566results about How to "Short recovery time" patented technology

An instrument in particular suitable for being inserted into the cavity within a vertebra, which instrument features a collapsed position and an expanded position, in which collapsed position the instrument can be inserted into the cavity through an opening in the vertebral wall. The instrument includes a first upper elongated contact element and a second lower elongated contact element, and member for moving said elements apart in a direction substantially transversely to their contact surfaces to a particular end position, in which the elements are locked in position relative to each other.

An electrochemical sensor system and membrane and method thereof for increased accuracy and effective life of electrochemical and enzyme sensors.

A blood vessel occlusion system and method includes a handheld probe including a power source, the probe being adapted to transmit energy from the power source through a body surface and into a target blood vessel, for example a varicose vein. Further included is a manual or automatic switch mechanism adapted to enable and disable the power source in response to a predetermined level of compression applied, by means of the probe against the target blood vessel. When the blood vessel is compressed sufficiently to collapse and substantially slow or substantially prevent a flow of blood therethrough, the power source is activated and the vessel is cauterized, leaving the blood vessel in a condition that is resistant to recanalization.

A retractor for use in surgical operations comprises a pair of blade assemblies which are adapted to open about a set of axes that are not parallel to a third spatial axis. The retractor further comprises a pair of arms, which are adapted to move the pair of blade assemblies apart from one another in the third spatial axis. In operation, the blade assemblies are closed to assume a low profile, inserted into a relatively small incision, and stretched apart from each other, thereby stretching the skin about the incision to form an aperture longer than the incision. The blade assemblies are then opened by rotating the blades about the set of axes, thereby stretching the skin around the incision in a second direction that is substantially perpendicular to the first direction (i.e. the direction of the incision.) The retractor thus forms an aperture for passage of surgical instruments and viewing of the surgical field by surgical personnel. In some embodiments, the retractor features a pair of removable handles that may be removed from the arms during surgery in order to afford the surgeon improved space management about the incision. In specific embodiments, the invention provides a method of performing an operation, e.g. a spinal operation, on a patient using the disclosed retractor.

A composition of probiotics, vitamins and minerals, electrolytes with glutamine and glucose along with medium chain triglycerides are provided as a supplement to animals. This is administered to cattle, calves, sheep, pigs, horses, dogs, and cats that are experiencing stress and or are undergoing medical drug therapy to treat conditions of diseases along with pre and post operative surgical conditions. The composition helps correct imbalances in beneficial bacteria, provides energy and helps in rehydration to reduce recovery time from stress or in disease treatment in these animals.

The invention discloses a medium-length hole mining method in multiple blasting free faces of high dipping thin veins. The medium-length hole mining method is characterized by comprising the steps of: arranging ore blocks along the trend of a core body, dividing the ore body into a medium section and a segment in the altitude; drilling a gate way in the segment and arranging in veins along the ore body; arranging a flat ore removal structure on the bottom along the veins; arranging a cutting raise from one ends of the ore blocks, arranging a manway at the other ends of the ore blocks; and upwards and downwards punching forwards leaning medium-length holes, with the cutting raise as free faces, and blasting caved ores in the segment by multiple free faces, and withdrawing the ore centrally at the bottom. The medium-length hole mining method has the remarkable characteristics of high mining safety, little resource dilution rate, good production continuity, high level of mechanization, low cost, high efficiency, low labor intensity and the like.

The invention discloses a rib-pillar-free continuous sublevel filling method for mining preparation in a medium-thickness slope crushed ore body vein. The method comprises the following steps of: dividing a mine block into panel structures with a plurality of sections and bunches, namely dividing sections in a panel, not leaving a rib pillar in the sections, and dividing continuous extraction units; arranging a slope ramp of the panel on an ore body hanging wall, and arranging sectional roadways namely rock drilling ore removal gate ways in the vein; making all the sectional roadways in the panel mutually communicated, and the allocation and transportation of trackless equipment flexible and convenient; performing quarry central up cutting before the extraction, and ensuring the deep hole construction in a quarry upward sector in good conditions; performing operation such as multiple-section quarry rock drilling, blasting, supporting, ore removing, filling and paralleling; using a rib-pillar-free continuous extraction way backing from two wings of the panel to the center in the same sectional quarry, wherein an extraction process is performed sequentially; and filling a gob with tailings or waste stones. The invention relates to the rib-pillar-free continuous sublevel filling method suitable for medium-thickness slope crushed ore bodies, which has a low mining preparation ratio, low loss and high efficiency and the extraction is safe.

The invention discloses a method for reducing vanadium-titanium magnetite powder by coal reducing gas and fluidized beds. High temperature coal gas produced by a coal reducing gas system is mixed with gas of a reducing exhaust gas purification system to form reducing gas, and the reducing gas enters third-stage, second-stage and first-stage reduction fluidized beds in turn; the preheated vanadium-titanium magnetite powder enters the first-stage, second-stage and third-stage reduction fluidized beds in turn and is fluidized and subjected to reduction reaction under the action of the reversely upward reducing gas; and the obtained directly reduced iron is briquetted, titanium slag is removed, vanadium slag is extracted, and the qualified molten steel is produced. The invention integrates process modules such as coal reducing gas, iron ore powder preheating, fluidized bed reducing, briquetting, electric furnace melting separation and the like, and has the advantages of high production thermal efficiency, low cost of preparing the reducing gas, short time of reducing the iron ore powder and the like.

The invention belongs to the technical field of semiconductor oxide gas sensors, and particularly relates to a gas sensor based on graded porous WO3 microspheres and a preparation method thereof. A gas-sensitive coating in the gas sensor based on the graded porous WO3 microspheres is prepared from the graded porous WO3 microspheres, the graded porous WO3 microspheres have single hexagonal-phase crystal structures and are uniform in body size and good in individual dispersity, the diameter of the graded porous WO3 microspheres is 3-5 micrometers, and each graded porous WO3 microsphere is formed by assembling WO3 nanorods with the diameter being at the nanoscale and has a large specific surface area and high porosity. According to the preparation method, hydro-thermal synthesis is performed in the presence of a mixing assistant, and the graded porous WO3 microspheres are obtained and assembled to form the finished product. The gas sensor based on the graded porous WO3 microspheres has the advantages of being low in working temperature, high in sensitivity, low in energy consumption, high in selectivity and the like.

The invention provides a device and a method for treating refractory iron ore, which have high iron resource recovery rate and are capable of directly reducing the refractory iron ore. The device for treating the refractory iron ore provided by the invention comprises a regenerative rotary hearth furnace, wherein the regenerative rotary hearth furnace comprises a furnace chamber enclosed by an annular inner wall, an annular outer wall and a furnace bottom; the furnace bottom can rotate; the furnace chamber is divided into a feeding area, a pre-heating area, a heating area, a high-temperature area, a control area and a discharge area; and a feeding hole is arranged on the annular outer wall of the feeding area, and a discharge hole is arranged on the annular outer wall of the discharge area. According to the device and the method for treating the refractory iron ore provided by the invention, the rotary hearth furnace adopts a regenerative combustion technology, and therefore, the time of pellets in the pre-heating area of the rotary hearth furnace is shortened, the time of the pellets in a reducing area is indirectly increased and metallization ratio of directly reduced iron is improved.

The invention discloses a tension roll control device for a plate and strip processing line and a tension control method, belonging to the field of tension control of tension rolls on the plate and strip processing line in the metallurgical industry. The tension roll control device comprises a tension roll group, an auxiliary roll frequency converter and a main roll frequency converter, and further comprises an auxiliary roll speed encoder, a main roll speed encoder, a load distributor, a tension regulator, a feedforward compensation unit and a tensiometer, wherein two ends of the load distributor are respectively connected with the auxiliary roll frequency converter and the main roll frequency converter; the auxiliary roll frequency converter comprises an auxiliary roll rotation speed control unit and an auxiliary roll torque control unit; and the main roll frequency converter comprises a main roll rotation speed control unit and a main roll torque control unit. The tension roll control device has the advantages of high control response speed and high control precision. A control method of the tension roll control device comprises the steps of: (1) main/slave load distribution for the tension rolls; (2) complex tension control of the tension rolls; and (C) dynamic compensation. The method has the advantages of small steady state error of a torque loop, short anti-disturbance recover time, constant rotation speed and good anti-disturbance performance.

The invention relates to a precious metal/base metal oxide/graphene ternary composite gas sensitive material and a preparation method thereof. The preparation of the precious metal/base metal oxide/graphene ternary composite gas sensitive material is realized by a series of processes; the composition material is combined with excellent properties of various components; by using the composition material, the gas sensitive property of a sensor is further improved while the defects of low sensitivity, poor selectivity, high resistance and the like of a conventional metal oxide sensitive material are overcome; a gas sensitive sensor prepared from the ternary composite material is used for detecting acetone gas; compared with a sensor prepared from a metal oxide/graphene composite material and a metal oxide/precious metal semiconducting material as gas sensitive materials, the gas sensitive sensor prepared from the ternary composite material has the advantages of higher sensitivity, quicker response, shorter recovery time and higher selectivity and broader application prospect.

The invention discloses a method for rapid self-healing of a power grid. The method comprises the following steps of: obtaining operation data of all machine units in the power grid, and establishing mathematic models of all the machine units; determining a starting sequence of non-started machine units and searching for power supply routes from started machine units to the non-started machine units according to the mathematic models; calculating capacities and schedulable loads of the started machine units by using an optimal trend algorithm; and starting the non-started machine units in sequence according to the starting sequence, the power supply routes, and the capacities and the schedulable loads of a generator unit. Correspondingly, the invention further provides a system for the rapid self-healing of the power grid. According to the method and the system, the rapid self-healing of the power grid is realized by considering a plurality of machine units with black-start functions, and the steady trend constraint and the machine unit operation constraint are met.

A power supply system is structured, which has a server disposed so that it is capable of communicating through redundant communication media with a user terminal at a user site which is capable of receiving power from one power supply system selected by making a switchover among a plurality of power supply systems; the server collects information about abnormalities caused in the plurality of power supply systems through other redundant communication media from abnormality detectors disposed in a plurality of power generating plants, each of which is part of one of the plurality of power supply systems, and on a plurality of electric transmission/distribution lines, each of which is also part of one of the plurality of power supply systems; the server determines whether the power supply system from which the user is currently receiving power is normal or abnormal; if the power supply system is abnormal, the server sends, to the user terminal, information about normal power supply systems from which the user is able to receive power.

A laser device is described for skin ablation treatment. The device comprises a laser source (5) and a handpiece (9). The laser beam has a Gaussian distribution of the power density to obtain different effects in the various regions exposed to the laser beam.