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31results about How to "Change number" patented technology
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Miniature needle array for medicine transmission and its making process
ActiveCN1986011ASimple preparation processImprove adhesionFixed microstructural devicesVolume/mass flow by thermal effectsPharmacy medicineMedicine
The present invention relates to a kind of miniature needle array for medicine transmission, and features that the miniature needle in the array is non-planar solid miniature needle comprising a needle tip for piercing live animal skin, a needle body for increasing the pierced depth, and a base for stabilizing the array and preventing breaking and residue in the skin of miniature needle. The miniature needle array is changeable in the base number, the miniature needle number, the 3D structure of the needles, needle tip interval, needle tip height and the needle tip inclination for practical requirement. The miniature needle array is made through MEMS and polymer-MEMS combining process, in which only one mask is used for twice photo etching to form the needle tips and the needle bodies of the miniature needles. The present invention is used for vaccine and medicine transmission through micropores formed with the solidified hydrogel.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
Circular thermopile temperature sensor
InactiveCN1352381AFlexible time constantCompact structureThermometers using electric/magnetic elementsUsing electrical meansEngineeringTime constant
An annular thermobile temperature sensor includes thermopiles-comprised thermocouples. The present invention features that one large ring and one small ring with homogeneously distributed slots in the same number of fix thermocouples connected into annular thermopile via insulating material to constitute one thermopile unit; and several thermopile units are laminated and serially connected to form the annular thermopile temperatur sensor. The temperature sensor (thermpile) and the reaction pond are designed as replaceable ones, the number of thermocouples to constitute one thermopile may be altered easily, and the time constant of the calorimeter may be regulated flexibly to meet the need of different reactions.
Owner:WUHAN UNIV
Premixed combustion gas burner having separated fire hole units
InactiveUS6918759B2Avoid deformationChange numberPilot flame ignitersGaseous fuel burnerThermal expansionEngineering
A premixed combustion gas burner having separated fire hole units including a tube-shaped burner whose front face is opened and inner portion is of a hollow tubular shape so that the whole fire hole units of the burner can be separated to thus prevent deformation due to thermal expansion, in which fire hole units each having a number of fire holes formed at a predetermined distance from one another are disposed in both edge lines and the inner portion on the upper end face, and loaders each having a predetermined space are formed between the fire hole units; and a plate-shaped burner which is made of a plate-shaped material having a pin structure formed on the bottom thereof so as to be mounted on the loaders formed in the tube-shaped burner, in which fire hole units having a number of fire holes formed at a predetermined distance are disposed in the form of a slit along both the edge lines of the upper end face. Here, the number of fire holes forming the fire hole units of the tube-shaped burner and the plate-shaped burner are formed with a uniform size by a press, and a cooling water tube is disposed to penetrate the fire holes through fitting holes formed on the lateral surface of the tube-shaped burner and fitting holes formed on the pin-structure formed on the bottom of the plate-shaped burner, in correspondence to the fitting holes of the tube-shaped burner.
Owner:KYUNGDONG NAVIEN
Method and system for reducing lock occurrences in server/database systems
InactiveCN103793455AImprove performanceReduce the numberRelational databasesProgram controlDatabaseServer
Owner:INT BUSINESS MASCH CORP
Bovine colostrum composite powder
PendingCN111990463ASmall molecular structurePromote digestion and absorptionMilk preparationBiotechnologyPhospholipid
The invention discloses a bovine colostrum composite powder. The powder comprises the following components in parts by weight: 15-20 parts of soybean protein isolate powder, 3.1-3.8 parts of phospholipid powder, 15-19.21 parts of whey protein concentrate powder, 15.7-18.37 parts of whey protein isolate powder, 1.57-2.15 parts of bovine colostrum powder, 2.81-4.13 parts of marine fish oligopeptidepowder, 6.27-7.92 parts of inulin, 9-11.5 parts of maltodextrin, 9.9-13.2 parts of flaxseed oil microcapsule powder, 8.8-12.65 parts of fructo-oligosaccharide and 0.048-0.072 part of stevioside, wherein the flaxseed oil microcapsule powder comprises flaxseed oil, galactooligosaccharide, modified starch, silicon dioxide, monoglycerol fatty acid ester, diglycerol fatty acid ester and sodium ascorbate. According to the bovine colostrum composite powder disclosed by the invention, the four proteins of the whey protein isolate powder, the whey protein concentrate powder, the marine fish oligopeptide and the soybean protein isolate powder are combined for use, animal and plant proteins have a synergistic effect, various nutrient substances required by a human body can be comprehensively supplemented, the human body is helped to synthesize more immune globulins, and the composite powder directly supplements the immune globulins with the bovine colostrum powder, and helps chronic patients andpostoperative patients to improve the immunocompetence.
Owner:SHANGHAI TIANLONG BIOTECH CO LTD
Active-inverter-based offshore wave energy grid-connected power generation system and control method
ActiveCN105927460AEnergy savingAlleviate energy tensionSingle network parallel feeding arrangementsMachines/enginesPower gridPower flow
The invention discloses an active-inverter-based offshore wave energy grid-connected power generation system and a control method. The system comprises a wave energy collection device, a power generation device, an electric energy conversion circuit and a detection control circuit, wherein the wave energy collection device comprises a plurality of wave energy collection units which are connected, a common transmission shaft of the wave energy collection units is connected with a gear box, and the wave energy collection device is used for converting wave energy into mechanical energy; the power generation device is used for converting the mechanical energy into electric energy; the electric energy conversion circuit comprises a rectification circuit and an inverter circuit and used for achieving inversion grid connection of electric energy and regulating the grid connection output power, and the output end of the electric energy conversion circuit is connected with a power grid; the detection control circuit is used for detecting various parameters of the system during operating and controlling the system. According to the system, the modular wave energy collection device is used for converting wave energy into mechanical energy which is converted into the electric energy finally; through coordinate-transformation-based current control, inversion grid-connected operation under unity power factors is realized; and meanwhile, through a maximum power point tracing algorithm, the system operates in a maximum power output state all the time, and the wave energy is utilized to the maximum extent.
Owner:WUHAN UNIV OF TECH
Key inputting device and telecontrol sending machine with this device
InactiveCN1862458AChange numberChange positionInput/output for user-computer interactionElectric switchesMicrocomputerProgrammable read-only memory
The present invention provides a key input device capable of manufacturing key input devices with different specifications in a short time only by changing the printed pattern of a keyboard conversion part (3). A plurality of movable side leads (7) and fixed side leads (9) printed on the flexible film substrate (5) of the keyboard conversion part (3) are connected to the microcomputer (2) correspondingly. A plurality of signal pins, and detects a pressed key (12) by connecting a set of movable side leads (7) and fixed side leads (9). The layout of the key (12) can be changed only by changing the printed pattern. In addition, even if the corresponding connection relationship with the signal pin is different, the control program that matches the detection action of the key (12) can be written into the programmable only The memory (4) is read and the pressed key (12) is detected.
Owner:SMK CO LTD
Method for generating dozens of megampere pulse currents and z-pinch direct drive source
ActiveCN106098298AReduce current lossReduce design difficultyMagnetic-bias transformersFixed transformersEngineeringElectrical impulse
The invention provides a method for generating dozens of megampere pulse currents and a z-pinch direct drive source. The drive source comprises a primary pulse power source (thousands of fast discharge branch circuits are connected in parallel), a high-voltage transmission cable, a water medium electromagnetic induction chamber, a secondary MITL (Magnetically Insulated Transmission Line) and a z-pinch load, wherein the secondary MITL is formed by connecting multi-stage induction chambers in series; the z-pinch load is located on an axis; thousands of primary discharge branch circuits are located at the peripheries of the induction chambers and are divided into dozens of groups; the primary discharge branch circuits discharge rapidly to directly obtain an electric pulse with a leading edge of 100-200 ns, a voltage of 100-200 kV and a current of 30-50 kA. Currents of the thousands of branch circuits are transmitted and gathered on cable interfaces, which are uniformly distributed at the peripheries of the induction chambers, of dozens of I-shaped tri-plate transmission lines through the cable; the currents are gathered to the induction chambers for primary excitation through the tri-plate transmission lines; and the current gathering is realized through electromagnetic induction. Multi-stage induction chambers are connected in series to form an IVA (Induction Voltage Adder); the MITL is employed for a secondary stage of the IVA to realize voltage superimposition and power transmission; an ultra-high power electric pulse with a voltage of dozens of MV, a current of dozens of MA and a leading edge of 100-200 ns is generated on the Z-pinch load of the axis, and the requirement of a drive current of a Z-pinch ICF (Inertial Confinement Fusion) is met.
Owner:NORTHWEST INST OF NUCLEAR TECH
Ultraviolet cathode ray light source
InactiveCN106409647AChange numberAdjustable powerLuminescent screen lampsField emission deviceUltraviolet lights
The present invention discloses an ultraviolet cathode ray light source. The ultraviolet cathode ray light source comprises an electron emission device, an electron multiplier, an electric field, a magnetic field, a high-reflective film, a luminous chip, an ultraviolet light antireflection film and a light outlet window. The luminous chip gives out light through electron excitation. The electrons emitted by the electron emission device pass through the electron multiplier, the electric field, the magnetic field and the high-reflective film to enter the luminous chip to excite the luminescence of the luminous chip, the light ray is emitted from the light outlet window, and the electron emission device is a field emission device and a heat emission device. The ultraviolet cathode ray light source realizes the purpose that the power and the light beam size of the cathode ray ultraviolet source can be adjusted.
Owner:DONGGUAN INST OF OPTO ELECTRONICS PEKING UNIV
Plate type heat exchanger
InactiveCN108571908AChange heat transferImprove efficiencyStationary plate conduit assembliesEngineeringChange positions
The invention relates to a plate type heat exchanger. A plurality of heat exchange plates are uniformly distributed in parallel between a front fixed plate and a rear moveable plate; a support columnfor supporting the rear moveable plate is connected with the rear moveable plate; an upper guide rod is mounted at the upper ends of the heat exchange plates; a lower guide rod is mounted at the lowerends of the heat exchange plates; the front fixed plate, heat exchange plates and the rear moveable plate are connected in a fastened manner through clamping bolts; a hot fluid inlet tube and a coldfluid outlet tube arranged in parallel are arranged at the upper ends of the front fixed plate and the heat exchange plates; a hot fluid outlet tube and a cold fluid inlet tube arranged in parallel are arranged at the lower ends of the front fixed plate and the heat exchange plates; the hot fluid inlet tube, the cold fluid outlet tube, the hot fluid outlet tube and the cold fluid inlet tube can bemoved along corresponding connecting holes in the front fixed plate and the heat exchange plates. The number of the heat exchange plates can be adjusted by changing positions of the hot and cold fluid inlet / outlet tubes in heat exchange, furthermore heat exchange areas can be changed, and the purpose of changing heat can be achieved.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Improved particle swarm optimization-based economic load dispatching method for power system
InactiveCN105552905AChange numberEconomic load distribution optimizationLoad forecast in ac networkForecastingElectric power systemImproved algorithm
The invention provides an improved particle swarm optimization-based economic load dispatching method for a power system, relates to the technical field of power systems, and aims at solving the technical problem of optimization of economic load dispatching of the power system. According to the method, a swarm management rule is introduced into a particle swarm optimization algorithm to form an effective swarm utilization strategy-based particle swarm algorithm; the quantity of particles is effectively changed through a global optimal value change of the swarm; the improved algorithm is high in convergence rate; and the convergence precision is high. The method provided by the invention is applied to economic load dispatching of the power system comprising different units, achieves performance improvement of economic load dispatching of the power system and obtains a good optimization effect.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
Performance system with multi-projection environment
The present invention provides a performance system with a multi-projection environment including a stage installed for a performance and a plurality of projection surfaces arranged around the stage and arranged so as not to be parallel to each other, in which synchronized images are projected on the plurality of projection surfaces.
Owner:CJ CGV
Ship wharf truck queuing length estimation method, system and equipment and medium
PendingCN111310342ASolve the queuing problemImprove estimation accuracyGeometric CADSustainable transportationTruckComputational model
The invention discloses a ship wharf truck queuing length estimation method, system and device and a medium, and the method comprises the steps: obtaining a queuing length calculation model of a truckqueuing queue in a stable state according to the service window utilization rate of a to-be-estimated ship wharf and an M / M / S queuing model; modeling the truck queuing queue forming process to obtaina regression model of the queuing queue forming state; modeling the truck queuing queue dissipation process to obtain a regression model of the queuing queue dissipation state; judging whether the service window utilization rate at the current moment is greater than a set threshold value or not, if so, indicating that the service window is in a supersaturated state, and estimating the queue length by using a fluid flow equation; and if not, indicating that the service window is in an unsaturated state, comparing the estimated length of the queuing queue at the previous moment with the queuinglength of the truck queuing queue in a stable state at the current moment, and selecting a corresponding calculation model to estimate the length of the queuing queue according to a comparison result.
Owner:QILU UNIV OF TECH
Dual clutch transmission
InactiveCN101802452AChange settingsLess componentsToothed gearingsTransmission elementsCouplingEngineering
Owner:ZF FRIEDRICHSHAFEN AG
Method for preparing unsaturated fatty acid plant sterol ester using alpha-linolenic acid as main component
InactiveCN102584931AImprove intelligenceSuppress allergic reactionsFatty acid esterificationSteroids preparationHas active ingredientDissolution
The invention discloses a method for preparing an unsaturated fatty acid plant sterol ester using alpha-linolenic acid as a main component. The method comprises the following steps of: 1, performing alcoholysis reaction by using linseed oil and lower fatty alcohol as raw materials to prepare an unsaturated fatty acid methyl ester and a methyl stearate which use alpha-linolenic acid as main components; 2, performing ester exchange reaction by using a plant sterol ester and the unsaturated fatty acid methyl ester and the methyl stearate which use the alpha-linolenic acid as the main components as raw materials to prepare crude unsaturated fatty acid plant sterol ester; and 3, adding activated clay into the crude unsaturated fatty acid plant sterol ester, reacting with stirring, filtering, then collecting filtrate, extracting, separating the lower oil layer, adding methanol for washing, drying, and thus obtaining the unsaturated fatty acid plant sterol ester using the alpha-linolenic acid as the main component. The unsaturated fatty acid plant sterol ester can solve the problems of poor dissolution in water and grease and low activity of free plant sterol esters, has active ingredients of the alpha-linolenic acid, and has strong medicinal and health-care functions.
Owner:西安蓝天生物工程有限责任公司
Modular press convenient for self-recombination
PendingCN111398031AChange numberChange directionMaterial strength using tensile/compressive forcesPressesControl engineeringControl cell
The invention discloses a modular press convenient for self-recombination, which comprises a porous platform, a driving module and an acquisition and control unit, wherein the driving module is mounted on the porous platform, a driving end of the driving module is used for applying pressure to an experimental sample from different directions, and the acquisition and control unit is connected withthe driving module through using an acquisition and control cable. According to the modular press machine for rapid self-recombination, a frame and a loading module are separated, a user is allowed toconveniently change the number and direction of loading shafts and change the size and shape of a loading region according to the research requirement of the user, and the maximum degree of freedom is provided. Therefore, a user can customize and modify a press belonging to the user just like building blocks.
Owner:INST OF GEOLOGY CHINA EARTHQUAKE ADMINISTRATION
Method for changing morphological characteristics of stems, leaves and flowers of plant, and application
PendingCN113912687AGood economic valueChange numberPlant peptidesGenetic engineeringEndonucleaseSpectinomycine
The invention discloses a method for changing the morphological characteristics of the stems, the leaves and the flowers of a plant, and application, and relates to the technical field of plant cultivation. The method disclosed by the invention comprises the following steps of cloning a gene BjuB033714 in Brassica juncea var. tumidaTsen etLee, and constructing an overexpression vector which takes CAMV35S as a promoter by taking pTF101 as a target vector and taking BamH I and Sma I as restriction enzyme cutting sites; taking the whole genome cDNA of the Brassica juncea var. tumidaTsen etLee as a template, and amplifying the CDS sequence of BjuB033714 by adopting a PCR method; carrying out electrophoresis on the amplified BjuB033714 gene, and amplifying a product fragment by utilizing the recovered BjuB033714 gene; carrying out multiplication culture on a single colony which is positive in PCR amplification by using an LB liquid culture medium of 100mu g / mL spectinomycin, and extracting plasmids; and performing double enzyme digestion on the extracted plasmids by using restriction enzymes Sma I and BamH I to identify whether the vector is successfully constructed or not. The invention discloses a method capable of changing the morphological characteristics of the stems, the flowers and the like of the plant, can be used for cultivating high-quality ornamental plant varieties or new crop varieties, including ornamental flower varieties and commercial crops, and has a remarkable economic value.
Owner:YANGTZE NORMAL UNIVERSITY
IaaS-based time-sharing method and system for pre-order instances of uncertain demand services
ActiveCN109859012BOptimizing Demand Servicing CostsChange numberResource allocationApparatus for meter-controlled dispensingUser needsTime-sharing
Owner:SHANDONG UNIV
2.4/5.8GHz dual-frequency MIMO (Multiple Input Multiple Output) omnidirectional antenna
ActiveCN102064383BChange numberTo achieve the effect of horizontal radiationSimultaneous aerial operationsRadiating elements structural formsElectrical conductorMultiple frequency
Owner:KENBOTONG TECH
2.4/5.8GHz dual-frequency MIMO (Multiple Input Multiple Output) omnidirectional antenna
ActiveCN102064383AChange numberTo achieve the effect of horizontal radiationSimultaneous aerial operationsRadiating elements structural formsElectrical conductorMultiple frequency
The invention discloses a 2.4 / 5.8GHz dual-frequency MIMO (Multiple Input Multiple Output) omnidirectional antenna comprising an antenna cover consisting of an antenna bottom cover, an antenna sheath and a top cover. A metal bar longitudinally passes through the axial line of the antenna so as to tightly pull the antenna bottom cover, the antenna sheath and the top cover into a whole. The 2.4 / 5.8GHz dual-frequency MIMO omnidirectional antenna is characterized in that a plurality of microstrip plates with different frequencies in a shell are alternatively and uniformly distributed on the same one circumference, each microstrip plate consists of a medium substrate, a guide belt and a ground line, and the guide belt and the ground line are symmetrically and reversely arranged on two surfaces of the medium substrate, and are also respectively integrated with an inner conductor and an outer conductor of a coaxial connector. The invention breaks through the limitation of single frequency of the traditional omnidirectional antenna, and overcomes the shortages of high machining and debugging difficulties, high cost and the like; and the alternatively and uniformly distributed microstrip plates realizes the multiple frequencies coexistence; meanwhile, the invention exceeds the normal omnidirectional antenna in the aspects of bandwidth and gain. The invention has simple process and is beneficial to the batch production due to the plane PCB (Printed Circuit Board) structure.
Owner:KENBOTONG TECH
Circular thermopile temperature sensor
InactiveCN1162690CCompact structureSimple structureThermometers using electric/magnetic elementsUsing electrical meansThermopileEngineering
An annular thermobile temperature sensor includes thermopiles-comprised thermocouples. The present invention features that one large ring and one small ring with homogeneously distributed slots in the same number of fix thermocouples connected into annular thermopile via insulating material to constitute one thermopile unit; and several thermopile units are laminated and serially connected to form the annular thermopile temperatur sensor. The temperature sensor (thermpile) and the reaction pond are designed as replaceable ones, the number of thermocouples to constitute one thermopile may be altered easily, and the time constant of the calorimeter may be regulated flexibly to meet the need of different reactions.
Owner:WUHAN UNIV
Bionic miniature multi-body airship motion system
ActiveCN111498080AImprove environmental adaptabilitySlim shapeRigid airshipsGas-bag arrangementsControl systemMotion system
The invention provides a bionic miniature multi-body airship motion system. The system comprises a plurality of airships connected in sequence and a control system, the airship comprises an air bag and an air bag support. The air bag suppport is arranged outside the air bag and used for supporting the air bag; a rolling mechanism is arranged on the air bag; the adjacent airships are connected through a swing mechanism; the swing mechanism comprises a swing base, a swing arm, a first connecting support and a second connecting support. A second driving source for driving the swinging arm to swing relative to the swinging base is arranged on the swinging base; a detection card is arranged on the swing arm; an infrared sensor for detecting the passing of the detection card is arranged on the swinging base, the first connecting support is connected with the swing base and one airship, the second connecting support is connected with the swing arm and the other airship, the control system comprises a controller, a driver, a controller and an infrared sensor, the first driving source and the second driving source are connected, the appearance imitates snakes, the body is thin and long, andthe control system can be bent and can pass through a complex indoor environment.
Owner:WUHAN UNIV OF TECH
Method for assembling a clutch arrangement to a flywheel in a drive chain of a vehicle and assembling equipment therefor
InactiveCN1796824BAvoid imbalanceGood weight balanceRotating vibration suppressionStatic/dynamic balance measurementFreewheelEngineering
The invention discloses a method for assembling a clutch device on a flywheel in a vehicle drive unit, wherein, the flywheel and the clutch device are individually balanced and aligned by means of a positioning device relative to obtained imbalance respectively and positioned each other in the circumferencial direction. Moreover, the invention discloses an assembling device for assembling a balanced clutch device on a balanced flywheel in a vehicle drive unit axially, which includes at least one positioning device for positioning the clutch device on the flywheel, the positioning device comprises at least one group of heaves and at least two grooves related to the group respectively.
Owner:SCHAEFFLER TECH AG & CO KG
Miniature needle array for medicine transmission and making process thereof
ActiveCN100460028CSimple preparation processImprove adhesionVolume/mass flow by thermal effectsFixed microstructural devicesBiomedical engineeringBase Number
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
Knitting machine electromagnetic needle selection machine drive plate and knitting machine electromagnetic needle selection machine
The invention provides a knitting machine electromagnetic needle selection machine drive plate and a knitting machine electromagnetic needle selection machine. The knitting machine electromagnetic needle selection machine drive plate comprises a processor module, an address button module, a receiving and dispatching module, an output module and a power module. The address button module is electrically connected with the processor module to change the number of the knitting machine electromagnetic needle selection machine drive plate through buttons; the knitting machine electromagnetic needleselection machine comprises an electromagnetic coil, the knitting machine electromagnetic needle selection machine drive plate, a first adapter plate and a second adapter plate; the electromagnetic coil is provided with two ends; the first adapter plate is connected with the knitting machine electromagnetic needle selection machine drive plate; the second adapter plate is connected with the firstadapter plate; the first adapter plate and the second adapter plate are respectively connected with the two ends of the electromagnetic coil. The knitting machine electromagnetic needle selection machine drive plate can simply and efficiently change the numbers, and the integration level of the knitting machine electromagnetic needle selection machine is higher.
Owner:HANGZHOU XUREN TEXTILE MACHINERY
A method for generating tens of megaamperes pulse current and z-pinch direct drive source
ActiveCN106098298BReduce current lossIncrease the output voltage amplitudeMagnetic-bias transformersFixed transformersEngineeringHigh pressure
The invention provides a method for generating dozens of megampere pulse currents and a z-pinch direct drive source. The drive source comprises a primary pulse power source (thousands of fast discharge branch circuits are connected in parallel), a high-voltage transmission cable, a water medium electromagnetic induction chamber, a secondary MITL (Magnetically Insulated Transmission Line) and a z-pinch load, wherein the secondary MITL is formed by connecting multi-stage induction chambers in series; the z-pinch load is located on an axis; thousands of primary discharge branch circuits are located at the peripheries of the induction chambers and are divided into dozens of groups; the primary discharge branch circuits discharge rapidly to directly obtain an electric pulse with a leading edge of 100-200 ns, a voltage of 100-200 kV and a current of 30-50 kA. Currents of the thousands of branch circuits are transmitted and gathered on cable interfaces, which are uniformly distributed at the peripheries of the induction chambers, of dozens of I-shaped tri-plate transmission lines through the cable; the currents are gathered to the induction chambers for primary excitation through the tri-plate transmission lines; and the current gathering is realized through electromagnetic induction. Multi-stage induction chambers are connected in series to form an IVA (Induction Voltage Adder); the MITL is employed for a secondary stage of the IVA to realize voltage superimposition and power transmission; an ultra-high power electric pulse with a voltage of dozens of MV, a current of dozens of MA and a leading edge of 100-200 ns is generated on the Z-pinch load of the axis, and the requirement of a drive current of a Z-pinch ICF (Inertial Confinement Fusion) is met.
Owner:NORTHWEST INST OF NUCLEAR TECH
Method and system for reducing the occurrence of locking in a server/database system
InactiveCN103793455BImprove performanceReduce the numberRelational databasesProgram controlDatabaseServer
The invention relates to a computer-implemented method for limiting the number of concurrent requests in a database system, said method comprising the steps of: queuing requests to be processed by said database system in at least one queue (10); The maximum value (SS) of concurrent requests of said at least one queue (10); monitoring at least one queue utilization parameter corresponding to said at least one queue (10), and calculating a performance value (PF ); dynamically adjust the maximum value (SS) of concurrent requests of the at least one queue based on the performance value (PF), so as to improve system performance, and dynamically limit the at least one queue based on the dynamically adjusted maximum value (SS). The number of concurrent requests for the queue (10).
Owner:INT BUSINESS MASCH CORP
Method and device for reducing refrigerant flow noise in multi-connected system
ActiveCN109899927BReduce flow noiseSpeed up the flowMechanical apparatusNoise suppressionControl engineeringProcess engineering
The invention discloses a method and device for reducing refrigerant flow noise in a multi-connected system, wherein the multi-connected system includes a first bypass valve, a second bypass valve and a refrigerant throttling valve. obtain the starting capacity of the indoor unit; and control the first bypass valve, the second bypass valve and the refrigerant throttle valve according to the running horsepower of the indoor unit or the starting capacity of the indoor unit. Thus, the first bypass valve, the second bypass valve, and the refrigerant throttling valve are controlled according to the number of indoor units running or the capacity of the indoor unit to change the number of refrigerant outlet flow paths, thereby promoting the flow of refrigerant and increasing the The uniformity of refrigerant flow reduces the noise of refrigerant flow in multi-connected systems.
Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
Rock drilling tool
InactiveCN1274940CGood transportabilityReduce friction lossDrill bitsWorkpiecesEngineeringSupport surface
Disclosed is a drilling tool, more particularly a rock drilling tool (1), for rotational and / or percussive drilling. In order to improve the drilling characteristics of said tool, the bore dust removal groove (7) is subdivided into at least two removal groove segments. Each segment comprises a bore dust support surface. As shown in the figure, a so-called side rod (13) is located inside the removal groove (7). Said side rod (13) basically represents a reduced embodiment of the main rod (8). The removal groove (7) with height h2 is subdivided by height h4 and a top groove segment (15) with height h5. The rod height of the side rod (13) is identified with h8. The outer back surface of the side rod (13) is defined by reference number (22). The external diameter of the outer back surface (22) is identified with d3.
Owner:HAWERA PROBST
A kind of preparation method of nanoscale supported molybdenum sulfide catalyst
ActiveCN109465018BGuaranteed decentralizationHigh activityCatalyst activation/preparationNanotechnologyPtru catalystReaction temperature
The invention discloses a nanoscale loaded molybdenum sulfide (MoS 2 ) The preparation method of the catalyst. The invention includes the following steps: disperse / dissolve a certain amount of carrier, molybdenum source and sulfur source in deionized water, and stir after ultrasonic dispersion to obtain a suspension; add an appropriate amount of reducing agent and stir evenly; regulate the molybdenum source, sulfur source and The type of carrier; place the prepared solution or suspension in a closed stainless steel reaction kettle, control the reaction temperature at 120-200°C, and the reaction time is 3-36h; after the reaction is completed, cool, filter, wash, and dry to obtain Nanoscale supported MoS 2 catalyst. The synthesis method of the present invention has the advantages of mild conditions, simple operation and high yield, and the prepared nano-scale supported MoS 2 The catalyst has high active site exposure rate and high dispersion. The method of the present invention synthesizes nanoscale loaded MoS 2 The catalyst is used in the field of oil catalytic hydrogenation with extremely high catalytic hydrogenation activity.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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