Results 81 to 90 of about 2,424 (251)
Stick-Slip Vibration Suppression in Drill String Using Observer-Based LQG Controller. [PDF]
Sensors (Basel), 2022 Riane R +4 more
europepmc +1 more source
Smart Molecules, EarlyView.A 3D‐bioprinted platform with stem cells activates “nerve‐bone” signaling by enabling the spatiotemporal delivery of Nell‐1. This activation enhances neurovascular and bone regeneration through the CYFIP1 cascade. In rat calvarial defects, the platform doubled bone regeneration and nerve repair and tripled vascular density, resulting in superior ...
Minjia Zhu +11 more
wiley +1 more source
Computer simulation of a drilling bit feed rate regulator comprising of a dc motor
Известия высших учебных заведений: Проблемы энергетики, 2017 This paper considers the possibility of applying a drawworks DC motor and a magnetic powder brake as an active bit feed rate regulator. A dynamic mathemat-ical model of the DC motor is presented.
O. V. Nikulin, V. A. Shabanov
doaj +1 more source
Research on damage progression of drill string material based on the extended finite element method. [PDF]
Sci Prog, 2021 Ying Z, Zhanghua L, Chenxin W, Brice NF.
europepmc +1 more source
steel research international, EarlyView.This study quantifies axial and torsional long‐life fatigue (LLF) behavior of three carbide‐rich PM‐HIP tool steels, correlating LLF strength with intrinsic defect size and cleanliness, thereby extracting material‐specific mean stress sensitivities and Haigh diagrams.
Lennart Mirko Scholl +4 more
wiley +1 more source
Research on a Measurement Method for Downhole Drill String Eccentricity Based on a Multi-Sensor Layout. [PDF]
Sensors (Basel), 2021 Li H, Wang R.
europepmc +1 more source
Structural Concrete, EarlyView.Abstract Steel fiber reinforced concrete (SFRC) enhances the flexural capacity of flat slabs and, due to its effectiveness in statically redundant bi‐dimensional elements, represents a viable alternative to conventional reinforcement. Although numerous studies have investigated the flexural behavior of SFRC slabs with and without bonded reinforcement ...
Chiara Gaddi +2 more
wiley +1 more source
Integrating large mammalian herbivores into Dynamic Global Vegetation Models: Status and next steps
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Zoogeochemistry, the study of how animals influence elemental cycling within ecosystems, bridges the fields of zoology, ecology and biogeochemistry. Yet, most terrestrial ecosystem models, especially Dynamic Global Vegetation Models (DGVMs), remain largely plant‐centric
Yue Cheng +10 more
wiley +1 more source
Shiyou jixieIn response to the demand for plugging old wells of CO2 gas storage under the carbon peak and carbon neutrality goals， to address the challenges of deploying wireline logging tools to the bottomhole of highly-deviated and complex-structure wells during ...
Ren Xianke +6 more
doaj +1 more source
Journal of the Royal Anthropological Institute, EarlyView.Our understanding of the recolonization of northwest Europe in the period leading up to the Lateglacial Interstadial relies heavily on discoveries from Gough's Cave (Somerset, UK). Gough's Cave is the richest Late Upper Palaeolithic site in the British Isles, yielding an exceptional array of human remains, stone and organic artefacts, and butchered ...
Silvia M. Bello +2 more
wiley +1 more source