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1. Aerial coverage optimization in precision agriculture management: A musical harmony inspired approach

Author:
Valente, João; Del Cerro, Jaime; Barrientos, Antonio; Sanz, David
Source:
Computers and electronics in agriculture 2013 v.99 pp. 153-159
ISSN:
0168-1699
Subject:
planning; algorithms; precision agriculture
Abstract:
... The coverage path planning (CPP) problem belongs to a sub-field of motion planning where the goal is to compute a complete coverage trajectory from initial to final position, within the robot workspace subjected to a set of restrictions. This problem has a complexity NP-complete, and has no general solution. Moreover, there are very few studies addressing this problem applied to aerial vehicles. P ...
DOI:
10.1016/j.compag.2013.09.008

2. Analysis of food appearance properties by computer vision applying ellipsoids to colour data

Author:
Rodríguez-Pulido, Francisco J.; Gordillo, Belén; Lourdes González-Miret, M.; Heredia, Francisco J.
Source:
Computers and electronics in agriculture 2013 v.99 pp. 108-115
ISSN:
0168-1699
Subject:
algorithms; color; computer vision; consumer preferences; food analysis; food composition; foods; image analysis; physicochemical properties
Abstract:
... The use of computer vision for estimating composition in food products has become wide spread in recent years, especially for products where by measuring colour or other spectral features, we are able to estimate the composition, variety, or ripeness. On the other hand, the appearance is one of the most worrying issues for producers due to its influence on quality and consumer preferences. Compute ...
DOI:
10.1016/j.compag.2013.08.027

3. A near-infrared reflectance sensor for soil surface moisture measurement

Author:
Yin, Zhe; Lei, Tingwu; Yan, Qinghong; Chen, Zhanpeng; Dong, Yuequn
Source:
Computers and electronics in agriculture 2013 v.99 pp. 101-107
ISSN:
0168-1699
Subject:
absorption; algorithms; laboratory experimentation; models; reflectance; soil properties; soil water; wavelengths
Abstract:
... Soil moisture is an important soil property that has important functions in various studies and applications, such as agricultural practices, hydrological processes and ecological issues. A near-infrared (NIR) reflectance sensor designed for moisture measurement at the soil surface is based on the reflectance of two light-emitting diodes (LEDs) of different wavelengths, in which one has a waveleng ...
DOI:
10.1016/j.compag.2013.08.029

4. Application of hyperspectral imaging technology to discriminate different geographical origins of Jatropha curcas L. seeds

Author:
Gao, Junfeng; Li, Xiaoli; Zhu, Fengle; He, Yong
Source:
Computers and electronics in agriculture 2013 v.99 pp. 186-193
ISSN:
0168-1699
Subject:
Jatropha curcas; algorithms; breeding; data collection; hyperspectral imagery; image analysis; models; prediction; principal component analysis; quality control; seeds; wavelengths; China; Taiwan
Abstract:
... A rapid and non-invasive method was investigated to identify the geographical origin of Jatropha curcas L. seeds in China by using near-infrared hyperspectral imaging technique on the wavelength between 874 and 1734nm. Two hundred and forty J. curcas L. seed samples from four different geographical origins (Jiangsu, Sichuan, Hainan and Taiwan) in China were studied and all of them were scanned by ...
DOI:
10.1016/j.compag.2013.09.011

5. Machine vision to identify broiler breeder behavior

Author:
Pereira, Danilo F.; Miyamoto, Bruno C.B.; Maia, Guilherme D.N.; Tatiana Sales, G.; Magalhães, Marcelo M.; Gates, Richard S.
Source:
Computers and electronics in agriculture 2013 v.99 pp. 194-199
ISSN:
0168-1699
Subject:
algorithms; animal behavior; broiler breeders; computer software; computer vision; hens; image analysis; video cameras
Abstract:
... Animal behavioral parameters can be used to assess welfare status in commercial broiler breeders. Behavioral parameters can be monitored with a variety of sensing devices, for instance, the use of video cameras allows comprehensive assessment of animal behavioral expressions. Nevertheless, the development of efficient methods and algorithms to continuously identify and differentiate animal behavio ...
DOI:
10.1016/j.compag.2013.09.012

6. Pyrolysis of orange waste: A thermo-kinetic study

Author:
Lopez-Velazquez, M.A.; Santes, V.; Balmaseda, J.; Torres-Garcia, E.
Source:
Journal of analytical and applied pyrolysis 2013 v.99 pp. 170-177
ISSN:
0165-2370
Subject:
activation energy; alcohols; aldehydes; algorithms; alkanes; carbon dioxide; carboxylic acids; energy; ethers; heat; ketones; lignin; nitrogen; phenolic compounds; pyrolysis; temperature; volatile compounds; wastes
Abstract:
... Thermal and kinetic decomposition of orange waste have been investigated by simultaneous TGA–DSC and TGA–FTIR analysis techniques under nitrogen atmosphere. Thermal profile degradation can be interpreted as the resultant of multiple, parallel and simultaneous reactions, related to: (i) dehydration process for temperatures ≤120°C; (ii) pyrolytic cracking, from 125 to 450°C, stage where the ligno-ce ...
DOI:
10.1016/j.jaap.2012.09.016

7. Time-optimal guidance control for an agricultural robot with orientation constraints

Author:
Dong, Fuhong; Petzold, Olaf; Heinemann, Wolfgang; Kasper, Roland
Source:
Computers and electronics in agriculture 2013 v.99 pp. 124-131
ISSN:
0168-1699
Subject:
algorithms; plant cultural practices; robots
Abstract:
... This paper deals with time-optimal control for the row guidance system of an autonomous field robot with differential drive. The movement of the robot is concretely constrained by the plant cultivation environment. A time-optimal differential velocity profile is generated based on optimal control theory to eliminate any initial error or tracking deviation. To allow for an efficient implementation ...
DOI:
10.1016/j.compag.2013.09.009