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Online since: April 2024
Authors: Dmitry V. Ardashev, Ramil Dadashov, Sergey Gandzha, Nikolay Neustroev, Andrey Sogrin, Denis Korobatov
The calculations took into account the following phenomena: the nonlinear magnetic properties of ferromagnets and their magnetic saturation, eddy current losses in massive electrically conductive parts [12–14], and the mechanical transient processes associated with the inertia of the armature and the connected spool.
The electromagnetic force directly affects the EMC speed.
Reduction of the System Inductance The EMC dynamic properties can be improved by reducing inductance.
The geometric model of the EMC was transformed to be compatible with the software product and supplemented with housing parts and information on the thermal properties of the materials of its constituent parts [15].
The anisotropy of thermal properties was neglected. 40 °C air temperature was set as the environment.
The electromagnetic force directly affects the EMC speed.
Reduction of the System Inductance The EMC dynamic properties can be improved by reducing inductance.
The geometric model of the EMC was transformed to be compatible with the software product and supplemented with housing parts and information on the thermal properties of the materials of its constituent parts [15].
The anisotropy of thermal properties was neglected. 40 °C air temperature was set as the environment.
Online since: May 2019
Authors: Terence Tumolva, Sweet Hazel Aquino, Kryzsa Mae Cabeguin, John Frederick Imperial
However, these dressings often cause mechanical stress and discomfort when removed [2].
Linear regression on the cross products of the factors were also done.
Mean peel loads (in N) for each factor combination.
The adhesion strength data are subjected to ANOVA (confidence intervals at 95%, significance at p-values < 0.05) to identify any main factor and interaction effects, using an orthogonal polynomial model (Equation 1) that includes the cross-products of the factors.
However, further testing must still be done on the other pertinent properties prior to commercialization.
Linear regression on the cross products of the factors were also done.
Mean peel loads (in N) for each factor combination.
The adhesion strength data are subjected to ANOVA (confidence intervals at 95%, significance at p-values < 0.05) to identify any main factor and interaction effects, using an orthogonal polynomial model (Equation 1) that includes the cross-products of the factors.
However, further testing must still be done on the other pertinent properties prior to commercialization.
Online since: March 2020
Authors: Su Min Li, Li Wei Yuan, Xiang Xin Li, Zi Fen He, Jian Bo Xia
The most important physical mechanical property of debris flow is its rheological behavior.
There are many influencing factors such as particle size, water content, viscosity of fluid, limit shear stress, and the friction coefficient of downstream bed.
The advantage of the model is that it conforms to the rheological properties of sand containing fluid flow process.
Taking into account of the experience of the secondary membrane bag dam and the physical properties of the tailing ultrafine particles, the membrane bag dam type is adopted in expansion design, and the sub-dam of each stage is 3.0 m.
Research on the Influence Factors of Flow and Deposition of Debris Flow Based on the Flo-2D Simulation, J.
There are many influencing factors such as particle size, water content, viscosity of fluid, limit shear stress, and the friction coefficient of downstream bed.
The advantage of the model is that it conforms to the rheological properties of sand containing fluid flow process.
Taking into account of the experience of the secondary membrane bag dam and the physical properties of the tailing ultrafine particles, the membrane bag dam type is adopted in expansion design, and the sub-dam of each stage is 3.0 m.
Research on the Influence Factors of Flow and Deposition of Debris Flow Based on the Flo-2D Simulation, J.
Online since: November 2015
Authors: Shinya Kawata, Kentaro Iwami, Norihiro Umeda, Nashun Nashun
The material properties of electroplated NiW alloys with potential for use as emitters in thermionic energy converters were investigated.
NiW alloy films with W content ranging from 11 to 25 at% were electroplated and the material properties of the alloy films including their surface morphologies, and crystallinities, were determined.
Electroplated NiW alloys have good strength, hardness, wear-resistance, and their properties depend on W content in NiW alloy [5, 6].
Changes in the electron emission properties, crystal structure, and surface morphology were also examined with and without heat treatment.
Electroplated NiW alloys with different W content were prepared and their properties investigated.
NiW alloy films with W content ranging from 11 to 25 at% were electroplated and the material properties of the alloy films including their surface morphologies, and crystallinities, were determined.
Electroplated NiW alloys have good strength, hardness, wear-resistance, and their properties depend on W content in NiW alloy [5, 6].
Changes in the electron emission properties, crystal structure, and surface morphology were also examined with and without heat treatment.
Electroplated NiW alloys with different W content were prepared and their properties investigated.
Online since: December 2016
Authors: Adam Konvalinka, Pavel Svoboda, Jaroslava Koťátková, Jan Zatloukal, Elena B. Cherepetskaya, Alexander N. Kravcov, Ivan E. Sas, Nikolii A. Morozov
This is probably due to the fact that the mechanical bond depends on the surface properties and, to some extent, on the shape of aggregate grains.
The properties of concrete aggregate determine the value of compressive load at which the onset of cracking occurs; similarly, the ultimate flexural strength of concrete depends on these properties.
But the relationship between these two parameters does not depend on aggregate properties.
The gain factor was 75 dB.
Morozov, Study of Effects of Weathering Factors on Internal Structure of Rocks by Laser Ultrasonic Spectroscopy.
The properties of concrete aggregate determine the value of compressive load at which the onset of cracking occurs; similarly, the ultimate flexural strength of concrete depends on these properties.
But the relationship between these two parameters does not depend on aggregate properties.
The gain factor was 75 dB.
Morozov, Study of Effects of Weathering Factors on Internal Structure of Rocks by Laser Ultrasonic Spectroscopy.
Online since: December 2014
Authors: Jie Li, Wan Ying Qu, Fang Wang, Wan Zhen Li
Abstract: This paper analyzes that the climate characteristics in hot summer and cold winter zone make residents form a habit of using the energy intermittently, which reflects a good energy saving property and should be maintained.
However, the effect of natural ventilation is also greatly affected by the outdoor environment: outdoor temperature, temperature difference and outdoor wind speed.
Meanwhile, residential building’s requirement for ventilation in hot summer and cold winter area mainly focuses on two parts: on one hand it mainly focuses on nighttime cooling in summer and daytime cooling in transition season; on the other hand the indoor air must be kept fresh, ventilated effect permanent without being affected by factors such as weather, noise, privacy, etc.
In view of the above, ventilation pattern in hot summer and cold winter zone must be a mixed one, combining natural ventilation and mechanical ventilation[5].
Conclusions (1) The climate characteristics in hot summer and cold winter zone of China make residents forming the habit of using the energy intermittently that reflects a good energy saving property and should be maintained
However, the effect of natural ventilation is also greatly affected by the outdoor environment: outdoor temperature, temperature difference and outdoor wind speed.
Meanwhile, residential building’s requirement for ventilation in hot summer and cold winter area mainly focuses on two parts: on one hand it mainly focuses on nighttime cooling in summer and daytime cooling in transition season; on the other hand the indoor air must be kept fresh, ventilated effect permanent without being affected by factors such as weather, noise, privacy, etc.
In view of the above, ventilation pattern in hot summer and cold winter zone must be a mixed one, combining natural ventilation and mechanical ventilation[5].
Conclusions (1) The climate characteristics in hot summer and cold winter zone of China make residents forming the habit of using the energy intermittently that reflects a good energy saving property and should be maintained
Online since: May 2011
Authors: Lin Li, Jing Da, Zhao Yang Ding, Zhi Tong Sui, Qing Wang
Erosion damage of concrete is considered as one of the four factors that caused the failure of concrete material[1,2,3].
It is because the polymerization reacted completely in the geopolymer matrix and formed compact three-dimensional network structure which made the samples hard to erode and performed excellent sulfate resistance property[8,9].
Low-calcium fly ash-based geopolymer concrete: long-term properties. 2006
[10] M.Luz Granizo,M.T.Blanco-Varela,S.Martı´nez-Ramı´rez.Alkali activation of metakaolins: parameters affecting mechanical, structural and microstructural properties[J].
It is because the polymerization reacted completely in the geopolymer matrix and formed compact three-dimensional network structure which made the samples hard to erode and performed excellent sulfate resistance property[8,9].
Low-calcium fly ash-based geopolymer concrete: long-term properties. 2006
[10] M.Luz Granizo,M.T.Blanco-Varela,S.Martı´nez-Ramı´rez.Alkali activation of metakaolins: parameters affecting mechanical, structural and microstructural properties[J].
Online since: January 2005
Authors: Seh Wan In, Sang Kwon Jeong, Youn Mi Park
In such an
arrangement, the crucial factor determining the weight of the pressurization system is the volume of
the liquid helium tank.
To optimize the total mass of the pressurization system, we consider the three factors with respect to the change of the volume of the tank, and find the optimal tank size.
The heater design is an important factor to the overall design of the pressurization system, because the heater material and design influence the heater efficiency 3, which directly affects the choice of battery.
Analysis for Heater Design The efficiency of a heater affects the required mass of battery.
The properties of the materials significantly change due to even slight variation of the temperature near critical state.
To optimize the total mass of the pressurization system, we consider the three factors with respect to the change of the volume of the tank, and find the optimal tank size.
The heater design is an important factor to the overall design of the pressurization system, because the heater material and design influence the heater efficiency 3, which directly affects the choice of battery.
Analysis for Heater Design The efficiency of a heater affects the required mass of battery.
The properties of the materials significantly change due to even slight variation of the temperature near critical state.
Online since: September 2023
Authors: Vamsi Krishna Pasam, Gamidi Kartheek, Suryachandra Rankireddy, Lingaraju Dumpala
Introduction
Ti6Al4V is widely used in aerospace, missiles, aviation and automotive industries because of its mechanical properties like high strength to weight ratio, corrosive resistance and ability to withstand elevated temperatures.
Cutting speed and amplitude were the most influencing factors in cutting force reduction.
Interaction of cutting speed and feed rate were the most influencing factors.
Factors and their levels Factor Level 1 Level 2 Level 3 Cutting speed (V) [m/min] 10 30 50 Feed rate (f) [mm/rev] 0.051 0.103 0.161 Depth of cut (d) [mm] 0.1 0.2 0.3 Amplitude (a) [µm] 20 22.5 25 Fig 1.
With the increase in depth of cut, surface roughness is not much affected.
Cutting speed and amplitude were the most influencing factors in cutting force reduction.
Interaction of cutting speed and feed rate were the most influencing factors.
Factors and their levels Factor Level 1 Level 2 Level 3 Cutting speed (V) [m/min] 10 30 50 Feed rate (f) [mm/rev] 0.051 0.103 0.161 Depth of cut (d) [mm] 0.1 0.2 0.3 Amplitude (a) [µm] 20 22.5 25 Fig 1.
With the increase in depth of cut, surface roughness is not much affected.
Online since: August 2014
Authors: Yan Guan, Zhe Chen
A thing exists for its own reason and is constraint by various external factors.
The physical property, like quality, color and texture of materials, chemical property, like corrosion resistance, antioxidation and mechanical property, like strength, hardness, rigidity and extension convey their information, like what I am, what I can do and how to do.
Various properties compose materials and different properties bring different artistic appreciations.
These qualitative identifications for materials are affected by region, environment and culture, etc.
The design of materials should consider relevant factors comprehensively.
The physical property, like quality, color and texture of materials, chemical property, like corrosion resistance, antioxidation and mechanical property, like strength, hardness, rigidity and extension convey their information, like what I am, what I can do and how to do.
Various properties compose materials and different properties bring different artistic appreciations.
These qualitative identifications for materials are affected by region, environment and culture, etc.
The design of materials should consider relevant factors comprehensively.