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43results about How to "Low degree of modification" patented technology

Mobile robot system based on artificial road sign and docking method thereof and storage medium

The invention provides a mobile robot system based on an artificial road sign. The mobile robot system comprises the artificial road sign and the mobile robot. The mobile robot comprises a structuralbody, a sensor and a controller. The sensor and the controller are installed on the structural body. The controller comprises the following modules: a road sign identification module which acquires the surrounding environment data from the sensor and identifies the artificial road sign; a positioning module which calculates and acquires the real-time pose of the structural body relative to the artificial road sign and calculates the deviation data between the real-time pose and the target pose; and a navigation control module which generates a navigation control instruction according to the deviation data. The invention also correspondingly provides a docking method, a mobile robot positioning system based on the artificial road sign and a computer readable storage medium. The robot is enabled to be docked at different positions and orientations in the area where the road sign can be observed, the degree of environmental reconstruction is low and the position of the road sign does notneed to be accurately calibrated.
Owner:SHANGHAI JIAO TONG UNIV

Method for separating mixture of catalytic cracking rich gas and methanol-to-olefin reaction product

The invention relates to a method for separating a mixture of catalytic cracking rich gas and a methanol-to-olefin reaction product. According to the method, a catalytic cracking unit, an absorption stabilization unit, a gas fractionation unit and a set of methanol-to-olefin device are provided; the device comprises a reaction unit, a compression unit and a separation hot region; the methanol-to-olefin reaction product is compressed and separated through a pre-depropanizing tower, C4 is non-clearly cut, C1-C4 at the top of the tower are mixed with the catalytic cracking rich gas to obtain a mixture, and the mixture is separated by virtue of the absorption stabilization unit and the gas fractionation unit; residual liquid is separated through the separation hot region to form C4 products, C4-C6 cyclic hydrocarbons and gasoline; all or part of C4 products (containing catalytic cracking byproducts C4) of the gas fractionation unit return to a methanol-to-olefin reaction unit. Compared with the prior art, the method is used for a catalytic cracking and methanol-to-olefin combined device, a separation cold region and a refrigeration unit of a conventional methanol-to-olefin device can be omitted, the treating capacity of a catalytic cracking device is increased to the maximum extent, the economy of the catalytic cracking byproducts C4 is improved through circular cracking, and the operating energy consumption of the methanol-to-olefin device is reduced.
Owner:WISON ENG

Recycling method of excess sludge

The invention relates to a recycling method of excess sludge. The recycling method comprises the following steps: (1) a deep physical-chemical cytolysis stage: carrying out deep physical-chemical cytolysis treatment on the excess sludge of a sewage treatment plant so that the reduction rate of the excess sludge is greater than 30%; (2) a pre-concentration conditioning stage: continuously adding aninorganic coagulant to carry out pre-concentration conditioning treatment; (3) a dewatering conditioning stage: adding a macromolecular organic flocculant and carrying out dewatering conditioning treatment; (4) a sludge-water separation stage: standing and precipitating to obtain sludge precipitate, further dewatering the sludge sludge precipitate, mixing supernatant liquid with dewatered supernatant liquid, and adding the mixture as a carbon source into a biological treatment unit for recycling. Compared with the prior art, aiming at the feature of the deep physical-chemical cytolysis sludge, an appropriate chemical conditioning agent composition is used for chemically conditioning the sludge to enable the sludge to reach the requirements on recycling of the supernatant liquid and dewatering of the sludge; a method for effectively treating the excess sludge is provided.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER

Intelligent electronic lock clutch structure

The invention relates to an intelligent electronic lock clutch structure and belongs to the technical field of locks. A lock comprises a lock housing, wherein a clutch, a square connecting column at a handle, a square connecting column at a lock core, an electronic touch key, an IC (integrated circuit) card reading chip, an internal processing chip and a Wi-Fi module are arranged in the lock housing; the clutch internally comprises a housing, an electromagnet, an iron sheet, a gasket, a plastic sheet and a connecting piece; the electromagnet is sleeved with the housing, the irony gasket is arranged on the connecting piece, and the round iron sheet is arranged on the gasket; a gear is arranged on one side of the connecting piece, a groove is formed in the center of the connecting piece, and a spring is arranged in the groove; a cross-shaped guide rail is arranged on the other side of the connecting piece. According to the intelligent electronic lock clutch structure, the occlusion degree of a door handle and a lock body is controlled by electromagnetic clutching to finish unlocking and locking actions, the universality is good, the door body transformation degree is small, installation is easy, repair is convenient, hysteresis effects of motor triggering and rotation are not existent, and the effect of timely triggering of door opening action is achieved.
Owner:张泽

Passive fire prevention protection device and method for power battery pack of electric vehicle

The invention relates to a passive fire prevention protection device for a power battery pack of an electric vehicle. The passive fire prevention protection device comprises a power battery box, and an air vent valve, a cut-off valve, a pressure sensor and a control unit are arranged on the outer wall of the power battery box; the cut-off valve is connected with a vacuumizing device and a fire extinguishing agent device, and the power battery box maintains normal pressure inside; a quantitative macromolecular fire extinguishing agent is injected into the power battery box; the pressure sensor, the fire extinguishing agent device and the vacuumizing device are in signal connection with the control unit; and nitrogen, oxygen and carbon dioxide can penetrate through the air vent valve, while a macromolecular fire extinguishing agent gas can be obstructed. The safety protection measure for the power battery box of the electric vehicle has relatively high protection efficiency, specific energy of the power battery box is not reduced or is reduced as less as possible, and cost increase due to too high improvement of the IP grade of the battery box is avoided.
Owner:SHANGHAI FIRE RES INST OF THE MIN OF PUBLIC SECURITY

After-treatment device and preparation method for hollow ultrafiltration membrane wires

The invention discloses an after-treatment device and a preparation method for hollow ultrafiltration membrane wires, and belongs to the technical field of wastewater treatment. A spinning solution passes through a metering pump and is connected with a crocheting rope to become RF membrane wires, and the sixteen RF membrane wires pass through a gel tank, a sizing tank, a positive-pressure and negative-pressure cleaning tank and a vacuum drying tank and are collected by a winding drum; the winding drum is connected with middle clamping long-nose pliers, a membrane wire arranging mechanism is connected with a machine body and makes contact with the sixteen RF membrane wires, and a membrane wire payoff and collecting mechanism is connected with the membrane wire arranging mechanism and used for paying off the sixteen RF membrane wires. By means of the after-treatment device and the preparation method, early-stage preparation work for later-stage curtain formation of the hollow ultrafiltration membrane wires is completed, the membrane wire filtering efficiency of water treatment equipment is improved, the membrane wire cleaning environment is improved, the service life of the membrane wires is prolonged, and the appearance of the membrane wires treated through the water treatment equipment is made attractive.
Owner:BEIJING ORIGIN WATER FILM TECH

Potassium chloride triple-effect evaporation system capable of improving heat energy utilization rate

The invention discloses a potassium chloride triple-effect evaporation system capable of improving the heat energy utilization rate. The triple-effect evaporation system comprises a one-effect evaporator, a double-effect evaporator, a triple-effect evaporator, material rotating pumps, a mixing condenser and a liquid seal tank which are successively connected. A heat exchanger used to recover steam heat of the triple-effect evaporator is disposed between the steam outlet of the triple-effect evaporator and the steam inlet of the mixing condenser. The material liquid is communicated with the steam inlet of the triple-effect evaporator through tube passes of the heat exchanger. The steam outlet of the triple-effect evaporator is connected with the steam inlet of the mixing condenser through shell passes of the heat exchanger. The triple-effect evaporation system is advantaged by assuring heat recovery and reutilization of triple-effect steam, achieving an objective of energy conservation and emission reduction, protecting equipment from being corroded by acid steam, reducing damage of the steam to equipment and prolonging service lifetime of the equipment.
Owner:天津长芦汉沽盐场有限责任公司

Storage battery anti-theft warner

The invention relates to a storage battery anti-theft warner. The invention comprises a signal generating module and a warning module, wherein the signal generating module and a vehicle body are connected with two ends of a storage battery in parallel via a vehicle body power supply connection wire, and the warning module and the vehicle body are connected with two ends of the storage battery in parallel via the vehicle body power supply connection wire; a core is left between two modules by a power line for communication, the signal generating module is realized by an electronic coder and isconnected with the vehicle body into a whole, and the warning module is realized by a matched electronic coder and is connected with the storage battery into a whole. The storage battery anti-theft warner of the invention realizes the storage battery anti-theft and warning function; the warning module is connected with the storage battery into a whole, so that the warner is always in the warning state; once a thief pulls out or cuts off the power supply connection wire, the warner connected with the storage battery is separated from the signal generating module connected with the vehicle body,and the warner gives an alarm, which raises the alarm of passerby and deters criminals; the warner has small power consumption, can warn for a long time, has big deterrent force, has a correspondingelectronic coder and an electronic decoder and has high safety performance, convenient modification and low realization cost.
Owner:竺建康

Waste heat power generating system used in cooperation with automobile engine

The invention relates to a waste heat power generating system used in cooperation with an automobile engine. The waste heat power generating system mainly comprises the automobile engine, a cooling circulating power generation system connected with the engine, and an energy storage battery for collecting electric energy generated by the power generation system. The cooling circulating power generation system comprises a circulating pipe connected with the engine and forming a cooling liquid circulating circuit, and an electric generator connected with a power conversion device. A drainage pump, a check valve and a liquid storage tank for storing cooling liquid are arranged in the circuit of the circulating pipeline. Meanwhile, a temperature difference power generating device and a steam power generating device are arranged. By combining steam power generating and temperature difference power generating, the waste heat utilization rate is further increased; more electric energy can be produced compared with a frequently-used cooling system under the same conditions; in addition, according to the technology, only peripheral parts of the engine cooling system are refitted, refitting degree is not high, and market adaptability is high.
Owner:段峻泽

Protecting and cleaning device used for solid-state laser radar and embedded into vehicle bodies and cleaning method

The invention belongs to the technical field of vehicle-mounted sensors, and provides a protecting and cleaning device used for a solid-state laser radar and embedded into vehicle bodies and a cleaning method. The device comprises a linear motor, a windshield wiper, cleaning nozzles, a laser radar protective cover sleeve, a protective cover rotary motor, a laser radar base large platform, a laserradar protective cover, linear motor guide rails, a protective cover fixing plate and magnets. The device is suitable for the solid-state laser radar capable of being embedded into the vehicle bodies,the time when the laser radar cannot work in a stained state can be shortened, the working continuity of the sensor and the reliability of obtained data are guaranteed, solid stains are removed, thedevice is simple in structure, small in size, free of special auxiliary equipment, low in improvement degrees of the structures of fabricated vehicles, can be embedded into the vehicle bodies of mostof the vehicles, and is high in matching degree with vehicle body structures, and the integral shapes of the vehicles are guaranteed.
Owner:JILIN UNIV

Method for realizing sub-meter-level positioning through network-assisted GNSS terminal

The invention belongs to the field of mobile communication and satellite navigation, and particularly relates to a method for realizing sub-meter-level positioning through a network-assisted GNSS terminal. On the basis of a traditional positioning mode, state domain SSR correction numbers including satellite orbits, clock differences, ionized layers, code deviations and the like are transmitted tothe terminal, then the mobile terminal obtains high-precision positioning auxiliary data and carries out real-time precision single-point positioning calculation, and wide-area high-precision positioning is achieved. The method can be applied to a smart phone, a tablet personal computer, a measurement type receiver and other devices with a communication function without modifying the hardware structure of the mobile device. Compared with other methods for improving the positioning precision of the terminal, the method provided by the invention has outstanding advantages in the aspects of positioning timeliness, effectiveness, economy and the like, is low in terminal transformation degree, does not need assistance of a reference station, and has relatively great social and economic benefits and the like.
Owner:BEIHANG UNIV

In-vehicle structure of power control device

The invention discloses a vehicle-mounted structure of a power control device. The invention relates to the technical field of circuit control equipment installation. A driving motor is mounted on a machine body; a power control device is arranged in the side wall of the upper side of the driving motor shell; a connector is arranged in the lower side of the power control device; fixing mechanismsare symmetrically arranged on the side wall of the drive motor shell. Connecting mechanisms matched with the fixing mechanisms are symmetrically arranged on the side walls of the two sides of the power control device. Each fixing structure comprises a fixing plate; the fixing plate is connected to a shell of the driving motor in a welding manner, slots are symmetrically arranged in the sidewalls of the fixing plate, and threaded holes are symmetrically formed in the sidewalls of the end surfaces of the fixing plate. According to the vehicle-mounted structure of the electric power control device, excellent performance of the device shell is guaranteed, and meanwhile, interference of a bolt head used for connection to a connecting wire and a connector can be reduced.
Owner:张凤珍

High-speed cache device and data high-speed read-write terminal

ActiveCN109032966ADoes not affect high access efficiency featuresMeet the needs of special application scenariosHardware monitoringMemory systemsParallel computingMotherboard
The invention provides a high-speed cache device composed of a processor motherboard, a DDRSDRAM and a QDR SRAM. The QDR SRAM obtained by encapsulating the QDR SRAM particles based on the DIMM interface adopted by the conventional DDR SDRAM can be directly connected with the processor motherboard through the DIMM interface existing in the processor, because the difference in access efficiency to random addresses between QDR SRAM and DDR SDRAM is not directly related to the interface type, QDR SRAM does not affect the high access efficiency features, and because there is no need to change the interface type on the processor motherboard, it can bring higher access efficiency with a lower degree of transformation to meet the needs of special application scenarios such as banking. The invention also discloses a data high-speed read-write terminal provided with the cache device, which has the above beneficial effects.
Owner:ZHENGZHOU YUNHAI INFORMATION TECH CO LTD

Ammonia desulfurization process and system

The invention discloses an ammonia desulphurization process and an ammonia desulphurization system. The ammonia desulphurization process comprises the step of introducing flue gas into a desulphurization column for desulphurization through an ammonia method, wherein the flue gas is subjected to pre-cooling spraying in an inlet area of an absorption column in the desulphurization column, and a water source used in the pre-cooling spraying operation is preferably circulating water in a circulating tank of the desulphurization column. Through pre-cooling spraying operation in the inlet area of the absorption column, the situation that aerosol particles at a desulfurization outlet of an ammonia desulfurization process seriously exceed the standard is greatly relieved. According to the process,pre-cooling spraying is ingeniously carried out in the inlet area of the absorption column, the spraying water amount is controlled according to the inlet temperature and the slurry concentration ofthe absorption column, the effect is controllable, meanwhile, the transformation degree is small, the construction period is short, and cost is low.
Owner:中国能源建设集团华中电力试验研究院有限公司

Optical storage micro-grid flexible networking system for thermal power plant

The invention relates to the technical field of power transmission, in particular to an optical storage micro-grid flexible networking system for a thermal power plant. The optical storage micro-grid flexible networking system for the thermal power plant comprises a thermal power plant unit which comprises a 6kV station bus and is used for performing power transmission on a power grid system; comprising a photovoltaic-energy storage-low-voltage electrical load micro-grid unit of a 400V integrated energy bus and is used for performing power transmission on the thermal power plant unit through a soft switching unit and a voltage transformation unit; and the high-voltage side of the soft switch unit transformation unit is connected to a 6kV station service bus, and the low-voltage side of the soft switch unit transformation unit is connected to a 400V comprehensive energy bus, and is used for providing a power transmission channel when the thermal power plant unit and the photovoltaic-energy storage-low-voltage electrical load micro-grid unit carry out power transmission. According to the technical scheme, the optical storage micro-grid flexible networking system for the thermal power plant is low in equipment failure rate, flexible in control mode and high in power supply reliability.
Owner:XIAN THERMAL POWER RES INST CO LTD +1

Automatic house-leaving checking system for private house hotel application and implementation method thereof

The invention discloses an automatic house-leaving checking system for private house hotel application. The automatic house-leaving checking system comprises an electronic door locking device, an electric appliance state monitoring device, an indoor camera shooting device, a shielding device, a front-end main controller and a data management backstage, wherein the electronic door locking device is arranged on a house door body; the electric appliance state monitoring device is respectively connected with each electric appliance equipment; the indoor camera shooting device is used for acquiring image information in a house; the shielding device is arranged on the indoor camera shooting device. According to the automatic house-leaving checking system disclosed by the invention, the house-entering state and the house-leaving state of the tenant is detected by the electronic door locking device, apparent image information before and after living in the house is acquired through the indoor camera shooting device, and electric equipment state information which is difficult to perceive apparently is detected through the electric appliance state monitoring device; moreover, through uniform integration of the front-end main controller, a process that the house is checked when tenants leave the house is realized, and a whole course is monitored and detected by electric equipment and the electric equipment assists manual checking of a remote backstage, so that the house-leaving checking efficiency is greatly improved, the house rental management is greatly convenient, the management cost is reduced, and the using experience of the tenants is improved.
Owner:CHENGDU UNIV OF INFORMATION TECH +1

Small storage type double-layer stereo parking equipment with insertion-and-extraction type parking frame and control method

The invention relates to small storage type double-layer stereo parking equipment with an insertion-and-extraction type parking frame and a control method. The parking equipment is mainly composed ofa warehouse, a lifting and rotating mechanism, a travelling mechanism and a ground mechanism and further comprises a camera recognition module, an ultrasonic sensor, a human infrared sensor and an infrared aligning module or a laser aligning module mounted near wheels. Parking place layer additional arrangement is achieved through the insertion-and-extraction type comb parking frame and ground supporting columns, a storage warehouse of the comb parking frame is matched, the one-to-one limitation of an original small stereo parking device is overcome, the one-to-multiple parking place layer-additionally-arranged expansion of the small stereo parking device is achieved, the transforming extent on an original parking lot is greatly decreased, and the cost of building the stereo parking lot isreduced. The capacity of the comb parking frame in the warehouse is adjustable, the small storage type double-layer stereo parking equipment can be suitable for parking lots with different sizes in various new and old communities, the application range is wide, and operation is easy, meanwhile the cost input of building of the stereo parking lots is reduced, and the very good application and popularization prospects are achieved.
Owner:JILIN UNIV

Reservoir ecological scheduling method considering suitable growth of downstream agricultural crops

The invention discloses a reservoir ecological scheduling method considering suitable growth of downstream agricultural crops. A specific crop growth suitability model is established according to statistics of tracking and monitoring data of a specific crop growth period in a reservoir area. Then, the main drainage pipelines of the reservoir are subjected to classified transformation and control.According to the height difference between each drainage main pipe and the planting area, water pumps are installed on the corresponding low-water-level drainage main pipes, electromagnetic valves orwater pumps are installed on the high-water-level drainage main pipes, electromagnetic valves or water pumps are installed on the drainage branch pipes of the planting areas of all the reservoir areasrespectively, the opening degrees of the water pumps or the electromagnetic valves of the different drainage main pipes are controlled, and control over the water temperature and the flow of the drainage main pipes is achieved. According to the optimal temperature and humidity adjustment parameters of different growth periods of crops, different gradients and different water temperatures of the reservoir are regulated and controlled and then injected into the planting area, and then the purpose of regulating and controlling the temperature and humidity of the planting area as the growth environment is achieved. And ecological scheduling of planted crops is carried out through reservoir resources.
Owner:NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER

Application of m6A modified protein in preparation of toxoplasma gondii infection resisting medicine

The invention discloses an application of m6A modified protein in preparation of a toxoplasma gondii infection resisting medicine, and belongs to the field of molecular biology. The application achieves the purpose of resisting toxoplasma gondii infection by regulating the expression level of the m6A modified protein and regulating the expression of an inflammatory factor TNF-alpha. The invention finds that m6A modification sites exist on human TNF-alpha mRNA, after toxoplasma gondii infection, the modification degree of the modification sites on the TNF-alpha mRNA can be reduced by up-regulating expression of demethylase FTO, and degradation of the TNF-alpha mRNA is reduced and TNF-alpha expression is induced under the help of recognition protein YTHDF2. From the perspective of m6A methylation modification for the first time, the invention discloses a molecular mechanism of TNF-alpha expression induced by toxoplasma gondii infection, and changes of m6A modification sites and modification levels on TNF-alpha after human macrophages are infected by toxoplasma gondii, and clarifies a mechanism of regulating TNF-alpha expression by m6A modification.
Owner:NANJING MEDICAL UNIV

Ultrathin electronic glass forming device and forming method

The invention discloses an ultrathin electronic glass forming device and a forming method. The ultrathin electronic glass forming device comprises a forming slot, a forming medium feeding system, a detection control device, a heating device and a forming edge roller, wherein the forming slot is divided into a high-temperature forming section and a low-temperature forming section in turn along the length direction of the forming slot and the running direction of the glass liquid; to-be-formed glass liquid is placed above the forming slot; a pothook is arranged at the upper part in the forming slot; a two-layer forming medium mixer is fixed and locked on the pothook; a plurality of purging devices and a water draining valve are arranged at the bottom in the forming slot; and vent valves used for releasing pressure are arranged on the two sides of the forming slot. The forming device and the forming method can be used for achieving the following objectives: (1) the thickness of the electronic glass after once forming is below 0.5mm; (2) the electronic glass can meet various stipulations in national standards and can meet the subsequent processing use requirements; and (3) the forming process is nontoxic and pollution-free, and meanwhile, the forming medium is low in cost.
Owner:QINHUANGDAO GLASS IND RES & DESIGN INST

Special Signal Light Control System at Tram Crossing

A signal lamp control system special for a tramcar intersection comprises vehicle-mounted GPS devices, a central data server, a special signal lamp control system, speed indication boards and trigger areas. After tramcars enter the trigger areas, the signal timing of special signal lamps is calculated by the central data server according to the geographical positions of the tramcars and suggested running speeds on the speed indication boards, and is sent to a special signal lamp control server. The central data server renews the signal timing in real time till the tramcars are driven away from the trigger areas. The special signal lamp control server analyzes signal timing information after receiving the signal timing information sent by the central data server; if the signal timing information and the phase positions of transverse social traffic lights do not conflict, the tramcars are allowed to pass through the intersection, and signal timing instructions are sent to the special signal lamps; if the signal timing information and the phase positions of the transverse social traffic lights conflict, vehicles are released by the transverse social traffic lights or the time during which the vehicles are released by the transverse social traffic lights is shortened, and signal timing instructions are sent to the special signal lamps in a delayed mode.
Owner:CRRC NANJING PUZHEN CO LTD

A kind of recovery and utilization method of carnallite liquid in the production of potassium chloride

The invention discloses a recycling method for a carnallite post-throwing liquid in production of potassium chloride. The recycling method comprises the following steps: after separating carnallite which is settled by a carnalite settler by a centrifugal machine, washing the solid in a trough and conveying the solid to a speed control crystallizer; buffering the post-throwing liquid by virtue of a post-throwing liquid tank, conveying the post-throwing liquid to a post-throwing liquid settler and conveying a salt slurry which is settled by the post-throwing liquid settler to a high-temperature salt dosing step for production of industrial refined salt and magnesium sulfate monohydrate; and conveying an overflowing liquid in the upper layer by using the post-throwing liquid settler and the carnalite settler to an industrial bromine production step for production of industrial bromine. According to the method disclosed by the invention, the quality of a carnallite product in production of potassium chloride is improved, so that the content of potassium chloride in the carnallite product is reduced, the water consumption in a decomposing and washing step is reduced, the washing yield of potassium chloride is improved, the loss of potassium chloride in the washing process is avoided, and meanwhile, the potassium chloride product is improved, so that the targets of improving the quality and reducing the consumption are achieved.
Owner:天津长芦汉沽盐场有限责任公司

Power plant production region weather data acquisition method, system, equipment and medium

The invention provides a power plant production region weather data acquisition method, system, equipment and medium, weather forecast data from an internet region is transmitted to a production region through a reverse gatekeeper after format conversion and certificate encryption, and then certificate verification and decryption are performed, so that secure interaction of internal and external network data can be realized, and the safety of the data is improved. And the potential safety hazard during data interaction is greatly reduced. Operators in a large production area can adjust boiler output in time according to real-time weather data, energy conservation and emission reduction are achieved, economic benefits are improved, and the goals of carbon peak reaching and carbon neutralization are promoted. The method has high application value in the actual production process of a thermal power plant, and has the potential of large-scale popularization and application.
Owner:XIAN THERMAL POWER RES INST CO LTD

Key value data processing method and device, electronic equipment and storage medium

The invention relates to a key value data processing method and device, electronic equipment and a storage medium. The method comprises the steps that a to-be-processed task and meta information corresponding to the to-be-processed task are acquired; the to-be-processed task is processed through the mapping task in the calculation engine to obtain key value data, the key value data are transmitted to shuffling processing nodes, and the shuffling processing nodes are nodes independently packaged outside the calculation engine; and running sorting logic corresponding to the meta-information through the shuffling processing node so as to sort the key value data. According to the scheme provided by the invention, the key value data generated by various calculation engines are processed by adopting a general sorting mechanism, so that the sorting requirements of the key value data of the various calculation engines can be met at the same time.
Owner:BEIJING DAJIA INTERNET INFORMATION TECH CO LTD

A kind of oxidized hydroxypropyl carboxymethyl starch slurry and preparation method

The invention discloses an oxidized hydroxypropyl carboxymethyl starch slurry material which is prepared from following raw materials, by weight: 95-105 parts of corn starch, 3-15 parts of urea, 160-200 parts of an ethanol water solution, 2-10 parts of sodium hydroxide, 5-40 parts of propylene epoxide, 0.1-2 parts of H2O2 and 5-10 parts of chloroacetic acid. The preparation method includes following steps: adding the corn starch and the urea to the ethanol water solution; adding the sodium hydroxide to perform an alkalization reaction; adding the propylene epoxide after the alkalization reaction is finished to perform an etherification reaction; adding the H2O2 after the etherification reaction is finished to perform an oxidizing reaction for 55-65 min; adding the chloroacetic acid after the oxidizing reaction is finished; increasing the temperature to 65-75 DEG C and carrying out a reaction for 125-135 min; decreasing the temperature after reaction is finished; and washing, suction-filtering, air-drying and crushing the reaction product to obtain the slurry material. By means of the hydroxypropyl groups introduced into starch, the macromolecules in starch particles can fully swell, dissolve and expand when fully absorbing water. Meanwhile, the slurry material is good in viscosity stability, is transparent and is excellent in flowability.
Owner:ZHONGYUAN ENGINEERING COLLEGE

Method and system for hiding reversible information of dual-channel audio based on two-dimensional histogram

The invention discloses a method and system for hiding reversible information of a dual-channel audio based on two-dimensional histogram. The method comprises the following steps of: acquiring reversible information and a dual-channel audio file; respectively calculating a prediction error value of a left channel and a prediction error value of a right channel for elements at the same position of different sound channels; constructing a prediction error pair based on the prediction error value of the left channel and the prediction error value of the right channel; constructing a prediction error histogram based on the prediction error pair; and adaptively moving the prediction error histogram, and embedding the reversible information to obtain a dual-channel audio with hidden reversible information. According to the invention, the modification degree of an original sample due to the embedded information is reduced while an embedding capacity is improved. Experiments show that compared with an existing embedding method, the method has better embedding performance in the aspects of audio fidelity and capacity under the same capacity.
Owner:QILU UNIV OF TECH

A quick connection device for a radio frequency card reader and its use method

The invention discloses a radio frequency card reader quick connection device used for supporting the operation of an electric energy meter calibrating apparatus. The radio frequency card reader quick connection device comprises a guide rod for the plug-in connection of an electric energy meter calibrating apparatus holder, and a guide rod U-shaped slot for the fixation of a radio frequency card reader. The guide rod U-shaped slot is fixedly connected with the guide rod. The invention also discloses the application method of the above device. The method comprises the steps of punching at least one profiled guide slotted hole besides the location of the electric energy meter calibrating apparatus, adjusting the guide rod to be at a desired installation depth, driving a position-limiting piece to slide downwards into a guide rod clamping slot, tightening screws, stabilizing the guide rod, placing the radio frequency card reader in the guide rod U-shaped slot, locking the radio frequency card reader and fixing the radio frequency card reader, wherein the guide rod can radially slide inside the guide slotted hole and cannot rotate. According to the technical scheme of the invention, only the electric energy meter calibrating apparatus holder needs to be modified, so that the modification operation is smaller in degree and easy to implement. The cost is lower. Meanwhile, the radio frequency card reader quick connection device is simple in structure, so that the installation and the operation of radio frequency card readers are facilitated. Therefore, the calibrating efficiency of the electric energy meter calibrating apparatus is greatly increased.
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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