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The high-frequency magnetic properties under temperature effect have been studied.
The fillers play an important role in determining the absorption properties of composites.
It is necessary to know the EM characteristics of the original fillers in order to predict the properties of the composite material.
It is well known that temperature is the most important factor that can change the properties of fillers during to operation of the microwave absorbing composite.
Pullar, Hexagonal ferrites: A review of the synthesis, properties and applications of hexaferrite ceramics, Progress in Mater.

In high speed intermittence cutting, the periodic changes in cutting force and centrifugal force affect directly machining stability and the reliability of cutter [3, 4].
High speed milling cutter with indexable inserts is being applied widely, and takes on excellent experiment and demonstration property.
(17) Based on Eq.12 ~ Eq.16, The number of cutter teeth participating in cutting, the rake of cutter, and cutting parameters are important factors affecting the total amplitude of vibration in high speed milling cutter, and the cutter with uneven distribution teeth creates less impact and vibration for process system as the energy is more dispersible.
Conclusions Distribution of cutter teeth and precision of dynamic balance affect directly the vibration and reliability of high speed milling cutter.
Xiao: Chinese Journal of Mechanical Engineering, Vol. 42 (2006), pp. 46

The influence of temperature above 100℃ on concrete is apparent: besides the degradation of material strength which is usual for high temperature, decomposition of materials within concrete, phase change and moisture movement within concrete will seriously affect the mechanical behaviour of concrete everywhere.
Mechanical behaviour is the major factor determining the bearing capacity of a concrete structure under room temperature.
This model is essentially a chemical-hydro-thermo-mechanical model.
Constitutive equations for the mechanical response of the solid phase.
F., Concrete at High Temperature: Material Properties and Mathematical Models[M].

For example, the assembly force affects the characteristics of the contact interfaces between components.
Also, operating temperature is one of the key factors that affect fuel cell performance.
The dimensions and mechanical properties of the components are listed in Table 1.
Table 1 Dimensions and mechanical properties of components in the single fuel cell.
Gong: Journal of Mechanical Engineering, (2011) No.8, p.158.

Introduction Anisotropic material property is required for drawing sheets.
Texture analysis of the hot rolled drawing sheets In some technological conditions, hot rolled sheets product the strong original textures to change its next process orientations and indirectly affect their final mechanical properties.
Seen in the φ1=0 º ODF sections (Fig.1a, 1b), the most unfavourable textures are {112}<110> and {223}<110>, their density levels are great than 5, severely affect sheet's drawability.
The blank size is φ120mm×3mm and its friction factor is 0.2.
Adjusting hot rolled process to reduce the unfavourable anisotropic property will be available to improve the sheet's drawability.

The current methods are mainly qualitative methods, which could not point out the factors that affect the system safety and its extent.
It is necessary to consider various factors for complex system such as cranes.
The factors are taken down layers compared with each other basing on the factors up layers, and then comparison matrix is structured.
With consistency test, the weight values for each factors are calculated[2].
With the experts evaluate on various factors of each layers, evaluate importance of evaluation factors on all layers by fuzzy value of the Table 1, then calculate the weight values of each safety factors by Equ.2, form the Table 2 ~ 6 as follows.

Tailoring the properties of magnesium by forming new alloys or new structures has been the focus for a number of investigations [1–4].
These distinctive features make it possible to fabricate materials with novel microstructures and properties [16,17].
Limited grain growth offers mechanical property advantages related to the finer grain size of parts made from powders [20].
Hardness may not be give complete picture of mechanical properties.
The sample size was too small to get any other mechanical properties such as tensile strength, fracture toughness.

Generally, the desired service life of many aircraft structures beyond twenty years, for these applications, residual stress relaxation in room temperature become a significant factor in limiting the beneficial effects of cold expansion.
Material properties Specimens were made from aluminium alloy 7050-T7451.
Fig.13 Tangential creep strain at hole edge Fig.14 Residual circumferential stress at hole edge relaxation for 20 years According to the results presented in Fig.11~14, it can be indicate that the initial value of residual stress has affected the creep rate predominantly, on the other hand, the residual stress relaxation was primarily due to creep.
References [1] SUN Xuan, WANG Min, XU HongChang: Mechanical Manufacture.
(In Chinese) [2] YANG HongYuan, LIU WenTing: Journal of Mechanical Strength.

Fabrication of Ultrasound-Gravity field flow fractionation devices using engraving machine and reliable sealing method Hai-yan Yin 1,2,a, Chun-cheng Zuo 1,b, Hong-yan Shi1,c 1.College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China 2.
Among them, PMMA is the one of the most applications because of its low cost, stable mechanical properties, good optical transparency, easy fabrication and non-toxic characteristics.
Compared to the conventional bonding methods, this method can increase the effective bonding area, reduce channel deformation. 2 The principle of separation of the particles in the Ultrasound - gravitational field In the ultrasonic standing wave field, the micro nano-particles are mainly affected by two forces in the vertical direction of flow of the carrier medium, the acoustic field radiation force Fac and settlement force Fsed, compared with these two forces, other forces can be negligible.
First of all, set pressure at 1.5MPa and time at 15min, selected temperature at 70, 80, 90, 100, 110 ° C for single-factor experiments.
In order to ensure the structural integrity of the polymer substrate, we proposed a low-pressure sealing technology and selected pressure at 0.8, 1.0, 1.5, 2.0, 2.5 Mpa separately to conduct a single factor experiment.

Diamond is considered a very attractive material for thermal spreading because it exhibits the highest thermal conductivity (20W/cmK), tolerance of high temperatures, chemical and mechanical stability [2].
The highly rough surface of the MCD films is the main limiting factor in the use of diamond films on most electronic, optical and especially thermal applications.
However, because of extreme hardness of diamond the mechanical polishing is a difficult and time-consuming procedure [3-4].
However, the grain sizes of the order of nanons which leads to high density of grain boundary greatly affect the thermal efficiency of NCD films [6-7].
Effect of activated hydrogen etching on surface roughness and optical properties of diamond films [J].