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It is deferent from plastic or wood in structure, surface property and agglutination value.
The high- frequency electric current is created by ultrasonic generator and changes into mechanical vibration by energy exchanger.
The mechanical vibration makes the welding head vibrating in 15000Hz or more.
[5]Gao Y, Chen F B, Zhao Y F: Research on Factors Affecting Quality of Ultrasonically Welded Plastic. submitted to Aerospace Materials & Technology(2006) [6]Zhou Y S, Yan Y C, Dong Z, Jiang S Q: The Welding Process and Quality in Ultrasonic Welding of Plastics Part I Analysis of Joint Melting State During Welding.

With the guarantee of the model parameters and the properties of particles under the same condition, Frequency is 30Hz, amplitude is 0.43mm, and the filling time is set at 5s.
Table 5 Table of factors and levels Level Factor DOF A Vibration frequency B(Hz) Amplitude C(mm) 1 Z 20 0.28 2 XY 30 0.43 3 XYZ 40 0.57 The simulation process of solid and liquid flow is shown in Fig. 8.
Influence of vibration on the solidification behaviour and tensile properties of an Al-18wt%Si alloy[J].
Effect of mechanical vibration on Microstructure and mechanical properties of lost foam casting magnesium alloy[J].
Study on Microstructure and properties of aluminum (magnesium) alloy lost foam casting under vibration pressure.Huazhong University of Science and Technology( 2010)

The fuel properties found compatible with standards.
The Physicochemical fuel properties of coconut biodiesel were analyzed using equipment built on EN and ASTM standard methods.
Biodiesel feedstock, COCO physicochemical properties were analyzed following ISO and ASTM standards as shown it Table 1.
Whereas the decrease of SO2, NO and NO2 are due to the better fuel properties of coconut biodiesel [21].
Masjuki, Experimental evaluation of fatty acid composition influence on Jatropha biodiesel physicochemical properties J.

Metal foam has a unique combination of properties such as air and water permeability, impact energy absorption capacity, unusual acoustic properties, low thermal conductivity, good electrical insulating properties and high stiffness with very low specific weight [2].
According to German, higher temperatures induce sintering shrinkage, leading to less dimensional precision, but higher properties [8].
These defects would affect the mechanical strength of the strut.
The rheological properties of the slurry play an important role in the impregnation process.
The particle size and shape of the raw powder, the type and content of the binder, the ratio of solid and liquid content are among of the factors that affect the rheological properties of the slurry [3].

Thus It is very important to find low cost, scalable fabricated, high sorption capacity, high selectivity, excellent reusability, optimum mechanical properties, and environment friendly materials that could meet all the requirements needed to be used as an efficient sorbent to clean up spills and recovering the oil .
The physical properties of oil, such as density, surface tension, and viscosity, could also influence the sorption capacity and the retention behavior as well.
The physical properties of the oil at 25 ± 1 °C and a relative humidity (RH) of 25 % are given in Table 1.
Results showed that change in temperature and oil concentration were important factors in determining the sorption capacity of the fibers.
Study of sorption properties and comparison with other cotton fiber-based sorbents.

The mechanical factors of swelling soft rock There are internal and external mechanical causes for rock swelling.
The water content of natural swelling rock is one of the important factors in swelling potential.
The cemented status of mudstone is one of the key factors of expansion potential and development degree.
The worse the gelling property is, the stronger the swelling property is.
Therefore, there are two main factors in criterion: clay mineral composition and hydrophilicity of clay mineral.

This study involved six factors of comfort which is air temperature, average radiant temperature, air velocity, relative humidity, metabolic rate and clothes insulation.
Although the biological properties of each people are different, but there is an optimum degree of thermal comfort, where the percentage is in thermal comfort was the highest.
The course of work and labor productivity will be affected when employee had uncomfortable environment.
The following annoying and/or harmful work environment factors can occur in the workplace such as: chemical, biological or dust pollutants, noise, mechanical vibrations, electromagnetic field, static electricity, improper lighting and microclimate [7].
This is because of different weather factors that influence data collected.

The results of tensile properties show that the decrease rate of tensile properties of 2A12 aluminum alloy are accelerated by the coupling effect.
Especially in marine atmospheric environment, the structural components faces comprehensive corrosion effects of various environmental factors such as temperature, humidity and corrosion medium.
Five of them were applied to determine the tensile properties, one of them was used to identify the corrosion and fracture morphology.
Tensile Properties.
The coupling effect of corrosion and fatigue aggravates the decrease of tensile properties.

Table 1 presents their chemical composition and Table 2 shows their mechanical properties.
Monotonic mechanical properties of S355 steel Yield stress sy (MPa) Ultimate stress su (MPa) Young`s modulus E (GPa) Poisson‘s ratio n Elongation A5 (%) 357 535 210 0.30 21 Shape and dimensions of the test specimens are presented in Figure 1.
The theoretical stress concentration factor in the solid specimen under bending Kt = 1.38 was estimated according to the model presented in [2].
Whereas, in the heat-affected zone (HAZ) high fluctuations of hardness are observed.
The highest hardness and hardness differences were observed in the heat-affected zone. 2.

Dickinson et al.[6], in specific, observe the relationship between the dynamic electrical factors and the formation of the weld nugget based upon the pattern changes of the dynamic resistance.
In addition, researchers continue to examine the weld quality using the above dynamic factors[7,8].
In addition, a new input vector through comparison between remembered clusters and input pattern is distinguished, and the stability and plasticity problem is solved using a reset mechanism to learn without affecting the existing cluster.
Table 1 below showed the chemistry composition and mechanical property of TRIP.
Chemical composition and mechanical property of TRIP chemical composition mechanical property C Si Mn P yield strength [kg/mm2] tension strength [kg/mm2] Elongation [%] 0.08 1.00 1.47 0.008 40.0 60.5 33.7 Resistance spot welding machine using single-phase, 60-Hz alternating current with a pneumatic cylinder attached was used.