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., Ltd. for a 11910 face return air drift mine for the study of the background, using the finite difference software (FLAC) simulated roadway excavation and shoring, anchors through simulation analysis supporting roadway network cable and rock deformation stress distribution, simulation results show that the design of the anchor mesh-supporting design a good change of rock mechanical properties, enhanced adhesion of rock, effectively inhibited the expansion phenomenon, so that the stress distribution roadway more reasonable engineering practice shows that after verification and simulation to determine the support scheme is feasible.
SUPPORT SCHEME AND THE MODELING S Design protection.Lane is the roadway, consider the impact of mining when mining face, the pressure roadway, roadway span roof lithology and other factors, refer to the original support form the mining side, 11910 face the wind drift back to supporting the form: "network + anchor + anchor + steel ladder "composite support method.
Consider the factors affecting the face and the dynamic pressure recovery and mining, the actual situation, anchor length L = 2.2m, diameter choose d = 20mm, bolt spacing to take 0.8m, pitch to take 1.0m; consider the changes in coal seam roof soft rock, identified as the anchor length 7.3m, choose a diameter of 17.8mm strand anchor; metal mesh prepared using wire used on the 10th.
The simulation results indicate that the support scheme a good change of rock mechanical properties, enhance the cohesive force of rock, effectively inhibited the expansion phenomenon, so that more reasonable stress distribution roadway, and the map 4 can visually see the anchor role on the roof of the suspension, good control of the tunnel roof abscission occurred.

The Study on Surface Defects on the Machined Surface in High Speed Milling of Sicp/Al Composites Zhou Ming 1, a, Wang Yangjun1, 2, b and Jin Xiang yang2 1School of Mechanical and Electrical Engineering, Harbin Institute of Technology, Harbin 150001, P.R. of China 2 School of Light Industry, Harbin University of Commerce, Harbin 150028, P.R.
Introduction Mechanical and physical properties of particle reinforced metal matrix composites such as high specific strength, stiffness and wear resistance indicate that these materials play an important role in application for aerospace and automotive engineering components.
The results showed that the cutting speed and feed rate were considered to be main affecting factors and the machined surface is not totally formed by the cutting tool.
Table 1 Machining conditions used in the experiment vc(mm/min) fz(mm/z) ap(mm) 150 0.01 0.05 150 0.05 0.01 150 0.1 0.1 300 0.01 0.1 300 0.05 0.05 300 0.1 0.01 450 0.01 0.01 450 0.05 0.1 450 0.1 0.05 Table 2 Factors and levels of cutting parameters Factors Levels 1 2 3 A: fz（mm/z） 0.01 0.05 0.1 B: vc（m/min） 150 300 450 C :ap（mm） 0.01 0.05 0.1 The types and formation mechanisms of the surface defects The superficial holes formed by the pulled-out Particle.
(3) The cutting speed is the dominant factors affecting the number of pulled-out particles.

Car’s Materials Acoustic properties test and analysis Yan LIU1,a, Xiaojuan ZHANG 2, Zongcai LIU3 1 Institute of Transportation Engineering , Dalian JiaoTong University, China 2 Department of Mechanical Engineering, Dalian Institute of Science and Technology, China a ly@djut.edu.cn, bdalianxiaojuan@163.com Keywords: car material, noise testing, Acoustic properties.
Car noise and transmission Car noise which is impacted by many factors is a combined noise.
Conclusions 4.1 Car interior noise is the important factors that affect the car driving environment. 4.2 The PU material can effectively reduce the influence of engine noise on the car; Polypropylene felt material can effectively reduce noise from the chassis; PET material’s sound absorption performance is poorer in medium and low frequency while sound absorption performance is good in high frequency; Sound-absorbing cotton material can effectively reduce the influence of high frequency; Composite materials can effectively reduce the chassis noise and transmission noise; Cotton textile materials can effectively absorb the high frequency to Improve interior noise. 4.3 use acoustic damping materials is one of the effective methods to reduce interior noise.

Problem was better solved to quantitative of the multiple factors.
Work flow of selection system According to the requirements of mechanical design, the type code of rolling bearing was chose mainly on the basis of bearing load conditions (size, direction, properties), speed and installation size in the selection process for user.
Through analyzing the influence factors of the bearing selection, the weight distribution for influencing factors of a variety of bearing was determined.
And they were load size, direction, properties, speed, size limit, life, lubrication mode.
Quantified value will directly affect the optimization results.

Eight factors are investigated with the orthogonal label.
The factors affecting stress field are materials model, constitute equation, yield criterion, element type, element size and contact algorithm [4].
In the simulation, the material factors are fixed, whilst these factors are often waving during sheet metal fabrication.
The sheet metal material properties can be varied in a range owing to the rolling conditions variation.
In this case there are seven 3-level factors and a two-level friction factor.

The method of improving precision of micro injection molding machine temperature control Tang ShengDe1,a, Xu Hong*1,b, Wu Daming2,c, Zhang Yajun2,d 1College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China 2Engineering Research Center of Polymer Processing Equipment, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China atsd123@126.com,bxuhong@mail.buct.edu.cn,cwudaming@vip.163.com,dzhyj@mail.buct.edu.cn Keywords: Micro injection molding machine; Temperature control; Gradual approximation control; Control accuracy Abstract: the temperature control accuracy of polymer melt is the main factor affecting quality precision of final products.
Temperature control which is an very important control parameters as well as shear rate and pressure control directly influence the final product properties, appearance quality and plasticizing quality in the injection molding process.
Measuring and Control principle of precision micro-injection machine We can see from figure 1 injection process of micro injection molding machine compared with conventional injection molding machine require more accurate physical parameters measurement and more rapid, accurate dynamic feedback control for control variable[8,9]. 2.2 Methods of micro injection molding machine temperature control Temperature control is a very important control parameter in the polymer injection molding process, because temperature control is same as shear rate, pressure control, which directly influence the mechanical properties, appearance quality and plasticizing quality of final product. 2.2.1 The traditional PID control PID (Proportional Integral Differential) control, which is the most widely used, constitute a control volume through the linear combination of the deviation (P), Integral (I) and Differential (D), and The control law is as follows[10]:
(1) Where e(t) is control deviation, r(t) is the set value, c (t) is the measured value, KP is proportionality factor, Ti is integral time constant, Td is differential time constant.
Research on the analysis of influencing weight repeat precision of injection products factor[J].

After the adequate mastery of the soil layer structure, the physical and mechanical properties and the determination of the calculation parameters, the engineering software of FLAC3D and the numerical analysis method are utilized to analyze the integral stability of the tailing dam of Guangxi Xinfa Aluminum Company in Jingxi county.
The main of factors that affecting the stability of tailing dam is dam slope ratio of dam , materials of dam, buried depth of the foundation of tailings dam, mechanical parameters of the pond mud and the hydrogeological conditions[1].
The sort of rock and soil is more ,the properties change greatly.
Numerical simulation of the stability of the dam of tailing pond When the dam of the tailing pond is built in stone, the factors which influence the stability of the dam are singly slope rate, thickness of dam body, the depth of dam foundation etc.The theory of plane strain is used in the process of the numerical simulation and different depth of the dam and slope rate is considered.

The hydrophilic character of the PES membrane significantly increased and the mechanical properties were greatly improved.
As shown in Fig. 2, the pores of the membranes were not significantly affected after surface modification (after treating the data using ANOVA: single factor test).
The mechanical properties of the membrane samples were analysed using a Universal Testing Machine (UTM).
The improved mechanical property could result in better durability of the membrane as filter medium.
Conclusions Polyethersulfone was successfully modified via coating with PDA and deposition of antibacterial Cu2+ metal on its surface forming a membrane composite (PES/PDA/Cu2+) with enhanced hydrophilicity and good mechanical properties.

Al-alloys with particulate reinforced composites are attractive because of their enhanced tensile strength and stiffness [2], an excellent fatigue properties [3-4] compared with unreinforced counterparts.
The experimental studies on diffusion welding are focused commonly on the tensile and hardness properties [5] and welding parameters [6] for the dissimilar materials.
Samples were joined by DW method under various welding parameters and mechanical and microstructural properties of weld interfaces were examined to find out the most suitable welding parameters for better mechanical response.
Schematic illustration of diffusion welding equipments Results and Discussion Temperature is one of the most important factors in diffusion welding technique which strongly affects the joining characteristics of the diffusion welded parts.
However; it can be said that WC particles can be affect the diffusion process.

Based on a number of studies [3, 4] showing that spray flow (A), spray distance (B) of Oxygen/Propane (C) ratio are the main factors affecting coating quality.
The curves in the hierarchical chart represent the change in impact dynamic of factors affecting the porosity of the coating.
Results from Table 8 show that the degree of small error, they show that the factors affecting the study are the main factors affecting the porosity of the coating and they are statistically significant with It is highly reliable because the P value obtained is <0.05.
Calculating the percentage effect of factors based on Table 8, we have: Spray distance is the biggest factor affecting the porosity of coating with 69.4%, Oxygen / Propane ratio is 17.5%, spray flow is 12.9% and as it is illustrated in a chart in Fig. 4.
Baum, HVOF-Sprayed Alloy IN718 - The Influence of Process Parameters on the Microstructure and Mechanical Properties, in: Thermal Spray: A United Forum for Scientific and Technological Advances, C.