The Development of Haydite Biological Filter by Natural Zeolite Doped with Fly Ash

2012 ◽  
Vol 529 ◽  
pp. 478-481
Author(s):  
Yun Fen Shi ◽  
Xiang Xuan Zhan ◽  
Geng Yu Zhang
Keyword(s):  
Fly Ash ◽  
Natural Zeolite ◽  
Design Method ◽  
Tap Water ◽  
Orthogonal Design ◽  
Drying Time ◽  
Biological Filter ◽  
Orthogonal Design Method ◽  
Electronic Microscope ◽  
Natural Drying

Complex natural zeolite, fly ash, coment and adherent were chosen as the initial components for preparing biological filter haydite of 5- 7 mm in diameter used in wastewater. The haydite preparation using orthogonal of experiment measured the bulk density, apparent density, specific surface area, crushing strength and wear rate. According to the principles for making aggregates and the results of the orthogonal design method obtained the optimal ratios of the components and reaction time. The results show that zeolite quantity 60%, coment-to- fly ash 6:4 , adherent quantity 4%, zeolite haydite natural drying time 2.8 h, curing in tap-water 28 d. The microstructures and characters of zeolite aggregates were observed by scanning electronic microscope.

Effect of Carbonization Impact on Compressive Strength of Cement-Fly Ash Mortar Subjected to Freeze-Thaw Cycles

2013 ◽  
Vol 454 ◽  
pp. 209-212 ◽  
Author(s):  
Xiang Li ◽  
Ming Xia Li ◽  
Xiao Ming Shen ◽  
Hua Quan Yang
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Frost Resistance ◽  
Design Method ◽  
Orthogonal Design ◽  
Factors Affecting ◽  
Freeze Thaw ◽  
Orthogonal Design Method ◽  
Reasonable Range ◽  
Main Factors

The effect of carbonation on compressive strength of cement-fly ash mortar which subjected to freeze-thaw cycles were investigated by means of orthogonal design method. The results show that carbonization time is the main factors affecting compressive strength of cement-fly ash mortar subjected to freeze-thaw cycles, followed by the water-cement ratio, the number of freeze-thaw cycles and mix amount of fly ash. Carbonization improves the frost resistance of concrete in some extent, and in a reasonable range, the longer carbonation time is, the stronger frost resistance capacity is.

The Study on Solid Superacid Synthesis of K12A with Manufacturing Equipment

2012 ◽  
Vol 583 ◽  
pp. 285-288
Author(s):  
Dong Mei Zhao ◽  
Xue Peng Liu
Keyword(s):  
Catalytic Activity ◽  
Metal Oxide ◽  
Design Method ◽  
Orthogonal Design ◽  
Manufacturing Equipment ◽  
Solid Superacid ◽  
Orthogonal Design Method ◽  
Superacid Catalyst ◽  
Calcined Temperature ◽  
Very High

By orthogonal design method, Catalytic activity of /ZrO2 solid superacid is studied, and the influence of catalyst characteristic and structure by manufacturing equipment is issued. It is concluded that the best prepared conditions of the superacid catalyst /ZrO2 for the synthesis of Octyl-Polyglycoside are followed:(1) PH=9.5; (2) calcined temperature at 500; (3) M(H2SO4)=0.5mol/L. Using this kind of catalyst the conversion of glueoside may reach as high as 96% in the synthesis of OCtyl-Polyglycoside and the selectivity is very high for the synthesis of Octyl-Polyglycoside. By introducing other metal oxide, the catalytic activity of complex solid superacid is studied.

scholarly journals Optimization of Evodiamine-Imprinted Composite Membrane by Orthogonal Design Method

2013 ◽  
Vol 25 (18) ◽  
pp. 10425-10430
Author(s):  
Huiling Cheng ◽  
Guangyan He ◽  
Xiufang Zhu ◽  
Hao Zhou ◽  
Mingfeng Wang ◽  
...  
Keyword(s):  
Composite Membrane ◽  
Design Method ◽  
Orthogonal Design ◽  
Orthogonal Design Method

The Research of the Lime Soil Properties on the Road in Jilin Area

2012 ◽  
Vol 446-449 ◽  
pp. 2478-2481
Author(s):  
Dong Guo Li ◽  
Gui Mei Shi
Keyword(s):  
Design Method ◽  
Orthogonal Design ◽  
General Rule ◽  
Effect Factor ◽  
The Road ◽  
Orthogonal Design Method ◽  
Region Difference ◽  
Stabilized Soil ◽  
On The Road ◽  
Special Region

Lime soil, literature [1] just gave a general rule to the mixture’s composition design. Because of the soil’s ingredient region difference, the reasonable mix of lime soil in special region must be determined by the test. This paper first quoted the formation of lime soil’s strength and the effect factor, and then regarded the non-side limitation compressive strength at different ages as inspection norm. Used orthogonal design method, the mix for the lime stabilized soil in Jilin area was investigated in this paper. The optimum mix and the main effect factor was determined by the strength at 28 days and verified by the regression strength at 90 days. In the meantime, the key problem had been summarized on the lime stabilized soil construction point and quality control.

Study of Sleeper Concrete early Strength Based on Orthogonal Experiment

2013 ◽  
Vol 448-453 ◽  
pp. 1316-1320
Author(s):  
Hai Chao Wang ◽  
Ke Qiu ◽  
Shu Ling Gao
Keyword(s):  
Fly Ash ◽  
Design Method ◽  
Orthogonal Experiment ◽  
Orthogonal Design ◽  
Steam Curing ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Early Strength ◽  
The Difference ◽  
Railway Sleeper

Using orthogonal design method of four factors and three levels, make a mix ratio experiment on sleeper concrete of China's railway sleepers, used steam curing concrete early compressive strength (stripping strength) as evaluation index. Study on different experimental factors of water-cement ratio, sand ratio, fly ash and admixture differently influenced on the early strength of sleeper concrete and analyze the difference impact of each factor and level for the orthogonal experiment. The result shows that the admixture is the main factor for early strength of concrete, followed by fly ash, water-cement ratio and sand ratio. It can provide technical guidance for railway sleeper field and has practical value.

scholarly journals Orthogonal Design Method for Optimizing Roughly Designed Antenna

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Qing Zhang ◽  
Sanyou Zeng ◽  
Chunbang Wu
Keyword(s):  
Design Method ◽  
Orthogonal Design ◽  
Simulation Software ◽  
Specific Region ◽  
Antenna Design ◽  
Wire Antenna ◽  
Real World Application ◽  
Orthogonal Design Method ◽  
Numerical Electromagnetics ◽  
Geometrical Factors

Orthogonal design method (ODM) is widely used in real world application while it is not used for antenna design yet. It is employed to optimize roughly designed antenna in this paper. The geometrical factors of the antenna are relaxed within specific region and each factor is divided into some levels, and the performance of the antenna is constructed as objective. Then the ODM samples small number of antennas over the relaxed space and finds a prospective antenna. In an experiment of designing ST5 satellite miniantenna, we first get a roughly evolved antenna. The reason why we evolve roughly is because the evolving is time consuming even if numerical electromagnetics code 2 (NEC2) is employed (NEC2 source code is openly available and is fast in wire antenna simulation but not much feasible). Then the ODM method is employed to locally optimize the antenna with HFSS (HFSS is a commercial and feasible electromagnetics simulation software). The result shows the ODM optimizes successfully the roughly evolved antenna.

Preparation and Sintering Behavior of Au Conductor Pastes for LTCC Substrate

2005 ◽  
Vol 475-479 ◽  
pp. 1763-1766 ◽  
Author(s):  
Yan Wang ◽  
Yang Liu ◽  
Ju Sheng Ma ◽  
Zhaowen Dong ◽  
Mingli Yin
Keyword(s):  
Electrical Conductivity ◽  
Particle Size ◽  
Design Method ◽  
Orthogonal Design ◽  
Average Particle Size ◽  
Sintering Behavior ◽  
Average Particle ◽  
High Electrical Conductivity ◽  
Orthogonal Design Method ◽  
Ltcc Substrate

Fine Au powders with spherical morphology and good dispersivity were produced. The average particle size is 1~2m. The influences of constituents on the rheology of organic vehicles were investigated by orthogonal design method. Consequently, the compatible Au thick film pastes for LTCC substrate have been prepared. SEM was carried out to study the sintering behaviors and microstructures of the buried pastes with LTCC substrate. These pastes have high electrical conductivity (less than 3m/sq.), reliable wire bond strength (greater than 9 grams, 25m Au wire) and fine line printability (as small as 80m). The via filling technology was also discussed in this paper.

scholarly journals Surface Roughness Prediction Model for Machining O1 Die Steel Through EDM

2019 ◽  
Vol 4 (2) ◽  
Author(s):  
Jai Prakash ◽  
Ashish Agarwal ◽  
Vipin
Keyword(s):  
Mathematical Model ◽  
Surface Roughness ◽  
Current Pulse ◽  
Process Parameters ◽  
Design Method ◽  
Orthogonal Design ◽  
Die Steel ◽  
Orthogonal Design Method ◽  
Roughness Prediction ◽  
Taguchi Orthogonal Design

The objective of this paper is to generate a mathematical model in order to minimize the value of surface roughness (Ra) through EDM by constructing an objective function consisting of combination of process parameters. Taguchi orthogonal design method of experiments with three process parameters viz., current, pulse-on-rate, pulse-off-rate were used to generate 25 numbers of experiments L25 at five levels. Experiments were carried out in Electronica S50 (CNC) EDM. Data obtained for performance measurement was subjected regression analysis using ANOVA. Equation was obtained for the surface roughness as a function of current, pulse-on rate, pulse-off-rate.It is found that discharge current, pulse-on-rate, and pulse-off-rate have significant effect on the Ra. Higher values of current and pulse-on-rate increased surface roughness. Lower current, lower pulse-on-rate and relatively higher pulse-off-rate produced a better surface finish.

scholarly journals Modal characteristics of harmonic gear transmission flexspline based on orthogonal design method

Open Physics ◽  
2021 ◽  
Vol 19 (1) ◽  
pp. 819-827
Author(s):  
Leyu Wei ◽  
Jie Yang ◽  
Changlu Wang ◽  
Xingxing Wang ◽  
Xinmeng Liu
Keyword(s):  
Finite Element ◽  
Optimal Design ◽  
Natural Frequencies ◽  
Design Method ◽  
Orthogonal Design ◽  
Structural Parameters ◽  
Gear Transmission ◽  
Modal Characteristics ◽  
Orthogonal Design Method ◽  
The Stability

Abstract The flexspline features several modal characteristics that are related to its structural parameters, which could impose an impact on the stability and reliability of the system of harmonic gear transmission. In this article, we have integrated the method of orthogonal design with the approach of finite element, so as to study the modal characteristics of flexspline under varying structural parameters. Furthermore, we have analyzed the ways of how varying structural parameters could impose an impact on the first eight-order natural frequencies of flexspline. In addition, by adopting the method of range and variance analysis for the obtained data, we have examined the influence imposed by varying structural parameters on the modal characteristics of flexspline, which could lay a foundation for the optimal design of the structural parameters of flexspline.

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