492results about How to "Avoid introducing" patented technology

Methods and apparatus for use in a wellbore to meter and choke certain components from being produced, based upon their density relative to the density of oil are disclosed. The device includes an inner tubular body portion having apertures in the wall thereof for passing oil, an outer tubular body and at least one metering orifice therebetween to meter production. Disposed around the inner body is an axially movable member to selectively cover and expose the apertures of the inner body, thereby permitting fluid to flow therethrough.

Systems and methods for determining surgical system settings during a surgical procedure are disclosed. The surgical systems comprise of a control system, a means for tissue removal, sensing capabilities and machine learning application(s). The sensing capabilities and machine learning application(s) are configured to determine type and/or properties of the removed tissue and to predict preferred surgical settings for optimized removal and surgical outcomes. The learning machine application(s) communicates these preferred settings to a surgical control system.

A system for measuring a metabolic parameter. The system includes an integrated airway adapter capable of monitoring any combination of respiratory flow, O₂ concentration, and concentrations of one or more of CO₂, N₂O, and an anesthetic agent in real time, breath by breath. Respiratory flow may be monitored with differential pressure flow meters under diverse inlet conditions through improved sensor configurations which minimize phase lag and dead space within the airway. Molecular oxygen concentration may be monitored by way of luminescence quenching techniques. Infrared absorption techniques may be used to monitor one or more of CO₂, N₂O, and anesthetic agents.

The invention comprises a method for measuring the relative thickness of the lipid layer component of the precorneal tear film on the surface of an eye after distribution of the lipid layer subsequent to blinking. Light is directed to the lipid layer of a patient's eye with an illuminator. The illuminator is a broad spectrum light source covering the visible region and is a lambertion light emitter such that the light source is specularly reflected from the lipid layer and undergoes constructive and destructive interference in the lipid layer. The specularly reflected light is collected and focused using a collector such that the interference patterns on the tear film lipid layer are observable. The collector also produces an output signal representative of the specularly reflected light which is suitable for further analysis, such as projection on to a high resolution video monitor or analysis by or storage in a computer. In order to facilitate ease of measurement, the patient's head may be positioned on an observation platform when the illuminator directs light to the lipid layer of the patient's eye.

The invention relates to the field of biology, and discloses a serum-free culture medium which essentially comprises an IMDM (Iscove Modified Dulbecco Medium), L-glutamine, sodium bicarbonate, Hepes, recombinant human insulin, recombinant human transferrin, recombinant human albumin, 2-mercaptoethanol, protocatechuic acid, lipid, amino acid, vitamins, trace elements, Pluronic F-68, hydrocortisone, vitamin C, bonding amine or recombinant human fibronectin, progesterone, putrescine, heparin, serotonin, epidermal growth factors (EGFs), b-fibroblast growth factors (FGF), platelet derive growth factor (PDGF)-BB and insulin-like growth factor (IGF)-I. The serum-free culture medium is clear in chemical components, free from animal sources and serum and safe and ideal in cell cultivation and avoids the doped animal components and unstable batches, and the results of the cultured mesenchymal stem cells show that the total cellular score, the cell phenotype and the secretory cell factors are normal, so that the serum-free culture medium has good industrial application prospect.

A device, system and method for axenically culturing and harvesting cells and/or tissues, including bioreactors and fermentors. The device is preferably disposable but nevertheless may be used continuously for a plurality of consecutive culturing/harvesting cycles prior to disposal of same. This invention also relates to batteries of such devices which may be used for large-scale production of cells and tissues. According to preferred embodiments of the present invention, the present invention is adapted for use with plant cell culture.

The invention comprises an apparatus for measuring the relative thickness of the lipid layer component of the precorneal tear film on the surface of an eye after distribution of the lipid layer subsequent to blinking is disclosed. An illuminator directs light to the lipid layer of a patient's eye. The illuminator is a broad spectrum light source covering the visible region and is a lambertion light emitter such that the light source is specularly reflected from the lipid layer and undergoes constructive and destructive interference in the lipid layer. A collector collects and focuses the specularly reflected light such that the interference patterns on the tear film lipid layer are observable. The collector also produces an output signal representative of the specularly reflected light which is suitable for further analysis, such as projection on to a high resolution video monitor or analysis by or storage in a computer. In order to facilitate ease of measurement, the patient's head may be positioned on an observation platform when the illuminator directs light to the lipid layer of the patient's eye.

Containers and methods are disclosed whereby portions of an available stand-by supply of flowable material within a container may be dispensed substantially immediately on-demand. Preferably, the containers include an open-ended container shell having a resilient, shape-retaining side wall defining an interior space, a liner positioned within the interior space of the container shell, and a cap closing the open-ended container shell to seal the liner against leakage of flowable material. The liner has a flaccid liner body for containing a flowable material to be dispensed. The cap has a discharge opening to allow an amount of flowable material to be discharged therethrough from the liner body. Importantly, the container includes a valve system which includes one-way discharge and inlet valves. The one-way discharge valve allows only flowable material to be discharged from the liner via the discharge opening, but prevents ambient air from being introduced into the liner when the discharge of flowable material is finished. The one-way inlet valve serves to trap air within the interior space of the container shell in response to a collapsing force applied against the side wall of the container shell which, in turn, allows ambient air to enter the interior space when such collapsing force is removed.

A motor having a rotation shaft extending in a horizontal direction and efficiently cooling stator portion includes a cooling oil inlet provided in a lower portion of the motor in order to introduce the cooling oil supplied from an oil pump through a supply pipe, a coil end cover for immersing a stator portion of the motor in order to discharge the cooling oil from the motor, and a discharge pipe connected to the cooling oil discharge outlet for discharging the cooling oil to an oil pan.

The invention provides a preparation method of high-purity collagen protein sponge, and relates to a preparation method of collagen protein sponge. The preparation method of the high-purity collagen protein sponge is used for solving the problems that the collagen protein sponge prepared by using a conventional method is long in production cycle and low in yield and purity and has poor hemostasis performance. The preparation method of the high-purity collagen protein sponge comprises the following steps: step one. pretreating fresh bovine heel tendons; step two. extracting collagen protein; step three. centrifuging; step four. salting out; step five. dissolving; step six. carrying out gradient dialysis; step seven. pre-freezing; step eight. carrying out freeze drying; and step nine. sterilizing. The final product prepared by using the method has a smooth and flat surface and relatively good hemostatic performance and is uniform in pore size distribution. The product has relatively high purity (the total amount of amino acids reaches 97.73%), an obvious hemostatic effect and no abnormal taste, is safe, non-toxic, high in yield and short in time; liquid is clear without impurities; the production cycle is shortened; the whole preparation process is carried out at a room temperature; the biological activity of the collagen protein is maintained; and the application of the high-purity collagen protein sponge in clinical is improved.

Hydrogenation of a chlorosilane takes place in a reactor having a graphite reaction chamber with a surface which contacts the chlorosilane and a graphite electric heating element which also contacts the chlorosilane, wherein an Si-containing compound and hydrogen are contacted with the reaction chamber and the heating element such that an SiC coating is formed in situ on their surfaces in a first process step, and hydrogenation of the chlorosilane is effected by heating of a chlorosilane/hydrogen mixture in the reaction chamber by means of the heating element in a second process step, the first process step carried out at a reaction temperature which is higher than the reaction temperature of the second process step.

A positive air system, for a fluid jetting device that jets a fluid in a fluid droplet path prevents the ingress of dust and debris to the fluid jetting device and further prevents the introduction of dust and debris into the fluid droplet path. The air system includes an enclosure having at least one wall defining a barrier and enclosing the fluid jetting device. The barrier defines a local environment. The at least one wall has a plurality of orifices formed therein that are configured to direct a stream of pressurized air therefrom in a direction that diverges from the fluid droplet path. The fluid droplet path and the pressurized air stream direction do not converge so that the pressurized air flowing from the orifices does not interfere with the fluid moving through the droplet path.

In an air lock for continuous introduction into and/or removal of workpieces from spaces (1,4) separated atmospherically, the individual substrates (3,13) are transported through a transfer channel (24). At least one lock chamber (7a-7m) serving to accommodate the substrates (3,13) is arranged movably in the transfer channel (24). During the substrate transport in the transfer channel (24), the lock chamber (7a-7m) is atmospherically separated both from the exterior (1) having normal pressure and from the coating chamber (4). The air lock (2) includes a carrousel lock which has a carrousel housing (24) and a lock chamber wheel (10). On the periphery in the lock chamber wheel (10) individual lock chambers (7a-7m) are provided, in which the workpieces (3,13) to be brought into the chamber to be loaded (4) are inserted freely accessible on the normal pressure side. By turning the lock chamber wheel (10), the substrates (3,13) in the lock chambers (7a-7m) are transported from the coating station (A) to the transfer station (B) into the treatment chamber (4) diametrically opposite the normal pressure side. In the transfer station (B) the substrates (3,13) are removed from the transfer channels (7a-7m) by means of a transfer device (17') and are available for further treatment in the treatment chamber (4). The treatment chamber (4) includes, for instance, of a vacuum-coating chamber in which the workpieces (3,13) as the substrates to be coated are coated by a vacuum-supported coating method.

The invention relates to a preparation method of a magnetic cadmium ion surface imprinted polymer, which comprises the following steps: synthesizing magnetic Fe3O4@SiO2 microspheres through a coprecipitation method and a sol-gel method, and treating with acid to increase the surface hydroxyl content; introducing polymerizable double bonds onto the surfaces of the Fe3O4@SiO2 microspheres through a two-step method, namely grafting amino groups onto the surfaces of the microspheres by using aminosilane coupling agent, and generating the double bonds through reaction between acid anhydride and the amino groups; and finally, performing polymerization reaction by taking the Fe3O4@SiO2 microspheres as carriers, taking Cd(II) as a template, taking ethylene glycol dimethacrylate as crosslinking agent and taking methacrylic acid and salicylaldoxime as monomers, and washing off the template Cd(II) after the reaction, thus obtaining a polymer layer with a large number of Cd(II) imprinted holes distributed on the surfaces of the Fe3O4@SiO2 microspheres. The magnetic cadmium ion surface imprinted polymer provided by the invention can be used for separation and removal of cadmium ions.

The invention relates to putty powder, in particular to functional diatomite putty powder and a preparation method thereof, wherein the putty powder includes in percent by weight: 10-50% of high-temperature activated diatomite, 5-30% of an inorganic binder, 30-70% of an inorganic filler, 0.01-2% of a functional aid, 0.1-5% of an inorganic pigment, 0.5-5% of an organic binder, and 0.5-5% of an organic aid. The functional diatomite putty powder meets the related standard requirements of putty powder and diatomite, and has qualified constructability and functionality, namely having standard-meeting properties such as humidity regulation, formaldehyde clarifying performance, long duration of formaldehyde purifying performance, mold-proof performance, and mold durability.

The invention discloses a branch controllable titanium dioxide nanotube array thin film and a preparation method thereof. The thin film consists of an array of a titanium dioxide nanotube formed by connecting a main tube and a branch tube in series; the thickness of the thin film is 1-100mum, and the porosity factor is 40-60 percent. The preparation method comprises the following steps: preparinga main tube electrolyte according to the proportion that the mole ratio of ammonium fluoride to glycol to water is 0.05-0.15:17.7:0.015-0.025, and preparing a branch tube electrolyte according to theproportion that the mole ratio of hydrofluoric acid to glycol is 0.15-0.25:17.7; then firstly, putting one surface of a titanium sheet in the main tube electrolyte to serve as the anode; carrying outanode oxidization under the conditions that the DC voltage is 55-65V and the temperature is 0-35 DEG C for 0.5-6h; then using the glycol to clean the anode; subsequently, putting the surface which isanodized in the branch tube electrolyte to serve as the anode, and carrying out anode oxidization under the conditions that the DC voltage is 30-120V and the temperature is 0-35 DEG C for more than 30min, thereby preparing the thin film. The thin film can be widely used for fields of dye-sensitized solar cells, gas sensors, photolytic water hydrogen production and photonic crystal.

A amplitude adjustment device of degital optical circulator based on the FPGA is disclosed, the light come from the light source (S1) is incidengted into the coupler (S3), and two beams are obtained via the coupler (S3), one of the two beams is merotomized into two beams each of which is incidengted into the two ends of the fibre-optical ring (S5) via the optical waveguide modulator (S4), the two beams are synthesized into one beam and interference after one loop circulating the fibre-optical ring (S5) and passing through the optical waveguide modulator (S4); then the beam is incidengted into the detector (S2) via the coupler (S3), the electrical signal which expresses the optical power passes the front amplifying circuit (E1) to be enlarged and filted after the conversion in detector (S2), passes the A/D converter (E2) to complete the analogue/digital conversion to output the degital signal to the signal processing module (E3) which outputs the degital modulating signal to D/A converter (E4), the analog signal outputed is enlarged by the modulation amplifying circuit (E5) and is outputed to the optical waveguide modulator (S4). The invention makes the output voltage alignment circuit of the modulating step wave integrated just in one chip of FPGA processor, not getting involved in the simulation model. The attitude of the square wave uses the digital shift mode directly and is gained from the step wave resetting voltage. The square wave and the step wave is added directly in digital-sum in FPGA instead of adding in analog add circuit.

The invention discloses a gray generalized regression neural network-based small sample software reliability prediction method. The method comprises the following steps of: first, respectively emulating and expanding failure time data and test coverage rate data in collected small sample software reliability test data by using an improved Bootstrap method to form expanded reliability data which has the same failure statistical rule as small sample reliability data; then, obtaining a three-dimensional curve of the failure time, the test coverage rate and the unreliability of the expanded reliability data; next, establishing a gray generalized regression neural network; later on, training the gray generalized regression neural network by adopting the expanded reliability data and establishing a small sample software reliability prediction model; and finally, predicting by using the model to obtain software reliability prediction information. The method avoids solving a complex multivariate likelihood equation, and solves the problem that an available prediction model can be obtained only by training a large number of models in artificial neural network modeling in software reliability prediction.

The invention relates to a perovskite plane heterojunction solar cell and a preparation method therefor. The solar cell comprises a conductive substrate FTO, an electron transmission layer, a three dimensional-two dimensional perovskite layer, a hole transmission layer, and electrodes. The three dimensional-two dimensional perovskite layer is prepared through a vapor phase method. The three dimensional-two dimensional perovskite layer serves as a light absorbing layer, thereby greatly improving the humidity and temperature stability of the solar cell, reducing the requirements for the packaging technology, and reducing the consumption of an organic solvent. Moreover, the three dimensional-two dimensional perovskite layer prepared through the vapor phase method is higher in industrial production value, and provides a new idea for the industrial production of the perovskite solar cell with the high stability.

Disclosed are modified release oral tranexamic acid formulations and methods of treatment therewith.

The invention discloses a three-dimensional reconstruction method based on deep learning, and the method comprises the steps: (1), reconstructing a complete three-dimensional shape of a target througha constrained potential vector of an input image, carrying out the mapping between a learning part and the complete three-dimensional shape, and achieving the three-dimensional reconstruction of a single depth image; (2) learning intermediate feature representation between the three-dimensional real object and the reconstruction object so as to obtain a target potential variable in the step (1);and (3) converting the predicted voxel floating value in the step (1) into a binary value by using an extreme learning machine to complete high-precision reconstruction.

A welding chamber having a laminar-vortex inert gas flow is disclosed. The welding chamber comprises a transparent dome that covers an open top side of a rigid generally rectanguloid enclosure. The dome includes a one-way vent for discharging ambient air from within the chamber while preventing the introduction of ambient air into the chamber. The enclosure includes a bottom and side walls that are joined at smooth, curved edges, and at least one side wall of the enclosure includes portholes with gloves for manually accessing the interior of the chamber while the dome is in a closed position. At least one gas distribution tube, a plurality of gas inlets and laminar-flow tunnels are included. In use, an inert gas is introduced into the distribution tube that substantially encircles the top of the enclosure. The inert gas is directed downward through the laminar flow tunnels, attached to the side walls of the enclosure, where the gas exits each tunnel with a laminar flow and is directed by the radiused bottom corners of the enclosure from a vertical flow to a horizontal flow across the bottom of the enclosure. As such, the inert gas creates a slow-moving counter-clockwise vortex pattern. In this manner, heavier-than-air argon gas fills the enclosure, displacing ambient air within the chamber, which is forced to rise and exit the chamber through a check valve vent in the top of the dome.

The invention provides a preparation method of glyphosate potassium salt solid wet product or relative raw pesticide, which comprises mixing solid glyphosate with some water, to be added and reacted with alkali containing potassium cation, controlling the reaction temperature, cooling, crystallizing and drying to obtain glyphosate potassium salt drug. The invention further provides a preparation method of glyphosate potassium salt raw pesticide, which comprises that solid glyphosate is mixed some water, to be added and reacted with alkali containing potassium cation, the reaction mixture is directly dried to obtain glyphosate potassium salt raw pesticide. The invention further provides a high-content soluble solid glyphosate potassium salt. The inventive glyphosate potassium salt raw pesticide, compared with other glyphosate potassium salts, has better weeding speed and rain resistance in same conditions, while the potassium ions on leaf and in soil can be effectively absorbed by plantto feed potassium fertilizer. And the invention has simple package, storage and transmission of prepared glyphosate potassium salt raw pesticide, to reduce cost.

The invention relates to a preparation method of a magnetic zinc ion surface-imprinted polymer, which comprises the following steps: synthesizing magnetic Fe3O4@SiO2 microspheres by a coprecipitation process and a sol-gel process, and treating with acid to enhance the surface hydroxy content; introducing a polymerizable double bond onto the surface of the Fe3O4@SiO2 microspheres by a two-step process, i.e. grafting amino group onto the microsphere surface by using an aminosilane coupling agent, and reacting acid anhydride with the amino group to generate the double bond; and finally, carrying out polymerization reaction by using the Fe3O4@SiO2 microspheres as a carrier, Zn (II) as a template, ethylene glycol dimethacrylate as a crosslinking agent and methacrylic acid and salicylaldoxime as monomers, and after the reaction finishes, washing out the template Zn (II) to obtain the polymer layer in which abundant Zn (II) imprinted holes are distributed on the Fe3O4@SiO2 microsphere surface. The magnetic zinc ion surface-imprinted polymer can be used for separating and removing zinc ions.

The invention discloses an all-fiber electro-optical modulator based on graphene materials and a method of the all-fiber electro-optical modulator. The all-fiber electro-optical modulator based on the graphene materials comprises a single mode fiber, a silicon dioxide groove-type substrate, an Al2O3 transition thin layer and a graphene membrane, wherein the single mode fiber is arranged on the silicon dioxide groove-type substrate and fixed through sealed epoxy glue, a groove is formed in the single mode fiber, the Al2O3 transition thin layer is arranged in the groove, and the graphene membrane is arranged on the Al2O3 transition thin layer. Conductivity performance of graphene is changed through change of voltage applied on a metal electrode, therefore an imaginary part or a real part of an effective refractive index of a graphene composite layer structure is changed, and an electric absorption strength modulator or a phase modulator is achieved. The all-fiber electro-optical modulator based on the graphene materials and the method of the all-fiber electro-optical modulator can achieve design of the all-fiber electro-optical modulator, and have the advantages of being tiny in size, little in power consumption, low in insertion loss, high in modulating speed, beneficial for optical integration and the like. In addition, due to the fact that additional optoelectronic devices are not introduced, the all-fiber electro-optical modulator based on the graphene materials and the method of the all-fiber electro-optical modulator are suitable for being used in an all-fiber communication system and a dense wavelength division multiplexing (DWDM) system.

The invention provides a method for transferring graphene. The method comprises the following steps: providing graphene on a first substrate; covering a buffer layer on the graphene; adhering a heat release adhesive tape on the buffer layer; soaking the first substrate in a corrosive solution to remove the first substrate under the graphene; covering the graphene without the first substrate on a target substrate; heating to make the heat release adhesive belt become non-sticky, removing the heat release adhesive belt; and soaking the buffer layer in a dissolving solution to remove the buffer layer on the graphene to obtain graphene on a target substrate to finish the transferring of graphene. According to the method, a buffer layer is used to assist the transferring of graphene, the required steps are few, the process is fast and convenient, the upper and lower surfaces of graphene are clean, no substance is adhered on the upper and lower surfaces of the graphene, the wrinkles in the microscopic level are reduced, thus the effective usable area of graphene is enlarged, and the graphene can be more suitable for being used to prepare electronic devices.

The invention discloses a method for simultaneously preparing pure hydrogen and pure carbon monoxide by gasification without desorbed gas circulation. The crude synthetic gas prepared by the gasification unit is divided into two parts, one part is used for preparing pure carbon monoxide, and the other part is preparing pure hydrogen. The process of preparing pure carbon monoxide is divided into two parts: one part is used for preparing pure carbon monoxide with the crude synthetic gas prepared by gasification by a heat recovery unit, a low temperature methanol washing I unit, and a cryogenic separation unit; and the other part is used for preparing pure carbon monoxide by the hydrogen rich gas from the outlet of the cold box of the cryogenic separation unit sending into a PSA-CO unit. The feedstock of preparing hydrogen is divided into two parts: one part is the converted gas which is purified by a conversion unit and a low temperature methanol washing II unit with the crude synthetic gas prepared by gasification and contains carbon monoxide -1% (mol), and the other part is the hydrogen rich gas from a resurgent TSA device of the cryogenic separation unit, and the two parts of the gas are mixed and sent into the PSA-H2 unit to prepare pure hydrogen. The method has high recovery rates of carbon monoxide and hydrogen, has no desorbed gas circulation and no resurgent gas introduced by environment, has small investment and low energy consumption, and can adjust product gas scale of hydrogen and carbon monoxide flexibly.

The invention relates to a hydrogel dressing, comprising a non-woven fabric layer and a hydrogel layer arranged thereon. The hydrogel is poured on the non-woven fabric and cross-linked by an electron accelerator with an irradiation dose of 15-90 kGy; The hydrogel of the adhesive layer contains water-soluble polymers and monomers and water-soluble chitosan derivatives, the mass percentage of water-soluble polymers and monomers is 15-30%, and the mass percentage of water-soluble chitosan derivatives The percentage content is 0.5-3%; the water-soluble polymer and monomer are one or more of polyvinyl alcohol, hydroxyethyl methacrylate, sodium polyacrylate and gelatin, and the water-soluble chitosan derivative is the shell Polysaccharide hydrochloride. The hydrogel dressing has excellent water absorption performance and good air permeability, and has the functions of antibacterial, anti-inflammatory and promoting wound healing, and is suitable for wound protection and treatment of burns, scalds and traumatic wounds.

The present invention relates to magazines for firearms, and more particularly to magazines that accept blank cartridges for training and other exercises and that prevent the introduction of live cartridges. In an embodiment, the safety magazine includes an internal cavity that is shorter in length than a live ammunition cartridge. The internal cavity accepts shorter blank ammunition cartridges. The top-most ammunition cartridge in the magazine sits just under the magazine's feed lips, in the top-most ammunition position. A projection extends from the top end of the magazine opposite the feed lips to block a longer live ammunition cartridge from being inserted into the top-most ammunition position. Thus, live cartridges cannot be loaded into the magazine even at the top-most position of the magazine. The projection is retractable into the magazine.

Disclosed is a buckle attached to a belt or a strap which is connected to a rucksack, a bag, clothing, and a helmet, etc. so as to connect the belt or the strap. The buckle includes: a male member including a body and first latching means; and a female member which includes a body and second latching means rotatably coupled to the body so as to latch on the first latching means, for removably engaging with the male member. The buckle constructed as described above has a simple structure. Thus, it is possible to reduce the manufacturing cost of the buckle. Furthermore, there is an advantage in that the second latching means of the female member may be softly pushed, so as to easily release the male member from the female member.