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52results about How to "Maximize advantage" patented technology

Method for over-pit and under-pit cooperative control of roofs of far and near fields of an extra-large stoping space

The invention relates to a control method for a hard roof of a coal mine, specifically to a method for over-pit and under-pit cooperative control of roofs of far and near fields of an extra-large stoping space. The method provided by the invention overcomes the problem of lack of comprehensive and cooperative control methods for hard roofs of far and near fields of an extra-large stoping space in the prior art. According to a technical scheme in the invention, the method comprises an over-pit vertical hole hydraulic fracturing method, an over-pit L-shaped hole hydraulic fracturing method, an over-pit highly-energy-gathered repetition pulse strong shock wave method, an under-pit water injection method, an under-pit layered blasting method and an under-pit hydraulic fracturing method. The method has the advantages that 1) the problem of great mine pressure of the extra-large stoping space is effectively controlled through over-pit and under-pit cooperative control of the hard roofs of far and near fields; 2) advantages of the variety of methods are given to full play and disadvantages of the variety of methods are mutually compensated, so weakening effect on the hard roofs is substantially improved; and 3) all the over-pit and under-pit holes can be used independently or be used in a shared way, so time, manpower, material resources and money used for hole perforation can be greatly reduced.
Owner:DATONG COAL MINE GRP

Logarithmic light intensifier for use with photoreceptor-based implanted retinal prosthetics and those prosthetics

InactiveUS20070016294A1Maximize electrical stimulationAvoid damageElectrotherapyEye surgeryRetinal ProsthesisPattern perception
This invention is for directly modulating a beam of photons onto the retinas of patients who have extreme vision impairment or blindness. Its purpose is to supply enough imaging energy to retinal prosthetics implanted in the eye which operate essentially by having light (external to the eye) activating photoreceptors, or photoelectrical material. The invention provides sufficient light amplification and does it logarithmically. While it has sufficient output light power, the output light level still remains at a safe level. Most preferred embodiments of this invention provide balanced biphasic stimulation with no net charge injection into the eye. Both optical and electronic magnification for the image, as for example, using an optical zoom lens, is incorporated. Otherwise, it would not be feasible to zoom in on items of particular interest or necessity. Without proper adjustment, improper threshold amplitudes would obtain, as well as uncomfortable maximum thresholds. Therefore, to adjust for these, a way of proper adjustment for the threshold amplitudes and maximum comfortable thresholds is provided. Furthermore, to the extent that the individual stimulation sites in the retina give different color perceptions, upon stimulation, then colors of the viewed scene is correlated with specific stimulation sites to provide a certain amount of color vision.
Owner:SECOND SIGHT MEDICAL PRODS

Control device for internal combustion engine

Provided is a control device for an internal combustion engine, which can enable stable and fine control of an average air / fuel ratio of an exhaust gas on the upstream side of a catalyst. The control device for an internal combustion engine includes: a catalytic converter; an upstream O2 sensor to the upstream of the catalyst; a downstream O2 sensor to the downstream of the catalyst; a first air / fuel ratio feedback control unit for controlling the air / fuel ratio of the exhaust gas based on an output value of the upstream O2 sensor and a controlling constant group; a second air / fuel ratio feedback control unit for calculating a target average air / fuel ratio AFAVEobj based on the output value of the upstream O2 sensor and an output target value VR2; and a conversion unit for calculating at least two controlling constants by using the target average air / fuel ratio AFAVEobj as a common index.
Owner:MITSUBISHI ELECTRIC CORP
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