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The Drive Control System of Micro Logistics Electric Vehicle Jianbao Zhang1,a, Chunguang Lu 2,b and Chengqun Li 3,c 1College of mechanical engineering, Hebei United University, Tangshan，Hebei, China 2College of mechanical engineering, Hebei United University, Tangshan，Hebei, China 3College of mechanical engineering, Hebei United University, Tangshan，Hebei, China a623004486@qq.com, bjxlcg@heut.edu.cn, clcqts@vip.sina.com Keywords: Electric Vehicles, Drive Motor, Drive Position Abstract.
Not only because of the energy problem, but also for it’s many excellent properties.
Choosing the suitable motor is one of the important factors to increase the cost performance of all kinds of electric vehicles.
In addition, its speed is not affected by the limitation of mechanical commutation.
In rear traction is relatively small, however, there is small space inside [5], but it doesn't affect indoor logistics demand.

Comparing the welding tool with a cylindrical pin with the welding tool with a flat faced-pin (square profile) resulted in [21]: the maximum temperature is attained for the pin with square profile with positive effect over the stir’s plasticity; both the deformation and the plastically deformed surface are bigger by using the pin with square profile; by using the square profile-pin better mechanical properties are obtained.
The extents of the two regions as well as the grain-size spatial distribution within each are affected by the selection of the FSW process parameters (tool rotational and welding velocity, tool geometry, tool plunge depth, etc.) and the grain-size distribution within the weld greatly affects the mechanical properties of the weld.
The main areas resulted after welding are presented in Fig. 8: zone A – the base material; zone B – the heat affected zone (HAZ); zone C – the thermo-mechanically affected zone (TMAZ); zone D – the area of the weld seam.
Accurate and reliable numerical analysis of the FSW is still a very difficult task as the behavior of the FSW joints is influenced by different combined factors.
Safaee, Characterization of the Influence of Tool Pin Profile on Microstructural and Mechanical Properties of Friction Stir Welding, The Minerals, Metals & Materials Society and ASM International, 2014.

However, despite this it may be stated, at least at present, that arm pressure (P) and frictional force are the major contributing factors affecting wiping performance.
The value of the frictional force per unit length of the wiper blade (F) may be calculated according to the following equation: PF ×= µ (1) Major factors affecting the wiping performance are arm pressure (P) and frictional force (F).
These properties are similarly expected to influence the durability of the complete wiper system.
This suggests that lubrication conditions and wiping quality are correlated factors.
We have concluded in this study that the most significant factors that determine not only wiping performance, but also durability performance, are the friction coefficient and contact pressure distribution.

Friction tests facilitate the classification of the surface properties.
Modified Pin-on-Disc tests are conducted in order to classify the friction properties of the different surface conditions.
It should be noted that a number of factors that influence friction, such as contact pressure, relative speed and temperature are locally and temporally not constant during SPR.
The simulation makes it possible to analyse the entire theoretical range for the friction properties.
The maximum force will, however, depend on the friction properties.

The moisture damage of asphalt pavement is closely related to water erosion and freeze-thaw cycles, which may cause the deterioration of pavement properties of asphalt mixtures and affect the durability of asphalt pavement [5-8].
Their basic properties are listed in Table 1.
Properties Characterization of Asphalt Mixtures.
Effect of freezing-thawing and ageing on thermal characteristics and mechanical properties of conductive asphalt concrete, Construction and Building Materials. 140 (2017) 239-247
[11] Lan Wang, Gong Ningning, Yongming Xing, Studies on the Factors of Performance of Asphalt Mixture by Salt Freeze-thaw Cycling, Functional Materials. 47 (2016) 88-93

The presence of internal voids in the as-cast ingot may significantly affect the mechanical properties of final products.
Voids, developed during the solidification of a large cast steel ingot [2] and mostly found in the central upper ingot and in core regions along the central axis [3], are significantly affected.
The upsetting process was chosen because of the large deformation effects and consequent impacts upon the development of significant void closure factors such as triaxiality and macroscopic equivalent deformation.The latter is a technique aimed at increasing the width of a heated workpiece whilst reducing its length.
Throughout the actual upsetting process simulation via this software, thermo-mechanical fields are computed in a Lagrangian manner by implicitly solving the weak form of the balance and heat equations.
In order to account for specific high strength steel SF2000 material properties, adapted material constants , used in Eq. 4 and 5, were calculated using rational polynomials,function to the materials Norton exponent, identified and approved using curve identification algorithms.

Study of the Bending Stiffness and Cable Characteristics of Tension Components TANG Maolin1,a, DU Yaguang2,b, SHEN Ruili3,c,YAN Kun4,d 1Bridge Engineering Department, Southwest Jiaotong University, Chengdu Sichuan 610031, China 2Bridge Engineering Department, Southwest Jiaotong University, Chengdu Sichuan 610031, China 3Bridge Engineering Department, Southwest Jiaotong University, Chengdu Sichuan 610031, China 4Bridge Engineering Department, Southwest Jiaotong University, Chengdu Sichuan 610031, China atmllpl@126.com, bdyguang321@yahoo.cn, crlshen@163.com, dstefyk@163.com Keywords: Tension components; suspension cable; geometric shape; cable property; bending stiffness; tension stiffness; cable element; beam element.
Calculation results on a hollow beam verify that when tension increases, components’ mechanical properties gradually change from beam characteristics to cable characteristics and eventually they tend to be identical with the theoretical calculation of cable structure. 1 Introduction Bending stiffness has certern effects on force and deformation of tension bars, which is currently a research focus in structural Engineering[1,2].
Furthermore, analysis will be done to research factors affecting the cable-beam characteristic of tension bars. 2 Geometric shape equation solutions of tension components Including the impact of bending stiffness on tension members (Fig. 1), the equilibrium conditions of the micro-segmentation is ∑Y=0 dV- qdx=0, ∑M=0 M+dM-M+Hdy-(V+dV)dx+qdxdx/2=0, (2) Where we eliminate V and omitte higher order terms to get
(23) Mid-span deflection affected by rigid conditions is: ,

The selected parameters affecting the characteristics of turned parts are: workpiece properties (boundaries and length), cutting tool parameters (tool overhang and tool vibration) and cutting parameters (depth of cut, feed rate, cutting speed) [8].
A simulation of machining, in steps of 10 mm is given in Tab. 2 and a very small variation of dynamic properties of the workpiece is showed.
Results indicated that the feed rate is the only significant factor affecting the surface roughness.
The cutting speed and feed rate are the most influential factors on cutting time and productivity.
Claesson, Mechanical Systems and Signal Processing 11, (1997) 459-489

The most common titanium is the type two phase Ti-6Al-4V alloy among several alloying types of titanium, because of its good comprehensive properties[2].
The machine ability of titanium and its alloys is generally considered to be poor owing to several inherent properties of materials.
This machining technique is applicable to a wide variety of conductive materials irrespective of their mechanical properties, such as their hardness, strength, or toughness, etc.
The material properties of Ti-6Al-4V alloy are showed in Table 1.
However, the shape and size of crater is related to many factors such as discharge parameters, material itself, working fluid and discharge gap etc.

Mechanical properties Due to its superior mechanical property, the carbon nanotube composites are used in sensors and innuclear transportations.
The outstanding electrical property of nanotube compositesis mainly dependent on two factors such as diameter and geometrical property of the nanotube which are the major factors responsible for the fluctuation of the conducting and semi conducting behavior of the nanotubes [8].
The carbon nanotubes possess unique mechanical and thermal properties with higher stiffness and strength.
Mechanical properties of carbon nanotube/polymer composites, Sci.
Lorents, Mechanical and thermal properties of carbon nanotubes, Carbon, 33 (1995) 925-930