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Therefore, the study on the relevant thermal physical properties of the low-melting-point alloy used for high-temperature heat transfer fluid of solar thermal power generation becomes necessary.
The thermal physical properties, specific heat capacity, thermal conductivity, phase change temperature and latent heat were studied by STA, laser thermal constants measuring apparatus and DSC, etc., respectively.
After 200, 400 and 800 times thermal cycle, the samples were taken out and were studied in metallographic phase, composition and thermal physical properties, etc.
With the cycle continuing, the two affecting factors cancel out and the thermal conductivity of alloy tend towards stability.
Mei, Properties of cast aluminum alloys as thermal storage materials, Cast Met. 4 (1990) 203-206

The previous results show that the distribution of internal oxide has significant effects on the mechanical properties, and the composites have good properties [1-4] only when the oxide distribute in grain of copper matrix.
According to the theory of internal oxidation [5], for normal binary alloy system, when the concentration of solute is low, internal oxidation is its mainly oxidation mode, and the formed oxide is also distributed in grains, thus the properties of the composites will be improved with the increase of oxide.
With increasing the concentration of solute, the formed oxides tend to distribute along grain boundaries and they even form a continuous healing layer to prevent the process of internal oxidation, and the properties of the composites will be deteriorated with the increase of oxide.
Fig. 1 The effect of Al content on the microstructure of Cu/Al2O3 (a) 0.8%Al; (b) 1.2%Al; (c) 1.6%Al; (d) 2.0%Al Factors affecting the distribution of oxide in Cu-Al and Cu-Cr system during internal oxidation process.
The difference between the distribution of the internal oxide developed in the Cu-Cr and Cu-Al system prepared by high energy milling is mainly caused by the following factors: Difference between the solid solution mode of Cr and Al into the lattice of Cu.

Introduction In the traditional rubber open mill mixing process, the process parameters are unchanged; while the rubber property is variable in the rubber mixing process, unchanged parameters are seriously affect the quality and efficiency of the open mill mixing[1].
(4) The relationship between roller pitch changes and physical and mechanical properties Fig .1(d, e, f) showed in the mixing process, when the roller pitch change was 0.5—0.6—0.7 mm, the roller pitch changes from small to big.
The rubber had the best physical and mechanical properties.
(4) The relationship between roller speed changes and physical and mechanical properties Fig .2(d, e, f) showed in the mixing process, when the roller speed change was 26—29—32r/min, the rubber has the better physical and mechanical properties.
(4) The relationship between roller speed ratio changes and physical and mechanical properties Fig .3 (d, e, f) showed in the mixing process, when the roller speed ratio change was 1.3—1.25—1.2（from big to small）, the rubber has the better physical and mechanical properties.

Electro-hydraulic proportional flow valve control complex variable pump and research its property for injection machine hydraulic system Lan Li1, a,Xue Fei Zheng1,b Xian Bo Xie1,c 1School of Mechanical Engineering, University of South China, Hengyang 421001, China ; a lljzl@163.com , b 476982905@qq.com, c xianboxie@foxmail.com Keywords:Electro-hydraulic Proportional Flow Valve,Complex Variable Pump, Model, Simulink Simulation Abstract.
According to the pilot valve by the force balance equation and the main valve of the mechanical equilibrium equation,flow continuity equations of pilot valve andand the main valve ,these equations are linearized and Laplace transformed,we gain the mathematical models as follows: (1) (2) In the formulas:is coefficient of flow pilot valve;, is coefficient of the flow- pressure in the pilot valve; is the export pressure of the main pump 1; is the export pressure of valve 2; is the open degree of pilot valve; is the vertical displacement of electro-hydraulic proportional valve; is the open degree electro-hydraulic proportional valve ; is elasticity module of oil volume ; is the volume of main valve top cavity ; is top area of main valve ;is area of pilot valve ; is liquid transfer of liquid resistance1; is liquid transfer of liquid resistance2.
From the simulation ,we realize the performance of electro-hydraulic proportional complex control pump affected by many factors .

INJECTION TESTS AND EFFECT ON MICROSTRUCTURE AND PROPERTIES OF ALUMINIUM 7075 DIRECT THERMAL METHOD FEEDSTOCK BILLETS A.H.
This was due to solid fraction within material that was found to be one of the foremost factors in determining the success of SSM processing [10].
The transfer time affects the fraction solid within the material.
[3] Brabazon D, Browne DJ, Carr AJ, Mechanical stir casting of aluminium alloys from the mushy state: process, microstructure and mechanical properties.
[13] Liu D, Atkinson HV, Kapranos P, Jirattiticharoean W, Jones H, Microstructural evolution and tensile mechanical properties of thixoformed high performance aluminium alloys.

This article induced external condition and internal factors of the sports building system firstly.
Furthermore it investigated different essential factors which constitutes the sports building system, proposed systematic design strategies such as function conformity adapting, highly effective structure shaping, rainwater utilization, solar energy utilization and so on.
The connotation essential factors constitute sports building system's skeleton, the extended conditions enrich the sports building system's compatibility, enable its comfortable existence, the two complement and actuate mutually.
Structure boundary conditions refer not only to beams, columns and other physical border, but the environment, geographical and societal factors which affect the building structure should be integrated into the boundary elements.
To carbon mitigation, structure matching should comply with the following principles: (1)Preference for lightweight and efficient tensegrity structures, such as looped cable roof, cable dome, suspen-dome etc, to avoid the whole structure system loss of seismic capacity or carrying capacity caused by some elements destruction, in order to take full advantage of the mechanical properties, to achieve its ecological significance of carbon mitigation.

It not only affects the patients' psychological and physical state but also brings complex social problems.
However, the muscle hardness is affected by many environmental and subjective factors.
The last muscle force and joint torque calculation method is based on the relations between muscle mechanical properties and bio-signals.
Xu: China Mechanical Engineering, Vol. 19 (2008), p. 571-574 [8] F.E.
Du, et al: Chinese Journal of Mechanical Engineering.

Effect of nanofillers on coating physico-chemical properties depends on: kind of filler, its concentration and dispersion level in the coating as well as interaction between filler particle surface and polymer matrix [5 - 9].
Coatings modified with nanofillers show better resistance to the action of mechanical factors (erosive particles), heat, humidity and weathering [13 - 15].
Tailoring properties to applications.
[8] Zhou S., Wu L., Sun J., Shen W.: The change of the properties of acrylic-based polyurethane via addition of nano-silica.
K., van den Rul H., Peeters R., Mullens J., Franco D.: Nanoparticles of γ-Al2O3 as perspective fillers of thermoplastic polymers improving their barrier properties.

Materials can undertake mechanical connection or adhesive without long-time decay.
The experiment choose laser power, layer thickness, scan line spacing, scan power four factors as experimental factors, each study factor select 3 levels.
Orthogonal experiment factors-levels table is shown in table 1.
Take mobile phone shell processing as an example, combined with layout position influence on various factors, analyze the mobile phone shell processing.
This paper gets a group of reasonable process parameters through orthogonal experiment, such as laser power 24 W, layer thicknesses 0.1 mm, scan line spacing 0.2 mm, scan power 10 W, the comprehensive properties of the sintering mobile phone shell is optimal, warping deformation is only 0.1638 mm.

There were reports on metal matrix composites reinforced with ceramics in the form of fibers, whiskers or particulates [5,6] that showed significant improvements in their physical and mechanical properties.
Microstructure and phases are among the important factors that determine physical and mechanical properties of alloys and composites.
Grain size, precipitates and foreign materials significantly influence the mechanical properties of alloys or composites.
Many literature have reported that the presence of spheroidal Si has tremendouly improved the mechanical properties of aluminum alloys [2-4].
Ray, Effect of aging on mechanical properties of 6063 Al-alloy using instrumented ball indentation technique, Materials Science and Engineering A 527(6)(2010) 1590-1594