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Low velocity impacts are considered as the most dangerous one because after an impact, a significant reduction in the mechanical performance may occur while the impact damage is usually hard to see.
A good consistency in data can be seen.

Measurement of contact measurement and non-contact measurement two species[1], contact measurement due to the needs to contact with the object to be measured, increase the measurement fee, measurement precision with measurement instrument of using are reduced, and can not measure the soft objects of certain physical quantities, so gradually replaced by non-contact measurement, non-contact measurement of advantages is measurement speed fast, and no necessary frequently for device maintenance, Give first place to laser measurement at present, laser measurement system is given a laser signal, high cost, accuracy is not very ideal, while the video precision measurement system for target image information need to measure [2], compared with laser measurement, cost reductions, and can achieve for complex shape object measurement, so video precision measurement systems developed for measuring, has very important practical significance.
Does not require additional capture device to get obtain real-time uncompressed video data and the image capture.

Table 1 Tensile testing data of a series of PBO sample Sample Tensile strength(MPa) Young's modulus(GPa) Elongation at break(%) PBO 33.28 0.55 6.05 0.03gMWCNTs/PBO 35.71 1.11 3.23 0.05gMWCNTs/PBO 35.77 0.41 8.67 0.08gMWCNTs/PBO 29.09 0.36 8.05 Dielectric properties.
Fig.4 showed that, the dielectric constant almost have no change when adding a small amount of carbon nanotubes; When the amount of carbon nanotubes exceeds the percolation threshold, the dielectric constant appeared a significant reduction to 1.2-1.5 under the test frequency range from 106 Hz to 109 Hz.

The measured diffraction data were analyzed using the special software, and the grain size and the internal microstrain of the alloys were also obtained in this process.
The diffraction patterns of Cu90Zr10 powders shows a peak broadening and a intensity reduction with increasing milling time, which means that the crystalline grain was becoming small and vast lattice distortion was produced [10].

Material and experimental method The true stress-strain data of GH4169 superalloy is obtained from the reference [3].
The reduction in height is 60% at the end of the compression tests.

The open- and closed-ring isomers of the diarylethene differ from each other not only in their absorption but also in various physical and chemical properties, such as luminescence, refractive indices, oxidation/reduction potentials, and chiralproperties, magnetic interactions, and so on [3].Among various photochromic compounds, diarylethene with heterocyclic rings has been developed as a new type of photochromic derivative.
The results showed that it can be useful in fluorescence molecular switch, scale optoelectronics and potential use for data storage.

The open- and closed-ring isomers of the diarylethene differ from each other not only in their absorption but also in various physical and chemical properties, such as luminescence, refractive indices, oxidation/reduction potentials, and chiralproperties, magnetic interactions, and so on [3].Among various photochromic compounds, diarylethene with heterocyclic rings has been developed as a new type of photochromic derivative.
The results showed that it can be useful in fluorescence molecular switch, scale optoelectronics and potential use for data storage.

Fig 8 shows some equipments used in the experiment, where item #1 is the force sensor which is used to measure motor force, item #2 is the voice coil motor, item #3 is the NC linear DC power supply which is used to provide the current for the VCM, item #4 is the data acquisition devices.
[3] Youm Woosub, Jung Jongkyu, Park Kyihwan, Vibration Reduction Control of a Voice Coil Motor (VCM) Nano Scanner[C].

Table 1 Mineral composition with X-ray diffraction analysis Depth (m) Mineral Composition(%) Clay Composition(%) Quartz Feldspar Plagioclase Calcite Dolomite Clay Kaolinite Illite Chlorite I/M 2512 72 15 2 1 8 2 64 21 6 10 2524 72 14 3 1 7 3 63 13 6 17 2532 75 11 4 0 9 1 71 22 0 7 Fig.1 depicted the capillary pressure curves from mercury intrusion data.
As shown in Fig.4, The core permeability decreased greatly with the reduction of fluid salinity.

It not only effective to retain the original signal and the useful signal of mutant part of the peak, but also the signal in time domain waveform is more smooth, indicating the wavelet de-noising can ensure the signal in the noise reduction process does not produce distortion.
Basic Tribological Data- A Useful Tool in Sealing Design, 12th International Conference on Fluid Sealing, Brighton, UK, (1989), paper C3: pp.175-186