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As a result of the study, the physical and chemical factors of the bacterial carbonate mineralization process intensification in quartz sand samples were established.
The type of bacterial culture that exhibits the most active cementing properties - Bacillus pumilus (VKM B-23).
The cement stone system is a complex multiphase poly structural system, the durability of which is determined by various factors.
Shredah, Application of microbial biocementation to improve the physico-mechanical properties of sandy soil, Construction and Building Materials. 190 (2018) 861–869
Li, Influence of molding process on mechanical properties of sandstone cemented by microbe cement, Construction and Building Materials. 28 (2012) 238–243

Magnesium alloys are among the best light-weight structural material with a relatively high strength-to-weight ratio end excellent technological properties.
Magnesium alloys nowadays have drawn special attentions and interests of researchers working in automotive and aircraft industry [14-16] as they are among the best light-weight structural material with a relatively high strength-to-weight ratio end excellent technological properties.
When coupled with large and variable grain sizes, the HCP structure has in the past lead to less than optimum mechanical properties.
Conversely, increasing temperature has an adverse affect on mechanical properties [19].
Many magnesium alloys have been developed and continue to be researched and developed in an effort to improve mechanical properties.

To quantify the mechanical properties of these joints, tensile and short term creep rupture tests were performed at room and elevated temperatures.
These precipitations will deteriorate the mechanical properties of the joint [8].
Mechanical Properties.
Mechanical properties such as proof stress and tensile strength are within in the same order of magnitude as the properties of the parent materials (Fig. 5a).
Mechanical Properties.

Guan1, a, L.L.Zhu2, b, H.W.Lu3, c and Z.W.Wang4, d 1College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China aguanjl@bjut.edu.cn, bzhulili0216@163.com cluhongwei2003@163.com, dwangzhiwei19880303@126.com Keywords: cold-rolled steel; ELID grinding; surface hardness; surface morphology Abstract.
The wheel peripheral velocity, grinding depth as well as grinding fluid are the main factors during ultra-precision grinding.
But its low intensity, low hardness has become an important factor to affect the mechanical properties of cold-rolled steel.
Experimental conditions and processing parameters The chemical composition and mechanical properties of carburized cold-rolled steel are shown in Table 1.
Table 1 Chemical composition and mechanical properties of cold-rolled steel Material Chemical composition /% Mechanical properties Cold-rolled steel C Si Mn P S Cr Ni σb/MPa HRC 0.17 0.27 0.45 0.035 0.035 0.25 0.25 450 65～70 Table 2 Experimental device Device Machine tool MSG-612CNC-FA Surface Grinder（modified） Measuring instrument Harbin Measuring Tools Group 2205 surface roughness measuring instrument Image acquisition microscope -PanasonnicWV-GP460 ELID grinding conditions Grinding wheel cast iron bonded Diamond Grinding Wheel（W36,W5,W1.5） Electrolysis power Special DC pulse power supply Grinding fluid Special grinding fluid [3] Table 3 Grinding process parameters Process Coarse Semi-finishing Precisio ELID grinding conditions Wheel peripheral velocity /（m/s） 18 18 20 Radial

Various mechanical tests related to human biomechanics properties and responses are simulated using the finite element method (FEM) on the implants to save time and money.
Contact location and alignment between tibia and the femoral component are the crucial factors for prediction of medial and lateral tibiofemoral contact forces.
Various mechanical tests related to human biomechanics properties and responses are simulated using the finite element method (FEM) on the implants to save time and money.
NiTi (nickel-titanium) alloy are used in artificial ligament implant because of its combination of mechanical properties that include superelaticity, shape memory and corrosion resistance [54].
Experimental measurement and modelling analysis on mechanical properties of inudostapedial joint, Biomech.

Excellent mechanical properties are an advantage of these materials considering their weight.
Thermoplastics significantly change their properties with temperature.
These properties can significantly affect machinability of a composite.
Basic mechanical properties of polymeric and cellulose fibres in comparison to glass and carbon fibres are shown in Table 1 [8].
It was proved that a more positive geometry (owing to a larger rake angle) significantly influences all important factors.

Against molding defects of PA1010 injection molding products and influencing factors of the impact strength, the corresponding analysis was made.
Introduction Nylon(PA)1010 is a unique engineering plastics in China, has excellent mechanical properties, wear resistance, corrosion resistance, low temperature resistance and flame retardant properties.
From the injection molding process, the set of following parameters may affect the impact strength.
Conclusions The impact strength of PA1010 with inserts injection products is crucial，its influencing factors are related to the molding process，raw materials，molding equipment and product structure，etc ,In order to improve the impact strength of products，we need to integrate all factors in the production， combined and optimized these factors，to ensure the requirements of the product strength .
Defect analysis of plastic injection products[J].Technology information, In Chinese. 2008, 9:126~128 [6] Qiang Li.The influence factors of plastic impact test results[J].Plastics technology, In Chinese. 2008, 36(3) :6~78 [7] Yue Dong , Yilin Hu, Junlong Liu.The influence factors analysis of charpy impact strength[J].

The basic design ideas of load-bearing microcellular foam concrete product As the building load-bearing material should have a certain strength and good durability, meet the requirements of mechanical properties of multilayer masonry structure wall, in the precondition of ensuring good thermal properties, concrete strength can reach about 7.5Mpa, good compressive strength, impact resistance, crack resistance, low shrinkage, low water absorption, fire retardancy.
Bearing porous concrete products forming process of preparation factors influence, and related.
Fig. 4 Porous concrete preparation pouring unit Fig. 5 Load-bearing brick cutting free group Conclusion (1) microcellular foam concrete load-bearing thermal insulation products with better physical and mechanical properties and good thermal performance, is the ideal substitute of clay brick
(2) cement material mixed with a certain amount of, using blast furnace slag lightweight aggregate and the use of microcellular foam agent can make concrete index can be obtained on physical and mechanical properties of bearing products required
Effect of sulphoaluminate cement and Portland cement on properties of composite cement [J].

However, apparatus parameters could affect the MFL inspection tool’s ability to characterize anomalies.
There are a variety of factors that can affect the MFL inspection tool’s ability to detect and characterize anomalies.
They include, but are not limited to defect geometry, MFL apparatus itself, magnetic properties and test parameters such as velocity and stress.
Electromagnets allow the magnetic field strength to be adjusted as the tool encounters changing magnetic properties and wall thickness in the pipe.
Fig. 3 shows the effect of magnet height or length on the leakage magnetic flux density over the defect while keeping the other factors constant.

The affecting factors of the low-temperature activation were comprehensively expounded, such as precursor introduction method, preparation method, supporter pretreatment and catalyst structure.
However, those factors are the key to improve the low temperature activities.
The purpose of our paper is to sum up the present state of different influence factors.
All of them greatly affected surface properties and pore structure of the supporters, leading a promoting effect on catalytic activity.
Effect of SO2 and H2O on low temperature SCR behavior Affecting mechanism of SO2 and H2O.