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Advances in Numerical and Experimental Study of Dielectrophoretic Assembly of Carbon Nanotubes Shaohua Zhena, Libao Anb,* and Yanyan Liuc College of Mechanical Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, Hebei United University, Tangshan 063009, Hebei, China azhen_shaohua@163.com, b,*lan@heuu.edu.cn, cliu.yan0207@163.com Keywords: Carbon nanotubes, Dielectrophoresis, Assembly, Parameter.
The review shows that the magnitude of the applied voltage affects the DEP force and the number of deposited CNTs.
Introduction As a new type of materials, carbon nanotubes (CNTs) have been studied for various applications in science and engineering fields such as electronics, biology, and medicine, due to their excellent electrical, mechanical and thermal properties [1].
Taking into account the ohmic losses of the interface between the particle and medium, for an applied AC field, the time averaged force is given by [12] , (2) , (3) where r is the radius of the particle; l is the longest dimension of the particle; is the permittivity of the particle; is the permittivity of the medium; is the Clausius-Mossotti factor which is related to the complex permittivity of both the particle and the medium.

MATERIAL PROPERTY Component material Resistivity (10-8•Ωm) Relative permeability (μr) Iron core ∞ 5000 Air ∞ 1 Copper bar squirrel cage 1.724e-8 1 Copper stator winding KF*KE*1.724e-8 1 where KF is F-coefficient.
They are all important factors that will be considered in the design of the motor and affect the temperature rise and supplies in the end. 3-D node vector magnetic flux density distribution is periodicity change and reflecting the flux density distribution of motor.
The horizontal axis represents the mechanical angle along the radial direction, 7 pairs of electrodes have a total of 7 cycles and take 1.5 cycles.

Nanomaterials exhibit highly tunable size- and shape-dependent chemical and physical properties, show unique surface chemistry, thermal and electrical properties, high surface area and large pore volume per mass unit area.
By being able to fabricate and control the size, morphology and surface characteristics of nanoparticles, it could be possible to influence the resulting properties and, ultimately, design materials to give desired properties.
It is obvious that the matrix is affecting the sensitivity of the indicator dye.
Nanomaterials exhibit highly tunable size- and shape-dependent chemical and physical properties, show unique surface chemistry, thermal and electrical properties, high surface area and large pore volume per mass unit area.
Although the zero dimensional materials are applied in sensor design, the factors, such as matrix, indicator and immobilization technique still need to be considered in order to achieve the desired sensor’s characteristics.

Estimation of the microscale stress distributions is used to analyse the interaction between microstructure, material properties and damage mechanisms during wear.
Instead, the tin phase was modelled by assigning its material properties to random elements in the grid until the right volume fraction was reached.
The effect of such morphology is still to be researched, but is likely to affect the performance of the alloy negatively.
The ductility of the material is another factor that would help preventing crack propagation [10].
At the microstructural scale, it was shown that the average properties of the composite materials can no longer be used in calculations once the scale of the microstructure starts to approach the thickness of the layers of the graded component.

Because of the huge amounts of data the discrete model usually have, it is time-consuming for data query in intersection process, so that the efficiency of data query is a key factor that effect the efficiency of machining simulation.
But the static index structure relies on the distribution of rough model grid cell, when the rough model is irregular or the grid cell can not be evenly divided, it will lead to many empty nodes, this will affect efficiency of data query.
R*-tree [6] is a kind of spatial balanced tree, which uses the node MBR(Minimum Bounding Rectangle) to organize the neighborhood relations between data objects, with good clustering properties for the multi-dimensional data.
Obtaining Cutting Projection Region of The Nodes Tool path segments within the cutting projection region of node will directly affect the height of node in the simulation process.
So the relation between h and d is established based on the geometric properties of tool.

A major factor that has hindered the development of a performance-based design methodology is the fact that quite limited systematic experimental program has yet been undertaken wherein the imposed loading, the system variables, and the measured or observed response were tailored to specifically monitor, model and calibrate cumulative seismic damage.
Fig. 1 Detail of specimens Fig. 2 Test setup and instrumentation Material Properties.
For all the tested specimens, the mechanical properties of steel bar and concrete are shown in Table 1.
These observations indicate that displacement history affected response under cyclic loading: the number of cycles that could be sustained at a given maximum lateral displacement decreased with increasing number and amplitude of previous cycles in the inelastic range of response.
Test observations indicate that displacement history affected response under cyclic loading.

Heat-reflux extraction for dried root of Angelica dahurica was with 10g of sample and 120mL of 80% ethanol in a flask (250 mL) with a mechanical stirrer and the temperature was placed in 95ºC water bath.
Solvent properties affect the behavior of ultrasonic cavitations include vapor pressure, viscosity, and surface tension.
Medium vapor pressure is known to be the most conductive to ultrasonic activity of these properties.
Another important factor for the choice of solvent is its polarity as imperatorin and isoimperatorin are polar compounds.
The surface tension decreased with the increase of temperature affects the bubble formation and collapse.

Structural vibration induced by underground trains is affected by vehicles, rail, geotechnical, structural and other factors, the process is very complicated[6,7,8], the vibration source values of the underground train has not yet been given in the corresponding specification[9], Therefore, during the assessment of structural vibration in more complex situation , there is still a need for targeted numerical calculation.
Fig.1 Futian underground hub Fig.2 Typical cross-sections Analysis of train induced vibration To get quantitative results with high degree of confidence, it is necessary to consider the following key points: high speed train vibration load, track structure, the station structure, soil properties, and vibration transfer rule.
Factor of Track Structure.
Fig.5 Rail pads and the mechanical model Characteristics of Foundation and viscous-spring Boundary Parameters.
For Futian station's underground wall and plate, a unit width is taken to calculate, and is regarded as a elastic foundation beam under soil pressure, the action of soil is simulated by a normal spring with a concentrated force, the spring represents compressed soil area , in which is width of the wall unit and , then the pressure distribution on the area is: (2) By Boussinesq solution, displacement under the effect of is available: (3) spring stiffnessof a single unit: (4) is shape factor related to ,can be deduced by linear interpolation: when ,,when,,and when, Different for each soil layer can be reflected by, that means, a harder

However at these temperatures in air, Si-C-O fibres are affected by delayed failure under mechanical loading [3].
Yet, recent investigations on other Si-C-O fibres have shown that this factor do not solely account for the disparities in the fibre reaction rates.
This is achieved by considering a wider range of fibres with specific properties, as well as model materials such as Si-C-O oxycarbide glasses or pure SiC.
If the percolation state of the free carbon phase is not the main factor controlling the reactivity of these three fibres, then the nature of the heteroelement is likely to play a critical part.
Other Tyranno fibres (ZM, Lox-E, ZE) containing similar heteroelements but less oxygen, are currently being studied to clarify this point Conclusion This kinetic study of the reaction between various Si-C-O materials and chlorine has shown that the mechanism is essentially similar but the reactivity (the kinetic constant K) varies considerably with several factors related to the initial composition and structure.

Nanocopper has become one of the research hotspots of metal powder for 3D printing, due to its excellent properties.
However, the maturity of applicable materials for 3D printing materials is developing relatively slowly at present, especially for metal powder materials, the price is high, the bottleneck of the material is bound to restrict the promotion of 3D printing technology, affecting its industrialization process, so the 3D printing consumables metal powder material has an important strategic significance[4,5].
The structure and specifications of the powder collector are one of the key factors that determine the powder yield and yield.
Therefore, our country should strengthen the research and development of advanced technology for the preparation of nano-copper powder for 3D printing, pay close attention to the technological developments of foreign giant companies and encourage enterprises to increase the protection of independent intellectual property rights of 3D printed materials
Preparation, characterization and microwave absorbing properties of FeNi alloy prepared by gas atomization method[J].