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Standardizing and Centralizing Datasets for Efficient Training of Agricultural Deep Learning Models

Plant Phenomics 2023年第4期5卷 689-702页

作者： Amogh joshi Dario Guevara Mason Earles Department of Viticulture and Enology University of CaliforniaDavisDavisCAUSA Department of Biological and Agricultural Engineering University of CaliforniaDavisDavisCAUSA AI Institute for Next-Generation Food Systems(AIFS) University of CaliforniaDavisDavisCAUSA

In recent years,deep learning models have become the standard for agricultural computer *** models are typically fine-tuned to agricultural tasks using model weights that were originally fit to more general,non-agricultural *** lack of agriculture-specific fine-tuning potentially increases training time and resource use,and decreases model performance,leading to an overall decrease in data *** overcome this limitation,we collect a wide range of existing public datasets for 3 distinct tasks,standardize them,and construct standard training and evaluation pipelines,providing us with a set of benchmarks and pretrained *** then conduct a number of experiments using methods that are commonly used in deep learning tasks but unexplored in their domain-specific applications for *** experiments guide us in developing a number of approaches to improve data efficiency when training agricultural deep learning models,without large-scale modifications to existing *** results demonstrate that even slight training modifications,such as using agricultural pretrained model weights,or adopting specific spatial augmentations into data processing pipelines,can considerably boost model performance and result in shorter convergence time,saving training ***,we find that even models trained on low-quality annotations can produce comparable levels of performance to their high-quality equivalents,suggesting that datasets with poor annotations can still be used for training,expanding the pool of currently available *** methods are broadly applicable throughout agricultural deep learning and present high potential for substantial data efficiency improvements.

关键词： weights overcome shorter

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Disturbance Observer Based Speed Control of PMSM Using Fractional Order PI Controller

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IEEE/CAA Journal of Automatica Sinica 2019年第1期6卷 316-326页

作者： Aishwarya Apte Ujjwala Thakar Vrunda joshi the Department of Electrical Engineering AISSMS College of Engineering PVG’s College of Engineering and Technology

In this paper, fractional order PI(FOPI) control is developed for speed control of permanent magnet synchronous motor(PMSM). Designing the parameters for FOPI controller is a challenging task, especially for nonlinear systems like *** three PI controllers in the conventional vector controlled speed drive are replaced by FOPI controllers. Design of these FOPI controllers is based on the locally linearized model of PMSM around an operating point. This operating point changes with the load torque. The novelty of the work reported here is in use of Non Linear Disturbance Observer(NLDO) to estimate load torque to obtain this new operating point. All three FOPI controllers are then designed adaptively using this new operating point. The scheme is tested on simulation using MATLAB/SIMULINK and results are presented.

关键词： Fractional order PI (FOPI) non linear disturbance observer (NLDO) permanent magnet synchronous motor(PMSM) vector control

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Three-dimensional computational characterization of grain size and texture effects in magnesium alloys

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Journal of Magnesium and Alloys 2023年第10期11卷 3657-3672页

作者： Shahmeer Baweja Shailendra P.joshi Department of Mechanical Engineering University of HoustonHoustonTX 77204-4006USA

This work systematically investigates the microstructure-property relationship in Mg alloys. Emphasis is placed on understanding, through high resolution crystal plasticity modeling, how grain size and texture collectively impact material strengthening and hardening, net plastic anisotropy, and tension-compression asymmetry. To achieve this, 528 fully three-dimensional finite element calculations are performed, which comprise eleven textures, four grain sizes, six loading orientations, and two uniaxial loading states(tension and compression). The grain size effect follows Hall-Petch relation that depends on both, loading orientation and initial texture. The reduction in extension twinning with grain size refinement is influenced by texture as well. Below a threshold textural strength, grain size refinement leads to an appreciable reduction in the net plastic anisotropy at yield, quantified using Hill anisotropy, and reduced tension-compression asymmetry. Using a micromechanical basis, the effect of grain size and texture on material ductility is predicted to be non-monotonic. The computational predictions serve as synthetic data sets for experimental validation and reduced-order modeling.

关键词： Mg alloys Microstructure-property relations Grain-size effect Crystal plasticity Damage micromechanics

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Long-term photometric study of a faint W UMa binary in the direction of M31

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Research in Astronomy and Astrophysics 2017年第11期17卷 59-70页

作者： Yogesh Chandra joshi Rukmini Jagirdar Aryabhatta Research Institute of Observational Sciences Manora Peak Nainital 263002 India Center for Advanced Study in Astronomy Osmania University 500007 India

We carry out a re-analysis of the photometric data in Rclc bands which were taken during the Nainital Microlensing Survey from 1998 to 2002 with the aim to detect gravitational microlensing events in the direction of M31. Here, we do photometric analysis of a faint W UMa binary CSS_JO04259.3＋410629 identified in the target field. The orbital period of this star is found to be 0.266402±0.000018 d. The photometric mass ratio, q, is found to be 0.28±0.01. The photometric light curves are investigated using the Wilson-Devinney （WD） code and absolute parameters are determined using empirical relations which provide masses and radii of the binary as M1 = 1.19±0.09M⊙, M2 = 0.33±0.02M⊙ and R1 = 1.02±0.04R⊙, R2 = 0.58±0.08Re respectively based on Rc band data. Quite similar values are found by analyzing/c band data. From the photometric light curve examination, the star is understood to be a low mass-ratio overcontact binary of A-subtype with a high fill-out factor of about 47%. The binary system is found to be located approximately at a distance of 2.64±0.03 kpc having a separation of 2.01 ±0.05 Re between the two components.

关键词： methods: observational -- techniques: photometric -- binaries: eclipsing -- stars: funda- mental parameters

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Numerical Modeling of Neotectonic Movements and State of Stresses in the Central Seismic Gap Region,Garhwal Himalaya

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Journal of Mountain Science 2008年第4期5卷 279-298页

作者： Ganesh Raj joshi Daigoro HAYASHI Simulation Tectonics Laboratory Faculty of ScienceUniversity of the RyukyusOkinawa 903-0213Japan

This paper presents finite element modeling （FEM） to simulate the present-day stress field and crustal deformation using NE-SW structural section in the central Seismic Gap region of the Garhwal Himalaya. Our study deals with the effect of geometrical characteristics and rock layer parameters on the upper crust. Modeling results show that two types of tectonic regimes developed in the central Seismic Gap region： the geotectonics of the northern part has been controlled by regional compression, whereas southern part is characterized by regional extension. Correspondingly, thrust faults are induced in the northern part and normal faults are extensively developed in the southern front. Those evidences noticeably indicate that the compressive tectonic environment of the Himalaya becomes change into the extensional tectonic regime in its front. The computed shear stress accumulation along the northern fiat of Main Himalayan Thrust （MHT） implies that considerable amount of interseismic stress is building up along the MHT system in the Himalaya, which ultimately release through the possible future great Himalayan earthquake （M 〉 8）. The comparison between our modeled stress field, faulting pattern and horizontal shortening rate with the distribution of the microseismic events, focal mechanism solutions, active faulting and GPS data in the central Seismic Gap region shows good agreement.

关键词： Neotectonic deformation stress distribution FE modeling central Seismic Gap NW-Himalaya

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Neutrino spin-flavor oscillations in solar environment

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Research in Astronomy and Astrophysics 2020年第8期20卷 201-210页

作者： Sandeep joshi Sudhir R.Jain Nuclear Physics Division Bhabha Atomic Research CentreMumbai 400085India Homi Bhabha National Institute Anushakti NagarMumbai 400094India

We study the phenomenon of neutrino spin-flavor oscillations due to solar magnetic *** allows us to examine how significantly the electron neutrinos produced in the solar interior undergo a resonant spin-flavor *** construct analytical models for the solar magnetic field in all the three regions of the *** spin-flavor oscillations in this magnetic field are examined by studying the level crossing phenomenon and comparing the two cases of zero and non-zero vacuum mixing *** from the Borexino experiment are used to place an upper limit on the magnetic field in the solar *** phenomena such as effects of matter on neutrino spin transitions and differences between Dirac and Majorana transitions in the solar magnetic fields are also discussed.

关键词： neutrinos:neutrino spin-flavor oscillations Sun:magnetic fields

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Role of liver transplantation in human immunodeficiency virus positive patients

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World Journal of Gastroenterology 2015年第43期21卷 12311-12321页

作者： Deepak joshi Kosh Agarwal Institute of Liver Studies King’s College Hospital NHS Foundation Trust

End-stage liver disease(ESLD) is a leading cause of morbidity and mortality amongst human immunodeficiency virus(HIV)-positive individuals. Chronic hepatitis B and hepatitis C virus(HCV) infection,drug-induced hepatotoxicity related to combined antiretro-viral therapy,alcohol related liver disease and non-alcohol related fatty liver disease appear to be the leading causes. It is therefore,anticipated that more HIV-positive patients with ESLD will present as potential transplant candidates. HIV infection is no longer a contraindication to liver transplantation. Key transplantation outcomes such as rejection and infection rates as well as medium term graft and patient survival match those seen in the non-HIV infected patients in the absence of co-existing HCV infection. HIV disease does not seem to be negatively impacted by transplantation. However,HIV-HCV coinfection transplant outcomes remain suboptimal due to recurrence. In this article,we review the key challenges faced by this patient cohort in the pre- and posttransplant period.

关键词： Hepatitis B virus Hepatitis C virus Human immunode

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Adaptive virtual MIMO-based cross-layer design for wireless sensor networks via hybrid optimization model

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International Journal of Modeling, Simulation, and Scientific Computing 2021年第2期12卷 20-39页

作者： Monali Prajapati Jay joshi Electronics&Communication Gujarat Technological University India Electronics&Communication Bhagwan Mahavir Polytechnic VesuSuratIndia

In recent times,many MAC protocols were implemented for boosting and improving energy efficiency(EE)in ***,the cooperative MIMO method is found to be much capable of enhancing the EE of WSNs if configured *** paper intends to propose cross-layer design for multihop virtual MIMO system to enhance the end-to-end(ETE)reliability,EE,and QoS of the adopted *** protocol is set here to focus on the energy utilization for transmission of data packets by optimal selection of transmission constraints for each node of the ***,the protocol’s ETE latency and throughput are also modeled as the dependent variables of BER performance of every *** discover the improved BER criteria of each link that meets the ETE QoS requirement in reduced energy utilization,this paper employs a new hybrid optimization algorithm named Lion Mutated Dragonfly Algorithm(LM–DA)that is a hybrid variant of both Lion Algorithm(LA)and Dragonfly Algorithm(DA).Finally,the performance of the adopted scheme is validated over other state-of-the-art *** results state that the energy consumed by the adopted LM–DA approach is about 2.65%,1.77%,and 1.77%reduced over LA,PSO,and DA schemes,respectively.

关键词： MIMO QoS provisioning energy utilization latency bit-error-rate LM-DA

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A New Exponential Fuzzy Entropy of Order-(α,β)and its Application in Multiple Attribute Decision-Making Problems

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Communications in Mathematics and Statistics 2017年第2期5卷 213-229页

作者： Rajesh joshi Satish Kumar Department of Mathematics Maharishi Markandeshwar University MullanaAmbala 133207India

Fuzzy entropy is an important concept to measure the fuzzy *** of fuzziness of a fuzzy set is the measure of its *** the present communication,we have defined an exponential fuzzy entropy of order-(α,β).Besides establishing the validity of the proposed measure,we have also discussed some of its *** last,we have given the application of the proposed measure in multiple attribute decision-making *** this section,we have considered two cases for the weights of attributes:One is the case when weights are completely unknown to us,and the other is the case when weights are partially known to us.

关键词： Exponential entropy Fuzzy set Fuzzy entropy Exponential fuzzy entropy MADM

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Net Primary Productivity and Species Diversity of Herbaceous Vegetation in Banj-oak (Quercus leucotri-chophora ***) Forest in Kumaun Himalaya,India

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Journal of Mountain Science 2011年第6期8卷 787-793页

作者： Mukesh joshi Y.S.RAWAT Department of Forestry and Natural Resources Post Box-59H.N.B.Garhwal University Department of Botany Kumaun University

Net primary productivity and species diversity of herbaceous vegetation of banj-oak （Quercus leucotrichophora A. Camus） forest in Kumaun Himalaya, India were analyzed. Across different growth forms （tall forbs, short forbs, cushion and spreading forbs, grasses）, short forbs were most dominant component during rainy season （1VI=152） and winter season （IVI=167） and grasses during the winter season （IVI=148）. Maximum above-ground production occurred during rainy season （132.5 g m-2） and minimum during winter season （2.8 g m-~）. Below-ground production was maximum （85.9 g m-x） during winter season and minimum （14.9 g m-x） during summer season. Annual net shoot production was 15o g m-~ and below-ground production was 138 g m-~. Of the total input 61% was channeled to above- ground parts and 39% to below-ground parts.

关键词： Biomass Diversity Net-primaryproductivity

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