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An Optimized Deep Residual Network with a Depth Concatenated Block for Handwritten Characters Classification

Computers, Materials & Continua 2021年第7期68卷 1-28页

作者： Gibrael Abosamra hadi Oqaibi Department of Information Systems King Abdulaziz UniversityJeddah21589SA

Even though much advancements have been achieved with regards to the recognition of handwritten characters,researchers still face difficulties with the handwritten character recognition problem,especially with the advent of new datasets like the Extended Modified National Institute of Standards and Technology dataset(EMNIST).The EMNIST dataset represents a challenge for both machine-learning and deep-learning techniques due to inter-class similarity and intra-class ***-class similarity exists because of the similarity between the shapes of certain characters in the *** presence of intra-class variability is mainly due to different shapes written by different writers for the same *** this research,we have optimized a deep residual network to achieve higher accuracy *** published state-of-the-art *** approach is mainly based on the prebuilt deep residual network model ResNet18,whose architecture has been enhanced by using the optimal number of residual blocks and the optimal size of the receptive field of the first convolutional filter,the replacement of the first max-pooling filter by an average pooling filter,and the addition of a drop-out layer before the fully connected layer.A distinctive modification has been introduced by replacing the final addition layer with a depth concatenation layer,which resulted in a novel deep architecture having higher accuracy *** pure residual ***,the dataset images’sizes have been adjusted to optimize their visibility in the ***,by tuning the training hyperparameters and using rotation and shear augmentations,the proposed model outperformed the state-of-the-art models by achieving average accuracies of 95.91%and 90.90%for the Letters and Balanced dataset sections,***,the average accuracies were improved to 95.9%and 91.06%for the Letters and Balanced sections,respectively,by using a group of 5 instances of the trained models and averagin

关键词： Handwritten character classification deep convolutional neural networks residual networks GoogLeNet ResNet18 DenseNet drop-out L2 regularization factor learning rate

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High photocatalytic efficiency of spouting reactor compared with fluidized bed with top irradiation source

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Particuology 2017年第4期15卷 123-128页

作者： hadi Mansoubi Zahra Mansourpour Shohreh Fatemi School of Chemical Engineering College of Engineering University of Tehran Tehran lran

The removal of volatile organic compounds by photocatalytic degradation is one of the safest and most effective ways of removing pollutants from the air. This process is highly affected by the type of reactor, light exposure, and hydrodynamics. For scale up purposes, continuous reactors with high capacity are required for treating large amounts of feedstock. In this work, two types of reactors based on different hydrodynamics, fluidized and spouted reactors, were designed to work under light irradiation inside the reactor. The efficiency of the reactors for volatile organic compound removal from high flow rates of air under Hg lamp irradiation using N-F-TiO2 photocatalyst was investigated. The performance of the fluidized bed and spouted bed were evaluated and compared at the same weight hourly space velocity of feed stream through the reactor. The results revealed that 80% of the initial acetaldehyde was removed in the fluidized bed after about 200 min, while in the spouted bed the acetaldehyde was totally removed after about 120 min.

关键词： Spouted bed reactor Photocatalyst powder VOC removal High efficiency Fluidized bed reactor N-F TiO2

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Comparison of rectangular and circular bored twin tunnels in weak ground

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Underground Space 2019年第4期4卷 328-339页

作者： Michael Vinod hadi Khabbaz School of Civil and Environmental Engineering University of Technology Sydney(UTS)Australia

The recent innovation of a rectangular tunnel boring machine(TBM),and its use in the Hongzhuan Road tunnel underpass by the China Railway Engineering Group(CREG),has revitalized shallow depth soft soil *** paper presents the findings of a numerical study using PLAXIS to determine the surface settlements and moments produced in tunnel linings for circular and rectangular twin *** effects of the relative positions of twin tunnels,critical distances,volume losses,depths of burial,and tunnel sizes for both circular and rectangular tunnels are the key parameters of this *** results indicate that rectangular tunnels are suitable for shallow depths in weak ground as they have lesser settlement compared with circular *** is crucial for tunneling beneath important structures such as railway lines and existing ***,the maximum bending moment produced in the rectangular tunnel lining is higher than that for circular *** use of rectangular TBMs is an unconventional method in modern day tunneling;however,the analysis in this project recommends that tunnel industry engineers consider this method for shallow depth weak ground tunneling.

关键词： Twin tunnels Clay Numerical modeling Rectangular TBM

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Computer controlled measurement of spontaneous combustion in coal stockpiles of the Western Lignite Corporation, Turkey

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Journal of University of Science and Technology Beijing 2006年第2期13卷 97-101页

作者： A. hadi Ozdeniz Cem Sensogut Mining Engineering Department Selcuk University 42079 Konya Turkey Mining Engineering Department Dumlupinar University 43100 Kutahya Turkey

The spontaneous combustion event in coal stockpiles is inevitable when appropriate environmental conditions are available. The objective of a computerized measurement system is to measure temperature changes existing in a coal stockpile. In order to achieve this intention, the electrical signal conversion of temperatures sensed by 20 temperature sensors placed in certain points inside the coal stockpile, the transfer of these electrical signals into computer media by using analogue-digital conversion unit after applying necessary filterization and upgrading processes and the record of these information into a database in particular time intervals are provided. Afterwards, the diagrams of these time-temperature data are plotted. With the help of these graphs, the competent company will be able to examine the behavior of coal stockpiles in terms of spontaneous combustion and take necessary precautions against self-combustion beforehand.

关键词： spontaneous combustion coal stockpile Western Lignite Corporation resistance temperature detector

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Experimental and numerical analysis of flow over a rectangular full-width sharp-crested weir

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Water Science and Engineering 2018年第1期11卷 75-80页

作者： Ghorban Mahtabi hadi Arvanaghi Department of Water Engineering Faculty of Agriculture University of Zanjan Department of Water Engineering Faculty of Agriculture University of Tabriz

Weirs are a type of hydraulic structure, used for water level adjustment, flow measurement, and diversion of water in irrigation systems. In this study, experiments were conducted on sharp-crested weirs under free-flow conditions and an optimization method was used to determine the best form of the discharge coefficient equation based on the coefficient of determination （R2） and root mean square error （RMSE）. The ability of the numerical method to simulate the flow over the weir was also investigated using Fluent software. Results showed that, with an increase of the ratio of the head over the weir crest to the weir height （h/P）, the discharge coefficient decreased nonlinearly and reached a constant value of 0.7 for hiP 〉 0.6. The best form of the discharge coefficient equation predicted the discharge coefficient well and percent errors were within a ±5% error limit. Numerical results of the discharge coefficient showed strong agreement with the experimental data. Variation of the discharge coefficient with Reynolds numbers showed that the discharge coefficient reached a constant value of 0.7 when hiP 〉 0.6 and Re 〉 20000.

关键词： Discharge coefficient Measurement Numerical model Sharp-crested weir Weir height

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A constitutive model for evaluation of mechanical behavior of fiber-reinforced cemented sand

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Journal of Rock Mechanics and Geotechnical Engineering 2019年第2期11卷 349-360页

作者： hadi Abioghli Amir Hamidi Department of Civil Engineering School of EngineeringKharazmi University

The aim of this study is to present a constitutive model for prediction of the mechanical behavior of fiberreinforced cemented sand. For this purpose, a generalized plasticity constitutive model of sandy soil is selected and the parameters of the model are determined for three types of sandy soils using the results of triaxial tests. Next, the proposed model is developed using the existing models based on the physicomechanical characteristics of fiber-reinforced cemented sand. The elastic parameters, flow rule and hardening law of the base model are modified for fiber-reinforced cemented sand. To verify the proposed model, the predicted results are compared with those of triaxial tests performed on fiber-reinforced cemented sand. Finally, the efficiency of the proposed model is studied at different confining pressures, and cement and fiber contents.

关键词： Fiber-reinforced cemented sand Constitutive model Hardening law Flow rule

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Configuration Reusing in On-Line Task Scheduling for Reconfigurable Computing Systems

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Journal of Computer Science & Technology 2011年第3期26卷 463-473页

作者： Maisam Mansub Bassiri hadi Shahriar Shahhoseini Electrical Engineering Department Iran University of Science and Technology

Reconfigurable computing systems can be reconfigured at runtime and support partial reconfigurability which makes us able to execute tasks in a true multitasking manner. To manage such systems at runtime, a reconfigurable operating system is needed. The main part of this operating system is resource management unit which performs on-line scheduling and placement of hardware tasks at runtime. Reconfiguration overhead is an important obstacle that limits the performance of on-line scheduling algorithms in reconfigurable computing systems and increases the overall execution time. Configuration reusing （task reusing） can decrease reconfiguration overhead considerably, particularly in periodic applications or the applications in which the probability of tasks recurrence is high. In this paper, we present a technique called reusing-based scheduling （RBS）, for on-line scheduling and placement in which configuration reusing is considered as a main characteristic in order to reduce reconfiguration overhead and decrease total execution time of the tasks. Several experiments have been conducted on the proposed algorithm. Obtained results show considerable improvement in overall execution time of the tasks.

关键词： reconfigurable computing on-line scheduling configuration reusing RPU partitioning replacement manage-ment probability of recurrence

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Future meteorological drought conditions in southwestern Iran based on the NEX-GDDP climate dataset

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Journal of Arid Land 2023年第4期15卷 377-392页

作者： Sakine KOOHI hadi RAMEZANI ETEDALI Department of Water Engineering Faculty of Agriculture and Natural ResourcesImam Khomeini International UniversityQazvin 96818Iran

Investigation of the climate change effects on drought is required to develop management strategies for minimizing adverse social and economic ***,studying the future meteorological drought conditions at a local scale is *** this study,we assessed the efficiency of seven downscaled Global Climate Models(GCMs)provided by the NASA Earth Exchange Global Daily Downscaled Projections(NEX-GDDP),and investigated the impacts of climate change on future meteorological drought using Standard Precipitation Index(SPI)in the Karoun River Basin(KRB)of southwestern Iran under two Representative Concentration Pathway(RCP)emission scenarios,i.e.,RCP4.5 and *** results demonstrated that SPI estimated based on the Meteorological Research Institute Coupled Global Climate Model version 3(MRI-CGCM3)is consistent with the one estimated by synoptic stations during the historical period(1990-2005).The root mean square error(RMSE)value is less than 0.75 in 77%of the synoptic *** have high uncertainty in most synoptic stations except those located in the *** the average of a few GCMs to improve performance and reduce uncertainty is suggested by the *** results revealed that with the areas affected by wetness decreasing in the KRB,drought frequency in the North KRB is likely to increase at the end of the 21st century under RCP4.5 and RCP8.5 *** the seasonal scale,the decreasing trend for SPI in spring,summer,and winter shows a drought tendency in this *** climate-induced drought hazard can have vast consequences,especially in agriculture and rural ***,an increasing trend in drought during the growing seasons under RCP scenarios is vital for water managers and farmers to adopt strategies to reduce the *** results of this study are of great value for formulating sustainable water resources management plans affected by climate change.

关键词： climate change meteorological drought Global Climate Models(GCMs) Standard Precipitation Index(SPI) Representative Concentration Pathway(RCP) NASA Earth Exchange Global Daily Downscaled Projections(NEX-GDDP) southwestern Iran

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Parametric study on the mixed solvent synthesis of ZIF-8 nano- and micro-particles for CO adsorption: A response surface study

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Frontiers of Chemical Science and Engineering 2020年第4期14卷 579-594页

作者： Alireza hadi Javad Karimi-Sabet Abolfazl Dastbaz Department of Chemical Engineering Faculty of EngineeringUniversity of TehranTehranIran Material and Nuclear Fuel Research School(MNFRS) Nuclear Science and Technology Research InstituteTehranIran

The room temperature synthesis of ZIF-8 micro-and nano-particles was investigated using a mixed methanol-water solvent ***-8 particles of good quality and high crystallinity were *** surface methodology was used to determine the effect of the synthesis conditions on the ZIF-8 yield,particle size distribution,and mean particle *** ligand/metal salt molar ratio followed by the amount of sodium formate(the deprotonating agent)and then the amount of water(i.e,the composition of the mixed solvent)respectively had the largest effects on both the ZIF-8 yield and particle *** showed that mixing of solvents with different strengths in producing ZIF-8 crystals is a practical method to size-controlled synthesis of ZIF-8 *** method is more favorable for industrial-scale ZIF-8 synthesis than using excess amounts of ligands or chemical additives(like sodium formate).In addition,ZIF-8 samples with different mean particle sizes(100,500,and 1000 nm)were used for CO adsorption and the mid-sized ZIF-8 particles had the highest adsorption capacity.

关键词： metal organic frameworks zeolitic imidazo-late frameworks ZIF-8 response surface methodology Box Behnken design CO adsorption

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Contact Stress Distribution of a Pear Cam Profile with Roller Follower Mechanism

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Chinese Journal of Mechanical Engineering 2021年第1期34卷 266-279页

作者： Louay S.Yousuf Nabil Hassan hadi Department of Mechanical Engineering San Diego State University5500 Campanile DriveSan DiegoCA 92182-1323USA Aeron autical Fngineering Department College of FngineeringUniversity of BaghdadBaghdadIraq

The problem of this paper is the high contact stress at the point of contact between the cam and the follower.A pear cam and roller follower mechanism were studied and analyzed for different position of the follower and different contact compression *** objective of this paper is to study the effect of contact compression load on the contact stress distribution of the cam profile at the point of *** different positions of the follower with the cam was considered(0°,90°,180°,and 270°).The theory of circular plate was applied to derive the analytic solution of the contact *** numerical simulation had been done using ANSYS Ver.19.2 package to determine the contact stress,while SolidWorks software was used to investigate follower displacement,velocity,and *** distinct values of the compression contact load,such as 3.121 N,6.242 N,9.364 N,and 12.485 N,were used in the numerical *** the experiment setup,a photo-elastic technique was carried out in the field of polarized light to exhibit the stress distribution on the cam *** annealed PSM-4 backalate material was used in the experiment *** experimental value of contact stress was checked and verified analytically and numerically at the point of *** innovation in this paper the use of spring-damper system which reduce the value of contact stress at the point of *** contact stress was maximum 2.136 MPa when the follower located at 270°with the cam,while the contact stress was minimum 1.802 MPa when the follower located at 180°at compression load 12.485 N.

关键词： Contact stress Compression load Bending deflection Photo-elastic technique Finite element analysis

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