491results about How to "Avoid volume" patented technology

Methods and devices for partitioning or plicating a region of a hollow body organ are described herein. These methods and devices relate generally to medical apparatus and methods and more particularly to devices and methods for affecting a change in the function of a hollow body organ, particularly a stomach, intestine or gastrointestinal tract. These changes can include reducing the volume capacity of the hollow body organ, disrupting or altering the normal function of the organ, functionally excluding certain sections of the organ either by affixing adjacent tissue or excising certain regions, or affecting or correcting the response of the organ to naturally occurring stimuli, such as ingestion.

The invention relates to an aerogel composite material, in particular to a glass fiber reinforced silicon dioxide aerogel composite material and a preparation method thereof. The excellent properties of aerogel are maintained, the mechanical properties of the aerogel are reinforced, and the glass fiber reinforced silicon dioxide aerogel composite material has good integrity and certain strength. The glass fiber reinforced silicon dioxide aerogel composite material is prepared by compounding glass fiber and silicon dioxide aerogel, wherein the glass fiber is a reinforcement, and the content ofthe glass fiber accounts for 1-15% total mass of a sample; the silicon dioxide aerogel is a matrix, tetraethoxysilane is a silicon source material, and methyltrimethoxysilane or methyltriethoxysilaneis used as a silicon source co-precursor. The preparation method comprises the following steps of: firstly, pretreating the glass fiber; then, preparing glass fiber reinforced silicon dioxide composite wet gel; and finally, aging, secondarily modifying and drying the silicon dioxide composite wet gel.

An atomizer and an electronic cigarette are provided. The atomizer includes: an atomizer cartridge, a liquid storage chamber, a liquid separation plate, an electric heating element, a cigarette liquid locking member, a first glass fiber cloth, and an atomizing electrode assembly. The electric heating element twists along the transverse direction of the atomizer, and is laid on the first glass fiber cloth, and the electric heating element laid on the first glass fiber cloth has a snakelike sheet structure. The cigarette liquid can be uniformly transferred to the electric heating element, and the volume of the aerosol is uniform. Furthermore, the quantity of the cigarette liquid transferred to the electric heating element is ensured to be uniform. In addition, the length of the electric heating element and the contact area of the electric heating element in contact with the first glass fiber cloth are effectively increased.

The invention relates to a method for preparing graphene powder in large scale, which is characterized by comprising the following steps of: firstly, uniformly peeling graphene oxide into a graphene oxide suspension solution; then, atomizing the graphene oxide solution by using the spray drying technology comprising spray pyrolysis drying and spray freeze drying, and removing a solvent to obtain graphene oxide powder; and finally, oxidizing grapheme by using the non-expansion heat treatment process to obtain non-agglomerative graphene powder. The continuous preparation process of the spray technology and the non-expansion heat treatment process ensure the large-scale preparation of the graphene powder. The prepared graphene powder comprising intermediate product graphene oxide powder does not have agglomeration and has good dispersivity in the solvent. The graphene powder is used as a filling material to prepare high strength composite materials, conductive composite materials, novel air-tight flame-retardant composite materials, novel nanodevices and the like.

A device for increasing the time an animal takes to consume food from a food dish. The food dish of the present invention includes protrusions in the interior portion of the food dish. The protrusions create obstacles that the animal has to work around in order to remove food from the dish and thereby increases the time taken to consume food from the dish.

There are provided an anode for a lithium metal polymer secondary battery comprising an anodic current collector having a surface on which a plurality of recesses having a predetermined shape are formed and a method of preparing the same. The plurality of recesses are formed on a surface of the anodic current collector using a physical method or a chemical method. In a lithium metal polymer secondary battery employing the anode, oxidation/reduction of lithium and the formation of dendrite occur only in the recesses formed by surface patterning of the anodic current collector. Thus, expanding and shrinking of a battery due to a change in the thickness of the lithium anode can be prevented and cycling stability and the lifespan of a battery can be improved.

A piezoelectric device is provided with a sound source IC, an amplifier for amplifying a sound source from the sound source IC, a piezoelectric speaker for generating sound based on a drive signal from amplifier, an MPU for performing a predetermined control process on the drive signal, a memory for storing temperature dependency information about the piezoelectric constant (d₁₄) and Young's modulus E of the piezoelectric speaker, and a temperature sensor for detecting an ambient temperature. MPU has correcting unit, compares a detected result of the temperature sensor with the temperature dependency information, and performs temperature correction on the drive signal serving as an acoustic signal based on a compared result. The piezoelectric speaker outputs the acoustic signal temperature-corrected by correcting unit. Thus, it becomes possible to realize various piezoelectric devices, such as a piezoelectric speaker system, capable of preventing various input information from fluctuating even when there is a change in usage environmental temperature.

This invention relates to a kind of improving method of lithium ionic cell cathode materials. The cathode materials in need of improving are mixed evenly with catalyst which has 0.1úÑ-10úÑ weight percent of cathode materials. The materials are then put into reaction furnace, which uses hydrocarbon as carbon source. The cathode materials are mixed with buffer gas according to 1í†(0-10) volume ratio. Then the mixture are reacted in reaction furnace at 600-1300íµ for 1-900 minutes. A kind of improved composite cathode materials, at the surface of which in-situ grows nanometer carbon fibrin/ carbon tube, are gained. The improved materials have good cell kinetic ability, circulating ability, charge-discharge capacity and consistency with electrolyte.

This invention relates to a device for packaging and applying a substance that is in liquid, semiliquid, or powder form, in particular a cosmetic, the device comprising a receptacle that is open at one end and suitable for containing the substance, and an applicator comprising a stalk provided at one end with an applicator element and at its other end with a handle member, the applicator element being inserted into the receptacle and being withdrawn therefrom in contact with an elastically deformable wiper member. The wiper member is constituted at least in part by foam comprising at least 5% of open cells.

The present invention relates to a automated spraying device for spraying an enclosure with a liquid cleanser, the device having, a reservoir (16) for containing the liquid cleanser, a pump (14) in fluid communication with the reservoir, and a movable spray head (15) having an outlet orifice through which cleanser from the reservoir can be expelled during operation of the pump if there is such liquid cleanser in the reservoir. Said spraying device also contains an electrical motor drive mechanism (12) for sequentially operating th pump (14) and moving the spray head (15) to modify the direction of the spray there from, such that the spray head is not simultaneously spraying and moving. Furthermore, the spray head is suitable for producing an aerosol whereby the Dv50 of the aerosol is in the range of from 30 to 70 micron.

The embodiment of the invention discloses an insulated gate bipolar transistor-driven protective circuit which comprises a signal transmission circuit, a gate pole driving circuit, a voltage detecting circuit and a blocking time setting circuit, wherein the signal transmission circuit is used for transmitting a driving signal to the gate pole driving circuit; the gate pole driving circuit is used for amplifying the driving signal from the signal transmission circuit, and then driving an insulated gate bipolar transistor to act through the amplified driving signal; the voltage detecting circuit is used for transmitting a fault indicator signal to the blocking time setting circuit once the voltage between a collecting electrode and an emitting electrode of the insulated gate bipolar transistor is detected over a set voltage threshold, wherein the voltage threshold is more than the driving voltage of the insulated gate bipolar transistor; the blocking time setting circuit is used for transmitting a locking signal to the signal transmission circuit after receiving the fault indicator signal from the voltage detecting circuit; and the signal transmission circuit also can be used for blocking and outputting the driving signal to the gate pole driving circuit after receiving the locking signal from the blocking time setting circuit. With adoption of the insulated gate bipolar transistor-driven protective circuit, misinformation of a short circuit fault can be avoided.

The invention relates to a device and a method for simultaneously testing the permeability of compact rocks under transient state and steady state, and belongs to the fields of rock engineering and unconventional oil and gas reservoir engineering. The testing device for simultaneously testing the permeability of the compact rocks under the transient state and the steady state comprises a three-shaft pressure chamber, a bias pressure control system, a confining pressure control system, an upper end permeating system, a lower end permeating system, a vacuum pumping system, a constant temperature system and a data controlling and collecting system. The method for simultaneously testing the permeability of the compact rocks under the transient state and the steady state comprises the following steps: demarcating the reference volume, providing the confining pressure and bias pressure temperature environment for a sample, and testing the permeability under the transient state and the permeability under the steady state. For the device and the method, the practical bias pressure, back pressure and constant temperature testing environment conforming to the engineering is provided, the fluctuation error of the temperature can be controlled within -0.1 DEG C to +0.1 DEG C, the volume error of the gas can be controlled within 0.3%, and the error of the injected pressure can be controlled within 0.5%. The test of the permeability under the transient state in constant pressure and constant volume ways can be simultaneously realized; when the permeability is tested in the constant volume way, the volume of a reference container can be adjusted according to the volume of a pore.

A voice coil motor with a surface coil includes a set of magnetic sensing elements, a lens carrier physically connected to the set of magnetic sensing elements, a pedestal, and a set of printed circuit boards fixed onto the pedestal. A patterned metal layer is fabricated on the set of printed circuit boards to form the surface coil, a Hall sensor is installed on one of the printed circuit boards and transmits signals (e.g., operation voltages and feedback sensing signals) via traces fabricated on the set of printed circuit boards, so as to achieve simultaneous fabrication of the surface coil and traces, thereby saving space which is conventionally occupied by copper coils. The Hall sensor can sense a variation in a magnetic field resulting from the motion of the set of magnetic sensing elements to determine a motion status of the lens carrier.

A water jacket spacer has a spacer body molded in conformity to the shape of the water jacket and a regulating member whose one side is fixed to the spacer body. The regulating member is composed of a first member which is not water-swellable and is elastically deformable and a second member made of water-swellable elastomer which is integrally fixed to the first member. The regulating member lies in a state not-contacting an opposed wall of the water jacket when inserted into the water jacket together with the spacer body, whereas it blocks a part of cooling water flowing through the water jacket by deforming such that a side of the regulating member not fixed to the spacer body faces toward the opposed wall of the water jacket when the second member swells by absorbing cooling water flown into the water jacket and thereby the first member is elastically deformed.

The invention relates to the technical field of reliability test of a disc-type tool magazine and automatic tool-changing system for a machining center and specifically relates to a disc-type tool magazine and automatic tool-changing system comprehensive performance detection platform. The detection platform comprises a detection system, a test system and a control system. The detection system is used for finishing detection and collection of various parameters of the disc-type tool magazine and automatic tool-changing system; the test system is used for testing the reliability of the same-kind multi-dimension disc-type tool magazine and automatic tool-changing systems; and the control system is used for finishing setting of related test parameters in the test process and carrying out processing and analysis on the collected parameters, graphical display and test result display, and realizing comprehensive control of the detection system and the test system. The comprehensive performance detection platform is a test platform capable of loading the same-kind multi-dimension disc-type tool magazine and automatic tool-changing systems; and especially, the platform can carry out detection on the state and performance of the disc-type tool magazine and automatic tool-changing system and give corresponding analysis results.

The present invention relates to a two-dimensional preparative chromatography instrument system having the online enrichment function, and applications thereof. The system comprises a chromatography flow channel switching valve, a chromatography column, a solvent pump and a detector. According to the present invention, a trapping column collects a first-dimensional chromatography effluent component through valve switching and mobile phase dilution, and the trapped component is introduced into a second-dimensional preparative column through valve switching and mobile phase elution so as to achieve two-dimensional chromatography separation; the instrument system can perform two-dimensional separation, and the sample and the one-dimensional separation component are effectively retained and enriched through the trapping column interface, such that the column efficiency loss is low, and the two-dimensional separation effect is ensured; and the instrument system can enlargedly perform multiple circulation separations and multidimensional separation, and the separation effect can not be decreased along with the increasing sample volume and the increasing separation frequency. In addition, the instrument system further has the function of the concentration recovery on the finally-separated product so as to simplify the sample drying process, such that the degeneration of the sample during the heating drying process is easily be avoided.

There is constructed a constitution including an exhaust gas fired regenerator constituting a heat source by exhaust gas from an external machine generating the exhaust gas, an introducing flow path for guiding the exhaust gas to the exhaust gas fired regenerator, an exhaust flow path for exhausting the exhaust gas from the exhaust gas fired regenerator, a bypass flow path branched from the introducing flow path, flow path switching device including a first damper provided at the introducing flow path and a second damper provided at the bypass flow path for switching flow of the exhaust gas to the introducing flow path and the bypass flow path, a damper provided at the exhaust flow path for cutting off the exhaust gas from flowing in the exhaust flow path and gas delivering device for blowing a gas to a portion of the exhaust flow path between the damper for cutting off the exhaust gas from flowing and the exhaust gas fired regenerator.

The invention provides a chimeric antigen receptor T cell and application thereof. The chimeric antigen receptor T cell expresses a chimeric antigen receptor of a specific binding antigen, IL-7 and CCL19; signal peptide of the IL-7 is signal peptide of T cell secretion protein; and a promoter of the CCL19 is an NFAT regulation promoter. According to the chimeric antigen receptor T cell and the application thereof provided by the invention, the IL-7 and the CCL19 are optimized, the signal peptide of the IL-7 is changed, the continuous secretion of the CCL19 is changed to be conditioned secretion, the built CAR-T cell can continuously secrete the IL-7 to the outside of the cell, the secreted CCL19 is expressed after a tumor antigen is recognized, and immune cells are maximally recruited inside a tumor, so that an anti-tumor effect of the CAR-T cell is remarkably improved.

A current transformer for energy conversion in a super-conductive energy storage system utilizes a two-stage boost-chopper to fulfill boost control for discharge process in super-conductive energy storage magnets. The first stage of the chopper circuit adopts a plurality of metal oxide semi-conductor field-effect transistors in parallel connection, so that the voltage on both ends of a super-conductive magnet can be limited in a rather low voltage level to meet the insulation requirements of the super-conductive magnet. The second stage of the chopper circuit increases the voltage to a higher level, and utilizes IGBTs as switch components to regulate subsequent output voltage through adjusting the switch duty cycle of the IGBTs through a PWM control mode, so as to fulfill the adjustable target for subsequent output voltage and the controllable target of the super-conductive magnet discharge voltage. The invention can realize energy output in the super-conductive energy storage magnet in a constant-voltage and DC mode, in order to meet the requirements for subsequent voltage-type loads. Meanwhile, the output voltage of the current transformer is not limited by insulating strength of magnets, but can fulfill flexible regulation according to subsequent load, and meanwhile, avoid the large volume problems with transformers or the multiple circuit topology structure.

A silicon negative electrode of a lithium ion secondary battery comprises a conductive matrix and a material layer loaded on the surface of the conductive matrix, wherein the material layer is composed of a carbon material layer and a silicon layer; the carbon material layer is attached to the conductive matrix; and the silicon layer is attached to the carbon material layer. The battery prepared by the silicon negative electrode has both the higher volume ratio capacity and the favorable circulation performance.

The invention belongs to the technical field of a lithium ion battery, and particularly relates to an electrolyte applicable to a silicon carbon negative and a lithium ion battery comprising the electrolyte. The electrolyte comprises an electrolyte lithium salt, a non-aqueous organic solvent and an additive. Wherein the additive comprises a negative film formation additive, a fluorine-substitutedphenyl isocyanate compound additive with a formula I structure and a dosilane nitrogen-based compound additive. Compared with the prior art, the actual discharging capability, the cycle stability andthe high-temperature storage performance of a silicon carbon negative electrode lithium ion battery are effectively improved by means of a synergic effect generated by combined application of variousadditives, gas generation is prevented, the problems of volume expansion and pole plate pulverization of the battery during the charge-discharge process are solved very well, and meanwhile, the electrolyte is compatible with relatively good high- and low-temperature performance.

The invention discloses a preparation method of a silicon composite anode material provided with a gradient change coating layer on the surface, and aims to overcome conventional modification defects of a silicon anode material. According to the preparation method, a porous silicon material is prepared firstly, and on the basis, a chemical vapor deposition method is adopted to uniformly deposit a coating layer on the surface of the porous silicon material, wherein the coating layer adopts an elemental Si-SiC-C transition structure. A test is performed in a vapor deposition reacting furnace provide with segmented temperatures, independently controllable atmosphere and a plurality of furnace chambers. Compared with the prior art, a gradient change process is achieved through the surface coating layer, an obvious interface structure is not formed, the coating layer is tight, so that a volume effect and electric conductivity of the silicon-based anode material in a battery charge-discharge process are inhibited effectively, and the cycling stability of the material is improved greatly. The preparation method is simple in technology and suitable for large-scale industrial production, and has wide application prospect in the field of lithium ion batteries.

The invention discloses a three dimensional graphene/hollow carbon sphere/sulfur composite material, a preparation method thereof, and an application in lithium-sulfur batteries. The three dimensional graphene/hollow carbon sphere/sulfur composite material comprises nanometer elemental sulfur and a three dimensional graphene-hollow carbon sphere nano-compound, and the nanometer elemental sulfur is distributed in the three dimensional graphene-hollow carbon sphere nano-compound. The preparation method comprises the following steps: dispersing the three dimensional graphene-hollow carbon sphere nano-compound in an alcohol and water mixed solvent to obtain a suspension; and adding an aqueous solution of Na2S.9H2O and Na2SO3 into the suspension, adding an acidic solution, and reacting to obtain the three dimensional graphene/hollow carbon sphere/sulfur composite material. The composite material has the advantages of high specific capacity, stable cycle performances, and excellent rate performance and coulombic efficiency, the preparation method has the advantages of simplicity, convenience and good effect, and the composite material can be applied in the preparation of lithium-sulfur battery positive electrode materials.