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To investigate the mechanism of the reduction of springback in the above three-step U-bending process, FE simulation of the bending with PAM-STAMP 2G was also conducted where the advanced kinematic hardening Yoshida-Uemori model was employed.
To investigate the mechanism of the reduction of springback in the above this process, FE simulation of the bending with PAM-STAMP 2G was also conducted where the advanced kinematic hardening Yoshida-Uemori model [7-9] was employed.
Material models To investigate the mechanism of springback reduction in this process, numerical simulation was conducted with PAM STAMP V.2011, where a 1/4 model was used.
Figure 4 shows the comparison of the calculated results of springback angles of 780G sheet with the corresponding experimental data for the present three-step U-bending process for various combinations of the clamping forces F1 and the bottom pushing-up forces F2.
Springback angle [Degree] Experiment Y-U model IH model F2 = 0 F2 = 3kN F2 = 5kN F2 = 10kN F2 = 20kN Fig. 4 Comparison of the springback angles calculated by Y-U model and the IH model for 780G sheet with the corresponding experimental data in the three-step U-bending process for various bottom pushing-up forces F2 under a constant clamping force F1 = 1.5kN.

The GPCW showed a 43% reduction in strength between the 7th and 28th days, with a further decrease of 11% from 28 to 365 days.
This reduction can be attributed to the absorption of these ions by the cured concrete samples.
The presence of these oxides in the efflorescence must have contributed to the reduction in strength experienced by the GPCD at 180 days and after.
Scientific Data, 9(1), (2022)1–14
“Reduction in CO2 emissions during production of cement, with partial replacement of traditional raw materials by civil construction waste (CCW).”

In the eyes of Bohringer C and Helm (2008), developing countries should be fully supported in capital and technology for their emission reduction.
The data of China’s coal, oil and natural gas consumption quantity come from the database of China National Knowledge Infrastructure (CNKI) with the unit of ten thousand tons standard coal.
Stationary Test for the Data Data used in this paper include the four time series of the consumption quantity of China’s coal, oil and natural gas, and the environmental quality of China during 1995-2012.
In the time series model, spurious regression can exist between two sets of data that have no relationship with each other.
Therefore, it is necessary to conduct stationary test on the data.

Both the convex and concave curvatures hamper the attachment of cross-injection coolant to the surface, resulting in a reduction in film cooling effectiveness.
The heating power of the guard heater was so adjusted that the surface thermocouples attached to the opposite sides of the wall at the same location had close readings before taking data.
Adiabatic film cooling effectiveness data was taken under steady state condition and calculated using Eq. (1).
Fig. 11 Effect of M on pitch averaged effectiveness of concave surface at Re=1.24x105 In all, both the convex and concave curvatures result in a reduction in film cooling effectiveness.
Both the convex and concave curvatures hamper the attachment of cross-injection coolant to the surface, resulting in a reduction in film cooling effectiveness.

From these data, information representative of an alloy matrix unattached by corrosion, can be extracted.
This indicates that, for the etched alloy, no activation of the cathodic sites for oxygen reduction is necessary, since the etching treatment has already provided available sites.
Therefore, a reduction of cathodic activity on one specimen results in a decrease in potential, since the anodic activity is not affected by the de-aeration.
Subsequently, a temporary current increase is observed, due to the anodic activation promoted by the pH reduction following chromic acid addition.
This layer provides a relatively efficient cathode for the reaction of oxygen reduction, but is not particularly effective for hydrogen evolution.

The IMO’s discussions focus on the technical, operational and market-based measures for ship’s CO2 emission reduction.
Operational measures: These measures include reduction of ship speed, optimization of ship routes by meteorological navigation and good maintenance of ship structure and critical equipment so as to improve operational efficiency and achieve CO2 emissions reduction.
Ship Resistance Reduction Technologies The UK successfully developed new paint for ships.
The wireless communication network system can transmit the detected data to the onshore office when the ship is sailing in China.
Facing more and more stringent standards for ship CO2 emission reduction, China must make a breakthrough and achieve actual effect in the low-carbon ship technology, in order to achieve China’s commitment to emission reduction targets and win Chin’s voice on ship CO2 emission reduction standards.

Fig.2 Different flow velocity experiment result data in porous medium Keeping velocity at 0.5ml/min, permeability of porous medium was measured with formation water, and then injects fresh water and we got the permeability after water-damage (after 24 hours).
Table 1 Water-damaged result data of porous medium number Model 1 Model 2 Model 3 Permeability by formation water(Kf),mD 3241 23.1 174.4 Permeability by fresh water(KW), mD 251 8.5 27.4 KW/Kf 0.08 0.37 0.16 Steam temperature, ℃ 180 170 210 Steam pressure, MPa 0.16 0.24 1.28 degree of superheat, ℃ 67 44 19 Permeability After overheated steam, mD 1222 18.3 47.6 ratio 4.87 2.15 1.74 Data of Table 1 illustrate the sharp reductions in permeability which can occur in the presence of fresh water.
Once these ions are removed, the facing negative platelets repel each other, the montmorillonite swell, causing permeability reduction of porous medium (Atwood, 1964; Zhao, 1999).
Table 1 shows the basic data of overheated steam in experiments.

Measurement and analysis of research object as a "black box" systems, through a system of measurement and statistical analysis of input and output data, in accordance with certain guidelines identifying best data fitting model.
Model analysis: solving a mathematical analysis of the results, such as error analysis and modeling of the data on the results of sensitivity analysis, etc.
Model checking: the translation back to the actual problem solution and analysis of results, and actual phenomenon, data comparison, verification of rationality and fitness model.
Fig . 3 Force analysis of rudder Mathematical model of ship propulsion Ship propulsion is done through the host, after reduction gearboxes and intermediate shaft links the output power to the propeller, propeller thrust against water, due to the reaction in order to advance the movement of ships.
Simulation of intermediary multiplied by the reduction ratio and advance after the loss ratio, accordingly the propeller rpm.

Estimating a reduction in the diffusion length of positrons/Ps with decreasing temperature, we find reasonable agreement for -10.4% porosity, while our calculations disagree with results for 17.3% porosity.
The 3�/2� ratio was measured at selected implantation depths as the sample was cooling down; from these data we reconstructed the 3�/2� ratio vs. mean implantation depth z (see Figure 1) for all temperatures.
We model the data by considering that positrons implanted within a diffusion length from the pores, or Ps created within its diffusion length from a pore, may contribute to the Ps trapped inside the pore.
Employing equation 1, we find reasonable agreement with the data; this is however not the case for the 17.3% porosity sample.
The broken lines indicate the dependence of the lifetime matching the data at room temperature including the reduction in Ps reaching pores as modeled in equation 1 (see text).

Optical fiber access networks can provide sufficient bandwidth to meet the changing requirements telecom services to multimedia broadband services for voice, data, image combining, and is really suitable for the development of an access technology [5].
In different data rates, it keeps the attenuation constant, the error rate can be forecast, it can be used in an electrically noisy environment
Network cost reduction, performance improvement, the introduction of digital communication technologies, the reduction of electromagnetic interference and plastic optical fiber standard formulation and improvement make plastic optical fiber to have been widely used in industry, agriculture, national defense construction, and gradually promote plastic optical fiber industry become the mainstream of the optical communication industry.
The biggest advantage of the optical fiber communication is that a great deal of transmission capacity, low transmission loss and dispersion properties of optical fiber access network can provide enough bandwidth to meet the ordinary telecommunication services to voice, data, image combining multimedia broadband services changing needs, and it is really suitable for the development of an access technology.
Fig.3 POF Optical Switch For TV, coaxial cable has to meet the needs of users, but from the trend of the development of future large-screen high-definition TV, and TV shopping will require a great deal of bandwidth and the amount of data, connect to a TV with a plastic optical fiber that is the development trend.