Results 21 to 30 of about 14,166 (227)
Reducing critical effects of torsional vibrations induced by PDC bits during rock destruction
Известия высших учебных заведений: Геология и разведка, 2022 Introduction. Torsional vibrations caused by drilling using a polycrystalline diamond compact (PDC) bit are analysed using wellbore data obtained under various drilling modes. The drilling caused by torsional vibrations are analysed.
B. A. Ovezov +4 more
doaj +1 more source
, 2008 We present a way for entanglement purification based on two parametric down-conversion (PDC) sources with cross-Kerr nonlinearities. It is comprised of two processes.
Fu-Guo Deng +3 more
core +1 more source
Base station transceiver design in a digital wireless local loop system [PDF]
, 1998 During the past ten years the mobile radio communications industry has significantly grown. The miniaturization technologies have allowed smaller and smaller portable terminal radio equipment.
Figueiredo, J. +6 more
core +1 more source
Proposal for optical parity state re-encoder
, 2007 We propose a re-encoder to generate a refreshed parity encoded state from an existing parity encoded state. This is the simplest case of the scheme by Gilchrist et al. (Phys. Rev. A 75, 052328).
A.J.F. Hayes +8 more
core +1 more source
Development of PDC Bits for Downhole Motors [PDF]
, 1995 To develop polycrystalline hamond compact (PDC) bits of the full-face type which can be applied to downhole motor drilling, drilling tests for granite and two types of andesite were conducted using bits with 98.43 and 142.88 mm diameters. The bits successfully drilled these types of rock at rotary speeds from 300 to 400 rpm.
Karasawa, H., Ohno, T.
openaire +2 more sources
Fluid Forces Control Structural Remodeling of Blind‐Ended Lymphatic Microvessels
Advanced Healthcare Materials, EarlyView.Using innovative microfluidic biofabrication with fluid mechanical insights, we recapitulated the blind‐ended microanatomy and physiological drainage properties of capillary lymphatics. Our results reveal the interrelationship between intra‐ and extraluminal regions of lymphatic vessels due to flow‐induced sprouting and morphological changes that ...
Jacob C. Holter +5 more
wiley +1 more source
Advanced Healthcare Materials, EarlyView.A superhydrophobic 3D cell culture platform enables rapid and consistent formation of heterotypic tumor–stroma clusters, and reveals how physiological shear conditions influence metastatic signaling. Mechanical stimulation of cancer‐associated fibroblasts promotes sustained cytokine secretion and survival‐promoting pathways, showing how multicellular ...
Alexandria T. Carter +5 more
wiley +1 more source
Study on rock breaking law of ring groove PDC bit mixed PDC cutter and field test
Results in EngineeringIn order to solve the problems of low rock-breaking efficiency and poor bit stability of existing PDC bits in hard formation, a kind of annular PDC bit is proposed.
Kuilin Huang +4 more
doaj +1 more source
Working Load Characteristics of the PDC-Cone Composite Bit under Impact and Scraping
Shock and Vibration, 2020 The PDC-roller hybrid bit combines the cutting structure of a tricone bit with a PDC bit. It can achieve good results, breaking rock in directional drilling, drilling in inhomogeneous formations, and drilling in formations with high levels of hardness ...
Kuilin Huang +4 more
doaj +1 more source
Long-distance practical quantum key distribution by entanglement swapping
, 2011 We develop a model for practical, entanglement-based long-distance quantum key distribution employing entanglement swapping as a key building block. Relying only on existing off-the-shelf technology, we show how to optimize resources so as to maximize ...
Amirloo +49 more
core +2 more sources