Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: September 2014
Authors: Farshad Akhlaghi, Shaya Saffari
It has also been documented that applying ultrasonic or mechanical vibration to a solidifying melt can lead to grain refinement of the alloy and formation of a non-dendritic and globular structure [13, 14].
For image processing, a total number of 100 randomly selected particles were analyzed in a total measured area of 300 mm2 per specimen.
A number of these nuclei are detached from the surface as a result of applying shear stress and are distributed into the melt to generate a large number of refined primary Mg2Si particles.
Therefore the number of nuclei suspended in the molten alloy entering the mold cavity is increased and consequently the size of Mg2Si particles is decreased.
The number of the seed crystals and the extent of the shear stress applied on them are therefore affected by the vibration action.
Online since: January 2013
Authors: Lei Zhang, Kai Teng, Li Juan Yang, Wen Jin Wu, Lu Fang Qin
Based on the image, the selection of an appropriate number of magnetrons corresponding to the defects to heat can be made.
Two steps algorithm was adopted: first, transformation of grayscale image into binary image by thresholding algorithm is conducted and second, through region growing, the defect pixels are gathered together and grain noise pixels in background are eliminated.
The number of grids equals to the magnetrons' number.
For one thing, the manual is unrestricted with the number and location of the defects.
Because the limited number of pins of MCU has to manipulate a large number of magnetrons, some signal latching components are used.
Online since: December 2014
Authors: Fang Chun Di, Li Xin Li, Yu Jia Li, Qing Bo Yang, Jing Hua
Secondly, it is difficulty to testing the software independently for the developer when the testing task needs large number of concurrency, data volume and time-consuming.
Virtualization is characterized by resource sharing, resource customization, fine-grained resource management.
Application of cloud platform management technology can make numbers of servers working together efficiently, service deployment and provisioning conveniently and discovery and restoration fault quickly.
Testing platform can simulate numbers of operations such as concurrent accessing and uploading simultaneously.
Users only need to provide testing requirements, such as the number of concurrent users and concurrent operation.
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.
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.
Online since: November 2014
Authors: Zhi Qiang Song, Bin Tu, Cheng Yin, Dong Ping He, Pei Shi Qi, Xiao Zheng, 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
Online since: January 2011
Authors: Xiao Jie Li, Ning Luo, Min Li Bai
And then utilization of the arc-discharge process for the vaporization of graphite electrodes demonstrated that it was possible to produce fullerene molecules and serendipitous a large number of other closed hollow carbon structures in macroscopic quantities [2-3].
The mixed precursors are consisted of a certain mole number and proportion agents.The selected crude carbamide dissolved in solvent and reacted with metal nitrates to get the metal complexes, and then added the anhydrous alcohol and PETN/RDX into the mixture.
Well crytallized bcc-Fe, fcc-Co and fcc-Ninanocrystal were encapsulated in graphitic carbon with perfect core/shell structure and with a grain size in the range of 10-20nm.The nanosize iron particles showed strong XRD peaksand exhibited ferromagnetism and superparamagnetism.
Online since: April 2012
Authors: Jian Guang Li, Ying Xue Yao, Jin Guang Du
The sample used in the test was Al2024/SiC/45p, which is Al2024 alloy reinforced by 45% SiC particles with grain diameter of about 5 μm.
The definition of the loss function (L) for machining performance results yi of n repeated number is: (1) The S/N ratio for the ith performance characteristic in the jth experiment can be expressed as: HB=η=-10lgVT (2) Fig. 1 Taguchi design method process Table 3 Experimental design and results using L9 orthogonal array Exp.
Further more, as grind wheel speed keeping on increasing the number of grits through the contact area per unit time increased.
Online since: July 2012
Authors: Hong Zhong, Jian Rong Xue, Jin Zhong Li
Cellulose molecules can be expressed as the simple (C6H10O5) n, n (n = 3000-10000) for the degree of polymerization,being the number of cellulose units.
Low degree of polymerization, the sugar unit number in 60-200, arrangement loose, and no crystal structure, these facters make hemicellulose hydrolyze easily.
Sugarcane molasses leaching local oxidation manganese ore process in Su,s research[13], the result showed that leaching 97% of manganese and iron and aluminum leaching rate of only 32.4% and 21.5% when the reaction conditions are as follow: 90 ˚C, mineral grain size being less than 0.147 mm, 60 g•L-1sugarcane molasses, 1.9 mol•L-1acid,and 120 min.
Online since: February 2004
Authors: Larry D. Hefti
This process, while being expensive to implement due to high tooling and raw material costs, saves a significant amount of money over the life of an airplane program due to greatly reducing the number of detail parts, which reduces the amount of expensive assembly that is required.
The process will be used to reduce part count as well as the number of fasteners, assembly time, and weight all of which leads to cost savings for the product.
Once the individual grains on the surface touch each other, they start growing across the interface of the two sheets.
Showing 23771 to 23780 of 28673 items