Traffic Accident Reconstruction Technology Research

2013 ◽  
Vol 756-759 ◽  
pp. 946-951
Author(s):  
Xiao Long Yang ◽  
Ping Li ◽  
Tao Lv ◽  
Xue Hua Liao
Keyword(s):  
Traffic Accident ◽  
Traffic Accidents ◽  
Three Dimensional ◽  
Conservation Of Energy ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Vehicle Collision ◽  
Modeling Software ◽  
Three Dimensional Models ◽  
Energy And Momentum

Based on the virtual simulation theory, we used three-dimensional modeling software to build modeling road facilities (vehicles, trees, street lights, etc.) for simulating the accident environment, and by using OpenGL technology, achieved reading, displaying and controlling the three-dimensional models. This dynamically realized the three-dimensional animated simulation of vehicle movement. Simultaneously we have calculated in progress the simulation of vehicle crash with the basic theory of automobile collision, vehicle collision model and the law of conservation of energy and momentum. Finally, we constructed a flexible platform for the simulation experiment. The platform is enabling to add and update road, trees, street lamps and house on the simulation environment dynamically, and has ability to analysis the traffic accident. This could give an assistant to the handling traffic accidents.

scholarly journals Manufacturing of Flexible Surgical Guide for Fully Edentulous Patients

2012 ◽  
Vol 488-489 ◽  
pp. 1001-1005 ◽  
Author(s):  
Jamal Kashani ◽  
Zohreh Arabshahi ◽  
Mohammed Rafiq Abdul Kadir ◽  
Abbas Azari
Keyword(s):  
Three Dimensional ◽  
Internal Diameter ◽  
Surgical Guide ◽  
Three Dimensional Modeling ◽  
Surgical Guides ◽  
Dimensional Modeling ◽  
Drill Diameter ◽  
Modeling Software ◽  
Three Dimensional Models ◽  
Edentulous Patients

Despite efficiency of modern implantology, unplanned perforation and drill deviation could be happened during freehand placement. The aim of this study was to provide a methodology for fabricating dental surgical drill guide for fully edentulous patients while it was flexible in term of changing drill diameter. The data of patient consisted of bone anatomy and radio-opaque template obtained from computed tomography. Jawbone and radio-opaque template three dimensional models converted into a three dimensional modeling software by means of an image processing package. Based on jawbone anatomy and radio-opaque template, implantation plan and design of surgical guides were carried out in three dimensional software. Rapid prototyping technique was used to manufacture several surgical guides to be used in different drilling sequences. Finally stainless steel tubes were accommodated passage of drill. Sequential surgical guides were different only in terms of the metal tubes internal diameter. This provides the ability of changing diameter of the implant or drill after fabricating surgical guide.

Fractals In Three-Dimensional Space. I-Fractals

2017 ◽  
Vol 5 (3) ◽  
pp. 51-66 ◽  
Author(s):  
Л. Жихарев ◽  
L. Zhikharev
Keyword(s):  
Dimensional Space ◽  
Three Dimensional ◽  
Georg Cantor ◽  
Fractal Sets ◽  
Three Dimensional Modeling ◽  
Mathematical Programs ◽  
Dimensional Modeling ◽  
Cutting Out ◽  
Modeling Software ◽  
Three Dimensional Models

It has long been known that there are fractals, which construction resolve into cutting out of elements from lines, curves or geometric shapes according to a certain law. If the fractal is completely self-similar, its dimensionality is reduced relative to the original object and usually becomes fractional. The whole fractal is often decomposing into a set of separate elements, organized in the space of corresponding dimension. German mathematician Georg Cantor was among the first to propose such fractal set in the late 19th century. Later in the early 20th century polish mathematician Vaclav Sierpinski described the Sierpinski carpet – one of the variants for the Cantor set generalization onto a two-dimensional space. At a later date the Austrian Karl Menger created a three-dimensional analogue of the Sierpinski fractal. Similar sets differ in a number of parameters from other fractals, and therefore must be considered separately. In this paper it has been proposed to call these fractals as i-fractals (from the Latin interfican – cut). The emphasis is on the three-dimensional i-fractals, created based on the Cantor and Sierpinski principles and other fractal dependencies. Mathematics of spatial fractal sets is very difficult to understand, therefore, were used computer models developed in the three-dimensional modeling software SolidWorks and COMPASS, the obtained data were processing using mathematical programs. Using fractal principles it is possible to create a large number of i-fractals’ three dimensional models therefore important research objectives include such objects’ classification development. In addition, were analyzed i-fractals’ geometry features, and proposed general principles for their creation.

Research on Three-Dimensional Modeling of Multi-Thread Single Screw Pump Rotor and Stator Based on UG

2010 ◽  
Vol 426-427 ◽  
pp. 114-117
Author(s):  
Xing Wei Sun ◽  
Qiao Yun Wang ◽  
Ke Wang ◽  
Lei Wang
Keyword(s):  
Three Dimensional ◽  
Machining Accuracy ◽  
Screw Pump ◽  
Single Screw ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Modeling Software ◽  
Three Dimensional Models ◽  
Spiral Surface ◽  
The Mathematical Model

Single screw pump is a kind of inside engaged biased rotation volume pump, which is widely applied in a number of major fields of the national economy. The key components are the rotor and the stator with complex spiral surface, which are meshing with each other. The machining accuracy of them makes effect on the working performance of single screw pump directly. In this paper, the operation principle of the single screw pump with large lead and multiple heads was represented, and the mathematical model of the rotor and the stator was established. The three-dimensional models of rotor and stator of single screw pump were put into effect with three-dimensional modeling software UG. This study has laid a theoretical foundation to the research of new manufacturing technology of the spiral curved surface and the development of the corresponding machine.

THREE-DIMENSIONAL MODELING AS A SYSTEM FOR DISPLAYING TOTAL CHEMICAL SOIL POLLUTION

2021 ◽  
pp. 6-14
Author(s):  
N.P. KARPENKO ◽  
◽  
M.A. SHIRYAEVA
Keyword(s):  
Soil Contamination ◽  
Soil Pollution ◽  
3D Modeling ◽  
Catchment Area ◽  
Three Dimensional ◽  
Environmental Situation ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Total Soil ◽  
Three Dimensional Models

The method of three-dimensional model in the system of computer modeling MathCad and Autodesk 3ds Max by categories of total soil pollution is developed. A visualization block and an analytical block have been developed which are based on calculated mathematical models for analyzing and evaluating the environmental situation, risks, and environmental safety of the territory. Three-dimensional models of relief mapping of the Pekhorka river fl oodplain are constructed by integrating them with the help of a programming environment and optimized 3D modeling programs. Three-dimensional models with total soil contamination for water body sections are constructed. On the example of some sections of the catchment area of the Pekhorka river in the Balashikha region, models with soil contamination by the total ZC indicator were created. The development of 3D modeling techniques allows you to create predictive scenarios more accurately with a high degree of detail, as well as quickly approach the solution of environmental problems. Optimization of three-dimensional modeling in the fi eld of problems related to the catchment area contributes to the further operational solution of problems of rational land use and improvement of the environmental situation.

scholarly journals Processing Three-Dimensional Models of Archaeological Artifacts

2021 ◽  
Vol 20 (7) ◽  
pp. 48-61
Author(s):  
Pavel V. Chistyakov ◽  
Ekaterina N. Bocharova ◽  
Ksenia A. Kolobova
Keyword(s):  
Three Dimensional ◽  
3D Models ◽  
International Standards ◽  
Post Processing ◽  
Three Dimensional Model ◽  
Scaled Model ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Dimensional Models ◽  
Three Dimensional Models

This article provides a detailed account of the process of scanning, post-processing and further manipulation of three-dimensional models obtained with structured light scanners. Purpose. The purpose of the study is determined by the need for national archaeologists to learn the methods of three-dimensional modeling for the implementation of scientific research corresponding to international standards. Unfortunately, this direction in national archaeology began to develop in a relatively recent time and there is a lag in the application of three-dimensional modeling of national archaeology compared to the world level. Results. Any archaeological, experimental or ethnographic artifact can be used for three-dimensional scanning. To perform post-processing of three-dimensional models it is necessary to carry out primary scanning of an artifact by one of the existing algorithms. The algorithm for creating models, their positioning, simplification, saving in various formats and export is described. The main sequence of 3D models post-processing includes: processing of groups of scanned projections (their cleaning and alignment), creation of artifact model and processing/rectification of the resulting model using special software. Conclusion. As a result of correct implementation of the algorithm, the researcher receives a scaled model completely corresponding to the original artifact. Obtaining a scalable, texture-free three-dimensional model of the artifact, which fully corresponds to the original and exceeds a photograph in the quality of detail transfer, allows a scientist to conduct precise metric measurements and any procedures of non-invasive manipulation of the models. The ability to access a database of three-dimensional models of archaeological collections greatly simplifies the work of archaeologists, especially in situations when country borders are closed.

scholarly journals Three-dimensional engineering-geological model of the soil massif: the case study of the base of a hydrotechnical building

2018 ◽  
Vol 7 (1) ◽  
pp. 45
Author(s):  
Zhanghao Ren
Keyword(s):  
Three Dimensional ◽  
Geological Model ◽  
Sound Design ◽  
Three Dimensional Model ◽  
Construction Sites ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Geological Conditions ◽  
Dimensional Models ◽  
Three Dimensional Models

In the process of engineering and geological surveys, three-dimensional engineering-geological modeling makes it possible to perform a comprehensive assessment of the state of the territory for making sound-design decisions on the placement of construction sites and their structures. Secondly, a logical conclusion of a detailed study of engineering-geological and geotechnical conditions, which is implemented to use three-dimensional modeling, is a well-grounded design with a reasonable margin of safety, which causes a reduction in the total cost of the erected or reconstructed structure. Thirdly, in comparison with traditional engineering-geological two-dimensional models (cuts, maps, etc.), three-dimensional models give more information. This is especially important, when we think about the scale of the hydraulic structures. According to archival materials, it can be noted that there are many spatial geological heterogeneities in this territory, and the engineering-geological conditions turned out to be complex. Taking into account the advantages of three-dimensional modeling, the creation of a three-dimensional model of a dispersed soil massif is an actual task for solving complex engineering-geological problems. The article analyzes a three-dimensional engineering-geological model of the soil massif under a hydrotechnical building in the Moscow region, and then calculates its stress-strain state and the coefficient of stability of the sides of the ditch.

scholarly journals A behavioral box for tactile tasks discrimination

2020 ◽  
Author(s):  
Jose Wanderson Silva ◽  
Luiz Marcos Gonçalves
Keyword(s):  
Physical Simulation ◽  
Low Cost ◽  
Three Dimensional ◽  
Sensory System ◽  
Tactile Discrimination ◽  
Open Hardware ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Modeling Software ◽  
To Receive

Among the studies done with rodents, the behavioral ones stand out. To perform these studies, the behavioral boxes are commonly used. These are devices in which the rodents perform some task to receive a reward. These animals are considered excellent subjects for studying the tactile sensory system, since they use their whiskers to locate and discriminate objects. In this work the goal is studying the sensory system of rodents in tasks in which the animals must discriminate the width of an aperture, using only their whiskers to receive a reward. We aim to develop an automated open-hardware behavioral box to perform task of tactile discrimination in rodents. For such, we designed the box using a three-dimensional modeling software and its control is implemented with Arduino, which was tested in a computer model trhough physical simulation. All used components are low cost and can be found or developed in Brazil. The present study provides an important tool for the study of the tactile sensory system, that makes possible other laboratories to build their own behavior box for tactile studies.

Design and Entity Modeling of Wet Double Clutch

2012 ◽  
Vol 490-495 ◽  
pp. 2409-2413
Author(s):  
Xiao Lin Guo ◽  
Jia Ping Pan ◽  
Wei Sun ◽  
Gan Chen
Keyword(s):  
Heat Capacity ◽  
Three Dimensional ◽  
Friction Material ◽  
Friction Power ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Structural Dimensions ◽  
Modeling Software

In this paper, we calculates the main parameters of a c-class car, choose the friction material, confirm the structural dimensions of pivotal components, acquires the friction power and heat capacity, and design three kinds of wet double clutch arranged radially with hydraulic driving unit, arranged longitudinally with hydraulic driving unit and arranged longitudinally with mechanical driving unit respectively according to the dimensions of interspaces. Finally, the entity modeling of each structure is established through the three-dimensional modeling software.

Based on Pro/E and Ansys'Finite Element Analysis of Conveying Roller

2012 ◽  
Vol 271-272 ◽  
pp. 797-800
Author(s):  
Chan Juan Chen ◽  
Zhou Wen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Local Strain ◽  
Analysis Software ◽  
Roller Conveyor ◽  
Element Analysis ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Modeling Software

In order to study conveying roller force and improve its mechanical properties, we use three-dimensional modeling software Pro/E to build the solid model of the Apple box delivery device’s conveying roller. Using finite element analysis software Ansys to analyze conveying roller’s bending stress, we can get images of local strain and displacement contours .Contrasting with factory’s broken roller conveyor, we can find that: through the establishment of appropriate boundary conditions, Ansys can accurate finite element analysis, and provide the basis for the conveying roller structure improvements.

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