Search results

The choice of material for the low pressure turbine blades and the high pressure compressor blades is one key factor to decrease the weight of the engine.
Gamma-TiAl materials are suitable for applications in aircraft engines because of their good oxidation resistance at temperatures up to 700 degrees Celsius in combination with excellent mechanical properties [2].
The main advantages of the laser cladding process are high precision, a minimized heat affected zone (HAZ), low distortion and the variety of materials.

IMC in solder joints serve mechanical strength and electrical conductivity for electronic parts [1].
When the thickness of IMC is very thick, the joint of solder and electronic parts become brittle and will affect the reliability and performance of the solder [3,4].
However, aging temperature has been the most influence factor for IMC growth compared to aging time.
Journal of Materials Science: Materials in Electronics, 2012. 23(100-107) [3] Zhang, L., et al., Microstructures and properties of SnZn-xEr lead-free solders.

Introduction Commercially available pure titanium has been frequently used as dental and orthopaedic implant material because of its suitable mechanical properties, significantly lower density, excellent biocompatibility and superior corrosion resistance which are required in biological environments [1-3].
Corrosion behaviour of metallic biomaterials is one factor used to determine material degradation and biocompatibility.
Proteins affect the corrosion behaviour of implanted materials and either increase or decrease corrosion [10,11].

The dynamics of the rotary control valve is described by the following system of equations: (1) where m – weight of the rotary dispenser 2 with crank 6; Vcx – the speed of the crank 6 in the projection of the x-axis; xc – the movement of the crank 6 on the x-axis; α – the coefficient characterizing losses of the rotary control valve; Fout – the force formed by the pressure in the cylinders 4 or 5 (Fig.2), which pushes the crank 6 and depends on the position of the piston-striker (outer factor); Fx – the force acting through the roller 8 in the projection on the x-axis.
Therefore, we can affect the operation of the valve, and thus to the work of PHIU by changing the design parameters (the radius of the rounding of the crank 6 and the radius of the roller 8) and the pressure in cylinder cavity 7.
International Conference on Mechanical, Material Engineering, Location: Hubei Univ Automot Technol, Shiyan, PEOPLES R CHINA (2013)
Mathematical modeling based on the properties of the treated medium, Saarbrucken: LAP LAMBERT Academic Publishing GmbH & Co.

Reality shows that only the fully prepared fire control facilities design of underground garage can effectively reduce the loss of fire and ensure the safety of people's property and lives.
Compared with the ground building fire, the characteristics of underground garage fire are as follows: [1] The fire types are complex .Underground garage, different from common building, has a dual characteristic of underground buildings and parking lots, therefore the factors causing fires are more than the common building.
In the event of fire, equipment operation will be affected and some fire control facilities will not be able to work effectively.
Finally, after comprehensively considering the personnel quality of those who using fire extinguisher in underground garage, machine room being narrow lane width factors and so on, small fire extinguisher cart will be a good choice.
Figure 3: The low position spray system Figure 4: The automatic sprinkler in mechanical stereo underground system in the underground garage garage of The First Affiliated Hospital of The First Affiliated Hospital of of Harbin Medical University Harbin Medical University The combined automatic sprinkling and foam system.

Therefore, loss of the overall performance is by three factors: the missing of increasing cache and loss of missing the increasing cache, additional instruction executes null operation insert into code and decryption.
This formula (1.2) can be discredited to finally obtain the formula [14]: (3) The above formula is the spectrum of the time sequence, is called the butterfly factor.
Table 1 Increasing percentage of the properties of the instruction and data protection scheme in execution time Encryption Instruction Data Datum Encryp-tion Encryption tag (memory) The encrypted tag (external memory) Encrypted hash tag (memory) Encrypted hash tag (external memory) Encryption Encryption tab Cryptographic hash tag Median 0.03 9.48 0.03 47.41 0.19 0.02 0.02 0.07 Cyclic Redundancy Code 0.02 17.03 0.02 99.16 0.15 0.02 0.02 0.06 Dijkstra 0.02 11.57 0.03 58.02 0.54 5.27 5.5 15.62 Fourier transform 0.08 13.35 0.09 39.16 1.25 3.8 3.89 10.71 Fourier inverse transform 0.07 14.09 0.08 47.54 3.52 12.20 12.47 33.26 Patricia 0.06 43.05 0.05 67.59 0.47 2.74 2.81 8.74 Stellar Perspective 0.07 5.27 0.02 22.11 0.49 0.10 0.11 0.31 String search 4.95 20.54 5.66 10.38 28.30 9.75 10.23 29.63 Susan smooth 0.04 4.95 0.03 24.40 0.31 0.16 0.07 0.49 Susan boundary 0.82 5.49 0.94 18.40 5.74 6.84 7.06 19.28 Susan people 1.5 7.6 1.73 26.24 11.75 13.0 13.41 36.17 Domain 0.01 2.28 0.01 11.02 0.08
On the basis of this observation we conclude, strong integrity and protection of the control flow are not limited in embedded system when the system can provide something without any time affecting.
Beijing: Mechanical industry press 66-73 [3] Zhuang.

Introduction One of the present trends in mechanical engineering is a wider use of parts with reduced weight and high strength properties; an example of such parts being hollow parts.
Parts with the above-mentioned properties can be produced in two ways.
The variations of the force depend on both geometrical properties of the upper region of the workpiece and changes in the upper die-material contact surface (as can be seen from Fig. 6).
The amplitude-like character of the torque distribution results from the properties of numerical modelling, i.e. changes in the material-tools contact surface.
The temperature drops to 400°C, which means that the effect of temperature on properties of the tools should be investigated in further research works.

Here, shear correction factors are required to obtain the relationship between the resultant shear forces and the shear strains.
An anisotropic material is a material that has its elastic properties vary in different planes.
These elastic properties are the elastic modulus, Poisson ratio and the shear modulus.
Whereas an isotropic material has the material properties being the same in all directions.
Example Problem The engineering properties of unidirectional graphite/epoxy material are given by [18] as shown below.

Objectives The application of thin cutting tools for stone sawing processes is influenced by several factors.
Material properties which influence the machinability are the constituents and the composition that vary even for the same kind of rock [3].
The balance to be found here is additionally strongly influenced by the vibration patterns of the tool which relate segment properties to steel centre characteristics.
The other influence factors are given by the properties of the saw blade like: the diameter ds, the diamond concentration C, the partition of the segments at the circumference λ and the geometry of the diamonds grits r.
However it is necessary to investigate all influencing factors to be able to achieve the required industrial quality standard.

In fact, the change in microstructure of concrete is fundamental cause for the changes of mechanical properties.
Lima and RCA[20] thought that the concrete after fire changed its microstructure and macro mechanical properties such as compressive strength.
Ucarkosar, B., Yuzer, N. and Kabay,N.[35]in Yildiz Technical University think that when concrete exposed to high temperature, its physical and mechanical properties will change.
And there is no further study on the relationships among comprehensive conditions , concrete microstructure and macroscopic mechanical properties
Mechanical properties and microstructure of high strength concrete containing polypropylene fibres exposed to temperatures up to 200 °C Cement and Concrete Research, 2005, v35, n11, p2192-2198