Results 71 to 80 of about 743,734 (173)

Nash images of closed balls and applications

open access: yes, 2023
We study Nash images of closed balls and (several ...
openaire   +1 more source

Fluid Loss Isolation Valve Design and Sealing Performance Study

open access: yesShiyou jixie, 2016
In the operation of multistage fracturing,well completion,production and workover,leakage is often encountered and leads to formation damage due to the failure of tool.To address the issue,the high-pressure fluid-loss isolation valve has been developed ...
Chen Shengshan   +6 more
doaj  

On sup- and inf-attaining functionals

open access: yesOpen Mathematics
Reflexivity is characterized by the weak-compactness of the unit ball. The weak-compactness of bounded, closed, and convex sets is characterized through sup-attaining functionals in view of the famous James’ theorem.
García-Pacheco Francisco Javier
doaj   +1 more source

薄壁深沟球轴承负荷分布及寿命研究

open access: yesJixie chuandong, 2012
The rigid ferrule hypothesis is usually used in the research on load distribution of ball bearings,but it has a relatively big error for thin-wall bearings which have flexible supported ferrules.The 3D finite element analytical model for thin-wall deep ...
倪艳光, 刘玉, 焦育洁, 梁波
doaj  

Some Fixed Point Results for Multivalued Mappings in b−Multiplicative and b−Metric Space

open access: yesInternational Journal of Analysis and Applications, 2020
The main outcome of this paper is to introduce the notion of Hausdorff b-multiplicative metric space and to present some fixed point results for multivalued mappings in this space.
Mazhar Mehmood   +2 more
doaj  

Open and closed penalty kick strategies in intermediate soccer player

open access: yesEuropean Journal of Human Movement, 2010
This study investigates the efficacy of intermediate penalty kickers by comparing the effect of applying an automated WiFi (Wireless Fidelity)  system on the field of play to simulate a strategy that takes account of goalkeeper action (open) with another
J. M. Castillo   +4 more
doaj  

Mechanism research on eliminating voids in bearing steel ball by floating-pressure method (FPM)

open access: yesMetalurgija, 2018
To eliminate internal void and improve the mechanical properties of steel balls formed by skew rolling, the floatingpressure method (FPM) using high-pressure gas to compact void is applied in this paper.
D. Y. Tian, X. D. Shu, C. Xu
doaj  

Novel results for separate families of fuzzy-dominated mappings satisfying advanced locally contractions in b-multiplicative metric spaces with applications

open access: yesJournal of Inequalities and Applications
The objective of this research is to present new fixed point theorems for two separate families of fuzzy-dominated mappings. These mappings must satisfy a unique locally contraction in a complete b-multiplicative metric space.
Tahair Rasham   +4 more
doaj   +1 more source

Effect of different impression materials and techniques on the dimensional accuracy of implant definitive casts

open access: yesDental Research Journal, 2015
Background: Different factors such as impression techniques and materials can affect the passive fit between the superstructure and implant. The aim of this study was to determine the effect of different impression materials and techniques on the ...
Behnaz Ebadian   +3 more
doaj  

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