257results about How to "Delay decay" patented technology

Fluidic adaptive lens devices, and systems employing such lens devices, along with methods of fabricating and operating such lens devices, are disclosed. In one embodiment, a lens material is optimally selected to provide one or more desired characteristics for a variety of applications related to adaptive lens devices. In another embodiment, a fluidic medium is optimally chosen to provide one or more desired characteristics for a variety of applications related to adaptive lens devices.

A method for detecting an object using visible light comprises providing a visible-light source having a function of illuminating an environment. The visible-light source is driven to emit visible light in a predetermined mode, with visible light in the predetermined mode being emitted such that the light source maintains said function of illuminating an environment. A reflection / backscatter of the emitted visible light is received from an object. The reflection / backscatter is filtered over a selected wavelength range as a function of a desired range of detection from the light source to obtain a light input. The presence or position of the object is identified with the desired range of detection as a function of the light input and of the predetermined mode.

A method for detecting an object using visible light comprises providing a visible-light source having a function of illuminating an environment. The visible-light source is driven to emit visible light in a predetermined mode, with visible light in the predetermined mode being emitted such that the light source maintains said function of illuminating an environment. A reflection / backscatter of the emitted visible light is received from an object. The reflection / backscatter is filtered over a selected wavelength range as a function of a desired range of detection from the light source to obtain a light input. The presence or position of the object is identified with the desired range of detection as a function of the light input and of the predetermined mode.

The invention relates to a large-size optical fiber preform and a manufacturing method of the optical fiber thereof. A fluorine-doped liner tube is used as a base tube for depositing cladding layers and a core layer and is melted and shrunk into a solid mandril, and then the solid mandril and a sleeve form the preform; or the cladding layer part is deposited on the surface of the solid mandril to directly form the mandril to draw wire on a wire drawing tower. Wire drawing also can be carried out on the preform or solid mandril before stretching. During the wire drawing process, the optical fiber is coated with two layers of coating so as to obtain a mono-mode optical fiber with high anti-fatigue parameter, low water peak and insensitivity to bending. The manufacturing method has the advantages of large preform size, long wire drawing length of a single preform, relatively simple process and low cost and is remarkably suitable for scale production. The optical fiber manufactured by the method has a low water peak, extremely low optical loss caused by bending and relatively high anti-fatigue parameter and is particularly applicable to the optical fiber to be used when bent radius is small, such as an optical fiber access network (FTTx) or a small optical device.

The invention discloses a multi-gap self-swelling strong-air-current longitudinal blow-out arc anti-thunder protecting device which comprises a longitudinal blow-out arc device arranged at an insulator string earthing terminal through a grounding side connecting hardware fitting, a grounding side electrode arranged on the longitudinal blow-out arc device, and a guide line side electrode arranged on an off-contact guide line. A protecting gap formed by the grounding side electrode and the guide line side electrode is parallel to an insulator string. The longitudinal blow-out arc device comprises an arc extinguishing device body and arc extinguishing tubes. The arc extinguishing device body is provided with a plurality of through holes for placing the arc extinguishing tubes. An angle formed by two arc extinguishing tubes which are arranged in the arc extinguishing device body is 90 degrees, and end portions of the two arc extinguishing tubes are in contact with each other. Each arc extinguishing tube is in a spiral shape. The grounding side electrode is connected with a first arc extinguishing tube through a guide line, and the grounding side connecting hardware fitting is connected with a last arc extinguishing tube through a guide line. The device is simple in structure, low in manufacture cost, safe and reliable, effectively reduces the power system transmission line thunderstrike tripping rate and the accident rate, and improves the stability of a power system.

The invention relates to a flexible intracranial cortex microelectrode chip, which comprises a flexible substrate, a microelectrode unit, an electrode lead which is electrically connected with the microelectrode unit, a lead welding spot which is electrically connected with the electrode lead, and an insulating layer which is arranged on the flexible substrate and covers the electrode lead, wherein the microelectrode unit, the electrode lead and the lead welding spot are arranged on the flexible substrate. The invention also relates to a method for preparing the flexible intracranial cortex microelectrode chip, a packaging structure for the flexible intracranial cortex microelectrode chip, and a method for packaging the flexible intracranial cortex microelectrode chip. The flexible intracranial cortex microelectrode chip has high flexibility and can be well adhered to cerebral cortex, information is detected, and electrical stimulation is applied. Better flexible matching between the flexible intracranial cortex microelectrode chip and the cerebral cortex can be realized, and in the long-term implantation process, attenuation of organism response on performance of the electrode is effectively reduced; and moreover, tissue damage, inflammatory response, incrustation, hemorrhage and other conditions are avoided.

The present invention is deburring method and apparatus based on laser shock wave technology and relates to laser machining technology. The present invention adopts the laser induced shock wave as the force source for deburring, and has laser generator controlled with one controller to generate laser pulse, light guiding system irradiating the laser pulse onto the absorbing layer of the reflecting cone, the absorbing layer to absorb laser energy to vaporize and ionize to form plasma, the plasma to further absorb laser energy to explode and to generate high amplitude shock wave eliminating burr in the surfaces, including inner surfaces, of parts. The present invention can eliminate burr, strengthen the surface, raise the hardness, lower the surface roughness and increase the service life of parts.

The invention belongs to the field of far infrared energy-saving coating used for a high-temperature industrial furnace, which particularly relates to a nanometer silicon carbide-series infrared radiation coating and a preparation method thereof. The coating is composed of a powder radiation material, a binding material, a slurry accessory ingredient and water, wherein the mass ratio of the waterto the powder radiation material is (0.5-2):1; the binding material is 10-30% of the total mass of powder radiation material; the slurry accessory ingredient is 0.1-3% of the total mass of powder radiation material; and the powder radiation material is composed of nanometer silicon carbide powder, zirconia powder, chromium hemitrioxide powder, ferric oxide powder, nickel oxide powder, bentonite powder and siliceous dust powder. The infrared energy-saving radiation coating disclosed by the invention has the advantages of high radiation coefficient and excellent thermal shock resistance. After high-temperature sintering, a sintering layer is formed on a refractory brick or cellucotton, the sintering layer can be firmly adhered on the surface of the lining of a kiln to perform the energy-saving effect on increasing radiant heat utilization and reducing heat loss.

The invention relates to a zoom lens imaging apparatus and method. The apparatus includes at least two zoom imaging units, a channel selector connected with the zoom imaging units; and a control unit connected with the zoom imaging units and the channel selector. Focal lengths of the zoom imaging units increase progressively in sequence, and the focal lengths of two adjacent zoom imaging units partially overlap. The channel selector is used for selecting and taking signals outputted by at least one zoom imaging units as the output. The control unit is used for controlling the focal length between the zoom imaging unit imaging at the moment and the zoom imaging unit imaging at the next moment to sequentially overlap with focal lengths between each two zoom imaging units within the former focal length, and also for controlling the channel selector to switch from taking the zoom imaging unit imaging at the moment as a signal input end sequentially to taking the zoom imaging unit imaging at the next moment as the signal input end. The zoom lens imaging apparatus and method can be used for reducing the attenuation effects of a zoom lens with a wide-range focal length on the environmental illumination.

The invention discloses a sensitizer, specifically an emulsified explosive energetic sensitizer, and particularly relates to a sensitizer formed by coating high-energy metal powder on porous silicon dioxide hollow microspheres and a preparation method of the sensitizer. The sensitizer mainly comprises the following components in parts by weight: 50-65 parts of a metal powder, 2-10 parts of a coating agent, and 30-45 parts of silicon dioxide. According to the preparation method provided by the invention, the high-energy metal powder for coating the porous silicon dioxide hollow microspheres is prepared through a four-step method, and is added into an emulsion matrix, and the high-energy metal powder and the emulsion matrix are mixed uniformly to prepare a high-strength emulsion explosive; shells of the porous silicon dioxide hollow microsphere of the energetic sensitizer achieve the effect of a sensitizer, and the high-energy metal powder inside the energetic sensitizer achieves the effect of an energetic additive. The sensitizer and the high-energy metal powder are combined into a whole body, the brisance of the emulsified explosive is improved under the condition that the sensitivity of the explosive is not influenced; moreover, the raw materials are wide in source, the cost is low, and the production process is simple, so that the sensitizer has a very good market prospect.

The invention discloses a method of extracting lignins different in molecular weight from bamboo pulping black liquor. The method includes: filtering the bamboo pulping black liquor, adjusting pH to 1.5 to 2.0, and acquiring lignin by settling; drying the lignin, dissolving the lignin with 90% acetic acid to obtain lignin acetic acid solution of low viscosity, and subjecting the lignin acetic acid solution to ultrafiltration and grading with ultrafiltration membranes having different cut-off molecular weights; and subjecting ultrafiltrate and cut-off liquid to precipitating with distillate according to the ratio being 1:10 and purifying with dichloroethane / water, diethyl ether and petroleum ether solvents to obtain lignins different in molecular weight distribution range. The pH value of the bamboo pulping black liquor of high viscosity is adjusted with hydrochloric acid to precipitate the lignin therein, the lignin is dissolved with the 90% acetic acid, and the lignin acetic acid solution is of low viscosity and is directly graded with the ultrafiltration membranes to separate the lignins; the method has the advantages that stock liquor needs no dilution, membrane flux is great, attenuating speed is low, a membrane component is simple to maintain, and the industrial applicability is high.

The invention discloses an ionic conductive polymer diaphragm for a lithium-sulphur battery, and a preparation method and application thereof. The diaphragm is mainly composed of a battery diaphragm and an ionic conductive polymer layer attached to the surface of the battery diaphragm. The diaphragm disclosed by the invention has lithium ion permselectivity and has good blocking effect to multi-sulphur anions; the lithium ion mobility of the polymer diaphragm is close to 1; the shuttling effect of the lithium-sulphur battery in a cyclic process can be effectively reduced; attenuation of the lithium-sulphur battery is inhibited; simultaneously, the effect of reducing side reaction due to shuttling of multi-sulphur anions can be realized; impedance is prevented from being further increased; and an effective method is provided for application of the lithium-sulphur battery.

The invention discloses a filter unit for a dark pipe for saline-alkali soil. The filter unit comprises a pervious layer, a dressing layer and a water filtering layer, the pervious layer is wrapped with the dressing layer, and the dressing layer is composed of PVC or PE prilling materials with the diameters ranging from 0.5 cm to 0.6 cm; the dressing layer is wrapped with the water filtering layer. According to the technology, the water filtering layer formed by thick sand and straw serves as a main filtering layer, so that large particles and sludge can be effectively blocked; the dressing layer serves as an auxiliary layer so as to further filter water flow flowing through the water filtering layer, and then water enters the dark pipe through the pervious layer, so that small particles can be effectively prevented from entering the dark pipe, and blocking is prevented; the straw and the thick sand are adopted, so that material selection is convenient, and the cost is reduced; the straw rotting speed is low, the effective using time can be guaranteed, supplementing is convenient, and soil can be improved after straw rots.