Search Results - "Tian, Yongchao"

Updates to JRC-JCS model for estimating the peak shear strength of rock joints based on quantified surface description by Liu, Quansheng, Tian, Yongchao, Liu, Dongfeng, Jiang, Yalong

“…The surface morphology of joints has a significant effect on the mechanical properties of rock masses. The key morphological indices developed in this study…”
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A Wheat Spike Detection Method in UAV Images Based on Improved YOLOv5 by Zhao, Jianqing, Zhang, Xiaohu, Yan, Jiawei, Qiu, Xiaolei, Yao, Xia, Tian, Yongchao, Zhu, Yan, Cao, Weixing

“…Deep-learning-based object detection algorithms have significantly improved the performance of wheat spike detection. However, UAV images crowned with…”
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Improved estimation of rice aboveground biomass combining textural and spectral analysis of UAV imagery by Zheng, Hengbiao, Cheng, Tao, Zhou, Meng, Li, Dong, Yao, Xia, Tian, Yongchao, Cao, Weixing, Zhu, Yan

“…Crop aboveground biomass (AGB) is one of the most important indicators in crop breeding and crop management, and can be used for crop yield prediction. A…”
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Numerical simulation of stress-strain behaviour of cemented paste backfill in triaxial compression by Liu, Quansheng, Liu, Dongfeng, Tian, Yongchao, Liu, Xiaoyan

“…This paper develops a numerical model to reproduce the stress-strain curve of cemented paste backfill (CPB) based on the discrete element method-2 dimensional…”
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Predicting grain yield and protein content in wheat by fusing multi-sensor and multi-temporal remote-sensing images by Wang, Laigang, Tian, Yongchao, Yao, Xia, Zhu, Yan, Cao, Weixing

“…•An algorithm for fusing vegetation indices with different spatial and temporal resolution was developed.•The optimal spectral index for predicting grain yield…”
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Experimental Investigation of the Peak Shear Strength Criterion Based on Three-Dimensional Surface Description by Liu, Quansheng, Tian, Yongchao, Ji, Peiqi, Ma, Hao

“…The three-dimensional (3D) morphology of joints is enormously important for the shear mechanical properties of rock. In this study, three-dimensional…”
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New peak shear strength model for cement filled rock joints by Tian, Yongchao, Liu, Quansheng, Ma, Hao, Liu, Qi, Deng, Penghai

“…Grouting can significantly improve the mechanical properties of a fractured rock mass. A set of indoor grouting test systems is designed, and 3D scanning and…”
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Estimation of Wheat LAI at Middle to High Levels Using Unmanned Aerial Vehicle Narrowband Multispectral Imagery by Yao, Xia, Wang, Ni, Liu, Yong, Cheng, Tao, Tian, Yongchao, Chen, Qi, Zhu, Yan

“…Leaf area index (LAI) is a significant biophysical variable in the models of hydrology, climatology and crop growth. Rapid monitoring of LAI is critical in…”
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Climate change impacts on regional rice production in China by Lv, Zunfu, Zhu, Yan, Liu, Xiaojun, Ye, Hongbao, Tian, Yongchao, Li, Feifei

“…Rice ( Oryza sativa L.) production is an important contributor to China’s food security. Climate change, and its impact on rice production, presents challenges…”
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Combining Unmanned Aerial Vehicle (UAV)-Based Multispectral Imagery and Ground-Based Hyperspectral Data for Plant Nitrogen Concentration Estimation in Rice by Zheng, Hengbiao, Cheng, Tao, Li, Dong, Yao, Xia, Tian, Yongchao, Cao, Weixing, Zhu, Yan

“…Plant nitrogen concentration (PNC) is a critical indicator of N status for crops, and can be used for N nutrition diagnosis and management. This work aims to…”
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Improved estimation of aboveground biomass in wheat from RGB imagery and point cloud data acquired with a low-cost unmanned aerial vehicle system by Lu, Ning, Zhou, Jie, Han, Zixu, Li, Dong, Cao, Qiang, Yao, Xia, Tian, Yongchao, Zhu, Yan, Cao, Weixing, Cheng, Tao

“…Aboveground biomass (AGB) is a widely used agronomic parameter for characterizing crop growth status and predicting grain yield. The rapid and accurate…”
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Wheat Growth Monitoring and Yield Estimation based on Multi-Rotor Unmanned Aerial Vehicle by Fu, Zhaopeng, Jiang, Jie, Gao, Yang, Krienke, Brian, Wang, Meng, Zhong, Kaitai, Cao, Qiang, Tian, Yongchao, Zhu, Yan, Cao, Weixing, Liu, Xiaojun

“…Leaf area index (LAI) and leaf dry matter (LDM) are important indices of crop growth. Real-time, nondestructive monitoring of crop growth is instructive for…”
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TRiP : a transfer learning based rice disease phenotype recognition platform using SENet and microservices by Yuan, Peisen, Xia, Ye, Tian, Yongchao, Xu, Huanliang

“…Classification of rice disease is one significant research topics in rice phenotyping. Recognition of rice diseases such as , , , , and are a critical research…”
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Evaluation of RGB, Color-Infrared and Multispectral Images Acquired from Unmanned Aerial Systems for the Estimation of Nitrogen Accumulation in Rice by Zheng, Hengbiao, Cheng, Tao, Li, Dong, Zhou, Xiang, Yao, Xia, Tian, Yongchao, Cao, Weixing, Zhu, Yan

“…Unmanned aerial system (UAS)-based remote sensing is one promising technique for precision crop management, but few studies have reported the applications of…”
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Combining Color Indices and Textures of UAV-Based Digital Imagery for Rice LAI Estimation by Li, Songyang, Yuan, Fei, Ata-UI-Karim, Syed Tahir, Zheng, Hengbiao, Cheng, Tao, Liu, Xiaojun, Tian, Yongchao, Zhu, Yan, Cao, Weixing, Cao, Qiang

“…Leaf area index (LAI) is a fundamental indicator of plant growth status in agronomic and environmental studies. Due to rapid advances in unmanned aerial…”
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Monitoring leaf potassium content using hyperspectral vegetation indices in rice leaves by Lu, Jingshan, Yang, Tiancheng, Su, Xi, Qi, Hao, Yao, Xia, Cheng, Tao, Zhu, Yan, Cao, Weixing, Tian, Yongchao

“…Potassium (K) is one of three main crop nutrients, and the high rate of potash fertilizer utilization (second only to nitrogen) leads to high prices…”
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A Comparative Assessment of Different Modeling Algorithms for Estimating Leaf Nitrogen Content in Winter Wheat Using Multispectral Images from an Unmanned Aerial Vehicle by Zheng, Hengbiao, Li, Wei, Jiang, Jiale, Liu, Yong, Cheng, Tao, Tian, Yongchao, Zhu, Yan, Cao, Weixing, Zhang, Yu, Yao, Xia

“…Unmanned aerial vehicle (UAV)-based remote sensing (RS) possesses the significant advantage of being able to efficiently collect images for precision…”
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Using a Portable Active Sensor to Monitor Growth Parameters and Predict Grain Yield of Winter Wheat by Zhang, Jiayi, Liu, Xia, Liang, Yan, Cao, Qiang, Tian, Yongchao, Zhu, Yan, Cao, Weixing, Liu, Xiaojun

“…Rapid and effective acquisition of crop growth information is a crucial step of precision agriculture for making in-season management decisions. Active canopy…”
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Predicting Rice Grain Yield Based on Dynamic Changes in Vegetation Indexes during Early to Mid-Growth Stages by Zhang, Ke, Ge, Xiaokang, Shen, Pengcheng, Li, Wanyu, Liu, Xiaojun, Cao, Qiang, Zhu, Yan, Cao, Weixing, Tian, Yongchao

“…Predicting the grain yield during early to mid-growth stages is important for initial diagnosis of rice and quantitative regulation of topdressing. In this…”
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Extremely large deformation of tunnel induced by rock mass fracture using GPGPU parallel FDEM by Ma, Hao, Wang, Weiqin, Liu, Quansheng, Tian, Yongchao, Jiang, Yalong, Liu, He, Huang, Dan

“…It is essential to better understand the large deformation behavior of deep tunnels in weak rock mass to improve the long‐term stability of tunnel surrounding…”
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