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They are important factors to lead to the aircraft disaster.
By using their electromechanical coupling characteristics, they can offset the harmful vibration suppression by the way to transform mechanical energy into electrical energy.
is the scale factor. , respectively, is the piezoelectric actuator chip width and the sensor chip width. ， respectively represents the beam area where is covered by piezoelectric sensor chips and actuator chips.
The control chart is shown in Fig.1, but this usually produces the control spillover problems that affect the control effect, for it people also proposed a solution.
Its mechanical model is sometimes simplified into the concentrated force and bending moment excitation at the edge of endpoint.

Correlation between the Hydrogen Absorption Properties and the Vanadium Concentration of Ti-V–Cr Based Alloys N.E.
For the electrochemical H-charging process, a low η level is preferred along with good hydrogen sorption properties.
For the pure ternaries, good sorption properties were found for x(V) = 60 only, but for those doped with Zr7Ni10 , much better properties were achieved for materials with x(V) = 20 and 40.
Kabutomori, The influence of microstructure on hydrogen absorption properties of Ti-Cr-V alloys, J.
Kabutomori , Correlation between hydrogen absorption properties and homogeneity of Ti–Cr–V alloys, J.

Mechanical Properties.
Mechanical properties of the developed steel are similar to Type430J1L as shown in Table 2.
Ridging and Other Properties.
Table 2 Mechanical properties of the developed steel.
Table 3 Physical properties of the developed steel.

Explosion property of the explosive is unstable, which affect seriously mental explosion welding quality.
Because it has not flinty materials in the explosive, wax adheres to the surface of multihole and leavening particle, and wax has many good properties, such as low viscosity, and high softening point, lubricating and good toughness, which makes explosive particle has excellent external lubricating, it is equal to explosive particles adhered a layer of lubricant, so mechanical sensitivity of the explosive is low.
Table 3 Binding rate and shear force of different plate after explosion welding No compound/base plate materials Compound plate thickness [mm] Base plate[mm] Charge thickness[mm] Once ultrasonic detection binding rate[%] Shear force[MP]a 1 OCr13AL/Q345R 3 22 35 100 406 2 OCr13AL/Q345R 4 18 45 100 428 3 B30/Q345R 3 18 35 100 346 4 B30/Q345R 4 22 45 100 397 From table 3 it can see that the binding rate is 100% for OCr13AL/Q345R, and B30/Q345R compound plate, and their mechanical properties satisfy the production requirement of compound plate.
Moreover, the explosive has good flowing property, so it is easy to pave charge.
Factors affection explosion speed of explosive charges under the explosive condition.

Performance evaluation of an automobile air conditioning system using R134a Dilek Ozlem Esen Kocaeli University Technical Education Faculty Mechanical Education Department 41380 Kocaeli/ Turkey desen@kocaeli.edu.tr Keywords: Refrigeration, Automobile Air Conditioning, Exergy, R134a.
Fig.1 also indicates the locations where mechanical and electrical measurements were performed.
Thermodynamic properties of the air and R134a were evaluated using o software package for refrigeration [16-17].After finding the evaporator load, the refrigerant mass flow rate can be determined from: (4) Condenser heat rejection rate, (5) Assuming that the compressor is adiabatic, compressor power can be written as; (6) The energetic performance of the system is found by evaluating its coefficient of performance, defined as the ratio between cooling capacity and compressor power: (7) Neglecting the heat transfer with the environment, the rate of exergy change in the compressor can be evaluated as: (8) The rate of exergy change in the condenser including changes in the discharge and liquid lines due to heat loss to the ambient air can
Exergy change in the adiabatic compressor is caused by gas friction, mechanical friction of the moving parts and internal heat transfer.
Results show that condensing temperature does not affect exergy change in the evaporator as strongly as it affects changes in other compenents whereas evaporator load and compressor speed are the two factors determining exergy change in evaporator.

Introduction Since many decades Zinc Oxide has been an attractive and vital material for research due to its unique properties and diverse applications.
A lot of efforts have been made to study the various parameters that affect the microstructure and properties of thin films grown by sol-gel process.
Fig.1. pH of precursor solution as function of solution aging time Sol-Aging effect on structural properties of ZnO thin films.
Sol-Aging effect on Morphological properties of ZnO thin films.
Joon Kwon et al. suggest that the difference in thermal expansion coefficients between the film and substrate and/or volume reduction upon crystallization are the major factors for the wrinkling of thin films [30, 31].

However the individual/combination effects of these factors are yet to be established.
Sami Abulnoun et al also reported that synergism factor of erosion corrosion is in the order of 4.9 times that of pure erosion [2].
With ingression of sand in the water pumped each particle act as a bullet on the surface affected with corrosion inducing more erosion.
Test coupons of size 50mmx30mmx10mm were coated on mild steel and 3 samples of each type of coat were tested for mechanical properties.
The phenomenon of ‘impulsive erosion corrosion’ and ‘partial cavitation corrosion’ is to be studied in detail to have more insight into the failure modes and factors and their contribution References [1] Ramakrishna Malka, Srdjen Nesic and Daniel A.Gulino, ‘Erosion Corrosion and synergistic effects in disturbed liquid particle flow’, Institute of Corrosion Science and Technology, Ohio State University Athens USA, paper No 06594, Corrosion Science and Expo (2006). pp 16-18 [2] Sami Abulnoun Ajeel and Mohammed Abulatef Ahmed, “Study of synergy effects on Erosion corrosion in oil pipes”, J.Eng and Tech Vol26 No9, (2008)

An ellipse model is used to represent the defects with apparent directional property, and edge detecting will be realized by it.
Parameters of power are sensitive to coupling conditions, but they are not determinant factors for parameters of velocity.
The amplitude of received signal is easily affected by prestress between plate and transducer or the coupling condition.
Time of flight will be used for tomography, because velocity of lamb wave is not depend directly on prestress between plate and transducer or the coupling condition An ellipse model is used to represent the defects with apparent directional property.
Ellipse model for edge detecting An ellipse model is used to represent the defects with apparent directional property.

Introduction High-porosity metallic materials have attracted more and more attention in the last few decades with increased availability of practical manufacturing technologies and improved understanding of their physical and mechanical properties[1].
The decomposition of (NH4)2CO3 or CO (NH2)2 at low temperature affects the pore structures and leads to an imprecise control of porosity.
Therefore, the amount of NaCl and the sintering temperature are both important factors to the pore structures of porous NiTi alloys.

Symbols of Chinese Elements and Product Form The theme of “image” refers to the fact that people directly choose the natural properties of “objects” and natural image as theme, and thus build up the shape of the product, or establish a basis for new product modeling.
As is known to all, product design is not only influenced by the constraints of the core mechanism, structure, performance, construction, materials, work methods, production technology of the products, but also affected by consumer culture, taste, fashion, lifestyle and other human factors, with the strengthening of consumer awareness and the continuous improvement of consumer grade.
[3] Zhu Lexi, Zhuang Yongcheng, Duan Fubing: Summary of Cross-cultural Product Design and Internationalization, Electrical and Mechanical Engineering, the 6th issue in 2008