Results 61 to 70 of about 1,445,518 (266)

Extracting the Non-ObservableStates in Alignment & Calibration Process for Gimballed Inertial Navigation Systems [PDF]

فصلنامه علوم و فناوری فضایی, 2014
This paper presents a method for calculation the non observable states in alignment and calibration process in gimballed inertial navigation system, using estimation method in static linear system and heuristic optimization algorithms. The non observable
S. M. SalehiAmiri, A. A. Nikkhah, H. Nobahari   +2 more
doaj  

Improved Multistage In-Motion Attitude Determination Alignment Method for Strapdown Inertial Navigation System

Sensors, 2019
This paper derives an improved multistage in-motion attitude determination alignment (IMADA) for strapdown inertial navigation system, which integrates the traditional IMADA and the designed dual velocity-modeling IMADA, as well as the multiple repeated ...
Haiyan Qiao, Meng Liu, Hao Meng, Mengjun Wang, Wei Ke   +4 more
doaj   +1 more source

Long-time properties of MHD turbulence and the role of symmetries

, 2012
We investigate long-time properties of three-dimensional MHD turbulence in the absence of forcing and examine in particular the role played by the quadratic invariants of the system and by the symmetries of the initial configurations.
A. Pouquet, Annick Pouquet, Julia E. Stawarz, Marc-Etienne Brachet, S. Galtier   +4 more
core   +1 more source

Characterizing Parental Concerns About Lasting Impacts of Treatment in Children With B‐Acute Lymphoblastic Leukemia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background B‐acute lymphoblastic leukemia (B‐ALL) is the most common pediatric cancer, and while most children in high‐resource settings are cured, therapy carries risks for long‐term toxicities. Understanding parents’ concerns about these late effects is essential to guide anticipatory support and inform evolving therapeutic approaches ...
Kellee N. Parker, Sarah W. Alexander, Lisa M. Jacola, Kimberly A. Buff, Kyobin Hwang, Elham Hashemi, Gregory Stoddard, Lindsay A. Jibb   +7 more
wiley   +1 more source

Inertia and Change in the Early Years: Employment Relations in Young, High Technology Firms [PDF]

, 1996
[Excerpt] This paper considers processes of organizational imprinting in a sample of 100 young, high technology companies. It examines the effects of a pair of initial conditions: the founders\u27 models of the employment relation and their business ...
Baron, James N, Burton, M. Diane, Hannan, Michael T   +2 more
core   +3 more sources

Clinical Characteristics and Prognostic Risk Factors for Pediatric B‐Cell Lymphoblastic Lymphoma: A Multicenter Retrospective Cohort Study for China Net Childhood Lymphoma

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background B‐cell lymphoblastic lymphoma (B‐LBL) represents a rare variety of non‐Hodgkin lymphoma, with limited research on its biology, progression, and management. Methods A retrospective analysis was performed on the clinical characteristics of 256 patients aged ≤18 years who received treatment under the China Net Childhood Lymphoma (CNCL)‐
Zhijuan Liu, Jian Wang, Ling Jin, Yanlong Duan, Fu Li, Yueping Jia, Leping Zhang, Xiaojun Yuan, Wei Liu, Ying Liu, Ansheng Liu, Mincui Zheng, Yunpeng Dai, Lian Jiang, Lirong Sun, Xiaowen Zhai, Rong Liu, Chunju Zhou, Zifen Gao, Yonghong Zhang, Xiaomei Yang   +20 more
wiley   +1 more source

A Fast-Initial Alignment Method With Angular Rate Aiding Based on Robust Kalman Filter

IEEE Access, 2019
In this paper, a fast-initial alignment method with angular rate aiding based on robust Kalman filter is proposed. First, the traditional system model of the initial alignment is derived, and the angular rate aiding method in the navigation frame is ...
Xiang Xu, Jiayi Lu, Tao Zhang
doaj   +1 more source

The Large Quasar Reference Frame (LQRF) - an optical representation of the ICRS

, 2009
The large number and all-sky distribution of quasars from different surveys, along with their presence in large, deep astrometric catalogs,enables the building of an optical materialization of the ICRS following its defining principles.
A. H. Andrei, Adelman-McCarthy, Andrei, Arias, Arias, Assafin, Assafin, C. Barache, D. N. da Silva Neto, da Silva Neto, da Silva Neto, F. Taris, Feissel, Fey, Fienga, Fienga, Hoeg, Hoeg, J. I. B. Camargo, J. L. Penna, J. Souchay, Lasker, M. Assafin, Ma, Monet, N. Zacharias, Perryman, Petrov, Pier, R. L. Smart, R. Vieira Martins, S. Bouquillon, Schwan, Souchay, Souchay, Taff, Taff, Véron-Cetty, Zacharias, Zacharias   +39 more
core   +2 more sources

Initial alignment of point clouds using motors [PDF]

Proceedings of the Computer Graphics International Conference, 2017
This paper presents an approach for initial alignment or coarse registration of a partial 3D point cloud of objects. The method is based on computing the centroid of the points in the point cloud, and a line derived from the surface normals. This approach uses conformal geometric algebra and non-linear least squares optimization to achieve the results.
Adam Leon Kleppe, Lars Tingelstad, Olav Egeland   +2 more
openaire   +1 more source

Predicting the Future Burden of Renal Replacement Therapy in Türkiye Using National Registry Data and Comparative Modeling Approaches

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Chronic kidney disease is a growing public health problem worldwide, and the number of patients requiring renal replacement therapy is steadily increasing. Türkiye has experienced a similar rise in both the incidence and prevalence of renal replacement therapy over the past decades; however, national‐level projections of future ...
Arzu Akgül, Neriman Sıla Koç, Berrak Itır Aylı   +2 more
wiley   +1 more source