Graphical Environment Research Articles

Heavy commercial vehicle yaw control simulation

The aim of this article is to present universal multibody dynamic model of the heavy commercial vehicle equipped with direct yaw moment control system. The presented simulation method is based on interconnection of the multibody software ADAMS and the graphical programming environment MATLAB Simulink. The main task is to demonstrate the potential effects of the direct yaw moment control using an active differential by heavy commercial vehicle with rear wheel drive.

Facilitating insights with a user adaptable dashboard, illustrated by airport connectivity data

Abstract. Since the movement data exist, there have been approaches to collect and analyze them to get insights. This kind of data is often heterogeneous, multiscale and multi-temporal. Those interested in spatio-temporal patterns of movement data do not gain insights from textual descriptions. Therefore, visualization is required. As spatio-temporal movement data can be complex because size and characteristics, it is even challenging to create an overview of it. Plotting all the data on the screen will not be the solution as it likely will result into cluttered images where no data exploration is possible. To ensure that users will receive the information they are interested in, it is important to provide a graphical data representation environment where exploration to gain insights are possible not only in the overall level but at sub-levels as well. A dashboard would be a solution the representation of heterogeneous spatio- temporal data. It provides an overview and helps to unravel the complexity of data by splitting data in multiple data representation views. The adaptability of dashboard will help to reveal the information which cannot be seen in the overview.

A Methodology for the Creation of an Integrated Graphical Environment for Computer Modeling of Energy Pipeline Systems

A Methodology for the Creation of an Integrated Graphical Environment for Computer Modeling of Energy Pipeline Systems

NeuroSpike viewer: A graphical environment for efficient control, communication and display of large-scale real-time simulation of Spiking Neural Networks on embedded systems

In recent years, the scientific community's interest for developing software or hardware tools capable of processing and displaying real-time simulations of large-scale Spiking Neural Networks (SNN) has been growing exponentially. Visualization of the simulations is crucial to observe and study the dynamics of the SNN, because these models involve high level of biological realism by encoding spatial-temporal information into action potentials or spikes like biological neurons do. Existing tools are based on supercomputers or customized neuromorphic architectures to compute large-scale SNN models. However, many of them are unsuitable to carry out real-time analysis of large scale SNN with minimal cost as large amount of complex data needs to be processed and displayed at the same time. This work intends to provide an efficient cost effective and power efficient emulation tool based on hardware-software hybrid to process, control, and display large-scale SNN network behavior in real time. The solution consists of a customized hardware architecture that computes the neural-synaptic parameters and a software environment that displays the same on the screen of a general purpose computer (Host). The data to be visualized is transferred to the host through high speed Ethernet link. The proposed solution tailors the use of the Ethernet link bandwidth to an optimum such that the customized neuromorphic architecture and the host computer duo can be used to visualize the dynamics of SNN network of any size in real-time. The hardware and software platforms are scalable in terms of number of neurons and synapses. This solution gives flexibility to the user to visualize and analyze SNN network of any size avoiding saturation of the high-speed serial Ethernet link while supporting the visualization of SNN dynamics with a good screen resolution.

A New Method to get the LVEF Reference Values of the Healthy Adult Male by Heart Rate and Geographical Environment Factors

Summary Background Finding a new method to get the Chinese healthy adult male LVEF reference values with heart rate & geo graphical environment factors. It is more accurate and simpler while considering different areas and individual differences. Methods Collecting 3502 cases from more than 44 cities healthy adult male LVEF reference values and heart rate reference values (X1) within 10 years published articles in CNKI. A correlation analysis and ridge regression were employed to extract dependent geographical environment factors and predict the reference values of LVEF. The Kriging interpolation of geostatistical analysis were developed to reveal the spatial distribution characteristics of the LVEF values. Results It has a correlation between LVEF and heart rate (X1)& geographical environment factors. The ridge regression equation of LVEF reference values and geographical environment factors is formula(1). The equation of LVEF reference values with heart rate and geographical environment factors is formula(2). Conclusion The Chinese healthy adult male LVEF distribution showed a downward trend from south to north. Some geographical environment factors have impact on LVEF reference values including latitude, annual precipitation amount and mean air temperature distribution. LVEF is negative correlation with heart rate. When geographical environment factors and individual's heart rate are known, the local and individual's LVEF reference values can be derived from the formulas.

A general approach to generate random variates for multivariate copulae

SummaryWe suggest two methods for simulating from a multivariate copula in an arbitrary dimension. Although our main emphasis in this paper is on multivariate extreme value distributions, the proposed methods can be applied to any copula. The basic idea is to approximate the (unknown) density of the copula by a distribution that has a piece‐wise constant (histogram) density. This is achieved by partitioning the support of a given copula C into a large number of hyper‐rectangles and using them to generate random variates from an approximation of the copula. We suggest two methods for finding this approximation which correspond to either finding hyper‐rectangles which have equal probability mass with respect to C, or determining a partition using hyper‐squares of equal volume and finding the corresponding probability mass of each hyper‐square. We also discuss how the generated random variates can be used as proposals in a Metropolis–Hastings algorithm, when C is an absolutely continuous distribution function, to generate a sequence of random variates from C. An implementation of the proposed methodologies is provided for the statistical computing and graphics environment R in our package called SimCop.

Platform for Automated Real-Time High Performance Analytics on Medical Image Data.

Biomedical data are quickly growing in volume and in variety, providing clinicians an opportunity for better clinical decision support. Here, we demonstrate a robust platform that uses software automation and high performance computing (HPC) resources to achieve real-time analytics of clinical data, specifically magnetic resonance imaging (MRI) data. We used the Agave application programming interface to facilitate communication, data transfer, and job control between an MRI scanner and an off-site HPC resource. In this use case, Agave executed the graphical pipeline tool GRAphical Pipeline Environment (GRAPE) to perform automated, real-time, quantitative analysis of MRI scans. Same-session image processing will open the door for adaptive scanning and real-time quality control, potentially accelerating the discovery of pathologies and minimizing patient callbacks. We envision this platform can be adapted to other medical instruments, HPC resources, and analytics tools.

Nanostructural characterization and sorption isotherm analysis of spray-dried date powder

ABSTRACTDates are naturally rich in antioxidants and other bioactive molecules. To enhance the shelf life and market value of these bioactive molecules, free flow spray-dried date powder was produced in a pilot scale spray drier. To better understand the rheological properties of the spray-dried date powder produced by different carrier materials (maltodextrin (MD) and gum Arabic (GA)), different drying temperatures (150 and 170°C) and different flow rates of the atomizer (25 and 40 mL/min), a microstructural characterization of the scanning electron microscopy images of the date powder was performed using the graphical user interface design environment and image analysis toolbox in MATLAB. Also, the fundamental rheological characteristics of deformation and flow of particulate solids (i.e., packing, permeability, and strength) were obtained using an advanced rheometer and helium pycnometer. The microstructural and rheological properties of the date powders were significantly affected by the processing conditions used in this study. The date powder produced with MD had smooth, regular-shaped spherical particles along with good agglomeration and packing characteristics. Date powder with GA had irregular-shaped relatively smaller particles with dented surfaces with poor agglomeration and packing properties. Moreover, the rheological quality of the date powders was inversely proportional to the temperature and flow rate. The Guggenheim–Anderson–de Boer model for sorption isotherms was a suitable fit for the date powder. The monolayer moisture content for gum Arabic was twice that of the maltodextrin carrier material, whereas the monolayer heat of sorption was higher for maltodextrins. Using maltodextrin as the carrier material and drying at 150°C with a flow rate of 25 mL/min produced a free flowing less caking product as depicted by the sorption isotherms.

SutureHap

Haptic devices have been highly valued in virtual training environments in the medical field. Nevertheless, the principal challenges to develop these environments are the complexity to model the virtual elements and to provide proper haptic feedback during tasks. In this study, it was decided to take advantage of NVIDIA PhysX physics engine to produce a fast and effortless process in the creation of a virtual training environment for suturing tasks. Although PhysX correctly deploys collisions between solid and deformable objects in the graphical environment, it does not send this information to the developers environment to provide haptic rendering. Therefore, in this article, a “simplified method” was proposed to facilitate the detection of collisions between rigid and deformable bodies. This simplified method allows the calculation of haptic feedback to be displayed, and it avoids complexity and high computational costs. Additionally, an architecture to facilitate the integration of haptic devices was designed. The study case proposed in this work was the development of an application to perform a suturing task, SutureHap. The system was tested by volunteers from different areas and senior medical students. The latter pointed out that SutureHap is very promising, and it could be a useful tool to develop surgical skills. Finally, participants agreed that the use of the elements in the environment is reasonably intuitive, and all of them stated that they would recommend the simulator.

Integrated power supply system for station equipment of rail traffic control

Railway Traffic Control Systems (RTCS) provide a safe, reliable and efficient movement of rolling stock on railway networks. RTCSs are classified as critical process systems. The power supply system is required to provide a high level of power reliability so that a station equipment of an RTCS safely executes the rail traffic process. The article describes typical solutions of power supply of station equipment of RTCSs. Analysis of these solutions led to the development of assumptions and structures for the integrated power supply system of station equipment. Useful tools for the formal modeling of such systems can be Petri Nets. These nets are a graphical and formal tool for modeling, formal analysis, and design of discrete event systems. The basic element of the integrated power system which is described in the article is the Automatic Reserve Switching system (ARS system). The ARS controller Marked Petri Net (ARS controller MPN) that has been developed by the authors is presented here. The net was subject to reduction resulting in an ARS controller hierarchical simplified MPN. The article also presents the practical application of the ARS controller built using the hardware platform and graphical programming environment LabView National Instruments (NI).

Метод ідентифікації математичної моделі одного класу лінійних динамічних систем зі змінними параметрами

The article presents a method for identifying a mathematical model of a single class of linear dynamic systems with variable parameters, which includes a traction electric drive of a crane with variable parameters, caused by the change of the equivalent mass moment of inertia and the load moment of the traction motor when lifting (lowering) the load. The article also proposes and justifies the calculated relations to determine changes of the equivalent mass moment of inertia of the electric drive, caused by winding and unwinding of the cable, to which the load is suspended, on the reel connected through the reduction drive to the motor shaft. It also proposes and justifies calculated relations to determine changes of the load moment due to shortening and lengthening of the cable to which the load is suspended because of lifting or lowering the load. The article presents a step-by-step algorithm for determining all the parameters of a mathematical model of the dynamics of a crane electric drive with the time-varying moment of inertia of rotating masses and the load moment. The article presents the results of modeling the dynamics of the electric drive system during acceleration, braking, steady-state speed, idling and reverse of the traction motor considering variable parameters and using a mathematical model identified by specific passport characteristics of the traction motor, reduction drive and cable in the graphical programming environment Simulink of MATLAB application program package. The article also presents a comparative analysis of the obtained results and shows that the use of the classical equation of dynamics of an electric drive system with the constant moment of inertia and load moment leads to significant errors. And this is even despite the smooth speed control using frequency regulators for asynchronous motors and using power transistors for DC motors to change the voltage applied to the motor armature.

Multiphysical mathematical models for design, identification and diagnostics of high-precision positioning systems

A multi-physical model was implemented in the software package LabView. Its choice is due to the need to solve the developed system of equations in an implicit form. LabView is a graphical simulation environment that allows you to build dynamic models, including discrete, continuous and hybrid, non-linear and discontinuous systems, using block diagrams in the form of directed graphs. These capabilities of the program confirm the need for its selection as a modeling environment.

Profiling disk tool for generating female rotor screw compressor component by meaning of graphical method

The paper proposes a method of profiling the disk tool generating the helical groove of the female rotor of the compressor, on the basis of a complementary theorem of enveloping surfaces, e.g. theorem "Substitution Circles Family", whose principles are developed in analytical way. On the basis of this theorem is proposed a method developed in the graphical environment Auto-CAD, in purpose to design the disk tool for profiling the female rotor and also to determinate the front view profile of this rotor, screw compressor component. Has been also detailed a numerical example for a known built compressor.

GRAPHITE: A Graphical Environment for Scalable in situ Video Tracking of Moving Insects.

1. Methods for measuring animal movement are critical for understanding numerous ecological and evolutionary processes. However, few methods are available for small organisms, and even fewer methods offer consistent individual-level resolution while remaining affordable, scalable and operable in the field. 2. We describe a low-cost animal movement tracking method with a user-friendly graphical interface, called GRAPHITE. Our automated software can quantify motions of insects by offline video analysis of inexpensive and lightweight human-readable tags attached to individual insects. The integrated graphical editor provides a full-featured environment for users to review the generated tracking data and make individual- or group-level edits. 3. GRAPHITE is a novel video analysis and graphical editing software (MATLAB v.9.0.0+) that identifies tags in image frames with a minimal false negative rate, links sequences of corresponding tags into "tracks" for each individual insect, infers the tag identifier, and provides a user-friendly graphical environment for editing tracking data. Users can either batch process raw video data using the full analysis pipeline or execute GRAPHITE modules independently for a tailored analysis. 4. We demonstrate the efficacy of the developed software with a specific application to the movement of honey bees at the entrance of hives. However, this system can be easily modified to track individually marked insects of 3 mm and larger. A notable advantage of this method is its ability to provide easy access to individual-level tracking data using human-readable tags.

Focus on software and data acquisition

Focus on software and data acquisition

An example is worth a thousand words: Creating graphical modelling environments by example

Domain-specific languages (DSLs) are heavily used in model-driven and end-user development approaches. Compared to general-purpose languages, DSLs present numerous benefits like powerful domain-specific primitives, an intuitive syntax for domain experts, and the possibility of advanced code generation for narrow domains. While a graphical syntax is sometimes desired for a DSL, constructing graphical modelling environments is a costly and highly technical task. This relegates domain experts to a rather passive role in their development and hinders a wider adoption of graphical DSLs. Our aim is achieving a simpler DSL construction process where domain experts can contribute actively. For this purpose, we propose an example-based technique for the automatic generation of modelling environments for graphical DSLs. This way, starting from examples of the DSL likely provided by domain experts using drawing tools like yED, our system synthesizes a graphical modelling environment that mimics the syntax of the provided examples. This includes a meta-model for the abstract syntax of the DSL and a graphical concrete syntax supporting spatial relationships like containment and adjacency. Our system, called metaBUP, is implemented as an Eclipse plug-in. In this paper, we demonstrate its usage on a running example in the home networking domain and evaluate its suitability for the construction of graphical modelling environments by means of a user study.

MODELING SYSTEM OF AUTOMATIC SPEED REGULATION OF CONVEYOR MACHINES ROASTING TRUCKS

Context. Resolves an an actual task of developing advanced mathematical models to study regulation of the roasting trucks speed of the conveyor machine that allows to maintain a predetermined level of height pellet layer and provides optimal process for firing pellets and maximum performance Objective is a presentation of the mathematical model development results for the regulation roasting trucks speed of the conveyor machine with implementation modern SCADA-system for controlling the conveyor machine performance by regulating its moving speed roasting trucks, which leads to a change of height of the pellet layer on the trucks. Method. To evaluate the dynamic characteristics of the drive system and the simulation control the speed of movement of the roastingtrucks conveyor machine uses a powerful and universal method of research – graphical environment Simulink simulation modeling, which is a supplement to the package MATLAB for numerical analysis. When using Simulink simulation uses the principle of visual programming, in accordance with which the user on the screen of the library of standard blocks and creates a device model performs calculations. Results. The proposed mathematical model used baseline data of conveyor machines OK-306 and LURGI-278. To construct a mathematical model of the automated speed control system for moving the roasting trucks conveyor machines have calculated transfer functions of elements included in the system. As a result of simulation obtained transients when adjusting the height of the pellet layer on the roasting carts and determine their impact on the performance of the conveyor machine. For the feasibility of improving the control system pelletizing plant by the use of a mathematical model for the regulation of the speed of roasting trucks designed modern model interface SCADA-system that works in real time, and enables operational dispatch management. As the SCADA TRACE MODE 6, the height of the pellet layer control system should be developed using SCADA TRACE MODE 6 pelletizing plant systems leading automated management tool using the system. Conclusions. On the basis of the use of the output of the technological process of roasting of the pellets on the conveyor of the burning car and the calculations in a graphical environment Simulink MATLAB built a mathematical model of the system for controlling the speed of the roasting trucks conveyor machine in accordance with technological process allows to investigate influence on pellet burning process by controlling the height of the pellet layer and the performance of the conveyor machine. The proposed model of a modern SCADA-system interface that works in real time and enables operational dispatch management, can be used in real industrial environments.

Protection of a Control System of a Technical Object from Negative Influence of Human Factors by Using Steganographic Methods

Abstract It is difficult to avoid influence of human factor on work of complex technical objects, so safety systems of technical objects have to contain tools of analysis and withstanding possible negative influences from the side of service personnel (SP). To withstand negative influence of human factors on work of a complex technical object, this paper proposes to use steganographic methods of hiding certain information. For that, information is hidden from some members of service personnel (SP), for which the corresponding information is negative. Besides, certain information is hidden from some SP members that can block its transfer in the system of controlling the management process. Methods of implementing the steganographic data concealment are to a great degree dependent on the type of a digital environment that is considered to be used. Introducing the information fragments in a graphic digital environment is performed so that they would be invisible in this environment. Thus, it is necessary for values of parameters that characterize the invisibility degree to be consistent with parameters used to describe the environment itself.

Information tools for teaching the basics of programming in high school

The article focuses on the problem of finding methodological approaches to the use of information programming tools in the course of computer science high school. The definition of information tools for teaching as electronic means of storage, processing and transfer of educational information through computers is set out. The authors, based on the analysis of four existing training programs in computer science 5-9 classes, identified the topics for studying students of the middle classes of programming: "Algorithms and Programs", "Algorithms and their Implementers", "Algorithmization and Programming", "Fundamentals of algorithmization and programming". It is revealed that the computer science curriculum for grades 8-9 for general education institutions with in-depth study of individual subjects does not include any programming topics. The analysis of methodological recommendations on informatics teaching in 2016-2018 academic years allowed to determine the competency tasks that students should learn to solve when they study computer science in high school, for example, to develop and run a linear geometric figure drawing algorithm, to recreate the motion of a computer ' object on the plane, including the interception of obstacles, create a simple computer game using variables, analyze the results of the implementation of programs for processing values of numeric type, create a software project and more. The authors analyze the possibilities of such information learning tools as online gaming platforms, Internet resources, online programming learning environments, graphical programming environments, interactive learning environments, and application development environments. The methodical approaches to the use of informational learning tools in the course of computer science high school: the implementation of online online exercises to learn theoretical concepts, solving problems from the basics of algorithmization and programming in the online environment, teaching the stages of creating a program project through the study of online courses, the implementation of tasks for training programming in the online learning environment; learning in action with a graphical programming environment for robots; development of a software project in the programming environment.

WEB BROWSERS: UNTANGLING THE WORLD WIDE WEB

Not only are Internet resources expanding exponentially, but they are becoming more sophisticated, incorporating a variety of multimedia and hypertext components. Internet documents on the World Wide Web may contain elaborately formatted text, color graphics, audio, and video as well as dynamic connections to other Internet resources via hypertext links. In addition to providing user-friendly access to hypermedia resources, most Web browsers (client software) provide a rich graphical environment for authoring and displaying electronic documents locally. This article describes the World Wide Web and a sampling of the available Web browsers. It then discusses a testproject developed at the University of Nebraska-Lincoln Libraries designed to explore the potential, demands, and pitfalls of Web access to the Internet, as well as to investigate hypermedia document creation in an academic libraryenvironment. The experiences with the project qonfirmed the importance of the World Wide Web and Web browsers to this environment, so much so that providing access to these Internet resources must be seen as mandatory to any academic or upper level educational library providing electronic information access.