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长春光学精密机械与物... [4]
力学研究所 [2]
水生生物研究所 [1]
武汉物理与数学研究所 [1]
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OAI收割 [8]
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会议论文 [7]
期刊论文 [1]
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2019 [1]
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Sex differences in resting-state cerebral activity alterations in internet gaming disorder
期刊论文
OAI收割
BRAIN IMAGING AND BEHAVIOR, 2019, 卷号: 13, 期号: 5, 页码: 1406-1417
作者:
Sun, Yawen
;
Wang, Yao
;
Han, Xu
;
Jiang, Wenqing
;
Ding, Weina
  |  
收藏
  |  
浏览/下载:90/0
  |  
提交时间:2019/12/06
Resting-state functional magnetic resonance imaging
Internet gaming disorder
Sex differences
Amplitude of low-frequency fluctuation
Functional connectivity
Ground experiments on a liquid bridge facility for TG-2 space laboratory
会议论文
OAI收割
65th International Astronautical Congress 2014: Our World Needs Space, IAC 2014, Toronto, ON, Canada, September 29, 2014 - October 3, 2014
作者:
Duan L(段俐)
;
Kang Q(康琦)
收藏
  |  
浏览/下载:51/0
  |  
提交时间:2017/05/27
Convection modes
Critical temperature difference
Ground experiments
Oscillation frequency
Space experiments
Space laboratory
Surface deformation
Temperature differences
Dynamic optimization of valveless micropump (EI CONFERENCE)
会议论文
OAI收割
2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11, June 5, 2011 - June 9, 2011, Beijing, China
Deng Y. B.
;
Wu Y. H.
;
Xuan M.
;
Korvink J. G.
;
Liu Z. Y.
收藏
  |  
浏览/下载:20/0
  |  
提交时间:2013/03/25
For the first time
this paper reports on an effective topology optimization method to improve the output net flux for valveless micropumps. The micropump considered here is actuated by the vibration of membranes and can generate a net flow along the optimized rigid fluidic channel. The detailed layout of the micropump channel is optimized with respect to a number of factors which influence the output net flux of liquid
such as the number of actuation elements
the positions of actuation elements
the driving phase differences and the driving frequency. Accordingly
the layouts of several novel valveless micropumps are presented. 2011 IEEE.
Correction method for detection of the frequencies of railway fsk signals (EI CONFERENCE)
会议论文
OAI收割
2008 9th International Conference on Signal Processing, ICSP 2008, October 26, 2008 - October 29, 2008, Beijing, China
作者:
Yu J.
收藏
  |  
浏览/下载:63/0
  |  
提交时间:2013/03/25
In order to acquire the information of railway binary frequency-shift keying signals
which include upper/down side frequencies and base low-frequency with high-accuracy
a novel frequency detection algorithm for France UM-71 system is proposed. Combining fast Fourier transform with the ratio correction method
the carrier frequency and the base frequency are obtained. Furthermore
the hardware consumption has been decreased. And it possesses the advantage of simple algorithm and fast operation speed. Comparing with the detection of the base frequency
the upper/down side frequency of railway signal is more difficult. Based on spectrum analysis and the spectrum correction
a new method
which adopts the sliding window
is put forward in this paper. The absolute differences between the upper side frequencies and the down side frequencies obtained are regarded as the criterion for judgment. Then the set of data
in which the maximum absolute value is
is to be the result of the upper/down side frequency. Because the sliding window will go through every stage when the upper/down side frequency changes
therefore
it is not sensitive enough to the position of data which need to be transformed. Using the method mentioned above
the experiment results show that the accuracy requirement of the side frequency is satisfied well. 2008 IEEE.
Arc fault signatures detection on aircraft wiring system (EI CONFERENCE)
会议论文
OAI收割
6th World Congress on Intelligent Control and Automation, WCICA 2006, June 21, 2006 - June 23, 2006, Dalian, China
Hongkun Z.
;
Tao C.
;
Wenjun L.
收藏
  |  
浏览/下载:22/0
  |  
提交时间:2013/03/25
In this paper an arc fault detection method Is proposed based on characteristics of the fault current of an electric arc. A localized signal processing method Is developed using wavelet analysis to decompose the differential current signal Into a series of wavelet components
each of which Is a time-domain signal that covers a specific frequency band. Thus
more distinctive signal features that represent arc faults and other fault transient phenomena are extracted. As a result
by quantifying the extracted features
an arc faults are distinguished from phenomena similar to arc and other fault transients using the differences In the quantified features. Simulation studies have demonstrated that the proposed method Is reliable and simple. 2006 IEEE.
Study of removing striping noise in CCD image (EI CONFERENCE)
会议论文
OAI收割
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
作者:
Liu H.
;
Liu H.
;
Liu H.
收藏
  |  
浏览/下载:16/0
  |  
提交时间:2013/03/25
Striping noise is the common system noise during formation of image using linear array CCD and has the character of periodicity
directivity and banding distributing. It can be caused by errors in internal calibration devices
or by slight gain/offset differences among the elements that conform the array of detectors. Striping noise covers up useful information in CCD image and brings adverse effect to image interpretation. On the basis of analyzing wavelet decomposed coefficient
the regularities of distribution about striping noise in wavelet coefficient is found
thereby the method of wavelet threshold selection which is suitable to striping noise distribution is put forward. According to Donoho's method about denoising using wavelet
the image including striping noise is processed. Comparing the power spectrum of processed image with the one of original image polluted by striping noise in frequency field
we find pulse brought by striping noise is removed and the goal which reserves image details and reduces stripes is achieved.
Numerical analysis of two distinct types of vortex dislocation in wake-type flows with different spanwise nonuniformities
会议论文
OAI收割
3rd M.I.T. Conference on Computational Fluid and Solid Mechanics, Boston, MA, United states, June 14, 2005 - June 17, 2005
作者:
Ling GC(凌国灿)
;
Niu JY(牛家玉)
收藏
  |  
浏览/下载:27/0
  |  
提交时间:2017/06/01
Flow quantities
Frequency differences
Local irregularities
Non-uniformities
Phase difference
Proper orthogonal decomposition method
Transition behavior
Vortex dislocation
Vortex dislocations
Wake flows
Wake-type flow
Quantitative analysis on euglenoid distribution in seven regions of China
会议论文
OAI收割
Workshop on Biogeography of Freshwater Algae, at the 5th International Phycological Congress, QINGDAO, PEOPLES R CHINA, JUN, 1994
Shi, ZX
收藏
  |  
浏览/下载:218/64
  |  
提交时间:2010/11/11
euglenoids
quantitative relationships
frequency distributions
regional differences
relationship of 'species-abundance'
progressive changes