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The nonlinear, time-varying, fluid-solid coupling properties of the hydraulic servo system are considered.
In fault diagnosis, the threshold directly affects the diagnosis performance.
Hydraulic cylinder is a common type of actuator in a hydraulic servo system, which can convert the hydraulic energy into mechanical energy.
The adaptive threshold is related to the main factors including system input, output, disturbance and parameters drifting over time, which are taken into account for non-linear system adaptive threshold modeling (Hongmei et al., 2009).
Usually, the time-domain features include root mean square (RMS), peak value, kurtosis, waveform-factor, etc.

Introduction The structural property of fabric is one of the important factors which affect the mechanical properties of the final woven fabrics.

Introduction There are many factors affecting the bearing behavior of single pile, of which the variations are now mostly supposed to fit the hyperbola [1~5][10][11].It is the basis for design of pile foundation to determine the ultimate bearing capacity , so evaluating and determining it correctly and reasonably will influence the safety of the entire project and its cost.
Based on the previous researches, the paper analyzes the properties of traditional hyperbola method from the perspective of analytic geometry, derives the a more general form of hyperbolic equations in test pile fitting and discusses the method to determine the ultimate bearing capacity and the corresponding settlement based on the he maximum point of curvature in such hyperbolic curve.
Fig.1 Hyperbolic method in this paper Fig.2 Loading-Settlement curves of O’Neil piles The following is the simplified derivation of the hyperbola property: the coordinate of point O in the coordinate system of (SOQ) is (c,Qult); CS of (xoy) can be transferred into CS(SOQ) by the means of rotation and translation, which will not change the shape of curve.
Chinese Journal of Rock Mechanical and Engineering, 2008,27(6):1260－ 1269.

A single crystalline quartz was selected as the specimen material whose properties are given in Table 1.
Table 1 Properties of quartz crystal used in the experiment.
The volume of material removed by the impact of a particle depends on the kinetic energy of particle and the properties of the particle and workpiece materials.
Finnie [11] observed that the velocity and impact angle of particles are the primary factors for the erosion of brittle materials, and noted that particle size, shape, hardness and strength are also important.
Nozzle diameter, air pressure, jet impact angle and nozzle traverse speed are the most significant process parameters affecting the top groove width.

Several factors can affect the geometrical accuracy, such as the thickness of the blank, lubrication, tool diameter, and geometry of the part.
Temperature dependent material properties play an important role for laser transformation hardening.
For this study these properties were selected based on data derived from reference [7].
This confirms that the observed underforming is dependent on material properties as well as on the part geometry.
[5] R.W., Honeycombe, H.K., Bahadeshia, Steels: Microstructure and Properties.(2nd ed.), Arnold, London, 1995, pp. 83–114

Also, the testing temperature has a significant effect on the low cycle fatigue properties of TA29 titanium alloy.
The tensile properties at different temperatures of TA29 titanium alloy blisk forging are listed in Table 1.
(2) The testing temperature has a significant effect on the low cycle fatigue properties of TA29 titanium alloy.
The Low Cycle Fatigue Properties of Ti-31 Alloy[J].
Materials for Mechanical Engineering, 2014, 38(2):44-47.

However, the Ti-6Al-4Vhas poor shear strength that makes it undesirable for bone screws or plates and also has poor surface wear properties which tends to seize when in sliding contact with its surfaces and other metals.
Schematic diagram Table 1.Material properties of the knee joint.
This factor is important in the design of meniscus.
It has been found that there are two main factors that influence the contact stresses of the UHMWPE meniscus; the material of the meniscus andthe friction coefficient µoccurred on the contact surfaces between the femoral and meniscus implants and between the tibia and meniscus implants.
In order to improve the knee joint design, these two factors need to be considered.

The strength of concrete which is the most important property can also be affected by these pores [1].
For instance, Lian et al. [2] stated that the porosity of an internal structure could affect the strength of concrete.
Lian et al. [3] in a different study found that the characterization of mechanical capacity of porous concrete could be determined from the investigation of the compressive strength of porous concrete.
Besides, Sidney Mindess [4] stated that the total porosity and pore size distribution are the most importance factors which could affect the compressive strength of the samples.
This shows that the porosity affects the compressive strength.

Interfacial properties between tie and barrier layers have been investigated.
Introduction Multilayer films can be obtained by coextrusion process to combine several polymer layers with complementary properties.
Tie-layers are therefore employed to enhance optical and mechanical properties of the films.
Rheological properties of polymers have been studied in linear viscoelasticity.
Fig. 2 Linear viscoelastic properties of polymers at 230°C, (a) mastercurves of complex viscosity and (b) weighted relaxation spectra A contrast of rheological properties between barrier polymers and polyolefins was evidenced from these results.

The integrated production process including smelting, bubble, heating, forging, prepare heat treatment, eventually heat treatment, etc, among which more than procedure is the main process of forming forging, is needed to achieve final forging shape accuracy, and to eliminate forgings inner cavity, loose and inclusions defects such as one of the important process, directly affect the quality of products [1].
Forming process using shear friction model: Where: is shear friction factor, taking 0.3, is shear yield strength.
Dynamic recrystallization the volume fraction of expression: Where: the peak strain ； Dynamic recrystallization of critical strain expression: Dynamic recrystallization grain size model: Where: is temperature compensation strain rate factor； is the dynamic recrystallization to activate, is gas constant.
Large axle forgings special forging method [J].Journal of Chinese mechanical engineering, 2006, 17 (8) : 877-879
Metal forming complicated multi-factor volume dynamic coupling simulation model and application [J].Journal of thermal processing, 2008,37 (7) : 1-5