中国科学院机构知识库网格系统: 检索

Interactions between genetic variants and environmental risk factors are associated with the severity of pelvic organ prolapse 期刊论文 OAI收割
MENOPAUSE-THE JOURNAL OF THE NORTH AMERICAN MENOPAUSE SOCIETY, 2023, 卷号: 30, 期号: 6, 页码: 621-628
作者: Li, Lei; Zhao, Guangyi; Wu, Jie; Pang, Haiyu; Zhang, Tianli

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收藏 | 浏览/下载：15/0 | 提交时间：2023/10/09

Age Genexenvironment interaction Maximum birth weight Pelvic organ prolapse Single-nucleotide polymorphism

An efficient local search algorithm for solving maximum edge weight clique problem in large graphs 期刊论文 OAI收割
JOURNAL OF COMBINATORIAL OPTIMIZATION, 2020, 页码: 22
作者: Chu, Yi; Liu, Boxiao; Cai, Shaowei; Luo, Chuan; You, Haihang

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收藏 | 浏览/下载：33/0 | 提交时间：2020/12/10

Graph reduction Maximum edge weight clique problem Stochastic local search

Soil water and root distribution of apple tree (Malus pumila Mill) stands in relation to stand age and rainwater collection and infiltration system (RWCI) in a hilly region of the Loess Plateau, China 期刊论文 OAI收割
CATENA, 2018, 卷号: 170, 页码: 324-334
作者: Zhao, XN (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China.; Xiaolin Song; Xiaodong Gao; Miles Dyck; Wei Zhang

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收藏 | 浏览/下载：62/0 | 提交时间：2018/09/25

Apple Tree Dry Root Weight Density Maximum Rooting Depth Soil Moisture Depletion Stand Age

Fast vanishing point detection method based on road border region estimation 期刊论文 OAI收割
IET Image Processing, 2018, 卷号: 12, 期号: 3, 页码: 361-373
作者: Hou XK(侯续奎); Wang ED(王恩德); Li Y(李勇); Sun AA(孙安安); Zhu YL(朱亚龙)

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收藏 | 浏览/下载：24/0 | 提交时间：2018/12/24

edge detection roads object detection fast vanishing point detection method road border region estimation vanishing point estimation method line-soft-voting maximum weight

Effects of drip irrigation on deep root distribution, rooting depth, and soil water profile of jujube in a semiarid region 期刊论文 OAI收割
PLANT AND SOIL, 2013, 卷号: 373, 期号: 1-2, 页码: 995-1006
作者: Ma, Li-hui; Liu, Xiao-li; Wang, You-ke; Wu, Pu-te

收藏 | 浏览/下载：20/0 | 提交时间：2016/01/06

Artificial economic forest Fine root dry weight density Jujube plantation Maximum rooting depth Soil water depletion Stand age

Weighted data fusion algorithm in the application of visual measurement network system (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Mechatronics and Control Engineering, ICMCE 2012, November 29, 2012 - November 30, 2012, Guangzhou, China
作者: Zhang Y.-c.; Zhou J.

收藏 | 浏览/下载：24/0 | 提交时间：2013/03/25

For the problem on the deviation of actual measurement values between different network positions of visual measurement network system so present the weighted data fusion algorithm. To distribute the weight coefficients according to the stability of eigenvector and fuse the coordinates finally get the ultimate expression of fusion estimate. The experiment results present the maximum absolute tolerance of the fusion results is 0.039mm via the weighted data fusion algorithm the maximum one via traditional data fusion algorithm of the center of point set is 0.056mm Repeatedly measure 50 times compared with the traditional algorithm proposed weighted data fusion algorithm has much better precision and better stability. (2013) Trans Tech Publications Switzerland.

Study on ultra-light secondary baffle for coaxial two-mirror telescope (EI CONFERENCE) 会议论文 OAI收割
2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China
作者: Zhang L.; Zhang L.

收藏 | 浏览/下载：61/0 | 提交时间：2013/03/25

The coaxial two-mirror telescope consists of two mirrors facing each other. Classical two-mirror arrangements are Gregorian and Cassegrain. These systems are usually applied to space telescopes and often have optical baffles to prevent stray light from entering the focal plane. The optical baffles consist of concentric rings suspended between the secondary and the primary mirror. The secondary baffle for a large two-mirror optical system is designed and analyzed in this paper. According to mission of a telescope the structure should have high stiffness and high reliability and light weight. Compared with invar aluminum alloy and titanium alloy carbon fiber composite is currently the best material in terms of weight-to-strength ratio. It also has advantages of high temperature tolerance and low thermal expansion. So carbon fiber composite is chosen as material to meet requirements of the coaxial telescope. In this paper optimization method based on finite element analysis (FEA) is used for design the secondary baffle. Minimum weight of the baffle is chosen as an objective function. Thicknesses of former tube and vanes are chosen as variables. Analysis results show that the designed secondary baffle has maximum diameter of 180mm total length of 120mm and weighs 142g. And its fundamental frequency reaches 651Hz. Therefore the baffle has many advantages such as ultra-light weight high stiffness and dimensional stability etc. The optimization method and the baffle design can be helpful to other coaxial telescopes such as Cassegrain Gregorian and their subdivisions. 2012 IEEE.

Study of horizontal shafting with spherical four-way structure (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
作者: Yang L.; Yang L.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

Altazimuth photoelectric theodolite level shaft U-type and T-type structure but with the expanding field of applications of photoelectric theodolite the horizontal shaft structure occur great changes. For example in the marine environment shipboard conditions the instrument has a waterproof corrosion-resistant easy maintenance and other functions while carrier-based optoelectronic devices from a single visible television configure the development of integrated infrared system and ranging system as one of the single-station measurement system due to the spherical structure has sufficient internal space exactly adapted to this need. In this paper the horizontal axis of a spherical four-way structure. From aspects of the spherical four-way split in the form and shafting design and finite element analysis of the detailed design. A spherical four-way horizontal axis system diameter 550mm weight 19kg sphere in the 40kg load the maximum deformation of 3.3m fully meet the requirements. The shaft of the structure of the shaking is less than 2 arc seconds the vibration test the re-examination instrument accuracy change is less than 1 arc seconds. Verify that the structure is stable and reliable. 2012 IEEE.

基于动态项集计数的加权频繁项集算法 期刊论文 OAI收割
Computer Engineering, 2012, 卷号: 38, 期号: 3, 页码: 31-33
秦丽君; 罗雄飞

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收藏 | 浏览/下载：15/0 | 提交时间：2012/11/12

data mining weighted frequent itemset mining dynamic itemset counting weighted support degree weighted trie tree downward closure property maximum weight

Adaptive deformation estimation of moving target by weight image analysis (EI CONFERENCE) 会议论文 OAI收割
2010 2nd International Conference on Future Computer and Communication, ICFCC 2010, May 21, 2010 - May 24, 2010, Wuhan, China
Bai X.-G.; Dai M.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

An algorithm based on weight image analysis is proposed for adaptive deformation estimation of moving target in mean-shift tracking method. At the first we get the weight image from the target candidate region. Then we analyze the differences between the object and background. According to that the area estimation of the target can be converted into the image segmentation task. To realize the adaptive segmentation and estimation we define the threshold as the maximum variance between object and background. Combining the estimated area and covariance matrix we can estimate the width height and orientation of the object. The experimental results on three representative video sequences validate its robustness to the deformable estimation of the targets. 2010 IEEE.