noise trial

The simulation system for spacecraft acoustic test

航天器虚拟噪声试验系统方案设计

High frequency control of acoustic test of FY-2 satellite

“风云二号”卫星噪声试验高频段控制问题研究

The difference between random vibration tests and acoustic tests is analyzed with respect to their frequency ranges,energy inputs,vibration modes and transmission paths,respectively.

文章首先从频率范围、输入能量、振动模态和传递路径等四个方面对随机振动试验和噪声试验的差异进行了详细分析;之后从内声场和结构传递振动两方面对组件级试验的有效性进行初步评估,着重讨论组件级振动试验项目的优化选择方法;通过综合考虑,对航天器系统级振动试验项目的选择提出了合理建议。

A study on noise characteristics and sound insulation technology for high speed punch press;

高速冲床噪声特性及隔声技术的研究

Er~(3+)/Yb~(3+)Co-doped double-clad fiber amplifier pumped at 980 nm is analyzed for gain and noise characteristics based on the rate equation and light propagation equation.

基于速率方程和光传输方程,对980nm激光泵浦Er3+/Yb3+共掺双包层光纤放大器的增益和噪声特性进行了分析。

Built up pyroelectric detector circuit system s transmissionfunction,the system s noise characteristic and affection factor are analyzed,and the effect on fast response, stability,signal plus,and signalto noise of each parameter are discussed.

建立了热释电探测器电路系统的传递函数,分析了系统的噪声特性及影响因素,分析并讨论了各参数对系统快速性、稳定性、信号增益及信噪比的影响。

Analysis and strategic of decision threshold for VLSI circuits noise characteristics;

VLSI电路噪声特性检测阈值的分析及决策

Research of noise characteristics and multi-carrier modulation technology based on PLC communication

基于PLC通信的噪声特性及多载波调制技术研究

The noise spectra of ultrasonic cleaners are measured by two methods,and the noise characteristics are discussed.

应用两种方法测量了超声波清洗机的噪声频谱,讨论了超声波清洗机的噪声特性。

This article analyze the signal processing circuit noise character of a radio proximity fuze, and investigate the low noise design based on the analysis result and the reflect wave from the target.

以某无线电近炸引信为例,分析了该引信的噪声特性,并根据噪声分析的结果以及该引信的回波信号的特征进行了低噪声设计研究,根据对低噪声设计分析的结果可以看出,本文所提出低噪声设计原则是有效的、可行的。

In this paper,the main conception is introduced the way using noise character to hide the signal.

文中主要阐述了利用噪声特性来达到对信号隐蔽的目的,并讨论了该方法和其他信号加密方法的有效结合,及在特定情况下的应用和适应性。

The noise performance of the enhanced scheme is similar with the DCSK.

通过对其噪声性能进行理论分析和仿真分析可知,改进方案具有与DCSK相似的噪声特性,在混沌信号源带宽和信息信号长度相同的条件下,改进系统有更快的信息传输速率,并且改善了系统结构,提高了信号在传输中的安全性。

The insertion of isolator、filter and fiber grating can improve the gain and the noise performance of YDFAs, as predicted by a simple model.

用简单的分段模型分析了内插特殊光学元件的掺镱光纤放大器 ,分析表明 ,隔离器、滤波器和光纤光栅的使用不但可以提高放大器增益 ,而且同时能够使噪声特性得到优化 ,文中还讨论了隔离器、滤波器在光纤内的最佳位置。

From the test, the noise performance of the multi-finger accelerometer is about 8μg/ Hz with its scale acceleration of±15g .

通过测试:叉指式加速计的量程为±15g ,噪声特性为8μg/ Hz。

Noise Measure and Spectrum Analysis of 4100QBZL Diesel Engine with Different Fans

4100QBZL柴油机配不同风扇的噪声特性试验研究

The Model Experiment and Acoustic Characteristic Study on Noise Barrier;

降噪声屏障的模型试验和声学特性研究

Test Research on Vibrations and Noise Level in Transformer Core

变压器铁心振动和噪声特性的试验研究

EXPERIMENTAL STUDY ON SOUND ABSORPTION CHARACTERISTICS OF POROUS CRUMB RUBBER MODIFIED ASPHALT PAVEMENT

多孔橡胶粉改性沥青降噪路面材料吸声特性试验研究

An Experimental Study of the Dynamic Characteristics and the Noise of Valve-Actuating Mechanism in a Small High-Speed Air-Cooled Diesel Engine

小功率风冷高速柴油机配气机构动力特性及噪声的试验研究

Ambient Noise Characteristics During the Sheba Experiment; Master's Thesis SWAC4

Sheba实验期间的环境噪声特性/硕士论文

Experiment Research on Flow Noise and Hydrodynamics Character of Moonpool;

月池流噪声及水动力特性的实验研究

Acoustic similarity is the base of scaled model tests of underwater structure noise.

声学相似性是水下结构噪声模型试验的基础。

Assessment and Treatment of Noise in UHV AC Test Base

特高压交流试验基地的噪声评估与治理

On the basis of analysing composition and testing results of noise generated by high speed punch press, the major noise sourse and the noise characteristics are pointed out.

在对高速冲床的噪声组成及其测试结果分析的基础上，指出了主要噪声源及噪声特性。

Research on Tunneling Current Noise Characterization and Measurement Methods in MOSFETs

MOSFET隧穿漏电流噪声特性及测试方法研究

Research on the Characteristics and Measurement of the Shot Noise for Electronic Components

电子元器件散粒噪声特性及测试方法研究

Measurement and Comparison of Noise Characteristics of Subway Railcar Wheels with Different Structures

不同结构地铁车轮的噪声特性测试和对比分析

Based on the experiment, we describe the multilevel pipe pressure loading method that can simulate the high back pressure of pump and has low noise property.

在试验研究的基础上，论述了多级节流增压模拟水泵实际运行背压的低噪声特性。

Experimental Study on the Effect of Interior Noiseof Vehicles on Driver's Psychological Character

车内噪声对驾驶员心理特性影响的实验研究

Experimental Study on Radiation Characteristics of Rocket Engine Jet Noise

火箭发动机气动噪声辐射特性实验研究

Characteristic Frequency Analysis of Audible Noise Source in Transforming Region of UHV AC Test Base

特高压交流试验基地变电构架区可听噪声源特征频率分析

Research on the Sound Insulation Theory and Experiment Based on Noise of Motorcycle;

摩托车噪声屏蔽隔声理论与试验研究