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Online since: July 2015
Authors: Wojciech Jurczak
The processes of heating and melting of the edges of bonded sheets as well as the step of solidification occurring after completion of the welding causes mechanical deterioration of the mechanical properties of the weld such as reduction in tensile strength, fatigue strength and ductility.
Measurement set-up: a, b) MTS with the measurement system – electrochemical cell (corrosive solution and reference electrode Ag/AgCl placed on a sample) with Data Logger for electrochemical potential measurement, c) macrostructures of TIG and FSW welded joints (particular areas of the joint specified) before the static tensile test In this way the level of tensile stress that initiates corrosion processes on TIG and FSW joints of 7xxx series alloys (Al-Zn-Mg) were determined.
Measurement of hardness of the friction stir welded joints showed typical course for 7xxx alloys – an increase in hardness in the central regions of the weld (the nucleus) and a reduction in hardness in the HAZ.
Cracking of the protective oxide layer depends on the tensile stress level as well as on the joint area and is closely linked to radical reduction of electrochemical potential. 3.
Online since: August 2015
Authors: Koel Chaudhury, Basudam Adhikari, Akhtar Jahan Siddiqa
To evaluate the release kinetics, data was fitted to different models.
The characteristic data are summarized in Table 1, which demonstrates the formation of PLGA and letrozole-PLGA nanoparticles with mean diameters less than 800 nm.
The increase in zeta potential value (-21.0±0.6 mV) of letrazole-PLGA nanoparticles compared to that of blank PLGA nanoparticles is due to the reduction in the mobility of PLGA nanoparticles with letrazole encapsulation.
In order to determine the mechanism of drug release from the nanoparticles the dissolution data was fitted to various mathematical models (Eqs.(1), (2) and (3)) described as follows: Zero order model: Mt = M0+ K0t (1) Higuchi model: Mt = M0 +KH t1/2 (2) Korsmeyer-Peppas model Mt = M0 + KKtn (3) where Mt is the amount of drug dissolved in time t, M0 is the initial amount of the drug, K0 is the zero order release constant, KH is the Higuchi rate constant, KK is a release constant and n is the release exponent that characterizes the mechanism of drug release.
Online since: January 2012
Authors: Yi Zhang, Ying Bo Zhu
Thus, we can divide the inspection areas of concentration into linear zone (single scattering) & exponential region (multiple scattering) through the experiments data.Whereas, the precision of inspection can be up to 0.1‰ among the limit of lower concentration.
Scattering between position rs and ra In the lamella, the total scattering intensity with regard to all the parts of scattering which is at ra is like this: (1) As for  ra  , in the external lamella, all the scattering parts of internal slices can satisfy the equation (1),but: (2) But equation (2) is put into equation (1); it can be gained the total light intensity which is besides the lamella.: (3) If in the equation (3) zs is carried out the integral, we can gain: (4) Due to the mica-particle size is more than wavelength concerning the inspected mica-pulp; each particle can meet the diffraction & scattering theorem of Fraunhofer, its scatteredlight is major appeared in the fore-angleθ, andθ≈0.So we can think that equation (4): (5) (6) As for the graph of equation (6), you can check out Figure6 [8] : Fig 6 Logarithm curve of scattering intensity According to the above reductions
It is essential to do experiments concerning the precision of optics inspections for mica-pulp at the low concentrations, because the concentration of mica-pulp is about 3‰.As for India white mica, Urumqi white mica and Urumqi bronze mica, their concentrations are from0-6‰.You can check out Figure10-12: Concentration/% Voltage/v Fig 10 Concentration curve of muscovite pulp Concentration/% Voltage/v Fig 11 Concentration curve of muscovite pulp Voltage/v Concentration/% Fig 12 Concentration curve of phlogopite pulp From the experiments data, we can know that the precision of laser inspection can be up to 0.1‰, and linearity is good, it also meet the needs concerning mica-pulp at the low concentration.
As for the experiments data and the anomalisms of multiple scattering, this dissertation will not discuss clearly.
Online since: November 2005
Authors: Hang Gao, Li Gang Qu, Jian Hui Li
Based on a 3D solid model created with the CAD-system-compatible software SolidWorks, Finite Element Analysis (FEA) of the Furnace frame structure was carried out, which provided easily utilized data for the successive manufacturing processes as well as near-instantaneous feedbacks to designing process.
The model of double-vertical-column is created with SolidWorks, which has powerful 3D modeling functionalities and the data exchange utility to enable seamless integration of CAE system, the other consideration of this selection is the substantial modeling efficiency, especially in process of 3D modeling [6, 8].
The rib is 20mm thick, Q235A steel, and the new structure achieves the maximum stress reduction by 27%, the maximum displacement by 47%, but no significant change of patterns of stress distribution are observed in the new design based on the FEA calculation.
The obtained lower 4-order modal shapes are shown in Fig. 5 Table 2 The lower 4-order frequencies and shapes Mode Order Frequency/Hz Modal shape 1 2 3 4 2.99 3.89 12.02 23.2 X, bending Y, bending Bending Bending Conclusions 1) The designing process of key structure of Electrical Slag Founding Furnace (ESFF) was presented, where both the static, stress distribution and stiffness, and dynamic properties, such as eigen- frequency, modal shapes, were calculated with COSMOS/Works based on the a 3D model created with SolidWorks. 2) FEM analysis was carried with the 3D model created directly with SolidWorks, the calculated results provide near-instantaneous data for quick evaluation of static and dynamic properties of the new design, which is one of the key processes in agile manufacturing, concurrent engineering and CSCW paradigms.
Online since: June 2015
Authors: A.B. Efremenkov, Denis V. Valuev, R.A. Gizatulin, A.V. Valueva, S.N. Fedoseev
Industry data were obtained to confirm the possibility of providing a sufficiently high and stable recovery of calcium in the context of production at a particular plant and its effective impact on the composition, physical and chemical condition of a melt and properties of a final product.
The oxidation reduction potential of slag is very important for the deep desulphurization process.
The residual calcium concentration was 0.0002 – 0.0006% in the comparative melts without calcium silicon adding, this could apparently be due to reduction of calcium oxide from slag by aluminum during de-oxidizing at tapping from the electric arc furnace and formation of СаО·Аl2О3 – type aluminates [4, 9].
Online since: April 2016
Authors: Ștefan Cotescu
This paper presents relevant data for a robust design of thermoplastic products, as a support for optimization of product design.
Stress concentration in relation with corner radius and thickness reduction Fig. 4.
The problems caused by material contraction are equally severe because of the volume reduction phenomena.
Online since: May 2009
Authors: James A. Brierley, M.C. Kuhn
The role of the microbes is to maintain a high oxidation-reduction-potential (ORP) with ferric iron by oxidizing the ferrous iron.
The bacterial population density was determined using the MPN procedure and the oxidation-reduction potential data are reported using the Ag/AgCl electrode.
Figure 1(A) shows fluoride can also complex with ferric iron as indicated by decreasing oxidation-reduction potential with increasing fluoride ratio to ferric iron.
Online since: July 2012
Authors: Hong Li, Xin Li
For the request of energy conservation and emission reduction and low carbon environmental protection, car lightweight will be the future direction of the development of the car industry. 1.2 The traditional car is still the mainstay of Chinese auto industry, there is a great potential that Chinese automotive industry implement lightweight technology According to the disclosed of relevant documents, Chinese new energy auto production and sales amount in 2020 accumulative totaled 5 million.
According to the data released by the Audi, for new energy vehicles, reduce weight for every 100 kg can increase the life mileage 7.5%, that is, the more light the more energy saving, and also helps to enhance sailing, but the main problems of the industrialization of the electric car is the ability one time charge to run after a short, and the battery is of certain itself weight and size.
Titanium adoption, body weight reduction, and the results improve fuel efficiency.
In the future, titanium market prospects in the automotive sector depends mainly on two factors: First, titanium significant reduction in manufacturing costs; second, corrosion resistance under harsh conditions caused by the heat resistance.
Online since: August 2005
Authors: D.M. Babic, Andrew Torrance, D.B. Murray
The dynamometer was connected to a PC data acquisition system via two charge amplifiers.
This shows clearly that the temperature reduction is entirely due to the better lubrication and cleaning of the wheel, which the addition of soap provides.
Mist jet cooling with a water/soap mist cools and lubricate the cutting zone to such an extent that significant reductions in tangential forces and grinding temperatures have been achieved
• The tangential force reduction is greater at lower depths of cut
Online since: October 2011
Authors: Yong Mei Qian, Ruo Zhu Wang
Table 3: The third group of model specification statistical chart Model number Width (or Depth)[m] Length [m] Number oflayer Area [m2] Model numbe Width (or Depth)[m] Length [m] Number of layer Area [m2] 8 10.9 24.50 6 1999 16 13.6 58.9 5 4005 9 11.8 37.00 6 3019 17 13.6 73.6 5 5005 10 12.7 49.00 6 3998 18 13.6 88.3 5 6004 11 13.6 61.90 6 5051 19 13.6 36.80 4 2002 12 13.6 73.60 6 6006 20 13.6 55.15 4 3000 13 13.6 86.30 6 7042 21 13.6 73.6 4 4004 14 13.6 29.5 5 2006 22 13.6 92.05 4 5008 15 13.6 44.1 5 2999 23 13.6 110.4 4 6006 From the calculation report of the thermal performance calculation diagram gets relevant data, grouping forms the graph of heat consumption of the unit area changes.
But the heat consumption index of the unit area of building reduces gradually,when the width is more than 13.6 m, the reduction of energy consumption reduces greatly.Although the width increases again , the heat consumption index of the unit area of building could not reduce obviously.
But the heat consumption index of the unit area of building reduces gradually,when the width is more than 13.6 m, the reduction of energy consumption greatly reduces.Although the width increases again , the heat consumption index of the unit area could not reduce obviously.
After the width is more than 13.6 m, the reduction of energy consumption greatly reduces.
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