scholarly journals Solving the problem of optimizing the cutting of wood whips with curvature

2021 ◽  
Vol 875 (1) ◽  
pp. 012009
Author(s):  
A Gudkov
Keyword(s):  
Computer Aided Design ◽  
Modern Theory ◽  
High Quality ◽  
Stem Wood ◽  
Computer Aided ◽  
Aided Design ◽  
Theory Of Graphs ◽  
Round Timber ◽  
Production Conditions ◽  
Theoretical Developments

Abstract Stem wood, obtained from the cuttings of care in low-forest areas is of low quality. Such wood has a number of vices, one of which is simple curvature, which has impact on the voluminous and commercial output of round timber. Reducing this influence can be achieved through high-quality bucking. Therefore, the purpose of the work presented is to increase the volume and commercial output of round timber harvested in low-forest areas. The developed technique using computers allows to solve the tasks of modeling the shape of wood whips and logs using multi-critical optimization and bucking whips having curvature. The use of the proposed technique allows for results adequate to the real production conditions, as evidenced by the methods of decision-making used. Scientific research and theoretical developments, taking into account the formed database, allowed to search for the optimal scheme of cutting when bucking round timber, performed according to the algorithm based on the busting of acceptable variants using modern theory of graphs and matrixes. As a result, the developed program will reduce the time for data formation, guarantee the accuracy of the results, the program easily adapts to natural and production conditions and will expand the possibilities for Computer-aided design.

scholarly journals Computer Generation of Birds of a Feather Puzzles

2019 ◽  
Vol 33 ◽  
pp. 9693-9699
Author(s):  
Todd W. Neller ◽  
Daniel Ziegler
Keyword(s):  
Combinatorial Optimization ◽  
Objective Function ◽  
Recent Work ◽  
Design Process ◽  
Computer Aided Design ◽  
High Quality ◽  
Computer Aided ◽  
Iterative Improvement ◽  
Aided Design ◽  
Computer Generation

In this article, we describe a computer-aided design process for generating high-quality Birds of a Feather solitaire card puzzles. In each iteration, we generate puzzles via combinatorial optimization of an objective function. After solving and subjectively rating such puzzles, we compute objective puzzle features and regress our ratings onto such features to provide insight for objective function improvements. Through this iterative improvement process, we demonstrate the importance of the halfway solvability ratio in quality puzzle design. We relate our observations to recent work on tension in puzzle design, and suggest next steps for more efficient puzzle generation.

Application and Research of the Design Process of Concept A-Surface

2012 ◽  
Vol 628 ◽  
pp. 229-239 ◽  
Author(s):  
Xi Yuan Wang ◽  
Ying Jie Li ◽  
Xiaom Wen Xu ◽  
Jian Chen Han
Keyword(s):  
Engineering Design ◽  
Computer Aided Design ◽  
Process Model ◽  
Digital Model ◽  
Current Status ◽  
Basic Process ◽  
High Quality ◽  
Digital Modeling ◽  
Computer Aided ◽  
Aided Design

This paper narrates the basic principle of the computer aided design for car styling and analyzes the current status of building the high-quality surfaces in the computer aided design for car styling and “the basic process model of digital car styling” .to build “the sbasic process model based on CAS digital modeling. It points out the research content and method of the car digital model and provides theoretical basis for the research of the car styling digital model. In the conventional early design of car styling, generally the revision of design schemes consumes much time and energies. Revisions have been continuously made from the initial creative idea to the later clay model before entering into the engineering design. With the rapid development of the computer technology, the digital technology has become the leading one for the car styling development. During the design process, the digital design of car styling has evolved from the rendering into the engineering design. In order to convey the styling idea that expresses in the design sketch in a rapid and accurate way, it requires a clear expression system and based on the system, the digital model is made. Otherwise, even the good modeling technology and the high-quality surfaces become useless without clearly expressing the idea. The computer aided design for car styling is advanced, but there still exist many problems. The paper aims to put forward a rapidly modeling method of high quality car surfaces based on digital modeling and explore its feasibility during the actual application, by analyzing the current status of building the high-quality surfaces in the computer aided design for car styling and the basic process of the computer aided design for car styling and discussing problems existed during the expression of the design, as well as combining other methods of the computer aided design in other fields.

scholarly journals The Research of the Possibilities and Application of the AutoCAD Software Package for Creating Electronic Versions of Textbooks for "Engineering and Computer Graphics" Course

TEM Journal ◽  
2020 ◽  
pp. 1141-1149
Author(s):  
Alexey L. Khoroshko
Keyword(s):  
Computer Graphics ◽  
Training Program ◽  
Computer Aided Design ◽  
Software Package ◽  
High Quality ◽  
Cad Systems ◽  
Cad System ◽  
Technical Performance ◽  
Computer Aided ◽  
Aided Design

In this paper there are examples showing that AutoCAD (computer-aided design (CAD)) was and still is a powerful tool for technical graphics. Since Autodesk is a pioneer in the market of commercial widely available CAD systems, in this company CAD principles (which can be used by relatively unprepared users), nature and volume of teams, sequence and features of their implementation were developed. Despite the fact that today AutoCAD is only one of many packages, and its use as a training program guarantees not only high-quality training of specialists, but also the fact that the employee can easily switch to another CAD system, intuitively understanding the principles of function. In terms of technical performance, AutoCAD is a complete tool covering the entire spectrum of functions in the field of "Engineering and Computer Graphics" course.

scholarly journals Mail-order Custom Landscape Plans

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 650g-651
Author(s):  
Walt Ray
Keyword(s):  
Computer Aided Design ◽  
Landscape Design ◽  
Good Knowledge ◽  
Mail Order ◽  
The South ◽  
High Quality ◽  
Residential Landscape ◽  
Computer Aided ◽  
Aided Design

Americans' growing appreciation for excellent landscape design is creating a great need for reputable designers in the residential landscape design industry. Technology affords landscape planners the ability to fill that need with personalized landscape designs through the mail. The use of disposable cameras, overnight mail, computer aided design, computer rendering, telephone, and fax all makes it possible for a designer to acquire a good knowledge of a particular site, quickly design an accurate, high quality landscape design, do several revisions to that design, and give the client a timely return of the design. Southern Living magazine's new department, Custom Landscape Plans, headed by Rebecca Bull, is one example of how this is done. Through a graduate assistantship with Southern Living, I can use these available technologies to design personalized landscape plans all over the south from my office at Clemson Univ. The methods of mail-order landscape design will be discussed in a verbal presentation.

Computer Aided Design of Internal Involute Spur Gears

1988 ◽  
Author(s):  
Chung-Biau Tsay
Keyword(s):  
Mathematical Model ◽  
Computer Aided Design ◽  
Gear Tooth ◽  
Gear Train ◽  
Modern Theory ◽  
Spur Gears ◽  
Tooth Contact Analysis ◽  
Computer Aided ◽  
Tooth Surfaces ◽  
Aided Design

Abstract The modern theory of gearing provides principles of generation for conjugate gear tooth surfaces while computer aided design is a very powerful tool in designing a gear train with conjugate shaped tooth surfaces. It is possible to set up a mathematical model for internal involute spur gears if the theory of gearing and the concept of differential geometry together with computer aided design technique have been applied. The derived mathematical model of internal involute spur gears can be used for computer simulation of conditions of meshing, tooth contact analysis, stress analysis, dynamic analysis, lubricating analysis, and wearing analysis of the gear train. This paper covered the solutions to the following problems : (a) method of generation for internal spur gears with conjugate tooth surfaces; (b) derivation of equations for gear tooth surfaces and their surface unit normals; and (c) computer graphics of generated internal involute spur gears.

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