Search results: 384,320 results (approx.)

1. Reflectance spectroscopy with operator difference for determination of behenic acid in edible vegetable oils by using convolutional neural network and polynomial correction.

A novel polynomial correction method, order-adaptive polynomial correction (OAPC), was proposed to correct reflectance spectra with operator differences, and convolutional neural network (CNN) was used to develop analysis model to predict behenic acid in edible oils. With application of OAPC, CNN...

Author(s) : Weng ShiZhuang; Chu ZhaoJie; Wang ManQin; Han KaiXuan; Zhu GongQin; Liu CunChuan; Li XinHua; Huang LinSheng

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Food Chemistry 2022 Vol.367 ref.39

2. Determination of hardness for maize kernels based on hyperspectral imaging.

In order to realize rapid and non-destructive detection of hardness for maize kernels, a method for quantitative hardness measurement was proposed based on hyperspectral imaging technology. Firstly, the regression model of hardness and moisture content was established. Then, based on reflectance...

Author(s) : Qiao MengMeng; Xu Yang; Xia GuoYi; Su Yuan; Lu Bing; Gao XiaoJun; Fan HongFei

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Food Chemistry 2022 Vol.366

3. Computational modeling predicts potential effects of the herbal infusion "horchata" against COVID-19.

Bioactive plant-derived molecules have emerged as therapeutic alternatives in the fight against the COVID-19 pandemic. In this investigation, principal bioactive compounds of the herbal infusion "horchata" from Ecuador were studied as potential novel inhibitors of the SARS-CoV-2 virus. The chemical ...

Author(s) : Tejera, E.; Pérez-Castillo, Y.; Toscano, G.; Noboa, A. L.; Ochoa-Herrera, V.; Giampieri, F.; Álvarez-Suarez, J. M.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Food Chemistry 2022 Vol.366 ref.43

4. A numerical approach to the multi-objective geometric programming problem.

Geometric Programming is a special type of nonlinear optimization problems. One of multi-objective programming problems encountered in the optimization problem is the multi-objective geometric programming problem. In this study, a method is developed based on Kuhn-Tucker Conditions and Taylor...

Publisher : Departmento de Enfermedades Infecciosas y Tropicales, Universidade del Zulia, Maracaibo, Venezuela

Journal article : Kasmera 2021 Vol.49 No.1

5. Advances in root architectural modeling.

Author(s) : Postma, J. A.; Black, C. K.

Publisher : Burleigh Dodds Science Publishing Limited, Cambridge, UK

Book chapter : Understanding and improving crop root function 2021 pp.3-32 ref.many

6. The dataframe concept.

R objects come in a variety of types: dataframes, matrices, vectors, and arrays for example. Dataframes are an important concept in R, allowing vectors of different types to be combined column-wise into a single object. This chapter discusses combining sets of tables for data collected on different ...

Author(s) : Quicke, D.; Butcher, B. A.; Welton, R. K.

Book chapter : Practical R for biologists: an introduction 2021 pp.31-36

7. Sets and Venn diagrams.

This chapter focuses on sets and Venn diagrams. Venn diagrams, also known as set diagrams, are commonly used to represent the overlap between sets. However, there is no in-built Venn diagram function in R so packages are used.

Author(s) : Quicke, D.; Butcher, B. A.; Welton, R. K.

Book chapter : Practical R for biologists: an introduction 2021 pp.85-94

8. Statistics: choosing the right test.

Whilst this is not a book on statistics per se, one of the things R is most used for is doing statistical analyses. There are many sorts of statistical analyses and choosing the most appropriate ones can be very confusing for students. This chapter outlines the basic sorts of tests and analyses.

Author(s) : Quicke, D. L. J.; Butcher, B. A.; Welton, R. A. K.

Book chapter : Practical R for biologists: an introduction 2021 pp.95-102

9. Commonly used measures and statistical tests.

There are a number of statistical tests that are frequently used, even by non-specialists. This chapter will cover tests such as Chi-squared, Fisher's exact test, Mann-Whitney U and several variations of the Student's t-test, amongst others.

Author(s) : Quicke, D. L. J.; Butcher, B. A.; Welton, R. A. K.

Book chapter : Practical R for biologists: an introduction 2021 pp.103-118

10. Monte Carlo tests and randomization.

This chapter focuses on Monte Carlo tests and randomization. It involves randomizing the observed numbers many times and comparing the randomized results with the original observed data. It is shown how randomization can be used in experimental design and sampling.

Author(s) : Quicke, D.; Butcher, B. A.; Welton, R. K.

Book chapter : Practical R for biologists: an introduction 2021 pp.187-193

11. Introduction.

This chapter focuses on crop management as the foundation of production agriculture. It provides information needed to construct a unified model of the yield production process that applies to all grain crops.

Author(s) : Egli, D. B.

Book chapter : Applied crop physiology: understanding the fundamentals of grain crop management 2021 pp.1-14

13. Environmental assessment, monitoring and modelling.

This chapter contains questions about the equipment and methods used to conduct environmental assessments, monitor biodiversity and model ecological systems.

Author(s) : Rees, P. A.

Book chapter : Key questions in applied ecology and conservation: a study and revision guide 2021 pp.161-179

14. The search value model: detecting abnormal searching behavior.

Author(s) : Nicolau, J. L.; Kim HyoEun; Liu XianWei

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Annals of Tourism Research 2021 Vol.87

16. Compression in stochastic frontier models.

Author(s) : Tsionas, M. G.; Assaf, A. G.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Annals of Tourism Research 2021 Vol.88

17. Epimutations define a fast-ticking molecular clock in plants.

Stochastic gains and losses of DNA methylation at CG dinucleotides are a frequent occurrence in plants. These spontaneous 'epimutations' occur at a rate that is 100 000 times higher than the genetic mutation rate, are effectively neutral at the genome-wide scale, and are stably inherited across...

Author(s) : Yao Nan; Schmitz, R. J.; Johannes, F.

Publisher : Cell Press, Cambridge, USA

Journal article : Trends in Genetics 2021 Vol.37 No.8 pp.699-710 ref.91

18. Describing alpine lake influence on stream network temperatures: a statistical modelling approach.

Systematic variations in atmospheric heat exchange, surface residence time, and groundwater influx across montane stream networks commonly produce an increasing stream temperature trend with decreasing elevation. However, complex stream temperature profiles that differ from this common longitudinal ...

Author(s) : Carlson, S. P.; Poole, G. C.

Publisher : Wiley, Chichester, UK

Journal article : Hydrological Processes 2021 Vol.35 No.3

19. Application of an adaptive PID controller enhanced by a differential evolution algorithm for precise control of dissolved oxygen in recirculating aquaculture systems.

In aquaculture, the dissolved oxygen (DO) content of a water body is important for the growth of aquatic products and thus needs to be precisely controlled. For this purpose, through an open-loop experiment of DO aeration under different airflow rates, empirical transfer function models that can...

Author(s) : Zhou XinHui; Li DaoLiang; Zhang Lu; Duan QingLing

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Biosystems Engineering 2021 Vol.208 pp.186-198

20. Distribution characteristics and parameter optimisation of an air-assisted centralised seed-metering device for rapeseed using a CFD-DEM coupled simulation.

A numerical study was carried out on the motion characteristics of rapeseeds in the two-phase flow of the distribution head of an air-assisted centralised seed-metering device based on coupled simulations using computational fluid dynamics (CFD) and discrete element method (DEM). The effects of...

Author(s) : Hu HongJi; Zhou ZhongLin; Wu WenCheng; Yang WenHao; Li Tao; Chang Cheng; Ren WanJun; Lei XiaoLong

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Biosystems Engineering 2021 Vol.208 pp.246-259

21. Development of pixel-wise u-net model to assess performance of cereal sowing.

Estimating the plant population after the emergence of plants seems to be the most accurate way to make a fair judgment about the quality of the sowing across a field. A pixel-level classification model based on deep learning methods was used to predict each pixel in the image to recognise the...

Author(s) : Karimi, H.; Navid, H.; Seyedarabi, H.; Jørgensen, R. N.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Biosystems Engineering 2021 Vol.208 pp.260-271

22. Sensitivity analysis of fine dust spreading from litter in poultry houses.

Poultry houses are one of the major sources of agricultural particulate matter (PM) emissions into the environment. Litter properties, poultry activities, and indoor climate of poultry houses are the main parameters that influence the dust emission, but precise quantitative effects and their...

Author(s) : Derakhshani, S. M.; Ogink, N. W. M.; Bos, B. A. P.; Groot Koerkamp, P. W. G.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Biosystems Engineering 2021 Vol.208 pp.272-286 ref.46

23. A cnn-based lightweight ensemble model for detecting defective carrots.

Carrot grading plays a crucial role in producing high-competitive carrot products. However, carrot grading mainly depends on manual work nowadays, and this unreliable situation leads to high labor consumption, low efficiency, and unstable standard. In this study, a lightweight model (CarrotNet)...

Author(s) : Xie WeiJun; Wei Shuo; Zheng ZhaoHui; Yang DeYong

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Biosystems Engineering 2021 Vol.208 pp.287-299

24. Fruit development modelling and performance analysis of automatic greenhouse control.

This paper presents a receding horizon optimal control (RHOC) method with an economic objective function for balancing the cost of resources (resource use×cost) with income through yield (yield×product price). This paper considers the two elements that determine the income through yield. The first...

Author(s) : Kuijpers, W. J. P.; Antunes, D. J.; Hemming, S.; Henten, E. J. van; Molengraft, M. J. G. van de

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Biosystems Engineering 2021 Vol.208 pp.300-318 ref.22

25. Evaluating soil water routing approaches in watershed-scale, ecohydrologic modelling.

Soil water dynamics are central in linking and regulating natural cycles in ecohydrology, however, mathematical representation of soil water processes in models is challenging given the complexity of these interactions. To assess the impacts of soil water simulation approaches on various model...

Author(s) : Pignotti, G.; Chaubey, I.; Cherkauer, K.; Williams, M.; Crawford, M.

Publisher : Wiley, Chichester, UK

Journal article : Hydrological Processes 2021 Vol.35 No.3