The present disclosure identifies methods and compositions for modifying photoautotrophic organisms as hosts, such that the organisms efficiently convert carbon dioxide and light into n-alkanes, and in particular the use of such organisms for the commercial production of n-alkanes and related molecules. A windowed Fourier decomposition method is used, with the window size and shape designed in consideration of the sub-sequences. During course of the blades of the cutting tool elements converging, the convex rails and the slide grooves knead a circumferential surface of a cylindrical food product passing through the central opening, thereby forming a plurality of position-fixing depressions, and the depressions gradually deepen around a central region of the cylindrical food product as the blades converge. A fluid such as a perfluorocarbon flows into the balloon to freeze the tissue adjacent the balloon, this cooling being associated with reduction of restenosis. By this way, a user lying down on the electric bed can charge an electric device through the USB receptacle without leaving the electric bed, thereby enhancing the convenience of the user. A suspension system connects the fork to the mounting assembly to provide suspension movement and includes a first transverse plate assembly attached to the mounting assembly intersected by a second plate assembly attached across the two sides of the fork.