1903 results about "Heat effect" patented technology

A cage and sleeve assembly for an embolic filtering device used to filter embolic particles from a body vessel has a strut assembly that is movable between an unexpanded position and an expanded position. Struts having strut ends at the respective ends form a cage. The strut ends are initially made from linear elastic nitinol, and a series of spot or laser or other types of welds then secure the strut ends in the sleeve assembly. In one approach, the ends of the strut ends are welded to form a tube. In another approach, the strut ends are welded onto a sleeve. The strut ends may optionally have ends that are partial cylinders, and the partial cylinders are welded onto a cylindrical sleeve. Effects from the welding, such as changing linear elastic nitinol to superelastic nitinol, are contained within a heat-effected zone, and do not extend into areas of the structure that typically bend during use.

A laser-assisted method for fully or partially separating tissue such as collagen-containing tissue is provided. In one embodiment, the method pertains to a capsolurorhexis whereby the laser-assisted method is applied to the lens capsule. A light-absorbing agent is added into or onto the tissue. A light beam with a wavelength capable of being absorbed by the light absorbing agent is then directed at the tissue to cause a thermal effect at the tissue following a predetermined closed curve with the goal to avoid irregularity or potential tears in the resulting rim of the tissue.

A complete bleaching unit is made up of an electrochemical system, finding its application in particular in the dental and medical fields, allowing, thanks to the creation of an electrophoretic field, a strong, fast penetration and directing the bleaching agents, their removal under the same conditions together with the molecules responsible for coloration and an effective and controlled penetration of the stabilizing agents for the apatite crystal, basic component of the tooth, such as fluorine. Also thanks to its light-based optical system, the invention provides that the activation of the photosensitive bleaching products by decreasing the heat effect while increasing the photonic effect thanks to a selection of wavelength in the range of 400-500 nm and, finally, thanks to an electro-optical unit, the control of the evolution of coloration by objective spectrocolorimetry-based methods.

The present invention provides a method of laser processing of materials, specifically laser induced ablation processes for laser removal of material particularly important in medical and dental applications in which the laser removal of material should be done in such a way as to not damage any of the surrounding soft or hard biomaterial. The ablation process is achieved by impulsive heat deposition (IHD) by direct and specific excitation of short lived vibrations or phonons of the material in such a way as to not generate highly reactive and damaging ions through multiphoton absorption. The heat deposition and ensuing ablation process under prescribed time and wavelength conditions for laser irradiation is achieved faster than heat transfer to surrounding tissue by either acoustic or thermal expansion or thermal diffusion that otherwise would lead to excess heat related damage. The result is that all the deposited laser energy is optimally channelled into the ablation process in which the inertially confined stresses from both photomechanical expansion forces and thermally driven phase transitions and associated volume changes constructively interfere to drive the most efficient ablation process possible with minimal damage to surrounding areas by either ionizing radiation or heat effects. By choosing a specific range of wavelengths, spatial and temporal shaping of infrared laser pulses, the energy can be optimally deposited in a manner that further increases the efficiency of the ablation process with respect to minimizing collateral damage.

The invention provides an application method of cold field plasma discharge assisted high energy ball milled powder and a plasma assisted high energy ball milling device using the cold field plasma discharge assisted high energy ball milling method. The method comprises the following steps: utilizing dielectric barrier discharge to generate plasmas, introducing a dielectric barrier discharge electrode bar into a high-speed vibrating ball-milling tank, on one hand, requiring a solid insulating medium on the outer layer of the electrode bar to simultaneously bear high-voltage discharge and mechanical shock failure of the grinding ball, and on the other hand, requiring the high-speed vibrating ball milling device to uniformly process the powder. The method is based on the ordinary ball milling technology; the processing efficiency and the effect of the ball mill can be greatly improved by the following steps: under a non-heat-balance discharge condition of the pressure that the discharge space pressure is set to be about 102-106 Pa, introducing the discharge plasmas to input another effective energy to the processed powder, promoting the powder to be processed to be subjected to combined action of the mechanical stress effect and the heat effect of the external electric field, and further accelerating refining of the powder and promoting the alloying progress.

The invention relates to a machining device and a machining method for enhancing a sapphire laser back wet etching rate. The machining device comprises a protection device, a laser beam, a lens assembly, a container and a limit layer, operating fluid is filled in a hollow cavity formed in the container, a workpiece is placed on the surface of the operating fluid and contacts with the operating fluid, the protection device is mounted at the top of the workpiece, the limit layer is mounted below the workpiece, and the laser beam irradiates the back of the workpiece through the lens assembly. The machining device has a high material removing rate under the condition of ensuring fine surface machining quality of sapphires. According to the machining method, chippings are easily taken away by the fluid, the heat effect of laser ablation is small, a regelation layer in a machining area is omitted, machining quality is fine, a laser-induced cavitation effect leads to a micro-jet enhancement effect, the laser etching rate of transparent materials such as the sapphires is enhanced, and micro-structures and shape cutting of material surfaces can be realized. The machining method is simple to operate, convenient, practical and high in machining speed.

The invention discloses a method for simulating offshore oilfield micro fracturing injection increase crack propagation on the basis of fluid-solid-heat coupling theory. The method comprises the following steps that geological characteristic parameters are obtained on the basis of offshore micro fracturing well geological data; a hydraulic crack propagation model is built, and fluid pressure and filter loss in a crack are obtained; on the basis of a reservoir matrix model, dynamically changing pore pressure in a reservoir is worked out; on the basis of elastic mechanics and permeation fluid mechanics, a pore elastic deformation relation between fluid and rock is built, that is to say, a fluid-solid coupling model is built, and by means of the calculated pore pressure, rock strain caused bythe fluid can be obtained; a heat effect relation between the temperature and the rock is built, a strain, porosity, permeability and temperature fluid-solid-heat coupling model is built, the permeability and porosity after coupling change are obtained, the pore pressure after three-field coupling change is obtained, the changed pore pressure reacts on a Darcy filtration model, and the crack extension dynamic of the next moment is obtained. According to construction and geological parameters, the dynamic extension situation of the hydraulic crack and real-time change situation of the reservoir parameters in the offshore micro fracturing well long-term injection increase process can be predicted according to the construction and geological parameters.

The invention discloses a method and a device for preparing a crack-free cladding layer through ultrasonic vibration-assisted laser cladding. Ultrasonic vibration aging is directly introduced into a molten pool micro-area, a direct cavitation effect, a mechanical effect and a heat effect of an ultrasonic wave are utilized for promoting the uniformity of a cladding layer stress field and the refining of grain tissues, and the generation of cracks is inhibited from the root; the ultrasonic wave can be directly acted on a molten pool, a promoting effect on temperature and stress distribution uniformity is higher than an overall vibration effect of a workpiece far away from the molten pool, and the three effects of the ultrasonic wave have a better stirring effect than that of an electromagnetic stirring elimination method, so that the new method has essential difference relative to previous methods, and has better superiority. By repeated experiments, an effect of refining the grain tissues can be achieved so as to prepare the crack-free cladding layer with a favorable surface appearance.

The invention relates to a method for machining micro holes in a ceramic matrix composite through femtosecond lasers. According to the method, the silicon carbide ceramic matrix composite sample is placed on a working table and machined layer by layer in a spiral line mode through the femtosecond lasers or machined in a linear scanning mode, wherein the thickness of the sample is smaller than 3 mm; in the micro-machining process, the wave length of femtosecond laser machining ranges from 400 nm-1500 nm, the pulse width ranges from 80 fs to 500 fs, the output power of the lasers is determined according to the requirements of micro-machining and ranges from 20 mW to 20 W, and the repetition frequency of the lasers is determined according to the requirements of micro-machining and ranges from 50 K to 25 MHz; the sample is machined in a layer-by-layer removal mode, wherein the rotation speed of a machining head is 2400 rev/s. In the machining process, the method has the advantages that machining damage is small, and because material around the damage region is still in a cold state after machining, the heat effect is small; machining precision is high, energy of the femtosecond lasers is in Gaussian distribution, absorption and action of the energy in the machining process are limited within the size of which the focus center is quite small, and the machining dimension is expressed from a micro form to a sub-micro form.

The two-stage metal hydride automobile air conditioner refrigerates via the heat effect of reversible reaction between metal hydride and hydrogen. Waste heat of tail gas as high temperature heat source and peripheral atmosphere as medium temperature heat source are utilized to drive the refrigerating circulation of metal hydride, and two pairs of metal hydride reactors are adopted for alternate refrigeration to continuous regulation of temperature inside the automobile. The air conditioner system includes mainly high and low temperature metal hydride reactors, heat exchanger, solenoid valve, water pump, blower, etc. Inside both the high temperature and the low temperature reactors, are arranged fine pipes with filled metal hydride and hydrogen penetrating film in the middle section of pipes and hydrogen collecting general pipe. The air conditioner has no corrosion, no wear, less motion parts, high vibration resistance, no damage to atmosphere ozone layer and other advantages.

The invention discloses an embedded control system for computers and an updating method of the embedded control system and relates to the field of information safety. An EC (embedded controller) is independent from a tablet computer CPU (central processing unit) and generally used for controlling equipment starting time sequence and controlling power switches of various devices and can realize system power management, component power management, CPU power management, component and CPU power effect management, battery management and heat effect management and the like. In order to simplify design and save cost, existing tablet computers directly update hardware of the EC through upper software, but upgrading operation is not subject to validity inspection and upgrading data are not subject to credible inspection in most EC upgrading processes, so incorrect or illegal EC hardware upgrading can change functions of the EC and threatens safety of the tablet computers. After modification, a safe and credible operation method for updating hardware of the embedded controller is implemented in the hardware environment of the embedded controller updating system, and safety and reliability of the hardware of the embedded controller are guaranteed.

The invention relates to a light source system and application thereof. The light source system comprises a laser, an interference filter, a first condenser lens, a light conversion device, a reflector, a second condenser lens, a dodging member, a radiating member and an actuator. The light conversion device comprises a transparent substrate, a wavelength conversion layer and a filter layer; the transparent substrate is rotatable; the filter layer is laminated on the transparent substrate and the filter layer is set around the edge of the transparent substrate for a round to form an annular structure; the wavelength conversion layer is laminated on the transparent substrate and the wavelength conversion layer is set in the middle of the transparent substrate; the radiating member is fixedly connected with the transparent substrate at the side far from the wavelength conversion layer; the actuator and the radiating member are fixedly connected; and the actuator can drive the transparent substrate to rotate through the radiating member. The projection system has the advantages of good heat radiation performance, therefore, the heat effect of the light conversion device in the fluorescence transition process can be improved, and the brightness of the light source system can be raised.

The invention discloses a flexible stretch-forming device and a method for carrying out stretch-forming on a plate by utilizing the flexible stretch-forming device and solves the technical problem that the stretch-forming accuracy of a flexible stretch-forming device for the molded surface of a reconfigurable unidirectional continuous die is low. The technical scheme includes that the flexible stretch-forming device comprises an industrial manipulator, a heating forming head, a power supply, a multipoint die, a nail post and a polyurethane elastic cushion. The nail post is mounted on the base of the multipoint die, the polyurethane elastic cushion is positioned above the nail post, the lower surface of the polyurethane elastic cushion is attached to the discrete surface formed by the nail head of the nail post, the plate is positioned above the polyurethane elastic cushion, the lower surface of the plate is attached to the upper surface of the polyurethane elastic cushion, the heating forming head is positioned above the plate, and the spherical head surface of the heating forming head is contacted with the upper surface of the plate. According to the flexible stretch-forming device and the method for carrying out stretch-forming on the plate by utilizing the flexible stretch-forming device, the electromagnetic induction heating forming head is adopted to locally heat the plate in the stretch-forming process, the local heat effect of the region can reduce the deformation resistance of the plate, the plasticity is improved, the resilience value is reduced, and the forming accuracy of the plate is improved.

The invention relates to a metal-phase carrier loaded catalyst as well as a preparation method and application of catalyst in preparation of methane and methane synthesized gas reaction by catalyzing carbon oxide or (and) carbon dioxide. The metal-phase carrier loaded catalyst comprises active component metal oxide which is loaded on a metal-phase carrier and auxiliary metal oxide, the general formula of the metal-phase carrier loaded catalyst is as follows: xM1O-yM2O/ZT, wherein M1O represents the active component metal oxide, M2O represents the auxiliary metal oxide, ZT represents the metal-phase carrier, x represents the mass percent of the active component metal oxide in the catalyst, and y represents the mass percent of the auxiliary metal oxide in the catalyst. The catalyst has the advantages of high activity, high stability, excellent heat conduction property, high permeability, convenience in use, long service life, simplicity in preparation and the like, the heat effect difficulty in strong heat discharging/suction reaction in the chemical industry field can be effectively solved, and the catalyst can be used in the methanation process and the methane-producing synthesized gas reaction.

A circuit board structure having an embedded semiconductor chip and a method for fabricating the same are disclosed. The circuit board structure includes: a carrier board formed with at least one through hole; a semiconductor chip received in the through hole of the carrier board, the semiconductor chip having an active surface and a non-active surface, wherein the active surface is provided with a plurality of electrode pads; a dielectric layer formed on surfaces of the carrier board and the semiconductor chip and formed with a plurality of openings for exposing the electrode pads of the semiconductor chip; and a composite circuit layer formed on the dielectric layer, including a thinned metal layer, conductive layer, and electroplated metal layer, and electrically connected to the electrode pads by conductive structures formed in the openings of the dielectric layer. Strong bonding provided by the composite circuit layer formed on the dielectric layer thus desirably reduces the warpage problem resulted from thermal effect.

The invention relates to a microwave-assisted supercritical carbon dioxide cyclic fracturing system and a microwave-assisted supercritical carbon dioxide cyclic fracturing method. The microwave-assisted supercritical carbon dioxide cyclic fracturing system comprises a liquid carbon dioxide tank, a heater, a boosting pump, a fracturing pipe, a return pipe, a three-phase separator, an air compressor and a cooler which form a loop to achieve supercritical carbon dioxide cyclic fracturing, and a fracture network is formed in a coal seam. According to the microwave-assisted supercritical carbon dioxide cyclic fracturing method, the coal seam and carbon dioxide are subjected to microwave heating to ensure that the carbon dioxide is in the supercritical state for a long time, and heat effect of microwave heating is capable of fracturing coal masses, dredging pores and promoting gas desorption. The microwave-assisted supercritical carbon dioxide cyclic fracturing system and the microwave-assisted supercritical carbon dioxide cyclic fracturing method have the advantages that the supercritical carbon dioxide high in diffusivity is capable of going deep into coal mass pores and fractures quite easily as well as dispelling gas; operation costs are reduced effectively and the construction technology is simplified effectively through cyclic fracturing; microwave radiation is combined with supercritical carbon dioxide cyclic fracturing to increase porosity and permeability of the coal seam greatly and promote gas desorption, so that gas extraction effects are improved substantially, and the system and the method are highly practical in the field.

The present invention relates to laser machining method for micro molding on the surface of workpiece. By means of semiconductor pumped YAG laser and acousto-optical Q modulation to generate pulse laser as well as the new laser machining technique of applying multiple laser pulses to the same point, micro notch in the controlled depth is machined on the surface of workpiece. The method is suitable for use on most metal materials and non-metal materials, especially metal materials, and has high machining quality. The present invention has the advantages of greatly reduced negative heat effect of laser machining and obviously raised micro molding quality.

The invention provides a metal hydride hydrogen storing device, comprising a tank body, an air inlet and an air outlet above the tank body, a hydrogen distribution pipeline in the tank body and a filler area, wherein the air inlet and the air outlet are connected with a valve to control inputting and outputting of hydrogen; the hydrogen distribution pipeline is arranged inside the tank body; and the filler area is filled by means of coating hydrogen storage alloy powder by a certain thickness of a foam metal material or a foal metal phase change composite material in a cylindrical shape. The metal hydride hydrogen storing device has the advantages as follows: (1) the foam porous material provides a storage position for the hydrogen storage alloy powder, so as to effectively restrain flow accumulation of the alloy powder, buffer volume expansion of the hydrogen storage alloy powder and reduce pressure of a container; (2) a metal framework structure provides a good heat conducting channel for the hydrogen storage alloy powder, and the foal metal phase change composite material can buffer heat effects in hydrogen sucking and discharging of a hydrogen storage alloy, so that the heat utilization efficiency is improved; (3) a contact area of the hydrogen storage alloy powder and the hydrogen is larger and the hydrogen can rapidly and efficiently contact the alloy powder by using the hydrogen distribution pipeline, so that the rapid hydrogen sucking and discharging of the hydrogen storage device can be realized; and (4) the device has the characteristics of simple entire structure, light weight and low cost, can be used as a hydrogen storage device and further can be used as a hydrogen purifying device.