Geometric Curve Design Method of Fuzzy Reliability Based on Random Processing Errors

2011 ◽  
Vol 199-200 ◽  
pp. 72-77
Author(s):  
Zhi Su Zhao ◽  
Xing Hua Zhang
Keyword(s):  
Design Method ◽  
Failure Process ◽  
Point Of View ◽  
Design Stage ◽  
Gradual Change ◽  
Fuzzy Reliability ◽  
Reliability Design ◽  
Curve Design ◽  
Processing Errors ◽  
The Impact

In order to foresee the influence of random processing errors on geometric curve in design stage, meanwhile including success and failure process during the gradual change process in the forecast. Based on probabilistic fuzzy reliability point of view, the success or failure determination will be extended to fuzzy events. The geometric curve deign method will be also given when taking the impact of random engineering error into account. Related analysis formulae and the fuzzy criterion of success or failure of designing the curve process are established and derived. Through which, design and engineering process are integrated, the designer will be more reliably to predict the success or failure of the geometric curve design during the design stage. The processing error of lack of statistical data and the objectivity of the success or failure determination criterion will be easily solved. Economy cost and reliability design of geometrical curve design will be also considered.

Punching Force of Cold Die of Fuzzy Reliability Considering the Random Distribution of Material Properties

2011 ◽  
Vol 311-313 ◽  
pp. 1577-1582
Author(s):  
Zhi Su Zhao ◽  
Xing Hua Zhang
Keyword(s):  
Material Properties ◽  
Random Distribution ◽  
Point Of View ◽  
Design Stage ◽  
Gradual Change ◽  
Fuzzy Reliability ◽  
Reliability Design ◽  
Curve Design ◽  
Processing Error ◽  
The Impact

In order to be considered in the calculation of punching force of cold die random distribution of material properties, meanwhile including success and failure punching during the gradual change process in the calculation. Based on probabilistic fuzzy reliability point of view, the success or failure determination will be extended to fuzzy events. Based on fuzzy reliability, the punching force of cold die calculation method will be also given when taking the impact of random distribution of material properties into account. Related analysis formulae and the fuzzy criterion of success or failure of punching are established and derived. Through which, design and engineering process are integrated, the designer will be more reliably to predict the success or failure of the punching during the design stage. The processing error of lack of statistical data and the objectivity of the success or failure determination criterion will be easily solved. Economy cost and reliability design of geometrical curve design will be also considered.

scholarly journals Shape-changing tensegrity-membrane building skin

2020 ◽  
Vol 310 ◽  
pp. 00046
Author(s):  
Lenka Kabošová ◽  
Eva Kormaníková ◽  
Stanislav Kmeť ◽  
Dušan Katunský
Keyword(s):  
Design Method ◽  
Global Climate ◽  
Weather Conditions ◽  
Building Envelope ◽  
Digital Design ◽  
Design Stage ◽  
Design Tools ◽  
Ambient Conditions ◽  
Weather Extremes ◽  
The Impact

Building skins are persistently exposed to changes in the weather, including the cases of weather extremes, increasing in frequency due to global climate change. As a consequence of the advancements of digital design tools, the integration of the weather conditions into the design process is much smoother. The impact of the ambient conditions on buildings and their structures can be digitally analyzed as early as in the conceptual design stage. These new design tools stimulate original ideas for shape-changing building skins, actively reacting to the dynamic weather conditions. In the paper, a digital design method is introduced, leading towards the design of a building skin, able of the passive shape adaptation when subjected to the wind. The designed building skin consists of a tensegrity structure where the tensioned elements are substituted by a tensile membrane, creating a self-equilibrated building skin element. In the previous research, a small prototype of this wind-adaptive element was created. The computer simulations are employed to predict the adaptive behavior of a bigger, full-scale building skin element. The before-mentioned building envelope becomes an active player in its surrounding environment, passively reacting to the wind in real-time, thanks to the geometric and material properties. Due to the local shape changes caused by the wind force, the wind can be perceived unconventionally through the adaptive building structure.

scholarly journals Smart Cooperative Energy Supply Strategy to Increase Reliability in Residential Stand-Alone Photovoltaic Systems

2021 ◽  
Vol 11 (24) ◽  
pp. 11723
Author(s):  
Carlos Roldán-Blay ◽  
Carlos Roldán-Porta ◽  
Eduardo Quiles ◽  
Guillermo Escrivá-Escrivá
Keyword(s):  
Rural Areas ◽  
Energy Supply ◽  
Sequential Monte Carlo ◽  
Residential Buildings ◽  
Cost Effective ◽  
Point Of View ◽  
Design Stage ◽  
Interconnected System ◽  
Pv Systems ◽  
The Impact

In reliability studies of isolated energy supply systems for residential buildings, supply failures due to insufficient generation are generally analysed. Recent studies conclude that this kind of analysis makes it possible to optimally design the sizes of the elements of the generation system. However, in isolated communities or rural areas, it is common to find groups of dwellings in which micro-renewable sources, such as photovoltaic (PV) systems, can be installed. In this situation, the generation and storage of several houses can be considered as an interconnected system forming a cooperative microgrid (CoMG). This work analyses the benefits that sharing two autonomous installations can bring to each one, from the point of view of reliability. The method consists of the application of a random sequential Monte Carlo (SMC) simulation to the CoMG to evaluate the impact of a simple cooperative strategy on the reliability of the set. The study considers random failures in the generation systems. The results show that the reliability of the system increases when cooperation is allowed. Additionally, at the design stage, this allows more cost-effective solutions than single sizing with a similar level of reliability.

Study on Reliability Design Technology of Steam Turbine Blades

2005 ◽  
Author(s):  
Jin-Yuan Shi ◽  
Yu Yang ◽  
Qing Sun ◽  
Zhi-Cheng Deng
Keyword(s):  
Steam Turbine ◽  
Design Method ◽  
Turbine Blades ◽  
Scientific Basis ◽  
Design Stage ◽  
Dynamic Stresses ◽  
Reliability Design ◽  
Design Reliability ◽  
Endurance Strength ◽  
Steam Turbine Blades

A reliability design method of steam turbine blades is presented. The method considers static stresses, dynamic stresses, endurance strength, safety ratios, vibration frequencies and excition force frequencies of blades as random variables. The strength and vibration design reliability of turbine blades is determined with the help of probabilistic design method. Some reliability calculation formulas are given together with some practical examples. With the reliability design method for steam turbine blades as given in this paper, the design reliability of steam turbian blades can be determined in the design stage. The method may provide some scientific basis for reliability design of steam turbine blades.

scholarly journals Pathways Analyzer: Design of a Tool for the Synthetic Assembly of Escherichia Coli K-12 MG1655 Bacteria for Biofuel Production

2019 ◽  
Author(s):  
Laura Vasquez ◽  
Ricardo Alvarado ◽  
Allan Orozco
Keyword(s):  
Synthetic Biology ◽  
Metabolic Pathways ◽  
Point Of View ◽  
Biofuel Production ◽  
Design Stage ◽  
Computational Point ◽  
E Coli ◽  
Process Waste ◽  
K 12 ◽  
The Impact

ABSTRACTSummaryDue to the impact of environmental pollution, the importance of producing high quality biofuels and to leverage organic waste that normally would have no use has increased over time. Through synthetic biology, it is possible to improve existing organisms to process waste that is traditionally not used for biofuel production, such as whey.With the redesign of metabolic pathways, it is possible to create connections for the implementation of new organisms that carry out functions that are normally not present in nature.From a computational point of view, metabolic pathways, which can be found in data sources as KEGG, can be converted to a graph data structure. These transformations enable the use of well-known algorithms, which enables the optimization of the analyses required to achieve the assembly of new organisms.The present work aims to design a tool for the transformation of metabolic pathways and the development of path finding algorithms that establish relevant links between compounds that are essential to the biofuel production process.As a result, a catalog of biobricks is created from the analysis of a subset of paths which can be used in the design stage of the synthetic assembly of the E. coli bacteria. The assembly’s structure and functions are characterized according to the pieces used.Finally, new constructions are visualized with the goal of demonstrating and supporting the analysis processes, thus assisting people that work in the field of Synthetic Biology.AvailabilityPathways Analyzer is accessible at: https://gitlab.com/lvasquezcr/pathways-analyzer/

scholarly journals The challenge to determine a company’s process maturity: a case study from the financial services industry

2017 ◽  
Vol 25 (2) ◽  
pp. 85-91
Author(s):  
Alisa Keller ◽  
Jürgen Moormann
Keyword(s):  
Financial Services ◽  
Mixed Methods Research ◽  
Business Processes ◽  
Design Method ◽  
Point Of View ◽  
Current Status ◽  
Theoretical Point ◽  
Process Maturity ◽  
Services Sector ◽  
The Impact

Purpose. Conducting projects to improve a company’s business processes is of utmost importance in all industries and countries. Many companies have installed specific organizational units to develop guidelines for process design, to document and maintain of these processes, and to further increase the processes’ efficiency. Although these enterprises continually work on improving their processes, they often struggle to answer the question on the current status of the maturity of their processes. Therefore, the purpose of this work is to characterize the methodology, applicability, pitfalls and benefits of analyzing the maturity of processes. Design/Method/Approach. This work is based on mixed-methods research recently conducted in a medium-sized German bank. Findings. The paper defined the benefits of measuring the level of maturity of the company’s processes clearly. This work identified the substantial theoretical drawbacks, such as, for example, the lack of considering of process innovation in the extant models of process maturity. Limitations. Naturally, a research limitation is the analysis of a specific company in the financial services sector. Theoretical implications. From a theoretical point of view it is critical to choose the appropriate model out of a variety of available process maturity models. In fact, the selection of the model influences the data, the subsequent interpretation of these data, and the conclusions to be drawn for the company. Originality/Value. The paper is novel as it presents–based on empirical data–the measurement of process maturity including the derivation of implications from both an academic and a practical perspective. In addition, the impact of process maturity on perceived process performance could be shown.   Paper type – empirical.

Integrated Product and Process Design for a Flapping Wing Drive Mechanism

2009 ◽  
Vol 131 (6) ◽  
Author(s):  
Wojciech Bejgerowski ◽  
Arvind Ananthanarayanan ◽  
Dominik Mueller ◽  
Satyandra K. Gupta
Keyword(s):  
Power Transmission ◽  
Transmission Efficiency ◽  
Flapping Wing ◽  
Point Of View ◽  
Design Stage ◽  
Molding Process ◽  
Drive Mechanism ◽  
Battery Capacity ◽  
Product And Process ◽  
The Impact

Successful realization of a flapping wing micro-air vehicle (MAV) requires development of a light weight drive mechanism that can convert the continuous rotary motion of the motor into oscillatory flapping motion of the wings. The drive mechanism should have low weight to maximize the payload and battery capacity. It should also have high power transmission efficiency to maximize the operational range and to minimize weight of the motor. In order to make flapping wing MAVs attractive in search, rescue, and recovery efforts, they should be disposable from the cost point of view. Injection molded compliant drive mechanisms are an attractive design option because of manufacturing scalability and reduction in the number of parts. However, realizing compliant drive mechanism using injection molding requires use of multipiece multigate molds. Molding process constraints need to be considered during the design stage to successfully realize the drive mechanism. This paper describes an approach for determining the drive mechanism shape and size that meets both the design and molding requirements. The novel aspects of this work include (1) minimizing the number of mold pieces and (2) the use of sacrificial shape elements to reduce the impact of the weld-lines on the structural performance. The design generated by the approach described in this paper was utilized to realize an operational flapping wing MAV.

The Fuzzy Reliability Robust Design Based on MATLAB

2012 ◽  
Vol 479-481 ◽  
pp. 995-1003
Author(s):  
Guang Hui Li ◽  
Tao Tao Liu ◽  
Li Hua Zhang
Keyword(s):  
Robust Design ◽  
Optimization Design ◽  
Design Method ◽  
Minimum Weight ◽  
Fuzzy Optimization ◽  
Fuzzy Reliability ◽  
Reliability Design ◽  
Minimum Sensitivity ◽  
Robust Design Method ◽  
Worm Drive

In order to rationalize the design of the worm-drive, the fuzzy reliability design method and robust design method were fully applied to develop the new model for fuzzy reliability optimization design of worm-drive with the minimum weight, minimum sliding-velocity, and minimum sensitivity as the objective function. The fuzzy optimization design result of the worm-drive was obtained by compiling MATLAB procedure. Compared with traditional design methods，the center distance was reduced by 33.3％, the sliding speed is reduced by 10.6%.The life of the worm-drive was raised by11.5％,and the wear quantity of the worm-drive was decreased by 0.1％after 100 hours' running.

The Geosciences Applied to Lunar Exploration

1962 ◽  
Vol 14 ◽  
pp. 169-257 ◽  
Author(s):  
J. Green
Keyword(s):  
Lunar Surface ◽  
Probable Mechanism ◽  
Point Of View ◽  
Lunar Exploration ◽  
Geological Model ◽  
Apply Geophysics ◽  
Surface Features ◽  
The Impact

The term geo-sciences has been used here to include the disciplines geology, geophysics and geochemistry. However, in order to apply geophysics and geochemistry effectively one must begin with a geological model. Therefore, the science of geology should be used as the basis for lunar exploration. From an astronomical point of view, a lunar terrain heavily impacted with meteors appears the more reasonable; although from a geological standpoint, volcanism seems the more probable mechanism. A surface liberally marked with volcanic features has been advocated by such geologists as Bülow, Dana, Suess, von Wolff, Shaler, Spurr, and Kuno. In this paper, both the impact and volcanic hypotheses are considered in the application of the geo-sciences to manned lunar exploration. However, more emphasis is placed on the volcanic, or more correctly the defluidization, hypothesis to account for lunar surface features.

МАРКЕТИНГОВІ АСПЕКТИ ФУНКЦІОНУВАННЯ ЛІТЕРАТУРНИХ КОНКУРСІВ ТА ПРЕМІЙ

2020 ◽  
pp. 90
Author(s):  
O. Bondar
Keyword(s):  
Publishing House ◽  
Target Audience ◽  
Point Of View ◽  
Information Support ◽  
Literary Field ◽  
Non Profit ◽  
Functional Aspects ◽  
The Media ◽  
Literary Prizes ◽  
The Impact

<p><em>In this study, I have collected and summarized the functional aspects of a literary prize, contest, and rating, which indicate their affiliation with the marketing complex of the publishing house for the first time. For this purpose, I have analyzed and summarized the common concepts of the functioning of literary prizes and contests as advertising tools for publishing activity. Because the previous studies are only focused on the fact of the impact of the prize on the promotion of editions but do not explain it, these aspects have been considered and introduced by me from the book production’s point of view. I investigated that the prizes and the contests in the literary field are effective marketing tools, which meet many publisher’s needs at the same time and can be considered a non-profit form of capital. I have reviewed the works of other authors, who accept that the economic success of the book is rising if the author is a winner of the literary prize or contest. I have found out that the book prize activates the demand for the book, and the literary contest is a tool to track the reader’s reaction to a future publication. In this way, literary prizes and contests can be considered as a way of conducting a marketing dialogue with the target audience. I have focused on the information support of literary national and international prizes and contests by the media, which attracts attention to the book and forms the reader’s interest. The literary prizes and contests are also considered as a way of exploring trends and their changes, familiarization the popular genres among the target audience and fixation the current choice of modern readers. Literary prizes and contests motivate the authors to improve their literary excellence, are the source of new authors and works, and assist in increasing sales of books. However, further research is recommended.</em></p><strong><em>Key words:</em></strong><em> book prize, book rating, literary contest, literary prize, functions of the literary prizes.</em>

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