Abstract: An optical recognition pattern for length measurement is mounted on an optical contact surface and includes a plurality of optical recognition units, each of which corresponds to a length value. The sequence of the optical recognition units on the optical contact surface is consistent with that of the corresponding length values in such a way that the optical recognition pattern imitating the conventional measuring ruler can be constituted. Besides, the optical recognition pattern can further work with an optical recognition device to constitute a length measurement system that the optical recognition is applied to.

Abstract: An optical recognition pattern for length measurement is mounted on an optical contact surface and includes a plurality of optical recognition units, each of which corresponds to a length value. The sequence of the optical recognition units on the optical contact surface is consistent with that of the corresponding length values in such a way that the optical recognition pattern imitating the conventional measuring ruler can be constituted. Besides, the optical recognition pattern can further work with an optical recognition device to constitute a length measurement system that the optical recognition is applied to.

Abstract: A body composition measuring apparatus using a bioelectric impedance analysis and a neural network algorithm for obtaining two or more anthropometry variables from testees and then inputting the anthropometry variables into the internal processing unit that has a built-in back propagation-artificial neural network that has one input layer, 1-10 hidden layers each having 1-15 hidden neurons and one output layer having one output neuron. By means of the aforesaid artificial neural network, the invention accurately predict the fat free mass of the testee so as to further obtain the amount of body fat, showing higher accuracy than conventional linear regression equation (LRE).

Abstract: A body warm-keeping apparatus for keeping the core temperature of a human body during an X-ray examination is disclosed to include an apparatus body providing a platform for supporting an object to receive an X-ray examination, a heater device or a number of heater devices that allow penetration of X-rays therethrough and are arranged at the platform for the contact of the object to keep the object warm, one or a number of accommodation compartments disposed at one side relative to the platform, said platform defining a radiation region corresponding to an X-ray radiation path, said at least one accommodation compartment being disposed in said X-ray radiation path, said at least one accommodation compartment being adapted for accommodating a photographic receptor adapted for producing a shadow image of the internal structure of a part of the object being X-rayed. The space-saving arrangement of the heater device(s) facilitates design and fabrication of the body warm-keeping apparatus.