Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: June 2010
Authors: Zhen Gong Tong
By theoretical analysis and a large number of engineering practice shows that, in the
aspect of Coagulation process the use of patented product designed of East China Jiaotong
University---- Vortex reactor(Patent Number: CN00249081), can greatly improve the efficiency of
the coagulation tank, to improve water quality, The purpose of to conserving energy, the provincial
drug, and reducing operating costs.
I have presided over and participated in a number of projects, to transform the reaction zone of the Clarifiers into a pool of micro-eddy current response, add inclined-tube to precipitation zone, improve production after the transformation of water, Water turbidity and also more stable.
When water flow through a large number of holes of the vortex reactor's wall, the small part in the formed for the small part vortex and formed for many small vortices at the same time.
Figure 3 the whirling clarification tank process flow diagram Debugging run situation After more than a year running, clarify the pool water quality such as Table 4 show: Table 4 effluent water quality Serial Number Pollutants Clarifiers outlet water quality(mg /L) Filter outlet water quality(mg /L) 1 pH 7.5 7.5 2 Suspended solids 8 1 3 Biochemical Oxygen Demand(BOD5) 20 18 4 Chemical Oxygen Demand(CODcr) 80 76 5 Total hardness(CaCO3) 350 350 From Table 4, we can see that, vortex clarify process reached the company's outlet water quality requirements.
Overall, after use of micro-eddy current reaction process, the raw water react fully, in the first vortex flocculation reaction chamber, generated the alum flower that ia clear , grain obviously, good performance of the settlement, it is shows that the high efficiency of micro-vortex response, water quantity at the time of 420m3/h, after reasonable control cast alum volume and discharge sludge timely, to clarify the pool water turbidity can be stabilized to maintain at below 3NTU, the basic control of the water turbidity at the follow 1NTU after filter by the V-filter. because of the outlet water in the clarify pool has low turbidity, the consumption of the anti-filter water also significantly reduced and extension of the work cycle.
I have presided over and participated in a number of projects, to transform the reaction zone of the Clarifiers into a pool of micro-eddy current response, add inclined-tube to precipitation zone, improve production after the transformation of water, Water turbidity and also more stable.
When water flow through a large number of holes of the vortex reactor's wall, the small part in the formed for the small part vortex and formed for many small vortices at the same time.
Figure 3 the whirling clarification tank process flow diagram Debugging run situation After more than a year running, clarify the pool water quality such as Table 4 show: Table 4 effluent water quality Serial Number Pollutants Clarifiers outlet water quality(mg /L) Filter outlet water quality(mg /L) 1 pH 7.5 7.5 2 Suspended solids 8 1 3 Biochemical Oxygen Demand(BOD5) 20 18 4 Chemical Oxygen Demand(CODcr) 80 76 5 Total hardness(CaCO3) 350 350 From Table 4, we can see that, vortex clarify process reached the company's outlet water quality requirements.
Overall, after use of micro-eddy current reaction process, the raw water react fully, in the first vortex flocculation reaction chamber, generated the alum flower that ia clear , grain obviously, good performance of the settlement, it is shows that the high efficiency of micro-vortex response, water quantity at the time of 420m3/h, after reasonable control cast alum volume and discharge sludge timely, to clarify the pool water turbidity can be stabilized to maintain at below 3NTU, the basic control of the water turbidity at the follow 1NTU after filter by the V-filter. because of the outlet water in the clarify pool has low turbidity, the consumption of the anti-filter water also significantly reduced and extension of the work cycle.
Online since: November 2014
Authors: Xiao Zheng, Zhi Qiang Song, Bin Tu, Cheng Yin, Dong Ping He, Pei Shi Qi, Lu Lu Zeng
The actual type, numbering and quantity of the samples in each set are presented in Table 1.
However, the model obtained by characteristic wavelength modeling could remove irrelevant information; the number of modeling parameters was reduced from 451 to 66, thus shortening the modeling time.
The experiment showed that the OSC preprocessed SVR model had the least number of wavelengths, small parameters, and the best stability.
China Grain Economy,2008,(3):17-18
[8] Zhiqiang Song, Xiong Shen, Xiao Zheng, Peishi Qi, Yong Yang, Huiwen Fang.Low Carbon Number Fatty Acid Content Prediction Based on Near-Infrared Spectroscopy[J].Spectroscopy and Spectral Analysis,2013,33(8):2079-2082
However, the model obtained by characteristic wavelength modeling could remove irrelevant information; the number of modeling parameters was reduced from 451 to 66, thus shortening the modeling time.
The experiment showed that the OSC preprocessed SVR model had the least number of wavelengths, small parameters, and the best stability.
China Grain Economy,2008,(3):17-18
[8] Zhiqiang Song, Xiong Shen, Xiao Zheng, Peishi Qi, Yong Yang, Huiwen Fang.Low Carbon Number Fatty Acid Content Prediction Based on Near-Infrared Spectroscopy[J].Spectroscopy and Spectral Analysis,2013,33(8):2079-2082
Online since: July 2021
Authors: Muttaqin Hasan, Hamzani Hamzani, Munirwansyah Munirwansyah, Sugiarto Sugiarto, Zulfhazli Zulfhazli
Coarse aggregate was used in the form of open graded stone split with a maximum grain size of 19 mm in accordance with the AAPA 2004 specification [22].
From the test results, the relationship between the deformation and the number of wheel tracking passing is presented in Figure 1.
From the fatigue test results the relationship between flexural stiffness and the number of loading cycles for all SFP mixtures can be drawn as presented in Figure 1.
The stiffness of SFP with 5% and 15% zeolite content decreased with increasing in number of loading cycles up to 50 cycles.
In this study, the number of loading cycles at the SFP mixtures have no more stiffness denotes as fatigue life.
From the test results, the relationship between the deformation and the number of wheel tracking passing is presented in Figure 1.
From the fatigue test results the relationship between flexural stiffness and the number of loading cycles for all SFP mixtures can be drawn as presented in Figure 1.
The stiffness of SFP with 5% and 15% zeolite content decreased with increasing in number of loading cycles up to 50 cycles.
In this study, the number of loading cycles at the SFP mixtures have no more stiffness denotes as fatigue life.
Online since: December 2023
Authors: Glenn Carlo M. Miranda, Persia Ada N. de Yro
Grain sizes in most crystalline materials (like metals), usually dictates its strength.
The addition of heat modifies the grain structures of a material, this also known as recrystallization; a process wherein on a specific temperature range, new set of equiaxed and stress-free grains are formed.
This zone is also known as the recrystallization zone – the area where the grain sizes grow.
To determine the best parameter combination on the given numerical data, the numbers were plugged in to SAS-JMP software for prediction profiler analysis.
The addition of heat modifies the grain structures of a material, this also known as recrystallization; a process wherein on a specific temperature range, new set of equiaxed and stress-free grains are formed.
This zone is also known as the recrystallization zone – the area where the grain sizes grow.
To determine the best parameter combination on the given numerical data, the numbers were plugged in to SAS-JMP software for prediction profiler analysis.
Online since: July 2021
Authors: Gabriel C. Dias, Lincon Zadorosny, Alex O. Sanches, Mirian C. Santos, Luiz F. Malmonge
it has been growing and the number of published works has been increasing and it has been spreading the Solution Blow Spinning technique and its variations in recent years.
The formation of the β crystalline phase by this technique may be related to the stretch suffered by the polymeric grain during the sample manufacturing process.
PVDF - α is obtained from the DMF solution under high solvent evaporation rates, a fact that can occur in SBS, because as all the solvent must evaporate on the way between the nozzle and the collector, this process must be very fast, forming polymeric grains in the α phase [13,14] These grains under the effect of high pressure are stretched to form the fibers, altering in this process the conformation of their chains, inducing the phase transition.
The formation of the β crystalline phase by this technique may be related to the stretch suffered by the polymeric grain during the sample manufacturing process.
PVDF - α is obtained from the DMF solution under high solvent evaporation rates, a fact that can occur in SBS, because as all the solvent must evaporate on the way between the nozzle and the collector, this process must be very fast, forming polymeric grains in the α phase [13,14] These grains under the effect of high pressure are stretched to form the fibers, altering in this process the conformation of their chains, inducing the phase transition.
Online since: June 2014
Authors: Wolfram Fürbeth, Sigrid Benfer, Guntram Wagner, Benjamin Strass, Bernd Wolter, Christian Conrad
Compared to welds with oxides, oxide-free welds show 50 to 100% higher number of cycles to failure [30].
The Mg alloy AZ80 consists of grains with a grain size in the range of 630 µm.
Eutectic was found at the grain boundaries (Fig. 20).
The Mg alloy AZ80 consists of grains with a grain size in the range of 630 µm.
Eutectic was found at the grain boundaries (Fig. 20).
Online since: January 2014
Authors: Cheng Jun Ge, Hua Mei Yu, Miao Chen, Hui Deng
Table 1 Phy-chemical properties of soil
soil
pH
1:20
organic
%
texture (%)
sand grain clay grain silt grain
laterite
5.34
3.23
34.12
25.68
40.19
paddy soil
4.52
4.19
42.09
33.99
23.92
dry red soil
5.83
0.11
97.97
1.23
0.8
Biochar production.
After biomass was pyrolysed, the number of micropore and specific surface areas increased.
After biomass was pyrolysed, the number of micropore and specific surface areas increased.
Online since: May 2010
Authors: Vincent Dutilh, Joel Alexis, Géraldine Perrin, Gilles Dessein
Primary coarse precipitates γ' are clearly visible at the grain boundaries and fine cuboidal γ' are
embedded coherently throughout the γ matrix [1].
These bars have the same heat treatments as the discs (solution and aged) to obtain the nearest characteristics to the discs ones (same microstructure, same grain size ≥ 8 ASTM, and same hardness ≥ 410 HV30).
The only difference between the discs and the bars is the grain flow due to the last forging operation.
Acknowledgments The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-2011) under grant agreement number 213855.
These bars have the same heat treatments as the discs (solution and aged) to obtain the nearest characteristics to the discs ones (same microstructure, same grain size ≥ 8 ASTM, and same hardness ≥ 410 HV30).
The only difference between the discs and the bars is the grain flow due to the last forging operation.
Acknowledgments The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-2011) under grant agreement number 213855.
Online since: June 2020
Authors: Vicente G. Ruiz de Argandona, Victor Cárdenes, Álvaro Rubio-Ordoñez
The current ASTM C406 and EN 12326 standards define roofing slate as fine-grained metamorphic rock with good development of cleavage.
The next rock in the range of metamorphism is slate s.s.: a fine-grained rock from the greenschist facies with a well-developed slaty cleavage.
Due to the homogeneity of the grain size and the penetrative cleavage, this lithotype is highly versatile and easy to shape for the slater.
The CaCO3 content is higher in B roofing slates due to the higher number of data compared with schists or phyllites.
The next rock in the range of metamorphism is slate s.s.: a fine-grained rock from the greenschist facies with a well-developed slaty cleavage.
Due to the homogeneity of the grain size and the penetrative cleavage, this lithotype is highly versatile and easy to shape for the slater.
The CaCO3 content is higher in B roofing slates due to the higher number of data compared with schists or phyllites.
Online since: March 2019
Authors: Ramesh Chandwani, Chris Timbrell, Chun Lei Ma
The crack growth law may be a function of a number of parameters including stress ratio, R, load frequency, load cycle waveform and temperature.
In a brittle mode, the crack growth takes place essentially in a continuous manner along the grain boundary through a grain sliding mechanism.
The analysis uses temperature dependent Young’s modulus and Poisson ratio for coarse grained RR1000.
In a brittle mode, the crack growth takes place essentially in a continuous manner along the grain boundary through a grain sliding mechanism.
The analysis uses temperature dependent Young’s modulus and Poisson ratio for coarse grained RR1000.