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Online since: February 2011
Authors: Nu Wen Xu, Chu Nan Tang, Chun Sha, Ru Lin Zhang
The numerical calculation methods can be divided into two groups [1]: the first is the numerical simulation combined with the optimum search method; and the second is the strength reduction method.
By means of functional data analysis and the strength reduction technique, Zheng et al. [2] developed a technique for searching the critical slip surface.
In this research, a numerical code RFPA2D based on Strength Reduction Method was employed to evaluate the stability of the left bank of Jinping first stage hydropower station.
The principle of strength reduction FEM and corresponding program The method of strength reduction FEM.
A Mohr-Coulomb criterion is applied in these models and the factor of strength reduction is 0.01 for each step.
Online since: August 2014
Authors: Li Qiang Ma, Ji Hui Li, Wen Jing Li, Yan Zhao Li, Jian Wei Yue
The ash reduction comparison of the step-by-step release flotation test with high intensity conditioning (HIC) or not, and the comparison of flotation test with HIC and adding depressant were made.
The results show that after cleaning stages the ash contents of flotation clean coal have some reduction while the clean coal yields decrease greatly.
The results show that step-by-step flotation with HIC method not only realizes the ash reduction but also keep better yields.
Comparing them with traditional process above, the yield grow 22.10 and 20.13 percentage points respectively, and the ash contents has a little reduction at the same time.
These data show that flotation with HIC will increase the yield of clean coal obviously.
Online since: September 2014
Authors: Tatyana Volgina, Oksana Yu. Fedorova, Viktor T. Novikov
Simultaneously, at the cathode, reduction of the zinc ions, contained in a number of medicinal products, is possible.
Table 1 provides the data to determine COD, showing that complete oxidation time of the SA and its degradation products in the solution directly depends on the current density (Di).
The experimental data provided in Table 1 evidences that the system irregularity slows down the process, and the current density does not impact much to the rate of the reaction both when oxidizing SA and SSA.
Table 2 provides test data obtained at oxidation of Pasta Zinci-salicylata (preparation formula: salicylic acid – 1%, zinc oxide – 12.5%, amylum – 12.5%, yellow vaseline – up to 50%) and Salicyl alcohol (2% salicylic acid solution in ethanol), showing that the organic compounds of medicinal products undergo deep oxidation regardless of their chemical composition.
According to the infrared spectroscopy data, after neutralization of spent electrolyte where containing of organic carbon is equal 30 mg/dm3, solid wastes of lead sulphate contain the trace amount of the organic substances, which have hydroxyl-, and carboxyl- and keto-groups, on its surface.
Online since: January 2012
Authors: Xin Yun Zhi, Li Ping Huang, Hai Long Pang, Chun Run Zhang, Hao Li, Cheng Lin Deng
Legislation in locations worldwide are calling for further reductions in nitrogen oxide (NOx) and particulate matter (PM).
An SCR (Selective Catalytic Reduction) exhaust gas after-treatment system, which uses a urea solution as a reductant, has a high NOx reduction potential.
The effect of NOx emissions reduction was obvious, and the reduction efficiency of NOx was 78.9%.
The authors would like to thank SINOTRUK for their crucial help in ESC and ETC test that they achieved and for the valuable discussions, for preparation of the SCR system and Wei ZHANG in extracting data obtained by the engine testing.
[2] Walker et al, “Development of an Ammonia/SCR NOx Reduction System for a Heavy Duty Natural Gas Engine”, SAE paper 921673
Online since: February 2013
Authors: Zheng Xie, Bai Qing Sun, Wei Quan Jin, Xin Xin Wang
After calculating, finding that the same regulation of emissions reduction for all regions is better for economic growth and different regulation of emissions reduction is better for balanced development of regional economy.
and maintain that the direction of causality is unclear; Perman and Stern (2003) analyze the EKC relationship in a panel of 74 countries using sulfur emissions and point out that the data have stochastic trends.
Empirical analyses 3.1 Data According to emissions goal, we can stipulate that carbon emissions of per unit GDP 2010 drop by 4% compared to 2005.
Calculate the ratio of GDP and carbon emissions from 2005 to 2009 for all regions and the average of them to improve the practicality of data, it is approximately equal to , then we get ,,,.
Income and emission: a panel-data based cointegration analysis.
Online since: November 2013
Authors: Yuan Qian, Quan Shi
Data Acquisition and Preprocessing Data Acquisition.
Data Preprocessing.
Data preprocessing is an important link in the process of data mining.
Data preprocessing is a preliminary cleaning operation, to make the data into the clean data we want.
Data preprocessing is mainly to complete the following tasks: Data Cleaning, Data Reduction, Data Integration and Transformation.
Online since: January 2012
Authors: Ya Ming Zhang, Hao Shan Shi, Yan Liu, Chao Liu
The scheme of the multipath error reduction based on the EMD-Wavelet is suggested.
At last, the scheme of the multipath error reduction are tested and verified by some experiments.
Multipath Error Reduction Model Empirical Mode Decomposition.
We focus on soft-threshold noise reduction model proposed later.
And the data was divided into four different segments (Table 1).
Online since: June 2013
Authors: Matthias Weiss, Akbar Abvabi, Bernard Rolfe, Peter Hodgson
Bending and reverse bending are the dominant material deformations in roll forming, and hence property data derived from bend tests could be more relevant than tensile test data for numerical simulation of a roll forming process.
The skin passed strips are used in a pure bending simulation to record moment-curvature data and this data is then applied in an inverse analysis to predict the residual stress profile in the material.
The moment-curvature diagram can be obtained based on the load-extension data [21].
The same optimization parameters were used in both cases of 0.5% and 1.4% thickness reduction and just the target curves (moment-curvature data in Figure 5) are different.
The discrepancies observed for the 1.4% thickness reduction suggests that there may be multiple residual stress profiles that fit the reference moment-curvature data.
Online since: June 2013
Authors: Fritz Klocke, Sergej Rjasanow, Marvin Fleck, Richards Grzhibovskis, Fabian Schongen, Patrick Mattfeld
Experiments of the examined lateral extrusion process provide data for the verification of the investigated process simulation models.
Still a stress calculation inside the BEM domain is possible based on the boundary data.
CAD data of tool and workpiece design of the lateral extrusion process was used to create the geometry for the investigated process simulation models.
To achieve the model requirements, the imported geometry data was further processed.
The comparison with experimental data proved the validity of the FEM/BEM model and the calculated results.
Online since: August 2013
Authors: Li Ping Qiao, Li Juan Zheng, Jing Zhong Liu
Send device processing the data collection equipment, assembly up and through the channel data sent out.
comEvCTS 3 Change of "Clear To Send" line. comEvDSR 4 "Data Set Ready" line of change.
With continuous data sent to and send way of connected PC, packets for fixed length.
Through the research of CDT data acquisition method design grid data acquisition software, against the traditional manual operation way, simple operation, easy to management, to power measurement data for statistical analysis, to realize the resource sharing, data sharing, meet the needs of enterprise cost accounting, to ensure the data security ,completeness, correctness, reflects the advance of the computer and network.
Ning, “Algorithm Analysis CDT Protocol Reduction Numerical,” Journal of Liaoning Institute of Technology, vol. 24, no. 4, pp. 29-31, 2004
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