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The mechanical properties of magnesium alloys are closely related to their microstructures.
Even if the initial content is identical, the different microstructures may be obtained under different solidifying conditions, resulting in different mechanical properties.
The size of grains is an important factor affecting the mechanical properties, the finer the grains are, the better plasticity of metal is, however, there are few reports about studying on the solidified process of magnesium alloy under different electromagnetic fields.
The key factor lies in the inherent characteristics of crystallic substances and the temperature distribution adjacent to solid and liquid interface during solidification.
When DC and magnetic field were applied, magnesium melt did not vibrate, thus the grain morphology were almost not affected by magnetic field.

However, the performance of the spindle/tool interfaces is one key factor affecting machining characteristics [1].
Under the action of the dynamic loads, the spindle/toolholder interface appears the properties of contact stiffness and structural damping, which can be characterized by some equivalent springs and dampers.
The material properties of the spindle and toolholder are shown in Table 1.
Table 1 Material properties of spindle and toolholder Young's modulus [N/m 2] Poisson's ratio Density [kg/m3] Coefficient of friction 2.06×1011 0.3 7.84×103 0.2 Generally speaking, the dynamic performances of the HSK interface are mainly determined by the low-order modes of vibration.
Wang: Mechanical Manufacture Technology (Tsinghua University Press, China 1989) [6] S.

Introduction In recent years, natural disaster occurred frequently and has seriously affected people's production and daily life.
In this paper, taking the humidity sensors of RS92 as the calculation model, we discuss the above problem using the CFD method[10], and the influencing factors on the solar radiation error include the reflectivity of the MEMS humidity sensors, solder reflectivity, substrate material and the thickness of the sensor.
By using CFD commercial software package Fluent, we get the temperature error caused by solar radiation heating varying with different influencing factors.
Thus, the relations between the SRDB of RH measurement and influencing factors are derived from Eq. (2).
Therefore, combining with the mechanical properties of the actual sensor structure, it is necessary to consider the influence of sensor thickness on SRDB in the process of optimization design of MEMS humidity sensor.

Based on my existing research results, every factor chooses two sub-factors.
Based on multifactorial factors, I did some orthogonal tests, and every performance index of water-proof adhesive layer needs testing 8 times.
(2)When the rubber bitumen waterproof adhesive layer is with 4.75-9.5mmgravel particle, it has better shear resistance and bonding properties.
(3)When SBS modified bitumen waterproof adhesive layer is with 9.5-13.2mmgravel particle, it has better shear resistance and bonding properties.
Mechanical properties of waterproof adhesive layer on concrete box girder bridge[J].

By incorporating natural zeolite powder into blended cement, the research aims to improve concrete performance and durability against environmental factors.
The properties of cement were shown in Table 1.
Table 1 Properties of cement S.No Description Results 1.
The properties are shown in Table 2.
The properties of coarse aggregate are shown Table 3.

Each grain is then considered in turn as an inclusion, embedded in a homogeneous equivalent matrix, the properties of which are obtained by averaging over all the grains.
Introduction During the thermomechanical processing of superalloys, dynamic recrystallization controls microstructure evolution and thus important aspects of the mechanical behavior in service.
Description of Grain Properties When deterministic evolution equations (i.e., with no stochastic terms) are used, all grains of the same age have undergone identical evolution and therefore have the same diameterand dislocation densityHence, all properties of the grains in the model are one-parameter distributions, and each grain is characterized by its age.
In [5], the effect of the distribution of the strain hardening parameter (related to Taylor factor) was studied.
For distributed properties, such as grain-size distribution, the model fails with fixed parameters but it can be successful if some model parameters (e.g. grain boundary mobility) are also reasonably distributed in comparison to neighborhood effects in the aggregate.

Introduction Asbestos have been widely utilized in building materials, especially to the applications such as fire blankets, pipe insulation, fireproof fabrics due to its great thermal and mechanical properties.
Experimental methods Asbestos contacting materials were prepared to obtain the standard properties of chrysotile in various building materials.
Asbestos detection box was made to measure the light intensity in a closed and dark atmosphere to exclude other factors as shown in figure 1.
It means that intensities of reflected light decreased, but did not affect optical property of chrysotile under this condition [5].
Small peak at around 430nm was not affected by both color filter and additives.

There are two groups of fissures in the rock mass and they weaken the mechanics properties little.
The bedding plane determines the mechanics properties of rock mass.
The mechanics properties of rock mass are determined by both fissures and soft rock.
The mechanics properties of rock mass are determined by both bedding plane and the fissures.
The minimum safe factors of various positions of Xishan Slope are shown in Table 5.

The output characteristics of HEFT is shown to respond very sensitively to changes in the electrostatic boundary conditions caused by the adsorption of ions, wetting by polar liquids, exposure to gases, or the piezoelectric polarisation due to mechanical strain.
Thus, it is necessary to research the properties of AlGaN/GaN HEFT-micro- cantilever accelerometer at various temperatures for exploring the potential of GaN/AlGaN HEFT at high temperature and showing the temperature-dependence on I-V characteristic and piezoresistive coefficient.
The carrier transport mobility rate affect current both in liner working area and saturated working area.
The primary factor to affect carrier transport mobility rate is several of scattering mechanism.
But the mobility μ play an important part to affect IDS and IDDS.

Some deficiencies were presented for both two-dimensional and slice model if multiple chips are deployed in one package: the models have difficulties in reflecting all factors.
Material properties and size information for every layer are shown in TABLE.I-TABLE.II, and (=1,3,4,…8) denotes thickness parameters.
Material properties and layer thickness of BGA TABLE II.
The main factor affecting the scale of FEA model is the geometry of solder ball, and some methods have already been put forward for simplification, such as replacing the solder balls with equivalent beams[4][12], degenerating the solder ball into column[10] or block[11] shape, etc.
Reliability Modeling for Ball Grid Array Assembly With a Large Number of Warpage Affected Solder Joints [J].