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It has been shown that this structure is very sensitive to initial imperfections, and the existence of the imperfection leads to a significant reduction in the stability load-carrying capacity.
It can be seen from Fig.10, the max stability load–carrying capacity is about 4100×103N.However,in the paper, E=2.1×105Mpa，L=3015mm，d=195mm，these data are put into ，the result is 4039.5×103N in the theory.

So in theory, the wear resistance of sample 3 is better than that of sample 1 and sample 2, this conclusion is identical with the follow experiment data. 1-Cr2Ni3 2-Ni17W3 3-Cr4Ni15W 4-CaF2 5-Co6W6C 6-Ti8C Fig.2 XRD patterns of the laser cladded coatings Fig.3 shows the distribution of micro-hardness along the depth of cladded layers.
This indicated that the formation of CaF2 in the cladded layers had given full scope to wear-resistant and attrition reduction, moreover, with the content of CaF2 in cladding materials increased, the abrasion loss of sample would reduce.

With the reduction of oxygen concentration, the great weight loss rate gradually increased.
Each sample correlation coefficient of fitting equation is close to 1, so the experimental data is fit to linear regression.

The basic data needed for program implementation are the electron mobility, expressed by p.µe= 3.105 cm2.V-1.S-1.Torr, for a working pressure of 0.1 Torr and the diffusion coefficient is calculated from the Einstein relation as follows [7]: De= (KB.Te/e)µe (11) Where KB is the Boltzmann constant and Te the electron temperature taken as 4 104 eV.
This increase, which is directly related to flight time, reflect a reduction of collisions between particles which is responsible for reducing the plasma zone Summary We presented in this paper a contribution to the numerical modeling of a continuous plasma discharge at low pressure.

Literature 3, 4 studied the effect of cold rolling reduction rate on the crystallization temperature; literature 5, 6 studied the effect of annealing technology on the morphology and mechanical properties of cold-rolled plates; literature 7 studied the time for heating steel tape in HPH furnace.
Three Specimens are prepared for each heat treating technology to ensure the accuracy of the data.

Under the promise of maintaining classification ability, it was given that decision-making and classification rule by knowledge reduction.
Recently, the rough set theory has been applied in many fields, such as machine learning, decision analysis, process control, pattern recognition and data mining.

Similar to Fourier expression, the above waveform by Walsh transform can get a group of Walsh function gather, as shown below (3) (4) Formula (3) simplified as follows on the basis of symmetry (5) Mark as the Walsh coefficient of waveform f (t) that the Walsh function correspond, combined with figure 2 The simulation result According to the data of above table draw the harmonic elimination switch angle trajectory as figure 3 show, the figure shows that modulation ratio in the range of 0 to 1 each band can get the correct switch angles.
[9] Tsorng-Juu L，O'Connell R M，Hoft R G．Inverter harmonic reduction using Walsh function harmonic elimination method[J]．IEEE Trans on Power Electronics，1997，12(6)：971-982

Simulation Results In order to contrast the noise reduction effect with different threshold denoising methods , we denoise a CCD image with soft and hard threshold method and the method proposed.
Here SNR and MSE are used to measure the denoising effect, Table1 shows the SNR and MSE data comparison of these three approaches.

Analyzing the data, it is possible to verify the predominance of Al2O3, SiO2, quartz, and Fe2O3 content in the composition of the clay.
Furthermore, this affects the reduction of the pieces dimensions.

Taking Xingwen World Geopark as an example, through the research on tourist traffic carbon footprint, investigating the condition of carbon emissions of the tourist traffic, it is helpful to confirm the target of energy-wasting and emission reduction, provide reference for market positioning and management measures of low-carbon tourism development.
According to the horizontal comparison based on the data in 2013, the emission of CO2 from bus and car is 3387.391t and 6641.944t, account for 34% and 66%, respectively.