采用动态压扩技术能较有效地抑制通信系统中的噪声干扰。
Using Dynamic Compressing-Expanding technology can efficiently reduce noise interference which exists widely in radio communications, even in wiring communications.
本文由此出发，导出在最小均方误差意义下的最佳矢量压扩量化设计。
On this basis, a design method of an optimal vector compandor with least mean square error criterion is derived.
论文重点介绍单片集成压扩器NE570在电信系统中的应用。文中给出了NE570的四种应用电路。
In this paper, we put emphasis upon introducing the applications of the monolithic integrated compandor NE570 in telecom system. Four applied circuits of NE570 are given.
仿真结果表明，与削波技术和传统的压扩技术相比，门限压扩以较小的系统复杂度获得了峰均比性能的改善。
Simulation results show that compared with clipping and the traditional companding techniques, threshold-based companding scheme can effectively improve the performance of PAPR with low complexity.
扩压器，发动机内压气机和燃烧室间的一个部件，用来降低空气流速并增高空气压力。
DIFFUSER, a part of an engine between the compressor and combustion chamber for reducing the airflow speed and increasing the air pressure.
扩压段应具有一定的长度以保证主气流减速到一定程度。 。
Thee diffuser length should be long enough to ensure the main flow deceleration.
提出了一种计算无叶扩压器两壁面上不可压缩三元紊流附面层的方法。
A method is proposed to calculated the incompressible three-dimensional turbulent boundary layer on both wall surfaces of vaneless diffusers.
在研究过程中，假定排气扩压器的气流为一元准稳定不可压缩气流，试验装置采用压缩气源供气。
In the process of investigation, it is assumed that gas flow through the exhaust diffusers is of one dimensional quasi-steady incompressible flow.
发现了叶片扩压器对遏制蜗壳对叶轮内流场的影响有明显的作用。
It is found that vane diffuser restrains the influence of the volute on the impeller.
给出了一种亚音速方转圆扩压器的设计方法，并对中心线形状、型面变化规律和扩张角等进行了选择和说明。
For matching turbine work condition, designed a diffuser that transformed square to round, chose Central Line and shape changed method, defined diffuser expanding Angle.
本文针对扩散混合新机制扩压函数，提出了它的基本设计原则。
To the new method (diffusion confusion functions) of diffusion and confusion, basic design principles are suggested in the paper.
实验结果表明用外部声激励的方法可以控制小展弦比扩压器内的复杂分离流动；
The study shows that complex flow separation in the diffuser can be effectively brought under control by external acoustic excitation.
通过壁面静压测量、流场显示及气动探针测量研究了不同掠型叶片组成的平面扩压叶栅特性。
The performance of rectangular compressor cascades composed of different swept blades was studied by static pressure measurement, flow visualization and probe measurement.
在相同叶轮出口速度下，叶片扩压器比无叶扩压器中气流速度下降迅速，叶轮出口处平均流场趋于均匀。
Under the same impeller outlet speed, the flow speed of blade diffuser is faster than the vaneless one. The average flow field at impeller outlet trends to uniform.
分析了圆管压入扩径时内径变化的规律和影响因素。
This paper analyzes the variation principles and influence factors of inside diameter in tube press expansion.
以常温空气为介质，通过改变扩压器附面层抽吸能力、混合室隔板长度、扩压器出口反压及主进气流量等条件进行试验。
The essential performance had been achieved by testing through changing boundary layer ejector pumping capacity, mixing chamber clapboard length, the counterpressure, main inlet mass flux and so on.
排气扩压器的作用是将发动机排出燃气的部分动能转换成压力能，真实模拟发动机排气反压和环境压力条件。
The function of exhaust diffuser is to transform part of momentum energy of exhaust gases from engine into pressure energy to simulate actual exhaust back pressure and environment pressure.
由计算结果分析了叶轮和无叶扩压器内部的速度、压力、马赫数分布，并和叶片扩压器进行了对比。
The velocity, temperature, pressure, and Mach number are analyzed according to the simulation result and the difference between vane diffuser and vaneless diffuser is studied.
详细分析了叶片扩压器内部的非定常流动现象和流动规律。
The phenomenon and law of unsteady flow in blade diffusor is analyzed in detail.
此外，通过试验证明：在离心压气机上采用双列叶栅扩压器，可以改善压气机性能，扩大压气机的稳定工作范围。
Furthermore, experiments show that the adoption of double-row cascade diffusers in centrifugal compressors will improve its performance and widen its stable operating range.
新设计压气机提高了通流能力，并且减小了扩压器尺寸。
The new design compressor improves the through-flow capability, and reduces the size of diffuser.
对现有风机节能改造可采用更换或切削叶轮、调整可调叶片角度，改变扩压器叶片角度以及风机变速运行等措施。
Changing or cutting the impeller, adjusting the angles of variable blades, changing the angles of pressure expander and variable speed of fans may be adopted for the energy-saving of fans on hand.
铸造的扩压器并镶有不锈钢叶片。
离心压缩机中，叶片扩压器对提高压缩机整机性能、拓宽有效运行范围发挥着举足轻重的作用。
Vaned diffuser plays an important role in centrifugal compressor as it can improve the performance of compressor and broaden the operating range.
分别对冷态条件下，无隙锥形旋流器燃烧室前扩压器内流场的分叉现象以及燃烧室内燃烧空间的流场分叉现象进行了数值模拟计算。
The numerical simulations of bifurcation phenomena in a combustor with a non slot conical swirler and in a diffuser fixed before the non slot conical swirler have been carried out.
结果表明弯叶片对扩压叶栅的改善的能力受进口边界层的特征影响。
It was found that the ability of improving diffusion cascade performance was affected by some characteristics of the inlet boundary layer.
介绍了某型离心压气机叶轮与五种径向扩压器匹配的试验研究。
This paper introduces an experimental study of a centrifugal compressor matching with five different types of radial diffusers.
当提高转速时，气流速度沿扩压器宽度方向的变化较小。
While the rotational speed increases, the velocity presents less variations in the hub-to-shroud direction.
当提高转速时，气流速度沿扩压器宽度方向的变化较小。
While the rotational speed increases, the velocity presents less variations in the hub-to-shroud direction.
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