Search results for "MRA"

Typification of the name orobanche ebuli huter & rigo (orobanchaceae) and its taxonomic implications

2018

The present contribution is part of the ongoing work aimed at researching and identifying the original material on which the names of Orobanche Linnaeus (1753: 632) described for Europe and the Mediterranean are based (Domina et al. 2005, Domina & Stepanek 2009, Domina et al. 2013, Carlón et al. 2015). It falls within the researches promoted by the Italian Botanical Society aimed at recognizing and typifying all the taxa described from Italy and their loci classici, in order to increase their systematic knowledge and promote further studies (Domina et al. 2012, Peruzzi et al. 2015, Brundu et al. 2017). Orobanche ebuli Huter & Rigo (1907: 354), is an Italian endemic (Peruzzi et al. 2…

Faba bean grain yield, N2 fixation, and weed infestation in a long-term tillage experiment under rainfed Mediterranean conditions

2012

Background and Aims Long-term experiments could provide valuable information to determine the effects of an agronomic practice on agro-ecosystem productivity and stability. This study evaluated the long-term (18-year) impact of different tillage systems on faba bean (Vicia faba L.) productivity, including weed and broomrape incidence, and N2 fixation. Methods The experiment was carried out on a Vertisol under rainfed Mediterranean conditions. It was set up as a strip plot design. The tillage systems were: conventional tillage (CT) with moldboard plow, reduced tillage (RT) with chisel plow, and no tillage (NT). Nitrogen fixation was estimated over 2 years in the final phase of the experiment…

Neural based MRAS sensorless techniques for high performance linear induction motor drives.

2010

This paper proposes a neural based MRAS (Model reference Adaptive System) speed observer suited for linear induction motors (LIM). Starting from the dynamical equation of the LIM in the synchronous reference frame in literature, the so-called voltage and current models of the LIM in the stationary reference frame, taking into consideration the end effects, have been deduced. Then, while the inductor equations have been used as reference model of the MRAS observer, the induced part equations have been discretized and rearranged so to be represented by a linear neural network (ADALINE). On this basis, the so called TLS EXIN neuron has been used to compute on-line, in recursive form, the machi…

Cows do not eat publications

2012

International audience; Scientific journals are facing an increasing competition directly impacting publishers and editorial boards. In addition, access to scientific information and reading patterns have deeply changed. From 2003 the journal Agronomy for Sustainable Development (ASD) has adapted its editorial policy to this highly competitive and moving environment in order to stand out and improve its impact (1). The scope, language and title of the journal were modified. A preselection step was introduced, several calls for reviews were made and spin-off books were published (2). Particular attention was given to abstracts, titles, colour figures and photos. A sister book series named Su…

Regularization of optical flow with M-band wavelet transform

2003

The optical flow is an important tool for problems arising in the analysis of image sequences. Flow fields generated by various existing solving techniques are often noisy and partially incorrect, especially near occlusions or motion boundaries. Therefore, the additional information on the scene gained from a sequence of images is usually worse. In this paper, discrete wavelet transform has been adopted in order to enhance the reliability of optical flow estimation. A generalization of the well-known dyadic orthonormal wavelets to the case of the dilation scale factor M > 2 with N vanishing moments has been used, and it has proved to be a useful regularizing tool. The advantages in the comp…

The status of Orobanche crenata in Sicily and preliminary observations on Orobanche crenata susceptibility in Vicia faba

2013

Since more than 10 years we are recording Orobanche crenata populations variations and testing traditional remedies to assess their applicability in a low impact agriculture that may be applied also in developing countries. Starting from the observation that often in C Sicily dense fields of Broadbean show lower Broomrape infestation, we did some preliminary observations on Orobanche crenata susceptibility in Vicia faba var. faba and Vicia faba var. equina with different agricultural techniques. First results show a higher resistance of the latter sowed at higher densities.

Radošās rakstīšanas un teksta sacerēšanas uzdevumu izmantošanas iespējas latviešu valodas stundās 2. klasē

2016

Diplomdarbā apskatīta viena no skolēnu radošās darbības formām – radošā rakstīšana un tekstu sacerēšana. Tā mērķis ir izpētīt radošās rakstīšanas un tekstu sacerēšanas veicināšanas iespējas latviešu valodas stundās 2. klasē, izveidojot un aprobējot daudzveidīgu radošu rakstīšanas un teksta sacerēšanas uzdevumu kopu. Sniegtas pedagoģijas klasiķu un latviešu valodas metodiķu atziņas par radošās rakstīšanas nozīmi sākumizglītības posmā. Izpētīti tās problēmaspekti, apzināti radošās tekstveides prasmju apguves metodiskie risinājumi. Analizēti skolēnu radošie darbi un attieksme pret radošo darbību. Diplomdarbam ir plaša pielikumu daļa, kurā ietverta radošās rakstīšanas uzdevumu kopa, darba lapas…

Orobanchaceae

2009

Orobanche cohenii (Orobanchaceae) a new species from Israel

2014

Orobanche cohenii a new species belonging to Orobanche sect. Trionychon is described and illustrated from Mt. Hermon, Israel. Its relationships with the other species of Orobanche sect. Trionychon occurring in this area are examined.

Improving the speed estimation by load torque estimation in induction motor drives: an MRAS and NUIO approach

2021

This paper proposes the application of the NUIO inside a FOC induction motor drive for the simultaneous estimation of the load torque and the rotor speed. The idea is to estimate at first the speed with the current model in parallel with a reference model developed on the basis of the voltage model of the induction machine. Then, the estimated speed is given as input to a nonlinear unknown input observer (NUIO) to estimate the load torque. This estimation is then used to correct the previous estimation of the speed. Simulation and experimental results confirm the goodness of the method for an extended range of speed and different load torque, and they confirm the reduction of error in trans…