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Online since: October 2011
Authors: Bin Zhou, Dun Sheng Niu, Qi Wen Wang
Table 2 Geological Data
Geological Stratum
Geological Sequence
Soil / Rock Type
Top Level of Layer (m)
Fill
1
Fill
/
Alluvium and Diluvium in Holocene, Quaternary
2
Silty Clay
5.93~2.83
3
Mucky Silty Clay
3.98~1.50
4
Silty Sand
6.63~0.50
Alluvium and Diluvium in Upper Pleistocence, Quaternary
5
Silty Clay
5.99~ -0.47
6
Gravelly Sand
4.03~ -4.53
Colluvium, Quaternary
7
Gravelly Silty Clay
-1.30~ -9.35
Coarse Grain Granite, Phase of Yanshan
8
Completely Decomposed Granite
-4.22~ -17.15
9
Highly Decomposed Granite
-7.17~ -22.32
10
Moderately Decomposed Granite
-19.01~ -37.20
11
Slightly Decomposed Granite
-19.41~ -39.90
Earthquake Action.
Fig. 8 MIDAS model Fig. 9 Key mode shapes (MIDAS) Table 5 Analysis results from level 1 earthquake Program MIDAS ETABS Base Floor Ground floor Ground floor Floor slab Flexible diaphragm Flexible diaphragm Period reduction factor 0.9 0.9 Total mass (ton) 291150 Mass over floor area (ton/㎡) 1.7 Periods (s) T1=5.12 T2=4.94 T3=3.47 T1= 5.07 T2= 4.90 T3=3.67 Ratio of 1st rotational period over 1st translational period 0.68 0.72 Seismic amplification factor 1.0 1.0 Total number of mode shapes 62 56 Base shear under spectrum (MN) X-direction 32.4 33 Y-direction 31.3 32.4 Overturning moment under spectrum (MNm) X-direction 3532 4350 Y-direction 3440 3716 Base shear under wind (MN) X-direction 35.7 37.8 Y-direction 39.8 41.6 Overturning moment under wind (MNm) X-direction 5099 5213 Y-direction 5301 5378 Cumulative mass ratio X:99% Y:99% X:98% Y:98% Max. inter-storey drift X-direction wind 1/885 1/922 Y-direction wind 1/789 1/800 X-direction seismic 1/1218 1/1154
Fig. 8 MIDAS model Fig. 9 Key mode shapes (MIDAS) Table 5 Analysis results from level 1 earthquake Program MIDAS ETABS Base Floor Ground floor Ground floor Floor slab Flexible diaphragm Flexible diaphragm Period reduction factor 0.9 0.9 Total mass (ton) 291150 Mass over floor area (ton/㎡) 1.7 Periods (s) T1=5.12 T2=4.94 T3=3.47 T1= 5.07 T2= 4.90 T3=3.67 Ratio of 1st rotational period over 1st translational period 0.68 0.72 Seismic amplification factor 1.0 1.0 Total number of mode shapes 62 56 Base shear under spectrum (MN) X-direction 32.4 33 Y-direction 31.3 32.4 Overturning moment under spectrum (MNm) X-direction 3532 4350 Y-direction 3440 3716 Base shear under wind (MN) X-direction 35.7 37.8 Y-direction 39.8 41.6 Overturning moment under wind (MNm) X-direction 5099 5213 Y-direction 5301 5378 Cumulative mass ratio X:99% Y:99% X:98% Y:98% Max. inter-storey drift X-direction wind 1/885 1/922 Y-direction wind 1/789 1/800 X-direction seismic 1/1218 1/1154
Online since: November 2012
Authors: Jin Hu
The calculation results of the joint operation power station peaking and single lock show that:The scheme utilizes the peak value superposition of the two waves in the approach channel to achieve the purpose of attenuation and peak value reduction.In this operation pattern,the wave height,flow velocity and hydraulic gradient of the approach channel,connection section and entrance area meet the navigation standard,which indicates that this optimization is feasible.
Pumped storage power station vertical shaft type an outlet 3d data simulation [J].
Pumped storage power station vertical shaft type an outlet 3d data simulation [J].
Online since: September 2014
Authors: Jiang Zeng, Li Peng Huang
To lower switching loss, the corresponding switching frequency should be adjusted to 1+y and 1-y respectively( the whole frequency is fixed) , the total switching loss can be given by:
(3)
The relation between adjustment range for optimal switching frequency and current fluctuation range is complicated, but in practical application, using numerical calculation and data fitting, a simple formula below turns out:
(4)
Linear fitting is precise enough to formulate the proportional relation between them, close to 0.3832, as long as current fluctuation is not too high.
At the same time, it makes appropriate arrangements for switching times based on the size of the three-phase current and makes split phase hysteresis adjustment, so as to achieve a further reduction of switching losses.
At the same time, it makes appropriate arrangements for switching times based on the size of the three-phase current and makes split phase hysteresis adjustment, so as to achieve a further reduction of switching losses.
Online since: December 2014
Authors: Hao Bo Hou, Min Zhou, Wei Xin Wang, Can Hua Li, Xu Lin Zhou
Its effects of the drainage, sliding resistance, sound absorption, noise reduction and water penetration can improve the ground surface ecological cycles, and they are helpful to enhance the driving traffic safety, protect the living environment and solve the negative influence caused by the large-scope modernized city construction.
Auto Marshall apparatus used in this experiment has a control device to record the load-displacement curves, measure the vertical variants of the loads and specimens display and store experimental data.
Auto Marshall apparatus used in this experiment has a control device to record the load-displacement curves, measure the vertical variants of the loads and specimens display and store experimental data.
Online since: May 2013
Authors: S. Benbelaid, B. Bezzazi, A. Bezazi
In shear and transverse direction, a first approximation of the damage development, which corresponds to a linear law with respect to the square root of the equivalent associated force Y, shows a good fit with the experimental data:
(7)
if < else d22=1 (8)
Where the constant parameters and correspond to the threshold and the critical values of the development of (which varies from 0 to 1) and the coefficients c stands for the ratio between the transverse damage and the shear damage, generally it equals 1. is the critical parameter, which defines the ultimate force corresponding to transverse failure.
If we assume a = 1.1, Equations (11) and (12) give good predictions of the stiffness reduction caused by matrix cracking in CFRP, GFRP and KFRP laminates [42].
If we assume a = 1.1, Equations (11) and (12) give good predictions of the stiffness reduction caused by matrix cracking in CFRP, GFRP and KFRP laminates [42].
Online since: March 2020
Authors: Tian Qi Wang, Zhan Feng Liu, Xiao Lan Han, Yuan Ying Qiu
The measured data are listed in Table 4.
Insofar as, in the process of cutting, the wear rates of the tool tip and cutting edge are different, resulting in the increase of tool tip radius and the chip thickness reduction.
Insofar as, in the process of cutting, the wear rates of the tool tip and cutting edge are different, resulting in the increase of tool tip radius and the chip thickness reduction.
Online since: June 2021
Authors: Feyisayo Victoria Adams, Kebone Revival Mofokeng, Muhammad Falalu Yahaya, Joshua Osuigwe Madu, Florence Nkiruka Chukwudi, Samuel Ojo
From Table 3, the turbidity of the raw water was 137 NTU but it improved after filtration using different candle filters, different level of reduction in the turbidity were achieved.
The MS spectra of these samples (data not shown) indicated that there was a total removal of some hydrocarbons (dodecanoic acid, hexadecanoic acid).
The MS spectra of these samples (data not shown) indicated that there was a total removal of some hydrocarbons (dodecanoic acid, hexadecanoic acid).
Online since: January 2021
Authors: Vinay Agrawal, Ravindra Nagar, Sanjay Mundra
However, replacement of 50% & 100% sandstone cutting waste in concrete shows the increase in voids along with high porosity and formation of ettringite resulting in weak Interfacial Transition Zone (ITZ) and due to this it was found noticeable reduction of compressive strength.
Acknowledgements Research data compiled in this paper is the outcome of the research publications & literature review.
Acknowledgements Research data compiled in this paper is the outcome of the research publications & literature review.
Online since: January 2022
Authors: Viranjay Srivastava, Naveenbalaji Gowthaman
Hence V(y) can be expressed as:
Vy=VdsL .y
(3)
After substituting the equations (1) and (3) in (2) and also subsequent reduction equation (4) is derived [2]:
∂2∂x2ψx=qεsini .expψx-V(y)Vt
(4)
where V(y) may be expressed as V.
Extensive Simulation Model There are simulators such as PADRE, PROPHET, BICEPS, etc. that provide efficient data results.
Extensive Simulation Model There are simulators such as PADRE, PROPHET, BICEPS, etc. that provide efficient data results.
Computational Analysis of Laser Cladding of Preset MCrAlY Coating Based on ANSYS I-Temperature Field
Online since: February 2021
Authors: Dong Sheng Wang, Pei Pei Zhang, Li Ye Yue, Hao Yang
Given the current technological conditions, it is difficult to get accurate data of temperature field through real-time measurement in the process of laser cladding.
With the increase of laser scanning speed, the maximum temperatures on sample surface and interface decline, accompanied with reductions in depth of the molten pool and the interface-metallurgical bonding width.
With the increase of laser scanning speed, the maximum temperatures on sample surface and interface decline, accompanied with reductions in depth of the molten pool and the interface-metallurgical bonding width.