Showing 381 - 400 results of 3,087 for search '"nitrogen"', query time: 0.08s Refine Results
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    Accounting for differences between crops and regions reduces estimates of nitrate leaching from nitrogen-fertilized soils by Yan Wang, Yihong Liu, Longlong Xia, Hiroko Akiyama, Xinli Chen, Ji Chen, Yunying Fang, Tony Vancov, Yongfu Li, YuanZhi Yao, Dianming Wu, Bing Yu, Scott X. Chang, Yanjiang Cai

    Published 2025-01-01
    “…Abstract Nitrate (NO3 −) leaching from nitrogen (N) fertilized soils is a significant global concern, affecting both the environment and public health. …”
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    Perennial Peanut as a Potential Living Mulch and Nitrogen Source for Citrus and Other Orchard Crops in Florida by M.A. Shahid, K. Leaks, A.R. Blount, Cheryl Mackowiak

    Published 2023-11-01
    “… The concept of using a perennial peanut as a living mulch and source of biological nitrogen in fruit and nut crop orchards is not a new idea. …”
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  7. 387

    Numerical Analysis of the Horvath–Kawazoe Equation — The Adsorption of Nitrogen, Argon, Benzene, Carbon Tetrachloride and Sulphur Hexafluoride by Piotr Kowalczyk, Artur P. Terzyk, Piotr A. Gauden, Gerhard Rychlicki

    Published 2002-04-01
    “…These allowed the evaluation of the distribution from a single adsorption isotherm of nitrogen, argon, benzene, carbon tetrachloride and sulphur hexafluoride. …”
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    Phragmites australis + Typha latifolia Community Enhanced the Enrichment of Nitrogen and Phosphorus in the Soil of Qin Lake Wetland by Zhiwei Ge, Ran An, Shuiyuan Fang, Pengpeng Lin, Chuan Li, Jianhui Xue, Shuiqiang Yu

    Published 2017-01-01
    “…Aquatic plants play an essential role and are effective in mitigating lake eutrophication by forming complex plant-soil system and retaining total nitrogen (TN) and phosphorus (TP) in soils to ultimately reduce their quantities in aquatic systems. …”
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    Article
  10. 390

    Study on Fluid Front Motion of Water, Nitrogen, and CO2 during Anisotropic Flow in Shale Reservoirs by Xiangxiang Zhang, Kai Gu, Chengyu Liu, Yangbing Cao, J. G. Wang, Feng Gao

    Published 2022-01-01
    “…In this work, a numerical model was proposed to detect the front motion of water, nitrogen, and CO2 in anisotropic shale reservoirs. …”
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    Article
  11. 391

    Gaussian Process Regression Total Nitrogen Prediction Based on Data Decomposition Technology and Several Intelligent Algorithms by WANG Yongshun, CUI Dongwen

    Published 2023-01-01
    “…Total nitrogen (TN) is one of the important indicators to reflect the degree of water pollution and measure the eutrophication status of lakes and reservoirs.To improve the accuracy of TN prediction,based on the empirical wavelet transform (EWT) and wavelet packet transform (WPT) decomposition technology,this paper proposes a Gaussian process regression (GPR) prediction model optimized by osprey optimization algorithm (OOA),rime optimization algorithm (ROA),bald eagle search (BES) and black widow optimization algorithm (BWOA) respectively.Firstly,the TN time series is decomposed into several more regular subsequence components by EWT and WPT respectively.Then,the paper briefly introduces the principles of OOA,ROA,BES,and BWOA algorithms and applies OOA,ROA,BES,and BWOA to optimize GPR hyperparameters.Finally,EWT-OOA-GPR,EWT-ROA-GPR,EWT-BES-GPR,EWT-BWOA-GPR,WPT-OOA-GPR,WPT-ROA-GPR,WPT-BES-GPR,WPT-BWOA-GPR models (EWT-OOA-GPR and other eight models for short) are established to predict the components of TN by the optimized super-parameters.The final prediction results are obtained after reconstruction,and WT-OOA-GPR,WT-ROA-GPR,WT-BES-GPR and WT-BWOA-GPR models based on wavelet transform (WT) are built.Eight models,including EWT-OOA-SVM based on support vector machine (SVM),the paper compares the unoptimized EWT-GPR,WPT-GPR models,and the uncomposed OOA-GPR,ROA-GPR,BES-GPR,and BWOA-GPR models.The models were verified by the monitoring TN concentration time series data of Mudihe Reservoir,an important drinking water source in China,from 2008 to 2022.The results are as follows.① The average absolute percentage error of eight models such as EWT-OOA-GPR for TN prediction is between 0.161% and 0.219%,and the coefficient of determination is 0.999 9,which is superior to other comparison models,with higher prediction accuracy and better generalization ability.② EWT takes into account the advantages of WT and EMD.WPT can decompose low-frequency and high-frequency signals at the same time.Both of them can decompose TN time series data into more regular modal components,significantly improving the accuracy of model prediction,and the decomposition effect is better than that of the WT method.③ OOA,ROA,BES,and BWOA can effectively optimize GPR hyperparameters and improve GPR prediction performance.…”
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  12. 392

    Impact of Nitrogen Fertilizer Applications on Surface Water Nitrate Levels within a Kenyan Tea Plantation by J. K. Maghanga, J. L. Kituyi, P. O. Kisinyo, W. K. Ng’etich

    Published 2013-01-01
    “…Tea production in the Kenyan Rift Valley uses high rates of nitrogenous fertilizer. Nitrates can be discharged to water bodies through leaching and surface run-off. …”
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    Nitrogen Incorporation in TiO2: Does It Make a Visible Light Photo-Active Material? by B. Viswanathan, K. R. Krishanmurthy

    Published 2012-01-01
    “…Doping of TiO2 with nitrogen is one such method. The purpose of this presentation is to examine the state and location of nitrogen introduced in TiO2 lattice and how far the shift of optical response to visible radiation can be beneficial for the observed photo-catalysis. …”
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  17. 397

    Mechanistic and Experimental Aspects of the Structural Characterization of Some Model and Real Systems by Nitrogen Sorption and Mercury Porosimetry by Carlos Felipe, Fernando Rojas, Isaac Kornhauser, Matthias Thommes, Giorgio Zgrablich

    Published 2006-10-01
    “…Several mechanistic and phenomenological aspects of mercury intrusion and nitrogen sorption processes involving some model and real mesoporous systems were studied. …”
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    Study of Highly Stable Nitrogen-Doped a-InGaSnO Thin-Film Transistors by Wenyang Zhang, Li Lu, Chenfei Li, Weijie Jiang, Wenzhao Wang, Xingqiang Liu, Ablat Abliz, Da Wan

    Published 2024-01-01
    “…Herein, highly stable nitrogen (N) doped amorphous indium gallium tin oxide (a-IGTO) thinfilm transistors (TFTs) are prepared and the effects of N-doping are investigated. …”
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  20. 400

    Adsorption removing various basic nitrogen compounds from model diesel over allochroic silica gel by Xin Hong, Yunhe Li, Chang Gao, Yonghua Zhao, Ke Tang

    Published 2018-12-01
    “…The N–Co bond between Co in allochroic silica gel and N atom in the basic nitrogen compounds molecule played a significant role. …”
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