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Introduction Due to their inherent advantages such as low density, high damping properties, good machinability and EMI shielding, magnesium (Mg) alloys have gained an increasing attention as a society-supporting material together with preceding structural Al alloys and steel.
Among them, lightness is an essential factor for transportation vehicles and portable IT products, but in view of safety, crashworthiness and comfortableness, high damping characteristics of the Mg alloys to suppress unwanted noise, irregular vibrations and resulting structural instabilities are also very important [1-2].
AZ91 (Mg-9%Al-1%Zn-0.2%Mn) is the most preferred structural Mg casting alloy owing to its best combination of castability, room temperature mechanical strength and corrosion resistance.
In spite of numerous researches on microstructures and mechanical properties for the aged AZ91 alloy, however, few works have been carried out on its damping capacity.
The 1 hour of aging leads to the peak level of damping capacity and further aging affects to lower the damping capacity gradually.

During other periods of time, mechanical ventilation methods are still needed to control the humidity and air quality of indoor environment.
In these situations, in order to avoid affecting the indoor comfort and safety, the top windows of ventilation tower should be automatically closed.
Among of these items of sensors, the indoor CO2 concentration is a key factor for driving HRV to maintain a good air quality.
In the future, other monitoring factors, such as sound, light, water, electromagnetic wave or others can be taken into consideration.
Property Management, 9 Iss: 2 (1991), pp.162-176 [12] ASHRAE, Ventilation for Acceptable Indoor Air Quality, ANSI/ASHRAE Standard 62-2001 (2001), p.25

The double layer affects the arrangements of the clay particles , and hence, the physical and mechanical properties of the soil are also affected [6].
The properties of the soil sample are shown in Table 1.
The chemical properties of the waste dust is shown in Table 2.
Cementitious properties of super-fine steel slag.
Effect of mechanical activation on the hydraulic properties of stainless steel slags.

It is one of the main factors resulting in the flight vehicles failure.
As a result, the wind tunnel test must be carried out to study the transonic speed flutter properties of flight vehicles [1, 2, 3].
Using the flutter test of the component model to check the flutter properties of flight vehicles are workable when the component-to-component structure is not coupled or coupled in a low degree [4].
FSS Mechanical System.
Objective of this wind tunnel test is to test the control capacity of FSS control system to the model and examine the flutter properties of the model when the Mach number Ma=0.70 and 0.90.

The results show that thickness variation, residual stress, and work hardening of the material after forming affect collision processes directly.
Materials Properties The chemical composition of TRIP 780 is shown in Table 1.
The mechanical properties of TRIP 780 and HSLA 340 steel sheets are presented in Table 2.
Table 1 Chemical composition of TRIP780 Sheet (wt %) Material C Si Mn Al P S Nb TRIP780 0.19 1.4 1.5 0.03 0.02 0.01 0.08 Fig. 1 Typical micrographs of TRIP 780 Fig. 2 Engineer stress-strain curve of TRIP 780 Table 2 Mechanical properties of TRIP 780 and HSLA 340 sheets Material ReL /MPa Rm /MPa A50 % YR r TRIP780 532 795 24.0 0.67 1.05 HSLA340 370 450 28.0 0.82 1.05 U-beam Stamping and Springback The stamping of the U-beam was carried out on the automobile sheet metal forming test machine.
Table 4 Deformation Results of Collision Simulation Factor TRIP780 HSLA340 Mapped Not Mapped It is noticed from the simulation results that whether the influence of stamping is considered will affect the final deformation result significantly.

Similarly, the jatropha oil was analysed for their physiochemical properties using ASTM.
The results of physicochemical properties were listed in Table 2.
Table 2 Physicochemical properties of jatropha oil S.No Physiochemical Properties Jatropha Oil 1.
Pramanik, Properties and use of Jatropha curcas oil and diesel fuel blends in compression ignition engine, Int.
Becker, Comparative evaluation of non-toxic and toxic varieties of Jatropha curcas for chemical composition, digestibility, protein degradability and toxic factors, Food Chemistry. 62 (1998) 207-215

In the past, the research has been paid more attention to the design way and the mechanics property of the equal-loading joints, few to the residual stress.
The relationship among the plate thickness 2t, reinforcement height h, half width of reinforcement w0, weld toe radius r geometry parameters and the weld toe stress concentration coefficient Ktoe, the weld root stress concentration coefficient Kroot has been established: Ktoe=1+αr0.403th+t-1.031 (2) Kroot=th+t+β (3) where α，β are both the shape factors.
The physical and mechanical property parameters of CF62 can be seen in the reference [9] while the same parameters of stainless steel 316L can be seen in the reference [10]. 4.
In short, the thicker joint has the larger residual stress especially in the heat affected zone.
Simulation of 3D Residual Stresses Field of Multi-pass Welding by FEM, Journal of Mechanical Strength.

Integration of these materials into working devices requires precise control of surface properties.
These GXL properties allow tuning of liquid properties by inclusion of high pressure gases.
All other samples displayed an increase in dielectric constant by factors of 5-10, although sample thicknesses (~600 nm) and water contact angles were essentially constant before and after processing.
These studies suggest that photoresist and etch residue can be removed from low k MSQ films with GXLs without degradation of film properties, provided that a final high pressure CO2/CH3OH rinse is invoked for MSQ property recovery.
We demonstrated that moderate pressure liquids such as TMAHCO3/CH3OH expanded by CO2 (GXLs) can be used to effectively remove photoresist and plasma etch residues without significant degradation of low film properties, although a high pressure CO2/CH3OH rinse is required in order to fully recover the low k film properties.

Among these defects, warpage deflection is one of the most severe defects, which not only affect the part function but also its appearance.
The warpage deflection is generally caused by two factors, uneven cooling of mouldings within cavities, and inconsistent shrinkage of the mouldings.
Tables 1 and 2 show two such exemplar tables, where U7(73) in Table 1 represents an experimental design involving 3 variables (factors) with 7 levels for each variable.
This intuitively illustrates one of the most remarkable properties of UDE desirable to experimental design.
There are, of course, some other properties of UDE, including a few disadvantages over ODE.

It mainly because the strength of adhesion of the films is very strong and the strength of adhesion is the premise of various performance of the films.The coatings of Al have effective corrosion resistance, compare with the coatings of Al , the coatings of Cu have much better heat-transfer properties.
In the magnetic refrigeration machine, the property of heat exchange response to the efficiency of refrigeration.
The effective factors is that A is stronger than B and B is stronger than C.
The effective factors is that C is stronger than B and B is stronger than A.
(2) The adhesion between Cu and Gd is very bad and they are bonded together only by mechanical link.