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Projecting by conical screw lines with constant step

IOP Conference Series: Materials Science and Engineering 2018年第1期451卷

作者： E V Denisova M V Voronina Z O Tretyakova Department of Descriptive Geometry and Engineering Graphics Saint-Petersburg State University of Architecture and Civil Engineering 4 2-ya Krasnoarmeiskaya st. Saint Petersburg 199105 Russia Department of Descriptive Geometry and Graphics Saint-Petersburg Mining University 2 21st Line Saint Petersburg 199106 Russia

The relevance of the study: The formation of surfaces by analytical methods and their visualization using computer graphics is one of the topical problems of applied geometry. Purpose of the study is to investigate non-traditional projection systems, to select congruence parameters of conical helical lines that cover the entire complex of surface requirements, obtained by projecting with conic rays an arbitrary flat or spatial line and using computer graphics in visualization of the surface. Methods of research: The general analytical theory of applied surface molding, developed by prof. Skidan I A and a single unit, which is based on the mathematical support of computer technologies for designing and creating objects of complex shape. Results of the research: An example of an analytical interpretation of the image of curvilinear projection by conical screw lines of a constant step and an example of congruence of conical screw lines, located on coaxial cones with a common vertex and a variable angle of inclination of the generator to the axis. The properties are investigated, the parameters of the helical line of the congruence, passing through an arbitrary point of space that does not belong to the axis, are determined. A method is proposed for constructing spiral surfaces, the framework of which consists of rays projecting an arbitrary line.

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Analysis and Recommendations for Education Process of Experts in the Field of Scanning Probe Microscopy

Analysis and Recommendations for Education Process of Expert...

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2017 4th International Conference on Advanced Education Technology and Management Science(AETMS 2017)

作者： ?tefan T?LU Dinara SOBOLA Nikola PAPE? Technical University of Cluj-Napoca Faculty of Mechanical Engineering Department of AETDiscipline of Descriptive Geometry and Engineering Graphics Brno University of Technology Faculty of Electrical Engineering and Communication Department of Physics

This paper describes the mandatory conditions for training specialists in the widespread and still continuously developing microscopic technique for studying of materials surface. Traditional methods of education are not sufficient for teaching of the multidisciplinary subjects. Available information technologies and resources alone do not ensure learning success. There is need for a conceptual review and analysis of the cases in the sphere of specialists training. Scanning probe microscopy is based on the fundamental concepts of quantum mechanics, physics, chemistry, etc. In this regard, the specialist has to achieve knowledges in the field of science(physical and chemical laws), and at the same time there is necessity to be educated in approaches for the study and description of surface quality.

关键词： Modern teaching Study methodology Microscopy technique

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Integration of content and technologies of teaching within framework of geometrical-graphic training of students

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IOP Conference Series: Materials Science and Engineering 2018年第1期451卷

作者： I D Stolbova Ye K Gitman A A Ovchinnikov Department of Design Graphics and Descriptive Geometry Perm National Research Polytechnic University 29 Komsomolsky Avenue Perm 614990 Russia Department of Pedagogy Perm State Humanitarian-Pedagogical University 24 Sibirskaya Street Perm 614045 Russia

In this paper the problem of geometric-graphic preparation of civil engineering students is considered. The development of the integrative educational discipline 'descriptive geometry, engineering and computer graphics', implemented within the foundation part of the higher educational specialised program 'Construction' is proposed. The prerequisites of the integrative approach in accordance with innovations in engineering design and modern requirements for the project culture of future graduates are discussed. Possible methods and pedagogical technologies for implementing the approach are considered. The manifestations of the integrative approach are shown at the innovative organization of the educational process, creating conditions for the functioning of the learning environment for the formation of professional competencies in students corresponding to the requirements of real design and engineering activities. An example of a complex task for the design of a building structure is given, the results of which allow one to assess the level of the students' competences, formed within the framework of graphic preparation.

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Reinforcement of weak seasonally freezing soils at road consructing by double-cone hollow pile method

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IOP Conference Series: Materials Science and Engineering 2018年第1期451卷

作者： B S Yushkov A A Degtyar A B Shakhova Department of Highways roads and bridges Perm National Research Polytechnic University 29 Komsomolsky Avenue Perm 614990 Russia Department of Design Graphics and Descriptive Geometry Perm National Research Polytechnic University 29 Komsomolsky Avenue Perm 614990 Russia

The article deals with the reinforcement method of weak seasonally freezing soils in subgrade base by using double-cone hollow piles, tridimensional geogrid, geotextile for roads in the northern regions of the Russian Federation. The method of calculating the road base in the form of pile strip foundation of double-cone hollow piles reinforced by tridimensional geogrid and geotextile on weak heaving soils taking into account traffic loads and weight of subgrade is considered. The developed method of calculation is based on the formation of soil compaction zones in the near-pile space as a result of pile driving into the ground, which leads to an increase in the structural strength of the weak soil, and also takes the arch effect that occurs in the soil between adjacent pile heads.

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Analysis of normal human retinal vascular network architecture using multifractal geometry

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International Journal of Ophthalmology(English edition) 2017年第3期10卷 434-438页

作者： Stefan Talu Sebastian Stach Dan Mihai Calugaru Carmen Alina Lupascu Simona Delia Nicoara Discipline of Descriptive Geometry and Engineering Graphics Department of AETFaculty of Mechanical EngineeringTechnical University of Cluj-Napoca103-105 B-dul Muncii St.Cluj-Napoca 400641ClujRomania Department of Biomedical Computer Systems Institute of InformaticsFaculty of Computer Science and Materials ScienceUniversity of SilesiaBedzifiska 3941-205 SosnowiecPoland Discipline of Ophthalmology Department of Surgical Speci-alties and Medical ImagingFaculty of Medicine'Iuliu Halie-ganu'University of Medicine and Pharmacy Cluj-Napoca8 Victor Babes St.Cluj-Napoca 400012ClujRomania Department of Mathematics and Informatics University of PalermoVia Archirafi 34Palermo 90123Italy

AIM：To apply the multifractal analysis method as a quantitative approach to a comprehensive description of the microvascular network architecture of the normal human ***：Fifty volunteers were enrolled in this study in the Ophthalmological Clinic of Cluj-Napoca,Romania,between January 2012 and January 2014. A set of 100 segmented and skeletonised human retinal images,corresponding to normal states of the retina were studied. An automatic unsupervised method for retinal vessel segmentation was applied before multifractal analysis. The multifractal analysis of digital retinal images was made with computer algorithms,applying the standard boxcounting method. Statistical analyses were performed using the Graph Pad In Stat ***：The architecture of normal human retinal microvascular network was able to be described using the multifractal geometry. The average of generalized dimensions（D_q）for q=0,1,2,the width of the multifractal spectrum（Δα=α_（max）-α_（min））and the spectrum arms＇ heights difference（│Δf│）of the normal images were expressed as mean±standard deviation（SD）：for segmented versions,D_0=1.7014±0.0057; D_1=1.6507±0.0058; D_2=1.5772±0.0059; Δα=0.92441±0.0085; │Δf│= 0.1453±0.0051; for skeletonised versions,D_0=1.6303±0.0051; D_1=1.6012±0.0059; D_2=1.5531± 0.0058; Δα=0.65032±0.0162; │Δf│= 0.0238±0.0161. The average of generalized dimensions（D_q）for q=0,1,2,the width of the multifractal spectrum（Δα）and the spectrum arms＇ heights difference（│Δf│）of the segmented versions was slightly greater than the skeletonised ***：The multifractal analysis of fundus photographs may be used as a quantitative parameter for the evaluation of the complex three-dimensional structure of the retinal microvasculature as a potential marker for early detection of topological changes associated with retinal diseases.

关键词： generalized dimensions multifractal retinal vessel segmentation retinal image analysis retinal microvasculature standard box-counting method

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Micromorphology of AlN Epilayers on Sapphire Substrates

Micromorphology of AlN Epilayers on Sapphire Substrates

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2017 International Conference on Computer, Electronics and Communication Engineering(CECE2017)

作者： ?tefan ??LU Dinara SOBOLA Pavel TOMáNEK Sebastian STACH Technical University of Cluj-Napoca Faculty of Mechanical Engineering Department of AETDiscipline of Descriptive Geometry and Engineering Graphics Brno University of Technology Faculty of Electrical Engineering and Communication Physics Department University of Silesia Faculty of Computer Science and Materials Science Institute of InformaticsDepartment of Biomedical Computer Systems

The purpose of this paper was to describe the 3 D nano-scaled surface topography of the aluminum nitride on sapphire. The structures were prepared by magnetron sputtering with heating of the sapphire substrate. The dependence of the layers topography on the substrate temperature was presented. Surface appearance was studied by atomic force microscopy(AFM). The quantitative topography data from AFM were used for surface characterization by fractal analysis and statistical parameters. The results of fractal analysis show the correlation of fractal dimension and statistical characteristics of surface topography. The data may contribute to manufacture of AlN thin films with desired surface characteristics.

关键词： Aluminum nitride Atomic force microscopy Fractal analysis Minkowsky functionals Surface micromorphology

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Socio-Cultural Problems of Sustainable Urban Environment

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IOP Conference Series: Materials Science and Engineering 2018年第2期463卷

作者： L Shabatura N Bauer O Iatsevich Institute of service and industry management Department of humanities and technologies Tyumen industrial university Volodarskogo 38 Tyumen 625000 Russia Construction institute Department of descriptive geometry and graphics Tyumen industrial university Volodarskogo 38 Tyumen 625000 Russia Institute of service and industry management Department of foreign languages Tyumen industrial university Volodarskogo 38 Tyumen 625000 Russia

Urban environment is a complex concept that includes material structure (buildings, constructions, transport, industry, utility lines, etc.) and natural environment with a variety of anthropogenic factors. Consistent patterns and directions of development of the urban environment are interrelated with philosophy, religion, science, aesthetics, socio-economic relations, natural and climatic characteristics and culture of a particular country. According to the methodological principles of anthropologism and historism, the authors understand the urban environment as a continuum of coexistence, communication, interactions, relationships and needs of different nature and level, as a socio-cultural space of human life. Leading research workers from different scientifical branches present the urban space in contemporary anthropological versions of ontological theories as a unique space of human existence. Being a symbol of culture, the city, as the mechanism of its conversion to real forms of life, developing a socio-psychological community and the human's personality. Urban environment designers try to form the ambience under the influence of processes taking place in society at each historical stage. At the same time, the urban environment has an impact on the social well-being, worldview, attitudes, behavior and culture of the citizens. Therefore, the urban environment must meet the functional, aesthetic, spiritual, cultural human's needs, promoting to the creation of favorable conditions for his life.

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Innovative Organization of Project Activity of Construction Students

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IOP Conference Series: Materials Science and Engineering 2017年第1期262卷

作者： I D Stolbova E P Aleksandrova M N Krainova Department of Design Graphics and Descriptive Geometry Perm National Research Politechnical University 29a Komsomolsky Avenue Perm 614000 Russia

The construction industry competitiveness depends on its equipping with information modeling technologies. This requires training and development of human resources. The advantages of BIM-technologies are considered. The requirements for the specialists capable of promoting information modeling technologies in the construction industry are discussed. For a wide application of BIM-technologies, the problem of training personnel with a new thinking must be solved. When preparing graduates of the major 'Construction', it is necessary to introduce innovative educational technologies aimed at building the students' ability for team work, competences in the field of modern information and communication technologies, as well as design skills basing on spatial modeling. Graphic training is the first discipline of the professional orientation for construction students. In the context of training it is important to create such learning environment that is close to a professional one. The paper provides the examples of practice-oriented assignments based on the project method in the course of students' independent work.

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On Technological Properties of Modified Epoxy Composites

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IOP Conference Series: Materials Science and Engineering 2017年第1期262卷

作者： M Gavrilov Department of Descriptive Geometry and Graphics Penza State University of Architecture and Construction 28 Titova Str. Penza 440028 The Russian Federation

The technological properties of epoxy composite materials based on constructional and chemical waste have been reviewed. The viscosity and component wettability of modified epoxy composites have been researched. The u...

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Research of thermal processes in industrial premises with energy-saving technologies of heating

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Diagnostyka 2017年第2期18卷 43-49页

作者： Gumen, Olena Spodyniuk, Nadiia Ulewicz, Malgorzata Martyn, Yevgen National Technical University of Ukraine Igor Sikorsky Kyiv Polytechnic Institute Department of Descriptive Geometry Engineering and Computer Graphics Peremohy pr. 37 Kyiv03056 Ukraine Lviv Polytechnic National University Department of Heat and Gas Supply and Ventilation St. Bandery 12 Lviv - 1379013 Ukraine Czestochowa University of Technology Department of General Building Engineering and Building Physics Akademicka 3 Czestochowa42-201 Poland Lviv State University of Life Safety Department of Project Management Information Technologies and Telecommunications Kleparivska 35 Lviv - 0779007 Ukraine

The article presents the results of experimental research of thermal processes in industrial premises with energy-saving technologies of heating and their analysis by geometric modeling tools and graphic computer technologies. The effectiveness of using the method of forced feeding of air heated by infrared emitter involving compromise graphical optimization was analyzed by geometric way.

关键词： geometry

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