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Online since: April 2011
Authors: Ren Jie Wang, Gang Liu, Shou Zhi Pu, Hong Ying Xia
The kinetic and electrochemical experiments indicated that the cyclization/cycloreversion process of the compound was determined to be the zeroth/first order reaction, and the electrochemcial switching property can be potential use for electrochemistry data storage.
The two isomers of diarylethenes differ from each other not only in their absorption spectra, but in many physical and chemical properties including geometry, refractive index, as well as oxidation/reduction potential, etc [8-9].
From these data, it can be concluded that there is only one oxidation process for the open-ring isomers, but there are two oxidation processes for the closed-ring isomers.
The electrochemical property was studied by cyclic voltammetry experiment and the consequence suggested that the diarylethene derivative can be used as an electrochemical switch and electrochemistry data storage.
Moreover, the optical storage experiment showed that the diarylethene derivative can be use as a data storage medium.
Online since: August 2016
Authors: Zheng Gang Lu, Xiu Xin Wang
The reduction in calcium ions is usually attributed to the presence and the condition of fly ash.
Considering the above factors, the formula in literature[8] is adopted to calculate the apparent activation energy of cement: (3) Where T0 is the datum temperature(=-10℃), w/b the water-binder ratio, β the ratio of ultimate degree of hydration at temperature T to ultimate degree of hydration at reference temperature Tr, which can be approximated by β=1.1-0.004T.
By using the data optimization schedule in Matlab software, a two-parameter fitting was carried out upon the experimental data, and the best-fitting results are listed in Table 3.
Fig.3 The adiabatic temperature rise of concrete based on equivalent age Table 3 θu and M values of the concrete No 1 2 3 4 5 6 7 8 θu /℃ 33.78 32.26 31.55 31.25 29.94 28.49 26.39 25.45 M/d 2.02 2.77 2.79 2.06 2.91 3.12 3.31 3.37 As shown in Table 3, M gradually reduces with the decrease of w/b ratios, which illustrates that the adiabatic temperature rise based on equivalent age will be accelerated with the reduction of w/b ratio.
The analysis of the experiment data shows that concrete with lower water-binder ratio has smaller heat release coefficient, while the addition of fly ash can lead to a significant decrease in the rate of heat release.
Online since: November 2012
Authors: Bai Xiao Tang, Yong Wei Wang
Taking into account the apparent density and strength of wall insulation materials, requirements, test data to determine the optimal dosage of the foaming agent should be 0.4 ~ 0.6kg, to determine the content of foaming agent in the lightweight aggregate concrete of the most good range. 1 Introduction At present, the domestic some economically underdeveloped areas still use solid clay brick, solid clay brick production is not only consume large amounts of land and coal resources, and the production process to produce a large number of toxic sulfur dioxide gas, polluting the environment.
According to the selected raw materials, the design basis of lightweight aggregate concrete with ratio shown in Table 1 Table 1 The mix ratio of lightweight aggregate concrete Cement content kg/m3 The dosage Of fly ash kg/m3 Total water kg/m3 Ceramic sand content kg/m3 EPS amount of particles kg/m3 Dry apparent density kg/m3 Compressive strength of 28dMPa 331 65 187 410.4 2.43 893 4.52 Note: kg / m3--1m3concrete composition dosage ( kg ). 3 Test method and data The benchmark of lightweight aggregate concrete dry apparent density is 895kg/m3, in practical engineering applications, the dry apparent density is too large, resulting in large thermal conductivity, which is not conducive to energy-saving insulation wall materials in order to achieve more good energy requirements, mixed with the foaming agent is an effective way.
According to the experimental data in Table 2, using the original software can be drawn per cubic meter of foam agent content and its dry apparent density relationship curve, as shown in Figure 1.
Taking into account the requirements of strength, according to test data analysis, the optimal dosage to determine the foaming agent should be 0.4 ~ 0.6kg.
But mixed with a foaming agent, there should be some small holes in the hardening cement paste. the stress concentration phenomenon will be produced, which leads to the decrease of cement strength. the ultimate expression for the reduction of the compressive strength of concrete.With the increase of foaming agent, the density of concrete is also an increase, With the increase of foaming agent, the density of concrete is also an increase, its performance for the compressive strength of concrete increase, but the magnitude is very limited.
Online since: February 2012
Authors: Xiao Fei Wen, Jin Shu Lu, Zhen Dong Cui, Qiang Yuan
The torsional vibration test data of four sets of propulsion shafting of two ships were collected and analyzed.
The test steps are as following: speed sensors are respectively arranged on the flywheels of the main engines on both sides, and then get the signal access to the shafting torsional vibration measuring instrument(ANZT6), and the data of torsional vibration are recorded by the computer automatically.
The main engine on the right side is tested first, and then on the left; in the speed range of the main engine, from 500rpm to 1000rpm, interval of two measurements is about 15rpm, the test data are recorded by computer.
(a) 1R (a) 2L (a) 2R (d) 2L Test data analysis.
According to the rules of CCS, when the relative error between shafting calculation frequency and the actual frequency is less than 5%, the torsional vibration data got from measured point can be used to calculate the torsional stress or torsional moment of the shaft section and device of the whole shafting based on shafting torsional vibration calculations, as shown in table 1.
Online since: January 2019
Authors: Bo Chi, Si Shen, Dong Yan, Jian Pu, Li Jian
The data was obtained and the curve fitting is carried out, and the corresponding relationship between the polarization conditions and mechanical properties is obtained and the phenomenon is explained.
The enrichment of oxygen vacancies can cause lattice defects which cause a reduction in the breanking strength.
The experimental results show that Mn element diffuses from the LSM cathode into the YSZ electrolyte along the grain boundary by the data of SEM and EPMA.
Studies of Morphology of Half-cell of Anode Supported SOFC after Reduction[J].
Studies on Stress Changes of Half-cell for Anode Supported SOFC in Reduction[J].
Online since: December 2009
Authors: Ben Aour, Fahmi Zaïri, Moussa Naït-Abdelaziz, J.M. Gloaguen, J.M. Lefebvre
An optimal agreement between FE results and experimental data was obtained for a friction coefficient of 0.2.
The material constants of the elastic-viscoplastic constitutive model were determined from a least-squares regression fitting of the compression tests data.
As shown in Fig. 2, a quite good agreement over two decades is observed between experimental data in compression and the constitutive model.
It can be remarked that the significant reduction of warping is obtained by using the routes BC and C; however the maximum warping is obtained with the route A.
However, in the case of PP a slight reduction of warping was observed as the extrusion temperature is increased [18].
Online since: June 2013
Authors: Gerhard Hirt, Dirk Rosenstock, Dominik Recker, Bodo Gehrmann, Rolf Lamm, Klaus J. Steingießer, Ralf Rech
As shown above, the measuring data can be used to set up FEM simulations.
The measuring data is sent by TCP/IP to the online monitor, which instantly processes the data.
The input data of the temperature model is the measured surface temperature.
The measuring data from a single forging stroke are sent by TCP/IP directly to FAST.
Additionally to the data presented on the screen, further data like minimum and maximum austenitic grain size and statically and dynamically recrystallized fraction are calculated and can be shown.
Online since: March 2015
Authors: Wei Sun, Jun Sheng, Ting Shang, Yuan Kang, Jian Chao Shi
Through analyzed data of cast thin sections and scanning electron microscopy (SEM) data, analyzed the impact of main diagenesis on reservoir properties in Niuquanhu area.
Siliceous cementations have great effect on the physical property of reservoir, Quartz secondary enlargements make the degree of pore filling improving, reduction of porosity, throat narrowed, the percolation ability becomes poor, the reservoir becomes more tight (Fig.5).
The loss porosity evaluation map of compaction and cementation showed that almost all the data fall into the loss porosity of compaction area.
Online since: July 2014
Authors: Xing Li Wu, Shi Gang Cui, Li Guo Tian, Li Zhao, Fan Liang, Li Li Yang
In the paper, we process the input and output data by using the nonlinear optimization method to obtain the system model.
We can get the form of an experimental model of the transfer function by analysize the model and obtain a linear model of the system by processing the input and output data on the system identification process.
Then we make the discrete Fourier transform on the input and output data, and determine the parameters of experimental transfer function on the nonlinear optimization method by the formula(6)
(6) Wp is the weight matrix, DFTp is the ratio of discrete Fourier transform between input and output data, x1 to x6 are the parameters of transfer function.  
Chiang, A Schur method for balanced-truncation model reduction[J], IEEE Transactions on Automatic Control, 1989vol. 34(7) 729–733.
Online since: September 2005
Authors: A. Lucifredi, M.E. Poldi, P. Silvestri, E. Foglino
Each of these modules interfaces with the user through dialog windows where the data necessary for computation are inserted by the keyboard, through pushbuttons selecting the various functions and providing the management of input-output files.
Life consumption 0.00364 [%] Fatigue life consumption 0.00289 [%] Creep life consumption 0.00075 [%] On the basis of the considerations expressed, there is an evidence of the interest, mainly of the plants manufacturers, to elaborate and to test algorithms to provide enough reliable data for the mechanical components.
The future sceneries are manifold; in the near future at least two of them may be foreseen: the former is the development of a methodical procedure for full testing of the Life Time Evaluator to discover any potential bug in the code and to create a data bank to cover all the main operation conditions (startups from cold, tepid, warm conditions, disconnections, partial load operations, ...).
The latter is the validation of the results through data taken in the field: this would make possible to correlate the evaluation of life consumption to the degree of damage to the turbine, enabling the prediction of the criticalities and of the defects that are expected to take place in the near future.
Processing the data provided by DOE according to the "response surface" method gives an indication about the areas of the "design space" where the probability of finding the best configurations is higher.
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