one of most frequently stated phrases of sahifat al-sajjadiyya is related to repentance and asking for god’s pardon for the sins that are not only incompatible with the infallibility of imam al-sajjad (a.s.) but are inconsistent with ordinary human beings as well. this article intends to bring up and study some of the solutions for the above-mentioned enigma. on this basis, in explanation of th...

It has been expected that space information networks (SINs), as an extension of terrestrial networks, would provide highspeed, high-capacity, global continuous communication, and data transmission services anywhere for anyone at any time. With the rapid advances in relevant technologies (e.g., satellite miniaturization technology, reusable rocket launch semiconductor technology), low-orbit sate...

The application of long baseline aided strap-down inertial navigation system (SINS/LBL) has been demonstrated to be an effective solution for accumulative position errors underwater vehicles (UVs). To address the inefficient positioning when available hydrophones are few in acoustic array, a hybrid tightly-coupled SINS/LBL is presented system. composed SINS, LBL and pressure sensor (PS). model ...

Eliot was confessing the sins of Europe against Indigenous people

To solve the unavailability of a traditional strapdown inertial navigation system (SINS) for unmanned underwater vehicles (UUVs) in the polar region, a polar grid navigation algorithm for UUVs is proposed in this paper. Precise navigation is the basis for UUVs to complete missions. The rapid convergence of Earth meridians and the serious polar environment make it difficult to establish the true...