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Online since: November 2017
Authors: Sara Faiz Hanna Tasfy, Maizatul Shima Shaharun, Noor Asmawati Mohd Zabidi, Ahmed Elbagir, Duvvria Subbarao
Finally, the value for the catalyst surface area was calculated according to the BET equation using the adsorption data collected at relative pressure (P/P0) between 0 to 1, while the value for the pore size distribution was determined from the desorption branch of the adsorption isotherm by the Barrett-Joyner-Halenda (BJH) method.
The reduction behavior of the calcined catalyst was determined via temperature programmed reduction under the flow of dilute 5%H2 in Ar.
CZS-20 shows two reduction peaks at low temperature (150oC) and high temperature (310oC) representing the reduction of bulk Cu (Cu2+ → Cu1+) and small particle size (Cu1+ → Cu0), respectively.
In addition, the presence of the second reduction peak at the higher reduction temperature for CZS-20 catalyst could be attributed to the reduction of CuO specimen inside the pores of SBA-15.
The data presented show that the activity, methanol selectivity as well as the space time yield increased with increasing the metal loading until it reaches maximum values at 15 wt% while further addition of metal inhibits the catalytic performance.
Online since: July 2013
Authors: Tian Tian Yu, Min Wang, Li Cai Zhang
At this time speed detector detects signal and real-time collects data into microcomputer, in order to get variation waveform about oscillation frequency.
When vehicles go through the loop and the frequency turns into peak, the center of loop will coincide with the center of the vehicle, now the collected data is the exact value of speed and position.
Speed evaluation based on cloud model is processing the data of time interval when vehicles go through sensors, to gain speed with the combination of positive cloud and reverse cloud algorithm.
(3)According to the related concepts of cloud model, it is known that the average of the experimental data is the actual expect, the maximum of certainty, recorded as max (real(u)).
Simulation results show that cloud model has strong adaptability and real-time for scattered data when measuring the driving position of vehicle, and can overcome the faults of other algorithm, which require high accuracy for data.
Online since: February 2026
Authors: Richard Leon Jeanneau Cervantes, Ederson Huamanrimachi Huaman, Estefanie Isabel Quiroz Sandoval, Rubén Esaú Mogrovejo Gutiérrez
Dry Density (g/cm³) Cohesion (kg/cm²) Internal Friction Angle Location 18S Sample/ Result Having previously obtained the time of concentration (Tc) based on the geographical data: length of the main channel of 13.0 km and slope of 0.05m/m; which is given by equation 1
Analysis and Validation As regards precipitation, since it is the triggering factor for landslides in the Tinajas stream in the town of Cieneguilla, it was carried out with the maximum 24-hour precipitation obtained from the pluviometric data obtained from the Escomarca station shown in Table 1; the station is located 35 kilometers from the collection area.
The results show a reduction of its hydraulic footprint downstream, after the implementation of the structure in the upper part of the Tinajas Creek.
This shows a 70% reduction of the flooded area, thus validating the proposed solution.
The Tinajas ravine and the Lurin River ravine do not have a pluviometric station; for the purposes of this study, data from the nearest station in the Escomarca district of the Huarochirí province, located 35 km from the rainfall collection zone, were used.
Online since: September 2014
Authors: Dong Xiao Niu, Peng Wang, Xiang Jun Meng, Qiong Wang, Bing Yi Liu, Wei Chang Zhang
First of all, the moving average method is used to preprocess the original data and weaken the burr of the original data.
The main calculation steps of this model are as follows: On the assumption of the original data series (1)Use the three-dots smoothing method to preprocess the raw data (1) Process the endpoint data as follows (2) (3) The moving average of the original data processing, not only weakens the effect of burr data in original sequence, but also enhances the regularity of the original data, and makes the model prediction results more scientific
Therefore, consider the N data of random sequence x as time series of limited energy, the spectrum of observed data can be obtained by Fourier transform.
(1)Construct the residual time series; By the data of the nearby principle, the most recent data can reflect the nature of the electricity consumption better, therefore the residual time series is constructed as formula (11); (11) Where, residuals of the data is
(2)Conducting a one-accumulate of , we get as follows: (3)And the data matrix and
Online since: July 2020
Authors: Anders Hallén, Muhammad Nawaz, Daniel Johannesson, Staffan Norrga, Keijo Jacobs, Hans Peter Nee
In this paper, a technology computer-aided design (TCAD) model of a silicon carbide (SiC) insulated-gate bipolar transistor (IGBT) has been calibrated against previously reported experimental data.
(b) (a) Fig. 2. a) TCAD calibration results of the forward characteristics, IC-VCE, compared to experimental data of a 22 kV SiC IGBT [7]. b) Charge-carrier lifetime-dependent breakdown voltage characteristics of the four theoretical SiC IGBTs with 20-50 kV blocking voltage capability (τA,LOW = 1 μs vs. τA,HIGH = 100 μs).
Summary A 4H-SiC IGBT TCAD model has been calibrated against experimental data and has been used to widely investigate static performance of high voltage SiC IGBTs (20-50 kV).
The calculation indicates that a conduction loss energy reduction of 30 % may be achieved by using 30 kV SiC IGBTs.
Furthermore, the wide range simulation data may serve as input to future converter evaluation studies in various high-power applications.
Online since: June 2021
Authors: Xian Zheng Gong, Yu Liu, Yu Chen Zhang, Li Wei Zhou
Screening of Energy-Saving Technologies for Cement Production Based on Boston Consulting Group Matrix Yuchen Zhang1,2,a , Xianzheng Gong1,2,b* , Yu Liu1,2,c and Liwei Zhou3,d 1Faculty of Materials and Manufacturing, Beijing University of Technology, No.100 Ping Le Yuan, Chaoyang District, Beijing 100124, China 2National Engineering Laboratory for Industrial Big-data Application Technology, No.100 Ping Le Yuan, Chaoyang District, Beijing 100124, China 3China Building Material Federation, No.11 San Li He Road, Haidian District, Beijing 100831, China a894095366@qq.com, bgongxianzheng@bjut.edu.cn, cliuyu@bjut.edu.cn, dzlw@cbminfo.com Keywords: Cement industry; Energy-saving technology; Technology screening; Boston Consulting Group Matrix (BCG Matrix) Abstract.
Method and Data Expert Point-scoring Screening Method.
Data collection.
Some views on carbon emission reduction work in cement industry[J].
Casting industry, energy-saving emission reduction technology screening and evaluation of research [J].
Online since: February 2009
Authors: T.O.K. Audu, E.O. Aluyor
A reduction in the acid value is desired.
There is an overall positive effect when the acid value is justaposed with the levels of reduction achieved in peroxide value.
The reduction in the peroxide and saponification values agrees with these observations.
"Material Safety Data Sheet, Soybean Oil" http://www.ste oil.com/pdfs/msds-soybeanoil.pdf STE Oil Co.
"Material Safety Data Sheet - Soybean Oil"Viewed May 2007 at http://www.cenex.com/%5CLinkedContent%5CPDF%5CLube%5CMSDS%5C IndustrialLubricant%5CDRIP-SOYL.pdf [6] http://www.wikipedia.com Viewed August, 2007
Online since: February 2013
Authors: Ting Lin Huang, Koji Shiono, Ke Jun Yang, Xiao Ying Fu, Xin Sun
Reduction in volume of water due to vegetation is modelled as porosity.
The predictive capability of the model is assessed against experimental data with regard to distributions of depth-averaged velocity and boundary shear stress.
The mean wall velocities from the experimental data () were imposed as the boundary conditions to consider the strong wall effects in this case.
Based on the local friction factors outside the shear layer calculated from experimental data of and , was found to be 0.0003m.
The advection term, (Beta=), was worked out using above equations and experimental data[] and was shown in Fig. 3.
Online since: October 2014
Authors: Anton Pyatakov, Alyona Kostina, Valentina Zvereva
Our investigations allowed us to obtained new data on the pH range of the hypergene and technogene mineral formation depending of the sulfur amount in the wastes coming with the flotation reagents and sulfides under conditions of the atmosphere influence and without it.
Pourbaix’s data and only insignificantly changed or improved the method proposed by him.
This indicates the change of the oxidation conditions by the oxidation-reduction and then by reduction ones promoting the change of the whole process of mineral formation.
Conclusions The investigations we carried out allowed us to obtain new data on the parameters of the modern hypergene and technogene mineral formation that directly depends on the sulfur amount in the system, i.e. the sulfur component in the tailings and the reagent composition that are used in the ore processing, and on the presence or absence of the atmosphere.
Masоn, Oxidation and reduction in geochemistry, Journ.
Online since: September 2011
Authors: Xiao Ming Yuan, Zhao Yan Li, Zhen Zhong Cao
The current CPT-based liquefaction evaluation method, including Chinese code method, the Robertson method and the Olsen method, was verified by those 39 field test data.
The results show that the success verification ratio of Chinese code method, the Robertson method and the Olsen method are relative low by using Bachu earthquake data.
CPT has speed, data continuity, good reproducibility and effortless operation, etc., which is a convenient and reliable in situ test method.
Supplies the penetrating power using the domestic drilling vehicle, while the test is mainly produced by the Dutch a.p.v.d.berg Corporation’s drill pipe, the probe and data acquisition system transmission.
Liquefied level determination and decision results A very important step in survey data analysis is to determine the liquefied and non-liquefied layer position and thickness.
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