rolling-based seismic isolation systems, in which rollers of circular or non-circular section are used, are less expensive and easier to manufacture. however, this type of isolation suffers from either lack of restoring or re-centering capability, or weakness against uplift forces. to resolve the first shortcoming the use of elliptical as well as pillow-shape rolling parts has been suggested, a...

A compensation implementation scheme of the advanced targeting process based on fine tracking system is proposed in this paper. Based working quantum positioning (QPS) and its acquisition, pointing (ATP) system, subsystem ATP designed. six orbital parameters satellite Mozi, azimuth angle pitch are transformed into dynamic center system. The deviation analyzed. In Simulink, simulation experiment...

geospatial information system (gis) has emerged as a very powerful tool for capturing, storing, analyzing, managing, and presenting data that is linked to location. the location information, which is usually obtained from existing maps or the global positioning systems (gps), refers to different coordinate and map projection systems. therefore, unification of the coordinate and mapping systems ...

The apparent position of the Sun in relation to any surface is defined by solar incident angle. angle forms vector and normal observed surface. spatial aforementioned vectors determined coordinates, which include: declination, latitude, hour angle, longitude, elevation azimuth surface, inclination north-south direction east-west direction. This article describes detail theoretical model for det...

An accurate initial alignment must be required for inertial navigation system (INS). The performance of initial alignment directly affects the following navigation accuracy. However, the rapid convergence of meridians and the small horizontalcomponent of rotation of Earth make the traditional alignment methods ineffective in polar regions. In this paper, from the perspective of global inertial ...