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Online since: January 2014
Authors: Long Min Jiang, Hong Jun Li, Lei Liu, Jin Dan Zhang
This method can greatly improve the compressive performance and bending property of structural components.
It is reliable and easily operated with less work on site, but a large amount of steels are required, and it will be obviously affected when used in high temperature with no protection.
(a) Hysteresis curve before reinforcement (b) Hysteresis curve after reinforcement Figure 4- Hysteresis curve James Paterson, Denis Mitchell, M.ASCE [14] pointed out that there were several factors to enhance the ductility of shear walls.
[2] Xide Li, Bingyan Xu, Zhenhua Sun: Research on the mechanical characteristics of concrete reinforced with carbon fiber, Building Technique Development, In Chinese, June, (2002)
It is reliable and easily operated with less work on site, but a large amount of steels are required, and it will be obviously affected when used in high temperature with no protection.
(a) Hysteresis curve before reinforcement (b) Hysteresis curve after reinforcement Figure 4- Hysteresis curve James Paterson, Denis Mitchell, M.ASCE [14] pointed out that there were several factors to enhance the ductility of shear walls.
[2] Xide Li, Bingyan Xu, Zhenhua Sun: Research on the mechanical characteristics of concrete reinforced with carbon fiber, Building Technique Development, In Chinese, June, (2002)
Online since: June 2020
Authors: Abdelkader Djelloul, Djamel Hamana, Sabrina Iaiche, Chahra Boukaous, David Alamarguy
ZnAl2O4 is of interest due to its combination of desirable properties such as high mechanical resistance, high thermal and chemical stability, high fluorescence efficiency, high photocatalytic activity and low surface acidity [20].
Zn2SiO4 is a wide band gap (Eg = 5.5 eV) oxide possess fascinating luminescent and physicochemical properties, such as good chemical stability, mechanical strength, thermal conductivity and low coefficient of thermal expansion, color purity, and better wear resistance [22].
Mahalingam, Properties Evaluation of Annealed ZnAl2O4 Alloy Thin Films, Dig.
Water, The structural and optical properties of ZnO/Si thin films by RTA treatments, App.
Hsiao, The crystallization and physical properties of Al-doped ZnO nanoparticles, App.
Zn2SiO4 is a wide band gap (Eg = 5.5 eV) oxide possess fascinating luminescent and physicochemical properties, such as good chemical stability, mechanical strength, thermal conductivity and low coefficient of thermal expansion, color purity, and better wear resistance [22].
Mahalingam, Properties Evaluation of Annealed ZnAl2O4 Alloy Thin Films, Dig.
Water, The structural and optical properties of ZnO/Si thin films by RTA treatments, App.
Hsiao, The crystallization and physical properties of Al-doped ZnO nanoparticles, App.
Online since: November 2021
Authors: Aditi Paul, Indu Pandey
The study also stated that mechanical and human based external sources contain distinct harvesting capabilities which results to predict the efficiency of the harvester.
The amount of energy that a sensor harvest suffers from significant error due to inherent degradation properties of the materials used.
The number of low energy nodes depends on network density, payload and other factors and if this number is very high then selecting optimum path will be challenging.
Transmission scheduling is an important factor introduced here.
Thus geographical location affects the power sustainability in such areas.
The amount of energy that a sensor harvest suffers from significant error due to inherent degradation properties of the materials used.
The number of low energy nodes depends on network density, payload and other factors and if this number is very high then selecting optimum path will be challenging.
Transmission scheduling is an important factor introduced here.
Thus geographical location affects the power sustainability in such areas.
Online since: January 2013
Authors: Ya Hong Chen, Zhong Xu Han
In real-world engineering problems there are a variety of nonlinear factors with time-varying characteristics usually.
Given time-varying characteristics Hammerstein model[27] expressed by the joint expression of some controlled linear slow time-varying multi-input and multi-output observed system with n dimensions (3) (3) and a group of high-order polynomials representing nonlinear gains (4) (4) In which, are time-varying real matrices with appropriate order, is diagonal matrix with appropriate order, on behalf of some uncertainty factors (such as calorific value of the coal contained in unit coordinated control system of thermal power plants in thermal control ) [28].
The Relationship of the Methods between System Analysis and Integration On the property, system integration and system analysis are a pair of opposite propositions summed up by classical control theory.
As a study case of system integration approach, several important parameters are first given as complementary indicators to system integration, which are measurable in the process of system debugging and also are intuitive and actionable. the realization of performance indicators of control system will be affected by their advantages and shortcomings, so, they are usually designed and debugged repetitively.
Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 2007, 221(6): 843-855 [34] LU Qiang, HE Guangyu, MEI Shengwei, et al.
Given time-varying characteristics Hammerstein model[27] expressed by the joint expression of some controlled linear slow time-varying multi-input and multi-output observed system with n dimensions (3) (3) and a group of high-order polynomials representing nonlinear gains (4) (4) In which, are time-varying real matrices with appropriate order, is diagonal matrix with appropriate order, on behalf of some uncertainty factors (such as calorific value of the coal contained in unit coordinated control system of thermal power plants in thermal control ) [28].
The Relationship of the Methods between System Analysis and Integration On the property, system integration and system analysis are a pair of opposite propositions summed up by classical control theory.
As a study case of system integration approach, several important parameters are first given as complementary indicators to system integration, which are measurable in the process of system debugging and also are intuitive and actionable. the realization of performance indicators of control system will be affected by their advantages and shortcomings, so, they are usually designed and debugged repetitively.
Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 2007, 221(6): 843-855 [34] LU Qiang, HE Guangyu, MEI Shengwei, et al.
Online since: August 2015
Authors: Hardev Singh Virk
We observed that annealing over geologic times affects the fission track (FT) ages of micaceous minerals (muscovite, biotite and phlogopite) in pegmatites.
(ii) Electrostatic and mechanical stresses due to Coulomb forces relax.
They conclude: (i) Activation energy of annealing of nuclear tracks is a characteristic property of the detector material.
Bhatia, Activation energy for the annealing of radiation damage in CR-39 : An intrinsic property of detector, Nucl.
Virk, Correction for thermally affected fission tracks in glass (obsidian) by age plateau method, Curr.
(ii) Electrostatic and mechanical stresses due to Coulomb forces relax.
They conclude: (i) Activation energy of annealing of nuclear tracks is a characteristic property of the detector material.
Bhatia, Activation energy for the annealing of radiation damage in CR-39 : An intrinsic property of detector, Nucl.
Virk, Correction for thermally affected fission tracks in glass (obsidian) by age plateau method, Curr.
Online since: September 2007
Authors: Hiroyuki Matsunami, Tsunenobu Kimoto, Katsunori Danno, T. Hori
All of these defects should severely affect the
performance and reliability of SiC bipolar devices.
The properties and possible origins of deep levels observed in n- and p-type 4H-SiC are discussed.
Without this correction, the trap concentration is underestimated by a factor of about 1.5-3.
Chemical mechanical polishing (CMP) of substrates and optimization of in-situ H2 etching process were effective to obtain such morphology at high growth rate.
The properties and possible origins of deep levels observed in n- and p-type 4H-SiC are discussed.
Without this correction, the trap concentration is underestimated by a factor of about 1.5-3.
Chemical mechanical polishing (CMP) of substrates and optimization of in-situ H2 etching process were effective to obtain such morphology at high growth rate.
Online since: April 2021
Authors: Jin Zhe Chen, Ge Ping Bi
Introduction
At present, in the process of production and application of metal materials, the routine test activities are to test the appearance, geometric dimension, mechanical performance, technological performance, physical performance, metallographic structure, nondestructive testing, and so on.
The purpose of parameter estimation is to infer the distribution and digital characteristics of the unknown population through the known samples, and strive to make the estimator meet the properties of unbiased, effective and consistent, so that the estimation has a higher accuracy.
The purpose of studying extreme value distribution is to extract as reliable and accurate information as possible from the observation data that have been affected by randomness or observation data of random phenomena, so as to estimate the probability of extreme events that have not occurred and will occur in return period and in special circumstances [7].
It can be seen that there are certain risks in the production process of the piston rod, and improvement or safety factor should be considered.
The purpose of parameter estimation is to infer the distribution and digital characteristics of the unknown population through the known samples, and strive to make the estimator meet the properties of unbiased, effective and consistent, so that the estimation has a higher accuracy.
The purpose of studying extreme value distribution is to extract as reliable and accurate information as possible from the observation data that have been affected by randomness or observation data of random phenomena, so as to estimate the probability of extreme events that have not occurred and will occur in return period and in special circumstances [7].
It can be seen that there are certain risks in the production process of the piston rod, and improvement or safety factor should be considered.
Online since: April 2015
Authors: Flávio Medeiros Seibt, Elizaldo Domingues dos Santos, Maria Fernanda Espinel Lara, Silvana Letícia Pires Iahnke, Marcelo Moraes Goulart, Bianca Neves Machado, Mateus das Neves Gomes, Liércio André Isoldi, Luiz Alberto Oliveira Rocha
According to [8], another factor that can cause a disturbance in free water surface is the action of the winds.
An equation describing the motion of the free surface can also be highlighted: (10) The other theory mentioned above, the theory of Stokes, consists in assuming that the properties of wave motion, as the velocity potential, can be represented by a series of small perturbations [7].
Moreover, under-relaxation factors of 0.3 and 0.7 are imposed for the conservation equations of continuity and momentum, respectively.
So, to use these opposite air movements usually the Wells turbine is employed, which has the property of maintaining the rotation direction irrespective of the flow direction.
In the submergence S = 5.0 m where higher overtopping occurred, it can be noticed that there is the occurrence of several peaks, which are influenced by the reflection of the wave that focuses on the ramp (reflection of the water that does not climbed the ramp and then that water falls down colliding with the incident wave and affecting the new amount of water that enters the tank).
An equation describing the motion of the free surface can also be highlighted: (10) The other theory mentioned above, the theory of Stokes, consists in assuming that the properties of wave motion, as the velocity potential, can be represented by a series of small perturbations [7].
Moreover, under-relaxation factors of 0.3 and 0.7 are imposed for the conservation equations of continuity and momentum, respectively.
So, to use these opposite air movements usually the Wells turbine is employed, which has the property of maintaining the rotation direction irrespective of the flow direction.
In the submergence S = 5.0 m where higher overtopping occurred, it can be noticed that there is the occurrence of several peaks, which are influenced by the reflection of the wave that focuses on the ramp (reflection of the water that does not climbed the ramp and then that water falls down colliding with the incident wave and affecting the new amount of water that enters the tank).
Online since: October 2023
Authors: Antonio Guerra-Sancho, María Henar Miguélez, José Luis Cantero, Carlos Domínguez-Monferrer
Catastrophic Tool Failure Detection in Aeronautical Industrial Drilling Systems Based on Spindle Power Consumption Analysis
Antonio Guerra-Sancho1,a*, Carlos Domínguez-Monferrer1,b,
María Henar Miguélez1,c, José Luis Cantero1,d
1Department of Mechanical Engineering, Universidad Carlos III de Madrid,
Avda. de la Universidad 30, Leganés, Madrid, 28911, Spain
aantguerr@ing.uc3m.es, bcardomin@ing.uc3m.es,
cmhmiguel@ing.uc3m.es, djcantero@ing.uc3m.es
*Corresponding author
Keywords: Drilling Monitoring, Catastrophic Tool Failure, Data Analytics, Industry 4.0.
In such cases, it may become necessary to halt drilling activities and manually fix the affected region, causing significant production delays.
The goal is to identify patterns, trends, and relationships within an automatic drilling industrial system's data to understand its properties and characteristics better and develop a Catastrophic Tool Failure detection system.
According to the results, the Ti6Al4V layer thickness in the hybrid stack is the most influential factor in breakage.
In such cases, it may become necessary to halt drilling activities and manually fix the affected region, causing significant production delays.
The goal is to identify patterns, trends, and relationships within an automatic drilling industrial system's data to understand its properties and characteristics better and develop a Catastrophic Tool Failure detection system.
According to the results, the Ti6Al4V layer thickness in the hybrid stack is the most influential factor in breakage.
Online since: March 2008
Authors: Christophe Maleville, Eric Neyret, Daniel Delprat, Ludovic Ecarnot
Natural option for roughness improvement is chemical-mechanical polishing (CMP).
Efficiency to remove those contaminants is the key factor in the ambient management.
During high temperature processes, any contaminants can diffuse towards all the different elements in the chamber and can affect products performance after processing at high temperature.
Compared to bulk SOI has some specificities mainly due to the reflective properties of the stack and the edge crown.
Efficiency to remove those contaminants is the key factor in the ambient management.
During high temperature processes, any contaminants can diffuse towards all the different elements in the chamber and can affect products performance after processing at high temperature.
Compared to bulk SOI has some specificities mainly due to the reflective properties of the stack and the edge crown.