摘要:
An apparatus for negative stiffness including one or more solenoids for generating a magnetic field. A moveable magnet is moveable relative to the one or more solenoids through the one or more solenoids. The one or more solenoids are configurable to generate an at least substantially quadratic magnetic field about an equilibrium position at which the resultant force on the moveable magnet is zero. Depending on the respective pole orientation, generating a quadratic magnetic field about an equilibrium position provides a substantially linear negative stiffness characteristic with displacement.
摘要:
A resistance-voltage (R-V) transformation system used in dynamic strain measurement for a structure is provided. The system has single-channel (SC) circuit units each for producing a voltage corresponding to a resistance of a sensing element of a structural-strain sensing network. Each SC circuit unit has a R-V transformation module for converting the resistance into the voltage, a band-pass filter module for filtering the R-V transformation module output after a direct-current bias therein is removed, and a high-gain amplification module for amplifying the filter output. The band-pass filter module is configured such that an unwanted low-frequency component induced by resistance drift of the sensing element is removed while allowing a guided-wave signal component to pass through. Particularly advantageous for the sensing network using nanocomposite sensing elements, the R-V transformation system is useful for a wide range of sensor resistance values, mitigating adverse effects of resistance drift, and enabling simplicity in wiring.
摘要:
An electric motor comprising a stator and a rotor. The stator has at least one resonant circuit and the rotor has at least one resonant circuit rotatable with the rotor relative to at least one stator resonant circuit such that at least one rotor resonant circuit is angularly displaceable relative to at least one stator resonant circuit. At least one stator resonant circuit and at least one rotor resonant circuit are configured to have at least substantially the same self-resonant frequency. The electric motor uses magnetic resonant coupling between one or more stator resonant circuits and one or more rotor resonant circuits to produce usable torque.
摘要:
The present invention discloses a contactless 3D biometric feature identification system and the method thereof. The system comprises of a fixed-viewpoint image capturing means, a lighting module capable of producing different illuminations on the object of interest and a microprocessor configured to execute a biometric identification algorithm. The algorithm starts with capturing a plurality of images with different illuminations. The captured images are then utilized to reconstruct a three dimensional surface model. Different features, for instance 2D and 3D coordinates and orientations of the biometric feature, surface curvature of the object and the local surface orientation of the object, are extracted from the captured images and the reconstructed 3D surface model. Different matching scores are also developed based on the aforesaid features to establish the identity of the biometric features.
摘要:
A posture correction girdle comprises a body wrapping shell, a plurality of pockets and a plurality of paddings is disclosed. The paddings are configured to be inserted into pockets at predetermined positions. Thereby, when the posture correction girdle is worn by the user, pressure is exerted onto a corresponding predetermined section of the user's spine for posture correction purpose. The posture correction girdle further comprises a pair of elastic shoulder straps, an elastic waist strap and a plurality of elongated bones to provide additional support to the user's spine. A micro-system comprising a processor, an output device and a plurality of sensors can also be embedded into the posture correction girdle to provide information regarding the efficiency of the posture correction girdle and the progression of the treatment. Such information is provided to the users using the output device.
摘要:
The present invention relates to a system for product storage and methods of categorizing, storing, and delivering products to end users via the system, the system's components including a processor, a “smart shelving” device, boxes for insertion into and utilization by the “smart shelving” device, and ID readers. Through the present invention, products are able to be securely and more certainly delivered to the proper recipient of the products.
摘要:
The preparation of Pleurotus tuber-regium polysaccharide functionalized nano-selenium hydrosol with anti-tumor activity includes the following steps: 1) at normal temperature and under normal pressure, adding a Vitamin C solution to an aqueous solution of Pleurotus tuber-regium polysaccharides, and mixing uniformly; 2) adding dropwise a selenium dioxide solution or a selenite solution to the solution while mixing uniformly; and 3) adding water to the solution to a pre-determined volume, to obtain a Pleurotus tuber-regium polysaccharide functionalized nano-selenium hydrosol when the red color of the product is no longer deepened. The polysaccharides are used to control the particle size of nano-selenium, to obtain functionalized nano-elemental selenium with high anti-tumor activity and low toxicity. The anti-tumor activity of the biologically active molecule polysaccharides and the physiological effect of nano-selenium are combined, and a synergistic anti-tumor effect is achieved.
摘要:
A system using a three-coil topology for wireless power transfer is disclosed. The system comprises a primary resonator coupled to a power source, a repeater resonator and a receiver resonator. The primary resonator has a primary coil, and the repeater resonator has a repeater coil adjacent to the primary coil. The repeater coil and the primary coil are separated by a distance selected, and the repeater coil is configured, to amplify a primary-coil current by inductively generating a repeater-coil current that is substantially greater than the primary-coil current. A magnetic field contributed from both the primary-coil current and the repeater-coil current is generated while the power source needs not provide a terminal voltage across the repeater coil, thereby discouraging occurrence of voltage stress at the power source. The receiver resonator has a receiver coil, which receives the magnetic field to inductively generate a receiver-coil current for feeding to a load.
摘要:
A method of 3D biometrics identification includes the steps of acquiring 3D image(s) of fingerprint; performing image normalization and feature extraction steps involving, noise elimination, ridge extraction, ridge modification and ridge validation; extracting 3D fingerprint minutiae and performing the reliability evaluation of the extracted 3D fingerprint minutiae; automatically extracting of 3D fingerprint template comprising at least five features; and automatically registering two 3D fingerprint templates, say P and Q, by computing relative 3D minutiae representation from a 3D minutiae in P (sample) considered as the origin and aligning every 3D minutiae in Q to compute best possible matching score, wherein every 3D minutiae in template P is further considered as the origin for the alignment of 3D minutiae in template Q, and the best possible matching score obtained from such considerations (candidate alignments) is considered as the final matching score between two 3D fingerprint templates.
摘要:
A posture correction girdle comprises a body wrapping shell, a plurality of pockets and a plurality of paddings is disclosed. The paddings are configured to be inserted into pockets at predetermined positions. Thereby, when the posture correction girdle is worn by the user, pressure is exerted onto a corresponding predetermined section of the user's spine for posture correction purpose. The posture correction girdle further comprises a pair of elastic shoulder straps, an elastic waist strap and a plurality of elongated bones to provide additional support to the user's spine. A micro-system comprising a processor, an output device and a plurality of sensors can also be embedded into the posture correction girdle to provide information regarding the efficiency of the posture correction girdle and the progression of the treatment. Such information is provided to the users using the output device.