模数的

In front of the A/D converter in an analog conversion system is usually located a sample-and-hold circuit.

在模拟量转换系统中在模/数转换器的前端通常都会有一个采样-保持电路。

The spiral angle of graduated circle was rough estimated by measuring the addendum circle diameter and modified on milling machine.

介绍了精确测绘单一斜齿圆柱齿轮齿形参数的简便方法，即测量公法线长度计算基圆齿距从而查表确定模数和压力角；测量齿顶圆直径估算分度圆螺旋角，用分度头在铣床上修正分度圆螺旋角，并进行误差分析。

However, in the real world, the performance of an analog to digital converter is constrained by many factors.

但是，在真实世界中，模数转换器的性能受到许多因素制约。

Analog to Digital Converter is the interface of analog and digital circuit, its use is very extensive.

模数转换器是模拟电路和数字电路的接口，其用途非常广泛。

One of these constraining factors is self generated noise within the analog to digital converter.

这些制约因素之一是在模数转换器内自生的噪声。

The output of the sample-and-hold system now goes into an analog-to-digital converter.

取样和保持系统的输出现在又进入一个模数转换器。

Along with increment of mean photon number, there is no change in the oscillation period of the squeezing curve, but its scope increases obviously and its stability begins to reduce; when the mean photon number and the field mold structure fixed, the speed of moving atom has a great infection on the extent and period of the radiation squeeze. With the speed of moving atom increasing, not only the complete squeezing effect would be archived, the stability would also enhance.

随着平均光子数的增加，压缩曲线的振荡周期没有明显的变化，压缩曲线的振荡幅度明显增大，压缩的稳定性变小；在平均光子数和场模结构参数一定时，原子运动速度对光场压缩的深度以及压缩周期影响程度较大，增大原子运动速度，不但可以实现完全压缩光场，而且压缩的稳定性得到提高。

Calculates the coordinates of the spindle and drive shaft and checking the center distance, determined department spindle must use dislodges the gear.

根据柴油机齿轮室盖的结构特点、加工部位、尺寸精度、表面粗糙度及生产率等要求，确定该机床为单工位卧式组合机床；为确保加工精度，采用&一面两销&的定位方案；为实现无级调速，安全可靠，选择液压滑台；根据零件的大小及被加工孔的位置确定主轴箱的轮廓尺寸；由加工工艺选择滚珠轴承主轴，通过计算扭矩确定主轴和传动轴的直径；齿轮的模数是通过类比法确定；齿轮齿数和中间传动轴的位置是由&计算、作图和多次试凑&相结合的办法确定；计算主轴、传动轴的坐标并进行中心距验算，确定部分轴上需采用变位齿轮；轴上的齿轮套、键等零件按轴号选取相应的标准件。

The distributions of velocity, velocity gradient, shear stress, clongation stress, first normal stress difference and pressure of the flow of a power-law fluid in the profile die were analyzed. It indicates that for a power-law fluid only after a few iterations a good convergence can be reached, even though in the case of high extrusion velocity.

详细分析了聚合物口模挤出三维计算机模拟研究中的若干关键技术问题，如对异型材结构特点的分析、边界条件的确定、初始速度场的自动生成、罚数的求取、粘弹性流动模拟中的高We数问题、三维挤出胀大的自由界面更新等。

The results show that the atomic population is time-independent provided that the atoms are in |β11〉 state. For the other three Bell states, there will appear the periodical collapse revival of atomic populationif the initial mean photon number reaches some special values. With the increase of the initial mean photon number, the oscillation frequency of the time-evolution of atomic population increases correspondingly, and the amplitude decreases. The degree of the entanglement of the two-mode entangled coherent field has no

结果表明，当双原子体系的初态为|β11〉时，原子布居均不随时间变化；当双原子体系的初态为|β00〉，|β01〉或|β10〉且初始平均光子数达到一定值时，演化特性呈现周期性的崩塌-回复效应，并随初始光子数的增加，其演化曲线的振荡频率增大，振幅减小；双模纠缠相干光场的纠缠程度不影响Rabi振荡频率，但对振幅影响显著； Kerr介质与光场耦合系数达到一定值时，对Rabi振荡频率和幅度及原子布居的崩塌-回复周期产生强烈影响。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。