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Dictionary updating method and apparatus
ActiveCN105389349AAutomate processingReduce replacement costsSpecial data processing applicationsSpeech recognition
Provided are dictionary updating method and apparatus. The dictionary updating method comprises: performing preprocessing on a received corpus to obtain text data; performing line segmentation on the text data to obtain sentence data; performing word segmentation on the sentence data according to individual words contained in a basic dictionary, so as to obtain word data after word segmentation; performing combination processing on the adjacent word data after word segmentation, so as to generate a candidate data string; performing determination processing on the candidate data string to discover a new word; and if the new word is discovered, adding the new word into the basic dictionary to update the basic dictionary. The dictionary updating method and apparatus can reduce dictionary maintenance costs and improve dictionary update efficiency.
Owner:SHANGHAI XIAOI ROBOT TECH CO LTD
Interest model update method facing to odd discovery recommendation
InactiveCN101339563ADiscover and respond to changes in interestReduce loadSpecial data processing applicationsPersonalizationModel modification
The invention discloses an odd-finding-recommendation-oriented interest model updating method, which is used in a portal personalized recommendation service system; the invention is characterized in that: the odd-finding-recommendation-oriented interest model updating method comprises a long-term interest model modification rule LMR, a long-term interest model update rule LUR, a short-term interest model structure / update rule SUR, and an interest drifting detection rule IDR. The user interest model updating method of the invention can partly update interest description of the user, obtain the short-term interest situation of the user easily, satisfy the need of the odd finding recommendation, and realize the efficient and accurate updating of a user interest model; and moreover, the method can identify and process noise data, and avoid influences of the noise data on the stability of the user interest model when quickly responding to interest drifting at the same time. The updating method of the invention can identify and process the noise data, thus improving the accuracy and the stability of the user interest model.
Owner:BEIHANG UNIV
Method and device for machining micro annular grooves through hollow laser and electrolysis in combined mode
ActiveCN103706901AIncrease flexibilityImprove flexibilityElectrical-based auxillary apparatusElectrolysisDecomposition
The invention provides a method and device for machining micro annular grooves through hollow laser and electrolysis in a combined mode, and relates to the field of micro-electrolytic machining. Conducting glass is used as a tool cathode, the critical decomposition voltage of electrolytic machining under laser radiation is reduced, electrolytic machining is carried out on a radiation area, and the size of an annular machining area is controlled through a laser beam changing system. The laser beam changing system can be used for changing the size of an annular groove within a certain range, flexibility and softness of machining are obviously improved, under the laser radiation, the critical decomposition voltage of electrolytic machining is reduced, electrolytic machining of the radiation area is achieved, machining precision of the micro annular groove is improved, and the method and device are applied to machining of micro annular grooves of various conducting metal materials.
Owner:JIANGSU UNIV
Management system and method based on image processing
ActiveCN108460933AStatistically accurateImprove practicalityCharacter and pattern recognitionCash registersImaging processingManagement system
The invention relates to a management system and method based on image processing, and the method comprises the steps: using at least one first image acquisition device for acquiring a first image todetermine the absolute position of at least one person in an area in which the shelf is located and the relative position of the person to at least one shelf carrying at least one item; using at leastone second image acquisition device for detecting a second image of the hand of at least one person; using at least one third image acquisition device for detecting a third image of the hand of at least one person; determining the state of the item held by the corresponding person based on the comparison of the second image and the third image, responding to the state in which the person holds the item, recognizing the changes of at least one inventory position of the shelf which is located around the absolute position of the person and is also located at a predetermined relative position, and thereby judging the correspondence between the item and the changes at the inventory position.
Owner:上海序言泽网络科技有限公司
Preparation method of aromatic polycarbonate
The invention relates to aromatic polycarbonate and a preparation method of the aromatic polycarbonate. The method comprises the steps of diaryl carbonate and aromatic dihydroxy compound raw material deoxygenation treatment, raw material and catalyst melt mixing, prepolymerization, prepolymer and carrying agent gas-liquid mixing, mixture heat exchange, polymerization reaction in a multi-section flow guide falling film type polycondensation reactors and the like. The aromatic polycarbonate produced by adopting the method provided by the invention has the advantages that the molecular weight isstable, the distribution is narrow, and the product chromaticity is good. The method solves the environment pollution problem, the serious equipment corrosion problem and the problem of performance influence caused by the separation and purification difficulty of polycarbonate products in the existing interface polycondensation method. Therefore, the method provided by the invention is very suitable for the industrial large-scale production of high-quality polycarbonate.
Owner:SHAANXI YANCHANG PETROLEUM GRP +2
Feedback updating mechanism-based trust routing method
InactiveCN102075424AImprove securityAccurate Trust EvaluationData switching networksTrust relationshipDependability
The invention discloses a feedback updating mechanism-based trust routing method. The method comprises the following steps of: simulating a trust relationship in the human society; adding a feedback mechanism into a trust model; comparing actual routing and a transmission result with node recommended actions so as to update transmission trust of a transmission node and recommendation trust of a recommendation node; and introducing a discount mechanism for solving the problem of trust updating when actual transmission fails. In the routing method provided by the invention, a feedback mode is added, so that the problem of how to select routing and update trust when an immature trust evaluation node exists in a path is solved, trust is evaluated and updated more comprehensively and accurately, node reliability can be judged more accurately during routing selection or in other application scenes, a most safe and effective routing is selected, network safety is enhanced, and the method has an important practical value in actual communication network routing.
Owner:HUAZHONG UNIV OF SCI & TECH
Filler demoulding method of high salinity wastewater treated by moving bed biofilm reactor (MBBR)
ActiveCN102092850AQuick removalQuick updateTreatment with aerobic and anaerobic processesMoving bed biofilm reactorElution
The invention discloses a filler demoulding method of high salinity wastewater treated by moving bed biofilm reactor (MBBR), belonging to the technical field of wastewater treatment. The method comprises the following steps: taking a filler out of an MBBR biochemical treatment device, airing naturally, then placing the dried filler in an elution container; soaking in dilute hydrochloric acid for 8-10 hours to ensure that the soak solution is completely mixed with the filler, discharging soaking eluent and detached biofilms; then adding dilute hydrogen peroxide solution to soak for 0.5-1 hour, discharging a soaking solution and detached biofilms; and washing the filler with 0.3Mpa-0.4Mpa of water to wash down the biofilms which are loose but not detached from the inner surface of the filler. By adopting the method in the invention, when the high salinity wastewater is treated through the MBBR technology, the technical problem that the biofilms are difficult to detach and replace can be solved, the biofilms are softened, the adhesive force of the biofilms to the filler can be reduced and the biofilms can be removed from the MBBR filler fast and cleanly, thus good conditions can be created for the detachment and replacement of the biofilms and the stable and efficient treatment capability of the reactor.
Owner:江苏三强环境工程有限公司
System file repairing method, device and system
InactiveCN104317672ATimely updateFully updatedRedundant operation error correctionComputer terminalPublic network
The invention discloses a system file repairing method, device and system, relates to the field of computer security and aims to solve the problem that in the presence of an isolation network, a server local system file library cannot be updated in time. The method includes the steps: a server receives a system file set including alternate files for hotspot system files and transmitted by a public network, through an offline tool; the server updates the local system file library according to the alternate files in the system file set; if a terminal locale discovers contaminated system files, the server acquires the alternate files corresponding to the contaminated system files, from the updated local system file library and transmits the alternate files to a terminal, so that the terminal repairs the contaminated system files according to the alternate files. The method, the device and the system are mainly applied to repairing the system files contaminated by viruses.
Owner:BEIJING QIANXIN TECH
Venturi pipe and applications thereof
The invention discloses a venturi pipe and applications thereof. The venturi pipe comprises a contraction section, a throat pipe, a diffusion section and plural groups of liquid-phase spraying nozzlesarranged in parallel to the axial direction, wherein each group comprises two liquid-phase spraying nozzles with opposite spraying nozzle directions, the two liquid-phase spraying nozzles are respectively arranged at the tail end of the contraction section and the starting end of the diffusion section, the starting end of the contraction section is a gas-phase inlet, the tail end of the diffusionsection is a gas-liquid outlet, the liquid-phase inlet is arranged on the pipe wall of the contraction section and / or the diffusion section, and the liquid-phase inlet is communicated with the liquid-phase spraying nozzle through a pipeline. The venturi pipe provided by the invention is simple in structure and good in gas-liquid mixing effect, has good application prospect in a gas-liquid mass transfer process, and is particularly suitable for the fields of gas dust removal such as flue gas desulfurization, flue gas dust removal, cooling and the like.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method and system for monitoring update contents of website
ActiveCN105528416AReduce network trafficSmall amount of calculationWeb data indexingWebsite content managementWeb siteRenewal time
The present invention discloses a method and system for monitoring update contents of a website. The method comprises the steps of pre-calculating and storing update time intervals of a to-be-tested website according to update frequency of the to-be-tested website; obtaining webpage contents of the to-be-tested website and extracting text values of items at a time of every update time interval; and comparing the text values of the items extracted from the current webpage contents with the text values of the items extracted from the last webpage contents, and calculating and obtaining the items with the text values changed. The system comprises a pre-calculating module, a web crawler, a denoising module, a comparing and calculating module and a matching module. The update contents of the website can be rapidly and accurately obtained with little calculated amount, real-time update monitoring can be carried out for any website, and application is wide and comprehensive.
Owner:CENT SOUTH UNIV
Fresh air and energy-saving controller and control method thereof
InactiveCN101852477AFully updatedTo achieve the purpose of energy savingSpace heating and ventilation safety systemsLighting and heating apparatusAir volumeAtmospheric temperature
The invention relates to a fresh air and energy-saving controller and a control method thereof. The controller comprises an air opening, an air duct, a fan, an electromagnetic valve and an intelligent control circuit, wherein the air opening, the air duct and the fan lead to the room and the outdoors, the electromagnetic valve and the intelligent control circuit are arranged on the air duct and used for opening and closing the air duct, the input end of the intelligent control circuit is connected with an outdoor atmospheric temperature sensor, one route of the output end of the intelligent control circuit is connected with the power control circuits of air conditioners, another route of the output end of the intelligent control circuit is connected with the power control circuit of the fan, and another route of the output end of the intelligent control circuit is connected with the electromagnetic valve. According to the outdoor temperature and the temperature set indoors, the controller and the control method for controlling the controller can automatically start and shut down each air conditioner according to requirements, and control the intake of the fresh air, and consequently, not only is energy saved, but also the indoor air can be kept fresh.
Owner:福建省建筑科学研究院 +1
Method for self-adaptively adjusting learning rate by tracking and controlling neural network
The invention provides a method for self-adaptively adjusting the learning rate by tracking and controlling a neural network. The method comprises the following steps of building a control system; unitizing all weights of the neural network according to layers; introducing a training sample set to obtain an error signal e(n) and a training cost function epsilon(n); obtaining a linearized activation function s(x); determining an induction local region and nerve cell output of each nerve cell; solving each local gradient function delta j(n) and each linearization expression delta jL(n); adjusting the learning rate selectively and self-adaptively; training the weight of a synapse of each nerve cell; adding one to the number of cycles until stopping criterions are met, and outputting tracking and controlling signals. According to the method for self-adaptively adjusting the learning rate on the basis of the activation function and the multiple error signals, a step length iteration mean value is not affected by noise, a smooth iteration curve is obtained, and the error signals are fully used; thus, the learning rate can be updated in real time, and computation complexity is reduced.
Owner:HARBIN ENG UNIV
Method and device of determining regional transaction, server and storage medium
ActiveCN108764090AFully updatedGuaranteed presenceScene recognitionSpecial data processing applicationsData miningComputer science
The invention provides a method and device of determining regional transaction, a server and a storage medium. The method and device of determining regional transaction take the transactional featureof a sample geographical region as a training sample, take the transaction labeling result of the sample geographical region as a sample label to train to obtain a transaction determination model, soas to obtain the transaction feature which can reflect the transaction condition following the time sequence for the geographical region to be tested, and input the transaction feature into the transaction determination model to obtain a determination result about whether the geographical region to be tested output from the model has transaction. The method and device of determining regional transaction make a determination of transaction from the perspective of the geographical region by means of the pre-trained transaction determination model, instead of targeting a single point of interestPOI, thus realizing determination of transaction of the entire geographical region to be tested without leakage of transaction of the single POI so as to enable determination of transaction to be morecomprehensive, so that updating of a map is more comprehensive and the up-to-date performance of the map can be guaranteed.
Owner:LINKTECH NAVI TECH +1
High-precision map making system and method based on road test equipment
ActiveCN111179621AFully updatedIncrease the distributionRoad vehicles traffic controlEmbedded systemTransport engineering
The invention relates to a high-precision map making system and method based on road test equipment. The system comprises a road side module which comprises a plurality of road side units and is usedfor collecting road information; central nodes which are used for summarizing the road information acquired by the road side module; and a cloud server which is used for receiving the road informationgathered by the central node and completing construction and updating of a high-precision map, wherein there are multiple central nodes, each central node is wirelessly connected with at least one other central node, the cloud server is wirelessly connected with at least one central node, nmin road side units are arranged at equal intervals along the road direction per kilometer, and nmin is obtained by establishing a deployment cost evaluation model. Compared with the systems and the methods in the prior art, the system and the method have the advantages of low cost, high effectiveness, fault tolerance and the like.
Owner:TONGJI UNIV
LDPC decoding method based on variable node dynamic block update for MLC type NAND-Flash
ActiveCN110098895AIncrease profitSuppress negative effectsError correction/detection using multiple parity bitsCode conversionLdpc decodingMulti link
The invention relates to an LDPC (Low Density Parity Check Code) decoding method based on variable node dynamic block update for an MLC (Multi-Link Control) type NAND-Flash, which comprises the stepsthat S1, in an NAND-Flash storage channel, dividing variable nodes in a non-overlapping region into Data blocks, and dividing the variable nodes in the overlapping region into overlap sub-blocks; S2,continuously subdividing the Data blocks into a plurality of data sub-blocks; s3, skipping a plurality of data sub-blocks, sequentially updating the variable nodes in the remaining data sub-blocks andoverlapping sub-blocks respectively according to the sequence, searching out low-value variable nodes in each data sub-block and overlap sub-block respectively, and updating the low-value variable nodes according to the sequence; s4, judging whether a judgment condition is met or not, if yes, updating variable nodes of the plurality of data sub-blocks skipped in the step S3 in sequence and repeating the step S3, and if not, repeating the step S3; and S5, judging whether the decoding is successful or not, if not, continuing the step S4, and if so, ending. Information generated by updating thereliable nodes is used for driving and updating unreliable nodes, and the utilization rate of iteration updating information is increased.
Owner:SUN YAT SEN UNIV
Interactive health education display system
PendingCN108154828AExquisite designSimple structureStatic indicating devicesAdvertisingHealth educationDisplay device
The invention discloses an interactive health education display system, which comprises a first display device and a second display device. The first display device and the second display device are used for playing health education information, the first display device is arranged at a high position, and the second display device is arranged at a low position. The second display device comprisesa touch display screen and a first microcontroller connected with the touch display screen, and the first microcontroller communicates with a second microcontroller of the first display device and sends control signals to the same to control display contents of the first display device. The interactive health education display system is ingenious in design, the display contents of the display device at the high position can be remotely controlled by the display device at the lower position, and accordingly a user can select the display contents of the display device at the high position according to own needs, and user interactivity is improved. In addition, the user can select to-be-displayed health education contents according to needs, the user can learn and understand specifically, andapplication flexibility of health education equipment is improved.
Owner:李大旭
Handwriting model training method, handwriting recognition method, device and apparatus and medium
ActiveCN108985442AImprove recognition accuracyFully updatedCharacter and pattern recognitionNeural architecturesChinese charactersBack propagation algorithm
The invention discloses a handwriting model training method, a handwriting character recognition method, device and apparatus and a medium. The handwriting model training method includes: obtaining anormalized Chinese character training sample based on a pixel value characteristic matrix of each character in a Chinese character training sample to be processed, training a convolution neural network using the normalized Chinese character, updating weights and biases of the convolution neural network based on a batch gradient descent back propagation algorithm, and obtaining a normalized Chinesecharacter recognition model; obtaining and using non-standard Chinese character training samples, and carrying out training to obtain the adjusted Chinese handwritten character recognition model; obtaining a Chinese character sample to be tested and adopting the sample to obtain an error character training sample; obtaining a target Chinese handwritten character recognition model by updating theweights and biases of the Chinese handwritten character recognition model with error training samples. A target Chinese handwritten character recognition model with a high recognition rate can be obtained by using that handwritten model train method.
Owner:PING AN TECH (SHENZHEN) CO LTD
Decoding method of ldpc code based on dynamic block update of variable nodes
ActiveCN110098895BAvoid transmissionIncrease profitError correction/detection using multiple parity bitsCode conversionLow-density parity-check codeCoding decoding
The invention relates to an LDPC (Low Density Parity Check Code) decoding method based on variable node dynamic block update for an MLC (Multi-Link Control) type NAND-Flash, which comprises the stepsthat S1, in an NAND-Flash storage channel, dividing variable nodes in a non-overlapping region into Data blocks, and dividing the variable nodes in the overlapping region into overlap sub-blocks; S2,continuously subdividing the Data blocks into a plurality of data sub-blocks; s3, skipping a plurality of data sub-blocks, sequentially updating the variable nodes in the remaining data sub-blocks andoverlapping sub-blocks respectively according to the sequence, searching out low-value variable nodes in each data sub-block and overlap sub-block respectively, and updating the low-value variable nodes according to the sequence; s4, judging whether a judgment condition is met or not, if yes, updating variable nodes of the plurality of data sub-blocks skipped in the step S3 in sequence and repeating the step S3, and if not, repeating the step S3; and S5, judging whether the decoding is successful or not, if not, continuing the step S4, and if so, ending. Information generated by updating thereliable nodes is used for driving and updating unreliable nodes, and the utilization rate of iteration updating information is increased.
Owner:SUN YAT SEN UNIV
An ECG signal detection device and analysis method based on joint neural network
ActiveCN111184508BHighlight substantiveSignificant progressSensorsTelemetric patient monitoringEcg signalResidual neural network
The invention discloses an ECG signal detection device and analysis method based on a joint neural network. First, a joint neural network algorithm is built on a machine learning server and a model is trained. For the preprocessed ECG data, the model is passed through the residual neural network. The network module extracts the spatial features of the data and obtains the spatial classification probability, and extracts the time-series features of the data on the dimensionality-reduced spatial feature map through the bidirectional long-short-term memory neural network and the attention module to obtain the time-series classification probability, and finally fuses the two classification probabilities Obtain the test results; obtain a small amount of ECG data from the wearable device, manually mark it and input it into the machine learning server for model fine-tuning, and deploy the final model to the smart mobile device; finally, the wearable device and the smart mobile device will be connected through wireless Transport enables real-time anomaly detection. The present invention develops a wearable device from collection to real-time detection of electrocardiographic signals, and provides effective technical means for assisting in the diagnosis of heart diseases.
Owner:WUHAN UNIV
Interest model update method facing to odd discovery recommendation
InactiveCN101339563BDiscover and respond to changes in interestReduce loadSpecial data processing applicationsProcess noisePattern recognition
The invention discloses an odd-finding-recommendation-oriented interest model updating method, which is used in a portal personalized recommendation service system; the invention is characterized in that: the odd-finding-recommendation-oriented interest model updating method comprises a long-term interest model modification rule LMR, a long-term interest model update rule LUR, a short-term interest model structure / update rule SUR, and an interest drifting detection rule IDR. The user interest model updating method of the invention can partly update interest description of the user, obtain the short-term interest situation of the user easily, satisfy the need of the odd finding recommendation, and realize the efficient and accurate updating of a user interest model; and moreover, the method can identify and process noise data, and avoid influences of the noise data on the stability of the user interest model when quickly responding to interest drifting at the same time. The updating method of the invention can identify and process the noise data, thus improving the accuracy and the stability of the user interest model.
Owner:BEIHANG UNIV
A method for strengthening anaerobic co-digestion based on the isoelectric point of sludge using acid fermentation of food waste
ActiveCN111517606BPromote dissolutionEnhancing anaerobic biotransformation to produce methaneWaste based fuelWater/sewage treatment by ion-exchangeCentrifugationPulp and paper industry
The invention provides a method for strengthening anaerobic digestion of sludge by acid fermentation of kitchen waste based on isoelectric point, which comprises: performing acid production on kitchen waste by anaerobic fermentation to obtain acid production liquid by fermentation of kitchen waste; Collect the food waste fermentation acid production liquid, collect the fermentation acid production supernatant and fermentation residue respectively; use the fermentation acid production supernatant to condition the sludge to the isoelectric point of the sludge; separate the conditioned sludge from solid and liquid, separate Collect the first supernatant and sludge deposits; adjust the first supernatant with lye, perform centrifugation, and collect the second supernatant and metal deposits respectively; treat the second supernatant with a cation exchange resin, Collect the filtrate; mix and stir the fermentation residue, sludge deposits and filtrate to obtain a mixture; carry out anaerobic digestion, and collect biogas and biogas residue; the present invention utilizes the food waste fermentation acid production liquid to provide exogenous hydrogen protons to remove pollution The heavy metals in the sludge can effectively dispose of kitchen waste while strengthening the resource utilization of sludge.
Owner:TONGJI UNIV
Method and system for monitoring website update content
ActiveCN105528416BReduce network trafficSmall amount of calculationWeb data indexingWebsite content managementWeb crawlerData mining
The present invention discloses a method and system for monitoring update contents of a website. The method comprises the steps of pre-calculating and storing update time intervals of a to-be-tested website according to update frequency of the to-be-tested website; obtaining webpage contents of the to-be-tested website and extracting text values of items at a time of every update time interval; and comparing the text values of the items extracted from the current webpage contents with the text values of the items extracted from the last webpage contents, and calculating and obtaining the items with the text values changed. The system comprises a pre-calculating module, a web crawler, a denoising module, a comparing and calculating module and a matching module. The update contents of the website can be rapidly and accurately obtained with little calculated amount, real-time update monitoring can be carried out for any website, and application is wide and comprehensive.
Owner:CENT SOUTH UNIV
A management system and method based on image processing
ActiveCN108460933BStatistically accurateImprove practicalityCharacter and pattern recognitionCash registersImaging processingComputer science
The present invention relates to a management system and method based on image processing. The method includes: using at least one first image acquisition device for acquiring a first image to determine the absolute position of at least one person in the area where the shelf is located and the person relative position with respect to at least one shelf carrying at least one item; using at least one second image capture device for detecting a second image of the hand of at least one person; using at least one third image capture device for A third image for detecting the hand of at least one person; wherein, based on a comparison of the second image and the third image, it is determined that the state of the corresponding person holding the object is identified in response to the state of the person holding the object The change of at least one inventory position of the shelf in the predetermined relative position around the absolute position, and thereby determine the correspondence between the item and the change of the inventory position.
Owner:上海序言泽网络科技有限公司
A rotary barrel photocatalytic reaction device
InactiveCN104324673BSolve the sealing problemFully updatedEnergy based chemical/physical/physico-chemical processesPhotocatalytic reactionPhoto catalytic
The invention discloses a rotary drum type photo-catalytic reaction device. A metal reactor bracket is connected with an outer cylinder barrel; the outer cylinder barrel is supported by the metal reactor bracket; a certain included angle is formed between the outer cylinder barrel and the ground; an inner cylinder barrel is placed in the outer cylinder barrel; three uniform annular permanent magnets are mounted on the outer wall of the inner cylinder barrel and are matched with the outer cylinder barrel; a light source is inserted into the center of the outer cylinder barrel and is not in contact with the outer cylinder barrel; a shoveling plate is mounted on the inner wall of the inner cylinder barrel and is parallel to the light source; an annular permanent magnet is parallel to the three uniform annular permanent magnets and is mounted outside the outer cylinder barrel; the shoveling plate and the inner cylinder barrel rotate together, so that a catalyst can be updated; a sealing metal flange is mounted at the top of the outer cylinder barrel; a gas inlet and a gas outlet are symmetrically formed in the sealing metal flange and cannot rotate along with the inner cylinder barrel; screws are arranged at two ends of the sealing metal flange. The surface of the catalyst can be updated, and the problem of sealing caused by mechanical stirring is solved.
Owner:INNER MONGOLIA NORMAL UNIVERSITY
Advertisement push system and method based on CMMB system
Owner:ALLWIN TELECOMM
A kind of Venturi tube and its application
ActiveCN110935268BHigh speedImprove atomization effectFlow mixersUsing liquid separation agentFluid phaseFlue gas
Owner:CHINA PETROLEUM & CHEM CORP +1
Preparation method of aromatic polycarbonate
The invention relates to aromatic polycarbonate and a preparation method of the aromatic polycarbonate. The method comprises the steps of diaryl carbonate and aromatic dihydroxy compound raw material deoxygenation treatment, raw material and catalyst melt mixing, prepolymerization, prepolymer and carrying agent gas-liquid mixing, mixture heat exchange, polymerization reaction in a multi-section flow guide falling film type polycondensation reactors and the like. The aromatic polycarbonate produced by adopting the method provided by the invention has the advantages that the molecular weight isstable, the distribution is narrow, and the product chromaticity is good. The method solves the environment pollution problem, the serious equipment corrosion problem and the problem of performance influence caused by the separation and purification difficulty of polycarbonate products in the existing interface polycondensation method. Therefore, the method provided by the invention is very suitable for the industrial large-scale production of high-quality polycarbonate.
Owner:SHAANXI YANCHANG PETROLEUM GRP +2
An image acquisition system based on thermal characteristic image
ActiveCN109089082AEfficient acquisitionReal-time feedback on action statusTelevision system detailsCo-operative working arrangementsTemperature differenceThermostat
The invention relates to an image acquisition system based on a thermal characteristic image, comprising a thermal image acquisition device for acquiring thermal images of an access mechanism in stilland / or in motion; a temperature regulator for regulating the temperature of the access mechanism; a controller for controlling a temperature regulator and / or a thermal image collector; temperature detector, shelf for real-time record, a temperature value of that environment in which the access mechanism and / or system is located, as the access mechanism moves, the temperature regulator can regulate the temperature of the access mechanism based on the instruction from the controller to regulate the temperature of the access mechanism and / or the temperature value of the temperature detector, soas to increase the temperature difference between the access mechanism and the shelf and / or the ambient temperature, so that the thermal image collector can track and record the access mechanism and generate a thermal image; when the access mechanism is stationary, the thermostat adjusts the temperature of the access mechanism to the same temperature as the shelf so that the thermal image collector no longer tracks the access mechanism.
Owner:HUNAN UNIV OF HUMANITIES SCI & TECH
A high-precision map production system and method based on drive test equipment
ActiveCN111179621BFully updatedIncrease the distributionRoad vehicles traffic controlEmbedded systemTransport engineering
Owner:TONGJI UNIV
A method and device for hollow laser and electrolytic combined machining of micro ring grooves
ActiveCN103706901BIncrease flexibilityImprove flexibilityElectrical-based auxillary apparatusElectrolysisDecomposition
The invention provides a method and device for machining micro annular grooves through hollow laser and electrolysis in a combined mode, and relates to the field of micro-electrolytic machining. Conducting glass is used as a tool cathode, the critical decomposition voltage of electrolytic machining under laser radiation is reduced, electrolytic machining is carried out on a radiation area, and the size of an annular machining area is controlled through a laser beam changing system. The laser beam changing system can be used for changing the size of an annular groove within a certain range, flexibility and softness of machining are obviously improved, under the laser radiation, the critical decomposition voltage of electrolytic machining is reduced, electrolytic machining of the radiation area is achieved, machining precision of the micro annular groove is improved, and the method and device are applied to machining of micro annular grooves of various conducting metal materials.
Owner:JIANGSU UNIV
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