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Process-Based Crop Modeling for High Applicability with Attention Mechanism and Multitask Decoders

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Plant Phenomics 2023年第2期5卷 378-390页

作者： Taewon Moon Dongpil Kim Sungmin Kwon Jung Eek son Department of Agriculture Forestry and BioresourcesSeoul National UniversitySeoul 08826Republic of Korea Research Institute of Agriculture and Life Sciences Seoul National UniversitySeoul 08826Republic of Korea Protected Horticulture Research Institute National Institute of Horticultural&Herbal ScienceRural Development AdministrationHaman 52054Republic of Korea

Crop models have been developed for wide research purposes and scales,but they have low compatibility due to the diversity of current modeling *** model adaptability can lead to model *** deep neural networks have no conventional modeling parameters,diverse input and output combinations are possible depending on model *** these advantages,no process-based crop model has been tested in full deep neural network *** objective of this study was to develop a process-based deep learning model for hydroponic sweet *** mechanism and multitask learning were selected to process distinct growth factors from the environment *** algorithms were modified to be suitable for the regression task of growth *** were conducted twice a year for 2 years in *** developed crop model,DeepCrop,recorded the highest modeling efficiency(=0.76)and the lowest normalized mean squared error(=0.18)compared to accessible crop models in the evaluation with unseen *** t-distributed stochastic neighbor embedding distribution and the attention weights supported that DeepCrop could be analyzed in terms of cognitive *** the high adaptability of DeepCrop,the developed model can replace the existing crop models as a versatile tool that would reveal entangled agricultural systems with analysis of complicated information.

关键词： Deep replace versatile

Intraoperative radiofrequency ablation with or without tumorectomy for hepatocellular carcinoma in locations difficult for a percutaneous approach

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Hepatobiliary & Pancreatic Diseases International 2009年第6期8卷 591-596页

作者： Hyung Ook Kim Seung Kwon Kim Byung Ho son chang Hak Yoo Hyun Pyo Hong Yong Kyun Cho Byung Ik Kim Departments of Surgery Kangbuk Samsung Hospital Sungkyunkwan University School of Medicine Radiology Kangbuk Samsung Hospital Sungkyunkwan University School of Medicine Division of Interventional Radiology Mallinckrodt Institute of RadiologyWashington University School of Medicine Internal Medicine Kangbuk Samsung Hospital Sungkyunkwan University School of Medicine

BACKGROUND:Although hepatic resection is widely accepted as a proper modality for treating hepatocellular carcinoma(HCC),a majority of patients are unable to undergo surgical resection due to various tumor and patient *** ablation(RFA)has mostly been used as a therapeutic alternative to resection for treating *** objective of this study was to evaluate the results of intraoperative RFA for HCCs in locations difficult for a percutaneous ***:Eight patients(male,seven;age,49-67 years) with 8 HCCs in difficult locations were treated by intraoperative *** of the patients had local tumor progression after initial transarterial chemoembolization or ultrasound(US)guided percutaneous *** locations of the tumors were hepatic dome in six patients,posterior subcapsule in one,and caudate lobe in *** tumor size was 2.0 to 6.4 cm(mean,3.9 cm).Intraoperative RFA was performed at the tumor itself and an anticipated resection line under US guidance with 3 cm monopolar single or clustered internally cooled *** resection was performed in six *** month later,treatment response was assessed by contrast material-enhanced computed tomography(CT).CT studies were performed every 2 or 3 months after ***:RFA was technically successful in all tumors,and the contrast-enhanced CT images acquired one month later showed complete disappearance of tumor *** pneumothorax *** a median follow-up of 18 months(range,6-30 months),no tumors showed local *** the follow-up period,four new recurrent tumors were observed in three *** patients were alive at the time of this report and the other four died of hepatorenal syndrome,liver failure,and progression of new recurrent ***:Intraoperative RFA with tumor resection can be an alterative treatment option for HCC in locations difficult for a percutaneous approach.

关键词： hepatocellular carcinoma radiofrequency ablation intraoperative

Multi-Generator Discriminator Network Using Texture-Edge Information

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Computers, Materials & Continua 2023年第5期75卷 3537-3551页

作者： Kyeongseok Jang Seongsoo Cho Kwang Chul son Department of Plasma Bio Display Kwangwoon University20Gwangun-roNowon-guSeoul01897Korea School of Software Soongsil University369Sangdo-roDongjak-guSeoul06978Korea Department of Information Contents Kwangwoon University20Gwangun-roNowon-guSeoul01897Korea

In the proposed paper,a parallel structure type Generative Adversarial Network(GAN)using edge and texture information is *** the existing GAN-based model,many learning iterations had to be given to obtaining an output that was somewhat close to the original data,and noise and distortion occurred in the output image even when learning was *** solve this problem,the proposed model consists of two generators and three discriminators to propose a network in the form of a parallel *** the network,each edge information and texture information were received as inputs,learning was performed,and each character was combined and outputted through the Combine *** this,edge information and distortion of the output image were improved even with fewer iterations than DCGAN,which is the existing GAN-based *** a result of learning on the network of the proposed model,a clear image with improved contour and distortion of objects in the image was output from about 50,000 iterations.

关键词： Deep learning convolution neural network generative adversarial network edge information texture information

Length of negative resection margin does not affect local recurrence and survival in the patients with gastric cancer

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World Journal of Gastroenterology 2014年第30期20卷 10518-10524页

作者： chang Min Lee Ye Seob Jee Ju-Hee Lee Sang-Yong son Sang-Hoon Ahn Do Joong Park Hyung-Ho Kim Department of Surgery Seoul National University Bundang HospitalSeongnam 463-707South Korea Department of Surgery Dankook University HospitalCheonan 330-715South Korea Colledge of Medicine Dankook UniversityCheonan 330-715South Korea Department of Surgery Hanyang University Medical CenterSeoul 133-792South Korea Colledge of Medicine Seoul National UniversitySeoul 110-799South Korea

AIM: To investigate the influence of the resection margin on local recurrence and survival in gastric cancer patients.

关键词： Gastric cancer Survival Recurrence Resection Margin

Difficulty of falling asleep and non-high-density lipoprotein cholesterol level among Canadian older adults:a cross-sectional analysis of the Canadian Longitudinal Study for Aging baseline data

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Journal of Geriatric Cardiology 2021年第8期18卷 597-608页

作者： Jian LIU Surim son Mike Giancaterino Miya Narushima Department of Health Sciences Brock UniversitySt.CatharinesOntarioCanada

OBJECTIVE To examine whether difficulty of falling asleep(DoFA)is associated with non-high-density lipoprotein cholesterol(non-HDL-C)level among Canadian older *** 26,954 individuals aged 45-85 years from the baseline data of the Canadian Longitudinal Study for Aging were in-cluded in this *** was categorized into five groups by answer to the question“Over the last month,how often did it take you more than 30 min to fall asleep?”Response options are“Never,<1 time/week,1−2 times/week,3−5 times/week,or 6−7 times/week”.Non-HDL-C,the difference of total cholesterol and HDL-C,were categorized into five categories based on these cut-offs(<2.6 mmol/L,2.6−3.7 mmol/L,3.7−4.8 mmol/L,4.8−5.7 mmol/L,and≥5.7 mmol/L).Ordinal logistic regression(logit link)continuation ratio models were used to estimate the odds of higher non-HDL-C levels for DoFA *** means of non-HDL-C by DoFA status were estimated by general linear *** analyses were sex separately using analytic weights to en-sure *** The proportions of DoFA in five categories were 41.6%,25.7%,13.6%,9.4%,9.7%for females and 52.9%,24.9%,10.5%,6.1%,5.6%for males,*** adjustment of demographical and other covariates(such as depression,comorbidity,sleeping hour,etc.)compared to those who reported never having DoFA,the ORs(95%CIs)of higher levels of non-HDL-C for those whose DoFA status in<1 time/week,1−2 times/week,3−5 times/week,and 6−7 times/week were 1.12(1.05−1.21),1.09(0.99−1.18),1.20(1.09−1.33),1.29(1.17−1.43)in females and 1.05(0.98−1.13),0.95(0.87−1.05),1.21(1.08−1.37),0.97(0.85−1.09)in males,*** adjusted means of non-HDL-C among the five DoFA status were 3.68 mmol/L,3.73 mmol/L,3.74 mmol/L,3.82 mmol/L,3.84 mmol/L for females and 3.54 mmol/L,3.58 mmol/L,3.51 mmol/L,3.69 mmol/L,3.54 mmol/L for males,*** The results of this study have identified a risk association pattern between DoFA status and non-HDL-C levels in females

关键词： cholesterol sectional Canadian

A stable CS-FEM for the static and seismic stability of a single square tunnel in the soil where the shear strength increases linearly with depth

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第4期14卷 1253-1265页

作者： H.C.Nguyen L.Nguyen-son Department of Civil and Environmental Engineering Imperial College LondonLondonUK Department of Civil Engineering and Industrial Design University of LiverpoolLiverpoolUK Faculty of Civil Engineering Ho Chi Minh City University of Technology(HUTECH)Ho Chi Minh CityViet Nam

A numerical procedure using a stable cell-based smoothed finite element method(CS-FEM)is presented for estimation of stability of a square tunnel in the soil where the shear strength increases linearly with *** kinematically admissible displacement fields are approximated by uniform quadrilateral elements in conjunction with the strain smoothing technique,eliminating volumetric locking issues and the singularity associated with the MohreCoulomb ***,a rich set of simulations was performed to compute the static stability of a square tunnel with different geometries and soil *** presented results are in excellent agreement with the upper and lower bound solutions using the standard finite element method(FEM).The stability charts and tables are given for practical use in the tunnel design,along with a newly proposed formulation for predicting the undrained stability of a single square ***,the seismic stability number was computed using the present numerical *** results reveal that the seismic stability number reduces with an increasing value of the horizontal seismic acceleration(a_(h)),for both cases of the weightless soil and the soil with unit ***,the link between the static and seismic stability numbers is described using corrective factors that represent reductions in the tunnel stability due to seismic *** is shown from the numerical results that the corrective factor becomes larger as the unit weight of soil mass increases;however,the degree of the reduction in seismic stability number tends to reduce for the case of the homogeneous ***,this advanced numerical procedure is straightforward to extend to three-dimensional(3D)limit analysis and is readily applicable for the calculation of the stability of tunnels in highly anisotropic and heterogeneous soils which are often encountered in practice.

关键词： Tunnels Stability Limit analysis Cell-based smoothed finite element method (CS-FEM) Second-order cone programming(SOCP)

3D printed energy devices:generation,conversion,and storage

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Microsystems & Nanoengineering 2024年第4期10卷 23-41页

作者： Jin-ho son Hongseok Kim Yoonseob Choi Howon Lee Department of Mechanical Engineering Institute of Advanced Machines and DesignSeoul National UniversitySeoulRepublic of Korea

The energy devices for generation,conversion,and storage of electricity are widely used across diverse aspects of human life and various ***-dimensional(3D)printing has emerged as a promising technology for the fabrication of energy devices due to its unique capability of manufacturing complex shapes across different length scales.3D-printed energy devices can have intricate 3D structures for significant performance enhancement,which are otherwise impossible to achieve through conventional manufacturing ***,recent progress has witnessed that 3D-printed energy devices with micro-lattice structures surpass their bulk counterparts in terms of mechanical properties as well as electrical *** existing literature focuses mostly on specific aspects of individual printed energy devices,a brief overview collectively covering the wide landscape of energy applications is *** review provides a concise summary of recent advancements of 3D-printed energy *** classify these devices into three functional categories;generation,conversion,and storage of energy,offering insight on the recent progress within each ***,current challenges and future prospects associated with 3Dprinted energy devices are discussed,emphasizing their potential to advance sustainable energy solutions.

关键词： 3D printing 3D-printed energy device Energy generation device Energy conversion device Energy storage device

Conceptual Design for a Kerosene Fuel-rich Gas-generator of a Turbopump-fed Liquid Rocket Engine

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Journal of Thermal Science 2012年第5期21卷 428-434页

作者： Min son Jaye Koo Won Kook Cho Eun Seok Lee Graduate Student Korea Aerospace UniversityGoyang Republic of Korea School of Aerospace and Mechanical Engineering Korea Aerospace UniversityGoyang Republic of Korea Korea Aerospace Research Institute Daejeon Republic of Korea

A design method for a kerosene fuel-rich gas-generator of a liquid rocket engine using turbopumps to supply propellant was performed at a conceptual level. The gas-generator creates hot gases, enabling the turbine to operate the turbopumps. A chemical non-equilibrium analysis and a droplet vaporization model were used for the estimation of the burnt gas properties and characteristic chamber length. A premixed counter-flow flame analysis was performed for the prediction of the burnt gas properties, namely the temperature, the specific heat ratio and heat capacity, and the chemical reaction time. To predict the vaporization time, the Spalding model, using a single droplet in convective condition, was used. The minimum residence time in the chamber and the characteristic length were calculated by adding the reaction time and the vaporization time. Using the characteristic length, the design methods for the fuel-rich gas-generator were established. Finally, a parametric study was achieved for the effects of the O/F ratio, mass flow rate, chamber pressure, initial droplet temperature, initial droplet diameter and initial droplet velocity.

关键词： Liquid rocket engine Conceptual design Fuel-rich gas-generator Sensitivity analysis

On Types of Isolated KKT Points in Polynomial Optimization

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Journal of Systems Science & Complexity 2023年第5期36卷 2186-2213页

作者： GUO Feng JIAO Liguo KIM Do Sang PHAM Tien-son School of Mathematical Sciences Dalian University of TechnologyDalian 116024China Academy for Advanced Interdisciplinary Studies Northeast Normal UniversityChangchun 130024China Department of Applied Mathematics Pukyong National UniversityBusan 48513South Korea Department of Mathematics Dalat UniversityDalat 96300Vietnam.

Let f be a real polynomial function with n variables and S be a basic closed semialgebraic set in R^(n).In this paper,the authors are interested in the problem of identifying the type(local minimizer,maximizer or not extremum point)of a given isolated KKT point x^(*)of f over *** this end,the authors investigate some properties of the tangency variety of f on S at x^(*),by which the authors introduce the definition of faithful radius of f over S at x^(*).Then,the authors show that the type of x^(*)can be determined by the global extrema of f over the intersection of S and the Euclidean ball centered at x^(*)with a faithful ***,the authors propose an algorithm involving algebraic computations to compute a faithful radius of x*and determine its type.

关键词： Faithful radii KKT points polynomial functions tangency varieties types