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Several authors studied the effects of the process parameters on the quality of the joints in terms of both metallurgical and mechanical properties.
In [10] the mechanical properties and the microstructure of mild still joints were analyzed as a function of toll rotational speed.
The mechanical properties of the welded joints were investigated along a direction orthogonal with respect to the overlapping line.
Conclusive remarks A preliminary analysis of the mechanical properties of friction stir spot welded butt joints was carried out in this study.
The effect of tool rotational speed on both welding forces and mechanical properties of the joints was investigated.

Introduction Ti6A14V alloy has comprehensively mechanical properties and is the most widely used Ti ally, especially in aviation and aerospace.
The main forming method of titanium alloy components is cutting, but titanium alloys are typical difficult-to-machine materials because of its exceptional physical and chemical properties.
The hydrogen content is the main influencing factor, the thermohydrogen treatment temperature effect is not obvious.
When the hydrogen content is no more than 0.1%, room temperature tensile properties of hydrogen infiltration Ti6Al4V alloy is no less than that of original Ti6Al4V alloy.
The introduction of hydrogen reduces the metal binding force between atoms, thereby affecting the elastic modulus of alloy [4].

Preliminary studies [3,4,5] indicate that using NMFs as reinforcing filler to prepare composites can not only improve the mechanical properties of composites but also reduce the environmental pollution and the cost of composites.
When NMFs content is 20 wt%, the NMP with particle size of NMFs less than 0.07 mm, has excellent mechanical properties, which results in a flexural strength of 68.8 MPa and a Charpy impact strength of 6.4 kJ/m2.
The composites of nonmetallic powder from waste PCBs (NM-PCBs), wood and PVC were prepared, and the physical and mechanical properties of the nonmetal-wood-plastic composites (NM-WPC) were studied [15].
Firstly, the study on the reaction mechanism of composites preparation should be strengthened to explore the reasons why the additional quantity and particle size of NMFs powder affect the properties of composites.
Secondly, a suitable coupling agent should be chosen to pretreat the NMFs, which will further improve the the interface compatibility between NMFs and matrix, and increase the mechanical properties of composites.

Fig 2.1 The results comparing of modifying when modifier is in best dosage penetration Fig 2.2 The softening point of modifying when modifier is in best dosage penetration Fig 2.3 The ductility of modifying when modifier is in best dosage penetration WARM MIX ASPHALT ROAD PERFORMANCE RESEARCH In order to minimize the factor that affects analyse the modification effects of modifier, this experiment used the same aggregate gradation.
Hot mix asphalt mix ratio design The experiment uses the aggregate whose physical and mechanical properties are set to meet the technical requirements in JTGE 42-2005 highway construction materials testing procedures [5], the forming gradation is shown in Table 3.1.
Some studies show that it is because colloidal factor of the SBR is less damage at low temperature, and the modified factors play their role[10],but the effect of epoxy curing agent has not been fully realized in curing time.
Conclusions Warm mix asphalt agent can reduce the mixing temperature, at the same time it can’t affect the performance of the asphalt.
Based on temperature and surfactant mix asphalt mixture design and related properties of [D]. ​​

Physical and mechanical properties of genies granite Table 1 and table 2 is physical and mechanical characteristic of genies granite which is on saturation conditions.
Table 1 Mechanical index of rock in saturation condition Index Density of rock sample (g/cm3) Compress strength (MPa) Elastic modulus (GPa) Deformation modulus (GPa) Poisson ratio Tensile strength (MPa) Average 2.68 63.6 17.9 22 0.2 4.98 Table 2 Resistance to shear shear(ing) strength of gneiss granite rock Index Coefficient of friction Angle of friction φ cohesion f' (°) (MPa) Average 0.87 41.0 9.6 In-situ geostress conditions in engineering area Geological investigation was carried out in this area in 2007 and in-situ geo-stresses were measured.
So it can prove that stress concentration after excavating is the main affect factor for rock burst in this tunnel.
Rock burst is one complicated geology phenomenon which is affected by many factors, for example in some place of rich underground water and more structure planes, rock burst is often restricted, which had been proved with rock burst from K10+830 to K11+023.
Therefore a synthetized criterion with considering several rock burst factors include underground water conditions, rock mass characteristics, geostress conditions and tunnel shape and excavation method and so on.

The nano-structured TiO2 is of prime interest owing to its high catalytic activity, enhanced mechanical properties as well as distinctive optical properties when compared to the bulk material.
One of the key factors that affect the performance of thin film prepared via sol-gel dip-coating method is the thickness of the film, which on the other hand is influenced by many other factors such as the viscosity of the sol, the number of coating layers, and the dipping rate [8-10].
In addition, the crystal structure and morphology will also be affected by the increment in coating cycle [11].
It can also be seen that the surface morphology of the coating is greatly affected by the number of layers.
Pongpom, Sol–gel preparation and properties study of TiO2 thin film for photocatalytic reduction of chromium(VI) in photocatalysis process, Sci.

Soundproofing of premises is one of the main factors determining the operational quality of housing and comfortable living.
Due to the developed porosity and relatively high content of interconnecting pores, cellular concrete has high acoustic properties: sound-absorbing and sound-insulating ability [4, 5, 6, 7, 8, 9].
The properties of such porous fillers when they are included in dry mixes provide a significant reduction in the thermal conductivity of the plaster layer, as well as its bulk density.
The quality of heat-insulating plaster mixtures depends not only on the granulometric composition of the aggregate / fillers, but also on the content of other additives, the presence of which significantly affects the final result.
Summary The advantages of acoustic materials based on the expansion of obsidian - a porous material, is in the unique combination of heat and sound insulating and structural properties, and they can be put in line with long-term building heat and sound insulating materials.

However, a MHP’s heat transfer performance is affected by many factors, among which, working fluid inventory has great influence on the security, reliability and frost resistance of its heat transfer performance.
Chiang etc. added magnetic-nano powders to the working fluid to enhance its flow and consequently improve the thermal properties, and their investigations showed when the input power is 60W, magnetic-nano powders can help enhance the thermal conductivity of the heat pipe by 60% [5].
In a word, working fluid inventory that is more or less than the appropriate amount will affect MHP’s heat transfer performance.
Conclusions For the capillary limit, which determines a MHP’s heat transfer capacity to a large extent, this study first established its mathematic model , upon which the factors that influence MHPs’ heat transfer performances are identified.
Bubphachot: Journal of Mechanical Science and Technology, Vol. 23 (2009), p. 2548-2554 [4] J.H.

The emphasis of experiment is shooting factor(well depth, dynamite), at the same time, the experiment of instrument factor and receiving factor has been carried out to choose the best shooting factor and receiving parameter.
The main interference wave affecting deep reflection is refraction, mutiple refraction, high apparent velocity, strong energy and long continuity.
To these problems, Some scholars at home and abroad have conducted research:[1,4]Applying three- dimensional seismic exploration locates geological structure and coal seam property affecting coal layers mining in the east of Lvliangshan foothill in the middle of shanxi province.
Fig.1 Topography and geomorphology in research area Fig.2 Low velocity zone of D4 point (2) The seismic geology condition of deep layers.The deep layers have been affected by reverse fault(F5) from Qinglong mountain and the reverse fault(F4) from Mengchen to zhangjia mountain.The depth of coal seam varies largely(range from 300m to 850m), and dip changes largely(reach 30-80°).
Test equipment and test scheme Test equipment.(1) Equipment and the choice of factors.instrument types: 428xl digital seismograph; record format;SEG-D; sampling interval;1ms; recording frequency band; whole bandwidth; record length; 2.0 s; playback record filter; decided by experiment.(2) The choice of observation system.receiving lines: 2 lines; arrangement manner: linear type; receiving channel number: 2*200; channel interval: 10m; excitation type of shot point: intermediate fired.(3) The factor of excitation.seismic source: high detonation speeded-up explosive cylinder, detonating electric detonator flashily, excitation of single well or multi well; the method of pore-forming: simple mechanical drilling, artificial water drilling, luoyang spade, pneumatic drill in bedrock exposed region in gully.(4) The factor of reception.geophone: 10Hz, 60Hz; composition forms: three poles cascade two poles and gather together Test scheme.(1) Position of experimental point.The experimental purpose

Study of Polysilicon Texture with Acidic Corroding Jianxiong Ye 1,a Fayun Zhang 2,b 1.Department of Mechanical and Power Engineering, Nanchang Institute of Technology，Nanchang Jiangxi Province，P.R.C 330029, China 2.
The aim of texture is to reduce light reflex so as to improve its optical properties; it is a fundamental work for solar cell energy conversion efficiency.
Texture morphology is observed with SEM and light reflex ration is detected by ultraviolet spectrophotometer (US). 1.2 orthogonal experiment scheme and experimental results As for polysilicon texture processed with isotropic acidic corroding, characters of it’s morphology and light reflex is affected by many factors, such as constituents of compound solution, reaction time and temperature, when the corroding speed is approximately 2 μm/min and corroding depth is about 4 or 5µm when temperature is kept in a constant value, the silicon cell performance can be more better and texture quality can be ensured to be more stable.
Table 1 Factor and Levels of Experiments Levels HNO3 [A/ml] HF[B/ml] NaH2PO4.2H2O [C/ml] 1 1 1 0 2 6 3 5 3 12 9 10 Table 2　Results of three factors and three levels in the orthogonal experiments Samples HNO3 HF NaH2PO4.2H2O Corroding speed [µm.min-1] Light reflex [％] 1 1 1 1 109 32.0 2 1 2 2 3.5 16.2 3 1 3 3 0.7 17.3 4 2 1 2 1.25 37.6 5 2 2 3 0.7 29.3 6 2 3 1 76 22.0 7 3 1 3 0.75 38.2 8 3 2 1 5 33.0 9 3 3 2 51.5 29.1 Original reflex rate of raw polysilicon chip is about 35%, it can be seen from table 2 that acid corroding can work properly and reduce reflex rate effectively, the lowest reflex rate in tests is 16.2%.
Application of artificial neural network in the study of material properties, Cailiao Daobao, Vol. 20(2006),p. 238-240,257 [8] Zhang wenxiu, Leug yee:Mathematical foundation of genetic algorithms, Xi’an : Xi’an JiaoTong University Press,2000