Results 71 to 80 of about 643,401 (321)
Advanced Science, EarlyView.This study tests NeuroD1 AAV‐based gene therapy in a non‐human primate Alzheimer's disease model. The therapy prevents neuronal damage, inhibits hippocampal atrophy, and reduces neuroinflammation. It also repairs vascular and blood‐brain barrier damage, restores cerebrospinal fluid biomarkers, enhances hippocampal glucose metabolism, and improves ...
Zhouquan Jiang +21 more
wiley +1 more source
Simulation of the Drill String Vibration Signal System
Shiyou jixie, 2015 To understand the signal transmission processes and rules as well as the structure and components of signals inside the drill string,through establishing signal transmission model,a drill string vibration simulation software has been developed based on ...
宋一晨, 吕苗荣, 陆健
doaj
A Novel Mesoscopic Drill Bit Model for Deep Drilling Applications
Modelling, 2023 This paper deals with the development of a novel mesoscopic model of polycrystalline diamond compact (PDC) drill bits that can be implemented in complex drill string models for simulations to analyse the influence of rock inhomogeneities or the impact of
Mohamed Ichaoui +2 more
doaj +1 more source
Експериментальні дослідження на моделях компоновок низу бурильної колони [PDF]
, 2012 Описано експериментальні дослідження на моделях компоновок низу бурильної колони у викривленому стовбурі свердловини. Описано конструкція експериментального стенда, методика математичного моделювання, технологія проведення експерименту, критерії ...
Мілостян, М. О. +3 more
core
Modelling of deep wells thermal modes [PDF]
, 2019 Purpose. Investigation of various heat-exchange conditions influence of the tower liquid on the deep wells thermal conditions. Methods. Methods of heat-exchange processes mathematical modeling are used.
Blyuss, B +4 more
core +1 more source
Stress Analysis on Drilling String Vibration in Gas Drilling
Energy Procedia, 2012 AbstractUsing the finite element method, attempting to solve the serious drilling tools failure in gas drilling, this paper modelled the transient response of string vibration, and worked out the distribution regularity of the transient stress at two different drilling states: gas and mud drilling.
Jianhong, Fu +6 more
openaire +1 more source
Soft Artificial Ciliary Brush with Integrated Haptic Feedback for Efficient Airway Mucus Cleaning
Advanced Intelligent Systems, EarlyView.A fundamental mucus cleaning mechanism is reported, which utilizes both artificial cilia mechanical sweeping and suction‐based mucus cleaning. A novel haptic feedback interface for the artificial cilia provides touch feedback on tissue contact, enhancing operator control and safety.
Zhongming Lyu +7 more
wiley +1 more source
Development of Similarity Theory-based Horizontal Well Drill String Test Apparatus
Shiyou jixie, 2016 In order to conduct research on dynamic properties of drill string in the horizontal well,a horizontal well drill string test apparatus is developed based on parameter correspondence between test model and site prototype.The parameter correspondence is ...
Ren Fushen +3 more
doaj
Dynamic analysis of sonic vibration drilling string with the sampling tool
Alexandria Engineering Journal, 2022 Sonic vibration sampling technology is widely used due to its high sample fidelity, low disturbance to the stratum and environmental protection. The influence of the diameter variation of sonic drill string caused by the sampling tube on the axial ...
Liya Liu +3 more
doaj +1 more source
Study on Drill String Stick-slip Vibration Pattern Under Bit-Rock Interaction
Shiyou jixie, 2023 Stick-slip vibration leads to high-frequency shear stress on drill string and premature fatigue of drill string.Therefor,the torsional vibration model of drill string system considering bit-rock interaction was built by coupling the bit-rock interaction ...
Xing Xuesong +4 more
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