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Online since: February 2014
Authors: Ming Yu Li, Qing Xuan Zeng, Yan Qiang Jian
Langmuir linear equation model can well describe the adsorption equilibrium data suggesting that the adsorption process involves both chemisorption and physisorption.
The conventional process of Cr (VI) removal is the combination of chemical reduction converting Cr (VI) into Cr (III) and chemical precipitation in which Cr (III) precipitates as Cr(OH)3 [5, 6], Although the chemical reduction and precipitation method is simply and economical, it will brings sludge disposal problem and requires high cost on final filtration for secondary treatment [7]. adsorption, reduction, electrolysis, liquid membrane, ion exchange and other methods [8, 9, 10]are also advised for Cr (VI) removal.
Several adsorption isotherm models, such as Langmuir, Freundlich were employed to describe the adsorption equilibrium vs. equilibrium concentration of the anions (mg/L) and Langmuir models are proved to be the better one to fit the data attained in the experiment.
As we can see, all the data are fitted very well by Langmuir equation with linear correlation coefficients greater than 0.99. thus, it is concluded that Cr (VI) adsorption is a monolayer adsorption process and the adsorption between Cr (VI) ion and the active sites on TCIEF are chemisorption property.
Table 2 Thermodynamic parameters for adsorption of Cr (VI) on TCIEF qe/(mg/g) ΔH/(kJ/mol) ΔG/(kJ/mol) ΔS/(J/mol×K) 293 K 303 K 323 K 293 K 303 K 323 K 80 3.111 -3.066 -12.45 -2.269 21.08 51.35 16.66 90 8.736 -3.988 -13.14 -2.275 43.43 72.20 34.09 100 19.96 -5.490 -13.88 -3.352 86.86 111.7 72.17 Conclusion A new type of ion exchange fiber is successfully prepared for the removal of Cr (VI) from water, The langmuir model can describe all the adsorption data with correlation coefficients greater than 0.99.
Online since: August 2014
Authors: Ji Feng Liu, Xiao Lan Yang, Han Song Yang, Bing Zhi Kong, Jia Wei Li, Meng Nan Si
Prediction of the possible vibration intensity extreme points and its distribution are processed data mining and prediction by sensor signal amplification, analog-digital conversion, and online monitor.
It still has some difficulties in the study of the effective control of this system through modern nonlinear dynamics theory[4,5], thus it is a positive decision-making attempts the research of high vibration intensity parameters, line monitoring, data mining, predictive calculations and advanced drop control[5,6].
The data mining and advance calculation should be based on the default frequency conversion curves [8, 9], and then frequency control decision could be judged, reasoned and corrected by constraint conditions.
According to the former waves, the maximum value of median wave can be predicted, and advance control amplitude reduction function can be achieved.
Overtime and over-limited value of main parameters are determined by constraints, and advance reduction amplitude and emergency stop function are carried out if the reduction amplitude is not enough.
Online since: February 2016
Authors: Alexey Korchunov, Alexander Pesin, D.O. Pustovoytov
An agreement of simulation results with experimental data is shown.
To ensure equivalent strain at 2.0-3.5 during asymmetric sheet rolling with a 75% reduction, shear angle of metal layers should be 65-80°.
According to experimental data of [10] dislocation density after asymmetric rolling of Al 7075 is (5.5±0.5)×1014.
Thus, simulation results for = 2 agree well with available experimental data [10].
A good agreement of simulation results with experimental data is shown.
Online since: October 2014
Authors: Wan Jun Fu
The Technology of High Efficiency Water Purification Wan-Jun FU Northeast Dianli University Jilin city 132012, P R China fuwanjun2002@163.com Keywords: Water Purification, Energy Saving, Emission Reduction.
The technology has the advantages of energy saving and emission reduction efficiency greatly, is currently the most advanced water purification.
Quartz sand filter and soft fiber filter the actual data comparison results are shown in Table 2 Table 1 The Water Purity and Filler Interception Capacity Species inlet water suspensions (NTU) out water suspensions (NTU) Interception capacity (g/cm3) Max Min Average Max Min Average Average Quartz sand 23.60 18.10 20.20 6.50 1.52 4.01 0.0125 Soft fiber 23.60 18.10 20.20 1.56 0.40 0.98 0.2450 Table 2 The Water Flow, Filtration Cycle and Cleaning Water Consumption Species The water flow (t/h.m2) filtration cycle (h) cleaning water consumption(%) Max Min Average Max Min Average Average Quartz sand 15 7.5 12.5 23 9 18 3.1 Soft fiber 45.5 22.0 32.0 50 20 36 0.85 Filtration Water Head Loss (Filtration Resistance) In the effective filtration cycle of quartz sand filter, the initial head loss (filtration resistance) increased sharply, linear has been stable in the mid to late filtration rise, greatly, is approximately linear increase.
Online since: July 2013
Authors: Xian Long Yue
Collection and Application of the Discontinuous Energy Xianlong Yue North China Electric Power University, Hebei Baoding 071003 Keywords: Energytransformation, Energycollection, Counting, Energy Conservation and Emission Reduction.
It can save energyconsumption but cater to the idea of energy conservation and emission reduction.
References [1] China's 2010 population census data,China Statistics Press,The National Bureau of statistics of population and social science and Technology Statistics,2012
Online since: June 2014
Authors: Shahab Shariatmadari, Reza Abbasabadi Hassanzadeh, Ali Chegeni, Seyed Alireza Ghazanfari, Mahdi Nakisa
Slightest reduction of this drag can lead to substantial fuel preservation and higher cargo capacity of airships [1].
( 1 ) For Example, parameters of the profiles 58- 4165 are as the following numbers: FR = L / d ( 2 ) Getler’s accurate data have been used by many scholars to test the numerical processes.
For the bulk Reynolds number defined based on body volume of Rev= 1.8 × 107, 60% reduction on the conventional torpedoes could be achieved.
[3] Lutz, T. andWagner, S., Drag Reduction and Shape Optimization of Airship Bodies, J. of Aircraft, Vol 35 No. 3, pp. 345-351, (1998)
H., Underwater Vehicle Drag Reduction Through Choice of Shape, AIAA Paper 66-657, (1966)
Online since: August 2008
Authors: Toly Chen, Yi Chi Wang, Yu Cheng Lin, Kai Hsiang Yang
Conversely, huge amount of data and lengthy simulation time are two disadvantages of PS.
On the other hand, much less time and fewer data are required to generate a cycle time forecast with a BPN than with PS.
At first, the data of the jobs are sorted in ascending order of the prediction error.
Then the sorted data is divided into m equal parts.
Experimental Results and Discussion Test Data Collection.
Online since: February 2014
Authors: Seyed Ali Hashemian, Behnam Moetakef Imani
Dimension reduction.
In order to overcome this difficulty, Rahman and Xu [12] proposed the dimension reduction (DR) method which converts a multi-dimensional integral to multiple one-dimensional integrals: (2) Youn et al. [13] developed an enhancement of the DR method which is referred to as the enhanced dimension reduction (EDR) method.
The accuracy of the response approximation increases as the number of data points.
However, dealing with a large number of data points it is not economically reasonable.
Geometric covariance matrix Principal variance matrix Test pieces A Test pieces B In order to investigate the efficiency of the presented methodology, a set of 1000 assemblies were also simulated and the results are compared and evaluated with experimental data as represented in Table 3.
Online since: September 2016
Authors: Jian Chen, Zheng Qiang Lei, Fu Xiang Wang, Ting Wang, Li Jian Zhou
In this study, features of ILI data are investigated to elaborate the necessary of filtering analysis for strain analysis of the dent with ILI data.
Then typical filtering methods are used to smooth the ILI data, and strain analysis are carried out with the smoothed data to study the practicability of strain assessment.
However, strain analyses require tedious calculation of dent curvature at each data of ILI.
Thus to filter original ILI data is necessary for strain estimation of the dent.
The minimum radius and the maximum radius are located in ILI data 1 and 3.
Online since: August 2011
Authors: Yu Wan, Ai Min Du, Da Shao, Guo Qiang Li
Validity of Model Fig. 2~4 compare power, torque and BSFC between simulation data and test data of original engine.
The results show that simulation dada is close to test data, maximum error is less than 5%, which can satisfy the practical needs of engineering, and model can effectively assist the following research.
l Reduction of volumetric efficiency l Reduction of effective CR, decrease of the thermal efficiency l Increase of temperature and pressure in cylinder before combustion, decreases of combustion efficiency l Obvious reduction of dynamic performance at middle and high speed It is obvious that LIVC itself cannot fully exploit latent potentialities of extended expansion gasoline engine, in order to overcoming these limitations caused by LIVC, further improving its fuel consumption and dynamic performance, the following solutions are put forward.
Reduction of volumetric efficiency caused by LIVC is a key poser when extended expansion gasoline engine is applied, turbocharging is an effective solution.
CO2-Emission Reduction by Means of Enhancing the Thermal Conversion Efficiency of ICE Cycles.
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