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北京大学 [4]
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Influence of Geometric Parameters of Tiny Blades on the Shroud of a Centrifugal Pump on the Cavitation Suppression Effect
期刊论文
Frontiers in Energy Research, 2022, 卷号: 10
作者:
Zhao, Weiguo
;
Zhou, Zhongliang
收藏
  |  
浏览/下载:25/0
  |  
提交时间:2022/06/20
Cavitation
Centrifugal pumps
Kinetic energy
Kinetics
Numerical models
Turbulence models
Cavitation performance
Cavitation suppression
Geometric parameter
Low specific-speed
Numerical simulation
Radial position
Suppression effects
The shroud of the impell
Tiny blade
Turbulent kinetic energy
High-Frequency Motions in the Southeastern South China Sea During Winter-Spring 2018/2019
期刊论文
FRONTIERS IN MARINE SCIENCE, 2021, 卷号: 8, 页码: 12
作者:
Zhang, Zhipeng
;
Xu, Hongzhou
;
Vetter, Philip A.
;
Xie, Qiang
;
Xie, Xiaohui
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  |  
浏览/下载:20/0
  |  
提交时间:2021/10/22
internal tides
near-inertial waves
horizontal kinetic energy
modal decomposition
the southeastern South China Sea
Changes in metal mobility assessed by EDTA kinetic extraction in three polluted soils after repeated phytoremediation using a cadmium/zinc hyperaccumulator
期刊论文
CHEMOSPHERE, 2018, 卷号: 194, 页码: 432-440
作者:
Li, Zhu
;
Wu, Longhua
;
Luo, Yongming
;
Christie, Peter
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  |  
浏览/下载:129/0
  |  
提交时间:2020/07/08
Soil metals
Phytoremediation
The two first-order reactions model
Kinetic extraction
Environmental risk
First Techno-Economic Evaluation of Array Configuration of Self-Balancing Tidal Kinetic Turbines
期刊论文
Renewable Energy, 2018
作者:
S. Barbarelli
;
G. Florio
;
G. Lo Zupone
;
N.M. Scornaienchi
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  |  
浏览/下载:4/0
  |  
提交时间:2019/02/25
Tidal Kinetic Turbines
Floating Stabilizers
Array Configuration
Extension of the Array
Shutting with Accordion Effect
Energy Output
An investigation on the catalytic capability of the modified white mud after activation in transesterification and kinetic calculation
期刊论文
ENERGY, 2015, 卷号: 89, 页码: 982-989
作者:
Niu, Shengli
;
Zhou, Yan
;
Li, Hui
;
Lu, Chunmei
;
Liu, Li
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  |  
浏览/下载:1/0
  |  
提交时间:2019/12/17
Transesterification
Catalyst
The modified white mud
The kinetic
parameter
The effect of various templates on the NH3-SCR activities over Cu/SAPO-34 catalysts
期刊论文
Chemical Engineering Journal, 2014, 卷号: Vol.243, 页码: 159-168
作者:
Yu, T.a
;
Fan, D.a
;
Hao, T.a
;
Wang, J.a
;
Shen, M.a,b
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  |  
浏览/下载:4/0
  |  
提交时间:2019/11/21
Selective catalytic reduction
Cu/SAPO-34
Si islands
Template
The kinetic test
The kinetic and thermodynamic study on the OH-initiated degradation mechanism of polychlorinated dibenzo-p-dioxins
会议论文
作者:
X.Zhang
;
C.X.Zhang
;
L.Y.Kang
;
C.Gong
;
X.M.Sun
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  |  
浏览/下载:4/0
  |  
提交时间:2019/12/31
rate
OH
The kinetic and thermodynamic study on the OH-initiated degradation mechanism of polychlorinated dibenzo-p-dioxins
PCDDs
CVT
CDD
The change in the motions of the Earth and spacecraft launching - a college physics level analysis
期刊论文
2013
Zhang, Gengmin
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  |  
浏览/下载:3/0
  |  
提交时间:2015/11/13
second cosmic velocity
third cosmic velocity
Earth motion
conservation of momentum
conservation of angular momentum
kinetic energy of the Earth
一阶船舶操纵运动模型动态仿真的研究
期刊论文
http://epub.edu.cnki.net/grid2008/brief/detailj.aspx?filename=jmxz200203012&dbcode=CJFQ&dbname=CJFQ2002, 2012, 2012
于军民
;
邵哲平
收藏
  |  
浏览/下载:6/0
  |  
提交时间:2017/06/19
船舶操纵
运动模型
K、T指数
动态仿真
ship maneuvering
model of the motion
index number K、T
kinetic simulation
U661.73
Contact-impact analys with clearance hinge in flexible multi-body system (EI CONFERENCE)
会议论文
2nd Annual Conference on Electrical and Control Engineering, ICECE 2011, September 16, 2011 - September 18, 2011, Yichang, China
Ge M.
;
Jia H.
;
Liu B.
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  |  
浏览/下载:43/0
  |  
提交时间:2013/03/25
Hinge in mechanical systems exist small clearance and contact deformation
After consideration of flexible components
cause the system to the wear and tear
impact force reduced at the clearance
noise
contact time increased
vibration
contact-impact areas expand and clearance also caused disturbance of the rod angular velocity of the linkage. 2011 IEEE.
reliability reduce or even failure[1]. Therefore
the hinge clearance and the impact of flexible components in kinetic models should be considered. In this paper
a nonlinear spring-damper hinge clearance model is considered to establish mechanical system structure of dynamic equations[46]
through a four-bar linkage hinge with multi-clearance rotation of ADAMS dynamic simulation for dynamics simulation study. Simulation results show that hinge clearance and link flexible in Four-link mechanism dynamics have a great impact on performance: connection with the clearance lead to pin holes to produce a series of collisions
and a larger initial impact force
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