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Online since: August 2017
Authors: Winai Ouypornprasert, Narong Traitruengtatsana, Kong Kamollertvara
Although actual engineering data showed some skewness [1], normal distributions could be applied conservatively [2].
Based on this the most suitable mean value for each specification for mass production could be further inversely determined from existing engineering data using the formulations proposed.
Furthermore the best-fitted distribution of a set of data obtained by the Goodness-of-Fit tests, e.g. the Chi-Square test and the K-S test, might be non-normal [3].
Taking into account lower and suitable type of distribution could lead to significant reduction of production cost.
Based on this the most suitable mean value for each specification for mass production could be further inversely determined from existing engineering data using the formulations proposed.
Furthermore the best-fitted distribution of a set of data obtained by the Goodness-of-Fit tests, e.g. the Chi-Square test and the K-S test, might be non-normal [3].
Taking into account lower and suitable type of distribution could lead to significant reduction of production cost.
Online since: October 2009
Authors: Ferri M.H.Aliabadi, P.M. Baiz, Z. Sharif-Khodaei
Homan [6] proposed an analytical 2D approach to estimate the fatigue
crack initiation life of composite metallic laminates based on the actual stress level in the Al layers
and empirical S-N data.
It is well known that fatigue crack propagation could be affected by many parameters (loading, temperature, environment, etc.); therefore different laws have been proposed to represent this dependence using mainly empirical fits to the test data.
Results show expected life reduction when initial cracks are present.
[3] Boller, C., Seeger, T., Materials Data for Cyclic Loading, Part D: Aluminium and Titanium Alloys, Elsevier, Amsterdam (1987)
It is well known that fatigue crack propagation could be affected by many parameters (loading, temperature, environment, etc.); therefore different laws have been proposed to represent this dependence using mainly empirical fits to the test data.
Results show expected life reduction when initial cracks are present.
[3] Boller, C., Seeger, T., Materials Data for Cyclic Loading, Part D: Aluminium and Titanium Alloys, Elsevier, Amsterdam (1987)
Online since: June 2007
Authors: Hong Wei Ma, Gui Tong Yang, Long Mao Zhao, Zhi Hua Wang
It is noted that, as mentioned above, only limited data are available for the effect of
cell size on compressive properties of aluminum foams, especially for the dynamic compressive
properties.
It is not accurate to process the experimental data using one-dimensional stress wave propagation theory.
The value of K in Eq.1 is about 0.3, which was approved by the data from many open cell metallic foams [6].
The reduction in strength properties owing to this size effect is caused by the reduced constraint of the cell walls at the free surface coupled with an increased area fraction of stress free cell walls.
It is not accurate to process the experimental data using one-dimensional stress wave propagation theory.
The value of K in Eq.1 is about 0.3, which was approved by the data from many open cell metallic foams [6].
The reduction in strength properties owing to this size effect is caused by the reduced constraint of the cell walls at the free surface coupled with an increased area fraction of stress free cell walls.
Online since: September 2007
Authors: Shigenobu Kainuma, Naofumi Hosomi, In Tae Kim
The fatigue test data are plotted in an S-N diagram, as shown in Fig.5.
The vertical-axis in Fig.5(a) indicates the nominal stress range ∆σn of a net cross-section of the specimens considering the reduction in plate thickness due to corrosion.
The fatigue strength of the test data varied from class JSSC-F to JSSC-A because the stress concentration changed with the dimensions and shape of the corrosion pits.
The thick solid line is the mean regression line calculated from test data with a slope of 3.
The vertical-axis in Fig.5(a) indicates the nominal stress range ∆σn of a net cross-section of the specimens considering the reduction in plate thickness due to corrosion.
The fatigue strength of the test data varied from class JSSC-F to JSSC-A because the stress concentration changed with the dimensions and shape of the corrosion pits.
The thick solid line is the mean regression line calculated from test data with a slope of 3.
Online since: July 2012
Authors: Qiao Ling Guo, Kui Huang
Combined data acquisition, communications, networking, databases and other modern information technology, reservoir dispatching automation system is the operational system used for reservoir scheduling[2].
This platform includes infrastructure, application support platform, applications, operating system environment and organizational security, technical standards, policies and so on. 2 The computer network system In the information society, people rely on the network strongly, more and more information and data resources have been stored and transmited in the network [3].
Take full advantage of the log function of operating and applications systems, record the information accessed by users, and provide the basis for the ex post facto review. 2.2.2 Border security and network security Access control is the core content of the information security mechanisms, it is the primary means to realize data confidentiality and integrity mechanisms.
Wireless LAN technology is used in the Digital Yellow River construction, it has provided communication transmission for Digital Yellow River Project on flood control and disaster reduction, water conservation and reservoir scheduling, promote Yellow River information construction to develop in depth.
This platform includes infrastructure, application support platform, applications, operating system environment and organizational security, technical standards, policies and so on. 2 The computer network system In the information society, people rely on the network strongly, more and more information and data resources have been stored and transmited in the network [3].
Take full advantage of the log function of operating and applications systems, record the information accessed by users, and provide the basis for the ex post facto review. 2.2.2 Border security and network security Access control is the core content of the information security mechanisms, it is the primary means to realize data confidentiality and integrity mechanisms.
Wireless LAN technology is used in the Digital Yellow River construction, it has provided communication transmission for Digital Yellow River Project on flood control and disaster reduction, water conservation and reservoir scheduling, promote Yellow River information construction to develop in depth.
Online since: April 2014
Authors: V.G. Myagkov, G.N. Bondarenko, Liudmila E. Bykova, Victor S. Zhigalov, I.A. Tambasov, O.A. Bayukov, Y.L. Mikhlin, I.V. Nemtsev
Oxidation in air led to the formation of an α-Fe2O3 phase and a sharp reduction of magnetization down to 20 emu/cm3.
The Mossbauer data of the starting Zn/Fe2O3 bilayers shows the formation of primary α-Fe2O3 (~ 67%) and secondary γ-Fe2O3 phases (~33%) Fig. 2a.
X-ray data and the occurrence of magnetization at 250 °C, along with its subsequent growth, indicates the mixing of the Zn and Fe2O3 layers of Zn/Fe2O3 films following the solid-phase reaction (1).
This data is consistent with the results of the Mössbauer and X-ray studies indicating the formation of the ZnO-Fe3O4 nanocomposites after annealing at 400 °C.
The Mossbauer data of the starting Zn/Fe2O3 bilayers shows the formation of primary α-Fe2O3 (~ 67%) and secondary γ-Fe2O3 phases (~33%) Fig. 2a.
X-ray data and the occurrence of magnetization at 250 °C, along with its subsequent growth, indicates the mixing of the Zn and Fe2O3 layers of Zn/Fe2O3 films following the solid-phase reaction (1).
This data is consistent with the results of the Mössbauer and X-ray studies indicating the formation of the ZnO-Fe3O4 nanocomposites after annealing at 400 °C.
Online since: February 2014
Authors: Jonathan P. Goss, Alton B. Horsfall, David T. Clark, Ewan P. Ramsay, A.E. Murphy, Robin. F. Thompson, R.A.R. Young, Hua Khee Chan, Nicholas G. Wright, Lucy Claire Martin, Dave A. Smith
As shown by the data in fig. 2, sample B has a consistently higher transconductance and higher drain current in the strong inversion region than sample A.
Sample A shows a consistently higher noise characteristic than Sample B in the weak inversion region, as illustrated by the data in figs. 3 and 4.
The data in fig. 5 shows that sample B has a lower interface trap density (Dit) for energies between 0.2 eV and 0.5 eV from the conduction band edge, as extracted using the Terman method on capacitor structures fabricated monolithically with the transistors [3].
The study highlights that a thermally grown dielectric at the interface acts to improve device performance through the reduction of Dit.
Sample A shows a consistently higher noise characteristic than Sample B in the weak inversion region, as illustrated by the data in figs. 3 and 4.
The data in fig. 5 shows that sample B has a lower interface trap density (Dit) for energies between 0.2 eV and 0.5 eV from the conduction band edge, as extracted using the Terman method on capacitor structures fabricated monolithically with the transistors [3].
The study highlights that a thermally grown dielectric at the interface acts to improve device performance through the reduction of Dit.
Online since: November 2015
Authors: Neculai Eugen Seghedin, Dragoş Florin Chitariu
.);
E7 – establishing of the research equipments (transducers, data acquisition cards, signals conditioning systems, computers, frequency analyzers etc.;
E8 – establishing of the programming language for the data control, analysis and displaying;
E9 – choosing (designing) of the virtual instruments for the data control, analysis and displaying;
E10 – establishing of the variable parameters of the virtual instruments (sampling ratio, window size, temporal window, measuring units);
E11 – establishing of the variable parameters of the of the drill bush guide plates (console length, bush size, etc.);
E12 – working out of the experiment strategy (method of the complete factorial experiment, Taguchi methods, etc.);
E13 – accomplishing of the experiments;
E14 – interpretation of the results.
Leontiev, Reduction of flexible workpiece vibrations with dynamic support realized as tuned mass damper. 14th CIRP Conference on Modeling of Machining Operations(CIRP CMMO), Procedia CIRP. 8 (2013) 230 – 234
Leontiev, Reduction of flexible workpiece vibrations with dynamic support realized as tuned mass damper. 14th CIRP Conference on Modeling of Machining Operations(CIRP CMMO), Procedia CIRP. 8 (2013) 230 – 234
Online since: October 2014
Authors: Radu Velicu, Codruta Jaliu, Radu Papuc, Mihai Tiberiu Lates
It identifies the length of contact and number of links in contact, depending on usual input data for the preliminary design.
It starts with input data from geometry but also load of chain drive.
Normal load and pressure distribution on chain-guide contact gives data for further theoretical evaluation of friction losses.
The final purpose of the research is shape optimization with the goal of friction reduction and durability improvement.
It starts with input data from geometry but also load of chain drive.
Normal load and pressure distribution on chain-guide contact gives data for further theoretical evaluation of friction losses.
The final purpose of the research is shape optimization with the goal of friction reduction and durability improvement.
Online since: July 2011
Authors: Jia Wu Li, Liang Gao, Hua Bai, Rui Min
Pressure measurement system is Composed of PSI electronic scanning valves, the signal acquisition and data processing software.
1.2 Test model and Test species
The roof of the model is curved surface and made from high-pressure bubble board.
Analysis of test results 2.1 processing test data According to test data, the mean Wind pressure coefficient[7-8] at all wind angles is calculated.
Turbulence Effects on Maximum Surface Pressures-A Mechanism and Feasibility of Reduction//Proc. 5th Int.
Analysis of test results 2.1 processing test data According to test data, the mean Wind pressure coefficient[7-8] at all wind angles is calculated.
Turbulence Effects on Maximum Surface Pressures-A Mechanism and Feasibility of Reduction//Proc. 5th Int.