On the Dexterity of Robotic Manipulators—Service Angle

1985 ◽  
Vol 107 (2) ◽  
pp. 262-270 ◽  
Author(s):  
D. C. H. Yang ◽  
Z. C. Lai
Keyword(s):  
Theoretical Study ◽  
Robotic Manipulators ◽  
Basic Properties ◽  
Free Service ◽  
The Relationship

This paper presents a theoretical study on the dexterity problem of 6R manipulators. Particularly, it deals with the manipulator’s service angle around a reachable point in space. The first part conceptualizes the ideas of service region, free service region and polarities of robots, and shows that the entire service angle can be categorized into a number of free service regions. The remainder of the paper deals with the investigation of basic properties of free service regions. The relationship between free service regions and service angle is subsequently formulated into a set of theorems and criteria. Specific examples are given for illustration.

scholarly journals On an invariant distance induced by the Szegő Kernel

2021 ◽  
Vol 7 (3) ◽  
Author(s):  
Steven G. Krantz ◽  
Paweł M. Wójcicki
Keyword(s):  
Szegö Kernel ◽  
Basic Properties ◽  
Szegő Kernel ◽  
Invariant Distance ◽  
Szego Kernel ◽  
The Relationship

AbstractIn this paper we introduce a new distance by means of the so-called Szegő kernel and examine some basic properties and its relationship with the so-called Skwarczyński distance. We also examine the relationship between this distance, and the so-called Bergman distance and Szegő distance.

Theoretical Study on the Relationship Between Crystal Chemistry and Properties of Quaternary Y-Si-O-N Oxynitrides

2016 ◽  
Vol 99 (7) ◽  
pp. 2442-2450 ◽  
Author(s):  
Luchao Sun ◽  
Bin Liu ◽  
Jiemin Wang ◽  
Zhen Li ◽  
Jingyang Wang
Keyword(s):  
Crystal Chemistry ◽  
Theoretical Study ◽  
The Relationship

scholarly journals Elephant trunks form joints to squeeze together small objects

2018 ◽  
Vol 15 (147) ◽  
pp. 20180377
Author(s):  
Jianing Wu ◽  
Yichao Zhao ◽  
Yunshu Zhang ◽  
David Shumate ◽  
Stephanie Braccini Slade ◽  
...  
Keyword(s):  
Granular Materials ◽  
Theoretical Study ◽  
Robotic Manipulators ◽  
Force Sensor ◽  
The Self ◽  
Applied Force ◽  
African Elephants ◽  
Food Items ◽  
Unique Method ◽  
Push Down

Wild African elephants are voracious eaters, consuming 180 g of food per minute. One of their methods for eating at this speed is to sweep food into a pile and then pick it up. In this combined experimental and theoretical study, we elucidate the elephant’s unique method of picking up a pile of food by compressing it with its trunk. To grab the smallest food items, the elephant forms a joint in its trunk, creating a pillar up to 11 cm tall that it uses to push down on food. Using a force sensor, we show the elephant applies greater force to smaller food pieces, in a manner that is required to solidify the particles into a lump solid, as calculated by Weibullian statistics. Elephants increase the height of the pillar with the force required, achieving up to 28% of the applied force using the self-weight of the pillar alone. This work shows that elephants are capable of modulating the force they apply to granular materials, taking advantage of their transition from fluid to solid. In the future, heavy robotic manipulators may also form joints to compress and lift objects together.

scholarly journals On t-Neighbourhoods in Trigonometric Topological Spaces

2021 ◽  
Vol 12 (1S) ◽  
pp. 655-658
Author(s):  
S. Malathi, Et. al.
Keyword(s):  
Necessary Condition ◽  
Topological Spaces ◽  
Basic Properties ◽  
New Type ◽  
The Relationship

In this paper we introduce a new type of neighbourhoods, namely, t-neighbourhoods in trigonometric topological spaces and study their basic properties. Also, we discuss the relationship between neighbourhoods and t-neighbourhoods. Further, we give the necessary condition for t-neighbourhoods in trigonometric topological spaces.  .

scholarly journals Quasi-posinormal operators

2010 ◽  
Vol 7 (3) ◽  
pp. 1282-1287
Author(s):  
Baghdad Science Journal
Keyword(s):  
Hilbert Space ◽  
Normal Operator ◽  
Basic Properties ◽  
Hyponormal Operators ◽  
The Relationship

In this paper, we introduce a class of operators on a Hilbert space namely quasi-posinormal operators that contain properly the classes of normal operator, hyponormal operators, M–hyponormal operators, dominant operators and posinormal operators . We study some basic properties of these operators .Also we are looking at the relationship between invertibility operator and quasi-posinormal operator .

New perspective on the laser initiation for metal tetrazine complexes: a theoretical study

2021 ◽  
Author(s):  
Junqing Yang ◽  
Gu-Dan Zhang ◽  
Jianguo Zhang ◽  
Dong Chen ◽  
Qi Zhang
Keyword(s):  
Charge Transfer ◽  
Theoretical Study ◽  
Laser Initiation ◽  
New Perspective ◽  
The Relationship

In order to understand the relationship between the laser initiation and the charge transfer of the metal tetrazine complexes (MTCs), several sets of MTCs with different metals and ligands were...

Study on the Relationship between Supervisors' Remuneration in Listed Companies and Tobacco Control Measures

2021 ◽  
Vol 7 (6) ◽  
pp. 5074-5086
Author(s):  
Miao Wang ◽  
Pengfei Li
Keyword(s):  
Theoretical Study ◽  
Company Law ◽  
Theory And Practice ◽  
Control Measures ◽  
Clear Understanding ◽  
Corporation Governance ◽  
Legal Principle ◽  
Self Consistent ◽  
The Difference ◽  
The Relationship

Objectives: At present, the theoretical study on supervisors' remuneration under the Company Law is still too principled, and many "chaos" occur in the remuneration practices for supervisors. First, the lack of clear understanding of the incentive function and institutional specificities of supervisors' remuneration results in many problems in the application of supervisors' remuneration in practice, as well as the ignoration of the Board of Supervisors in corporation governance. Second, rather than reaching the intended effect, the legislative approach of authorized "blank" intentionally adopted under the Company Law leaves an inducement for the ineffective supervision of supervisors in practice. Third, there is not only a lack of theoretically self-consistent discussion on the special problems of concurrent supervisors and employee supervisors' remuneration, but also a divorce of the institutional structure and application from good expectations. If the research background of the problem is placed in "tobacco regulatory science", it will be found that there is no inevitable connection between supervisors' compliance expectations and remuneration, but mainly depends on the provisions of legislation. Going back and forth between theory and practice of supervisors' remuneration, this paper combs and interprets the issue of supervisors' remuneration from the perspective of the legislative provisions and theoretical study under the Company Law, and analyzes the difference between the reality and the necessity of the Company Law with respect to the issue of supervisors' remuneration in the light of the legal principle of the Company Law, with the view to improvement of the rules of the Company Law.

Contributions of Information Science in the Data Science Era

2021 ◽  
pp. 45-64
Author(s):  
Rogério Aparecido Sá Ramalho ◽  
Ricardo César Gonçalves Sant'Ana ◽  
Francisco Carlos Paletta
Keyword(s):  
Life Cycle ◽  
Data Science ◽  
Information Science ◽  
Theoretical Study ◽  
Digital Technologies ◽  
Data Access ◽  
New Challenges ◽  
Object Of Study ◽  
Access To Data ◽  
The Relationship

The acceleration of the development of digital technologies and the increase of the capillarity of their effects present new challenges to the praxis related to the treatment and informational flows and those that are object of study of information science. This chapter is based on a theoretical study that analyzes information science contributions in the data science era, analyzing from the Cynefin Framework to the new contemporary informational demands generated by the increasing predominance of data access and use. In order to establish the relationship between the skills expected from the information science professional and its relationship with access to data, the Cynefin Framework was used as a basis to establish a perspective of analyzing the skills involved in each of the phases of the life cycle of the data.

Theoretical study on the relationship between the position of the substituent and the ESIPT fluorescence characteristic of HPIP

2020 ◽  
Vol 29 (3) ◽  
pp. 038201 ◽  
Author(s):  
Xin Zhang ◽  
Jian-Hui Han ◽  
You Li ◽  
Chao-Fan Sun ◽  
Xing Su ◽  
...  
Keyword(s):  
Theoretical Study ◽  
Fluorescence Characteristic ◽  
The Relationship
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