10,893 research outputs found
Automatic Structural Scene Digitalization
In this paper, we present an automatic system for the analysis and labeling
of structural scenes, floor plan drawings in Computer-aided Design (CAD)
format. The proposed system applies a fusion strategy to detect and recognize
various components of CAD floor plans, such as walls, doors, windows and other
ambiguous assets. Technically, a general rule-based filter parsing method is
fist adopted to extract effective information from the original floor plan.
Then, an image-processing based recovery method is employed to correct
information extracted in the first step. Our proposed method is fully automatic
and real-time. Such analysis system provides high accuracy and is also
evaluated on a public website that, on average, archives more than ten
thousands effective uses per day and reaches a relatively high satisfaction
rate.Comment: paper submitted to PloS On
Recommended from our members
From on-line sketching to 2D and 3D geometry: A fuzzy knowledge based system
The paper describes the development of a fuzzy knowledge based prototype system for conceptual design. This real time system is designed to infer user’s sketching intentions, to segment sketched input and generate corresponding geometric primitives: straight lines, circles, arcs, ellipses, elliptical arcs, and B-spline curves. Topology information (connectivity, unitary constraints and pairwise constraints) is received dynamically from 2D sketched input and primitives. From the 2D topology information, a more accurate 2D geometry can be built up by applying a 2D geometric constraint solver. Subsequently, 3D geometry can be received feature by feature incrementally. Each feature can be recognised by inference knowledge in terms of matching its 2D primitive configurations and connection relationships. The system accepts not only sketched input, working as an automatic design tools, but also accepts user’s interactive input of both 2D primitives and special positional 3D primitives. This makes it easy and friendly to use. The system has been tested with a number of sketched inputs of 2D and 3D geometry
CAD/CAM, CNC TECHNOLOGY APPLIED IN THE FIELD OF ENGINEERING, SECURITY TECHNOLOGY AND MECHANICAL ENGINEER TRAINING I.
In the last decades the spectacular results of each
developmental stages of
computer-aided design, were considered as great magic of
computer use.
Professionals were shocked by the impressive building of
engineer works and
their more and more realistic appearance. It was hard to believe
and for many
people it still is that this technology becomes indispensable in
everyday
engineering work. By now, in front-rank product development, it
is impossible to
do a competitive designer work without applying the most up-to-
date design
technology. This all leads to the fact that an engineer student
of our days, in his
design practice, is definitely going to work with the
momentarily most up-to-date
technology, which will be out-of-date in a couple of years. |
A számĂtĂłgĂ©pek alkalmazásának nagy varázslatai közĂ© számĂtott az
elmĂşlt
Ă©vtizedekben a számĂtĂłgĂ©pen vĂ©gzett tervezĂ©s egy-egy fejlıdĂ©si
szakaszának
látványos eredménye. Szakembereket is meghökkentett a mérnöki
alkotások
látványos Ă©pĂtĂ©se Ă©s mind valĂłsághĹ‘bb megjelenĂtĂ©se. Nehezen
hitték, sıt sokan
ma is nehezen hiszik azt, hogy a mérnöki munka mindennapjaiban
is
nélkülözhetetlenné válik ez a technika. Mára az élvonalbeli
termékfejlesztésben a
mindenkori legjobb tervezési technika igénybevétele nélkül
képtelenség
versenyképes tervezımunkát végezni. Ennek következtében napjaink
mérnökhallgatója tervezıi gyakorlatában minden bizonnyal a ma
legkorszerĹ‘bbnek számĂtĂł, de nĂ©hány Ă©v alatt elavulĂł mĂłdszert
leváltó
technikával fog dolgozni.
Keywords/kulcsszavak: computer aided design, CAD1/CAM2, CNC3 ~
számĂtĂłgĂ©pes tervezĂ©s, CAD/CAM, CN
Computer aided inspection procedures to support smart manufacturing of injection moulded components
This work presents Reverse Engineering and Computer Aided technologies to improve the inspection of injection moulded electro-mechanical parts. Through a strong integration and automation of these methods, tolerance analysis, acquisition tool-path optimization and data management are performed. The core of the procedure concerns the automation of the data measure originally developed through voxel-based segmentation. This paper discusses the overall framework and its integration made according to Smart Manufacturing requirements. The experimental set-up, now in operative conditions at ABB SACE, is composed of a laser scanner installed on a CMM machine able to measure components with lengths in the range of 5Ă·250 mm, (b) a tool path optimization procedure and (c) a data management both developed as CAD-based applications
Data capture from engineering drawings
Call number: LD2668 .T4 1985 S574Master of Scienc
The DAB model of drawing processes
The problem of automatic drawing was investigated in two ways. First, a DAB model of drawing processes was introduced. DAB stands for three types of knowledge hypothesized to support drawing abilities, namely, Drawing Knowledge, Assimilated Knowledge, and Base Knowledge. Speculation concerning the content and character of each of these subsystems of the drawing process is introduced and the overall adequacy of the model is evaluated. Second, eight experts were each asked to understand six engineering drawings and to think aloud while doing so. It is anticipated that a concurrent protocol analysis of these interviews can be carried out in the future. Meanwhile, a general description of the videotape database is provided. In conclusion, the DAB model was praised as a worthwhile first step toward solution of a difficult problem, but was considered by and large inadequate to the challenge of automatic drawing. Suggestions for improvements on the model were made
Goods and services tax (GST) on construction capital cost and housing property price
Good and Service Tax (GST) an indirect broad-based conswnpti.on tax. Following with the implementation of GST in Malaysia on 1st April 2015, it is suspected that the construction capital cost and housing property price will increase accordingly. This study is aim to review the GST effect associated on construction capital cost and it influences towards housing developer and housing property price. Additionally, this study highlights what was the developer point of view on the GST given to them and also the housing price further proposes initiatives to the housing developers. Argument of GST effect is useful for the public administrators so that to re-consider the rate of GST and also beneficial to the construction parties to account with the GST implementation. As conclusion, this study review that GST do give an impact towards the construction capital cost, housing developer and housing property price in terms of knock-on effect
Effect of PAO-based Îł-Fe2O3 and surfactant concentration on viscosity characteristic
This is a preliminary study on the viscosity characteristics of polyalphaolefin (PAO)- based Îł-Fe2O3 under zero magnetic fields. By varying the concentration of magnetic nanoparticles (MNPs), PAO-based Îł-Fe2O3 with different concentrations were synthesized by co-precipitation method. The effect of this factor on the viscosity characteristic of Îł-Fe2O3 (< 30 nm) was investigated on the basic of a series of rheological measurement. The use of oleic acid (OA) as a coating agent and surfactant was also investigated by varying its concentration. The results show the concentration of MNPs and the amount of OA has obvious effect on viscosity characteristics of PAO-based Îł-Fe2O3. In the case of comparison between the concentrations of MNPs, higher concentration of MNPs increased the viscosity of the PAO-based Îł-Fe2O3 and exhibit nearly Newtonian behavior. The large amount of OA also exhibits the increment on viscosity characteristic of MNPs. The experimental data were compared with the Bingham and Casson model and the results revealed that the rheology of the polyalphaolefin (PAO)-based Îł-Fe2O3 fitted the Casson model better
- …