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Several factors which influenced the air permeability of the fabric are fabric density, warp and weft linear density, weaving structure, and fibre content of the fabric [42,43].
Kumar, H.S Nalwad, A review: Antimicrobial properties of ZnO nanomaterials.
Lavasani, Antimicrobial properties of Pomegranate (Punica granatum L.) as a Tannin rich Fruit: a review.
Eltahan, Structural parameters affecting tear strength of the fabrics tents, Alex.
Amer, Comparison of functional properties of woven and knitted denim fabrics.

Unlike most material properties, machinability cannot be simplified into a unique work material property, but the resultant property of the machining system which is mainly affected by work material’s physical properties, heat treatment, and work-hardening behaviour, as well as other machining conditions, Hongyu Zheng and Kui Liu, [1].
They observed that the machinability index and mechanical properties of the materials play an important role in establishing the milling time and surface roughness.
They also correlated the surface roughness with the mechanical properties of the material and the specific machining energy for AWJM.
The use of carbon fibre-reinforced composites is increasing today since they have an excellent weight-to-mechanical properties ratio.
Mechanical properties of tested materials.

Synthesis of carbon nanotubes with typical structure from the pyrolysis flame Yuanchao Liu1,a , Nana Zheng2,b, Jingdong Huang3,c and Baomin Sun 4,d 1School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China 2Qingdao Haijing Chemical(Group) Co., Ltd, Qingdao,266042, China 3Cooec-Enpal Engineering Co., Ltd, Qingdao, China 4Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, Ministry of Education, North China Electric Power University, Beijing, 102206, China aycliu_999@126.com,bznn790614@163.com, chjd@enpal.cn,dsbm@ncepu.edu.cn Keywords: carbon nanotube; V-type pyrolysis flame; typical structure; synthesis and characterization Abstract.
Carbon nanotubes also had special properties in electrical, mechanical [2] and can be applied in such as nano-electronic equipment [3], composites reinforcement [4], hydrogen storage material [5], electron probe [6], etc.
So catalyst is the important influence factors in preparation of carbon nanotubes.
It can be concluded that the V-type pyrolysis flame method is effective for synthesis of carbon nanotubes. 3.3 Analysis of main affecting factors Temperature was the key parameter in the process of synthesis carbon nanotubes.

These films, like natural diamond, have many interesting physical properties: mechanical hardness, very high thermal conductivity, and optical transparency [1,2].
This research was focused on developing the CACVD technique to synthesize the selected area of diamond films and evaluate their properties.
Moreover, the growth rate of diamond films is varied by the factor of gas ratio, the distance from inner flame to substrate, and the synthesized time.
Wilks: Properties and Applications of Diamon (British Library Cataloguing in Publication Data, Cambridge 1994)
Davis: Diamond films and coatings: Development, Properties, and Applications (Noyes Publication, USA 1992)

Reactive Power Optimization Analysis of 35KV Regional Power Grid Based On The Genetic Algorithm Pei Huang Mechanical and Electrical Engineering Institute of Jiangsu JianZhu Institute, Xuzhou, Jiangsu, China Keywords: Reactive power optimization, Genetic algorithm, Power system, Maximum operational mode.
The genetic algorithm is applied to settling the problems with the characteristics of multi variables, multi constraints, nonlinear and discontinuous properties, which is discussed in this paper.
Model of reactive optimization Basically, under the condition that the active flow schedule is confirmed in the power grid, the capacity of reactive compensation equipments affects the objective function (1) (1) H is the number of nodes, and are the voltage value of node i and node j.
Besides the capacity of reactive compensation equipments , the factors affecting the objective function includes the grid level and the application of on-load voltage regulation0.

In cold forging processes the high tribological and mechanical loads often lead to early tool failure.
Therefore a lot of coatings with different properties are necessary, which need to be adjusted to the various applications.
In some applications long glide paths or high friction are the dominant factors for wear occurrence [6].
Their different properties need to be adjusted to the plurality of applications [8].
Normally two different individual layers with different properties are alternating.

Error and accuracy of natural frequency are analyzed with modeling properties.
The properties are as following: The disk has a thickness of 90mm and a diameter of 450mm.
They are both made of steel with the material properties E=206GPa, G=79.4GPa, and ρ=7850kg/m3.
Influence Characteristics of Models of Shaft and Disk The mentioned model of rotor system is still used in this section as an example for convenient with same properties.
As a result, the natural frequencies are affected by various factors of modeling the system.

Introduction One of the non-destructive methods of controlling of material properties is acoustic emission [1-14], which manifests itself during macro-, micro- and nanoscale rearrangement of the structure of elements.
Fractogram of micro-damage of weld metal at different moments of time The model of a stream of signals of AE in the form of dependence on time of t of number of Nå of impulses of AE of materials has the following general view: Nåt=V∆t, f, uФ∆t, f, ududfd∆t×C0ω0ω0+∆ωψω1--exp-0tdt'θU0,ωt'dω, (1) where each of the parameters included in (1) is presented in Table 1, has a certain physical nature and depends on various factors affecting the control suitability of destruction and strength properties of the material.
Makhmudov, A Study of the Acoustic Properties of a Body of Heterogeneous Rocks and Concrete Lining under Natural Conditions, Technical Physics 65 (2020) 133–138
[20] Shuncai Li, Qiu Yu, Jingjing Pu, Fei Chen, Study on mechanical properties and acoustic emission characteristics of metallic materials under the action of combined tension and torsion, Engineering Fracture Mechanics 200 (2018) 451-464
Mechanical engineering industry 19(1) (2019) 5-14

Online Prediction and Verification of Cured Quality of Advanced Composites in Autoclave Process Yongan Zhang1,a, Lihua Zhan1,b* 1 College of Mechanical and Electrical Engineering, Central South University, Changsha, China 410083 acsuzya@csu.edu.cn, byjs-cast@csu.edu.cn, Keywords: Composite, Curing process, Fiber Bragg grating, Online prediction Abstract.
The strain in curing process of composite part would be influenced by curing compaction, resin flow, curing action and tool-part interaction, meanwhile these factors would also influence the final cured quality of composite part.
Introduction Carbon fiber reinforced resin matrix composites are wildly used in aerospace filed for its excellent properties of high specific strength and stiffness, good creep-resistant performance, significant weight reduction effect, and so on[1,2].
But in the fabrication process of composite part, defect such as pore, delamination and rich resin, would decrease the part’s dimensional precision and the mechanical properties of shear strength, tensile strength, bending strength, finally influence part cured quality, even cause the part failure[6].
In cooling stage, the resin is fully cured, the difference of pressure mainly affected the tool-part interaction.

Improved mechanical properties can be obtained after thermo-mechanical deformation, such as normal extrusion, rolling and advanced severe plastic deformation process (HPT, ECAP, etc.) [4, 5].
Moreover, the deformation capability of Mg alloys is strongly affected by texture.
Researches have indicated that damping behaviour of Mg varies with large number of factors, such as solute element, grain size and its distribution, grain boundary condition, texture, and et al.
The damping tests were carried out at a dynamic mechanical analyzer (DMA) (Model TA Q800, USA) with single cantilever vibration mode.
Table 1 List of the tensile properties from Fig. 4.