Abstract: The present invention relates to a solution for solving an ill-posed inverse problem in image analysis, e.g. in an electron tomography application in order to recover a structure of a sample. The solution is provided for instance as a method comprising steps of determining reliable prior knowledge about the solution, determining initial guess for the solution and determining the corresponding forward operator, deciding upon model of stochasticity, deciding on suitable regularization method, deciding on updating scheme, and producing a sequence using the set configuration.

Abstract: The present invention relates to a solution for solving an ill-posed inverse problem in image analysis, e.g. in an electron tomography application in order to recover a structure of a sample. The solution is provided for instance as a method comprising steps of determining reliable prior knowledge about the solution, determining initial guess for the solution and determining the corresponding forward operator, deciding upon model of stochasticity, deciding on suitable regularization method, deciding on updating scheme, and producing a sequence using the set configuration.

Abstract: A tube shaft for a vacuum cleaner the shaft (10) having an upper tube part (15) and a lower tube part turnably connected to one another and each including at least two tube sections (15c,15e,16b,16c). The tube sections of each tube part are inclined with respect to one another. The lower tube part (16) includes an end section (16b) supporting a nozzle (14), the nozzle having a nozzle part (14a) and a connecting part (14b). The connecting part is connected to the end section of the lower tube part whereas an upper end (15f) of the upper tube part (15) is connected to a hose, a tube handle (11) or the like. The lower tube part (16) is arranged to be turned about 180° with respect to the upper tube part (15) as well as to the nozzle part (14a) from a first turning position, wherein said end section (16b) is inclined a first angle (&agr;) with respect to the floor, to a second turning position, wherein the end section (16b) is inclined a second, relatively smaller angle (&bgr;) with respect to the floor.

Abstract: A tube shaft (14) for a vacuum cleaner having an upper end and a lower end. The upper end is connected to a tube handle (15) or the like communicating with a vacuum source and a particle separating means. The lower end is connected to a nozzle (13). The tube shaft (14) includes at least two sections (17,18) arranged telescopically with respect to one another and the parts of the sections which are telescopically arranged with respect to one another are curved.

Abstract: A wet cleaning suction nozzle having a suction opening (22) facing the floor and communicating with a nozzle outlet tube (12), scraper blades (24), one located in front of, and one behind, the suction opening as seen in the direction of movement of the nozzle, wherein the lower ends of the scraper blade abut the floor when the nozzle is used. The suction opening (22) is located closer to the floor than fastening points (23) of the scraper blades in the nozzle. The nozzle is used on hard, as well as soft floors, without being converted, and the nozzle includes spacers (31), which prevent the nozzle opening (22) from touching the floor when the nozzle is used on a hard floor, but which permits the suction opening to abut the floor when the nozzle is used on a soft floor.