Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons™

Open Access. Powered by Scholars. Published by Universities.®

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 53731 - 53760 of 197219

Full-Text Articles in Engineering

Non-Dependent Cubic Spline Function And Its Use In Digital Processing Of Signs, H.N. Zaynidinov, S.A. Bakhromov, B.R. Azimov, N.H. Sadritdinov Nov 2020

Non-Dependent Cubic Spline Function And Its Use In Digital Processing Of Signs, H.N. Zaynidinov, S.A. Bakhromov, B.R. Azimov, N.H. Sadritdinov

Chemical Technology, Control and Management

This paper proposes a method of constructing cubic spline functions of a local character with equal distances between nodes. Previous studies have shown precise models for the digital processing of signals using interpolated cubic splines, with accurate examples showing the high degree of accuracy of the approximation of interpolated functions. In this study, the size of the calculations required to find the parameters to be determined during the construction of the spline function does not depend on the number of node points. Local-based splines are used to build such spline functions. Digital processing of the gastroenterological signal was performed on …

Go to article

Optimization Of Identification Under The Conditions Of Low Reliability Of Information And Parametric Uncertainty Of Non-Stationary Objects, Isroil Ibragimovich Jumanov, Sunatillo Maxmudovich Kholmonov Nov 2020

Optimization Of Identification Under The Conditions Of Low Reliability Of Information And Parametric Uncertainty Of Non-Stationary Objects, Isroil Ibragimovich Jumanov, Sunatillo Maxmudovich Kholmonov

Chemical Technology, Control and Management

Constructive approaches, principles, and methods of optimization of identification in conditions of a priori insufficiency, parametric uncertainty, nonstationarity, low accuracy of data processing have been developed based on the use of natural information redundancy of random time series (RTS) and nonstationary objects in control systems of industrial and technological complexes. A technique has been developed for the accelerated computation of statistical parameters with insufficient statistics. The mechanisms of threshold control of values of elements of RTS, control of increments of the sequence of elements of RTS, inaccuracies of predictions for various models of identification of RTS are proposed. Received general …

Go to article

Analysis Of The Special Features Of The Process Of Kaolin's Enrichment With The Purpose Of Modeling, Guljamila Rasbergenovna Kaipbergenova, Aydos Turdimuratovich Atamuratov, Aral Bisenbaevich Allanazarov Nov 2020

Analysis Of The Special Features Of The Process Of Kaolin's Enrichment With The Purpose Of Modeling, Guljamila Rasbergenovna Kaipbergenova, Aydos Turdimuratovich Atamuratov, Aral Bisenbaevich Allanazarov

Chemical Technology, Control and Management

In this work there is studied the increase in the demand of the national economy of the Republic of Uzbekistan for high-quality kaolin for various purposes requires finding new, non-traditional ways of enriching it. The aim of the work is to collect and process existing mathematical models of the kaolin enrichment process, taking into account the features of the modeling object. At the same time, it is necessary to refine the details of the technological regulations, normative and technical documentation, and develop adequate mathematical models of technological processes.

Go to article

Loading Characteristic Of Contactless Induction Wide-Range High Current Converters Of Control And Control Systems, A.M. Plakhtiev, G.A. Gaziev, O.Ch. Doniyorov, D.Sh. Norxolboyev, Y.A. Meliboev Nov 2020

Loading Characteristic Of Contactless Induction Wide-Range High Current Converters Of Control And Control Systems, A.M. Plakhtiev, G.A. Gaziev, O.Ch. Doniyorov, D.Sh. Norxolboyev, Y.A. Meliboev

Chemical Technology, Control and Management

The article substantiates the need to use for the needs of industry and metallurgy, land reclamation, irrigation and, in general, agriculture and water management of non-contact conversion and measurement of large direct currents using non-destructive induction wide-range converters of high currents of monitoring and control systems - magnetomodulation non-contact ferromagnetic converters of increased sensitivity, the results are given their constructive development. It is shown that the developed converter, in contrast to the known ones, has increased accuracy and sensitivity, a technologically advanced design and small weight and dimensions with low material consumption and cost. Its load characteristic is investigated under …

Go to article

Uncertainty Of A Manometric Method For Determining The Humidity Of Fibrous Materials, O.Sh. Khakimov, N.Sh. Muminov, J.A. Hamidov Nov 2020

Uncertainty Of A Manometric Method For Determining The Humidity Of Fibrous Materials, O.Sh. Khakimov, N.Sh. Muminov, J.A. Hamidov

Chemical Technology, Control and Management

A manometric method for determining the moisture content of fibrous materials is considered. The scheme and principle of operation of the device. A formula is given for calculating the moisture content of a material. It is emphasized that the two-chamber manometric method for determining the moisture content of materials is an indirect measurement. To determine the measurement result and its uncertainty, it is necessary to justify and choose one of the appropriate methods for determining the measurement results and assess their uncertainty - the linearization method or the reduction method. The main sources of uncertainty are identified. The pairwise correlation …

Go to article

Intelligence Devices For Monitoring And Control Of Energy Efficiency Of Enterprices, N.N. Mirzoyev Nov 2020

Intelligence Devices For Monitoring And Control Of Energy Efficiency Of Enterprices, N.N. Mirzoyev

Chemical Technology, Control and Management

In the presented article discussed development of information software and intelligent measurement systems for the management and control of energy efficiency, demand for energy efficiencyб growing intelligent energy metering and monitoring systems are being developed, and new opportunities, opening up for assessing of energy efficiency of an enterprise.

Go to article

Functional Structure Of The Advising Expert System "Defect-Cause-Action", Marat Rakhmatullaev Nov 2020

Functional Structure Of The Advising Expert System "Defect-Cause-Action", Marat Rakhmatullaev

Chemical Technology, Control and Management

To solve some technological tasks, developers face a number of problems of formalization, modeling and management of production processes. Especially often difficulties arise when solving problems of detecting and eliminating defects. This is due to the fact that the same defects can appear for different reasons or for a set of reasons; one reason can lead to defects of different types; different values of the cause indicators can cause different defects; the complex of various causes that caused the appearance of certain defects can be eliminated by many combinations of actions taken in this case; the reasons for the appearance …

Go to article

Information-Algorithmic System Of Technological Monitoring By The Parameters Of Continuous Productions, S.T. Yunusova, M.O. Atajonov Nov 2020

Information-Algorithmic System Of Technological Monitoring By The Parameters Of Continuous Productions, S.T. Yunusova, M.O. Atajonov

Chemical Technology, Control and Management

Modern industrial enterprises are characterized by large volumes, complexity and interconnectedness of streams of operational and static information about the technological process. The process of its accumulation and processing is one of the most important in accounting, control of functioning and production management, which leads to the creation of an integrated information database to automate the solution of management problems. To solve this problem, it is proposed to create an information-algorithmic system for technological monitoring of production processes. In the conditions of complexity, dynamism and indistinctness of the characteristics of production processes in industrial enterprises, the development and accumulation of …

Go to article

Fuzzy Model Of Compliance With Hydro-Unit Defection, T.S. Nusratov, B.Sh. Abdullaev, S.Kh. Nabiev Nov 2020

Fuzzy Model Of Compliance With Hydro-Unit Defection, T.S. Nusratov, B.Sh. Abdullaev, S.Kh. Nabiev

Chemical Technology, Control and Management

The requirement of reliability and safety of hydraulic systems is always relevant: both in the design process, and in the operation, repair and monitoring processes. Currently, systems designed to support decision-making processes, in particular situational-advising systems, as a type of expert systems, are becoming particularly relevant. The main components of the formalization and construction of fuzzy situational models of correspondences of the type “situation - causes - actions” (S-C-A) for the processes of defect detection of a hydraulic unit are described.

Go to article

Imitation Modeling The Discrete Communication Chanel In Matlab Stateflow On Basis Of Petrovich Model, Sh.Y. Djabborov, Sh.K. Ismailov, I.I. Omonov Nov 2020

Imitation Modeling The Discrete Communication Chanel In Matlab Stateflow On Basis Of Petrovich Model, Sh.Y. Djabborov, Sh.K. Ismailov, I.I. Omonov

Chemical Technology, Control and Management

The article defines the study of a discrete communication channel based on the Petrovich model, amending the faults and its simulation model using MATLAB software. In addition, to reduce the probability of multiple errors in data transmission, coding the discrete channel up to a fault tolerance level, to investigate the distribution of error-free transmission intervals in the discrete channel based on the Petrovich model, to construct the Petrovich model for the discrete channel, The State-flow diagram of Petrovich model is presented for the under research discrete channel. The processes meant by the article save real-time mode of technical engineers in …

Go to article

Research Of The Characteristics Of The Information Stream Transmission Channel Based On A Hybrid Neural Network, Z.Z. Nigmatov, Sh.S. Karimov Nov 2020

Research Of The Characteristics Of The Information Stream Transmission Channel Based On A Hybrid Neural Network, Z.Z. Nigmatov, Sh.S. Karimov

Chemical Technology, Control and Management

The article describes a hybrid algorithm for tuning parameters of a neural network based on sigma-pi neurons. The process of controlling an algorithm based on a hybrid neural network is considered. The use of an integrated training approach for neural networks built on the basis of sigma-pi neurons makes it possible to train them in the time required to configure the neural network to solve an applied problem. The possibility of using a sigma-pi network to estimate the parameters of the information transmission channel based on the analysis of the spectrum of the reflected sounding signal is considered. To form …

Go to article

Usage And Awareness Of Cloud Computing Applications By Library Professionals Of Sindh Province, Liaquat Ali Rahoo Nov 2020

Usage And Awareness Of Cloud Computing Applications By Library Professionals Of Sindh Province, Liaquat Ali Rahoo

Library Philosophy and Practice (e-journal)

The aim of the study is examine the usage and awareness level of cloud computing applications by library professionals of Sindh province. Methods- This study was quantitative survey based. The population of the study was library professionals who are working in different types of libraries likewise academic, special and community libraries of Sindh province. Sampling technique was random simple sample size was 165 library professionals (library assistant, assistant librarian, deputy librarian, librarian. Questionnaire was prepared in google form and distributed by email to selected respondents. Results- The result declared that knowledge and awareness of library professionals regarding cloud …

Go to article

Version 2 Ozone Monitoring Instrument So2 Product (Omso2 V2): New Anthropogenic So2 Vertical Column Density Dataset, Can Li, Nickolay A. Krotkov, Peter J.T. Leonard, Simon Carn, Joanna Joiner, Robert J.D. Spurr, Alexander Vasilkov Nov 2020

Version 2 Ozone Monitoring Instrument So2 Product (Omso2 V2): New Anthropogenic So2 Vertical Column Density Dataset, Can Li, Nickolay A. Krotkov, Peter J.T. Leonard, Simon Carn, Joanna Joiner, Robert J.D. Spurr, Alexander Vasilkov

Michigan Tech Publications, Part 1

The Ozone Monitoring Instrument (OMI) has been providing global observations of SO2 pollution since 2004. Here we introduce the new anthropogenic SO2 vertical column density (VCD) dataset in the version 2 OMI SO2 product (OMSO2 V2). As with the previous version (OMSO2 V1.3), the new dataset is generated with an algorithm based on principal component analysis of OMI radiances but features several updates. The most important among those is the use of expanded lookup tables and model a priori profiles to estimate SO2 Jacobians for individual OMI pixels, in order to better characterize pixel-to-pixel variations in SO2 sensitivity including over …

Go to article

Influence Of Fiberboard Container Design On Compression Bulge Displacement, Koushik Saha, Shane Messner, John Dizon, Nirav Chhajed, Jay Singh Nov 2020

Influence Of Fiberboard Container Design On Compression Bulge Displacement, Koushik Saha, Shane Messner, John Dizon, Nirav Chhajed, Jay Singh

Journal of Applied Packaging Research

Bulge effect is the out-of-plane displacement of a panel of a corrugated fiberboard box from its original position. This bulge effect often is the result of excessive weight being placed on a box that rests at the bottom of a palletized load. Panels that are out-of-plane reduce the stacking strength of the box and can result in damage to products inside the containers. This study was designed to find the influence of fiberboard container design on its bulging performance when under compression. The objective of the study was to determine if change in height of a regular slotted container will …

Go to article

Parameter Identification For Cells, Modules, Racks, And Battery For Utility-Scale Energy Storage Systems, Oluwaseun M. Akeyo, Vandana Rallabandi, Nicholas Jewell, Aron Patrick, Dan M. Ionel Nov 2020

Parameter Identification For Cells, Modules, Racks, And Battery For Utility-Scale Energy Storage Systems, Oluwaseun M. Akeyo, Vandana Rallabandi, Nicholas Jewell, Aron Patrick, Dan M. Ionel

Electrical and Computer Engineering Faculty Publications

The equivalent circuit model for utility-scale battery energy storage systems (BESS) is beneficial for multiple applications including performance evaluation, safety assessments, and the development of accurate models for simulation studies. This paper evaluates and compares the performance of utility-scale equivalent circuit models developed at multiple sub-component levels, i.e. at the rack, module, and cell levels. This type of modeling is used to demonstrate that the equivalent circuit model for a reference cell, module, or rack of a BESS can be scaled to represent the entire battery system provided that the battery management system (BMS) is active and functional. Contrary to …

Go to article

Comparative Analyses Of Variable And Fixed Rate Irrigation And Nitrogen Management For Maize In Different Soil Types: Part I. Impact On Soil-Water Dynamics And Crop Evapotranspiration, Vasudha Sharma, Suat Irmak Nov 2020

Comparative Analyses Of Variable And Fixed Rate Irrigation And Nitrogen Management For Maize In Different Soil Types: Part I. Impact On Soil-Water Dynamics And Crop Evapotranspiration, Vasudha Sharma, Suat Irmak

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Understanding the soil-water dynamics and maize evapotranspiration (ETc) under variable rate irrigation (VRI) and variable rate fertigation (VRF) management with respect to soil spatial variability constitutes the basis for developing effective variable rate water and nitrogen management strategies. This long-term research was designed to quantify and compare the soil-water dynamics, including available water (AW), and ETc during vegetative and reproductive growth periods of VRI, fixed rate irrigation (FRI) and no-irrigation (NI) under fixed rate fertigation (FRF), VRF and pre-plant (PP) nitrogen management in three different soil types [Crete silt loam (S1); Hastings silty clay loam (S2) and Hastings silt loam …

Go to article

Machine Learning Augmentation Micro-Sensors For Smart Device Applications, Mohammad H. Hasan Nov 2020

Machine Learning Augmentation Micro-Sensors For Smart Device Applications, Mohammad H. Hasan

Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research

Novel smart technologies such as wearable devices and unconventional robotics have been enabled by advancements in semiconductor technologies, which have miniaturized the sizes of transistors and sensors. These technologies promise great improvements to public health. However, current computational paradigms are ill-suited for use in novel smart technologies as they fail to meet their strict power and size requirements. In this dissertation, we present two bio-inspired colocalized sensing-and-computing schemes performed at the sensor level: continuous-time recurrent neural networks (CTRNNs) and reservoir computers (RCs). These schemes arise from the nonlinear dynamics of micro-electro-mechanical systems (MEMS), which facilitates computing, and the inherent ability …

Go to article

Radiation Modified Chitosan/Polyvinyl Alcohol Film With Polyvinyl Pyrrolidone Coating For Heavy Metal Ion Removal, Norhashidah Talip Nov 2020

Radiation Modified Chitosan/Polyvinyl Alcohol Film With Polyvinyl Pyrrolidone Coating For Heavy Metal Ion Removal, Norhashidah Talip

Student Works (2020-2029)

Chitosan (CS) / Polyvinyl Alcohol (PVA) films were obtained by solution casting method. To be used in the water treatment application, these film need to be improved in mechanical strength. In this study, 2% (w/v) chitosan and 5% (w/v) PVA were blend at different CS: PVA weight ratios (50:50, 70:30 and 90:10). These mixtures were then transformed into films by solution casting method. Mechanical properties of the films were evaluated using tensile strength test where, at 70:30 of CS: PVA ratio gave the best tensile strength. Therefore, this composition was selected to proceed with the radiation modification with Polyvinyl Pyrrolidone …

Go to article

Examination Of Early Stage Grey Iron Solidification Through The Development Of Fast-Quench Methodology, James C. Liggett Nov 2020

Examination Of Early Stage Grey Iron Solidification Through The Development Of Fast-Quench Methodology, James C. Liggett

Honors College Theses

As grey iron casting accounts for a significant share of the foundry industry, proper understanding of the effects of solidification and growth mechanisms on the mechanical properties of grey iron is crucial. Prior experimentation has been performed examining early stage solidification and growth of the carbon phase of ductile iron, in which rapid quench samples are obtained which detail austenite-graphite interactions during solidification. This prior experimentation is built upon in though this research and applied to examine the early stage growth of flake graphite in grey iron. The purpose of this research is to validate a proposed fast-quench method by …

Go to article

An Investigative Study Of Combustion And Emissions With Noise And Vibrations Of Synthetic Fuels Within An Aero-Gas Turbine, Camille J. Phillips Nov 2020

An Investigative Study Of Combustion And Emissions With Noise And Vibrations Of Synthetic Fuels Within An Aero-Gas Turbine, Camille J. Phillips

Honors College Theses

The pollution from the aerospace transportation is rapidly becoming the largest source of greenhouse gas (GHG) emissions. The FAA expects aviation emissions to almost triple by 2050, making the aerospace industry responsible for the release of approximately 25% of the global carbon dioxide budget. These aviation emissions, including CO2 and NOx, as well as other GHGs, contribute to the destruction of ozone layer. Carbon dioxide emissions have a particularly negative effect on humans, leading to airway diseases especially in children and elderly. To combat the addition of further GHG emissions into the atmosphere, it is necessary to minimize the usage …

Go to article

Editorial: Carbon- And Inorganic-Based Nanostructures For Energy Applications, Federico Cesano, M. Jasim Uddin, Yuanbing Mao, Muhammad N. Huda Nov 2020

Editorial: Carbon- And Inorganic-Based Nanostructures For Energy Applications, Federico Cesano, M. Jasim Uddin, Yuanbing Mao, Muhammad N. Huda

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Chemistry)

No abstract provided.

Go to article

Laser Powder Bed Fusion Of Nitihf High-Temperature Shape Memory Alloy: Effect Of Process Parameters On The Thermomechanical Behavior, Mohammadreza Nematollahi, Guher P. Toker, Keyvan Safaei, Alejandro Hinojos, S. Ehsan Saghaian, Othmane Benafan, Michael J. Mills, Haluk E. Karaca, Mohammad Elahinia Nov 2020

Laser Powder Bed Fusion Of Nitihf High-Temperature Shape Memory Alloy: Effect Of Process Parameters On The Thermomechanical Behavior, Mohammadreza Nematollahi, Guher P. Toker, Keyvan Safaei, Alejandro Hinojos, S. Ehsan Saghaian, Othmane Benafan, Michael J. Mills, Haluk E. Karaca, Mohammad Elahinia

Mechanical Engineering Faculty Publications

Laser powder bed fusion has been widely investigated for shape memory alloys, primarily NiTi alloys, with the goal of tailoring microstructures and producing complex geometries. However, processing high temperature shape memory alloys (HTSMAs) remains unknown. In our previous study, we showed that it is possible to manufacture NiTiHf HTSMA, as one of the most viable alloys in the aerospace industry, using SLM and investigated the effect of parameters on defect formation. The current study elucidates the effect of process parameters (PPs) on the functionality of this alloy. Shape memory properties and the microstructure of additively manufactured Ni-rich NiTiHf alloys were …

Go to article

Under Impact Of Non-Motor Vehicle Violation An Analysis On Vehicle Operation Efficiency, Sun Di, Zhou Jin, Sijia Liu, Xiaoming Zhang, Xueying Gao Nov 2020

Under Impact Of Non-Motor Vehicle Violation An Analysis On Vehicle Operation Efficiency, Sun Di, Zhou Jin, Sijia Liu, Xiaoming Zhang, Xueying Gao

Journal of System Simulation

Abstract: In order to study the impact of non-motor vehicle violations on motor vehicle traffic efficiency at signalized intersections, the non-motor vehicle traffic behaviors are analyzed. An actual intersection is selected as study object, the main violation behaviors of on selected intersection are analyzed by using the linear regression model. For traffic light violation behavior of non-motor vehicles, the violation rate is modeled by using logistic model, and the results are analyzed. At the signal controlled intersection, non-motor vehicle violations affect the normal motor vehicles, and time is delayed. The delay time of motor vehicle under non-motor vehicle …

Go to article

Time-Varying Parameter System Modeling Method Based On Zonotope-Ellipsoid Double Filtering, Ziyun Wang, Peiyu Wang, Yacong Zhan Nov 2020

Time-Varying Parameter System Modeling Method Based On Zonotope-Ellipsoid Double Filtering, Ziyun Wang, Peiyu Wang, Yacong Zhan

Journal of System Simulation

Abstract: The traditional system modeling method using zonotopes as the feasible parameter sets islikely to increase the computational complexity of the algorithm due to the increasing dimensions of the zonotope shape matrix. This paper proposes a time-varying parameter modeling systems method based on zonotope-ellipsoid double filtering technique. Considering the time-varying parameters, a zonotope with the minimum volume is obtained during the iterations of the intersection with the constraint strip. After transforming the shape matrix of the zonotope, the dimensionality reduction is performed, instead of directly finding the row sum of the extended shape matrix, to reduce the algorithm conservativeness originated …

Go to article

Research On Configurable Simulation Integration Technology For Equipment Software, Yuanyuan Wang, Yuxin Duan, Guangzhao Song Nov 2020

Research On Configurable Simulation Integration Technology For Equipment Software, Yuanyuan Wang, Yuxin Duan, Guangzhao Song

Journal of System Simulation

Abstract: The problems of the traditional distributed digital simulation system are analyzed. The method of constructing the digital simulation system based on the equipment software is studied. The configurable simulation integration middleware is designed. The overall structure of the configurable middleware is designed and the design ideas of each module are briefly summarized. An example of a digital simulation system with networked transformation of equipment shows that the middleware can be effectively and flexibly configured and can provide support for constructing digital simulation system with software, which can be promoted and used in other simulation systems.

Go to article

Research On Multi-Objective Optimization Method Based On Model, Jianjun Liu, Guangya Si, Yanzheng Wang, Dachuan He Nov 2020

Research On Multi-Objective Optimization Method Based On Model, Jianjun Liu, Guangya Si, Yanzheng Wang, Dachuan He

Journal of System Simulation

Abstract: There is a model-based algorithm for the optimization of multiple objective functions by means of black-box evaluation is proposed. The algorithm iteratively generates candidate solutions from a mixture distribution over the solution space and updates the mixture distribution based on the sampled solutions’ domination count, such that the future search is biased towards the set of Pareto optimal solutions. The proposed algorithm seeks to find a mixture distribution on the solution space so that each component of the mixture distribution is a degenerate distribution centered at a Pareto optimal solution and each estimated Pareto optimal solution is uniformly spread …

Go to article

Research And Application Of A Lightweight Real-Time Human Posture Detection Model, Hongkun Zhu, Jiawei Yin, Wenyu Feng, Hua Liang, Minrui Fei, Kun Zhang Nov 2020

Research And Application Of A Lightweight Real-Time Human Posture Detection Model, Hongkun Zhu, Jiawei Yin, Wenyu Feng, Hua Liang, Minrui Fei, Kun Zhang

Journal of System Simulation

Abstract: The traditional OpenPose model has good accuracy but slow speed in human posture detection. In order to accelerate the detection speed and reduce the model on condition of the detection precision, based on the traditional OpenPose model, the residual network with second-order term fusion is used to extract the low-level features, the weights of the trained model are pruned by the L1 norm weight, and an improved OpenPose model is proposed. Experiments show that when the detection accuracy is approximately equal to original model, the model size reduces to about 8%, the parameters reduces by nearly 83%, and the …

Go to article

Construction And Test Method Of A Semi-Physical Simulation System For Laser Driving Guidance Weapon, Zhang Xiang, Mengyan Liu, Zhang Peng, Kewei Zhu, Xiaodong Yan Nov 2020

Construction And Test Method Of A Semi-Physical Simulation System For Laser Driving Guidance Weapon, Zhang Xiang, Mengyan Liu, Zhang Peng, Kewei Zhu, Xiaodong Yan

Journal of System Simulation

Abstract: To achieve the previous semi-physical simulation of the laser beam-guided weapon, the two-dimensional translation system must be used. But the technical index of the two-dimensional translation system is not high enough to meet the requirements of the relative motion simulation speed and acceleration of the projectile. To solve the problem, a new method and test method for the semi-physical simulation system of laser driving guidance weapon is proposed. The “two-axis turret + load bracket” simulation system construction method is adopted to replace the linear motion of the two-dimensional translation system by the rotational angular motion of the …

Go to article

Two Gd Atoms Adsorbed On Zigzag Graphene Nanoribbon:A First-Principles Study, Weifeng Xie, Zuo Xu Nov 2020

Two Gd Atoms Adsorbed On Zigzag Graphene Nanoribbon:A First-Principles Study, Weifeng Xie, Zuo Xu

Journal of System Simulation

Abstract: A giant Rashba-type spin splitting is highly critical for the application of spintronics, but one-dimensional magnetic systems are rarely involved. In order to explore the characteristics and strength of Rashba effect in one-dimensional magnetic systems, two Gd atoms adsorbed on Zigzag graphene nanoribbon system is proposed. The characteristics and strength of the Rashba effect in different magnetization directions and the magnetic anisotropy of the system are analyzed through the first-principles calculations. The results show that the antiferromagnetic ground state system has strong Rashba strength and out-of-plane magnetic anisotropy. In addition, the Rashba effect in magnetic system needs to …

Go to article

Generalized Zero-Inflated Binomial Distribution Model Aimed At Air Quality Data Analysis, Benyue Su, Pengpeng Xu, Sheng Min Nov 2020

Generalized Zero-Inflated Binomial Distribution Model Aimed At Air Quality Data Analysis, Benyue Su, Pengpeng Xu, Sheng Min

Journal of System Simulation

Abstract: For the problem of the quality monitoring and counting of excessive gas emissions in chemical industry parks, a generalized zero-inflated binomial distribution model is constructed. Statistics show that the times of number of excessive gas emissions has a typical zero-inflated feature. The traditional zero-inflated Poisson model and negative binomial regression model and so on will underestimate the probability of zero inflation. A generalized zero-inflated binomial distribution model is constructed by extending the traditional binomial regression model to a more general form. This model satisfies the characteristic that the expectation is less than the variance, and better solves the problems …

Go to article

First Prev Next Last