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Research of Denoising Technology about Wavelet Analysis with Wiener Filter Hu Yaobin1,a, Hu Liangbin1,b, Cheng Qiang1,c 1School of Mechanical Engineering, University of South China, Hengyang China ahyb116@sina.com, bhuliangbin83@sina.com, cchengqiang1989@126.com Keywords: wavelet analysis; wiener filter; power line noise; denoising process Abstract.
Interfering noise of power line is one of the important factors which affects the quality of power line communication (PLC).
(2) The whitening effect of wavelet transform depends on the orthogonal properties of the wavelet function.
Measurement Information Signal Analysis in Mechanical Engineering[M].

Li 1,e 1 College of Mechanical Engineering, South China University of Technology, Guangzhou 510641, China a dengwenjun@163.com, b mewxia@scut.edu.cn, czhouzhaoyao@hotmail.com, d mewpchen@scut.edu.cn, emehjli@scut.edu.cn.
A three-dimensional coupled thermal-mechanical model of ball burnishing process is developed using commercial explicit finite element code MSC.
Temperature-dependent material properties are also considered in this analysis.
The number of passes is one of the most significant factors affecting (c) n=3 Advances in Materials Manufacturing Science and Technology 662 the maximum residual stress and the maximum depth at the compressive stress state (Fig.6).
A three-dimensional coupled thermal-mechanical model of ball burnishing process is presented in this paper.

The Optimization Design of Vacuum Chamber in Vacuum Electron Beam Welding Machine Weiwei Yue1, a,Yimei Song1,b ,Dongbo Zhou 1,c ,Cai Liao1,d and Danping Liu1,e 1 School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, 541004, China agood8593144@yahoo.cn, bsongym@guet.edu.cn, czdb799@126.com, dliaocai2007@163.com, edanping0403@163.com Keywords: Vacuum chamber, Computer simulation, Optimization.
Chamber deformation in vacuum electron beam welding machine directly affects the processing precision of whole equipment.In order to further improve performance of the welding machine,by the use of the computer simulation software, the Chamber structure in some type of vacuum electron beam welding machine,was optimized designed.
Thus, the deformation of vacuum chamer will affect the kinematic accuracy of moving parts and electron gun, and directly cause the bad welding quality.
Some unimportance factors could be gnored,and quote some assumptions, Kirchhoff's hypothesis.
Looking up the related manual about mechanical design,we can get material property parameters.

Liu’s study [12] suggested that liquid viscosity influenced the wall shear stress, thus affecting corrosion rate.
The establishment of mechanical models needs to have a clear and deep understanding of corrosion mechanism, diffusion micro mechanism, and critical controlling factors.
As crude oil is a mixture of varied organic compounds, of which chemical compositions and physical properties are very complex.
Crude oil produced by different fields differs quite a bit in compositions and properties.
The factors used to study the impact of crude oil on corrosion includes oil’s composition, water content, salt content (conductivity), viscosity properties, sulfur content, total acid number (TAN), wettability etc.

The acoustic model of ultrasonic lapping was proposed, the track equations of ultrasonic lapping with different vibration modes were deduced, the influencing factors of lapping tracks were obtained, and the lapping tracks with different lapping parameters had been emulated.
In the paper, on the base of common lapping, ultrasonic vibration was adopted to realize the ultraprecision machining of hard-brittle materials, the lapping tracks of ultrasonic lapping and common lapping with different lapping parameters were simulated, which have some significance to guide the production practice for the engineering ceramics parts meeting the requirements of precision, surface roughness and material properties.
During ultrasonic lapping, the high-frequency electric oscillations generated by ultrasonic generator becomes mechanical vibration through transducer, the minute mechanical vibration is magnified and transferred to vibration lapper by amplitude pole, which makes the vibration lapper generate regular forced vibration, and the oilstone generates high frequency vibration droved by vibration lapper, then the workpiece is lapped with vibration.
From the relative motion equation, we can know that the track length will be affected when the speeds change.
Conclusion The acoustic model of ultrasonic vibration lapping is proposed, the track equations of ultrasonic lapping with different vibration modes are deduced, the influencing factors on lapping tracks are obtained, and the lapping tracks of ultrasonic lapping and common lapping with different lapping parameters have been simulated.

If a concentrated load, F, is applied to the free end of a rectangular beam, then the deflection of the free end of the beam, δ, is given as [2] δ = FL3 / 3EI Eq.2 Mechanical Properties of Cantilevers Cantilever is characterized by two basic mechanical quantities, the spring constant and the resonance frequency [5].
Define Material Material that we use to make a cantilever i.e. silicon dioxide, poly-silicon and nitride with their different elastic properties like Young’s Modulus, Poisson’s ratio and density.
Flow and mixing of the solution cause turbulence which directly affects cantilever deflection.
All these material have different properties, like Young Modulus, Poisson Ratio and densities etc. that is shown in Table.2.
Table 2: Elastic Properties of different materials.

The effect of Cu, Ni, Fe, Mn on the mechanical properties of Al-Si alloy by orthogonal experiment methodwas investigated in this paper.
Table 2 Room and high temperature tensile strength orthogonal test results No. ωB Room temperature High temperature（300℃） Cu Ni Mn Fe σb/MPa σb/MPa 1 0.5 0.7 0.2 0.3 215 190 2 0.5 1.5 0.5 0.6 196 177 3 0.5 2.3 0.8 0.9 277 175.5 4 1 0.7 0.5 0.9 249 212 5 1 1.5 0.8 0.3 196 204 6 1 2.3 0.2 0.6 202 193 7 1.5 0.7 0.8 0.6 211 178 8 1.5 1.5 0.2 0.9 196 170 9 1.5 2.3 0.5 0.3 231 201 Table 3 Tensile strength range analysis Range Hightemperature strength Roomtemperature strength Cu Ni Mn Fe Cu Ni Mn Fe KⅠ 180.83 193.30 184.33 198.33 229.33 225.00 204.33 214.00 KⅡ 203.00 183.70 196.67 182.67 215.67 196.00 225.33 203.00 KⅢ 183.00 189.80 185.83 185.83 212.67 236.70 228.00 240.67 R 22.17 9.60 12.34 15.66 16.66 40.70 24.00 37.67 Factors order 1 4 3 2 4 1 3 2 As can be seen from Table 3, the greatest impact of alloy elements on the tensile strength at room temperature is Ni, followed by the Fe, Mn, Cu; Cu is the most affected element on high temperature tensile strength
This phase causes severely matrix fragment, thus reduces the mechanical properties of the Al-Si alloy and is regarded as harmful with restriction.
This conversion further improves the morphology of Fe phase, reduces the stress concentration of herringbone Fe phase, and improve the mechanical properties of the alloy.
Effects of Cu on microstructure and mechanical properties in Al-Si-Cu-Ni alloy.Special Casting & Nonferrous Alloys，2010,30（9）,ppC871-873.

The number of factors and their interfaces. 2.
Base metal, weld zone and heat affected zones are analyzed by scanning electron microscope method.
Finding Result We can find out in friction stir welding, the grain structure can be divided into several major zone ü Fine equated crystallites in the nugget at the weld center nugget zone ü Highly elongated grain with very small cells retracting and advancing side thermo mechanical affected zone (TMAZ) and ü Slightly elongated coarse grain in the heat affected zone (HAZ) and base metal (BM) The formation of fine, equiaxed grains and uniformly distributed, very fine strengthening occasions happened in the weld region are the reasons for highly tensile properties of friction stir welding joints.
Mechanical properties of friction stir welded dissimilar aluminium matrix composites.
Prediction of wear and mechanical properties of copper surface composites fabricated using friction stir processing.

So it is meanful to use some technologies to improve the comprehensive properties of the metal materials.
As we all known, the structure of the materials’ organization affect the using properties directly.
So, improving the surface properties of the material is meaningful to the improvement of the whole active service of the metal material.
Using the nano technology to improve the comprehensive properties and lifespan of the metal matericals is with big application potential and market prospect.
The literature[13] studied the influence of the surface mechanical attrition treatment (SMAT) to the surface properties of the alloy.Zr-4.

Addition of aluminum increases the castability, influences on the reduction size of grains and improves the mechanical properties of the alloy [4].
The chemical composition of Zn-Al alloys, alloy was modified by addition of 2 - 3% copper [5, 6], which improves the mechanical and tribological properties of alloys, and increases the density [4].
High resistance can reduce the damaging factors of the passive layer - such as chloride ions.
Analysis of literature data shows that prolonged heating of the alloy at approx. temperature of185°C affects the decrease in hardness and thus the deterioration of tribological properties [8].
An important factor affecting the corrosion resistance of the layer is rich in copper.