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However, for the present, current study mostly focused on mechanical structure.
Table 1 Comparison of Subsurface Detection Technology Detection Methods Principle Advantage Defect Schematic Diagram GPR Dielectric properties, Electro-conductivity High precision, Wide range of application High-frequency signal attenuated severely, Accuracy is obviously influenced by antenna size.
The robot must not only detect voids, water, life forms in the soil, but also identify rocks, walls and other distractors.GPR can complete the detection of above objects, according to different dielectric properties.
Due to space restrictions in the exploration and rescue, volume become an important factor that affect the applications of subsurface drilling robot.
The power and stability of pulse source directly affect the detection range and accuracy of GPR.

Introduction Hard surfacing build-up is a method to deposit special material (metallic, ceramic or metallic-ceramic mixture) on a metallic part, using various welding processes, in order to change some superficial properties and/or dimensions.
The properties usually desired are greater resistance to abrasion wear, impact, adhesion (metal-to-metal), heat, corrosion or any combination of these factors.
This fact imposes to eliminate the heat affected area (HAZ) of ​​the substrate and to redesign the components as to continue the rehabilitation process for another three cycles of use.
Mehdi, Mechanical Properties of Bimetallic Weld Joint between SA 516 Grade 65 Carbon Steel and SS 304 L for Steam Generator Application, IJRET, Vol. 03, Issue: 07 (2014) p. 39-42
[4] Garleanu, D  ; Garleanu, G, Effect of Chemical Composition on Hard Deposits Properties in the Case of Weld Refurbishment of Heavy Crushing Hammers, Rev.Chim (Bucharest) 70, Issue: 2 (2019) p. 417-424

Kahraman et al [6] stated that the performance of a bit requires information from variety of sources which includes formation properties, operating condition and bit design analysis.
However, the major parameters affecting bit performance are the physico- mechanical properties of the rock.
The objectives of this work therefore, are to determine rock properties affecting ease of drilling, characterize the limestone formation and compare the performance of the different tri-cone bits employed.
Feridunoglu,: Dominant Rock Properties Affecting Penetration Rate of Percussive Drills, International Journal of Rock Mechanics and Mining Science, Vol 40 No. 2, (2003), pp 711 -723 [7] A.
Miller: Engineering Classification and Index Properties for Intact Rock, University of Illinois, U.S.

Microstructure and Electronic Properties of Al/Zr/LiNbO3 Multilayers D.
This layered structure promoted better mechanical strength and suppressed Al migration.
Above results suggest that the degree of Al texture is strongly affected by the underlayer thickness and the highly textured Al films are obtained when the underlayer thickness is in a specific region.
Effects of Zr underlayer on the x-ray diffraction intensity of Al (111) peak. reported that a film with a smooth surface exhibits a high effective SAW coupling factor, while a rough surface will enlarge the insertion loss of SAW devices [17,18].
The Electrical Property of the Films.

Fig. 1 - Block the way excavation The mechanical way affects the frozen soil by percussion or vibration method and is done by conventional digging/earth-moving machines as well as by specially-equipped machinery.
Fig. 2 – Drilling machine Scope of drilling is multifaceted: prospecting and exploration of mineral resources; investigation of the rocks’ properties; production of liquid, gaseous and solid (leaching and melting) minerals through the production wells; blasting works; extraction of solid minerals; artificial consolidation of rocks (freezing, grouting, cementation, etc.); drainage of flooded mineral deposits and marshy areas; development mining; laying down underground pipelines: the construction of pile foundations, etc.
However the primary aim of this article is to analyze the core drilling processes in more detail as my research work is based on investigation of the drilling properties of a core drilling machine. 
To move from one scale to another, as well as from standard drilling conditions to non-standard, there are correction factors and the generalized classification of rocks by drillability. 
Varanitsa, Design, calculation and consumer properties of machines for excavation: ChSU (2007) 127p. 20.

Nallusamy4 1,2,3Sri Venkateswara College of Engineering, Department of Mechanical Engineering, Irungattukottai, Sriperumbudur- 602 117, Tamil Nadu, India. 4SSN College of Engineering, Department of Mechanical Engineering, Old Mahabalipuram Road, Kalavakkam - 603 110, Tamil Nadu, India. 1rvivekmech@gmail.com, 2praghu@svce.ac.in Keywords: Diesel, Biodiesel, Spray cone angle.
Rakesh Sarin et al (2007) [4]Jatropha–Palm biodiesel blends: An optimum mix for Asia this study shows South-East Asian countries, blends of Jatropha and Palm biodiesel have been examined to study their physico-chemical properties and to get an optimum mix of them to achieve better low temperature properties, with improved oxidation stability L.M.
The experimental correlation for the spray angle was found as follows: tan (θ/ 2) = 0.15P0.017 ν -0.7 (1) It could be concluded that the spray angle is mainly affected by fuel viscosity.
A measurement of spray development for diesel and neat RO biodiesel fuel using the high-speed digital camera and engine rpm is 500, the differences in physical properties of fuels results in a higher injection pressure and narrower spray angle of biodiesel.
The influence of ambient pressure, ambient temperature, injection pressure, fuel viscosity and orifice diameter are the key factor for affecting the spray angle for diesel, biodiesel and its blends should be examined.

In actual assembly process, the assembly property not only depends on the shape and the size of the parts, but also closely associated with the tolerance and the assembly deformation of the parts and the tooling.
Assembly simulation based on physical deformation reconstruction model not only fully considers the resources and environment factors such as the fixtures, tools, ancillary equipment, and personnel movement information, using the products and resources to simulate the process according to the actual assembly process, but also the structural deformation of products in the assembly process, which more truly reflects the assembly process and optimizes the product design and assembly process by optimizing the path.
The simulation results of the assembly process based on the physical deformation reconstruction model is shown in Fig.5, the assembly deformation of the fuselage sidewall panels by the factors of gravity and temperature caused the interference and collision.
In the production process, there must exists the influence of such factors as temperature and gravity, so that the item is deformed, and thus there is a deviation between the theoretical geometric models, so the assembly process simulation based on physical deformation reconstruction model is more in line with the actual production conditions and more practical guiding significance to the assembly process design, further optimize the assembly sequence and assembly path, improve the product assembling, shorten the product development cycle.
[6] Yuan Li, Tao Zhang, Jian-Feng Yu Wei-ping He: Mechanical Science and Technology, Vol.3(2000), p.503-504

Liquids and solids have better thermal conduction properties than gases.
Every insulation material has different thermal properties and characteristics, and each behaves depending on the compound.
The main factor in the design variables is roof orientation [18].
Jamaludin et al. [20], understanding environmental factors such as design and building arrangements can make an indoor environment such as temperature.
Ulgen, “Experimental and theoretical investigation of effects of wall’s thermophysical properties on time lag and decrement factor,” Energy and Buildings, vol. 34, no. 3 (2002): 273–278

The geometry, finite element mesh, material behavior, element properties, and boundary conditions are the main features of typical FE models.
Material Behavior FE users need data and models to characterize the mechanical behavior of materials used to fabricate new products.
Constitutive models and their associated coefficients represent a new way to describe material properties, a way that can be used by FE users.
Anisotropy has been identified as a factor contributing to failure in materials.
Conclusion This paper describes the main microstructural features affecting the plastic deformation of aluminum alloys.

The interactions with target gas at the sensor surface cause changes in the mechanical, electrical, dielectric properties of the sensing coating deposited onto acoustic transducer.
The changes in these properties will lead to change in the velocity and amplitude of wave modes, which can be measured by a frequency change when the acoustic element is realized as a delay line or resonator.
Theoretical background Generally, the SAW velocity may be perturbed by a number of factors, each of which represents a possible sensor response.
Taking into account the effects of these perturbations, the velocity of the acoustic wave are affected as follows [6]: (1) Where cm and ce are the sensitivity coefficients for mass and elasticity, ρs is mass per area,μ and λ are the shear and bulk moduli of the film, K2 is the electromechanical coupling coefficient, σs is the sheet conductivity of the film (σs=σh, where σ is the bulk conductivity and h is the coating thickness), Cs is the capacitance per length of the SAW substrate material (Cs=εs+εo, the permittivity of the substrate and the free space, respectively).