Mobility of Stephenson Six-Bar Chains: Part I — Circuit and Circuit Defect

2004 ◽  
Author(s):  
Xiao-Ning Guo ◽  
Jin-Kui Chu
Keyword(s):  
Theoretical Basis ◽  
Difficult Problem ◽  
Computer Aided ◽  
Scheme Selection ◽  
Selection Of ◽  
Linkage Synthesis

Circuit defect is a fundamental and difficult problem in the process of linkage synthesis. In this paper, a Stephenson six-bar chain can be regarded as combination of a four-bar chain and a dyad. Base on the distance of two common joints shared by the four-bar chain and the dyad, the principle is elucidated and the model is established for circuit identification of Stephenson six-bar chains. The criteria and procedures to automatically identify the circuit and circuit defect of Stephenson six-bar chains are developed. The results provide theoretical basis and technical method for computer aided dimensional scheme selection of Stephenson six-bar mechanisms synthesis. In addition, the model for circuit identification can be directly used to solve the motion order defect that is often encountered in Stephenson six-bar mechanisms synthesis.

scholarly journals The therapeutic mechanism of epilepsy seizures in different target areas: Research on a theoretical model

2021 ◽  
Vol 29 ◽  
pp. 455-461
Author(s):  
Bing Hu ◽  
Zhizhi Wang ◽  
Minbo Xu ◽  
Luyao Zhu ◽  
Dingjiang Wang
Keyword(s):  
Pyramidal Neurons ◽  
Control Mechanism ◽  
Difficult Problem ◽  
Calculation Model ◽  
Thalamic Reticular Nucleus ◽  
Reticular Nucleus ◽  
Theoretical Support ◽  
Therapeutic Mechanism ◽  
Optimal Target ◽  
Selection Of

BACKGROUND: The selection of optimal target areas in the surgical treatment of epilepsy is always a difficult problem in medicine. OBJECTIVE: We employed a theoretical calculation model to explore the control mechanism of seizures by an external voltage stimulus acting in different nerve nuclei. METHODS: Theoretical analysis and numerical simulation were combined. RESULTS: The globus pallidus, excitatory pyramidal neurons, striatal D1 neurons, thalamic reticular nucleus and specific relay nuclei were selected, we analyzed that the electrical stimulation has different effects in these target areas. CONCLUSIONS: The data selected were reasonable in study, the results may give a theoretical support for similar studies in clinical.

Computer-aided selection of a polymer matrix for polyaniline conductive blends

1998 ◽  
Vol 9 (9) ◽  
pp. 563-568 ◽  
Author(s):  
D. Alperstein ◽  
M. Narkis ◽  
M. Zilberman ◽  
A. Siegmann
Keyword(s):  
Polymer Matrix ◽  
Computer Aided ◽  
Selection Of

Enhancing CAD For The Forensic Engineer

1984 ◽  
Vol 2 (1) ◽  
Author(s):  
Lindley Manning
Keyword(s):  
Computer Graphics ◽  
Photographic Evidence ◽  
Computer Aided ◽  
Engineering Drawings ◽  
Forensic Engineering ◽  
Selection Of

The purpose of this paper is to inform the Academy of an application of computer graphics that has been successful in the court room and which has the potential for extension to many related needs of the forensic engineer. An additional purpose is to examine the possibility of cooperation within the Academy to make a broad database and selection of equipment available to the members. Attentive engineers of today are well aware of the growing use and impact of computer-aided drafting, design and analysis in a wide variety of industries. In our field, we are aware of large analysis programs which have been used with success in court, for example the CRASH series. The authors forensic engineering partnership has developed ways to utilize the more widely available drafting systems to inexpensively fill the gap between photographic evidence and full engineering drawings. We have also found that CAD drawings appear to have more impact in court than hand done drawings. In some cases

Translation Technology

2015 ◽  
Author(s):  
Lynne Bowker ◽  
Gloria Corpas Pastor
Keyword(s):  
Professional Competence ◽  
High Quality ◽  
Translation Tools ◽  
Use Of Technology ◽  
Computer Aided ◽  
Increase Productivity ◽  
Selection Of

In today’s market, the use of technology by translators is no longer a luxury but a necessity if they are to meet rising market demands for the quick delivery of high-quality texts in many languages. This chapter describes a selection of computer-aided translation tools, resources, and applications, most commonly employed by translators to help them increase productivity while maintaining high quality in their work. This chapter also considers some of the ways in which translation technology has influenced the practice and the product of translation, as well as translators’ professional competence and their preferences with regard to tools and resources.

scholarly journals Design Method of Circular Weft-Knitted Jacquard Fabric Based on Jacquard Module

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Peixiao Zheng ◽  
Gaoming Jiang ◽  
Honglian Cong
Keyword(s):  
Mathematical Modeling ◽  
Computer Aided Design ◽  
Theoretical Basis ◽  
Design Method ◽  
Two Dimensional ◽  
Design Procedures ◽  
Rapid Design ◽  
Computer Aided ◽  
Aided Design

Abstract Recently, there is an increasing interest in design of circular weft jacquard because of the pursuit of fashion and comfort. Aiming at the complexity of the computer-aided design method of the existing circular weft-knitted jacquard fabrics, which is not conducive to the rapid design and intelligible for designers, a design method was proposed to transform pattern notation into knitting diagram efficiently, which was based on knitting rules and its creation as a set of jacquard modules. Knitting characteristics of jacquard fabrics were studied as a precondition. On this basis, the design procedures of jacquard modules were analyzed and illustrated by taking tricolor bird's eye backing jacquard as an example. Jacquard modules with various jacquard effects were designed and stored in a jacquard module database. To mathematically describe pattern notation, knitting diagram, and jacquard module, two-dimensional matrixes were established by the method of mathematical modeling, and a corresponding algorithm for the transformation of the pattern to knitting information according to the knitting rules of jacquard modules, which can be applied to ordinary jacquard fabrics was summarized. The project of tricolor circular weft-knitted jacquard with bird's eye in the reverse and four-color air-layer jacquard were taken for instance to verify the models and algorithm. The results obtained show that the approach can efficiently and conveniently realize the designation and machine-knitting of weft-knitted jacquard fabric, which provide a theoretical basis and notation of modeling for the computer-aided design of circular weft-knitted jacquard fabrics.

Automated Design of Optimum Belt Drives

1991 ◽  
Author(s):  
Dipendra K. Sinha ◽  
Michael T. McDonald
Keyword(s):  
Computer Aided Design ◽  
Database Management ◽  
Relevant Information ◽  
Automated Design ◽  
Drive System ◽  
Management Systems ◽  
Belt Drives ◽  
Computer Aided ◽  
Aided Design ◽  
Selection Of

Abstract The paper describes a belt design package which works from within a commercial Computer Aided Design and Drafting package (AutoCAD) environment and utilizes FORTRAN programs for design and selection of lowest weight components for the drive system. The components used in the process are available as stock items in U.S.A. The relevant information on these products is stored in commercial database management systems such as EXCEL and LOTUS 1-2-3. Output from the package consists of scaled drawing and tabular specifications.

Nationalism and Ethnic Demands: Some Speculations on a Congenial Note

1977 ◽  
Vol 10 (2) ◽  
pp. 375-389
Author(s):  
Robert Drummond
Keyword(s):  
Ethnic Group ◽  
Theoretical Basis ◽  
Political System ◽  
Historical Perspective ◽  
A Priori ◽  
The Political ◽  
Type Model ◽  
The Subject ◽  
Empirical Tests ◽  
Selection Of

In an interesting and insightful article published in 1969, James Lightbody has attempted an improvement of the theoretical basis for the study of nationalism among political scientists. He suggests that the historical perspective which has characterized most previous treatments of the subject should be abandoned, and that its replacement should be a model which perceives nationalism as the result of ethnic group demands upon a functioning political system. Lightbody argues that the adoption of this sort of model would permit political scientists to determine the characteristics which distinguish “nationalist” movements from similarly configured “non-nationalist” groups. Further-more one could look beyond the “collective enumeration of the various demands that have been made by various nation-seeking groups and their self-appointed spokesmen” which serve as the focus of concern for those who see nationalism as ideology. One could examine ethnic group demands without rejecting them a priori as unnaturally disruptive, and one could make comparisons between majority and minority expressions of nationalist views. The model is an “ideal-type” model, bordering on formalism, since it abstracts the demands of ethnic groups from other similar group demands made on the political system, but it has been constructed with a view to the selection of data which could provide empirical tests of its usefulness.

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