranes, this paper has firstly put forward the theoretic method for constructing fatigue loading spectrum of grid structure with hanging cranes, organized the relevantprogram--GJFLS. and elementally established the program loadingspectrum .

在继承疲劳载荷谱已有成果的基础上，本文结合网架设置悬挂吊车的特点以及网架疲劳载荷谱的使用要求，首次提出了网架疲劳载荷谱编制的理论方法，并编制了相应的程序，初步建立了网架程序载荷谱。

The absorption spectrum,inductively coupled plasma atomic emission spectrum and fluorescence spectrum of the crystals were measured.

测试了晶体的吸收光谱、电感耦合等离子体原子发射光谱和荧光光谱。

A technology of VAD, in practice, plays an essential role in noise spectrum estimator. The VAD scheme is frequently employed into noise spectrum estimator as an indicator of updating noise spectrum.

事实上，语音侦测技术使也在噪音估测器中扮演非常重要的角色；一般都采用语音侦测系统的技术作为判断何时追踪噪音频谱变动的指示器。

Dependent on the past research in seaice, in Bohai Sea, in 2003-2004 winter and 2004-2005 winter with level ice for the target we open the field experiments to study the essential spectrum characteristic of ice, removing by testing means various nonessential factor for sea water in the fixing big ice plate, building up 170 growth conditions to look like under the natural condition, the growth expect different sample series; in 2004-2005 winter and 2005-2006 winter continue two pass to break thorough Bohai Sea in the ship to collect 59 sea ice sample that have the non-essential ice factors in winter, open the influence research that the field hangs sand to contribute to the spectrum of the ice body; in 2005-2006 winter, fast ice to open the field spectrum curves to coast and analytical research.

总结前人的研究成果和开展一系列的室内实验，在渤海—北半球纬度最低的结冰海域，于2003/2004、2004/2005 连续两个冬季以单层平整冰为目标开展实验研究一年生海冰的冰体本质光谱特征，在固定冰盘上以实验手段摒除各种光谱干扰因素，在自然条件下建立170 个生长条件近似、生长期不同的样本系列；于 2004/2005、2005/2006 连续两个冬季通过破冰船深入渤海采集59 个具有非冰体本质因素的海冰样本，开展悬沙对冰体反射光谱的影响研究；于2005/2006 冬季，针对沿岸固定冰开展光谱测量和分析研究。

Based on the histogram multifractal spectrum estimation, a kernel density estimation of multifractal spectrum is suggested, and moreover a edge dection method by multifractal spectrum is present, simulation results show that image edges detecting through this method have good global and local character, and are more finner.

在多重分形频谱直方图估计方法的基础上，提出了一种基于核估计的多重分形频谱估计方法，同时提出了一种基于多重分形频谱分析的图象边缘检测方法，利用该方法所检测出的图象边缘具有良好的全局性和局部性，也就是说它能够检测出比较精细的图象边缘； 4。

After acquiring the ultraviolet absorption spectrum and its first order derivative spectrum distributions of Avermectin B1 by using UV-2401 PC spectrophotometer and spectrum-measuring system,we found that coordinates of the peak A252.2 and the valley A256.8 are not disturbed by the different forms of preparations.

用UV-2401 PC紫外分光光度计及光谱工作站，以1 nm狭缝宽度，2 nm Δλ间隔，在190～400 nm波长范围内快速扫描采集阿维菌素B1紫外吸收光谱，拟合一阶导数光谱发现峰顶A252.2，和峰谷A256.8在波长坐标上的位置不受不同制剂干扰。

Finally, the calculation process of CGR graphic's multi-fractal analysis was studied. the scope of choice of the weight factor and the scale invariance range were discussed, the weight factor can be chosen as ? 15≤q≤50; multi-fractal spectrum and generalized dimension of different sequence were calculated, multi-fractal spectrum and generalized dimension in different scales of different sequences were compared, it was found that multi-fractal spectrum and generalized dimension can show different levels of fractal characteristics of CGR graphics of DNA sequence, which can distinguish more complex structure of sequences.

最后，研究了DNA序列CGR图形的多重分形的计算过程，讨论了权重因子及满足标度不变性的范围选择等问题，得到结论：对CGR图形进行多重分形时权重因子可以选择为-15≤q≤50；计算了不同序列的多重分形谱和广义维数，比较了不同序列不同尺度的多重分形谱和广义维数，发现多重分形谱和广义维数能够表现DNA序列CGR图形的不同层次的分形特征，能够区分更复杂的序列结构。

Infinite dimensional Hamiltonian operator;semigroups of linear operator;spectrum;residual spectrum;continuous spectrum

中文主题词：无穷维Hamilton算子；线性算子半群；谱；剩余谱；连续谱

This paperexplores the way to analyze the time domain amplitude spectrum , frequency domain power spectrum and inverse frequency spectrum todetect faults with AI technology, especially expert system.

本文探讨了利用智能技术特别是专家系统来进行旋转机械的时域幅值谱、频域功率谱及倒频谱分析，从而进行故障诊断的方法和途径。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？