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Introduction During the course of polymer flooding in porous media, polymer solution would be diluted by formation water, and it was stranded due to surface adsorption, mechanical capture, hydrodynamic trap and the interactions between polymer molecules[1].
For the polymer on surface of core particles, adsorption amount are affected by many factors, which are the types of polymer, molecular weight, degree of hydrolysis, salinity, rock composition, surface properties of particles, environmental temperature and so on.
Dynamic retention When polymer flows in porous media of reservoir, hydrodynamic trapping and mechanical capture would occur on the rock surface due to its pore structure and permeability heterogeneity[7].
It is generally considered that four mechanisms have caused the polymer retention, and they are surface absorption, mechanical capture, capture of fluid dynamics and interactions between polymer molecules[8].

If advantages of polymer materials, such as chemical stability, heat resistance, corrosion-resistant bacteria and mechanical strength be maintained, also need to overcome its disadvantages such as hydrophobic, membrane fouling, it is necessary to change the membrane hydrophilicity [5, 6].
Enhancing the hydrophilic of membrane will make permeable quantitative large, but high hydrophilic membrane will not only easy to dissolve, but also losing mechanical strength.
PAA is a hydrophilic polymer, and also a good membrane material with large charge density, and molecular weight, as well as prepared membranes with good mechanical properties through the cross-linked carboxyl.
PAA was blended with PVDF to modify PVDF membrane for the first time, the factors that affected the performance of PVDF membrane were investigated, and then the technical parameters were made certain, hydrophilic PVDF flat ultrafiltration membranes were prepared successfully.

By testing heat transfer coefficient of four kinds of masonry walls, different aggregate type, masonry unit type and insulation material which affect thermal performance of masonry were studied.
Research on thermal properties of self-thermal insulation concrete block from construction waste[C].
Research on mechanical and thermal performance of composite heat preservative concrete block [J].
Utility Model Patent, No. 3394918, State Intellectual Property Office of the People’s Republic of China, 2014. ]were produced by ourselves which were composed of dry concrete using particular devices and large amounts of researches have been done on strength characters and shrinkage of blocks previously [[] X.X.
Analysis of influence factors of compressive strength of concrete block [J].

In this context, here we initially focus on phenomenological relationships between bone structure, its mechanical properties and most frequent damage mode, to achieve optimal properties of engineering materials for successful clinical bone replacement.
Microstructural parameters (density and porosity) and mechanical properties (Dynamic Young´s modulus and Yield Strength) for CP Ti cylinders with radial gradient porosity.
In regards to mechanical properties, it must be noticed that Vickers hardness decreased when porosity was increased (from core to outer shell).
Microstructural parameters and mechanical properties for CeO2 pellets with radial graded porosity.
Katsura, Mechanical properties of (U,Ce)O-2, Journal of Alloys and Compounds 271 (1998) 697-701

The comprehension of microstructure formation during casting of these alloys is fundamental for the design of suitable tribological properties and much research has been devoted in order to better comprehend the distinct morphologies obtained by the monotectic reaction.
Some factors affect significantly the microstructure evolution of monotectic alloys, such as temperature gradient (G), growth rate (v), concentration gradient, melt flow and natural convection [6].
Microstructural features such as the interphase spacing (λ) and the relation between diameter and width (d/w) of Pb-rich particles may be correlated with the aforementioned factors.
The focus is to produce components with a compromise between microstructural arrangement and good mechanical properties.

For example, Ringeisen et al [9] studied formation and properties of the Cu/Si(111) interface.
The results indicated that interface mixing was fairly easy to happen and the incident energy was the most important factor to affect the film growth modes.
Embedded Atom Method (EAM) with its empirical many-body potential energy functions has been used to compute static and dynamical properties of metallic systems such Au, Cu, Ag, Pt and their alloys [17].
The vector is the wave factor defined in the (100) and (111) planes, respectively, ,
Fig. 11 Structure factor depends on incident energies with cluster sizes on the different crystal orientation substrates: (a) Si(001);(b)Si(111).

Given that, the properties of the entire tool or machine parts are affected by heating the surrounding medium to elevated temperature [7].
Higher hardness of A sample (1181HV0.3) compared to B sample (1060HV0.3) is the main factor for higher resistance of A sample.
In fact, increased load caused higher stress and such stresses resulted to higher mechanical damage [14].
This factor either causes further weight loss in these samples.
However, the samples with wearied white layers are not affected. 4- Wear mechanism in plasma nitrided samples in ambient and elevated temperatures is spalling and abrasive.

In fact, studies [1,5] have brought attention early on to severe reduction of mechanical properties caused by the ageing process of specific resin matrices used in composite reinforcement materials, or, even more perilous, their exposure to extreme conditions of temperature.
This is because a number of factors make it advantageous as the choice of restoration materials: among others, the growing attention to reversible and compatible materials, the easy application of fibre reinforcements, and their light weight.
Within this preference, Fibre Reinforced Polymers (FRP) have proven to lose mechanical properties [4, 8] during the ageing process or due to prolonged exposure to elevated temperatures.
The results of these previous experimental campaigns have lead the authors to a new research question on how the ageing process of mortar, commonly used in reinforcing techniques such as Fibre Reinforced Cementitious Matrix, reinforced plaster and Reticula [3], may affect the structural behaviour of the fibre itself.
The flexural strength of the MX mortar specimens was considerably higher than the lime and cement mortar prisms, as was to be expected given the reinforced nature of the mortar itself and the high mechanical characteristics of the PBO fibres.

Introduction As the most important mechanical components, the axle box bearings are widely used in the train.
The bearing failures will lead to abnormal vibration and noise and may even lead to train accidents, causing great property losses and casualties.
It is good at dealing with nonlinear complex small samples as a result of its better generalization ability [5], but the classification accuracy of SVM is affected by the difficulty to select optimal parameters.
According to structural risk minimization principle, (6) is equivalent to the optimization problem (7) where is slack variable and C is error penalty factor.
In this paper, eighteen feature parameters are selected, including five dimensionless statistical parameters: Kurtosis Value, Crest Factor, Clearance Factor, Impulse Factor, Shape Factor; five frequency parameters: Centroid Frequency, Mean Square Frequency, Root Mean Square Frequency, Frequency Variance, Frequency Standard Variance; eight wavelet parameters: the eight band energy values by decomposing the signal with 3 level wavelet packet.

Results revealed that the dynamic behavior of the pipelines is strongly affected by slug parameters.
LOF as it clearly elaborated in the guideline of avoidance of vibration induced fatigue failure in piping systems [13] depends on the fluid kinetic energy (ρv2), support arrangement, Flow vibration factor Fv, and Fluid Viscosity Factor FVF.
Case UG (m/s) Ul (m/s) Um (m/s) 1 4.219 0.502 4.721 2 4.219 1.003 5.222 3 4.219 1.505 5.724 The standard physical properties for air and water at 25 Co were used and properties of the carbon steel pipe are shown in Table. 3.
Carbon Steel Properties.
Property Unit Value Density kg/m3 7800 Young Modulus GPa 206.8 Poisson Ratio - 0.285 Results and Discussions Maximum Principal Stresses.