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36results about How to "Shorten evacuation time" patented technology
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System for handling workpieces and method for operating such a system
ActiveUS20150375401A1Improve productivitySlow changeDigital data processing detailsGripping headsControl valvesControl theory
The invention relates to a system (10) for handling workpieces, with a handling device (12) which comprises at least one vacuum gripper (16) for drawing a workpiece in by suction, with at least one vacuum generator (26) that can be operated by the supply of compressed air for supplying the vacuum gripper (16) with vacuum, with at least one controllable control valve (28) by which the supply of compressed air to the vacuum generator (26) can be controlled, wherein the control valve (28) is associated with a control device (30) for the proper control of the control valve (28 as required. The handling device comprises an evaluation unit (32) for evaluating operating data of the vacuum generator (26) and / or for evaluating operating data of the handling device (12) as well as for generating control signals as a function of the evaluated operating data, wherein the evaluation unit (32) is arranged on the handling device (12), and wherein the control device (30) controls the control valve (28) as a function of the control signals transmitted from the evaluation unit (32).
Owner:J SCHMALZ GMBH
System for fabricating a device on a substrate with a process gas
InactiveUS6544341B1Improve abilitiesExpedite evacuationChemical vapor deposition coatingSemiconductor devicesProduct gasChemical vapor deposition
A method and system for fabricating a device on a substrate with a process gas, such as with chemical vapor deposition. A reaction chamber and support chuck cooperate to form a low conductance configuration for axisymetric process gas flow over the substrate and to form a high conductance configuration for enhanced evacuation of residual process gas from the reaction chamber upon completion of the process. A dual conductance chuck has an indented region that aligns with the exhaust port of the reaction chamber to restrict process gas flow in the low conductance configuration, and that moves distal a showerhead and the exhaust port to provide reduced restriction of process gas flow for reaction chamber evacuation. The chuck includes thermal control for enhancing film deposition on the substrate and for reducing residual film deposition on the chuck. An evacuation opening in the housing provides independent evacuation of residual gas from the housing. The present invention enhance throughput of device formation by reducing purge and process cycle times.
Owner:CVC PRODS
System for handling workpieces and method for operating such a system
ActiveUS9656813B2Delayed reaction timeShorten evacuation timeGripping headsJet pumpsControl signalControl valves
Owner:J SCHMALZ GMBH
Intersection signal control method based on exit residual capacity constraints
ActiveCN106251655AEliminate Queue Overflow ConditionsAvoid blockingControlling traffic signalsTraffic flowData transmission
The invention discloses an intersection signal control method based on exit residual capacity constraints. Adopted devices comprise multiple traffic flow detectors, a data transmission subsystem, a data processing and control module and lane signal lamps. Firstly, each traffic flow detector acquires queue information of each exit lane at the intersection in real time; then, the traffic flow detector transmits the acquired queue information to the data processing and control module via the data transmission subsystem; and finally, the data processing and control module carries out logic judgment on the received queue information, when queue overflow is about to happen in certain exit lane through judgment, the data processing and control module adopts strategies such as a shortened green lamp and phase jump to instantly give a control command to the data transmission subsystem to change the color of the lane signal lamp, a vehicle flow driving in the exit lane is interrupted, and thus, smooth running at the intersection is ensured. On one hand, happening of a queue overflow condition at the intersection exit can be eliminated through a signal control technology, and traffic jam at the intersection can be avoided; and on the other hand, the passing ability of the intersection in a congested area is improved, and the traffic jam evacuation time is shortened.
Owner:黑龙江省工研院资产经营管理有限公司
Charged particle beam device
InactiveUS20100181480A1Reduce capacityReduce materialMaterial analysis using wave/particle radiationElectric discharge tubesRotary stageElectric field distortion
According to the present invention, a charged particle beam device has an unlimitedly rotatable sample stage and an electric field control electrode for correcting electric field distortion at a sample peripheral part. A voltage is applied to a sample on the unlimitedly rotatable sample stage through a retarding electrode that is in contact with a holder receiver at a rotation center of a rotary stage. An equipotential plane on the electric field control electrode is varied by applying a voltage to the electric field control electrode, and following this the equipotential plane at a sample edge is corrected, which enables the sample to be observed as far as its edge.
Owner:HITACHI LTD
An indoor crowd evacuation method and system
ActiveCN109948229AShorten the average evacuation distanceAvoid collisionForecastingSpecial data processing applicationsCrowdsPath plan
The invention discloses an indoor crowd evacuation method which comprises the steps of scene model initialization: dividing a plane graph according to a grid rule to generate a cellular space according to the plane graph of a building venue where pedestrians are located, and initializing the cellular space; a pedestrian evacuation step: on the basis of determining a cellular state updating rule, enabling the cellular occupied by each pedestrian to perform state updating according to the rule in a discrete time step, and recording the position of the pedestrian in each time step until all the pedestrians escape from the venue; path planning: providing path planning information for each pedestrian according to the operation result of the model and the identity of the pedestrian, and guidingthe pedestrian to escape from the venue; according to the method, various influence factors are considered, so that when a disaster occurs, the crowd evacuation efficiency can be improved through themethod, crowd congestion is avoided, meanwhile, a path plan can be provided for each person through the method, each person is guided to leave a building or a venue, and collision with other people isavoided.
Owner:NANJING UNIV OF POSTS & TELECOMM
Real-time situation awareness-based evacuation adaptive selection method, system and terminal
The invention provides a real-time situation awareness-based evacuation adaptive selection method, a system and a terminal. The method comprises the following steps that: step S1, path segments are classified according to road types, and the passage time of a people group to be evacuated is predicted according to the environmental factors of each path segment and the factors of the people to be evacuated; step S2, an evacuation route enabling the least total usage time is adopted as an optimal evacuation route according to the passage time realized by each path segment; and S3, the people to be evacuated are evacuated and escape according to the optimal evacuation route, and the method returns to S1 if the passage quality of a certain path segment attenuates quickly or congestion delay increases during an evacuation process. With the evacuation adaptive selection method of the invention adopted, the route enabling the least total usage time is obtained according to two environmental factors, namely temperature and oxygen content in the channel, and the factor of the people to be evacuated; an environment in the channel is monitored in real time during an evacuation process, so thatthe route can be adjusted in time; and therefore, the safety of the people to be evacuated can be ensured, and evacuation time can be significantly reduced.
Owner:SHANGHAI RES CENT FOR WIRELESS COMM +1
Crowd evacuation path optimization method based on swarm intelligence algorithm and evacuation entropy
ActiveCN110543975AAccurately reflectImprove evacuation efficiencyForecastingCharacter and pattern recognitionAlgorithmBat algorithm
The invention relates to a crowd evacuation path optimization method based on a swarm intelligence algorithm and evacuation entropy. The crowd evacuation path optimization method is executed by a computer, and comprises the specific steps: S1, constructing an evacuation environment; S2, initializing evacuation crowd and evacuation path parameters; S3, dividing the crowd into a plurality of small crowds based on a k-means clustering algorithm; S4, updating the positions of all individuals based on a hybrid artificial bee colony-bat algorithm; S5, performing position correction on all individuals based on the evacuation entropy; S6, enabling all individuals to be subjected to obstacle avoidance; and S7, if the algorithm does not reach the end condition, returning to the step S4, otherwise, ending the algorithm, and finishing evacuation. Compared with the prior art, the crowd evacuation path optimization method has the advantages that evacuation behaviors are richer, and evacuation movement better conforms to the real situation, and the evacuation efficiency is high.
Owner:TONGJI UNIV
Electric power engineering start-up debugging car
ActiveCN104590087ASpeed up the boot processReduce duplication of effortItem transportation vehiclesPilot systemEngineering
The invention discloses an electric power engineering start-up debugging car which comprises an apparatus and equipment operating area and an apparatus and equipment installing area for debugging located in a cabin; the apparatus and equipment operating area comprises a tool cabinet, an operating board and a distribution box; the apparatus and equipment installing area for debugging comprises apparatus and equipment for debugging, signal wires for debugging, an apparatus rack and a signal wire rack; the signal wire rack is arranged by layers and provided with a wire coil and a sliding plate with a fixed pulley; the end parts of the signal wires for debugging are each provided with a pluggable terminal; the apparatus and equipment are installed on the apparatus rack through a sliding rail and an end lock catch device, and the apparatus and equipment for debugging comprise a voltage and current signal voltage divider, an electro-optical signal convertor, a signal-acquiring device and a data service platform for debugging. The electric power engineering start-up debugging car has the advantages of being compact in structure, convenient in detachment and installation, safe and reliable, flexible in use and great in practicability, the car is suitable for start-up debugging testing systems on electric power engineering sites with different voltage classes, the testing risk can be lowered, the damage to the apparatus can be reduced, the electric power engineering start-up progress can be promoted, time and labor can be saved and integration management can be carried out easily.
Owner:STATE GRID CORP OF CHINA +2
Large-scale dense crowd rapid evacuation method based on a shared bicycle
InactiveCN109800922AShorten evacuation timeImprove securityGenetic modelsForecastingCluster algorithmTelecommunications
The invention relates to a large-scale dense crowd rapid evacuation method based on a shared bicycle. The method comprises the following steps: firstly, analyzing stations near a site with large-scaledense crowds, positioning a starting station, screening out a destination station, determining the people stream attraction capability of the destination station according to the transport capacity of the destination station and the distance between the destination station and the starting station, and predicting the people stream guidance; using an improved K-Means clusting alograithim to dividea destination site into a plurality of clusters. and finally, the scheduling path of the scheduling vehicle of each station in the cluster is optimized. According to the method, people can be evacuated faster at the initial stage by deploying the bicycles, the riding rate of people is increased through the station clustering algorithm and the dispatching vehicle dispatching algorithm, the crowd evacuation time is shortened, the effect of evacuating the crowds is effectively achieved, and the safety of large-scale dense crowd places is improved.
Owner:ZHEJIANG SCI-TECH UNIV
Novel fire-fighting door
InactiveCN112081508AShorten evacuation timeReduce fire threatFireproof doorsSealing arrangementsThermal insulationMetal framework
The application discloses a novel fire-fighting door. The fire-fighting door comprises a door frame and a main door leaf hinged to the door frame, and a fireproof embedded lock is arranged on the movable side of the main door leaf; sealing strips are arranged on the periphery of the inner side of the door frame; a door closer is arranged between the upper portion of the main door leaf and the doorframe; the main door leaf comprises a first metal framework, and a first fireproof plate and a first decorative plate which are sequentially covered on the two faces of the metal framework; the firstmetal framework comprises a first top plate and a first bottom plate; the space between the first top plate and the first bottom plate is filled with a fireproof thermal insulation material; an escape exit is formed in the main door leaf; an escape door leaf is arranged in the escape exit; the escape door leaf is made of a fireproof thermal insulation material; the escape door leaf is hinged withan escape exit spring; a sealing strip is arranged on the inner side of the escape exit; and limiting strips are arranged on the side, in the closing direction of the escape door leaf, of the periphery of the escape exit. The fire-fighting door has the advantages of being simple in structure, good in sealing effect, rapid in passing during escape and the like.
Owner:天津安博瑞尼科技股份有限公司
Super capacitive energy storage elevator self-rescue device
InactiveCN103303759ADoes not affect the topologyRealize emergency rescueElevatorsEmergency power supply arrangementsFrequency changerCapacitance
The invention relates to a super capacitive energy storage elevator self-rescue device. According to the device, on the basis that the original elevator frequency conversion drive unit is not changed, a main circuit is additionally provided with a super capacitive energy storage device as an elevator reserve power supply to prevent the panic and dangers of personnel in an elevator car due to an out-of-control elevator caused by sudden power failure of a mains supply when a disaster such as an earthquake and a fire disaster occurs. The elevator frequency conversion drive unit comprises an uncontrollable rectifier bridge module, a direct current bus filter capacitor, a frequency converter power module and an elevator tractor. The super capacitive energy storage device consists of a super capacitor and a two-cascade BOOST circuit. The super capacitor has the advantages of high capacitance, quick charging and discharging, wide operating temperature range, long cycle service life, simplicity in maintenance and the like. The two-cascade BOOST circuit can perform quick discharging control on the super capacitor, allow the super capacitor to output high voltage quickly when operating, and allow the bus voltage to be kept higher, so that the elevator tractor can operate at a higher speed, the elevator can arrive at designated floors as soon as possible, and the personnel in the car can get rid of the dangers as soon as possible.
Owner:TIANJIN UNIV +1
A method for prevention and control of old empty water under the condition of repeated mining under the condition of layering on thick coal seam damaged by small kiln
ActiveCN111140279BSmall amount of workShorten the timeSurveyDirectional drillingWater circulationCoal
The invention discloses a method for prevention and control of stagnant water under the condition of repeated recovery of layers damaged by small kilns on a thick coal seam. 1. Use the transient electromagnetic method and the high-density direct current method to detect the old empty water-rich anomaly area in front of the roadway; step 4, arrange conventional boreholes at the head of the roadway for drilling verification. ‑Excavation‑exploration cycle operation method to control the old empty water; Step 5, if water gushing occurs in the drilling verification process in Step 4; Step 6, If the amount of water drained by conventional drilling in Step 5 tends to be stable for a long time time processing. The present invention utilizes ground, downhole geophysical prospecting-conventional drilling-directional drilling to prevent and control old empty water, realizes advanced, efficient, safe, accurate, large drop, and long-distance interception and introduction of head-on old empty water, and effectively controls old empty water damage .
Owner:XIAN UNIV OF SCI & TECH
Fully enclosed refractory lifeboat with radiation monitoring and decontamination functions
PendingCN108974264AEliminate decontamination processShorten evacuation timeCabin closetsSpecial purpose vesselsRadioactive contaminationFresh water
The invention discloses a fully enclosed refractory lifeboat with radiation monitoring and decontamination functions, It includes the lifeboat body, A waiting area, decontamination room, shower, dressing room and personnel riding room are sequentially arranged in the inner cavity of the lifeboat main body from the rear to the front, ; rear boarding door is arranged outside the waiting area; decontamination room is provided with a spray system for removing radioactive pollution; fresh water spray system is arranged in the shower room; radiation monitoring room is arranged in the dressing room;and front boarding door is arranged on the outdoor side of personnel riding room. At that time of application, the invention can ensure that when the nuclear-related offshore platform encounter an emergency situation, the radiation monitoring and the decontamination of the radioactive contaminate personnel on the platform are carried out and the platform is evacuated urgently, the platform decontamination process is omitted, and the evacuation time is shortened.
Owner:NO 719 RES INST CHINA SHIPBUILDING IND
Open-cut method tunnel structure
InactiveCN105714855AShorten evacuation timeImprove evacuation capacityArtificial islandsUnderwater structuresEngineering
The invention discloses an open-cut tunnel structure. The main body of the tunnel structure includes at least two tunnel holes, a plurality of fire doors are arranged on the partition wall between the two tunnel holes, and a climbing ladder is correspondingly arranged at each of the fire doors. , on the roof of the main structure of the tunnel corresponding to the top of each ladder, there are escape holes leading to the green belt on the ground, and the openings of each escape hole are provided with a manhole cover door that opens from the inside of the tunnel to the outside . The invention provides more options for tunnel escape and evacuation, greatly shortens the escape time, increases the evacuation capacity of the tunnel escape system, and ensures the effect of rapid evacuation.
Owner:SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
Charged particle beam device
InactiveUS8766185B2Reduce capacityReduce materialMaterial analysis using wave/particle radiationElectric discharge tubesRotary stageElectric field distortion
Owner:HITACHI LTD
Fixed Blade Assembly Usable in Exhaust Pump, and Exhaust Pump Provided with same
ActiveUS20140010659A1Improve performanceShorten evacuation timePropellersRotary propellersEngineeringMechanical engineering
Provided are a stator blade assembly advantageous for improving the evacuation performance by shortening the evacuation time, and an exhaust pump provided with such a stator blade assembly. Inner and outer stator blade bases of a plurality of stator blades are supported by frames. A projecting portion protruding from the frame supporting the inner stator blade base, or from the frame supporting the outer stator blade base, or from both of the frames is provided in a gap in the vicinity of the inner or outer stator blade base between one of the supported stator blades and the stator blade transversely adjacent thereto.
Owner:EDWARDS JAPAN
Novel benzamide derivatives and process for the prepartion thereof
InactiveUS20100105727A1High affinityLower capability requirementsBiocideNervous disorderDiseaseTreatment effect
The present invention provides a novel benzamide derivative represented by formula 1 and an isomer, a pharmaceutically acceptable salt or hydrate thereof, and a composition for activating a 5-HT<sb>4< / sb> receptor comprising the same, as an active ingredient. Benzamide derivatives of the present invention has superior affinity for 5-HT<sb>4< / sb> receptors, capability to reduce the gastric evacuation time, capability to alleviate ventricular tachycardia, ventricular fibrillation, torsades de pointes and QT prolongation, and low toxicity. Therefore, benzamide derivatives of the present invention are therapeutically effective for digestive system diseases.
Owner:DONG A PHARMA
Large high-rise building indoor fire urgent evacuation indication escape method and system
ActiveCN103394171BImprove safe evacuation performanceReduce casualtiesBuilding rescueFire alarm smoke/gas actuationFire evacuationFire control
The invention discloses a large high-rise building indoor fire urgent evacuation indication escape method and system, and belongs to the field of high-rise building fire safety. The large high-rise building indoor fire urgent evacuation indication escape method comprises the following steps: step 1, a fire source is located; step 2, a dynamic module of fire spread is set up; step 3, according to the dynamic module of fire spread in combination with the structural information of a building, the spatial position of an ignition point and the spatial position of fire-fighting equipment in a large high-rise building are determined, predictions are made over fire spread paths, and evacuation escape routes are planned; step 4, according to the designed escape routes, site equipment is controlled in a selective mode for assisting people in evacuation. According to the large high-rise building indoor fire urgent evacuation indication escape method and system, the fire control escape routes are made based on specific fire behavior, so that evacuation time is shortened; the existing problems that when a fire breaks out, a fire control evacuation escape way is crowded , low in efficiency and disorderly and stampedes easily occur are solved fundamentally; the practical significance of improving the safe evacuation performance of the large high-rise building and reducing the property loss and casualties caused by the fire in the large high-rise building is quite high.
Owner:天津安博瑞尼科技股份有限公司
A Control Method of Intersection Signal Based on Exit Remaining Capacity Constraint
ActiveCN106251655BEliminate Queue Overflow ConditionsAvoid blockingControlling traffic signalsTraffic flowData transmission
Owner:黑龙江省工研院资产经营管理有限公司
Arrangement structure of evacuation passages for a highway-rail joint construction shield tunnel
ActiveCN103670437BIncrease widthPrevent intrusionTunnelsSafety equipmentsEngineeringShield tunnelling
The invention discloses an evacuation route arrangement structure for a combined highway and metro shield tunnel. The structure comprises a lateral evacuation platform and an evacuation route, wherein a first fireproof door is arranged between the lateral evacuation platform and the evacuation route; the evacuation route comprises a walking plane and stairs; the walking plane comprises a low walking plane on the same elevation with the lateral evacuation platform, a high walking plane at the same elevation of an entrance of the stairs and a gentle slope for connecting the low and high walking planes; the stairs are positioned in a stair well, and the stair well consists of a stair well partition wall and a shield tunnel pipe piece; a second fireproof door is arranged on the stair well partition wall between the high walking plane and the stairs; a pressurization fan is arranged another stair well partition wall opposite to the second fireproof door. According to the structure, the width of the evacuation route is greatly increased, the evacuation time is shortened, and the evacuation efficiency is improved; in addition, the evacuation route is prevented from being invaded by fire smoke on a highway layer, so that the evacuation safety is improved.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
A crowd evacuation simulation method and system based on multi-bee colony algorithm
ActiveCN107292064BRealization of evacuation simulationIncrease profitData processing applicationsArtificial lifeCrowdsMetapopulation
The invention relates to a simulation method and system for crowd evacuation based on a multi-bee colony algorithm. The method comprises the steps of setting evacuation scene parameter information, creating an evacuation scene model and a character model, and importing the character model into the evacuation scene model, wherein the evacuation scene model serves as the environment space of the crowd evacuation, and the character model serves as an evacuation crowd; extracting semantic information of the evacuation scene model, setting evacuation crowd parameter information under an evacuation scene, and conducting crowd initialization according to the evacuation crowd parameter information; dividing the evacuation crowd into groups, selecting a leading bee out from each group, adopting the multi-bee colony algorithm and adding auxiliary population to plan macroscopic paths, adopting a social force model to guide the movement of microscopic population, obtaining a final crowd evacuation path to conduct the simulation of the crowd evacuation. Through the adoption of the method, the simulation of the crowd evacuation in complex scenes can be really and effectively achieved, the evacuation time is shortened, the utilization rate of exits is increased, and the method can provided help for real evacuation rehearsals.
Owner:SHANDONG NORMAL UNIV
An ultra-deep sea offshore oil and gas dry production system and its installation and evacuation method
Owner:DALIAN UNIV OF TECH
Storage tank
PendingCN109896184AReduce injuriesReduce the chance of injuryLarge containersPetrochemicalStorage tank
The invention relates to the field of petrochemical industry, and discloses a storage tank. The storage tank comprises a tank body, a sliding groove part and a platform (1) fixed on the tank body. Theplatform (1) is provided with a convex edge (2) extending out of the outer side of the tank body, a through hole is formed in the convex edge, the sliding groove part is connected with the convex edge (2) and extends to the ground in an inclined mode, and the groove opening of the sliding groove part communicates with the through hole. The storage tank is capable of reducing the withdrawing timeof people from the storage tank in the case of emergency occurring, and people injury rate is thus lowered.
Owner:CHINA PETROLEUM & CHEM CORP +1
An emergency evacuation indicator light in buildings capable of differentiated guidance
ActiveCN109615806BPrecise evacuationShorten evacuation timeSignalling system detailsElectric transmission signalling systemsPilot lightEmergency evacuation
The invention discloses an in-building emergency evacuation indicator lamp capable of conducting differentiated guidance. The in-building emergency evacuation indicator lamp aims to provide non-interfering differentiated evacuation path guidance for to-be-evacuated people in a building. The in-building emergency evacuation indicator lamp is provided with a pixel lamp base composed of a flat plateand grid bars; the grid bars are vertically mounted on the front face of the flat plate mutually parallelly at equal intervals; the grid bars can extend out to stand on the front face of the flat plate and can also retract into to be hidden in the front face of the flat plate; and pixel lamps are mounted the left face and the right face of each grid bar in column and also mounted on the front faceof the flat plate in column. When the indicator lamp displays guidance signals, people located at front left part and the front right part of the indicator lamp can only see the guidance signal displayed by the pixel lamps on the left faces and the right faces of all the grid bars in a combined mode, people in front of the indicator lamp can only see the guidance signal displayed by the pixel lamps on the front face of the flat plate in a combined mode. The indicator lamp can display the signals in a pulse mode in the divided time periods on the left faces of the grid bars, the front face ofthe flat plat and the right faces of the grid bars so as to guide people at the front left part, in front and the front right part; and thus the non-interfering differentiated guidance signals are provided for people at different positions.
Owner:CIVIL AVIATION UNIV OF CHINA
Evacuation method and storage medium
ActiveUS8516715B2Shorten evacuation timeElectric discharge tubesDrying solid materials without heatEngineeringAtmospheric pressure
An evacuation method which can reduce evacuation time without causing moisture-related problems. In a vacuum processing apparatus including a vacuum processing chamber, during the evacuation for the vacuum processing chamber, the pressure in the vacuum processing chamber is maintained at a pressure lower than or equal to the atmospheric pressure but higher than or equal to 6.7×102 Pa (5 Torr).
Owner:TOKYO ELECTRON LTD
Handling of hydrocarbons and equipment of an offshore platform
ActiveUS10718185B2Reduce evacuation timeMaximise restrict sizeArtificial islandsVessel designingHydrogen compoundsThermodynamics
A method for handling of hydrocarbons on an offshore platform includes the absence of emergency depressurisation for a fire. The method includes arranging the platform such that there is no mechanism for emergency depressurisation of a hydrocarbon inventory of the platform in the event of a fire, restricting the size of the platform such that evacuation of personnel can be achieved prior to escalation of a fire due to the lack of emergency depressurization, and permitting a fire to escalate by combustion of the hydrocarbon inventory after evacuation of the personnel.
Owner:EQUINOR ENERGY AS
Evacuation ladder with adjustable level
Owner:HEAVY EQUIP ENG CO LTD OF WUCHANG SHIPBUILDING IND
An Evacuation Planning Method for Disaster Emergency
ActiveCN106940825BImprove computing efficiencyAddressing the Difficult Modeling of Disaster EnvironmentsForecastingSimulationEmergency Shelter
Owner:NANJING UNIV OF POSTS & TELECOMM
An air defense rapid evacuation device
ActiveCN112169208BEasy rideEasy to storeBreathing masksDispersed particle separationArchitectural engineeringMechanical engineering
Owner:萧县冠达新型墙体材料有限责任公司
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