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Online since: August 2013
Authors: Min Zhi Yu, Xian Kui Li
(1) Longer P.S.T (Positive Strip Time) causes the increase of powder consumption, therefore the reduction in liquid friction force of the meniscus vicinity
(2) During the P.S.T, the difference between mold velocity (Vm) and casting speed (Vc), namely the value of (Vm-Vc) decreases, which leads to the reduction of the tensile stress in the strand shell below the meniscus
The two models are drawn as the actual dimensions and loads, and there are only few input data needed such as cross-sectional area, material properties, moment of inertia, and so on
Online since: February 2013
Authors: Guo Bing Qiu, Wen Xia Liu, Jian Hua Zhang
The simulation procedure is illustrated in Fig.3: Fig.3 Simulation procedure Example Analysis Data of Wind Farm.
Case 1: based on wake effect model in flat terrain without considering the outages of WTs and connection cables; Case 2: based on wake effect model in complex terrain without considering the outages of WTs and connection cables; Case 3: based on wake effect model in complex terrain only considering the outages of WTs; Case 4: based on wake effect model in complex terrain considering the outages of both WTs and connection cables; Table 2 shows the results calculated by Matlab program.As can be seen from Table 2: 1) the power output of wind farm based on wake effect model in flat terrain is 2.3% less than in complex terrain, because as the height increases, the wind speed becomes larger. 2) the reduction of the power output of wind farm is relatively small only considering the outages of WTs, especially when the wind speed is small. 3) the reduction of the power output of wind farm is 0.24% more when considering the outages of connection cables.
Online since: August 2015
Authors: T. Suresh, C. Selva Senthil Prabhu, F. Justin Dhiraviam, V. Naveen Prabhu
In the absence of intercooler in front of the radiator, air will flow freely over the radiator, resulting in the reduction of coolant temperature from 95ºC to 92ºC.
Table 2 Properties of hot fluid – Case 2 Mass flow Inlet temperature Outlet temperature Ambient temperature 0.0783 kg/s 308 K (35℃) 372K (99℃) 308 K (35℃) Calculations and Dimensions for Optimized New Arrangement Using the data of the selected trial 3 from the previous arrangement, a modification is done only to the fins for easy manufacturing.
Ward, The Reduction of Turbocharger Whoosh Noise for Diesel Powertrains Turbocharged Automotive Engine Performance, 8th International Conference on Turbochargers and Turbo charging.
Online since: May 2012
Authors: Yong Fu Guo, Tian Yin Huang, Le Zhong Xu, Wei Wu, Wen Cheng Huang, Hong Zhang, Yong Jian Liu
Wastewater sorts Discharged flow rate (m3/d) Pollutant factors 1 Nickel wastewater 5 Ni2+<963.5 mg/L, pH=3-4, CODcr<300 mg/L 2 Low concentration washing wastewater 916.4 SS<80 mg/L, NH4+-N<27 mg/L, P<3 mg/L, pH=3-4, CODcr =100-200 mg/L 3 High concentration acidic wastewater 10 TP<11000 mg/L, pH<2, CODcr <100 mg/L 4 Degreasing wastewater 58 TP<120 mg/L, pH>8, CODcr <2000 mg/L 5 Chromium wastewater 150.1 Cr6+<100 mg/L, pH=1-2, CODcr <100 mg/L 6 Dye wastewater 40 pH=9-10, CODcr <3000 mg/L 7 Fluorine wastewater 35.3 F-<80 mg/L, NH4+-N <25 mg/L, pH=9-10, CODcr <100 mg/L 8 Exhaust gas washing wastewater 7.5 NH4+-N <6 mg/L, TP<3 mg/L, SS<80 mg/L, pH=9-10, CODcr <100 mg/L 9 Mixed wastewater derived from washing, up-flow regeneration and boiler 67.7 NH4+-N <6 mg/L, TP<3 mg/L, SS<80 mg/L, pH=3-10, CODcr =100-200 mgL 10 Domestic sewage 30 NH4+-N <26 mg/L, TP<3 mg/L, SS<80 mg/L, pH=6-9, CODcr =300-400 mg/L According to the data shown in Table 1, the discharged flow rate of the compositive wastewater
The treatment methods of chromium wastewater include mainly chemical reduction, electroanalysis, ion exchange, activated carbon adsorption and evaporation concentration and so on.
The chemical reduction is generally used at home and abroad, which was also employed as the main treatment technology for the conversion of Cr6+ to Cr3+.
Online since: May 2012
Authors: Kun Kun You, Jian Xing Ren, Xian Ping Zeng, Xiao Cheng Ma, Jian Tao Liu
Research data show that if not to strengthen the management of nitrogen oxides in flue gas, the amount of nitrogen oxides and the proportion in atmospheric pollutants will rise and may replace the sulfur dioxide becoming the main pollution.
(In Chinese) [3] Shiguo Wang, Xiaodong Huang: The Development of Catalysts for Selective Catalytic Reduction of NOX in Flue Gas[J], China Chemicals, 5, 55-60, (2009).
[10] J H Li, J M Hao, L X Fu, et a1: The activity and characterization of sol-gel Sn/Al2O3 catalyst for selective catalytic reduction of NOX in the presence of oxygen[J], Catal Today, 90, 215-221, (2004).
Online since: October 2007
Authors: Won Yong Kim, H.J. Bang, Tae Yeub Ra, Han Sol Kim, Young Gyu Yoo
Some of samples were cold rolled to obtain a 2.0mm thickness sheet (a total reduction of 85%).
From the pole figure data obtained, the orientation distribution function (ODF) was computed using the formulation of Bunge [2].
Fig. 3 shows φ2=0° section and φ2=45° section of the ODFs of β phase for both the specimens with cold rolling reduction of 85% (a, c) and with recrystallization heat treatment at 1123K for 3.6ks (b, d) in Ti-26Nb-0.5Si (a, b) and Ti-26Nb-1.0Si (c, d) alloys, respectively.
Online since: August 2013
Authors: Lin Cong, Wen Long Li, Jing Chao Lei, Ru Bin Li
Development of low permeability oil fields has the following characteristics: Actuating pressure increases with the reduction of the permeability, extraction reduces with the reduction of the permeability; it has natural fracture that will open under certain pressure, which aggravates geological heterogeneity; reservoir hydrodynamic connectedness is low, the range of single well controls leaking is small [1].
With the seismic and well logging data, carry out the gradual multi-parameter and united reflect and predict the reservoir distribution and the extent of fractures
Online since: September 2008
Authors: Michael J. O'Loughlin, Valeri F. Tsvetkov, Adrian R. Powell, Jim Richmond, Q. Jon Zhang, Michael J. Paisley, Joseph J. Sumakeris, Brett A. Hull, A. Hefner, Angel Rivera
The histogram data are divided by the type of substrate on which the 10 A, 10 kV JBS diodes were fabricated and consist of 89 diodes fabricated on six different standard 4H-SiC substrates and 276 diodes fabricated on twelve different low 1C 4H-SiC substrates.
When employed in a high voltage inverter application running at 125°C, the reduction in Qrr from 4.0 µC to 0.8 µC by replacing a 20 A, 10 kV PiN diode with a 20 A, 10 kV JBS diode represents an 80% reduction in the power dissipation incurred by the diode during the turn-off transient, enabling high voltage inverter modules that can operate at frequencies up to 20 kHz.
Online since: October 2006
Authors: Vittoria Contini, L. Giorgi, Th. Dikonimos Makris, Elena Salernitano, Nicola Lisi, R. Giorgi
The removal of the undesired carbonaceous phases is usually achieved by centrifugation, filtration, oxidation (both in liquid and gas phase) or reduction treatments [7,9-11].
Moreover metallic Fe and Fe3C are also present, as result of the total reduction of the Fe 3+ ions present in the catalyst solid 2θ (deg) 20 30 40 50 60 Diffracted intensity (a.u.)
These results are consistent with literature data concerning similar studies [20-23].
Online since: August 2009
Authors: Nam Hun Kim, Il Sik Shin, Jeong Woo Park
Among functions required for fuel injection systems of ship engines, post injection for use of NOx catalyst, ramp for reduction in formation of nitrogen oxides, and boot type injection are methods of resolving such environmental problems.
Demand for common rail system is increasing as an alternative for reduction of emission gases in relation to environmental problems.
Central processing unit receives spindle current signals and RPM signals to monitor the status of drill, and it also receives the signal line of tilt sensor module to obtain data such as drill header angle.
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