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Online since: July 2005
Authors: Jingchun Zang, Junhao He, Xin Wang
) Table 3 Comparison of main production equipment China Koga Ube Haley calcination Nearly half of the enterprises use rotary kilns, others use vertical 70% fine coal +30% heavy oil, the rotary kilns heavy oil rotary kilns rotary kilns batching Computer batching, manual batching Batching platform balance, mixer Automatic batcher Automatic batching, mixer Vacuum pump Slide valve-lode machine set, Steam jet pump The slide valve pumps- the oil jet pump Slide valve-lode machine set Steam jet pump Refinement Manual casting, continuous casting machine Hydraulic pump, continuous casting machine Hydraulic pump, continuous casting machine Hydraulic pump, continuous casting machine Table 4 Comparison of production specifications Series Item China Ube Haley Dolomite (t) 10~12 11.1 9.648 Ferrosilicon (t) 1.1~1.3 1.054 1.09 Heavy oil (t) (Coal) 7~10 2.6 4.31 1 Electric power (kwh) 1000 1200 1950 Reduction
period (h) 9~11 8 8 2 Ratio between raw material and magnesium 6~7 5.78 5.81 Table 5 Gap between environment protection improvements China Koga Ube Haley Waste disposal Black smoke, SO2 and dust particles have started to be harnessed Recycling dust particles; powdered slag sold as fertilizer or hardener for casting mold Recycling dust particles, reduction slag used as fertilizer or raw material for making cement Collecting dust particles with cloth bag After the implementation of "magnesium alloy development, application and industrialization "as one of key projects among science & technology tackling key problems during the national "tenth five-year", Chinese Pidgeon Process has made great progress.
Main technology economical index greatly improved Index comparison before and after science & technology tackle key problem and index comparison among Chinese smelters and overseas smelters Project Before tackling After tackling Best level abroad The activiation of the calcined dolomite with water (%) 25~26% 30%-32% 32~35% The reduction of the calcined dolomited after burnt (%) 0.7~1% ≤ 0.5% 0.1~0.3% Ratio of raw material to magnesium 6.5~7.0 5.9 5.8 Reduction period 12 hours ≤ 9 hours ≤ 8 hours Chinese smelters have applied for a batch of national patents, which form a batch of patent techniques At present government's requirements for environment protection of magnesium production enterprises and the development trend of global economy.
Realize information management of the distribution of materials, financial affairs, office and the technological process.By adopting information technology, we can alter the management, handle large quantities of technical data rapidly and efficiently, analyze and administer economic activities scientifically, find out and solve the problems in business, improve the image of enterprise, promote technological advancement.
With the help of computers that provide large numbers of data promptly, administrative personnel at all levels can keep abreast of the conditions of production and analyze and handle the problems existing in the production facilities.
Online since: November 2016
Authors: Manoj S Pillai, Jency Sara Kurian
Analysis is then done to check the percentage of reduction of response of structure.
Also limitations in using damping ratio as sesmic response reduction measurement were emphasized.
This type of analysis is used to determine the response of structure under the action of El-Centro earthquake data.
Damper properties and the earthquake data were taken from the journal.
It was found that the damper reduction is almost by 82% which is quite economical.
Online since: July 2014
Authors: Xiao Wei Wu, Jun Tian, Ying Sheng Ni
Profit approximately reflects the bidding units’ the amount of price reduction and sharing profit margin, the amount of price reduction higher than the amount of profits, it means the unit bidding prices below the cost to compete.
There are m evaluation indicators, n evaluation objects, and then formed the original data matrix
The above data showed that, A bidder' environmental risk, process risk ,decision objectives risk, scores were 70.55, 77.1and 79.1, composite scores75.25.
Because under normal circumstances a reasonable profit and the risk of the project in direct proportion, so A tender unit profit is general, the profit approximate reflects the amount of price reduction and interest concessions, which determine A, none other can not be the lowest.
If the lowest, then the A tender ' the amount of price reduction will be higher than the level of profits, it means that the A tender offer will be below cost price to compete.
Online since: August 2013
Authors: Xiao Hu, Yong Liang Xiong
Introduction Supercavity is a revolutionary technology to drag reduction for underwater vehicles with a high velocity, it can reach a drag reduction at 90%, and the technology brings great influences to developments of underwater vehicle[1].
And the researches by Kirschner et al[4] have verified that the ventilated and natural cavities possessed the same characteristics both in shape and drag reduction.
Numerical Simulation Comparison of Simulational Results with Classical Experimental Data.
Figures 1 and 2 present the experimental and simulational results of cavity length for cone cavitator under different cavitation numbers, the curves indicate fine consistence of experimental data and simulational results, with the reduction of cavitation number, the cavity length and maximum diameter increase.
Online since: May 2011
Authors: Li Huan Gao, Xiao Yang Tang, Yan Zhi Li
Nevertheless, the reduction in size and higher rotational velocity of the pump usually means an increase in vibration and noise as well as a reduction of pumping efficiency.
The causes of flow pulsation and its influences As shown in Fig.1,the fundamental working principle of an external gear pump is the volumetric displacement of a space that opens and is consequently filled by fluid; transport of this fluid to another zone in the machine; and reduction of this space, which increases the pressure of the fluid and forces it through the outlet pipe.
H., and Scott, W., 1996, ‘‘Comparison of an external gear pump wear model with test data,’’Wear, 196, pp. 64–71
Scott, Comparison of an external gear pump wear model with test data, Wear 196 (1996) 64–71
Pantazis, Reduction of delivery fluctuation and optimum tooth profile of spur gear rotary pumps, Mechanism and Machinery Theory 23 (1998) 141–145
Online since: June 2014
Authors: Qiang Li, Qian Sun, Hao Liu, Da Peng Wang, Ning Xi Song
Furthermore, the low voltage power dynamic compensation device system of the DCS-KB-2100 type provides the workable technical support for energy-saving and emission reduction, etc.
Its evolution accords with the direction for the development of intelligent industrial park in China, and provides an important part of technical foundation to the trend of energy-saving and emission reduction.
The data above are feeded into the power quality control center as the template.
The compensation control operations is based on these data.
The technology innovation of reactive power compensation device not only provides a support to intelligent industrial park development, but also paves a solid foundation for the development direction of the energy-saving and emission reduction.
Online since: December 2010
Authors: Yu Sen Lin, Li Hua Xin, Min Xiang
Vertical vehicle acceleration and reduction rate of wheel load are hardly varying with damping ratio.
Parameters Analysis of Train running performance on High-speed Bridge during Earthquake In this paper bridge is 32m multi-span simple beam of Qin’shen passenger transportation special line, rail irregularity is real data of Qin’shen passenger transportation special line.
Table 4 Relation of bridge damping ratio and dynamic responses of vehicle-bridge system during Qian’an wave Bridge damping ratio Vertical displacement in the middle of span(mm) Lateral displacement in the middle of span (mm) Vertical acceleration of vehicle (g) Lateral acceleration of vehicle (g) Reduction rate of wheel load ∆p/p Lateral wheel-rail force (kN) Derailment coefficient Q/P 0.01 3.548 3.481 0.082 0.0998 16.01 54.6 0.445 0.02 3.511 3.344 0.082 0.099 15.86 53.39 0.434 0.04 3.443 3.16 0.0821 0.0984 15.64 51.66 0.419 0.06 3.38 3.03 0.082 0.0977 15.56 50.42 0.409 0.08 3.34 2.919 0.082 0.0972 15.63 49.46 0.401 0.1 3.3 2.817 0.082 0.0968 15.63 48.69 0.395 Table 5 Relation of bridge damping ratio and dynamic responses of vehicle-bridge system during Kobe wave bridge damping ratio vertical displacement in the middle of span (mm) lateral displacement in the middle of span (mm) vertical acceleration of vehicle (g) lateral acceleration of vehicle (g) Reduction rate of wheel load
Vertical vehicle acceleration and reduction rate of wheel load vary less with different damping ratio.
Vertical vehicle acceleration and reduction rate of wheel load vary less with different damping ratio. 6.
Online since: December 2012
Authors: Lei Jiang, Shi Sheng Zhou, Ying Cui
In this study, according to experimental data based on the offset printing, the relationship of L*a*b* value of color and ink thickness will be determined by multiple regression method.
Employing various regression evaluation parameters and combining with the experimental data of control parameters for dimensionality reduction treatment, the optimal control parameters will be tested, thus the ink control model based on the color parameters will be set up.
Data Analysis.
This model is better of data fitting as well; Statistical parameter of SSE and RMSE closer to 0, means the model selection and fitting more better.
Area change on color printing, and the experimental data quantity, will affect the results of modeling.
Online since: December 2013
Authors: Mohd Nazri Rejab, Muhammad Naufal Mansor
Filter Infant COPE Database Image Principal Componen Analysis Principal Components Analysis (PCA) [11] constructs a low-dimensional representation of the data as possible to describe as much of the data variance.
In mathematical equation, PCA attempts to find a linear transformation, which maximizes, where the covariance matrix of the zero mean data X.
It can be shown that this linear mapping is formed by the d principal eigenvectors (i.e., principal components) of the covariance matrix of the zero-mean data.
The low-dimensional data representations yi of the datapoints xi are computed by mapping them onto the linear basis, i.e., [12].
The learning rate and momentum factor are chosen as 0.1 and 0.9 respectively Experimental Results Conventional validation scheme is used for testing the effectiveness of the results of the classifier. 80% of data are used for training and 20% of data are used for testing.
Online since: September 2014
Authors: Ze Ping Zhang, Fei Fei Li, Jia Yu
The author participated in the on-site audit period investigation, data collection, data check and audit report writing process, Through to the buildingenergy audit of Taiyuan Hall organ office buildings and large public buildings, we make an objective assessment to energy consumption level of the building,and make a quantitative analysis to the energy use status of energy building which found the building energy-saving potential, and complete completion of existing public buildings energy-saving seven million square meters during the " 12th Five-Year Plan" for Taiyuan, the unit area energy consumption fell more than 20 percent compared with the former building’s, and during the" five-second "period, public buildings achieved 10% reduction in energy consumption per unit area , the large public building energy consumption reduced by 15% to provide a basis.
Data processing.For the 252 energy consumption data from energy consumption statistical analysis to collect, according to unit energy consumption from low to high order, We find the minimum, median, four percentile, four percentile and the maximum value,from the above building energy consumption per unit area on the four percentile of 25% buildings, in accordance with relevant state regulations aside a certain amount of building construction as a key energy audit; From the construction unit area of energy below the four percentile of 25% buildings, take a certain number of buildings as the benchmarking building to audit, the 38 were selected as the energy audit object.
Data analysis and confirmation.Summary and analysis the data obtained from research and measure, and comparison of these data with the standard reference values ​​and implementation of standards.By analyzing the thermal insulation of buildings to identify existing problems, explore the potential for energy savings, corresponding energy-saving measures proposed.
On the part of the energy saving buildings for the overall energy consumption reduction has play a decisive role role.
Through meta-analysis of the data obtained building the proportion of energy consumption, As shown in Fig.2(Breakdown of large public buildings energy scale drawing).
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