Abstract: A transient electromagnetic device with variable shape and turns includes squares, a transmitting coil carrying frame, a transmitting coil, a turns-variable device, a current generator and a working power supply. The transmitting coil carrying frame is arranged inside the transmitting coil; the transmitting coil carrying frame is configured as a carrier of the transmitting coil, and configured for adjusting a side length of the transmitting coil and a shape of the transmitting coil; the square is configured for clamping and connecting the transmitting coil and the transmitting coil carrying frame to fix the transmitting coil to the transmitting coil carrying frame. The current generator is configured for generating transient current; the turns-variable device is configured for changing the turns of the transmitting coil; and the transmitting coil is configured for transmitting the transient current to a target area to be measured.

Abstract: Disclosed is a leaping search algorithm for similar sub-sequences in character sequences and an application thereof in searching in a biological sequence database. The algorithm comprises: S0, constructing an FMD index and a lookup table for a database; S1, fetching, from the lookup table, a bi-interval of a sub-sequence with k characters in query sequences; S2, sequentially finding matching areas on the left of the k seed by using a backward search algorithm; S3, applying a forward search algorithm to an interval that has not been shrinked in step S2, to find matching areas on the right of the k seed; S4, checking whether the current detecting position is the end of the query sequence or not, and if yes, the algorithm ends, otherwise, proceeding to step S5; and S5, leaping forward w-k+1 positions from the current detecting position, and repeating steps S2 to S5. The lookup table proposed in the present invention features small memory space and a high access efficiency.

Abstract: Methods and systems for obtaining a reconstruction of an object, the reconstruction of the object comprising an inverse problems. Expressing the reconstruction of the object as a optimization problem with total variation regularization, and obtaining the reconstruction of the object from convergence of the iterations, an object being an input/representation of input to a system, the system providing output data resulting from the input, the object being reconstructed from the output data obtained from interaction of the object with the system.

Abstract: Methods and systems for obtaining a reconstruction of an object, the reconstruction of the object comprising an inverse problems. The method includes expressing the reconstruction of the object as a optimization problem with total variation regularization, and obtaining the reconstruction of the object from convergence of the iterations, an object being an input/representation of input to a system, the system providing output data resulting from the input, the object being reconstructed from the output data obtained from interaction of the object with the system.