Results 31 to 40 of about 11,478,449 (349)
Biology of Sport, 2022 This study aimed (i) to analyse the associations between serve velocity (SV) and anthropometric, ball impact and landing location parameters in total serves (TS) and fastest serves (FS) performed during an ATP Tour event; (ii) to observe differences ...
Ernest Baiget +2 more
doaj +1 more source
Meitan xuebaoAbrasive water jet is a highly efficient cutting technology. Through some sandstone cutting tests, the research on the optimal impact angle and inclined cutting mechanism of rock-like materials is carried out.
Ruifu YUAN +6 more
doaj +1 more source
Finite Time Guidance Law to Intercept Desired LOS Angle Using NTSM Control [PDF]
فصلنامه علوم و فناوری فضایی, 2018 Nonsingular terminal sliding mode (NTSM) guidance for intercepting the desired line of sight (LOS) angle in terminal phase is proposed in this paper. In order to satisfy the predefined LOS angle and to intercep into target, a nonsingular terminal sliding
Vahid Behnamgol +2 more
doaj
System for determining the angle of impact of an object on a structure [PDF]
, 1993 A method for determining the angle of impact of an object on a thin-walled structure which determines the angle of impact through analysis of the acoustic waves which result when an object impacts a structure is presented.
Gorman, Michael R., Prosser, William H.
core +1 more source
IEEE Access, 2020 In recent years, the strapdown system has become the significant trend of the development of precision guided weapons. In order to effectively hit the lightly armored targets, researchers have done a series of studies on the impact angle control. However,
Shou Zhou, Shifeng Zhang, Donghui Wang
semanticscholar +1 more source
Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing
FEBS Letters, EarlyView.Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley +1 more source
Impact of basic angle variations on the parallax zero point for a scanning astrometric satellite [PDF]
, 2017 Determination of absolute parallaxes by means of a scanning astrometric satellite such as Hipparcos or Gaia relies on the short-term stability of the so-called basic angle between the two viewing directions. Uncalibrated variations of the basic angle may
Butkevich, Alexey G. +4 more
core +1 more source
An impact angle constraint integral sliding mode guidance law for maneuvering targets interception
Journal of Systems Engineering and Electronics, 2020 An integral sliding mode guidance law (ISMGL) combined with the advantages of the integral sliding mode control (SMC) method is designed to address maneuvering target interception problems with impact angle constraints.
Wenjie Zhang +3 more
semanticscholar +1 more source
Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source
Gong-kuang zidonghuaThere has been a lack of precise methods for monitoring and evaluating the entire process of gas fracturing. However, strain monitoring can effectively record the real-time initiation and propagation of cracks. By studying the strain response of borehole
KONG Zixing +5 more
doaj +1 more source