复合频率

The principle of testing the dynamic performance infrequency domain of rotary table control system by computeris described and the causes of spectrum leakage by dispersion Fourier transform are introduced.

简要介绍了用计算机实现数字化测试转台控制系统频率特性的原理和离散傅里叶变换频谱泄漏产生的原因，然后针对正弦稳态测试，采用了一种调整采样周期和匹配采样长度的复合数据处理算法。

Time domain signal is transformed to the frequency domain signal by FFT. Dispersion curve is obtained from phase angle that is calculated by the frequency spectrum analysis. A compound dispersion curve is obtained from the dispersion curves intervale, and the representative dispersion curve is used to evaluate dimensions and quality of soil grouting body.

由FLAC所得不同点位的速度历时透过快速傅立叶转换后，得到频率域讯号，再经过频谱分析计算其相位角，得到其频散曲线，由不同间距的频散曲线集合成复合频散曲线，再绘制成一"代表性"频散曲线，以评估灌浆体品质及范围。

Calculating formula of wave impedance is obtained by main values of the inverse tangent function of phase_shift at two neighboring frequencies and the corresponding integral character of phase_shift is denoted as the convergent criterion of wave impedance inversion.

利用复合反射系数中多个频率点的相移反正切函数主值，给出了波阻抗的计算公式，并把套管-地层环空间介质中波的相移的整、实特性作为波阻抗反演收敛的判据。

The first, A finite element method to compute the natural frequency of sandwich plates is found.

首先对粘弹性复合夹层结构的固有频率和动力响应进行研究，给出了一种计算粘弹性阻尼夹层板结构动力响应的方法，并编制程序进行求解。

A Chunk is a conventional compound, a frequently used phrase or word, which has the characteristics of easy to extract and prefabricate.

语块是约定俗成的复合物，是使用频率较高的短语词汇，它具有易提取性和预制性。

Features of technology: 1 Reasonable and firming structure of superhigh pressed components wholly adjusting high-quality sanforized materials with antisepsis and wearability .2 Low reversing rate of superhigh pressed Vessed doable-agency piston long durability 3 Driven by servo mator high precision ball screw and linear track ensuring slability .

技术特点：结构上采用套装复合缸，选用高强度材料，利用特殊的防腐耐磨处理，结合大排量低频率，使其使用寿命更长，系统压力更加稳定，运动部件采用伺服电机，配置滚珠丝杠和直线导轨运动精度高。

Special requirements not included or differemt to that in the firsr generation products,such as the syntonic frequency,coated glue,additional paper circle,colors,etc.

特殊要求——与第一代产品要求不同或原先没有该要求的，如纸盆的谐振频率等等不同，复合盆的涂胶、加纸圈、颜色等不同要求。

It was discovered in the experiments that the pulse frequency of the plasma is the main parameter for the bond breaking of the active species and the compositely formation of nano magnetic particales.

实验研究发现，等离子体脉冲频率是活性物种断键复合生成纳米磁性颗粒，制备氮化铁磁流体的主要放电参数。

Sleep-deprivation EEG was performed individually. Results The sleep deprivation EEG showed slow background electric activity in all 3 groups. In addition, the rates of EEG abnormality for nonepileptic seizures group were zero, no statistics were computed because F was a constant. Fifty-seven cases showed spindle/sharp-slow wave complex in suspected epileptic children.

结果 所有病例脑电图的背景电活动频率均明显变慢，非癫癎发作组38例睡眠EEG诱发试验均为阴性，因其诱发试验前后数据一致，故该组无统计意义；拟诊癫癎组脑电图有棘／尖慢复合波等癫癎样放电者57例(559%)；对照组诱发后脑电图异常出现2例(1.9%)癫癎样放电者，3组比较有非常显著差异(x^2=97.3 P0.01)。

This paper is mainly comprised of two components:preparation of models of rats suffering from deficiency of spleen Yang;comparison of the pharmacodynamics impacts of different Lizhong Pills formulations made up by dried ginger or its different components in Lizhong Pills to the different groups of the models.1 Establish the model of deficiency of spleen YANG induced by " cypsum fibrosum and anemarrhenae " with complex factors1.1 ObjectivesWith using heat-clearing and fire-purging drug cypsum fibrosum and anemarrhenae,insteading of the common usage of rhubarb and folium sennae,accompanied with irregular diet and overstrained,the model of deficiency of spleen-YANG is to be established,which is much close to the pathopoiesis theory of " frigidity and chilly damaging yang,irregular diet injuring qi,overstrain impairing the spleen" in TCM.1.2 MethodsModel rats is fully fed every other day,given the molding drug of cypsum fibrosum -anemarrhenae(concentration 4:1) with 3 different frequency,and arranged to swim everyday in 25℃water until exhausted(performing as spitting bubble 3 times continuously or sinking unable to float by itself).

全文共分为脾阳虚模型的制备和干姜及其成分对理中丸药效学影响的比较两大部分。1&石膏-知母&复合法脾阳虚模型的制备1.1目的以清热泻火药石膏-知母代替常用的大黄、番泻叶类苦寒泻下药，并结合饥饱失常、劳倦过度的方法进行造模，以期建立更符合中医&寒凉伤阳、饥饱伤气和劳倦伤脾&致病思路的中医脾阳虚证候模型。1.2方法模型动物隔日足量喂食，每日在25℃水中游泳，直至大鼠连续三次吐泡下沉，或沉入水底，3秒内不能自行浮出水面，并以三种不同给药频率灌胃给予石膏一知母煎液，比较石膏-知母不同给药方法对制备脾阳虚模型的影响。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。