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Online since: July 2017
Authors: Roland Pawliczek, Piotr Soppa
This induces dynamic processes within the electro-mechanical components of the motor [1,2].
Then, in a secondary mechanical circuit a rotor makes a rotation by clearly defined angle.
This paper assumes that control and measurement systems shall involve only electric properties and the proposed solution shall be universal, allowing simple reconfigurability of measurements while keeping the same or slightly modified equipment.
Due to the fact that assumption involves only electrical properties there is no need to use any additional sensors or transducers.
It shall be noted that capacities of operating system are a limiting factor of system speed and performance.
Then, in a secondary mechanical circuit a rotor makes a rotation by clearly defined angle.
This paper assumes that control and measurement systems shall involve only electric properties and the proposed solution shall be universal, allowing simple reconfigurability of measurements while keeping the same or slightly modified equipment.
Due to the fact that assumption involves only electrical properties there is no need to use any additional sensors or transducers.
It shall be noted that capacities of operating system are a limiting factor of system speed and performance.
Online since: January 2009
Authors: Han Huang
In particular, the
subsurface damage was found to be insignificantly affected by the increase in depth of cut [29,
30].
The material properties of the ceramics are also summarized in Table 2.
Subsurface characteristics of the ceramics showed that the material removal mechanisms associated with the high speed grinding were influenced by their microstructures and mechanical properties [30].
This result agrees with the relationship between the normal grinding forces and the ceramic material properties in conventional grinding [18].
Coolant supply was another key factor in the high speed grinding of advanced ceramics.
The material properties of the ceramics are also summarized in Table 2.
Subsurface characteristics of the ceramics showed that the material removal mechanisms associated with the high speed grinding were influenced by their microstructures and mechanical properties [30].
This result agrees with the relationship between the normal grinding forces and the ceramic material properties in conventional grinding [18].
Coolant supply was another key factor in the high speed grinding of advanced ceramics.
Online since: August 2019
Authors: Taliat Azizov, Wit Derkowski, Nadzieja Jurkowska
Experimental studies [10] prove that these factors influence on the redistribution of forces between individual floor slabs and should be taken into account in the calculations.
However, even in these works little attention was paid to taking into account the nonlinear properties of concrete when determining the torsional stiffness of the rod element.
Despite the fact that it does not greatly affect the overall work of the floor, with sufficiently flexible beams by which the slabs are supported, the flexibility of the slab supports should be taken into account.
In this case, calculations should be carried out to determine torsional stiffness, taking into account the nonlinear properties of concrete.
For automated calculation of floor taking into account spatial work, practical algorithms should be created that take into account all possible factors for changing torsional and bending stiffness, as well as taking into account the drawbacks of using equations like (2) when taking into account the bending and torsional stiffness that vary over the span length of hollow-core slabs.
However, even in these works little attention was paid to taking into account the nonlinear properties of concrete when determining the torsional stiffness of the rod element.
Despite the fact that it does not greatly affect the overall work of the floor, with sufficiently flexible beams by which the slabs are supported, the flexibility of the slab supports should be taken into account.
In this case, calculations should be carried out to determine torsional stiffness, taking into account the nonlinear properties of concrete.
For automated calculation of floor taking into account spatial work, practical algorithms should be created that take into account all possible factors for changing torsional and bending stiffness, as well as taking into account the drawbacks of using equations like (2) when taking into account the bending and torsional stiffness that vary over the span length of hollow-core slabs.
Online since: August 2023
Authors: Tahseen A. Al-Hattab, Alaa Hasan Kassi
Because of their better mechanical properties and high gas selectivity, glassy polymer membranes were more practical for commercial applications than rubber polymeric membranes.
The efficiency of any reactor is assessed using a variety of operational factors and design considerations, such as the ratio of reactant in the feed, temperature, pressure, membrane properties, the kind of catalyst, the rate of sweep gas, etc.
This review will focus on the best membrane to use depending on the amount of hydrogen permeability, which is influenced by a number of different factors, including temperature, pressure, catalyst type, feed rate, sweep gas flow rate, feed purity, and reactor type depending on how the catalyst is arranged in the membrane.
An unusual packed bed reactor and a membrane reactor have both been explored to see how reactor geometry affects temperature and profiles of hydrogen and methane concentrations.
The efficiency of any reactor is assessed using a variety of operational factors and design considerations, such as the ratio of reactant in the feed, temperature, pressure, membrane properties, the kind of catalyst, the rate of sweep gas, etc.
This review will focus on the best membrane to use depending on the amount of hydrogen permeability, which is influenced by a number of different factors, including temperature, pressure, catalyst type, feed rate, sweep gas flow rate, feed purity, and reactor type depending on how the catalyst is arranged in the membrane.
An unusual packed bed reactor and a membrane reactor have both been explored to see how reactor geometry affects temperature and profiles of hydrogen and methane concentrations.
Online since: July 2025
Authors: Marcel Dickmann, Werner Egger, Ricardo Helm, Johann Antonio Duffek, Piet Jarmatz, Günther Dollinger, Johannes Mitteneder
Understanding the fundamental properties of diamond at the atomic level is crucial when optimizing
its performance in these applications.
Computational Details For our calculations, we used ABINIT [7, 8, 9, 10, 11], an open-source software designed for DFT computations of electronic densities and related material properties.
This correlation is crucial for identifying the nature and size of vacancy clusters in diamond, which has implications for understanding material properties and defect dynamics.
This finding is essential for comprehending the influence of grain boundaries on the electronic and structural properties of diamond.
Properties of optically active vacancy clusters in type IIa diamond.
Computational Details For our calculations, we used ABINIT [7, 8, 9, 10, 11], an open-source software designed for DFT computations of electronic densities and related material properties.
This correlation is crucial for identifying the nature and size of vacancy clusters in diamond, which has implications for understanding material properties and defect dynamics.
This finding is essential for comprehending the influence of grain boundaries on the electronic and structural properties of diamond.
Properties of optically active vacancy clusters in type IIa diamond.
Online since: October 2024
Authors: Saad Saud Ali Shah, Noor Ali, Zeeshan Habib, Sana Taimoor, Nasir Mehboob, Fazal Ur Rehman
In comparison of optoelectronic properties, RF magnetron sputtered zinc sulfide thin films exhibit best structural and optoelectronic properties for buffer layer in second generation solar cells.
In this paper, structural, morphological, optical, and electrical properties of ZnS thin films were analyzed and compared to fabricate thin films with best properties as a buffer layer for second generation photovoltaics.
Table 4 shows the optical properties of ZnS thin films fabricated by spin coating and RF magnetron sputtering.
It is cleared that RF magnetron sputtered ZnS thin films have best optical properties as compared to spin coated ZnS thin films.
Negative value of average Hall coefficient shows that fabricated thin films exhibit n-type semiconductor properties.
In this paper, structural, morphological, optical, and electrical properties of ZnS thin films were analyzed and compared to fabricate thin films with best properties as a buffer layer for second generation photovoltaics.
Table 4 shows the optical properties of ZnS thin films fabricated by spin coating and RF magnetron sputtering.
It is cleared that RF magnetron sputtered ZnS thin films have best optical properties as compared to spin coated ZnS thin films.
Negative value of average Hall coefficient shows that fabricated thin films exhibit n-type semiconductor properties.
Online since: December 2023
Authors: Adebowale Martins Obalalu, Amos Wale Ogunsola, Olusegun Adebayo Ajala, Oladapo Olayinka Akeem, Akintayo Oladimeji Akindele
Due to its rheological properties, CF is one of the most often used non-Newtonian fluids.
Mjankwi [12] investigated the effects that thermal radiation and chemical reaction on a MHD flow of NF with variable transport properties that was moving across a stretching sheet.
(11) Local skin friction factor is Therefore, the skin drag coefficientis given as: (12) Where is the local Reynolds number.
By increasing M, the temperature profile for magnetic parameter is greatly affected.
Unsteady MHD Flow of Nanofluid with Variable Properties over a Stretching Sheet in the Presence of Thermal Radiation and Chemical Reaction.
Mjankwi [12] investigated the effects that thermal radiation and chemical reaction on a MHD flow of NF with variable transport properties that was moving across a stretching sheet.
(11) Local skin friction factor is Therefore, the skin drag coefficientis given as: (12) Where is the local Reynolds number.
By increasing M, the temperature profile for magnetic parameter is greatly affected.
Unsteady MHD Flow of Nanofluid with Variable Properties over a Stretching Sheet in the Presence of Thermal Radiation and Chemical Reaction.
Online since: July 2012
Authors: Hong Guang Zheng, Rong Ying Huang, Qiang Xu
Material properties were derived from the data available in the literature.
Ligaments were modelled as non-linear hyperelastic fibered materials, and the mechanical properties were obtained from previous works [25, 26, 27].
The mechanical property of patellar tendon patellar tendon (PT) [12] was used for the grafts.
Stress-strain properties of ligament and grafts.
[24] C.S Proctor, M.B Schmidt, M.A Kelly, V.C Mow, Material properties of the normal medial bovine meniscus, J.
Ligaments were modelled as non-linear hyperelastic fibered materials, and the mechanical properties were obtained from previous works [25, 26, 27].
The mechanical property of patellar tendon patellar tendon (PT) [12] was used for the grafts.
Stress-strain properties of ligament and grafts.
[24] C.S Proctor, M.B Schmidt, M.A Kelly, V.C Mow, Material properties of the normal medial bovine meniscus, J.
Online since: August 2014
Authors: Petr Huňka, Stanislav Rehacek, David Citek, Hana Sachova, Jiří Kolisko
HVFAC is specially designed and final properties depend on combination of raw material, additives, admixtures and especially on quality of fly ash.
Basic material properties of fresh and hardened concrete are presented (slump test, air content, compressive strength etc.). 1.
Adsorption behaviour of proposed formula of superplasticificator can be purposefully affected by suitable combination of selected bases.
Measurements performed on all tested concrete formulations proved that the most significant factor influencing development of temperatures during hydration is the cement content.
While common concretes according to ČSN EN 206-1 contain substitution of cement with fly-ash on the level of about 10 % of weight, the our proposed concept of FAC allows obtaining of substitution higher than 30 % of weight with the same standard strength class of concrete, allowing comfortable de-moulding and equal or even better physical and mechanical parameters (long-term strengths, volume changes, development of hydration heat) and parameters of durability (resistance against carbonatation, water-tightness).
Basic material properties of fresh and hardened concrete are presented (slump test, air content, compressive strength etc.). 1.
Adsorption behaviour of proposed formula of superplasticificator can be purposefully affected by suitable combination of selected bases.
Measurements performed on all tested concrete formulations proved that the most significant factor influencing development of temperatures during hydration is the cement content.
While common concretes according to ČSN EN 206-1 contain substitution of cement with fly-ash on the level of about 10 % of weight, the our proposed concept of FAC allows obtaining of substitution higher than 30 % of weight with the same standard strength class of concrete, allowing comfortable de-moulding and equal or even better physical and mechanical parameters (long-term strengths, volume changes, development of hydration heat) and parameters of durability (resistance against carbonatation, water-tightness).
Online since: December 2013
Authors: Hua Li, Li Li Feng, Bi Hao Lan, Lu Zhang, Hui Ying Chen, Ling Yu Tan, Xiao Ye Hong
In particular, silica microspheres as important technical materials, have received considerable attention due to its special properties and potential applications in many fields.
There are various types of manipulators are available, we can cite: laser tweezers and mechanical grippers [15] etc.
Theory Subjected to a non-uniform electric field, a neutral but polarizable particle experiences a time-averaged DEP force FDEP, the FDEP in an AC field is given by FDEP=2πR3εmRe[K(ω)]▽E2 (1) where R is the radius of the particle, εm the permittivity of the suspending medium, ω the field frequency, E the root mean square (RMS) value of the electric field and Re[K(ω)] is the real part of the Claussius–Mossotti factor which describes the relationship between the complex permittivities of the particle and the medium [22].
Besides polarizability, the applied frequency also affects the direction of DEP [23].
Miyake, Preparation and CO2 adsorption properties of aminopropyl-functionalized mesoporous silica microspheres, Journal of Colloid and Interface Science, 339 (2009) 382-389
There are various types of manipulators are available, we can cite: laser tweezers and mechanical grippers [15] etc.
Theory Subjected to a non-uniform electric field, a neutral but polarizable particle experiences a time-averaged DEP force FDEP, the FDEP in an AC field is given by FDEP=2πR3εmRe[K(ω)]▽E2 (1) where R is the radius of the particle, εm the permittivity of the suspending medium, ω the field frequency, E the root mean square (RMS) value of the electric field and Re[K(ω)] is the real part of the Claussius–Mossotti factor which describes the relationship between the complex permittivities of the particle and the medium [22].
Besides polarizability, the applied frequency also affects the direction of DEP [23].
Miyake, Preparation and CO2 adsorption properties of aminopropyl-functionalized mesoporous silica microspheres, Journal of Colloid and Interface Science, 339 (2009) 382-389