51results about How to "Reduced feasibility" patented technology

A method and system is disclosed for validating honesty of a student taking an online test. A camera is used to detect and monitor the test taker's eye movements and eye gaze positions during the taking of the test to ensure the test taker is looking only at the computer display showing the questions and answer choices to the test taker. A microphone is incorporated into, placed on, or in the vicinity of the computer display and the system compares audio received to recorded voice of the test taker to detect another voice. Other voices and eye movement beyond the display screen may be flagged as indicative of dishonest test taking.

The invention discloses a single-wavelength 100G light module. The module includes a light emitting unit and a light receiving unit. The light emitting unit receives a 100G/s-rate NRZ electrical signal, encodes and converts the 100G/s-rate NRZ electrical signal into a 50G/s-rate four-level electrical signal, and converts the 50G/s-rate four-level electrical signal into a 50G/s-rate PAG4 (Pulse Amplitude Modulation) light signal for emitting; and the light receiving unit receives the 50M/s-rate PAM4 light signal, converts the 50G/s-rate PAM4 light signal into a 50G/s-rate four-level electricalsignal, and decodes and converts the 50G/s-rate four-level electrical signal into a 100G/s-rate NRZ electrical signal for output. The single-wavelength 100G light module of the invention can support single-path 100Gb/s-rate transmission service, reduce use quantity of light devices, reduce costs of the light module, and be completely compatible with existing 100G switch interfaces at the same time.

The disclosed process consists in filling the gap between a billet and the wall of a sectional mould with a molten slag in at least two stages. When the first portion is poured in, the gaps between the sections of the mould are filled. Once the slag in the gaps is solidified completely, voltage is supplied and the second and next portions of the slag are added. The creation of an electromagnetic field inside the mould takes place following the starting of the cladding process. The liquid metal is then added for the cladding process, which is carried out by means of the stable rotation of the slag and metal. The process can be carried out with varying levels of slag inside the current-carrying part of the mould. The billet can be preheated at the short-circuiting conditions prior to the cladding process.

The invention discloses a preparation method of low-temperature quick-soluble agar. The method comprises the following steps: 1, mixing agar powder with water to obtain a mixture, and heating at high temperature until the mixture is completely dissolved to form an agar solution; 2, carrying out ultrasonic treatment of the agar solution; 3, adding cosolvent into the solution obtained in the step 2, fully dissolving and evenly stirring; 4, carrying out high pressure homogenization treatment of the solution obtained in the step 3; 5, carrying out granulation treatment of the solution obtained in the step 4; and 6, sieving to prepare the low-temperature quick-soluble agar. Under the premise of reducing a melting point of the low-temperature quick-soluble agar, the low-temperature quick-soluble agar has relatively strong gel strength.

The invention provides a commodity information management system and method based on a two-dimensional code and a self-dissolving system, and relates to the technical field of commodity information management methods. The method comprises the steps: the initializing of commodity information; the reading of commodity information; the dissolving of commodity information; and the unblocking of the self-dissolving commodity information. According to the invention, a commodity certificate which can be inquired is provided, and a dealer and a consumer can obtain the detailed commodity information through the commodity certificate, so as to discern the false from the genuine. Moreover, the commodity certificate cannot be faked or used repeatedly, thereby preventing a counterfeit and shoddy product from using a true package.

The invention provides a prefabricated stiffness concrete shear wall plate with steel beam connecting keys, an assembled stiffness concrete shear wall and a manufacturing method. An edge restraint component is arranged on the prefabricated stiffness concrete shear wall plate; an upper connecting steel beam is welded and connected with the top ends of two edge profile steel, upper steel beam connecting keys are welded and connected to the two ends of the upper connecting steel beam, a lower connecting steel beam is welded and connected with the bottom ends of the two edge profile steel, and lower steel beam connecting keys are welded and connected to the two ends of the lower connecting steel beam; bolt holes are correspondingly formed in the upper steel beam connecting keys and the lower steel beam connecting keys; and built-in anchor bolts are embedded in the concrete around a wall. The invention provides an assembled stiffness concrete structure shear wall structure with the steel beam connecting keys and a connection mode of the wall, the rigidity of the wall is large, the lateral resistance is high, the assembly form of joints is simple, the cost is low, operation is convenientand fast, feasibility is good, the precision requirement is low, connection is reliable, stress is clear, the shear force between shear walls can be well transmitted, and the prefabricated stiffnessconcrete shear wall plate can be widely used in the assembly of high-rise buildings.

The invention discloses an identity authentication method fusing user multi-source sound production characteristics, a storage medium and equipment. The method comprises the following steps: constructing a sensing terminal; designing a transceiving protection mechanism, adding dynamic random noise during signal transmission in a label communication process of an RFID reader-writer and the sensingterminal, eliminating the noise and recovering a label EPC during signal receiving, and judging whether a sensing signal is true or false; identifying a user voice command, and if the user voice command contains a keyword, determining to enter a next step or reject the request and end according to whether the sensing terminal tag EPC can be correctly recovered; performing noise reduction and voiced part detection on the voice signal, converting the voice signal into a time-frequency spectrogram, extracting radio frequency signal phase information and preprocessing the radio frequency signal phase information; and simultaneously inputting the processed voice and radio frequency sensing data into a neural network through two branches, and carrying out user identity authentication. Based on the realization of voice and radio frequency technologies, the system can be ensured to be safe and credible, and relatively high application value, social significance and development potential are achieved.

The invention discloses a preparation method of high-carbon metallized pellets for electric arc furnace smelting. The preparation method comprises the steps that carbon-containing powder is added intoiron concentrate for material preparation according to the mass ratio of carbon to iron of 1.5-2:1, prereduction is carried out at a reduction temperature of 1000-1300 DEG C for 40-60min, the reduction product is ground to 0.4-0.5 mm granularity, 4-6% of a binding agent and 9-12% of water are added, the mixture is mixed evenly, pressed into pellets and dried at the temperature of 120-140 DEG C for 60-90min, the high-carbon metallized pellets are obtained, and the pellets can reach the falling strength of 3-4 and reach the density of 2.6-3.3g/cm<3>. Molten steel can be stably and efficiently recarburized by the pellets below the slag-steel interface, the problems that the density of conventional carburant is insufficient, the carburant rapidly floats on the surface of furnace slag after being added, and the carburizing effect is poor are solved, meanwhile, the pellets can perform a good carbon-oxygen reaction below the slag-steel interface to remove inclusions and gas, formation of a large amount of foam slag is promoted, electric arc is stabilized, smelting time is shortened, iron loss is effectively reduced, steel material consumption is remarkably reduced, the metal yield is improved, and the smelting cost is reduced.

The invention discloses an active underground instrument heat management system and method. The active underground instrument heat management system comprises a pressure bearing cavity, a heat preservation cavity, fins, a chip box, a semiconductor chilling plate, a heat conduction copper block and a semi-arc copper shoe, wherein a notch is formed in the position, close to the top, of the heat preservation cavity; the chip box is installed in the notch; the semiconductor chilling plate, the heat conduction copper block and the semi-arc copper shoe are installed inside the chip box in sequence; the cold end of the semiconductor chilling plate is tightly attached to the chip box; the heat end of the semiconductor chilling plate is tightly attached to the heat conduction copper block which is tightly attached to the semi-arc copper shoe; the semi-arc copper shoe is located on the outer surface of the heat preservation cavity; the fins are arranged in the heat preservation cavity; the tops of the fins are fixed outside the chip box; seal end caps are arranged at the two ends of the heat preservation cavity; the heat preservation cavity is formed inside the pressure bearing cavity; and the semi-arc copper shoe is in contact with the inner surface of the stainless steel pressure bearing cavity. By arranging a cooling device inside to protect a normal-temperature electronic component, continuous cooling and heating management on the temperature field inside a logging instrument is achieved, and high-temperature well logging is achieved through a normal-temperature chip.

Systems and methods for controlling access to a vehicle or other object are provided. A vehicle-based authentication unit and mobile access device, e.g., a key fob, that wirelessly communicates with the vehicle-based authentication unit may each include environmental sensor(s) that collect respective environmental data local to the respective device/unit, e.g., GPS data, local temperature data, local barometric pressure data, etc. The mobile access device transmits an access request message (e.g., a response to a challenge from the vehicle-based authentication unit) that includes environmentaldata collected by the onboard sensor(s). The vehicle-based authentication unit receives the access request message and determines whether to grant access to the vehicle based on the environmental data included in the message. For example, the authentication unit may compare the environmental data in the access request message with corresponding environmental data collected by sensor(s) at the vehicle, or with other reference data (e.g., user-specific fingerprint data).

The present invention provided a method for salting-out extraction of acetone and butanol from a fermentation broth, characterized in that one type, or two or more types of salts and one type, or two or more types of extractants are added to an acetone-butanol-ethanol (ABE) fermentation broth, in which the salt saturation achieves 10%˜100%; and the volume ratio of the fermentation broth containing salts to the extractants is 1:0.1˜1:5. The mixture is allowed to stand until phase separation is formed. The top phase is a solvent phase or extraction phase enriched with acetone and butanol whereas the bottom phase is a salt-enriched phase or raffinate phase. This method involves many advantages, such as the simplified operation procedure, accelerated separation process and low separation cost, and therefore becomes a promising method of separating acetone and butanol in industrial application.

The invention relates to the field of genetic engineering medicines, in particular to a novel polyethylene glycol modified recombinant human basic fibroblast growth factor and a preparation method thereof. According to the invention, straight-chain monomethoxy polyethylene glycol aldehyde is adopted to modify the human basic fibroblast growth factor. The modification reaction is carried out in anacidic reaction system under the conditions that the mole number of PEG is excessive, the protein concentration is 2-10 mg/ml and the like, and the reaction mixture is purified through molecular sievechromatography and other steps to obtain a pure product. The polyethylene glycol modified recombinant human basic fibroblast growth factor disclosed by the invention has a wide application prospect in preparation of medicines for promoting wound repair.

The invention discloses a ceramic bonding area surface modification method suitable for ceramic/metal connection. The method comprises the following steps: carrying out magnetron sputtering coating onthe surface of a ceramic component to coat the surface of the ceramic component with a metal coating; using titanium hydride powder for carrying out titanium hydride sintering on the ceramic component plated with the metal coating film on the surface under the vacuum condition, generating a titanium layer on the surface of the metal coating film, and during titanium hydride sintering, filling theceramic component and the periphery with the titanium hydride powder; and after titanium hydride sintering is finished, finishing surface modification of the ceramic bonding area prepared from the ceramic/metal integrated component. By using the method, an alloying transition layer can be formed in the ceramic and metal bonding area, the surface energy of the ceramic bonding area can be remarkably improved, the wettability of the ceramic surface to the metal material is improved, and thus the joint performance and the stability of the ceramic/metal integrated component are improved.

The invention discloses a 3-gear double-clutch automatic gearbox for a motor electromobile. The 3-gear double-clutch automatic gearbox comprises a clutch K1, a clutch K2, a synchronizer, an input shaft, a second shaft parallel to the input shaft, a first-gear gear pair, a second-gear gear pair and a third-gear gear pair. The clutch K1 and the clutch K2 are arranged at the two ends of the input shaft, and the clutch K1 transmits power to the second shaft through the second-gear gear pair. The clutch K2 transmits power to the second shaft through the third-gear gear pair. The first-gear gear pair comprises a first-gear driving gear and a first-gear driven gear engaged with the first-gear driving gear. The first-gear driving gear is fixedly connected to the input shaft, and located between the second-gear gear pair and the third-gear gear pair. The synchronizer is arranged on the second shaft and located between the first-gear gear pair and the second-gear gear pair or the third-gear gearpair, and controls the first-gear driven gear of the first-gear gear pair to be connected with the second shaft. The 3-gear double-clutch automatic gearbox is mainly used for load-carrying vehicles with the load capacity larger than 10 t, meanwhile, the power of a motor is expected to be as small as possible, and therefore the specification and cost of all electrical components of the whole vehicle are reduced.

The invention discloses a key geometric error tracing method for a multi-axis numerical control machine tool and belongs to the technical field of machine tool precision analysis. The invention particularly relates to a spatial motion error modeling method of the multi-axis numerical control machine tool based on a multi-body system theory, a machine tool machining precision prediction method based on a side edge milling principle and a key geometric error traceability analysis method. According to the method, a multi-axis numerical control machine tool space motion error model, a machining precision prediction model and a key geometric error traceability analysis model are established. In machine tool precision optimization design truncation, a multi-axis numerical control key geometric error is subjected to traceability analysis, so that a machine tool design engineer can accurately identify the key geometric error conveniently, and the influence weight of each geometric error on the machine tool machining precision can be obtained before machine tool precision optimization design; machine tool precision design is correctly guided, and a theoretical foundation is laid for numerical control machine tool precision optimization design work.