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Intentional islanding method based on community detection for distribution networks
期刊论文
IET GENERATION TRANSMISSION & DISTRIBUTION, 2019, 卷号: Vol.13 No.1, 页码: 30-36
作者:
Zhang, HY
;
Peng, MF
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  |  
浏览/下载:5/0
  |  
提交时间:2019/12/13
power distribution faults
complex networks
network theory (graphs)
intentional islanding method
community detection
distribution networks
complex network theory
islanding problem
electrical edge betweenness
edge betweenness strength
electrical characteristics
topological features
actual power lines
Girvan-Newman algorithm
community structure detection
modularity value
function Q
coherent generator groups
self-sustainable islands
stable operation constraints
standard IEEE 118-bus system
车损险保险价值之厘定
学位论文
2016, 2016
谢洁楠
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  |  
浏览/下载:3/0
  |  
提交时间:2017/06/20
车损险
保险价值
实际价值
Vehicle Damage Insurance
Insured Value
Actual Value
我国房地产上市公司资本结构变化特征研究——基于最优资本结构的视角
期刊论文
2016, 2016
张红
;
杨飞
;
张志峰
;
ZHANG Hong
;
YANG Fei
;
ZHANG Zhifeng
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  |  
浏览/下载:2/0
“营改增”对交通运输业企业税负水平的影响 ——基于上市公司财务数据的分析
学位论文
2015, 2014
梁伟
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  |  
浏览/下载:3/0
  |  
提交时间:2016/02/23
交通运输业
营业税
增值税
实际税负
transportation industry
business tax
value-added tax
the actual tax
商业企业增值税税收筹划研究
学位论文
2013, 2012
蓝文连
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  |  
浏览/下载:2/0
  |  
提交时间:2016/02/14
商业企业
增值税
税收筹划
实际应用
commercial enterprise
value-added tax
tax revenue planning
actual application
Design of motion compensation mechanism of satellite remote sensing camera (EI CONFERENCE)
会议论文
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Gu S.
;
Yan Y.
;
Xu K.
;
Jin G.
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浏览/下载:40/0
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提交时间:2013/03/25
With the development of aerospace remote sensing technology
the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures
the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera
the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera
the compensation method of image motion to space camera is researched. First
the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second
the system adopts 80C31 as controller of drift angle
and adopts stepping motor for actuators
and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced
and it achieve the closed-loop control of the drift angle position. At the last
this paper analyses the transmission precision of the mechanism. Through the experiment
we measured the actual precision of the image motion compensation mechanism
and compared with the theoretical analysis. There are two major contributions in this paper. First
the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism
it will bring adverse effects for the precision and stiffness of mechanism. For this problem
This paper designed a image motion compensation that have some advantages such as small size
light weight at the same time
high precision
stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second
the traditional mechanism control need to corrected
fitting and iterative for the control formula of mechanism. Only in this way
we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting
It also simplify the difficulty of control mathematical model establishment. This paper designed the range of adjusting of image motion compensation mechanism between -5 +5. Based on choosing-5
-4
-3
-2
-1
0
+1
+2
+3
+4
+4 as the expectation value of the imaginary drift angle
we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1. It can meet the system requirements that the precision of the control system is less than 3'
and it can achieve the high-precision image motion compensation. 2011 SPIE.
论花鸟画中的点景
学位论文
2010, 2010
杨艺贞
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浏览/下载:3/0
  |  
提交时间:2016/02/14
点景
画面构成
延续价值
现实意义
Point view
Painting composition
continued value
actual significance
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