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The research provides technical support for the precise thermal mechanical coupling of large-scale creep aging forming components. 1.
In creep aging forming, temperature is an important factor affecting the forming accuracy of components.
After the mold surface is compensated for springback, the forming accuracy of the component is basically not affected.[7].
Journal of Mechanical Working Technology1989;20:477-88
Properties of AA7075 aluminum alloy in aging and retrogression and reaging process.

Through the analysis of recycled concrete as structural components in the deficiencies of strength, seismic and fire resistance, indicates the importance of anti - fire properties of recycled concrete - filled steel tube.
In the future, in the wake of the building high-rise, large-scale and uses of the compound, fire factors will gradually increase and the fire scale will expand too.
Conclusion In order to deeply understand the difference between the recycle concrete -filled in steel tube and ordinary concrete column on the mechanical properties in the fire, it is necessary research recycle concrete -filled in steel tube refractory performance and design methods on the fire by theory and experiment.
At the same time, it is necessary research mechanical properties and work behavior to recycle concrete -filled in steel tube after fire, and formulates the repair reinforcement measures.
Recycled concrete high temperature properties [D].

The machinability of a work piece material depends on its mechanical properties and fracture behavior.
The properties of workpiece materials are shown in Table 2.
Final Equations in Terms of Actual Significant Factors are: MRR (Y1) = 57.26195 -1.55684 *A-0.10090*B+0.93635*C+0.019149*A2 ± 0.66 …
(2) The main significant factors affecting the value of the MRR are the power rating, grit size and slurry concentration.
(3) There is only one significant factor i.e. grit size affecting the value of SR (4) The material removal rate increases as the grain size increases.

Introduction Carbon fiber reinforced polymer (CFRP) composites are increasingly being used for a wide range of applications in the aerospace and automotive industries, owing to their superior physical and mechanical properties relative to weight over traditional materials such as steel and aluminium (CFRP is ~70% and 40% lighter respectively) while being only ~20% more expensive [1].
However, the highly abrasive nature of the carbon fibers and the low thermal conductivity of the resin matrix result in rapid tool wear, thus affecting the performance of cutting tools and surface quality [3].
Compared to TiB2 coating, diamond coating has a lower friction coefficient to decrease friction force and a better wear resistant property to keep the cutting edge sharp.
Tool wear is one of the most important factors in evaluating maintenance accuracy in machining.
Tool wear of double-helix cutter is more severe than that of multitooth router because of larger cutting force and poor heat dissipation property.

Being one of the important micro-alloying elements, niobium can refine solidification structure and enhance mechanical properties of grey cast iron [1~3].
Ductile iron has great production and wide application, also the number of nodular graphite per unit area has great influence on the solidification behavior, solidification structure, mechanical properties and shrinkage defects of ductile iron.
Roundness, a shape factor of the area and the profile of target, is anther index to describe the feature of nodular graphite.
It was the reason that massive NbC restrained the diffusion of carbon atoms in the solidification period and affected the roundness of graphite.
Mechanical industry press (1985), Beijing

Some mechanical properties (microhardness and fracture toughness) were also evaluated.
The use of Y2O3 and AlN as sintering aids gave excellent results for physical and mechanical properties in Si3N4-SiC(w) composites [19].
However, these phases can reduce the high temperature mechanical properties and can also affect the oxidation behavior of ceramics composites [27].
This behavior can produce mechanical properties anisotropy, mainly the fracture toughness [30-31].
Wachtman: Mechanical Properties of Ceramics, John Wiley Sons Inc, New York, 1996

Introduction In the design process of electric race cars, which main objective of the races is car economy, one of the most important factors affecting achieved result is aerodynamic quality of the car’s body shape.
The aim of the study was the Kammback effect, that allows to improve the aerodynamic properties of vehicles shapes.
This effect allows to shorten the body in relation to the original shape without worsen aerodynamic properties of shape.
The first model was a solid, which was the ideal shape in terms of aerodynamic (Fig. 1), which aerodynamic properties are described in the literature [3, 4].
For virtual aerodynamic tunnel proper properties of air were initialized.

In terms of its production technology, the technique formula of the raw materials for gypsum board is not only the main factors to determine the quality, but also determine the use of equipment related to production technology.
Studying the effect of water reducing agent on properties of gypsum, it can be found that compatibility of naphthalene series and gypsum is best.
There is no overlap with each other into a network, so the mechanical bite force between the materials is low.
In addition, when naphthalene superplasticizer is added into gypsum, on one hand it can play a significant role in promoting coagulation, on the other hand it can reduce the mixing water, and then it can improve significantly the mechanical properties of plaster.
When the mix ratio of the plaster, foam, coagulant agents and other raw materials maintain a certain and the mobility of plaster maintain essentially the same, adding the naphthalene superplasticizer into the production of gypsum board has no adverse effects on performance including setting time and mechanical properties.

On this basis the foundation settlement factors was analyzed systematically that focus on the elastic modulus of pile, pile spacing, pile diameter and pile length in foundation treatment, especially for the characteristics parameters of contact element.
Because the roadbed left and right sides are symmetrical, in order to reduce the computing workload, the physical and mechanical properties of cement-soil compaction pile is adopted which has been disposed to replace the original pile, and the half structure for numerical calculation of composite foundation is taken.
Reasonable mechanical model has been established, appropriate mechanical parameter has been chosen and then the mechanical characteristics of structure-soil surface is understood in depth.
Two element parameters which affect pile settlement significantly is analyzed, that is ultimate shear stress and shear modulus.
On this basis the foundation settlement factors is analyzed systematically.

Data mining is a new emerging subject which affecting area very broad and overlap, it involves database, artificial intelligence, mathematical statistic, visualization, parallel computing and other area.
Because the data inclined to be affected by data noise and inconformity or other factors, before we use the manner of data mining, the data always need to be treated first, in order to reduce the dimensions of the original data, and improve the quality of the data and the speed of mining.
Association Rules Association rules is a kind of simple, practical analysis rule, it describes the regulations and mode when some properties of one thing appear simultaneously, it is one of the most mature technique.
The students academic besides have connection with their intelligence, there also have many other factors, the most importantly of them is learning methods.
Data Mining Concepts and Techniques [M].Beijing: Mechanical Industry Press,2007,3:3-6