Results 31 to 40 of about 14,048 (222)
Experimental Study on Granite Broken by PDC Bit under High Temperature and High Pressure
Shiyou jixie, 2021 As the exploration and development of oil and gas gradually advance to the deep layer, the formation temperature and pressure keep increasing. The efficiency of PDC bit breaking deep hard rock under high temperature and high pressure is reduced, and the ...
Shi Huaizhong +5 more
doaj
Advanced Science, EarlyView.In hypoxic microenvironment, WNT5A is predominantly secreted by tumor‐associated macrophages. Hypoxia‐induced WTAP mediates ROR1 stability by m6A modifications in a HuR‐dependent manner in Glioma stem cells (GSCs). WNT5A activates the WNT pathway via ROR1 binding on GSCs, driving glioma‐derived endothelial cells (GDECs) differentiation.
Xiaoyong Chen +15 more
wiley +1 more source
New Progress and Future Development of PDC Bit
Shiyou jixie, 2016 A series of new PDC bits have been developed in foreign countries in order to raise rock breaking efficiency, extend bit service life and reduce trips, drilling cycle and drilling cost.
Pan Jun, Wang Minsheng, Guang Xinjun
doaj
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
Advanced Science, EarlyView.A biomimetic Prussian White nanoparticle (PW) is engineered to achieve long‐term local retention and orchestrate immunometabolic‐epigenetic remodeling for sciatic nerve regeneration. PW directly targets hexokinase 2 to suppress glycolysis, thereby elevating α‐ketoglutarate and driving Kdm4a/b‐mediated demethylation of H3K9me3.
Wenying Xu +6 more
wiley +1 more source
Analysis of Stick-Slip Vibration of PDC Bit under Sudden Increase of Formation Hardness
Shiyou jixie, 2019 In drilling an interbedded soft and hard formation with PDC bit, it is prone to cutter crack and damage. To address the issue, the stick-slip vibration characteristics of PDC bit during the sudden increase of formation hardness were studied.
Zha Chunqing +3 more
doaj
Influence of PDC Cutter Diameter on Cutting Force
Shiyou jixie, 2023 PDC bit design needs to be customized depending upon the formation lithology characteristics, and especially the diameter of PDC cutter is an important parameter in bit design optimization.A series of laboratory simulation tests were conducted to explore
Wei Jiusen +4 more
doaj
Modelling of an effluence of drilling fluid from hydraulic holes of PDC bits [PDF]
Компьютерные исследования и моделирование, 2013 In this article some results of mathematic modelling of an effluence of drilling fluid from hydraulic holes of PDC bit are presented. Distribution of velocity and pressure in borehole bottom are received, and erosion of interior surface of hydraulic ...
Vitaly Anatolevich Bruyaka +3 more
doaj +1 more source
Analysis of Kolmogorov Flow and Rayleigh-B\'enard Convection using Persistent Homology
, 2015 We use persistent homology to build a quantitative understanding of large complex systems that are driven far-from-equilibrium; in particular, we analyze image time series of flow field patterns from numerical simulations of two important problems in ...
Kramar, Miroslav +7 more
core +1 more source
Gel‐Amin for Improving Extracellular Recordings of Cardiomyocytes in a 3D Microphysiological System
Advanced Electronic Materials, EarlyView.This work combines a conductive collagen‐based hydrogel with a laser‐cut and assembly technique to fabricate microphysiological systems that improve extracellular recordings of cardiomyocytes in 3D on microelectrode arrays. The inclusion of choline acrylate into GelMA imparts a higher electrical conductivity and improves the signal‐to‐noise ratio of on‐
Dominic Pizzarella +4 more
wiley +1 more source