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Introduction Organic conductive polymers like polythiophene, polypyrrole, polyacetylene, polyaniline etc. have been extensively studied in last decades due to their extensive possibilities of application s based on their optical and electronic properties [1].
Due to various oxidation states, (PANI) has attracted considerable attention due to its specific electronic, thermoelectric, electrical and optical properties [2].
This is a favorable factor to have higher conductivity values. 5.
Summary The doping process induces structural and chemical changes in the host polymer matrix, which leads to the changes in optical and electrical properties significantly.
MacDiarmid, Optical properties of polyaniline, Polymer. 34 (1993) 1833-1845

Experts and scholars had carried out lots of research and achieved certain results in different fields, such as the cutting mechanism of composite materials, the design of material and structure of tool, special processing technology, factors that affect surface quality.
Influence of cutting process on the properties of the composite materials is the most significant content in the study of machining technology of composite materials [1].
Nowadays, carbon fiber reinforced plastic(CFRP) materials its application in the large aircraft of China's aerospace field and defense fighters and weapons because of its superior characteristic such as high specific strength and specific modulus and properties such as being designed and easy to integral shape in various kinds of composite materials.
At present, the methods of machining are still the traditional mechanical processing.
It is composited by carbon fiber as the reinforcement and resin as the matrix, and has a lightweight, high strength, high temperature resistance, corrosion resistance, excellent thermodynamic properties and other characteristics.

Glass fibre reinforced PA66 composite material has many advantages such as excellent mechanical properties, small specific gravity, superior electrical insulation performance and easy processing and melding [1].
Analysis of Forging Performance of Electric Power Fittings under Extreme Cold Conditions Forging process plan Through the study of the forging forming process of the CrMo trunnion hanging plate, the influence of the forging temperature (initial forging and final forging temperature) and the degree of pre-forming deformation of free forging on the structure and mechanical properties of the hardware is optimized.
Tensile mechanical properties data.
Research into impacts of extremely cold climates on properties of basalt plastic rods - sciencedirect.
Thermal comfort range and influence factor of urban pedestrian streets in severe cold regions.

Narayana Rao3,c, DVA Rama Sastry4,d 1Department of Mechanical Engineering, DMS SVH College of Engineering, Machilipatnam, India 2National Institute of Technology, AP, India 3Department of Mechanical Engineering, Osmania University, Hyderabad, India 4Department of Mechanical Engineering, KL University, Guntur, India atadepalli.ravikumar@gmail.com, bdirector@nitandhra.ac.in, cmehod.dmssvhce@gmail.com ddvarsastry@gmail.com Keywords: Passive, Semi active suspension controls; Magnetorheological dampers; skyhook, ground hook Abstract: The rail irregularities and wheel-rail interactions in a train running at high speeds may result in large-amplitude vibration in the train's car body and affect passengers by reducing ride comfort.
Hence, the vibrations of the railway vehicle are considered to be the main factor in determining the ride comfort.
Mrdr = - ( Fssztr + Fssztl ) + ( Fpsz3r + Fpsz3l ) + (Fpsz4r + Fpsz4l) …(7) I4Φ2 = (Fssxtr + Fssxtl)h2 + (Fpsx3r + Fpsx3l)h3 + (Fpsx4r + Fpsx4l)h3 - (Fpsz3r + Fpsz3l)v + (Fpsz + Fpsz4l)v …(8) I3δ = -(Fssytr + Fssytl)h2 - (Fssztr - Fssztl)m - (Fpsy3r + Fpsy4r)h3 - (Fpsy3l + Fpsy4l)h3 + (Fpsz3r + Fpsz4r)n - (Fpsz3l + Fpsz4l)n …(9) (b) EoM with MR dampers Four MR dampers were installed in secondary suspension in place of traditional viscous dampers as part of the research to see if the damping properties improved for ride comfort.
Since the objective is to achieve better ride performance parameters, which are affected by sprung mass acceleration, displacement and suspension travel of the system, these parameters are assessed for different currents of MR damper using skyhook (α=1), ground hook (α=0), and hybrid (α=0.85) control strategies.
Properties and Applications of Commercial Magnetorheological Fluids Proc. 1998 SPIE 3327, Smart Structures and Materials 1998: Passive Damping and Isolation (L.

The proposed method is general enough to be applicable to typical mechanical motion control systems that possess flexible joints and variable loads.
Due to usually has extremely large value distributing in very high frequency range, the affect of term on the dynamics is omitted.
and usually have extremely small values whose variation is not principle factor.
NLS optimization is employed for original parameter set identification due to its good asymptotic properties [6].
Dong: Chinese Journal of Mechanical Engineering Vol.46 (2010), p.135

Introduction Owing to its superior physical properties (wide bandgap, high critical electric field, high thermal conductivity), its rich polytypism (4H, 6H, 3C,…) as well as the possibility of epitaxially growing GaN heterostructures or graphene on top, silicon carbide is a material of choice for a wide range of strategic applications.
Emtsev, et al. , Nature Mater. 8, 203 (2009). ], the atomic scale structural properties of the interface (in particular the presence of the so-called C buffer layer [[] F.
Lett. 103, 246804 (2009) ]) strongly affect graphene doping and carrier mobility [[] F.
However, only RCtip and Rspr are related to the “local” electrical properties of SiC surface.
As an example, this method was extremely useful to understand the behaviour of Au/3C-SiC Schottky diodes [26], where defects in the material strongly affect transport properties.

Therefore, taking the economic and ecological factors into consideration, it is very urgent to promote the comprehensive utilization of tailings [2].
MgAlON is a new ceramic material with a spinel structure and excellent optical, mechanical and dielectric performance, high thermal stability and slag resistance [3,4].
SiAlON ceramic with low thermal expansion coefficient, high toughness and good thermal shock resistance, is a kind of high temperature structure ceramic with excellent properties [5].
Li, Mechanical properties and microstructures of hot-pressed MgAlON–BN composites.
Hong, Sintering property of MgAlON bonded composite materials.

Zaidib aDepartment of Engineering Mechanics, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Malaysia bDepartment of Mechanical Engineering, Faculty of Engineering, Universiti Pertahanan Nasional Malaysia, Malaysia norihan@uthm.edu.my, waluyo@uthm.edu.my, mujahid@upnm.edu.my Keywords: material constitutive model, projectile impact, finite element method.
Aluminium 2024 T3 is used as a material model of target plate and the material properties is shown in Table 1.
Table 1: Material properties of target plate Type of material Aluminium 2024 T3 Property of material Elastoplastic Young modulus, E 73.08 GPa Poisson ratio, n 0.33 Mass density, r 2700 kg/m3 Thickness of plate 2 mm Integration point 5 Yield stress, sy 0.35 GPa Hardening factor 0.1 Contact type Basic Contact factor 10.00 Contact friction 0.25 Type of failure Failure strain, f = 0.50 Constitutive Relation A theory of contact deformation can be used to relate normal contact force to deformation and subsequently to relate deformation to work done on the contact region by the normal force of colliding bodies.
Result and Discussion There are several parameters affect the deformation and penetration of aluminium target plate when subjected to the impact by a projectile.

Introduction Tool wear cutting state has direct affect on the quality and precision of processing mechanical parts, especially in the surface processing of the parts with high requirements[1].
AE are less affected by cutting condition and tool parameters’ variance, tolerate in environment disturbance and have high sensitivity.
In neural network, the initialization of the weights strongly affects the final solution.
When the factors of matrix change a little, their singular values change little.
These good features guarantee the robustness of the signal features represented by singular values, which meet the requirements of the properties in model identifying as feature vectors.

A standardized test to receive typical workpiece material removal properties according to its electrochemical machinability is introduced.
Independent from the mechanical properties of the workpiece material with this technology high material removal rates can be realised.
Furthermore it is a cold process so that no white layer or a heat affected zone is developing.
With this test for each machinable material typical workpiece material removal properties can be received depending on specific machining parameters like current density or electrolyte conductivity.
Summary and Outlook The standardized test established by Degenhardt [3] to receive typical workpiece material removal properties according to its electrochemical machinability has been presented.