Results 31 to 40 of about 3,502,209 (342)

Multiway Storage Modification Machines [PDF]

arXiv, 2021
We present a parallel version of Sch\"onhage's Storage Modification Machine, the Multiway Storage Modification Machine (MWSMM). Like the alternative Association Storage Modification Machine of Tromp and van Emde Boas, MWSMMs recognize in polynomial time what Turing Machines recognize in polynomial space.
arxiv  

Kinematic characteristics of mass finishing process with the parallel spindle: Velocity measurement and analysis of the media

Advances in Mechanical Engineering, 2017
References for theory analysis, quality prediction, and automatic control can be provided by testing the displacement variation of the media in mass finishing process with the parallel spindle using CCD laser displacement sensor, calculating the whole ...
Xiuhong Li, Fengfeng Wu, Wenhui Li, Shengqiang Yang, Yunan Chen   +4 more
doaj   +1 more source

Investigation of Surface Integrity Induced by Ultra-Precision Grinding and Scratching of Glassy Carbon

Micromachines, 2023
Glassy carbon provides material characteristics that make it a promising candidate for use as a mould material in precision glass moulding. However, to effectively utilize glassy carbon, a thorough investigation into the machining of high-precision ...
Kirk Jahnel, Robert Michels, Dennis Patrick Wilhelm, Tim Grunwald, Thomas Bergs   +4 more
doaj   +1 more source

Gradient droplet distribution promotes spontaneous formation of frost-free zone

Communications Materials, 2022
Preventing the condensation of water is key for anti-icing applications. Here, a macro-ridged surface is found to prevent frost formation either side of each ridge, attributed to a change in water vapor distribution preventing ice bridge formation.
Chenguang Lu, Cong Liu, Zichao Yuan, Haiyang Zhan, Danyang Zhao, Lei Zhao, Shile Feng, Yahua Liu   +7 more
doaj   +1 more source

Compression properties of 316L stainless steel E-BCT lattice structure based on SLM process

Journal of Aeronautical Materials
The elliptic section body-centered tetragonal（E-BCT）lattice structure of 316L stainless steel fabricated based on selective laser melting（SLM），represents an enhanced lattice structure with improved compressive performance.
ZHU Fengli, XU Mingsan, WEI Tieping, YE Jianhua, PAN Wenhan, YANG Linyi   +5 more
doaj   +1 more source

Study on ultrasonic regulation of the welding performance and defects of 7A52 aluminum alloy plate

AIP Advances, 2022
The welding performance and defects of thick aluminum alloy plates with medium and high strength are always a hot research topic. In this study, ultrasonic technology was used to regulate the properties and defects of welded joints of a 7A52 aluminum ...
Peng Yin, Chunguang Xu, Qinxue Pan, Wenjun Zhang, Xiaowei Jiang   +4 more
doaj   +1 more source

Aqueous lubrication and surface microstructures of engineering polymer materials (PEEK and PI) when sliding against Si3N4

Friction, 2017
Polyether-ether-ketone (PEEK) and polyimide (PI) are two kinds of engineering polymer materials widely used as roller bearing cages and rings under extreme environment because of their noise reduction and corrosion resistance properties.
Anying Wang, Shuai Yan, Bin Lin, Xiaofeng Zhang, Xiaoxue Zhou   +4 more
doaj   +1 more source

Parallelization of Machine Learning Algorithms Respectively on Single Machine and Spark [PDF]

arXiv, 2022
With the rapid development of big data technologies, how to dig out useful information from massive data becomes an essential problem. However, using machine learning algorithms to analyze large data may be time-consuming and inefficient on the traditional single machine. To solve these problems, this paper has made some research on the parallelization
arxiv  

A histidine‐rich extension of the mitochondrial F0 subunit ATP6 from the ice worm Mesenchytraeus solifugus increases ATP synthase activity in bacteria

FEBS Letters, EarlyView.
The glacier ice worm Mesenchytraeus solifugus survives year‐round at 0 °C. Its ATP6 subunit, which forms a regulatory component of the proton pore in mitochondrial ATP synthase, has a carboxy‐terminal extension not found in any other organism examined to date. Here, we show that fusion of this extension to the homologous AtpB protein in E. coli results
Truman Dunkley, Daniel H. Shain, Eric A. Klein   +2 more
wiley   +1 more source

The Effect of Plasma–Electrolytic Nitrocarburizing of a Medium Carbon Steel Surface on Friction and Wear in Pair with Tin–Lead Bronze

Metals, 2023
The possibility of increasing the durability of steel pins working against bronze bushings through plasma–electrolytic nitrocarburizing of the surface of medium carbon steel is shown.
Anatoly Borisov, Tatiana Mukhacheva, Sergei Kusmanov, Igor Suminov, Pavel Podrabinnik, Yaroslav Meleshkin, Sergey Grigoriev   +6 more
doaj   +1 more source