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For the purpose of designing and optimizing electromagnetic clutch, torque prediction is a very important factor.
Introduction The electromagnetic clutch is used for the mechanical power transmission in most of office machines like laser printers and scanners [1].
Since the static torque is generated by each clutch, the characteristic of torque is the main factor of the office machines under working condition.
And based on it, get the optimized shape of armature to improve the torque property.
When the air gap decreases, the magnetic force increases because of the air gap affects the magnetic resistance.

The logical step then is to verify that the newly designed concrete is comparable to the existing concrete not only in mechanical and physical-mechanical properties but also in durability.
The rate of leaching of calcium hydroxide is dependent on many external as well as internal factors [2].
This results in either soluble (or leachable) or insoluble (and thus non-leachable) compounds that do not have binding properties and are not expansive.
In the initial stage of sulphate corrosion, it is usually true that as long as there is enough space in the porous matrix of concrete to deposit newly formed products, the corrosion process in concrete appears to (during this phase it actually does) have favourable impact since it reduces concrete porosity and therefore improves related properties of concrete, for instance compressive strength [2,5].
This did not apply to the test beams 40×40× 160 mm, which were made solely for the purpose of determining the strength properties.

In addition to these characteristics, its low price and its mechanical properties (Table 1) make it an ideal candidate for a wide range of applications among which prototypes manufacturing, the objective of this work [10].
In this case it was applied a scale factor of 0.35 to the original nine pieces designed.
Printing and assembling of a previous model with a scale factor of 0.35 Finally, the printing of each parts in its designed size was carried out.
Wittbrodt, The effects of PLA color on material properties of 3-D printed components, Addit.
García-Plaza, Additive manufacturing of PLA structures using fused deposition modelling: Effect of process parameters on mechanical properties and their optimal selection, Mater.

This undesired radiation exposure may create issues either by affecting electronic equipment operation or by affecting human health [2].
Carbon materials (CM) have been investigated for EMI shielding due to their remarkable properties, namely high electrical conductivity, high surface area, low density and high chemical, thermal and mechanical stability.
Herein, the goal was to create EMI textile-based shields with superior properties: thin, lightweight and flexible with good radiation absorption properties in the radiofrequency band.
Since MWCNT@tex does not display magnetic properties, the higher value of SEA relative to the SER could be justified by its dielectric properties.
The parent textiles did not display any shielding properties, having SE < 1 dB.

Wetted perimeter is shortest, and mechanical performance is good.
According to reference literature [13], stability analysis and calculation of design strength grade of concrete is C30, strength of concrete tensile is, the safety factor is, plastic influence coefficient of the tension zone of the concrete and wet density of soil, internal friction Angle , the bending moment of the concrete can satisfy the demands of earth negative bending moment.
It is suitable for small and medium-sized water channel, and U-shaped slot is not affected by the influence of underground water, soil, topography, climate, such as irrigation channels.
Besides having the advantages of traditional u-shaped slot in the canal seepage, but also having high mechanical properties, excellent durability, good environmental performance, assembly quality and high cost performance.

Study on Active Control of Structural Frequency Response Xing Wu Zhanga, Xue Feng Chenb, Shang Qin Youc, Xiao Hed, Yi Jie Wange and Zheng Jia Hef State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, PR China azhangxingwu1984@yahoo.com.cn, bchenxf@mail.xjtu.edu.cn, cyshq234@126.com, dhe.xiao@stu.xjtu.edu.cn, elaowangyj@126.com, fhzj@mail.xjtu.edu.cn Keywords: Active Control, Frequency Domain, Multivariable Wavelet Finite Element Method.
Active control [1-7] obtains much more attention in recent years because it has many attractive properties, such as flexibility, adaptability et al.
However, if we want to reduce or increase the value of arbitrary one or more frequencies while do not affect the others or fully change the current frequency characteristics, the above studies mentioned less.
Using gradient descent procedure and adding momentum factor for increasing learning rate, the correction formula for weights biases connecting input and hidden layers, hidden and output layer can be obtained
Most of modern mechanical and other industrial equipments may work with fixed frequency characteristics.

Karami and Mahmudi suggested that grain refinement was an important factor affecting the superplasticity of single b-Li phase Mg-12Li-1Zn alloys [15].
Further grain refinement may yield better mechanical properties.
Lee, “Mechanical properties and microstructures of various Mg-Li alloys,” Mater.
Son, “Microstructure and mechanical properties of Mg-xLi-3Al-1Sn-0.4Mn alloys (x = 5, 8 and 11 wt%),” J.
Datye, “Synthesis, characterization and mechanical properties of biodegradable magnesium alloys,” Emerg.

But most studies have shown that the interface morphology and physical properties of thermal have a direct relationship with sintering technology.
There are many factors to affect interface conditions.
Study of the Thermal Conductivity on Diamond / Cu Composites Studies of Diamond/ Cu composites interface usually involve its microstructure and seldom deal with its physical properties, among which the main bottle-neck is the analysis of testing techniques, and hardly to achieve the information about micro-physical properties of related materials.
Weisheit from German[34]have studied the applications of SThM method in research thermal properties of nano- electronic devices.
Conclusion The interface situation of Diamond/Cu composites is the key to develop the thermodynamic properties of materials.

The design consisted of four factors at four levels and two factors at two levels.
Table 4 describes the L16 () orthogonal array with factors.
The signal-to-noise ratio (S/N) is normally used to justify the influences of factors.
This indicates that this experiment obtained a corresponding S/N ratio close to the normalized S/N ratio and it has a number of good properties among 16 experiments.
However, this is not the optimum level of factors.

Based on the index data, the back propagation (BP) neural network is used to build the model of the relationship between process parameters and product properties.
The influencing factors of power energy saving potential can come down to six aspects: power consumption rate, net coal consumption, installed capacity, line loss rate, generated energy, average unit capacity.
Table 1 Information table of power energy saving potential Year U S Z D G A Total energy saving 2001 6.25 385 33848.69 7.55 14838.56 5.30 1776 2002 6.18 381 35657.00 7.35 16542.00 5.34 1647 2003 6.46 379 37294.55 7.29 17823.05 5.45 1483 2004 6.23 374 38763.62 7.31 19834.67 5.53 1536 2005 5.95 372 39621.58 7.18 21249.43 5.65 2168 2006 5.89 367 40529.48 7.04 23478.42 5.83 2305 The factors that affect the power energy saving potential constitute the attribute set .
Synthesize the above three factors, converted to standard coal, the year 2010 will save 78.88 million tons, this also shows that China's power has great potential for energy saving.
[10] Li Qiang, Yu Jing-Yuan, etc, “BP neural network prediction of the mechanical properties of porous NiTi shape memory alloy prepared by thermal explosion reaction.”