Based on simulation results, the field characteristics of some kinds of non-axisymmetric focusing surfaces, including cylindrical surface and ellipsoidal surface, are analyzed.

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The method was applied to contour measurement of three different surfaces, an inc-lined plane, a part of cylindrical surface and a part of spherical surface.

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In operation, the screw cylindrical surface and the pump cylinder wall formed between the layer of oil film to prevent direct contact between the metal, so that screw tooth surface wear significantly reduced.

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According to the variations in friction coefficient, wear rate, temperature of tribo-pair and tribo-surface micro hardness with time, the tribological process lubricated by oil containing Mg_6Si_4O_(10)_8 shows quasi-periodicity with characteristic of damped oscillation, and quasi-period is 200 h; micro-hardness of the worn surface is one time higher than that of 45~# steel substrate.

在實驗室條件下，驗證了主要組分為Mg6Si4O108的金屬磨損自修復劑在45#鋼摩擦副表面形成修復保護層的能力2014Av天堂网旧版，得到了厚3～6 μm的反應層亚洲国内欧美第1页；采用Falex型摩擦磨損試驗機進行了長達400 h的摩擦磨損試驗，研究了在Mg6Si4O108潤滑下45#鋼摩擦副的摩擦磨損性能色综合色欲色综合色综合色综合、摩擦副摩擦表面顯微硬度和溫度隨時間變化的情況国产福利免费在。

An initial surface is determinated firstly, which is used as the datum plane to parameterize the discrete boundary points, and then an object function is established by the control points of B-spline surface.

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At the same time, the SEM study shows that gibbsite occurs on the sample surface. At 200 ℃, as dawsonite sandstone is being dissolved authigenic siderite forms. At 300℃, chlorite deposit on parts of the sample surface. The weak solution of dawsonite sandstone at 100℃ and the formation of siderite at 200℃ illuminate that CO2 being in carbonates in the strata can not be released when CO2 phase is adding to the system.

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The surface activity of fluorocarbon surfactants in organic liquids such as toluene,hexane,decane,cyclohexane,nitromethane,dimethylsulfoxide,1-butanol,etc.,was investigated by measurement of surface tension.

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Metal heating, the workpiece exposed to the air, it often happens oxidation, decarbonization (ie, reduce the carbon content of the surface of steel parts), This is part of the surface properties after heat treatment has a negative impact.

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Decay constant k of Surface Dynamics of the modified surface can be calculated using the measurement results of the contact angle and the angle - dependent XPS, being a probe, k values can be used to characterize the surfa...

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To improve some deficiency of calculation of reliability index in response surface method, point estimation of probability moment deduced by Resonbluth was introduced into response surface method.

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