Results 61 to 70 of about 11,584 (265)
STRUCTURAL OPTIMIZATION AND FATIGUE LIFE STUDY OF AIR HAMMER BIT
Jixie qiangduDue to the low fatigue life of the air hammer bit in the drilling process, the drilling efficieney is greatly reduced and the drilling cost is increased.
FENG ChunYu +5 more
doaj
Study on Dynamic Characteristics of drill String-drill Bit-rock System
Shiyou jixie, 2017 Drill bit, drill string and rock system as a whole, has coupled and interacted dynamic characteristics, which is neglected in most of researches. In view of this, considering the coupling of axial and lateral torsion of the lower drilling tool and the ...
Hu Zhiqiang +3 more
doaj
Study on Rock Breaking Characteristics of a Hybrid Bit
Shiyou jixie, 2020 Existing conventional PDC and roller bits are unable to meet the rock breaking requirements in deep and hard formations, difficult-to-drill formations and soft and hard formations.
吴泽兵 +4 more
doaj
Anti‐Slip Material‐Based Strategies and Approaches
Advanced Materials Technologies, EarlyView.This review highlights the principle mechanisms of slipping at the microscale, linking contact mechanics with a friction behavior model for surface interfaces. Main strategies to develop anti‐slip properties to the surfaces are discussed alongside standardized testing approaches.
Sogand Abbaspoor‐Zanjani +3 more
wiley +1 more source
Advanced Materials Technologies, EarlyView.This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane +4 more
wiley +1 more source
Alteration of the Thrust Force Versus Number of Drill Bit Usage in Cortical Bone Drilling
Journal of Orthopedic and Spine Trauma, 2016 Background: Bone drilling is a common step in orthopedic surgery. Thrust force is one of the most important parameters that can influence the quality of bone drilling.
Mohammad Javad Ein Afshar +3 more
doaj
Nitroxide‐Mediated Photo‐Polymerization: A Swiss Army Knife for Microfluidic Design
Advanced Materials Technologies, EarlyView.This article illustrates the application of NMP2 to the rapid (less than 1 h) photostructuring and sealing of model structures intended for microfluidic applications. Remarkably, the careful design of resin composition allows completing these steps by simply spreading bare monomer (i.e., no added photoinitiator) on top of the bottom layer embedding ...
Carlo Gonzato +5 more
wiley +1 more source
Energy Science & Engineering, 2019 Reverse circulation down‐the‐hole (RC‐DTH) air hammer drilling is a fast and cost‐effective method for hard rock drilling. As the air RC drill bit is the heart for RC‐DTH air hammer drilling system to form the reverse circulation, a large‐diameter RC ...
Xinxin Zhang +3 more
doaj +1 more source
Chemically Doped Conductive Polymers for Wearable Health Monitoring
Advanced Materials Technologies, EarlyView.Among conductive polymers, poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), polyaniline (PANI), and polypyrrole (PPy) are the most studied and applied. Chemical doping significantly boosts intrinsic conductivity and mechanical robustness.
Mengdi Zuo +5 more
wiley +1 more source
Quantum Electrometry of Non‐Volatile Space Charges in Diamond
Advanced Optical Materials, EarlyView.Charges are generated when nitrogen vacancy qubits in diamond are illuminated by light. Transport and trapping in an electric field leads to the formation of large, stable space charge patterns that dynamically screen applied electric fields, impacting electric field sensing and photoelectric detection.
Russell M Goldblatt +4 more
wiley +1 more source