Object Pascal Research Articles

Computational method to determine the pitch length in cholesteric liquid crystals

Cholesteric liquid crystals are consisted of nematic layers, with a small rotation of the director as we pass from one to the other. This rotation produces a helical structure and the distance to perform one full rotation of the director is known as the pitch length. The pitch length characterizes the cholesteric mesophase and, for this reason, in the present article, we propose a computational method to determinate this parameter with high precision. We use the texture of the cholesteric phases obtained via polarizing light microscopy and an Object Pascal language to write our program.

Simulation mathematical model of the mixing process of bulk components in the mixer

The developed simulation model allows computer experiments on mixing components in which the parameters of the components of the mixture or mixer are changed, the nature of the influence of the parameter is established and recommendations for choosing the optimal values of the parameter are given. The model of the mixing process takes into account the size, shape and rheological properties of the components of the mixture, as well as the interaction of the bulk material with the working surfaces of the mixer (blades, blade struts, shafts, housing). The simulation mathematical model of the mixer has a high spatial resolution for the correct reproduction of the interaction of particles in the mixing process. In the framework of the finite element approximation, the bulk material is represented as a set of elements. The particle dynamics method was used to model the mechanical behavior of the mixture. Modeling is performed in three-dimensional Cartesian space. The state of each element is defined by six variables: the coordinates of its center and the velocity components. The solution of this system of differential equations of the second order are the functions that determine the trajectories of motion of the elements and allow to evaluate the efficiency of the mixing process. To solve differential equations of this kind, the second – order numerical method-Runge-Kutta is used. A computer program in the Object Pascal language in the Borland Delphi 7 integrated programming environment has been developed to implement the calculation according to the above formulas and to make it easier to conduct a series of computer experiments. The developed mathematical model of the process of mixing of bulk components allows to choose rational technological modes of mixing, which makes it possible to increase the homogeneity of mixing up to 98 %, and to calculate the kinematic mode of the mixing process in the mixer by creating a "quasi-weight" hydrodynamic mixing mode and a significant acceleration of the mixing process.

Imitation Modelling of Influence of Relief of Mountain Slope on Destructive Ability of Snow Avalanches

The paper proposes a simulation model of avalanche snow mass movement based on the particle dynamics method. The total volume of snow mass is broken down into separate elements which can be either interconnected by certain forces or move independently of each other subject to prehistory. For the purposes of consistency of primary mechanical properties of snow mass, the interaction of its elements is commonly supposed to be viscoelastic. Viscoelastic interaction of snow mass elements makes it possible to take into account, while modeling, the ability of snow mass to disintegrate. A computer program was written in Object Pascal language in Borland Delphi 7.0 integrated programming environment to run multiple computer experiments with the model with the subsequent studying of the impact of primary physical and mechanical properties of snow mass on intensity of its down-slope movement. The model was verified by comparing of computer calculations of avalanche pressure and experimental data. The model curve agrees well with the experimental curve. The average model-experiment variation is approximately 7%.

The Method of Computer-Aided Design of a Bread Composition with Regard to Biomedical Requirements

A method for efficient software implementation of bread optimized multicomponent mixtures has been developed. These polycomposite mixtures have a chemical composition that meets the modern physiological standards of nutrition for the elderly people. To implement the developed algorithm a high-level programming language Object Pascal was used using the IDE Borland Delphi 7.0. An unconventional raw material was selected, which allows to provide necessary requirements to the quality indicators of the finished bread in all modeled mixtures. Modeling the composition of flour mixtures for gerodietic nutrition using the software made it possible to obtain compositions with a specific ratio of prescripted components, balanced in accordance with the intended purpose.

Simulation of drying process of secondary products of fish cutting and description of the main processes of heat and moisture transfer in the model

The effectiveness of drying is largely determined by the ability to quickly manage this process and maintain the regime parameters at a given level. At the heart of any control system is a mathematical description of the process. The paper discusses the process of drying secondary products of fish cutting, as an object of possible modeling and mathematical description of complex physical phenomena of heat and mass transfer. To simulate the processes of heat and moisture transfer, a method based on the generally accepted equations of heat and moisture transfer A.V. Lykova is used. For the convenience of modeling and repeated computer experiments, the computer program "Program for modeling the drying of fish products with additional microwave heating" in the language of Object Pascal in the integrated programming environment Borland Delphi 7 was developed. The program is designed to simulate the drying process of fish products by solving the problem of heat - and moisture transfer on a cubic grid, taking into account the combined heating technology (convective and microwave heating). The program can be used to optimize the drying modes and parameters of the microwave source. In the text of the program, the thermophysical parameters can be given to solve the problem of heat and moisture transfer, the geometric parameters and structure of the fish parts, the parameters of the microwave source. In the process of computer experiment on drying products from fish, the program regularly displays on the computer screen the graphs and cartograms of the spatial distribution of humidity and temperature. The main technical characteristics of the program: the number of grid nodes for solving the problem of heat and moisture transfer: 50 x 50 x 40; the approximate time of one computer experiment is about 5 minutes.

Automated Calculation of Bulk-Stamping Matrices for Circular Blanks

The bulk stamping of circular blanks is considered. There is a clear need for automatic stamping. The input and output data for calculating the working part of the bulk-stamping matrix are analyzed. Software for automated calculation of bulk-stamping matrices is developed. The program code and a possible interface for the calculation of matrix parameters and construction of 3D models by means of the Object Pascal language are presented.

Iterative spectral clustering for unsupervised object localization

This paper addresses the problem of unsupervised object localization in an image. Unlike previous supervised and weakly supervised algorithms that require bounding box or image level annotations for training classifiers, we propose a simple yet effective technique for localization using iterative spectral clustering. This iterative spectral clustering approach along with appropriate cluster selection strategy in each iteration naturally helps in searching of object region in the image. In order to estimate the final localization window, we group the proposals obtained from the iterative spectral clustering step based on the perceptual similarity, and average the coordinates of the proposals from the top scoring groups. We benchmark our algorithm on challenging datasets like Object Discovery and PASCAL VOC 2007, achieving an average CorLoc percentage of 51% and 35% respectively which is comparable to various other weakly supervised algorithms despite being completely unsupervised.

SEED 2: a user-friendly platform for amplicon high-throughput sequencing data analyses.

MotivationModern molecular methods have increased our ability to describe microbial communities. Along with the advances brought by new sequencing technologies, we now require intensive computational resources to make sense of the large numbers of sequences continuously produced. The software developed by the scientific community to address this demand, although very useful, require experience of the command-line environment, extensive training and have steep learning curves, limiting their use. We created SEED 2, a graphical user interface for handling high-throughput amplicon-sequencing data under Windows operating systems.ResultsSEED 2 is the only sequence visualizer that empowers users with tools to handle amplicon-sequencing data of microbial community markers. It is suitable for any marker genes sequences obtained through Illumina, IonTorrent or Sanger sequencing. SEED 2 allows the user to process raw sequencing data, identify specific taxa, produce of OTU-tables, create sequence alignments and construct phylogenetic trees. Standard dual core laptops with 8 GB of RAM can handle ca. 8 million of Illumina PE 300 bp sequences, ca. 4 GB of data.Availability and implementationSEED 2 was implemented in Object Pascal and uses internal functions and external software for amplicon data processing. SEED 2 is a freeware software, available at http://www.biomed.cas.cz/mbu/lbwrf/seed/ as a self-contained file, including all the dependencies, and does not require installation. Supplementary data contain a comprehensive list of supported functions.Supplementary information Supplementary data are available at Bioinformatics online.

SOFTWARE FOR MANAGING LOCALIZED IRRIGATION SYSTEMS IN FRUIT TREES

We developed a computer program for managing localized irrigation schedules, which is based on the crop evapotranspiration (ETc). The reference evapotranspiration (ETo) can be estimated by the FAO’s standard method, Penman-Monteith, and by four more alternative methods (Priestley-Taylor, Jesen-Haise, Hargreaves-Samani and Class A evaporation pan) in case the user does not have all the necessary climatic variables for estimating the ETo by the standard method. The program estimates the crop coefficient (Kc) of fruit trees, such as mango, banana, papaya, grape, guava, passion fruit, and citrus, which are commonly grown fruits in the Semiarid of Bahia. It allows estimating the daily irrigation run time of these crops, not being restricted, however, to them. The application was developed in Object Pascal programming language through the integrated development environment (IDE) Lazarus 1.6, which enabled the creation of a simple and friendly interface, as well as accurate calculation routines.

Learning discriminated and correlated patches for multi-view object detection using sparse coding

Multi-view object detection is an open and challenging problem due to its inherent intra-class variability among discrete viewpoints. This paper aims to perform multi-view object detection by learning discriminated and correlated patches firstly and then making inference based on them. In the training stage, discriminative patches are discovered for each view by a Hough decision tree corresponding to leaf nodes with high distinctiveness and stable spatial distributions in the tree. Then discriminated patches across different views are linked to establish the correlations between any two neighboring views. During multi-view detection, intra-view direct votes and inter-view transfer votes are integrated to obtain voted Hough images through a probabilistic approach with each view having one Hough image, and Mean-Shift estimation is finally employed to detect object instances and infer image viewpoint. The experiments performed on two benchmark multi-view 3D Object Category datasets and PASCAL VOC’06 Car dataset illustrate the effectiveness of the proposed framework.

SOFTWARE DIDÁTICO PARA CÁLCULOS DE SISTEMAS DE RECALQUE DE ÁGUA

Os cálculos necessários para determinar com precisão a perda de carga nos mais variados tipos de tubulações e acessórios que compõem um sistema de recalque de fluídos são longos, trabalhosos e suscetíveis a erros. Assim, o objetivo deste trabalho foi desenvolver um software didático para dimensionamento de sistemas de recalque hidráulico com aplicações na engenharia agrícola, todas páginas e componentes do software foram desenvolvidos através do ambiente de desenvolvimento integrado Lazarus 1.6 na linguagem de programação Object Pascal, o que possibilitou simplicidade no visual gráfico e robustez nos cálculos realizados, obedecendo às restrições indicadas na literatura para as equações adotadas, possibilitando assim, resultados confiáveis e com rapidez.

PUNCHING CALCULATION OF REINFORCED CONCRETE FLOOR SLABS

Abstract. In this paper is considered the modeling of a monolithic reinforced concrete buildings structures by the spatial plate-core scheme and study of the floor slabs punching problem. When creating the finite element model of the building structure the floor slabs were created by four-node quadrilateral finite elements with 24 degrees of freedom, the columns and beams were created by spatial rods with 12 degrees of freedom. The calculation of the frame has been done by the software complex «SCAD», are got the efforts in the framework elements and are determined the concentration of stresses in the connections of slabs and columns. The program «Calculation of floor slab on punching» has been developed by the high-level language Object Pascal in Delphi environment, in accordance with the design standard which allows to research different locations of columns and stiffening diaphragms on the floor slab. The ratio of bearing capacity of the slab was calculated by means of the software «Calculation of floor slab on punching». Results are well correlated with the program «Arbat» of the software complex «SCAD». Difference of the developed program is in the possibility of considering of the columns and stiffness diaphragm location options on the floor slab (central, edge, corner). Program «Calculation of floor slab on punching» is recommended for use in the design of monolithic reinforced concrete structures.

Numerical Analysis of an Internal Combustion Engine Using One-Dimensional Code

The work aims to model a spark ignition reciprocating Internal Combustion Engine - ICE. A code was built in Object Pascal to simulate another ICE and now it is being adapted to this research single-cylinder engine using commercial ethanol. The model describes in-cylinder gas by conservation equations, including the momentum conservation, and solves combustion wave equations, such that detonation and deflagration are calculated by the same set of formulas. Adjustments were made to get a proper discharge coefficient for the valves and represent the internal geometry. The mass flow rate calculated by the program differed in only 1% of the experimental value. The maximum pressures from combustion graphs differed in less than 1% too and their curves were similar. Other parameters of interest, also found to be close to the experimental ones, are presented and discussed. The code also showed as a good result the simulation time, which was approximately two minutes.

Robust image region descriptor using local derivative ordinal binary pattern

Binary image descriptors have received a lot of attention in recent years, since they provide numerous advantages, such as low memory footprint and efficient matching strategy. However, they utilize intermediate representations and are generally less discriminative than floating-point descriptors. We propose an image region descriptor, namely local derivative ordinal binary pattern, for object recognition and image categorization. In order to preserve more local contrast and edge information, we quantize the intensity differences between the central pixels and their neighbors of the detected local affine covariant regions in an adaptive way. These differences are then sorted and mapped into binary codes and histogrammed with a weight of the sum of the absolute value of the differences. Furthermore, the gray level of the central pixel is quantized to further improve the discriminative ability. Finally, we combine them to form a joint histogram to represent the features of the image. We observe that our descriptor preserves more local brightness and edge information than traditional binary descriptors. Also, our descriptor is robust to rotation, illumination variations, and other geometric transformations. We conduct extensive experiments on the standard ETHZ and Kentucky datasets for object recognition and PASCAL for image classification. The experimental results show that our descriptor outperforms existing state-of-the-art methods.

DEMMAT CODE FOR NUMERICAL SIMULATION OF MULTI-PARTICLE SYSTEMS DYNAMICS

The paper presents three versions of software codes for the simulation of granular material dynamics based on the discrete element method. The codes DEMMAT_F90 and DEMMAT_PAS are used for the imple-mentation of a purely procedural approach by the programming languages FORTRAN 90 and OBJECT PASCAL, while the code DEMMAT_CPP represents a purely object-oriented programming approach based on applying C++.

Особенности математического моделирования древесного полимер-песчаного композита

This article describes a technique for modeling of wood polymer-sandy composite. Interface input form of initial data for modeling; differential equations underlying the mathematical model are presented. To solve the system of differential and algebraic equations computer program "Program to simulate the struc-ture and mechanical properties of wood polymer-sandy composite" is developed. The program, developed in the environment of Borland Delphi 7.0, programming language Object Pascal, is intended for modeling the mechanical behavior of wood polymer-sandy composite of given composition.

Confederated database on Moscow University students up to the year 1917

An interdisciplinary project concerning the design and creation of an information system on Moscow University students up to 1917 is described. The concept of a confederated database is introduced, which is viewed as the most convenient tool for performing this and similar tasks. The shell of the system and the utilities are written in Object Pascal with the use of the Lazarus library. At present, the databases over 1835, 1886/1887, 1901/1902, and 1912/1913 academic years have been prepared for the system.

EpHLA: An innovative and user-friendly software automating the HLAMatchmaker algorithm for antibody analysis

The global challenge for solid organ transplantation programs is to distribute organs to the highly sensitized recipients. The purpose of this work is to describe and test the functionality of the EpHLA software, a program that automates the analysis of acceptable and unacceptable HLA epitopes on the basis of the HLAMatchmaker algorithm. HLAMatchmaker considers small configurations of polymorphic residues referred to as eplets as essential components of HLA-epitopes. Currently, the analyses require the creation of temporary files and the manual cut and paste of laboratory tests results between electronic spreadsheets, which is time-consuming and prone to administrative errors. ResultsThe EpHLA software was developed in Object Pascal programming language and uses the HLAMatchmaker algorithm to generate histocompatibility reports. The automated generation of reports requires the integration of files containing the results of laboratory tests (HLA typing, anti-HLA antibody signature) and public data banks (NMDP, IMGT). The integration and the access to this data were accomplished by means of the framework called eDAFramework. The eDAFramework was developed in Object Pascal and PHP and it provides data access functionalities for software developed in these languages. The tool functionality was successfully tested in comparison to actual, manually derived reports of patients from a renal transplantation program with related donors. ConclusionsWe successfully developed software, which enables the automated definition of the epitope specificities of HLA antibodies. This new tool will benefit the management of recipient/donor pairs selection for highly sensitized patients.

Cooperative and competitive concurrency in scientific computing. A full open-source upgrade of the program for dynamical calculations of RHEED intensity oscillations

Cooperative and competitive concurrency in scientific computing. A full open-source upgrade of the program for dynamical calculations of RHEED intensity oscillations

Urban Transit Inquiry System and Optimal Route Selection Model

An urban transit inquiry system is studied in this paper. Since the data are abundant, it is unfavorable to use conventional method. The concept of bus cluster is put forward to establish a network graph theory model by means of the radiation and sweeps methods. Therefore, an automatic inquiry system is developed based on the platform of the software Delphi and Object Pascal program. Through this inquiry system, the optimal route between any two transit stations can be quickly inquired in different needs. Consequently, the route selection problem is solved.