Results 31 to 40 of about 172,763 (302)
Jixie chuandong, 2022 Hysteresis stiffness is an inherent property of harmonic gear drive. In the traditional dynamic modeling of harmonic gear drive，the stiffness is considered as fixed stiffness or piecewise fixed stiffness，which will lead to reduction of the accuracy of ...
Linfeng Qiu +5 more
doaj
Harmonic and rational harmonic driving of microresonator soliton frequency combs
Optica, 2020 With demonstrated applications ranging from metrology to telecommunications, soliton microresonator frequency combs have emerged over the past decade as a remarkable new technology. However, standard implementations allow only for the generation of combs whose repetition rate is tied closely to the fundamental resonator free ...
Yiqing Xu +7 more
openaire +2 more sources
A 2GHz GaN Class-J power amplifier for base station applications [PDF]
, 2011 The design and implementation of a high efficiency Class-J power amplifier (PA) for base station applications is reported. A commercially available 10 W GaN HEMT device was used, for which a large-signal model and an extrinsic parasitic model were ...
McGeehan, JP, Mimis, K, Morris, KA
core +2 more sources
, 2003 We propose an inductive method to measure critical current density $J_c$ in bulk superconductors. In this method, an ac magnetic field is generated by a drive current $I_0$ flowing in a small coil mounted just above the flat surface of superconductors ...
Mawatari, Yasunori +2 more
core +1 more source
Enhanced Torque Control of a PMSM Supplied by a Four-Leg Voltage Source Inverter Using the Third Harmonic [PDF]
, 2008 This paper investigates an electrical drive composed of a four-leg voltage source inverter and a three-phase starconnected surface permanent magnet synchronous machine with concentrated windings. The inverter fourth leg is clamped to the neutral point of
GYSELINCK, Johan +2 more
core +6 more sources
Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system
FEBS Letters, EarlyView.Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley +1 more source
A cusp electron gun for millimeter wave gyrodevices [PDF]
, 2010 The experimental results of a thermionic cusp electron gun, to drive millimeter and submillimeter wave harmonic gyrodevices, are reported in this paper.
A. D. R. Phelps +13 more
core +1 more source
Molecular Oncology, EarlyView.Nanosecond infrared laser (NIRL) low‐volume sampling combined with shotgun lipidomics uncovers distinct lipidome alterations in oropharyngeal squamous cell carcinoma (OPSCC) of the palatine tonsil. Several lipid species consistently differentiate tumor from healthy tissue, highlighting their potential as diagnostic markers.
Leonard Kerkhoff +11 more
wiley +1 more source
Jixie chuandong, 2020 In the process of harmonic drive（HD），the double-circular-arc tooth profile（DCTP） can effectively avoid cusp meshing. In order to further optimize the double arc profile and improve the performance of the HD，based on the modified kinematic method exact ...
Anfu Yuan, Shengfeng Qiu, Xukai Shi
doaj
Non-harmonic response of relativistic particle to driving harmonic force
Revista Brasileira de Ensino de Física, 2023 We consider the properties of one-dimensional oscillations of a relativistic particle under a driving harmonic force. It is found that in the general case the speed oscillations are an infinite sum of odd sinusoidal and even cosinusoidal waves. In the limiting case of the ultra-relativistic particle, they represent a square wave.
openaire +3 more sources