Ultrafast, high-intensity X-ray free-electron lasers can perform diffraction imaging of single protein molecules. Various algorithms have been developed to determine the orientation of each single-particle diffraction...
详细信息
Ultrafast, high-intensity X-ray free-electron lasers can perform diffraction imaging of single protein molecules. Various algorithms have been developed to determine the orientation of each single-particle diffraction pattern and reconstruct the 3D diffraction intensity. Most of these algorithms rely on the premise that all diffraction patterns originate from identical protein molecules. However, in actual experiments, diffraction patterns from multiple different molecules may be collected simultaneously. Here, we propose a predicted model-aided one-step classification-multireconstruction algorithm that can handle mixed diffraction patterns from various molecules. The algorithm uses predicted structures of different protein molecules as templates to classify diffraction patterns based on correlation coefficients and determines orientations using a correlation maximization method. Tests on simulated data demonstrated high accuracy and efficiency in classification and reconstruction.
At the Samara State Aerospace University work on developing of the such nanosatellite is in progress. The main objectives of the nanosatellite are its motion dynamics studying and orientation and stabilization algorit...
详细信息
ISBN:
(纸本)9781510805880
At the Samara State Aerospace University work on developing of the such nanosatellite is in progress. The main objectives of the nanosatellite are its motion dynamics studying and orientation and stabilization algorithm workout, using the built-in measuring and actuating means which are a part of on-board modules: the three-axis magnetometer placed on the on-board computer;Sun sensors, the angular-rate sensors placed on solar battery panels;magnetic coils. The on-board algorithm for nanosatellite orientation and stabilization system based on the two-vector algorithm of the nanosatellite angular location determination and the nanosatellite angular rate damping algorithm is developing. (C) 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.
At the Samara State Aerospace University work on developing of the such nanosatellite is in progress. The main objectives of the nanosatellite are its motion dynamics studying and orientation and stabilization algorit...
详细信息
At the Samara State Aerospace University work on developing of the such nanosatellite is in progress. The main objectives of the nanosatellite are its motion dynamics studying and orientation and stabilization algorithm workout, using the built-in measuring and actuating means which are a part of on-board modules: the three-axis magnetometer placed on the on-board computer; Sun sensors, the angular-rate sensors placed on solar battery panels; magnetic coils. The on-board algorithm for nanosatellite orientation and stabilization system based on the two-vector algorithm of the nanosatellite angular location determination and the nanosatellite angular rate damping algorithm is developing.
暂无评论