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Online since: February 2012
Authors: Jun Liang He, Dao Fang Chang, Zhu Hua Jiang, Xiao Na Hu
l The cost when the ship stopped in the berthing
(15)
Where: G ——Average amount of container ship carrier (TEU), According to various to port ship weighted average proportion;
fd ——The actual rate of loading and unloading container ships, and is based on statistical data ;
el ——Average each shore crane loading / unloading time required for a box(hour/TEU);
f1 ——Working day influence coefficient, f1=365/ Berths working day of year;
dt ——Terminal operating hours per day;
at ——The average time for each ship auxiliary operations(hour)
f ——Interference factor,
λ——Average number of ships to reach daily
Average number of ships to reach daily λ as:
(16)
Using the following formula can be calculated daily cost of Cs when the ship stopped in the park after obtaining the average stopped time T of the ship berthing
Application of Al to AGV control-agent control of AGVs[J].
Application of Al to AGV control-agent control of AGVs[J].
Online since: December 2013
Authors: Yao Feng, Wei Guo
Health risk assessment
In this study, the health risk assessment referred to the research by Hu et al. (2011)[8], and the assessment model derived from USEPA applied to estimate the carcinogenic and non-carcinogenic risks for adults and children consuming the lake water as their water source.
El Sayed: Mar.
El Sayed: Mar.
Online since: April 2011
Authors: Jie Zhang, Yu Ming Bo, Chang Bin Ye
连词
1. suppose
翻译以下任意网站
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Proof: Choose the Lyapunov Function , where P is a positive definite symmetric matrix, then
(13)
is equivalent to
(14)
According to Schur Complementary Lemma, we can get
(15)
Note that there are and in the above equation, it should be translated into linear matrix inequality, so that we can solved it directly with LMI toolbox.
[4] Yong Bao, Qiu-qiu Dai and Ying-liu Cui, et al.: Fault Detection Based on Robust States Observer on Networked Control Systems, submitted to International Conference on Control and Automation, Budapest, Hungary IEEE (2005), p.1237-p.1241
[4] Yong Bao, Qiu-qiu Dai and Ying-liu Cui, et al.: Fault Detection Based on Robust States Observer on Networked Control Systems, submitted to International Conference on Control and Automation, Budapest, Hungary IEEE (2005), p.1237-p.1241
Online since: April 2016
Authors: Tadeusz Łagoda, Andrzej Kurek, Anna Kulesa, Krzysztof Kluger, Henryk Achtelik
What is more, author’s proposal (8) is shaped like a letter ‘S’ which is sometimes advised for stress-life models (Kurek et al., 2015).
[15] Nieslony A., Kurek A., EL Dsoki Ch., Kaufmann H. (2012), A Study of Compatibility Between two ical Fatigue Curve Models based on Some Selected Structural Materials, International Journal of Fatigue, Vol. 39, 88-94
[15] Nieslony A., Kurek A., EL Dsoki Ch., Kaufmann H. (2012), A Study of Compatibility Between two ical Fatigue Curve Models based on Some Selected Structural Materials, International Journal of Fatigue, Vol. 39, 88-94
Online since: December 2007
Authors: Ying Xue Yao, W.Z. Xie, Y. Lu
It is seen that preload affects natural frequency obviously, and the critical
rotation speed will go up if gaining preload.
0
1000
2000
3000
4000
5000
6000 50 150 250 350
Axi al pr el oad( N)
Na t u r a l
Fr equency( Hz)
First order
Second order
Third order
Fourth order
Fig. 6 Variation of low order natural frequency along with the variation of preload
Table2 Variation of low order natural frequency along with the variation of preload (50~400N)
order first-order(Hz) second-order(Hz) third-order(Hz) fourth-order(Hz)
variation range
of frequency
707~863 1492~1836 4103~4528 5404~5748
Conclusions
In this paper, the FEM model of motorized spindle is set up to research on its dynamic characteristics,
which is effected by the axial preload on the natural frequency, the motorized spindle's natural
frequencies and corresponding vibration shapes, centrifugal forces and gyroscopic moments on the
motorized spindle shaft.