Results 31 to 40 of about 12,955,611 (331)

Biased PNG Law for Impact-Time Control

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, 2013
This paper proposes a biased proportional navigation guidance (PNG) law to control the impact time, that can be used for salvo attacks or cooperative missions of missiles. To derive the guidance command of the proposed law, we introduce a polynomial function of the command with two coefficients, one of which is to achieve zero miss-distance and the ...
Kim, TH Kim, Tae-Hun, Lee, CH Lee, Chang-Hun, Tahk, MJ Tahk, Min-Jea, Jeon, IS Jeon, In-Soo   +3 more
openaire   +2 more sources

Accessibility of Nonlinear Time-Delay Systems [PDF]

, 2017
A full characterization of accessibility is provided for nonlinear time-delay systems. It generalizes the rank condition which is known for weak controllability of linear time-delay systems, as well as the celebrated geometric approach for delay-free ...
Califano, Claudia, Moog, Claude H.
core   +3 more sources

Postural adjustments in catching: on the interplay between segment stabilization and equilibrium control [PDF]

, 2013
The purpose of this study was to investigate postural adjustments in one-handed ball catching. Specifically, the functional role of anticipatory postural adjustments (APA) during the initial arm raising and subsequent postural adjustments (SPA) for ...
Bennett, Simon J, De Clercq, Dirk, Lenoir, Matthieu, Savelsbergh, Geert JP, Tijtgat, Pieter, Vanrenterghem, Jos   +5 more
core   +6 more sources

Impact of ASOS Real-Time Quality Control on Convective Gust Extremes in the USA

Meteorology, 2023
Most damage to buildings across the contiguous United States, in terms of number and total cost, is caused by gusts in convective events associated with thunderstorms. Their assessment relies on the integrity of meteorological observations.
Nicholas John Cook
doaj   +1 more source

Preventive conservation strategies for sustainable urban pollution control in museums [PDF]

, 2000
The last 40 years have seen major changes in the sources and concentrations of urban pollution (nitrogen dioxide, sulfur dioxide, hydrogen sulfide, and particulates).
Blades, N, Cassar, M, Croxford, B, Oreszczyn, T   +3 more
core   +1 more source

Choice of injection time of conscious sedation and its impact on pain control in colonoscopy

Frontiers in Surgery, 2022
PurposeThe aim of this study was to identify the effect of different injection times on pain during colonoscopy procedure.MethodsIn this retrospective study, the data of patients who underwent colonoscopy from June 2020 to September 2020 were assessed to
Mingli Su, Mingli Su, Tingting Chen, Qinghua Zhong, Qinghua Zhong, Dezheng Lin, Dezheng Lin, Wei Liu, Wei Liu, Yuping Su, Jiaxin Deng, Jiaxin Deng, Jiawei Zhang, Jiawei Zhang, Jiancong Hu, Jiancong Hu, Xuefeng Guo, Xuefeng Guo   +17 more
doaj   +1 more source

Conscious monitoring and control (reinvestment) in surgical performance under pressure. [PDF]

, 2012
Research on intraoperative stressors has focused on external factors without considering individual differences in the ability to cope with stress. One individual difference that is implicated in adverse effects of stress on performance is "reinvestment,"
A Prabhu, AI Thuraisingam, AP Tendulkar, B Bohm, BJ Chell, CM Liao, CM Wetzel, CY Wan, DJ Scott, EM Ritter, FF Zhu, FF Zhu, I Hassan, J Sexton, Jamie M. Poolton, JM Poolton, JM Poolton, JP Maxwell, JP Maxwell, JP Maxwell, JP Poolton, K Moorthy, Karen Ngo, Mark R. Wilson, MR Wilson, MW Eysenck, MW Eysenck, Neha Malhotra, NP Kinrade, NP Kinrade, PB Andreatta, R Berguer, Rich S. W. Masters, RS Holzman, RS Lazarus, RSW Masters, RSW Masters, RSW Masters, RSW Masters, RSW Masters, RSW Masters, RSW Masters, RSW Masters, RSW Masters, S Arora, S Arora, S Arora, S Arora, S Yule, SK Sarker, TM Marteau, V Datta, V Datta, WL Wong   +53 more
core   +2 more sources

Impact of the Pilot Volume-Based Drug Purchasing Policy in China: Interrupted Time-Series Analysis with Controls

Frontiers in Pharmacology, 2021
Centralizing procurement for prescription drugs has the potential to reduce drug spending by creating economies of scale and by improving purchasing power. In March 2019, the Chinese government launched a volume-based purchasing (VBP) pilot program using
Yilin Chen, Xu Ji, Xu Ji, Hong Xiao, Hong Xiao, Joseph M Unger, Joseph M Unger, Yi Cai, Yi Cai, Zongfu Mao, Kai Yeung, Kai Yeung   +11 more
doaj   +1 more source

A Geometry-Based Guidance Law to Control Impact Time and Angle under Variable Speeds

Mathematics, 2020
To provide a feasible solution for a variable speed unmanned aerial vehicle (UAV) to home on a target with impact time and angle constraints, this paper presents a novel geometry-based guidance law composed of trajectory reshaping and tracking.
Xinghui Yan, Minchi Kuang, Jihong Zhu
doaj   +1 more source

Three-Dimensional Impact Time and Angle Control Guidance Based on MPSP

International Journal of Aerospace Engineering, 2019
A new nonlinear guidance law for air-to-ground missile cooperation attacks is proposed in this paper. This guidance law enables missiles with different initial conditions to attack targets simultaneously, and it can also precisely satisfy the terminal ...
Yang Li, Hao Zhou, Wanchun Chen
doaj   +1 more source