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However, welding parameter are very important factor that affect to quality, and reliability of parts because an improper welding can cause decreased tool life [1-3].
The material of low weldability, such as SKD 61 hot work tool steel, undesirable hardness influenced by thermal distribution in any repair welding and especially near the bead area or heat affect zone (HAZ) is very essential factor which has an effect on material properties.
This unique structure has a strong influence on hardness properties.
The effect of welding on hardness properties.
Mar drl Plata (2005) [10] Leshchinskiy L.K, Samotugin S.S: Mechanical properties of plasma-hardened 5% chromium tool steel deposited by arc welding.

That is because: the main factors which affect the cutting force are the material, cutting parameters, tool material, the tool geometry parameters, the cooling conditions and the wear of the tool.
In which the work material's physical and the mechanical property are the greatest impact.
That is because, in the cutting process, the main factor affecting the tool life is the cutting heat.
(Mechanical Industry press, China 1996),p.87-103
(Mechanical Industry Press, China 1985) p.46-152

The main parameters affecting the CM position accuracy is the measurement error of electronic scales.
As for the transmission error of matrix transformation，the main factors of errors are the corresponding direction cosine matrix, namely the corresponding directions angle of the selected six any axis.
(2) Analyze the test error of the motor assembly inertial parameters to find the main factors of errors and give the error calculation formula.
Mechanical Systems and Signal Processing, 2001, 15(1):189-211
[2] R.A.B.Almeida,A.P.V.Urgueira and N.M.M.Maia.Idetification of rigid body properties from viberation measurements.

School of Mechanical, Electrical & Information Engineering of Shandong University at weihai，Weihai, 264209 2.
Introduction The boron is an important impurity that may affect the hardness, strength, optical absorption and other physical properties of diamonds [1-4].
This means different boron content in the catalyst is an important factor that affects the oxidation resistance of diamond differently.
It is the boron compounds included in the diamond crystals that affect the thermal stability of synthetic diamonds.
,Vohra, Mechanical properties of boron doped diamond films prepared by MPCVD, Materials Research Society Symposium - Proceedings, Mechanical Properties of Nanostructured Materials and Nonocomposites, v 791 (2003): pp.265-270 [7] Barnes, R.

The feedstock filament will have the desired mechanical thermal and rheological properties as desired for Rapid Tooling applications.
The mechanical and thermal properties of the composed material used for feed stock filament meet the flexibility, stiffness, and viscosity requirements of the FDM process.
From the compression test, it was confirmed that build direction was important process parameter that affects mechanical properties.
The mechanical properties like youngs modulus , tensile strength and yield strenth will be tested as per ASTM standards and the similar properties of P430 material will be compared to check the suitability of the new proposed hybrid wire in the FDM machine.
Sbarski, Thermo Mechanical Properties of a highly filled Polymeric Composites for Fused Deposition Modeling, Materials and Design 32 2011 3448-3456

Study of Stirrer Disc Structure Type on Grinding Performance of a Horizontal Stirred Mill Junkun Jiang1, a *, Weimin Dong1,b, Zhan Su2,c 1Faculty of Mechanical and Electrical Engineering , Kunming University of Science and Technology, Kunming 650500,China 2Jinchuan Group Co.
There are many factors that influence grinding efficiency of horizontal stirred mill, for example: filling rate, the ratio of the balls and material, the size of the medium balls, material properties, and stirrer speed, etc., in addition the influence of the Stirrer disc structure on stirred mill grinding efficiency cannot be ignored [2].
Table 1 The basic parameters of the simulation model Parameter Values Medium ball ‘s diameter /mm 4 Medium ball’s fill rates 60% Agitator rotational speed /rpm 600 Medium poisson's ratio μ 0.29 Medium ball shear modulus /Pa 2e+07 Medium ball material density /kg·m-3 3700 Media - media ball recovery coefficient 0.5 Media - media ball static friction coefficient 0.3 Media - media ball rolling friction coefficient 0.01 Cylinder poisson's ratio μ 0.3 Cylinder shear modulus /Pa 1e+10 Cylinder material density /kg·m-3 7850 Medium ball - cylinder recovery coefficient 0.5 Medium ball - barrel static friction coefficient 0.5 Medium ball - barrel rolling friction coefficient 0.01 The simulation results and discussion Parameters affecting the effects of particle grinding in the cylinder cavity -- The statistical chart of average maximum normal force Fn(max),average particle compressive force Fc,Particle collision frequency Cf,Consumed power P is shown in figure 3~6.
Considering other parameters affecting the effects of particle grinding in the cylinder cavity -- average maximum normal force Fn(max),average particle compressive force Fc,Particle collision frequency Cf,Consumed power P, We can see when the stirred plate structure is T type, the stirred mill grinding efficiency is highest, round’s grinding efficiency is minimum.

Among the semiconductors employed, TiO2 are the most extensively used photocatalyst due to their high photocatalytic activity, non-toxic nature, inexpensive, excellent chemical and mechanical stability[3].
Sulfide photocatalysts have good light absorption properties and photocatalytic properties, but single sulfides are easy to appear light corrosion phenomenon and the photocatalytic efficiency is low [5,6].
The calcined temperature and calcined time also affect the photocatalytic activity of CdS/ZnS/TiO2 composite photocatalysts.
The high photocatalytic activity of the MS /TiO2 composites is attributed to the following two factors: the one is that TiO2 nano-powders make the target pollutants at a high concentration level around the surface of the composite photocatalysts because of their strong adsorption properties, thus the collision rate between pollutants and photocatalysts is increased; the other is the efficient separation of electron–hole pairs due to the existence of MS.
Both of the two factors cooperate and make the composite photocatalysts own good photocatalystic performance.

Polypropylene offers high tough, impact, low density and have good binding properties, heat resistance, low moisture absorption, light weight, non toxic.
In the analysis, the percentage distributions of each control factor were used to measure the corresponding effects on the quality characteristics.
The figure 6 (c) shows the effect of spindle speed on drilling of GFR/PP composites and result indicates that spindle speed is not a significant factor affecting the roundness error.
Feed rate and Drill diameter are the highly influential parameters which affect the roundness.
[2] Wakeman MD, Cain TA, Rudd CD, Brooks R, Long AC, “Compression moulding of glass and polypropylene composites for optimised macro- and micro-mechanical properties.

The effects of spinning conditions on membrane structures and properties were investigated in present study.
There are various factors that determine the formation and structure of hollow fiber membranes such as bore fluid and dope compositions, fiber spinning parameters like polymer extrusion rate, fiber take up rate, air gap distance, coagulant composition and condition, etc [4,5].
Mechanical properties of PSF hollow fiber membranes were tested by electronic yarn strength tester in this experiment.
PVP is known to promote the pore formation in the polymeric membranes and thus enhance the permeation properties [6].
Fig.4: Effect of air length on the pure water flux (J) and rejection coefficient (R) The conclusion (1) PVP concentration promoted the pore formation in the polymeric membranes and enhanced the permeation properties.

Also, a coarsening rate of primary solid phase was not considered to be affected significantly by a holding temperature even though a little lower coarsening rate was obtained at the higher holding temperature.
Introduction As known to many studies for semi-solid processing (SSP) in comparison with conventional casting, it has been recognized that SSP can offer many advantages such as less energy consumption, long mold life due to casting at semi-solid region and it is possible to produce the product having the superior mechanical properties as well as the near net shape of complicated product without defects [1-2].
Also the holding temperature was related to a volume fraction of solid phase of semi-solid slurry and can affect a flow behavior of semi-solid slurry during the rheocasting process.
The size of primary solid phase was largely affected by a holding temperature.
Because the slurry has the fine and globular structure required in rheoforming process under this condition or else too coarsening particle has affected on the mechanical property of product.