机构

• 地理科学与资源研究所 [4]
• 长春光学精密机械与物... [4]
• 植物研究所 [3]
• 数学与系统科学研究院 [1]

采集方式

• OAI收割 [12]

内容类型

• 期刊论文 [8]
• 会议论文 [4]

发表日期

• 2022 [3]
• 2020 [2]
• 2019 [1]
• 2014 [1]
• 2011 [2]
• 2010 [2]
• 更多

学科主题

• Ecology [2]
• Geography,... [1]
• Plant Scie... [1]
• Soil Scien... [1]

筛选

浏览/检索结果: 共12条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Sampling interval-size effects and differential sensitivities of different morphology parameters of rock joint 期刊论文  OAI收割 JOURNAL OF STRUCTURAL GEOLOGY, 2022, 卷号: 155, 页码: 14 作者:  Xu, Xunhui;  Bao, Han;  Lan, Hengxing;  Liu, Changqing;  Xu, Jiangbo   |  收藏  |  浏览/下载：30/0  |  提交时间：2022/09/21 Rock joint  Morphology parameters  Sampling interval effect  Sampling size effect  Sensitivity   Sampling interval-size effects and differential sensitivities of different morphology parameters of rock joint 期刊论文  OAI收割 JOURNAL OF STRUCTURAL GEOLOGY, 2022, 卷号: 155, 页码: 14 作者:  Xu, Xunhui;  Bao, Han;  Lan, Hengxing;  Liu, Changqing;  Xu, Jiangbo   |  收藏  |  浏览/下载：19/0  |  提交时间：2022/09/21 Rock joint  Morphology parameters  Sampling interval effect  Sampling size effect  Sensitivity   Scale-dependent species-area relationship: Niche-based versus stochastic processes in a typical subtropical forest 期刊论文  OAI收割 JOURNAL OF ECOLOGY, 2022, 卷号: 110, 期号: 8, 页码: 1883-1895 作者:  Ren, Haibao;  Svenning, Jens-Christian;  Mi, Xiangcheng;  Lutz, James A.;  Zhou, Jinxing   |  收藏  |  浏览/下载：15/0  |  提交时间：2024/03/07 community assembly  Gutianshan forest dynamics plot  niche versus neutrality  passive sampling  power-law model  resource availability and heterogeneity  spatial effect  variance partitioning   Geometrical heterogeneity of the joint roughness coefficient revealed by 3D laser scanning 期刊论文  OAI收割 ENGINEERING GEOLOGY, 2020, 卷号: 265, 页码: 9 作者:  Bao, Han;  Zhang, Guobiao;  Lan, Hengxing   |  收藏  |  浏览/下载：25/0  |  提交时间：2020/05/19 Joint roughness coefficient  Sampling effect  Anisotropy  Log-normal distribution   Geometrical heterogeneity of the joint roughness coefficient revealed by 3D laser scanning 期刊论文  OAI收割 ENGINEERING GEOLOGY, 2020, 卷号: 265, 页码: 9 作者:  Bao, Han;  Zhang, Guobiao;  Lan, Hengxing;  Yan, Changgen;  Xu, Jiangbo   |  收藏  |  浏览/下载：20/0  |  提交时间：2020/05/19 Joint roughness coefficient  Sampling effect  Anisotropy  Log-normal distribution   Tree species identity surpasses richness in affecting soil microbial richness and community composition in subtropical forests 期刊论文  OAI收割 SOIL BIOLOGY & BIOCHEMISTRY, 2019, 卷号: 130, 页码: 113-121 作者:  Chen, Liang;  Xiang, Wenhua;  Wu, Huili;  Ouyang, Shuai;  Zhou, Bo   |  收藏  |  浏览/下载：16/0  |  提交时间：2022/01/06 Plant diversity  Bacterial and fungal communities  Sampling effect  High-throughput sequencing  Subtropical forests   Environmental and socio-economic factors shaping the geography of floristic collections in China 期刊论文  OAI收割 GLOBAL ECOLOGY AND BIOGEOGRAPHY, 2014, 卷号: 23, 期号: 11, 页码: 1284-1292 作者:  Yang, Wenjing;  Ma, Keping;  Kreft, Holger   |  收藏  |  浏览/下载：10/0  |  提交时间：2023/03/30 Biodiversity database  botanist effect  collecting effort  geographical sampling bias  specimen collection  vascular plants  Wallacean shortfall   The error analysis of automated biochemical analyzer (EI CONFERENCE) 会议论文  OAI收割 2011 International Conference on Computing, Information and Control, ICCIC 2011, September 17, 2011 - September 18, 2011, Wuhan, China Qinghai C.; Yihui W.; Haiwen L.; Peng H. 收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25 In order to find out the relationships between the four error sources  namely  locating error  optics system fluctuations  sampling error and temperature fluctuations  and the accuracy of the instrument  we analyzed each relationship of them  and found that the effect of locating error is so tiny that it can be ignored  finally established the total error model and the model of the allowed noise of the optics system of the instrument. Analysis and the models may supply a reliable theory evidence for the improvement of the instrument and the designing of similar instruments. 2011 Springer-Verlag.   The angular velocity estimation principal of -- filter based on high sampling rate (EI CONFERENCE) 会议论文  OAI收割 2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China 作者:  Zhang Y. 收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25 In order to get angular velocity of stabilization servo mechanism from angular position sensors  -- filter and its angular velocity transfer function were predigested. Combing with optimum parameters  -- filter based on high sampling rate was established  the effect of and sample rate on filter nature frequency were evaluated. According to the requirements of stabilization platform  the principle of steady and transient tracking filter differential were proved. With the hypothesis of constant acceleration  the frequency characteristics of angular velocity transfer function were analyzed  three-dimensional Kalman filter was simplified  and the filter parameters were designed. The results show that when the spectrum of input signal was lower than 6rad/s  parameters was 0.02  and sampling period were 0.08ms and 0.1ms respectively  the filter can realize differential exactly  when the spectrum was 9rad/s  the precision was no less than 1.1%  the phase leading of angular position was no less than 70  the natural frequency should be higher than the cut-off frequency of stabilization platform was two or three times. In the engineering of electro-optical stabilization servo mechanism  -- filter has properties of tracking differential  and reached the requirement of platform angular velocity estimation. Also it is one of the effective methods to get angular velocity from angular position sensors. 2011 IEEE.   Driving and image enhancement for CCD sensing image system (EI CONFERENCE) 会议论文  OAI收割 2010 3rd IEEE International Conference on Computer Science and Information Technology, ICCSIT 2010, July 9, 2010 - July 11, 2010, Chengdu, China Zhang M.; Ren J. 收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25 The paper designs a driving circuit of high sensitive  wide dynamic for CCD sensing imaging system which adopts a Dalsa-made high resolution full-frame 33-mega pixels area CCD FTF5066M. Field Programmable Gate Array (FPGA) is used as the main device to accomplish the timing design of the circuits and power driver control of the sensor. By using the Correlated Double Sampling (CDS) technique  the video noise is reduced and the SNR of the system is increased. The output rate of the imaging system designed with integrated chip can reach to 1.3 frames per second through bi-channel output. We use the histogram specification to adjust the brightness of the captured image. And then use the median filtering to suppress the noise. The traditional gray mean gradient (GMG) and the objective evaluation method based on Human Visual System (HVS) used to verify the effect of image enhancement. 2010 IEEE.