Results 61 to 70 of about 15,062 (254)
Efficient scheme for three-photon Greenberger-Horne-Zeilinger state generation
, 2012 We propose an efficient scheme for the generation of three-photon Greenberger-Horne-Zeilinger (GHZ) state with linear optics and postselection. Several devices are designed and a two-mode quantum nondemolition (QND) detection is introduced to obtain the ...
Barrett +49 more
core +1 more source
Daylight operation of a free space, entanglement-based quantum key distribution system [PDF]
, 2008 Many quantum key distribution (QKD) implementations using a free space transmission path are restricted to operation at night time in order to distinguish the signal photons used for a secure key establishment from background light.
Gerhardt, Ilja +4 more
core +2 more sources
Business Strategy and the Environment, EarlyView.ABSTRACT Circular economy (CE) is increasingly adopted by the manufacturing industry to decouple economic growth from environmental impacts by optimizing resource use and minimizing waste generation. Nevertheless, circular manufacturing often triggers systemic responses that diminish or offset their potential environmental gains, resulting in the so ...
Mariantonietta Ferrante +2 more
wiley +1 more source
Deep Underground Science and Engineering, EarlyView.A lithology identification while drilling method was developed, integrating an automated cuttings sampling system, a smart drilling rig, and an ensemble learning model. Underground trials achieved 97.42% accuracy in real‐time identification of cuttings lithology and composition, enhancing hazard management and supporting unmanned drilling technology in
Kun Li +7 more
wiley +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
Research on Precise Identification of Rock Strength Based on Bolt Drilling Parameters
Energy Science &Engineering, EarlyView.Drilling detection test platform. ABSTRACT During roadway excavation, the presence of weak interlayers and fractured rock masses significantly affects roof stability. To achieve timely and effective roadway support, it is crucial to identify and predict different rock types based on drilling signals from roof bolters.
Qiang Zhu +4 more
wiley +1 more source
Development of New Multiple Compound Cutting Bit
Shiyou jixie, 2016 In order to raise the ROP of bit in the abrasive hard formation and extend bit service life, a new multiple compound cutting bit is developed. The bit adopts the three-level cutting structure of PDC+cone-shaped PDC tooth+impregnated diamond segment, with
Yang Shunhui
doaj
Development of PDC Bit with Axe-shaped Teeth and its Application in East China Sea
Shiyou jixie, 2021 The PDC bits used in many wells in the East China Sea had low ROP and small footage in the process of drilling deep formation. After the bits were pulled out, it was found that the cutting teeth had been worn severely.
Li Qian +5 more
doaj
Small, EarlyView.This study presents an additive‐free aerosol jet 3D printing technique for assembling 2D MXene nanosheets into complex, customizable, high‐aspect‐ratio 3D microarchitectures without binders. By leveraging real‐time ink thickening, the authors also fabricate 3D microsupercapacitors with interdigitated electrodes that holds breakthrough device areal ...
Chunshan Hu +4 more
wiley +1 more source
Conglomerate Rock Breaking Technology with New PDC Cutter and Its Application
Shiyou jixie, 2019 In oil and gas drilling, PDC bit has become an indispensable downhole tool for rock breaking. However, conglomerate formation is still the restricted area for PDC bit. At present, most of conglomerate formations are drilled using roller cone bit.
Zhu Xiaolin +5 more
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