对铜绿山矿采场冒顶的声发射特征和预报不准的原因进行了分析。
The sound emission characteristics and the causes for incorrect prediction of the stope roof fall at Tonglushan Mine were analysed.
本文通过视频信号与声频信号实验分析了燃气射流火焰的声发射特征。
Through the experimental analysis on the synchronous signal of audio and video of the premixed gas jet flame, the characteristic of the flame is studied.
谱的模式识别技术可用于强变化的背景压缩和提取化合物极为弱小的发射特征。
Spectral pattern recognition techniques are employed to suppress the strong and highly varying background to extract the very weak emission features from the compound spectra.
当污染气体与背景存在温差时，红外光谱就能反映出污染气体的吸收或发射特征。
When there is temperature difference between the pollutant gas and the background, the absorption and emission characteristics of the pollutant gas can be revealed in infrared spectra.
从而提出，可根据混凝上受载后的声发射特征来评价和估计混凝土材料的损伤程度。
Therefore, it is proPOsed that the damage degree of concrete can be evaluated and estimated by using AE characteristics.
采用含预制裂隙大理岩块试件，对压剪应力场中试件破坏过程声发射特征进行研究。
An experimental approach on the characters of acoustic emission (AE) of marble samples withpre-existing cracks under compression is carried out.
试验结果表明，煤样在不同应力路径下加载变形破坏过程中产生的声发射特征有所差异。
Test results indicate that the AE characteristics of coal specimens were different in deformation and failure process under different stress paths.
当这些激发的原子回到基态时，会发射特征波长的能量。单色器可把这些波长引到检测器。
When these excited atoms return to the ground state, they will emit energy of a characteristic wavelength. The monochromator can direct these wavelengths to a detector.
利用微机控制试验机进行了煤试样的巴西劈裂试验，对煤巴西劈裂全过程中的声发射特征进行了研究。
The PC controlled test machine was applied to the Brazilian splitting test of lump coal and the acoustic emission features of the coal during the Brazilian splitting process was studied.
利用模糊聚类特征优选方法对声发射传感器特征信息进行优选，并在此基础上给出了模糊聚类优选声发射特征的一般结论。
Based on fuzzy classification the features of AE signal were optimized, and on this basis a general conclusion of optimizing AE characteristics was reached.
声发射事件率在不同应力水平变化很大，峰值强度后的声发射现象仍然明显，其声发射特征随岩样破坏形式的不同而不同。
The AE rates change dramatically in different stages. In post-peak region, AE events stay evident and the AE characteristics depend on the failure type of rocks.
反对者称：“我们已经确定了导弹的种类特征，可是不知道其准确的发射时间”。
"We have certain information about the type and characteristics of the missile. However, we do not have accurate data on the timing of its launch," said the source, who was not identified.
纳米探针通过聚焦强X射线激发样品，然后收集发射出的特征荧光。
The nanoprobe excites the sample with a strongly focused X-ray beam and collects the characteristic fluorescence signal that is re-emitted.
用RFPA软件对钻孔冲击进行了数值模拟，验证了钻孔冲击实验得出的临界压力，并研究了钻孔冲击前、后的应力降及声发射等特征。
The software RFPA is used to simulate the borehole burst, validate critical pressure, and research the stress drop and acoustic emission before and after occurring the burst in the borehole.
最后通过对能反映源特征的频带信号进行重构，这样能更好更有效的提取声发射信号的本质特征。
At last, we recomposed some frequency band of wavelets, and the results can efficiently extract the features of acoustic emission signal.
本文在试验基础上，通过分析给出了定量考察声发射过程自相似性的自相似特征函数。
Based on the test and analysis, this paper gives self similarity feature functions of phonon emission process in quantitative test.
本文介绍了模态声发射检测技术的基本原理、信号特征、噪声剔除和源定位等内容。
This paper introduces modal acoustic emission evaluation technique, including its fundamental principles, signal characteristic, noise rejection and source location etc.
在分析了定子线圈电路特征和系统运动特性后，建立了多级电磁发射系统模型，并由此导出了系统方程。
After analyzing the characteristic of driving coil circuit and kinematics, the system model of multi-staged electromagnetic launcher is built and equation-solution is derived.
着重研究拉张或挤压型雁列式断层标本变形过程中声发射（简称AE，下同）的时空演化特征。
The spatiotemporal characteristics of acoustic emission (AE) during the deformation of rock samples with compressional and extensional en-echelon faults have been studied.
该成像算法利用二元混沌信号作为雷达发射信号，通过产生一个特征波形来指示目标的时延。
This imaging algorithm USES chaotic binary signals as transmitted radar signals and produces a characteristic waveform to indicate time delay.
与武器发射过程密切相关的舰船耐波性特征量的研究是陆基武器移植上舰的关键。
The key of army weapon's transplanting on ship is to study seakeeping characteristics of a ship related closely with the procedure of weapon's launching.
这些标签将发射它们的标识、格和其他特征（例如过期日子）。
The tags will broadcast their ID, price and other characteristics( such as the expiration date).
可以提供滤波器用于在接近特征发射峰值的区域之外的区域阻挡来自源的电离能量。
A filter may be provided for blocking ionizing energy from the source in regions other than a region proximate the characteristic emission peak.
第二原子种类具有实质上匹配检测器的吸收边沿的特征发射峰值。
The second atomic species has a characteristic emission peak that substantially matches the absorption edge of the detector.
其主要特征是均匀性掺杂，不仅反映在纳米电子发射材料的微观结构方面，而且表现在第二相的更加均匀分布方面。
The mainly characteristic of it is the high efficiency intermingles and homogeneous. Not only the microstructure but also the second phase is uniform.
在双向压缩条件下，研究了一种非均匀断层模型标本在变形过程中的声发射(AE)时空特征。
The spatial and temporal distribution of acoustic emission (AE) during the deformation of samples containing an inhomogeneous fault have been studied under biaxial compression condition.
本文研究了实验室内测定岩体地应力的两种新方法——声发射法和应力应变曲线特征点分析法。
In this paper, two new methods of determining in-situ stresses of rock masses in laboratory, acoustic emission method and analysis of typical points of stress-strain curves are investigated.
对受激电弧的声发射信号分析表明，从音频到超声频带，电弧声发射与激励频率之间存在着线性响应和非线性响应特征。
The characteristic of linear and nonlinear responses between arc excited ultrasonic emission and excited frequency was realized by the received signal from the acoustic to the ultrasonic spectrum.
对受激电弧的声发射信号分析表明，从音频到超声频带，电弧声发射与激励频率之间存在着线性响应和非线性响应特征。
The characteristic of linear and nonlinear responses between arc excited ultrasonic emission and excited frequency was realized by the received signal from the acoustic to the ultrasonic spectrum.
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