World Animal Review最新文献

Thresholding of images in combination with 'improved MAX-MIN filters' 结合“改进的MAX-MIN滤波器”的图像阈值分割

World Animal Review Pub Date : 2001-11-01 DOI: 10.17660/ACTAHORTIC.2001.562.9

J. Hofstee

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引用次数: 0

Determining Effects of Fertilizer Particle Shape on Aerodynamic Properties 肥料颗粒形状对空气动力学特性影响的测定

World Animal Review Pub Date : 1997-04-24 DOI: 10.13031/2013.21239

J. Walker, T. Grift, J. Hofstee

{"title":"Determining Effects of Fertilizer Particle Shape on Aerodynamic Properties","authors":"J. Walker, T. Grift, J. Hofstee","doi":"10.13031/2013.21239","DOIUrl":"https://doi.org/10.13031/2013.21239","url":null,"abstract":"A method was investigated for determining the extent to which aerodynamic properties of fertilizer particles \u0000can be explained by a combination of turbulent airflow theory and a response surface involving geometric shape and \u0000mass of particles for a sample of specific fertilizer material. Fall tests were conducted, where particles were dropped and \u0000fall times were described by a mathematical model using turbulent airflow theory. Secondly, a measure of particle shape \u0000was determined to explain the difference between theoretical and measured fall times. Various dimensions of particles \u0000were measured using digital image processing. Absolute radius deviations from a preassumed best-fit circular shape were \u0000recorded and combined from two perpendicular particle images and designated “shape factor”. For a sample of calcium \u0000ammonium nitrate (CAN) particles, the shape factor ranged from 11.8 to 73.0 (perfect spheres are zero). Over that range, \u0000the difference between theoretical and measured fall times was satisfactorily explained (R2 = 0.82 ) by a function of shape \u0000factor and particle mass. A new approach to characterize a bulk of fertilizer material and its spreading properties was \u0000proposed.","PeriodicalId":197107,"journal":{"name":"World Animal Review","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133460618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Reconstruction and explanation of foundational development 基础发展的重建与解释

World Animal Review Pub Date : 1900-01-01 DOI: 10.1007/978-94-015-8782-2_5

M. Korthals

引用次数: 0

Dimensions of individual and collective development in various domains 各个领域的个人和集体发展的维度

World Animal Review Pub Date : 1900-01-01 DOI: 10.1007/978-94-015-8782-2_7

M. Korthals

引用次数: 1

Dynamics in consumer behavior with respect to agricultural and food products 与农产品和食品相关的消费者行为动态

World Animal Review Pub Date : 1900-01-01 DOI: 10.1007/978-1-4615-6273-3_8

J. Steenkamp

引用次数: 290