STATISTICS

作品数：859被引量：6220H指数：17
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An object detection method for bayberry trees based on an improved YOLO algorithm被引量：8
《International Journal of Digital Earth》2023年第1期781-805,共25页Youliang Chen Hanli Xu Xiangjun Zhang Peng Gao Zhigang Xu Xiaobin Huang 
supported by the Fujian Science and Technology Program(grant numbers 2021Y0074);the Fujian Science and Technology Innovation Fund(grant numbers 2020SHQM14;XIQM009).
To quickly detect and count the number of bayberry trees,this paper improves the YOLO-v4 model and proposes an optimal YOLO-v4 method for detecting bayberry trees based on UAV images.We used the Leaky_ReLU activation ...
关键词：Object detection YOLO-v4 deep learning bayberry trees plant number statistics 
An adaptive strategy for statistics collecting in distributed database
《Frontiers of Computer Science》2020年第5期199-211,共13页Jintao Gao Wenjie Liu Zhanhuai Li 
This project was supported by Key Research and Development Program(2018YFB1003403);the National Natural Science Foundation of China(Grant Nos.61732014,61672432,61672434);Natural Science Basic Research Plan in Shaanxi Province of China(2017JM6104).
Collecting statistics is a time-and resource-consuming operation in database systems.It is even more challenging to efficiently collect statistics without affecting system performance,meanwhile keeping correctness in ...
关键词：statistics collecting distributed database adaptive strategy query optimization 
An emerging market for groundwater remediation in China： Policies, statistics, and future outlook被引量：5
《Frontiers of Environmental Science & Engineering》2018年第1期1-3,共3页Deyi Hou Guanghe Li Paul Nathanai 
There is a rapidly emerging and potentially huge market for the remediation of contaminated ground- water in China. The Chinese government published a Water Action Plan in April 2015, a Soil Action Plan in May 2016, a...
关键词：Groundwater pollution Contaminated land Groundwater remediation Emerging market 
INTERVAL TIME SERIES ANALYSIS WITH AN APPLICATION TO THE STERLING-DOLLAR EXCHANGE RATE被引量：4
《Journal of Systems Science & Complexity》2008年第4期558-573,共16页Ai HAN Yongmiao HONG K. K. LAI Shouyang WANG 
This work was partially supported by the National Natural Science Foundation of China and Research Granting Committee of Hong Kong
Traditional econometrics has long employed ＂points＂ to measure time series data. In real life situations, however, it suffers the loss of volatility information, since many variables are bounded by intervals in a gi...
关键词：Evaluation criteria interval-based estimation interval linear model interval statistics interval stationarity interval stochastic process. 
Application of an Error Statistics Estimation Method to the PSAS Forecast Error Covariance Model被引量：1
《Advances in Atmospheric Sciences》2006年第1期33-44,共12页Runhua YANG Jing GUO Lars Peter RIISHФJGAARD 
In atmospheric data assimilation systems, the forecast error covariance model is an important component. However, the paralneters required by a forecast error covariance model are difficult to obtain due to the absenc...
关键词：forecast error statistics estimation data analysis forecast error covariance model 
Fisheries statistics—— An importanttool for managers and scientists被引量：3
《海洋水产研究》2001年第4期10-17,共8页GretheAa.Kuhnle 
关键词：渔业统计 渔业管理者 科学家 工具 
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