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Online since: August 2013
Authors: Hua Wang, Xiu Li Sang, Song Gao, Jian Xin Xu, Han Jie Xiao, Feng Xia Han
ANALYSIS ON SEASONAL VARIATION OF RAINFALL AND RUNOFF ABOUT YUANJIANG-RED RIVER BASIN IN YUNNAN SANG XIULI1,2,a, GAO SONG1, 2, XIAO HANJIE1, 2, HAN FENGXIA1 WANG HUA2,b,XU JIANXIN1,2,c* 1Quality Development Institute, Kunming University of Science and Technology, Kunming, PR China 2Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction Ministry of Education, Kunming University of Science and Technology, Kunming, PR China asunny2008@126.com, bwanghua65@163.com, c*xujianxina@163.com Keywords: rainfall; runoff; the trends of seasonal variation; similarity Abstract.
Daily data came from Da-dong-yong, a typical provincial hydrological station, seated in Najian County of Dali Prefecture.
Results and discussion An analysis of the equal environments assumption should be made, we only considered the data from Da-dong-yong.
The variation of rainfall showed the regular of seasonal variation, we consolidated data seasonally from 2001 to 2010 and drew a line chart (in Fig.2).
By processing data in 2001-2010, runoff was different during four seasons.
Online since: March 2014
Authors: Ming Xiao
Then according to the data, the relative strategy is invoked.
Regarding ARMA(p, q) as AR(p+q), after pre-treatment of data in accordance with reality, calculating the parameters φ1, φ2, ..., φp+q of AR(p+q).
According to the predictive data by ARMA, e.g. traffic flow, the number of fans that should be open is decided [9].
Through the prediction of tunnel traffic flow, it is convenient to establish database of tunnel traffic flow which provides an effective data source for optimizing the ARMA algorithm model, meanwhile, through the ventilation of fuzzy control, the ventilation of tunnel be able to achieve peak condition with the minimum cost.
Discussion about Energy-Saving and Emission Reduction of Highway Tunnel [J].
Online since: March 2015
Authors: Xiao Zhi Qiu, Bao Hua Huang, Wei Xu, Yan Ming Zhao
Combined with the equipment data of a certain supercritical unit indirect air cooling system, and based on ANSYS software platform, build a numerical simulation model of indirect air cooling system, and then carry out the simulation of the temperature characteristics of the indirect air cooling system in different wind conditions, and provide a theoretical basis for the anti-wind device design of the indirect air cooling system.
The simulation In order to study the temperature characteristics of indirect air cooling system, combined with the cooling tower structure data of NingDong power plant, and based on ANSYS, build the cooling tower model in 1:1 ratio, as shown in Fig. 2.
In the process of model building, consider the data in the following operating conditions for the model initialization 1.
Make the numerical value calculation of the air flow of the external flow field, the heat transfer rata and the water temperature reduction value of the cooling triangle in the working condition that the water supply quantity is 74000t/h. 2.
Fig. 6 The change trend of the ventilation and heat dissipation Conclusion Combined with the equipment data of a certain supercritical unit indirect air cooling system, build a numerical simulation model of indirect air cooling system, and then carry out the simulation of the temperature characteristics of the indirect air cooling system in different wind conditions, and provide a theoretical basis for the anti-wind device design of the indirect air cooling system.
Online since: March 2015
Authors: Ling Liu, Yi Yang
Characteristics of 3D Printing Technology Advantage of 3D Printing Technology. 3D printing technology can directly generate any shape of the parts from the computer graphics data without any mold or mechanical processing.
It can directly generate any shape of parts from the computer graphics data.
Besides, due to the time of preparation and data conversion is greatly reduced, the single trial production and small batch production cycle and cost reduction, especially suitable for the development of new products and the produce of the single small batch parts.
Promote the development of 3D printing technology platform construction, including 3D printing e-commerce platform, 3D printing, data security and property rights protection mechanism, 3D printing and the surrounding project investment and financing mechanism.
Online since: November 2012
Authors: Qi Dou Zhou, Gang Ji, Han Zheng
In order to certify the validity of this method, the sound pressure radiated by an underwater ring-stiffened cylindrical shell is calculated employing the exterior Helmholtz integral equation and the SPL is compared with the experimental data of Chen and Schweikert[5].
Fig. 2 is a comparison between numerical results and experimental data.
Note that the minimum SPL of experimental data may be in error due to low signal-to-noise ratio.
Fig. 1 Dimension of the ribbed cylindrical shell Fig. 2 Comparison between experimental data and numerical results Four Different Finite Element Models.
The strengthened rib restricts the vibration of the shell, thus causes the reduction of mean square velocity level and sound radiation power level.
Online since: September 2013
Authors: Nai Jun Li, Mei Mei Li, Nai Wei Li, Ding Yi
In this experiment, the silver nitrate as a activator, the quality of coating was guaranteed effectively by the technics optimization. 2.1 The technics process The technics of electroless plating on plastic: degreasing→water washing→acid Neutralization→ water washing→coarsening→water washing→alkali neutralization→water washing→sensitizing →water washing→activating→water washing→reduction→water washing→electroless plating.
Pay special attention in processing between each processing stage:flushing plastic surface with deionized water thoroughly to strictly avoid process residue solution to the next working procedure. 2.2 Technics optimization of electroless plating copper By many times explore experiments, the bath composition was decided:CuSO4:6-8g/L; NaOH: 8-10g/L;Sodium potassium tartrate:18g/L; formaldehyde 10ml/L, and three main factors (pH, temperature, CuSO4) was designed and the three factors and three levels orthogonal design test was carried out two times, the second time data of orthogonal design experiment shown in table 1.
Table1 Orthogonal design test of electroless plating Copper number CuSO4 (g/L) pH temperature/℃ Coating quality 1 6 12 20 2.5 2 6 13 30 4.5 3 6 14 40 3 4 7 12 30 3.5 5 7 13 40 4 6 7 14 20 3 7 8 12 40 3 8 8 13 20 4 9 8 14 30 3 K1 10 9 9.5 K2 10.5 12.5 11 K3 10 10 10 k1 3.33 3.00 3.17 k2 3.5 4.17 3.67 k3 3.33 3.33 3.33 R 0.17 1.17 0.5 Gross score K - factors drawing as follows: Graph1 Trend of [CuSO4 ] in orthogonal design Graph 2 Trend of pH in orthogonal design Graph3 Trend of temperature in orthogonal design According to the orthogonal design test data, data analysis, mapping, the following conclusions can be found: (1) in the technics of the three main influencing factors, the most important factor is pH value
Quality score 1 60 40 30 2 2 60 50 35 4 3 60 60 40 2.5 4 65 40 35 4.5 5 65 50 40 5 6 65 60 30 4.5 7 70 40 40 3.5 8 70 50 30 4 9 70 60 35 3.5 K1 8.5 10 10.5 summation=31 K2 14 13 12 K3 11 10.5 11 k1 2.83 3.33 3.5 k2 4.67 4.33 4 k3 3.67 3.5 3.67 R 1.00 1.00 0.5 The graphs were drew according to the data of table 3: Graph4 Effect of T in orthogonal design Graph5 Effect of Na2WO4·2H2O in orthogonal design Graph 6 The effect of time in orthogonal design The optimum main technics condition obtained by the second orthogonal design is: temperature:65℃;concentration of Na2WO4·2H2O:50g /L;plating time:35min..
Online since: November 2016
Authors: Corrado Piconi, Sammy Noumbissi
Materials and Methods Data were collected on 85 consecutively placed one-piece zirconia implants (Z-Systems, Oensingen, CH).
An initial PTV was recorded then another immediately after abutment reduction and no statistically significant difference between the PT values was observed.
The data collected were analyzed to investigate if there was any correlation between implant diameter, length, location, insertion torque and implant surface characteristics on the pattern of osseointegration and implant stability during the four months pre-restorative.
Based on our data the implant length and diameter have no effect on the PTV values, even when the abutments had to be reduced for occlusal clearance.
The data collected during this analysis show that the laser etched surfaces have higher levels of stability than sandblasted ones.
Online since: July 2011
Authors: Yi Liu, Ya Xuan Wang, Ya Ning Zhang
Ground-source heat pump (GSHP) which is saving energy, environmental friendly and stable [3], will become the main direction of energy saving and emission reduction in the future building field [4].
The testing system is made up of a portable computer, a data acquisition card, temperature sensors, power converters, and flowmeters.
The principle is that the signals from temperature sensors, power converters and flowmeters, are processed by the data acquisition board, and then input to the computer.
In the portable computer, the MCGS software which is connected to the data acquisition device, can display and store the data timely.
Online since: September 2003
Authors: V.P. Rastegaev, Sergey A. Reshanov, I.I. Parfenova, E.I. Yuryeva, A.L. Ivanovskii
The most experimental data lead to the conclusion that the electrical and optical properties of 3d impurities arise from partially filled atomic-like 3d orbitals, which are qualitatively the same as in the isolated ions.
There are other data, however, suggesting delocalized 3d states, which strongly interact with the host.
The Uv value was evaluated from the data of [8] and was equal to 0.2 eV.
In Table 2 we present calculated and experimental data for the main TM charge state transitions in SiC.
The significant reduction of the Coulomb energies relative to their values in the free ions is a consequence of a charge self-regulating response, whereby valence-band resonances accommodate population changes in the gap levels.
Online since: August 2014
Authors: Hao Yang Yu, Yun Hong Liu
Image processing Image processing course generally includes transformation, enhancement, noise reduction, and so on.
The calculations are: (4) (5) (6) Fig. 3 Structure of the robotic arm The angles are respectively programmed into a 4 byte- direction that is immediately sent through the serial port to FPGA, which reads the data and controls the robotic arm.
The program keeps waiting until the data from the serial port arrived.
When the data comes, the slave computer judges whether the data is valuable.
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