摘要:
Techniques for determining authenticity of analog forms such as packaging or documents (117). One of the techniques determines whether the analog form has been made directly from a digital representation (903) or by photocopying or scanning an analog form. The technique makes the determination by comparing (911) an original digital representation of a portion of the analog form with a digital recording (203) of the portion from the analog form and measuring differences in features that are affected by the operations of photocopying or scanning. The original digital representation (105) and the analog form may have a “noisy”, i.e., random or pseudo random pattern. Such noisy patterns may further be used for other authentication purposes, such as determining whether the portion of the analog form that has the noisy pattern has been altered and to carry hidden messages. The noisy pattern may carry a logo or may be. part or all of a barcode.
摘要:
A method and system for watermarking video images including generating a payload, selecting sets of coefficients, modifying coefficients and embedding said watermark by enforcing relationships between property values of selected sets of coefficients with a volume of video are described. The modified coefficients replace the selected sets of coefficients.
摘要:
A lens driving device has a stationary part including an iron shell, a movable part including a lens holder for holding a lens therein, and a driving part for moving the movable part relative to the stationary part. The driving part includes a plurality of magnets fixed to the iron shell, and at least one coil fixed to the lens holder. The magnets are divided into at least two layers stacked in the direction of the optical axis of the lens and a plurality of groups along the circumferential direction of the lens. Each magnet is polarized in the radial direction of the lens. The polarities of two adjacent stacked magnetic poles in the same group are opposite to each other so as to cooperatively form a magnetic circuit in a plane parallel to the optical axis direction. The coil includes an axis about which the coil is wound. The coil axis is perpendicular to the optical axis. The coil has an upper part facing one layer of magnets and a lower part facing the other layer of magnets.
摘要:
The present invention discloses methods of making a mixture of theaflavin, theaflavin-3-gallate, theaflavin-3′-gallate and theaflavin 3,3′-digallate, pharmaceutical compositions of the above mixture of theaflavins, diet supplement compositions of the above mixture of theaflavins and methods for using the above mixtures of theaflavin and pharmaceutical compositions thereof to treat or prevent various diseases. The present invention also discloses methods of making theaflavin, theaflavin-3-gallate, theaflavin-3′-gallate and theaflavin 3,3′-digallate, each as a separate compound, pharmaceutical compositions of the above compounds, diet supplement compositions of the above compounds and methods for using the above compounds to treat or prevent various diseases.
摘要:
The present invention prevents the occurrence of damage on a small diameter portion 4a which is formed on a rear end portion of a ceramic heater fixed in a metallic outer sleeve 8. The ceramic heater 4 is fixed in the metallic outer sleeve 8 by blazing or the like in a state that a heat generating portion formed on a distal end thereof is exposed to the outside. The rear end portion of the ceramic heater 4 is positioned inside the metallic outer sleeve 8, and the small diameter portion 4b is formed on the rear end. The rear-end small diameter portion 4b of the ceramic heater 4 is connected to an electrode lead-out member (electrode lead-out wire 10) for taking out a positive electrode of a heat generating material. Granulated powder (alumina, for example) 18 made of inorganic insulating material is filled in around a connecting portion of the ceramic heater 4 in the metallic outer tube 8 and the electrode lead-out-wire 10, and in addition, magnesia 20 is sealed outside the granulated powder. Thereafter, swaging is performed to bring the magnesia 20 into a highly dense state thus fixing the electrode lead-out wire 10 and an electrode lead-out rod 12 in the metallic outer sleeve 8.
摘要:
A lamination 10 for the stator of a universal motor has two poles 12 and a flux return path in the form of a ring 14 joining the two poles together. Each pole 12 has a pole face 16 defining there between a rotor space 20 for accommodating a rotor and each pole 12 has a neck portion 18 for receiving stator field windings. The width A of the ring 14, the length B of the pole 12, the radial distance C between the pole faces 16 and the width D of the neck portion 18 are selected according to formulae to achieve improved power output and output torque.
摘要:
The present invention discloses methods of making a mixture of theaflavin, theaflavin-3-gallate, theaflavin-3′-gallate and theaflavin 3,3′-digallate, pharmaceutical compositions of the above mixture of theaflavins, diet supplement compositions of the above mixture of theaflavins and methods for using the above mixtures of theaflavin and pharmaceutical compositions thereof to treat or prevent various diseases. The present invention also discloses methods of making theaflavin, theaflavin-3-gallate, theaflavin-3′-gallate and theaflavin 3,3′-digallate, each as a separate compound, pharmaceutical compositions of the above compounds, diet supplement compositions of the above compounds and methods for using the above compounds to treat or prevent various diseases.