Results 31 to 40 of about 940,882 (376)
Hardness Amplification of Optimization Problems [PDF]
, 2019 In this paper, we prove a general hardness amplification scheme for optimization problems based on the technique of direct products. We say that an optimization problem ?
Goldenberg, Elazar, Karthik C. S.,
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Automated soil hardness testing machine [PDF]
, 2007 This paper describes the design and performance of a mechatronic system for controlling a standard drop-hammer mechanism that is commonly used in performing outdoor soil or ground hardness tests. A low-cost microcontroller is used to control a hydraulic
Cubero, Samuel N. +1 more
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Effect of Oil – Corrosion on Tensile and Fatigue S-N Curve Properties of AA6061-T6 [PDF]
Engineering and Technology Journal, 2021 The present study described the effect of shot peening on mechanical properties and rotating corrosion –fatigue behavior (strength and life) of AA6061-T6. Ultimate tensile strength (UTS) and yield stress (YS) were reduced by 4.6% and 1.24% when immersing
Hussain J.M. Al-Alkawi +2 more
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Analysis of indentation size effect in copper and its alloys [PDF]
, 2013 For describing the indentation size effect (ISE), numerous models, which relate the load or hardness to the indent dimensions, have been proposed. Unfortunately, it is still difficult to associate the different parameters involved in such relationships ...
CHICOT, Didier +6 more
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Comparison of the effects of MoSi2 and CrSi2 on sintering and properties of titanium diboride (TiB2) [PDF]
Processing and Application of Ceramics, 2023 Titanium diboride (TiB2) is a typical material classified as structural ceramics. However, sintering of TiB2 ceramics is difficult mainly because of a significant fraction of covalent bonds in the structure. In order to obtain dense TiB2 ceramics various
Gubernat Agnieszka +6 more
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Indentation Hardness Measurements at Macro-, Micro-, and Nanoscale: A Critical Overview
Tribology letter, 2017 The Brinell, Vickers, Meyer, Rockwell, Shore, IHRD, Knoop, Buchholz, and nanoindentation methods used to measure the indentation hardness of materials at different scales are compared, and main issues and misconceptions in the understanding of these ...
E. Broitman
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Shape-independent hardness estimation using deep learning and a GelSight tactile sensor [PDF]
IEEE International Conference on Robotics and Automation, 2017 Hardness is among the most important attributes of an object that humans learn about through touch. However, approaches for robots to estimate hardness are limited, due to the lack of information provided by current tactile sensors.
Wenzhen Yuan +4 more
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Proof verification and hardness of approximation problems
Proceedings., 33rd Annual Symposium on Foundations of Computer Science, 1992 The class PCP(f(n),g(n)) consists of all languages L for which there exists a polynomial-time probabilistic oracle machine that used O(f(n)) random bits, queries O(g(n)) bits of its oracle and behaves as follows: If x in L then there exists an oracle y ...
Sanjeev Arora +4 more
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Enhanced Hardness in High‐Entropy Carbides through Atomic Randomness
Advanced Theory and Simulations, 2020 High‐entropy carbides (HECs) are of great interest as they are promising candidates for ultra‐high‐temperature and high‐hardness applications. To discover carbides with enhanced yield strength and hardness, mechanism‐based design approaches are needed ...
Yichen Wang +5 more
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Hardness of approximate nearest neighbor search [PDF]
Symposium on the Theory of Computing, 2018 We prove conditional near-quadratic running time lower bounds for approximate Bichromatic Closest Pair with Euclidean, Manhattan, Hamming, or edit distance.
A. Rubinstein
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