Abstract Tianwen-1 (TW-1) is the first Chinese interplanetary mission to have accomplished orbiting, landing, and patrolling in a single exploration of Mars. After safe it essential reconstruct descent trajectory determine landing site lander. For this purpose, we processed images TW-1 optical obstacle-avoidance sensor (OOAS) digital orthophoto map (DOM) area using our proposed hybrid-matching ...

Title of Thesis: A COUPLED INTERPLANETARY – ENTRY, DESCENT AND LANDING TARGETING PROCEDURE Jeremy David Shidner, M.S., 2006 Thesis Directed by: Dr. Robert Tolson National Institute of Aerospace In NASA’s past, targeting to a Mars landing site has required iteration between the Entry, Descent and Landing (EDL) analysts at NASA Langley Research Center and the interplanetary navigators at the Jet ...

medical errors are unintentional acts that take place due to the negligence or lead to undesirable consequences in medical practice. the purpose of this study was to design a conceptual model for medical error reporting system. this applied descriptive cross-sectional research employed delphi method carried out from 2012 to 2013. the study population was medical and paramedical personnel of hea...

AIM To carry out an objective assessment of two systems of scoring immunohistochemical staining, evaluating interobserver and intraobserver error. METHODS 92 cervical tumours underwent immunohistochemical staining for p53 and epidermal growth factor receptor. Staining was assessed using two methods: a standard 4 point scale and a descriptive method, performed by three observers. Interobserver...

Simulation and the resulting prediction of the dynamic behavior of an aircraft and its landing gear system during ground maneuvers is an essential part in the design process. A realistic estimation of unwanted oscillations, such as gear walk and shimmy, for the landing gear and whole aircraft can be readily obtained with an MBS-model. It is then possible to adjust the model for changes in the s...

Possibly the most critical phase of an Unmanned Air Vehicle (UAV) flight is landing. To reduce risk due to pilot error, autonomous landing systems can be used. Environmental disturbances such as wind shear jeopardize safe landing, therefore a well-adjusted and robust control system required maintain performance requirements during The paper proposes loop-shaping-based Model Predictive Control (...

Introduction: Chronic nasal obstruction due to adenoid hypertrophy is a very common disorder. Although the clinical assessment of adenoid hypertrophy is essential, its real value in young children is difficult to evaluate. The purpose of this prospective study was to validate a simple clinical score to predict the severity of adenoid obstruction and to evaluate the relationship between this met...