中国科学院机构知识库网格系统: 检索

The response of agricultural drought to meteorological drought modulated by air temperature 期刊论文 OAI收割
JOURNAL OF HYDROLOGY, 2024, 卷号: 639, 页码: 13
作者: Wei, Xiaoting; Huang, Shengzhi; Liu, Dong; Li, Jianfeng; Huang, Qiang

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收藏 | 浏览/下载：12/0 | 提交时间：2024/12/30

Huning Associate Editor?. Temperature threshold Agricultural drought Meteorological drought Copula The geographical detector

Corner detection using Gabor filters 期刊论文 OAI收割
iet image processing, 2014, 卷号: 8, 期号: 11, 页码: 639-646
作者: Zhang, Wei-Chuan; Wang, Fu-Ping; Zhu, Lei; Zhou, Zuo-Feng

收藏 | 浏览/下载：53/0 | 提交时间：2015/03/19

edge detection Gabor filters grey systems affine transforms Gabor filter contour-based corner detection magnitude response edge contour shape analysis local curvature maxima points planar curve corresponding grey-variation information Canny edge detector normalised magnitude response magnitude response threshold angle threshold detection accuracy localisation accuracy afflne transform noise-robustness

Study of J/psi -> omega p(p)over-bar at BESIII 期刊论文 OAI收割
PHYSICAL REVIEW D, 2013, 卷号: 87, 期号: 11
作者: BESIII Callaboration

收藏 | 浏览/下载：20/0 | 提交时间：2015/12/02

THRESHOLD ENHANCEMENT DETECTOR DECAYS STATE

Experiment analysis of CO2 laser disturbance on long-wave infrared HgCdTe detector (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China
作者: Wang S.-W.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

Theoretical analysis and experimental study were carried out on the high-power CO2 laser disturbance to long-wave infrared (LWIR) HgCdTe detector in this paper. Based on the practical parameters of experiment the theoretical model of temperature-rise is adopted to calculate the variation of the temperature with the time and the power of laser for laser irradiation on the detector. After that the damage threshold is 110W/cm2. This experimental phenomenon well agrees with the results predicted by the theoretical calculation. The conclusions have a certain reference value for the laser defense of detector. 2011 IEEE. the high-power laser damage mechanism to LWIR detector is discussed and compares with the experimental results of laser irradiation the detector on the distance of 15km. The theoretical and experimental results demonstrate that the interference threshold of the detector is 20.5W/cm 2

Study of a(0)(0)(980) - f(0)(980) mixing 期刊论文 OAI收割
PHYSICAL REVIEW D, 2011, 卷号: 83, 期号: 3
作者: BESIII Callaboration

收藏 | 浏览/下载：21/0 | 提交时间：2015/12/02

COUPLED-CHANNEL ANALYSIS KLOE DETECTOR MESONS DECAY THRESHOLD SEARCH

Study on medical X-ray coherent scatter imaging and processing based digital flat detector (EI CONFERENCE) 会议论文 OAI收割
3rd International Conference on BioMedical Engineering and Informatics, BMEI 2010, October 16, 2010 - October 18, 2010, Yantai, China
作者: Li B.; Zhao J.; Li B.; Li B.; Liu J.

收藏 | 浏览/下载：32/0 | 提交时间：2013/03/25

It is introduced a novel imaging technique for medical diagnostic X-ray coherent scatter in this paper. A set of experimental equipment for X-ray coherent scatter imaging was set up with X-ray digital flat detector and medical diagnostic X-ray source. According to this equipment the scatter images obtained are made of some circles with the same center. It is vital to calculate the energy template to classify the different samples. It is difficult to separate them using the traditional threshold method due to noise and overlapped shadow. In this paper the image was transformed a binary image by using K-Means algorithm and Mathematical Morphology Methods. The effective region was extracted from the binary image inside the orthogonal energy projection space then to calculate the centroid of rings. Consequently the curve of the energy distribution was built. The experiment results show that our method is reasonable and feasible. The technique will have wide foreground of application .Besides the imaging of human bone content it can be used for various imaging of tissue and organs in biology. 2010 IEEE.

The corner detector of teeth image based on the improved SUSAN algorithm (EI CONFERENCE) 会议论文 OAI收割
3rd International Conference on BioMedical Engineering and Informatics, BMEI 2010, October 16, 2010 - October 18, 2010, Yantai, China
作者: Yang L.; Yang L.; Wang X.; Wang X.; Wang X.

收藏 | 浏览/下载：18/0 | 提交时间：2013/03/25

In order to detect the corners of the teeth image secondly last we detected the corners of the image through the improved SUSAN corner detector algorithm. Through lots of experiments and comparing with other corner detector methods which were acquired by oral cavity endoscope we segmented the image by the threshold based on the gray value of the image this method can detect the corners of the teeth image effectively in this paper which can offer some available parameters for the 3D reconstruction of the teeth. 2010 IEEE. we used the improved SUSAN corner detector algorithm. In this method firstly we removed the noise of the image by the morphology open operation and median filtering

The research of corner detector of teeth image based on the curvature scale space corner algorithm (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
作者: Yang L.; Wang X.; Wang X.; Wang X.; Yang L.

收藏 | 浏览/下载：18/0 | 提交时间：2013/03/25

In order to detect the corners of the teeth image secondly thirdly last this method can detects the corners of the teeth image effectively which were acquired by oral cavity endoscope we segmented the image by the threshold based on the gray value of the image we detected the edge of the teeth image by the Canny edge detector we detected the corners by the adaptive threshold curvature scale corner detector. Through lots of experiments and we compare this method to other corner detector methods which offers some available parameters for the 3D reconstruction of the teeth. 2010 IEEE. in this paper we used the CSS algorithm. In this method firstly we removed the noise of the image by the morphology open operation and median filtering

Analysis of laser jamming to satellite-based detector (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, June 17, 2009 - June 19, 2009, Beijing, China
作者: Guo L.-H.; Guo R.-H.; Wang S.-W.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

The reconnaissance satellite communication satellite and navigation satellite used in the military applications have played more and more important role in the advanced technique wars and already become the significant support and aid system for military actions. With the development of all kinds of satellites anti-satellite laser weapons emerge as the times require. The experiments and analyses of laser disturbing CCD (charge coupled detector) in near ground have been studied by many research groups but their results are not suitable to the case that using laser disturbs the satellite-based detector. Because the distance between the satellite-based detector and the ground is very large it is difficult to damage it directly. However the optical receive system of satellite detector has large optical gain so laser disturbing satellite detector is possible. In order to determine its feasibility the theoretical analyses and experimental study are carried out in the paper. Firstly the influence factors of laser disturbing satellite detector are analyzed in detail which including laser power density on the surface of the detector after long distance transmission and laser power density threshold for disturbing etc. These factors are not only induced by the satellite orbit but dependence on the following parameters: laser average power in the ground laser beam quality tracing and aiming precision and atmospheric transmission. A calculation model is developed by considering all factors which then the power density entering into the detector can be calculated. Secondly the laser disturbing experiment is performed by using LD (laser diode) with the wavelength 808 nm disturbing CCD 5 kilometer away which the disturbing threshold value is obtained as 3.5510-4mW/cm2 that coincides with other researcher's results. Finally using the theoretical model the energy density of laser on the photosensitive surface of MSTI-3 satellite detector is estimated as about 100mW/cm2 which is largely exceed the disturbing threshold and therefore verify the feasibility of using this kind of laser disturbing the satellite-based detector. According to the results. using the similar laser power density absolutely saturate the requirements to laser disturbing satellite-based detector. If considering the peak power of pulsed laser even decrease laser average power it is also possible to damage the detector. This result will provide the reliable evidences to evaluate the effect of laser disturbing satellite-based detector. 2009 SPIE.

Study of J/psi decaying into omega p(p)over-bar 期刊论文 OAI收割
EUROPEAN PHYSICAL JOURNAL C, 2008, 卷号: 53, 期号: 1, 页码: 15-20
作者: BES Callaboration

收藏 | 浏览/下载：34/0 | 提交时间：2015/12/02

NEAR-THRESHOLD ENHANCEMENT HADRON-NUCLEUS COLLISIONS DETECTOR SIMULATION BES P(P)OVER-BAR PHYSICS STATE