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Therefore it is important to explore the effect of environmental factors on material properties of polymer in achieving high performance of the materials.
The other is the effect of moisture factor on mechanical properties of the material, such as elastic modules, strength, percentage elongation and pliability of material.
Two aspects above are fundamental in studying the effect of moisture on material properties and affected mutually.
The former, i.e. the change of molecular microstructure results in the change of mechanical properties of the material Based on experiment results, the effect of moisture on material properties is analyzed as below.
Lu, Analysis of experiments on mechanical properties of thin films, proceeding of the 3rd international conference on experimental mechanics, Beijing, Otc.15-17, 2001.

According to the geological and mining conditions, the scale, shape and regularity of the potential crack areas in the coal goafs, separated overburden strata, and the influencing factors which affect the deformation foundation of architecture and stability are studied.
For these factors such as different mining period, different mining methods, and complex geological structure, the ground of the subsidence areas are not uniformly stable, and many building foundations in these areas are always cracked and damaged, which cause great threatens to the safety of people’s life and properties, and restrict the local economic development[1,2].
According to mining faces, roadways and the production of the mine, the faults and wrinkles are two factors that affect the geological structures; especially the fault structures are more complex, so the fault condition is one of the important factors to evaluate the stability of the overburden strata.
Analysis and evaluation of the building foundation’s stability The factors that affect the stability of the building foundation in coal mining subsidence area are the new and old gobs, residual coal pillar, fractured geological structures in coal field and axis fold etc.
The factors that affect the stability of the building foundation in coal mining subsidence area are the new and old gobs, residual coal pillar, fractured geological structures in coal field and axis fold etc.

Scratches reduced fatigue lives by factors up to 22 and LSP restored 74% of pristine life.
The mechanical properties of the substrate material are given in Table 1.
Table 1: Typical mechanical properties of clad 2024-T351 [9] Material Young’s Modulus [MPa] Poisson’s ratio Yield Strength [MPa] Ultimate Tensile Strength [MPa] Elongation at Fracture [%] Al 2024-T351 72000 0.3 360 481 19 Test Sample Design.
The model used linear elastic material properties and stress intensity factors (SIF) were calculated using the modified virtual crack closure technique (VCCT) [12].
Mechanical scribe damage reduced the fatigue life of 2 mm thick 2024-T351 aluminium by factors up to 22 compared to pristine material. 2.

Effect of Powder Loading and Binder Materials on Mechanical Properties in Iron-ABS Injection Molding Process N.
In this study, the effect of powder loading and binder content on the mechanical properties was investigated experimentally.
Currently, application of FDM required an enhanced and higher mechanical properties toward rapid manufacturing.
Results will be presented for mechanical properties including, tensile, flexural strength and hardness.
Akinci, Mechanical and Morphological Properties of basalt filled Polymer Matrix Composites, Sci.

Large amounts of papers indicate that the substrate temperature is one of the factors that affect the preparing of CVD diamond with high qulity.
Chen, Mechanical Properties of Diamond Thin Films Characterized by Nano-indentation Method, Journal of the Chinese Ceramic Society, 33(2005)(12):1539-1543
Sussmann, Optical, thermal and mechanical properties of CVD diamond, Diamond and Related Materials, 9(2000):1726-1729
Yang, Nano-hardness Techniques and Its Applications in Mechanical Property Measurements for Surface Engineering, China Mechanical Engineering, 13(2002)24:2148-2151
Wang, Optical and electrical properties of different oriented CVD diamond films, Applied Surface Science, 252(2006):8239–8242.

Laser power, scan spacing and layer thickness are considered the most critical factors.
Printing direction must be planned in order to match the desirable mechanical properties.
The type of material and internal porous architecture affects directly the tissue response for the implanted scaffold, in other words, material’s composition, internal structure and mechanical properties must match the target tissue to recover [57].
Populating scaffolds with growth factors, osteoinductive substances might represent a promising feature to enhance bioactivity properties.
The use of biomaterials, nanotechnology and growth factors show promising results for bone tissue regeneration.

Using this foundry technology, the casting process yield and surface quality of casting may be improved, the production cost is reduced, and the requirements of mechanical properties can be met.
The final inclusion in casting does not affect the mechanical properties and performance.
Controlling the pouring temperature According to last solidifying feeding mechanism, pouring temperature is one of the important factors which achieve the dynamic directional solidification of casting.
The castings can be able to meet the mechanical property by test.
Adopting this foundry technology, the process yield of steel castings was greatly increased, its surface quality was greatly improved, and the requirements of mechanical properties could be met.

The Improving Measures Research on the Cycle Life of Lead-acid Batteries for Electric Vehicles Lu Junmin1,a, Wang Xiaokan1,b 1Henan Mechanical and Electrical Vocational College, Xinzheng, 451191, China awxkbbg@163.com, bwangxiaokan@126.com Keywords: Grid alloys;Mixing Paste and Curing Process;The Negative Additive;The Combination of the Positive and Negative Plates Abstract.
By describing the main affecting factors of the small electric vehicles cycle life for the lead-acid batteries,then studying the main technical measures that how to improve the deep cycle performance of the batteries to prolong its life.When the methods of the combination of grid alloys ,mixing paste and curing process parameters control, the selection of the negative organic additives and the sets mode of the positive and negative plates were used,the battery performance and the cycle life greatly improved and the failure rate decreased.
This paper mainly introduces the main factors which influencing power battery life, and studies the main measures of improving the the deep circulation performance and service life.
The Main Influence Factors of the Power Battery Life The Corrosion Deformation of the Positive Plate When the battery is in the long deep discharge cycle,the positive plate will suffer corrosion, grid size will linearly increase, which resulted to ribs and border elongation deformation or fracture even occurs short circuit.Anatomizing the end life battery, the deformation and fracture,the irregular fracture penetration separator plate can be seen on both sides of the plate, the upper plate expansion to the bus and cause cell short-circuit phenomenon.Theory and Practice has proved that grid corrosion and deformation is one of the important causes of deep cycle battery life shortened,so the electrochemical properties of the power battery plate should be smaller corrosion rate and non intergranular corrosion,and also should have the appropriate hardness,strength and creep resistance on the mechanical properties.
References [1] Hao Xiaohong; Qin Jian Feng; Wang Du; GAO Yun-fang.Analysis of New Energy Storage System Using Factors Lead-Acid Battery Life[J].

Effect of Immersion Coating Deposition Time on Solder Joint Properties A.M.
Surface finishes on copper pads have been known to be one of the influential factors in the solder joint quality.
Deposition times during immersion plating process on copper pads are important as the thickness of the coating will decide several properties of surface finish, such as wettability during soldering process.
A reliable solder connection must have solderable surface to form good solder joint since interfacial reaction at solder joint are key factors in the fabrication of electronic products [10].
Shibuya, Mechanical characterization of Sn–Ag-based lead-free solders.

Through analyzing the components of each subsystem, the potential safety factors set of high-speed railway accident U={R, S, H} is established, where R is potential safety factors of personals subsystem, S is the potential safety factors of equipment subsystem, H is the potential safety factors of environment subsystem Personnel subsystem.
Due to the intrinsic properties and potential destructive power, the equipments in high-speed railway system need more reliability and safety.
In the high-speed railway system, environment factors increase the risk by affecting the system inside.
For example, = {higher speed}, = {no-load}, = {the large curve radius}, these three factors affect alone has small probability of accident, but the combined effect of three factors together increase the probability of the accident, and will result in the emergence of an accident (as shown in Figure 2).
Figure3 High-speed railway derailment accident chain 4 Case analysis The train derailment will destroy people' lives and property.