scholarly journals Performance-based Design

2011 ◽  
Author(s):  
Daniel Baerlecken ◽  
◽  
Judith Reitz ◽  
Martin Manegold ◽  
Arne Kuenstler ◽  
...  
Keyword(s):  
Feedback Loop ◽  
Planning Process ◽  
Structural Information ◽  
Parametric Modeling ◽  
Performance Based Design ◽  
Timely Manner ◽  
Related Factors ◽  
Rough Form ◽  
Cad Cam ◽  
Design Consistency

Michalatos and Kaijima underline in their paper ‘Structural Information as Material for Design’ (2007) the importance to approach an informed design consistency and respect the “criteria of efficiency, architectural intentions as well as intrinsic properties of the geometry” rather than simple structural optimization of a certain design. Our paper investigates this consistency between architecture and structure within the framework of parametric modeling, which requires architects, engineers and constructors to re-evaluate the feedback loop between how things are designed and constructed. As Mario Carpo (2008) points out CAD and CAM technologies have overthrown the “Albertian Paradigm” which claims that architects should not make things, but should just design and annotate them. As digital tools can be used to design and fabricate at the same time, CAD-CAM technologies have already started to bridge the gap between designers and makers. One of the most influential form related factors on the lighting situation inside the building is – due to its shading behaviour – the dimension and position of the supporting structure of the façade. It is important to investigate these positions at the beginning in-depth, since they serve as hypothesis for the entire planning process. In order to compare a catalogue of various design approaches and different designs in a timely manner, a parametric model has been built defining the rough form of the design.

Parametric Modeling CAD-CAM of the Ankle and Pathological Related Situations

2014 ◽  
Vol 657 ◽  
pp. 740-744
Author(s):  
Iulia Huzu ◽  
Nicolae Florin Cofaru
Keyword(s):  
Healthy Subject ◽  
3D Model ◽  
Treatment Strategies ◽  
Parametric Modeling ◽  
Cad System ◽  
Primary Object ◽  
Graphic Modeling ◽  
The Status ◽  
Modeling Software ◽  
Cad Cam

It is primary object of the present study to create a 3D model of the human ankle and an axis system that will show the position the tibia and the foot on a healthy subject. Regarding this scope of the study, the first step in obtaining the 3D model of the bones is scanning. The graphic modeling software used is Catia V5 R20. It is another object of the present study to create an axis system that will be very easy to maneuver and on which we can show different pathological situations, not only on a healthy subject, creating their assembly reference systems considering the mechanical and anatomical axes existing and creating prerequisites for the study of different possible pathological situations. For this scope, was used a triorthogonal axis system called skeleton that is defined as a system of axes Euler. This means that the angles can change the grid, in the desire to analyze different situations. In this study the focus is on the situation of varus equinus, in which the foot leg is not aligned with the tibia, as it is on a healthy subject. It was realized an important element: the incorporation of geometric and dimensional references. The last object in this study is to determine the status of CAE, in order to study the stress and the strain. Creating the CAD system is very important because it can be used to study the osteoarticular system, treatment strategies and related surgery.

scholarly journals SPECIFIC FEATURES OF PRODUCING SEPARATE INVESTIGATIVE ACTIONS IN INVESTIGATING CRIMES OF AN EXTREME ORIENTAL AND TERRORIST IN CONDITIONS OF SOCIAL TENSION

2021 ◽  
Vol 6(72) (3) ◽  
pp. 381-390
Author(s):  
A.N. Ignatov ◽  
S.A. Toropov
Keyword(s):  
Planning Process ◽  
The Other ◽  
Timely Manner ◽  
Social Tension ◽  
Other Hand ◽  
The One ◽  
Inspection Of The Scene

Terrorism and extremism are closely related to social tension, on the one hand, significantly increasing its level, on the other hand, using this factor to achieve their criminal goals. The conditions of social tension are a factor that determines the need to make adjustments to typical algorithms for investigating crimes of an extremist and terrorist nature in order to build versions in a timely manner at the initial and subsequent stages of the investigation, optimize the planning process on the case, and implement investigative actions, including in conditions of opposition from stakeholders. persons. The features of the production of such investigative actions in the investigation of crimes of an extremist and terrorist nature in conditions of social tension, such as an inspection of the scene, search, interrogation, as well as some features of the appointment and production of expert examinations.

CAD/CAE Integration System of Mechanical Parts

2011 ◽  
Vol 338 ◽  
pp. 272-276 ◽  
Author(s):  
Ai Min Ji ◽  
Kun Zhu ◽  
Ji Cheng Huang ◽  
Yi Pei Dong
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Parametric Design ◽  
Parametric Modeling ◽  
Cad Model ◽  
Element Analysis ◽  
Integration System ◽  
Mechanical Parts ◽  
Modeling Technology ◽  
Cad Cam

The key technologies of CAD/CAM integration of mechanical parts which include parametric modeling technology, model transformation of CAD/CAE and finite element modeling were studied. Based on redevelopment of UG, the process of parametric modeling about typical part was achieved. The identification, selection, extraction, and removal of the details in the CAD model were analyzed. The extraction approach of the mid-surface in the dimensional reduction of the CAD model was executed. The CAD/CAE integration system of the design and finite element analysis for mechanical parts was established by the redevelopment of UG and ANSYS with Visual C++, UG/Open and APDL as tools. The parametric design and automatic finite element analysis for mechanical parts were implemented.

scholarly journals Devising a concept of integrated design and modeling of aircraft

2021 ◽  
Vol 5 (1(113)) ◽  
pp. 15-23
Author(s):  
Oleksandr Grebenikov ◽  
Andrii Humennyi ◽  
Oleksandr Dveirin ◽  
Oleksandr Soboliev ◽  
Lilia Buival
Keyword(s):  
Three Dimensional ◽  
Integrated Design ◽  
Aircraft Design ◽  
Parametric Modeling ◽  
Parametric Models ◽  
Space Distribution ◽  
Design Parameters ◽  
Combat Aircraft ◽  
Cad Cam ◽  
And Training

The analysis of aircraft design methods reported here has revealed that building a competitive aircraft necessitates devising a scientifically based concept of integrated aircraft design employing CAD/CAM/CAE/PLM software suites. A generalized concept of integrated design and three-dimensional computer modeling of aircraft involving the CAD/CAM/CAE/PLM systems has been developed. Based on the proposed concept, the principles of integrated design of aircraft were devised. The features of designing the training and training-combat aircraft, transport-category aircraft, light civilian aircraft have been described. A method for determining the take-off weight, design parameters, and formation of the general appearance of aircraft has been improved. The method is intended to form the appearance of the aircraft at the stages of preliminary design, the purpose of which is reduced to determining the permissible version of the aircraft project. The project must meet the predefined requirements and restrictions in the selected aircraft scheme and the assigned set of parameters that characterize its airframe and power plant. A method of parametric modeling of aircraft has been improved, which includes the stages of creating a master geometry of the aircraft and a model of space distribution. Parametric models of master geometry and models of space distribution, training and training-combat aircraft, transport-category aircraft, light civilian aircraft have been constructed. Methods of integrated design of aircraft main units have been devised and theoretically substantiated. Parametric models of master geometry of the wing for a training aircraft, the wings, appendage, and fuselage of a light civilian aircraft were built, taking into consideration the design features of aircraft units of various categories

scholarly journals Word synonym relationships for text analysis: A graph-based approach

PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0255127
Author(s):  
Hend Alrasheed
Keyword(s):  
Text Mining ◽  
Community Detection ◽  
Text Analysis ◽  
Structural Information ◽  
Text Summarization ◽  
Keyword Extraction ◽  
Graph Analysis ◽  
Extraction Techniques ◽  
Timely Manner ◽  
Document Categorization

Keyword extraction refers to the process of detecting the most relevant terms and expressions in a given text in a timely manner. In the information explosion era, keyword extraction has attracted increasing attention. The importance of keyword extraction in text summarization, text comparisons, and document categorization has led to an emphasis on graph-based keyword extraction techniques because they can capture more structural information compared to other classic text analysis methods. In this paper, we propose a simple unsupervised text mining approach that aims to extract a set of keywords from a given text and analyze its topic diversity using graph analysis tools. Initially, the text is represented as a directed graph using synonym relationships. Then, community detection and other measures are used to identify keywords in the text. The set of extracted keywords is used to assess topic diversity within the text and analyze its sentiment. The proposed approach relies on grouping semantically similar candidate words. This approach ensures that the set of extracted keywords is comprehensive. Differing from other graph-based keyword extraction approaches, the proposed method does not require user parameters during graph construction and word scoring. The proposed approach achieved significant results compared to other keyword extraction techniques.

scholarly journals Development and Experimental Verification of a Generative CAD/FEM Model of an External Fixation Device

2020 ◽  
Vol 14 (1) ◽  
pp. 1-6
Author(s):  
Elmedin Mešić ◽  
Adil Muminović ◽  
Mirsad Čolić ◽  
Marin Petrović ◽  
Nedim Pervan
Keyword(s):  
Experimental Verification ◽  
Testing Machine ◽  
Parametric Modeling ◽  
Experimental Investigations ◽  
Fixation Device ◽  
Connecting Rod ◽  
Principal Stresses ◽  
Fem Model ◽  
Cad Cam ◽  
Von Mises

This paper presents the development and experimental verification of a generative CAD/FEM model of an external bone fixation device. The generative CAD model is based on the development of a parameterized skeleton algorithm and sub-algorithms for parametric modeling and positioning of components within a fixator assembly using the CATIA CAD/CAM/CAE system. After a structural analysis performed in the same system, the FEM model was used to follow interfragmentary fracture displacements, axial displacements at the loading site, as well as principal and Von Mises stresses at the fixator connecting rod. The experimental analysis verified the results of the CAD/FEM model from an aspect of axial displacement at the load site using a material testing machine (deviation of 3.9 %) and the principal stresses in the middle of the fixator connecting rod using tensometric measurements (deviation of 3.5 %).The developed model allows a reduction of the scope of preclinical experimental investigations, prediction of the behavior of the fixator during the postoperative fracture treatment period and creation of preconditions for subsequent structural optimization of the external fixator.

Application of Pro/Engineer in Mug Product Development and Mould Design

2014 ◽  
Vol 722 ◽  
pp. 254-257
Author(s):  
Feng Chen
Keyword(s):  
High Efficiency ◽  
Parametric Design ◽  
Three Dimensional ◽  
Parametric Modeling ◽  
Mold Design ◽  
Product Modeling ◽  
Modeling Technology ◽  
Cad Cam ◽  
Mould Design ◽  
New Generation

Pro/E was developed by the American company PTC CAD / CAM software, it is a new generation product modeling system with features as parametric design, three-dimensional solid model, feature-driven and single database. Pro/E software uses object-oriented unified database and parametric modeling technology, which has conceptual design, basic design and detailed design features,and provides excellent platforms for integrated manufacturing molds.Take Mug for example, the process of product modelling and mold design used by Pro/E software was introduced. The mold design cycle , the parting surface, the mold die space and the core was focused. The high efficiency characteristic of plastic mold design used by Pro/E was elaborated.

scholarly journals Parametric Modeling for Form-Based Planning in Dense Urban Environments

2019 ◽  
Vol 11 (20) ◽  
pp. 5678
Author(s):  
Zhang ◽  
Liu
Keyword(s):  
Real Time ◽  
Planning Process ◽  
Complex Form ◽  
Urban Environments ◽  
Parametric Modeling ◽  
Coding System ◽  
Urban Forms ◽  
Real Time Visualization ◽  
Planning Processes

Parametric instruments are employed broadly across the building industry. The study of applying parametric techniques to sustainable form-based planning, however, remains insufficient. This paper therefore critically assesses parametric techniques for facilitating form-based planning in an urban environment. The analysis is to twofold: Can a parametric technique truly enhance the form-based planning process more effectively than existing planning processes? and By what means can form-based planning layouts derived from parametric techniques be appraised? Methodologies include a case study in Hong Kong, quantitative and qualitative analysis, and experimental modeling on parametric platforms. Results indicate that the urban forms can be visualized in real-time during planning processes with a parametric coding system. Existing planning processes do not benefit from real-time visualization, but these alone do not necessarily result in more rational planning layouts. Parametric techniques produce visual models effectively but are not a planning panacea. Findings include a criticism of parametric techniques and pertinent instruments in urban projects, as well as valuable insights for the study of complex form-based planning in dense urban socio-environments.

Automatic Extraction and Synthesis of Disassembly Information From CAD Assembly STEP File

2016 ◽  
Author(s):  
Pushkar Vyas ◽  
Jeremy L. Rickli
Keyword(s):  
Optimization Methods ◽  
Relevant Information ◽  
Automatic Extraction ◽  
Timely Manner ◽  
The Past ◽  
Manual Analysis ◽  
Contact Information ◽  
Cad Cam ◽  
Product Disassembly ◽  
Product Assembly

Product disassembly is critical to remanufacturing, reuse, and recycling activities, which are essential reverse flows in circular economy systems. While disassembly optimization and analysis methods are well developed, many of these methods rely on basic disassembly information, i.e. a precedence matrix. Obtaining this basic disassembly information is a non-trivial task that has, in the past, required extensive manual analysis of a product assembly. This process can be significantly improved by developing methods capable of automatically extracting disassembly data from CAD/CAM assemblies. If this can be achieved accurately, efficiently, and in a timely manner, numerous disassembly optimization methods will become readily available to product designers. In pursuit of this aim, the objective of this research is to automatically extract part contact information from assembly models and determine disassembly operation feasibility. The described method uses CAD assembly STEP data as input, extracts disassembly relevant information such as, component surface contour type, Cartesian points, and normal direction of the surface, and determines the feasibility of disassembly of each component which is represented as a precedence matrix. Disassembly feasibility is evaluated using the contact function. A case assembly was tested and the precedence matrix was successfully determined for part contact disassembly constraints. Results of the research indicate that the method is capable of extracting disassembly data from CAD STEP assemblies but has critical limitations that must be overcome to be influential during design.

Measurement and Reduction of Radiation Damage in Frozen Hydrated Crystalline Specimens

1978 ◽  
Vol 36 (3) ◽  
pp. 70-77 ◽  
Author(s):  
R.M. Glaeser ◽  
S.B. Hayward
Keyword(s):  
Diffraction Pattern ◽  
Structural Information ◽  
Structural Disorder ◽  
Structural Features ◽  
Biological Macromolecules ◽  
Diffraction Intensity ◽  
Object Structure ◽  
Specimen Material ◽  
Unit Cells ◽  
Identical Unit

Highly ordered or crystalline biological macromolecules become severely damaged and structurally disordered after a brief electron exposure. Evidence that damage and structural disorder are occurring is clearly given by the fading and eventual disappearance of the specimen's electron diffraction pattern. The fading and disappearance of sharp diffraction spots implies a corresponding disappearance of periodic structural features in the specimen. By the same token, there is a oneto- one correspondence between the disappearance of the crystalline diffraction pattern and the disappearance of reproducible structural information that can be observed in the images of identical unit cells of the object structure. The electron exposures that result in a significant decrease in the diffraction intensity will depend somewhat upon the resolution (Bragg spacing) involved, and can vary considerably with the chemical makeup and composition of the specimen material.

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