An anomalous trade-off effect on the properties of smart ortho-functional benzoxazines

2015 ◽  
Vol 6 (13) ◽  
pp. 2541-2550 ◽  
Author(s):  
Kan Zhang ◽  
Hatsuo Ishida
Keyword(s):  
Basic Design ◽  
Design Rules ◽  
Trade Off

A series of ortho-difunctional benzoxazine monomers containing amide, imide and amide–imide groups have been synthesized in order to obtain basic design rules toward preparing higher performance polybenzoxazoles based on smart benzoxazine chemistry.

scholarly journals A Lever-Type Method of Strain Exposure for Disk F-Shaped Torque Sensor Design

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 541
Author(s):  
Ran Shu ◽  
Zhigang Chu ◽  
Hongyu Shu
Keyword(s):  
Uniaxial Tension ◽  
Deformation Mode ◽  
Strain Gauges ◽  
Basic Design ◽  
Torque Sensor ◽  
Type Method ◽  
Trade Off ◽  
Tension And Compression ◽  
Design Idea ◽  
Robotic Joints

Disk-shaped torque sensors are widely used in robotic joints and wheel driving. However, in terms of conventional spoke-type geometries, there is always a trade-off between sensitivity and stiffness, because their strain exposure depends upon a bending deformation mode which causes strain nonuniformity. This paper presents a lever-type method of strain exposure that performs a uniaxial tension and compression deformation mode to optimize the strain uniformity and improve the trade-off. Moreover, on the basis of this approach, the proposed disk F-shaped torque sensor enjoys has axial thinness, easy installation of strain gauges and flexible customization. The simulation and experimental results have validated the basic design idea.

Multi-Objective Design Exploration of a Centrifugal Impeller Accompanied With a Vaned Diffuser

2007 ◽  
Author(s):  
Kazuyuki Sugimura ◽  
Shigeru Obayashi ◽  
Shinkyu Jeong
Keyword(s):  
Data Mining ◽  
Rough Set Theory ◽  
Centrifugal Impeller ◽  
Centrifugal Blower ◽  
Design Rules ◽  
Vaned Diffuser ◽  
Trade Off ◽  
Multi Objective ◽  
Multi Objective Genetic Algorithm ◽  
Design Variables

The problem of designing a centrifugal blower was explored using multi-objective genetic algorithm and data mining techniques. Blade-to-blade regions of an impeller and a diffuser were modeled and time-averaged non-uniform inflow to the diffuser was considered. The design objectives were blower efficiency and uniformity of the inflow to the diffuser. The impeller’s shape was represented by NURBS curves and then optimized. The obtained non-dominated solutions showed a trade-off relationship and the design variables controlling the trade-off were found to be related to the dimensions of the vane-less diffuser and the load balance of the impeller. We also applied Decision Tree Analysis and Rough Set Theory to reveal design rules, which led to good performance. Although the design rules derived from the optimization result and data mining results partly agreed with each other, we also clarified that there were some differences due to the characteristics of the data mining methods we used.

Neural Network Models for the Estimation of Product Costs

2006 ◽  
pp. 199-220
Author(s):  
Sergio Cavalieri ◽  
Paolo Maccarrone ◽  
Roberto Pinto
Keyword(s):  
Neural Network ◽  
Production Cost ◽  
Network Models ◽  
The Other ◽  
Design Phase ◽  
Neural Network Models ◽  
Design Rules ◽  
Trade Off ◽  
And Performance ◽  
Product Costs

The estimation of the production cost per unit of a product during its design phase can be extremely difficult, especially if information about previous similar products is missing. On the other hand, most of the costs that will be sustained during the production activity are implicitly determined mainly in the design phase, depending on the choice of characteristics and performance of the new product. Hence, the earlier the information about costs becomes available, the better the trade-off between costs and product performances can be managed. These considerations have led to the development of different design rules and techniques, such as Design to Cost, which

Basic Design Rules for Lines in Pulsating Flow Service

2019 ◽  
Author(s):  
Menno Eijgenhuijsen ◽  
Girish Masand
Keyword(s):  
Natural Frequency ◽  
Late Stage ◽  
Mechanical Response ◽  
Response Analysis ◽  
Piping System ◽  
Basic Design ◽  
Significant Delay ◽  
Process Information ◽  
Design Rules ◽  
Simple Set

Abstract To avoid unacceptable vibration of suction and discharge piping for reciprocating pumps and compressors, acoustic and mechanical response analyses are to be carried out. These analyses are generally provided by the suppliers of such equipment. This paper explains the fundamentals behind an acoustic and mechanical response analysis and provides a simple set of consolidated design and engineering rules. The paper encourages application of these rules while developing the equipment and piping layout as well as pipe support configuration. The aim of these rules is to minimize the chance for the ultimate supplier’s detailed acoustic & mechanical response analysis to recommend significant changes to the design in a late stage of a project. Specific emphasis is placed on how the support stiffness affects the natural frequency of the piping system and a practical methodology is provided to account for this in pipe support span calculations. This paper also describes the process information that needs to be submitted to the supplier to conduct a meaningful acoustic as well as mechanical response analysis. Acknowledging requirements for lines in pulsating service at a late stage in the project, not providing the supplier with the required process information or a piping and support configuration that is not ‘mature’ enough will most likely result in significant delay and cost.

On the Axiomatic Foundation of Design

1993 ◽  
Author(s):  
Andrew D. Dimarogonas
Keyword(s):  
Design Methodology ◽  
Mechanical Design ◽  
Design Principles ◽  
Aesthetic Theory ◽  
Basic Design ◽  
Total Quality ◽  
Ancient Greek ◽  
Design Rules ◽  
Machine Element ◽  
Design And Manufacturing

Abstract Mechanical design methodology has its origins in the writings of ancient Greek and Alexandrine authors between 300 BC and 100 AD when also the first aesthetic theory was proposed. German authors of the middle of 19th Century have introduced the foundation for Mechanical Design on basic Design Principles, modernized the machine element methodology and introduced the parallel development of the function with the form. F. Redtenbacher introduced a set of design principles. Reuleaux (1852) introduced two fundamental Design Principles (Ground Rules), re-introduced recently in axiomatic form by Suh et al. The paper discusses the merits of establishing Design Principles or Design Axioms as the fundamental Rules of design and the implications of these Rules on the design and manufacturing methodology. The relation of the Design Rules with the principles of the total quality engineering in the Taguchi sense is also investigated.

scholarly journals Basic design rules of unit cells for additive manufactured lattice structures

2017 ◽  
Vol 137 ◽  
pp. 02005 ◽  
Author(s):  
Julia Kessler ◽  
Nicolae Balc ◽  
Andreas Gebhardt ◽  
Karim Abbas
Keyword(s):  
Lattice Structures ◽  
Basic Design ◽  
Design Rules ◽  
Unit Cells

A Flow-Preserving Algorithm for the Time-Cost Trade-Off Problem

1982 ◽  
Vol 14 (2) ◽  
pp. 109-113 ◽  
Author(s):  
Suleyman Tufekci
Keyword(s):  
Time Cost ◽  
Trade Off

Dual Goals for Speed and Accuracy on the Same Performance Task

2012 ◽  
Vol 11 (3) ◽  
pp. 118-126 ◽  
Author(s):  
Olive Emil Wetter ◽  
Jürgen Wegge ◽  
Klaus Jonas ◽  
Klaus-Helmut Schmidt
Keyword(s):  
Memory Scanning ◽  
Performance Task ◽  
Performance Tasks ◽  
Trade Off ◽  
Test Experiment ◽  
Trade Offs ◽  
New Finding ◽  
Sternberg Paradigm ◽  
Speed Accuracy ◽  
Speed And Accuracy

In most work contexts, several performance goals coexist, and conflicts between them and trade-offs can occur. Our paper is the first to contrast a dual goal for speed and accuracy with a single goal for speed on the same task. The Sternberg paradigm (Experiment 1, n = 57) and the d2 test (Experiment 2, n = 19) were used as performance tasks. Speed measures and errors revealed in both experiments that dual as well as single goals increase performance by enhancing memory scanning. However, the single speed goal triggered a speed-accuracy trade-off, favoring speed over accuracy, whereas this was not the case with the dual goal. In difficult trials, dual goals slowed down scanning processes again so that errors could be prevented. This new finding is particularly relevant for security domains, where both aspects have to be managed simultaneously.

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