Results 91 to 100 of about 2,998,373 (268)

Design of Automatic Tension Control System for Beam Pumping Unit Belt

Shiyou jixie, 2019
To address the slipping problem in the working process of the beam pumping unit belt, a control system which can real-time monitor the belt transmission parameters and automatically adjust the tensioning force is designed.
Xu Guotai, Li Jianwei, Sun Fengyao, Cao Lianmin   +3 more
doaj  

Diaphragm Pump System with Non-metallic Coiled Tubing Cable Complex

Shiyou jixie, 2020
Conventional beam pumping units consume much energy and they are prone to fail. Reciprocating submersible pumps are subject to wax, frequent cable damage and a short life. A new type of diaphragm pump system has been developed.
Ji Xiaoke, Hua Jian, Fang Jianguo
doaj  

Efficient Cholesteric Liquid Crystal Waveguide Polarizing Splitters for High-Sensitivity Chip-Scale Atomic Magnetometry. [PDF]

Adv Sci (Weinh)
An integrated polarimetry architecture based on a cholesteric liquid crystal waveguide polarization splitter overcomes the volumetric bottleneck in chip‐scale atomic magnetometers. By leveraging Bragg‐selective reflection and total‐internal‐reflection‐induced helicity inversion, this ultrathin device enables efficient circular polarization splitting ...
Cui Z, Wang C, Zhou X, Hou G, Hu J, Ye M, Xiao X, Chai Z, Weng Y, Zhang Y.   +9 more
europepmc   +2 more sources

Dynamic Fluorescence Modulation via Light‐Driven Competitive Protonation

Advanced Optical Materials, EarlyView.
A two‐component molecular system demonstrates reversible, light‐driven fluorescence write–erase cycling and thermal imaging. Illumination of a merocyanine photoacid transfers a proton to a highly efficient fluorescent pyridinium dye, switching its emission color; thermal relaxation reverses the process in the dark.
Serena X. Liu, Moritz E. Kleybolte, Colin van Dyck, Sergey I. Vagin, Preeti Gahtori, Antonio Scarpati, Razieh Firouzihaji, Diogo A. Galico, Ulrich S. Schubert, Julianne Gibbs, Alkiviathes Meldrum   +10 more
wiley   +1 more source

Modelling the neutralisation process in neutral beam injectors [PDF]

, 2009
High power neutral beams currently play an important role in heating, fuelling and diagnosing magnetically confined thermonuclear fusion plasmas. At the Joint European Torus (JET) in Oxfordshire, England, the formation of such a beam involves passing a ...
Fitzgerald, Niall J.
core   +1 more source

Understanding Inhomogeneous Crystallization Dynamics of Phase‐Change Materials in the Vicinity of Metallic Nanoantennas

Advanced Optical Materials, EarlyView.
Metallic dimer antennas on top of the phase‐change material Ge3Sb2Te6 are addressed with laser pulses, resulting in inhomogeneous crystallization. A self‐consistent multiphysics model is employed to simulate the crystallization and to understand the resulting shift of the antenna resonance.
Luis Schüler, Lukas Conrads, Yingfan Chen, Lina Jäckering, Sebastian Meyer, Matthias Wuttig, Thomas Taubner, Dmitry N. Chigrin   +7 more
wiley   +1 more source

油田抽油机用带传动弹性张紧装置的技术研究

Jixie chuandong, 2013
A kind of elasticity tension device applicable to the belt in belt drive system of beam-pumping unit of oil field is put forward.The structures as well as the problems of the existing tension devices are introduced,and the technical research and product ...
帖荣俊, 吴利群
doaj  

Linear and Nonlinear Optical Tuning With Sb2S3‐Based Metasurfaces

Advanced Optical Materials, EarlyView.
Sb2S3${\rm Sb}_2{\rm S}_3$ resonant metasurfaces provide large, reconfigurable optical modulation and tunable enhanced nonlinear emission across telecommunication wavelengths. Monolithic structures achieve 92% transmission modulation and 150 nm resonance tuning, while hybridization with silicon enables strong modulation at nearly half the switching ...
Amin Zamani, Meibao Qin, Gabriel Sanderson, Lu Zhang, Sara Moujdi, Qiwei Miao, Ze Zheng, Mohammadhossein Momtazpour, Christopher J. Mellor, Wending Zhang, Ting Mei, Zakaria Mansouri, Lei Xu, Mohsen Rahmani   +13 more
wiley   +1 more source

Electromagnetic Optimization Design of Disc-type Switched Reluctance Motor for Pumping Unit

Shiyou jixie, 2022
In order to avoid the problems caused by the belt drive system of the beam-pumping unit, the motor spindle needs to be connected to the reducer directly in the semi-direct drive mode.
Han Peng, Bian Dunxin, Xiong Lixin, Cheng Jianjun, Xia Qiang, Ma Hongchang, Lu Binglin   +6 more
doaj  

Soft Actuators Integrated with Control and Power Units: Approaching Wireless Autonomous Soft Robots

Advanced Robotics Research, EarlyView.
Soft robots exhibit significant development potential in various applications. However, there are still key technical challenges regarding material improvement, structure design and components integration. This review focuses on the development and challenge of soft actuators, power components, and control components in untethered intelligent soft ...
Renwu Shi, Feifei Pan, Xiaobin Ji
wiley   +1 more source