61 results about "Upstream downstream" patented technology

The invention discloses a construction method of a flat shoal flow prediction model based on joint control of upstream-downstream borders over a lower reach. The construction method specifically comprises the steps of adopting a one-dimensional hydrodynamic model to calculate and study a water level-flow relation curve of each fixed section in the reach; determining flat shoal flow in each section according to flat shoal elevation in each fixed section; adopting a method based on the combination of geometric average of logarithmic transformation and weighted average of section spacing to calculate the flat shoal flow of reach dimension; analyzing a response relationship of the flat shoal flow adjustment on an upstream water-sediment condition and downstream water level change, and constructing the prediction model based on joint control of the upstream-downstream borders over the lower reach. According to the construction method of the flat shoal flow prediction model based on joint control of the upstream-downstream borders over the lower reach, the calculated and obtained flat shoal flow of reach dimension is capable of better describing the flow passing capacity of the whole reach, and thus the flat shoal flow is more representative; the constructed flat shoal flow prediction model is capable of well reflecting the variation trend of the flat shoal flow along with the upstream water-sediment condition when the downstream water level changes sharply, and thus the constructed flat shoal flow prediction model has a guidance significance in the flood prevention and riverway management.

A particulate matter accumulation amount detection apparatus includes a filter pressure loss detecting section, an incombustible component amount estimating section, an incombustible component accumulation state estimating section, and a particulate accumulation amount detecting section. The filter pressure loss detecting section is configured to detect an upstream-downstream differential pressure of an exhaust gas purification filter having a plurality of substrate walls. The incombustible component amount estimating section is configured to estimate an amount of an incombustible component. The incombustible component accumulation state estimating section is configured to estimate an accumulation state of the incombustible component on the substrate walls based on the engine operating state and the amount of the incombustible component. The particulate accumulation amount detecting section is configured to detect an amount of the particulate matter accumulated in the exhaust gas purification filter based on the upstream-downstream differential pressure and the accumulation state of the incombustible component.

The de-icing device is intended for the vane (10) of the inlet guide wheel (4) of a turbojet (2), comprising a fixed part (12) arranged on the upstream side and a mobile flap (18) arranged on the downstream side, in which said fixed part (12) comprises a trailing edge (16) substantially in the shape of a “U”, with one of the branches (162) being located on the intrados side (I) and the other branch (164) being located on the extrados side (E). It comprises at least one emission window (202), oriented substantially along an upstream-downstream direction, and arranged along the branch (162) of the “U” located on the intrados side (I) of the trailing edge (16).

The inlet guide wheel (4) vane (10) is equipped with at least such a de-icing device.

The aircraft engine (2) comprises at least one vane (10) equipped with such a de-icing device.

The invention discloses a method for combined measurement of permeability and porosity of a dense rock under dynamic confining pressure. A device for realizing the method comprises a confining pressure control device, a rock core pressure chamber, a downstream air cylinder, an upstream air cylinder, a pressure loading device, an upstream air pressure recorder, a downstream air pressure recorder, an upstream-downstream air pressure difference recorder and a computer. According to the method for the combined measurement of permeability and porosity of the dense rock under dynamic confining pressure provided by the invention, few physical quantities need to be measured, the operation is easy, and dynamic measurement of permeability and porosity under complex stress is realized. In addition, the method has the advantages that the measurement time is short and the accuracy is high for dense rocks with a permeability less than 10 to 17m<2> and a porosity less than 1.5%, and can automatically record the test data; the test result is accurate; the test efficiency is improved; and test data under different pressures are obtained to calculate the permeability and porosity at one time.

The invention provides an intersection vehicle trajectory reconstruction method based on data fusion from the electric police and a fixed-point detector. The method comprises: long queuing identification is carried out, wherein the long queuing means that the queuing length exceeds the detector position; upstream-downstream lane flow mapping is carried out; and intersection vehicle trajectory reconstruction is carried out based on a traffic wave theory. When the queuing length is close to the detector, the detector occupancy rate increases and the passing vehicle number is reduced; and the long queue is identified based on fixed-point detection data of the section based on changing characteristics of the flow and occupation rate. According to the invention, the intersection vehicle trajectory reconstruction method has the following beneficial effects: the method is based on detection conditions of most of cities in the country and the 60s-aggregate flowing density and speed data and detection frequency are provided, so that the dependence on the high-frequency floating car trajectory data is eliminated.

The invention discloses a Gantt chart generating method and system. The method comprises the following steps of: splitting project objectives, and acquiring work tasks carrying construction periods, wherein upstream-downstream relations exist among the work tasks; distributing each work task into a corresponding organizational unit; detailing the work task in each organizational unit, generating an internal Gantt chart in each organizational unit; and summarizing organizational units, and automatically displaying internal Gantt charts in the organizational units on the same interface, so as to obtain a whole Gantt chart of the project objectives. By adopting the method and system disclosed by the invention, hierarchical control among the organization units and independent drawing on the internal Gantt charts can be realized, and finally the internal Gantt charts are automatically summarized and the Gantt charts of the whole project are displayed by the system. Data isolation and effective sharing are realized, and large-scale data interaction with a database is avoided, thus performance and efficiency of the system are improved.

The invention relates to an oil-well low-liquid-producing high-water-containing oil-water-two-phase-flow flow measuring method. Two sets of sensors located in the same sensor pipeline are adopted to be combined for measuring, one set of sensors is an upstream-downstream electric conduction sensor array, and the other set of sensors is arc-shaped opposite-wall-type electric conduction sensors. Themethod comprises the following measuring steps that through the upstream-downstream electric conduction sensor array, upstream-downstream fluid fluctuating signals are obtained, the oil-water-two-phase-flow relevant flowing speed Ucc is calculated through a relevant algorithm, and the mixed flowing speed Um is obtained accordingly; through the arc-shaped opposite-wall-type electric conduction sensors, the normalized electric conduction rate Ge* is obtained, and the water holding ratio Yw and the oil holding ratio Yo are obtained through calculation accordingly; and the phase distribution coefficient C0 and bubble diameter index N in an oil water-two-phase-flow drifting model are determined, physical correlation between the mixed flowing speed Um and the oil phase appearance flowing speed Uso as well as the oil holding ratio Yo and the oil phase appearance flowing speed Uso is achieved, and measuring of the oil phase appearance flowing speed Uso is achieved; and the water phase appearance flowing speed is obtained.

The invention discloses an intersection traffic flow feature parameter extraction method based on license plate data. The method comprises the following steps: 1, acquiring the license plate data detected by an intersection bayonet type electronic police in a road network, and acquiring a bayonet type electronic police equipment and intersection comparison table and a road segment and upstream-downstream intersection comparison table; 2, acquiring a run-off feature parameter of each detected vehicle; 3, adding passing information of the vehicle at an upstream intersection after each piece of passing data; 4, computing to acquire a vehicle arrival feature parameter of each passing data at the road segment upstream intersection; 5, respectively extracting driving feature parameters of the detected vehicle, the nearest vehicles which are in front of and behind the detected vehicle, in the same period with the detected vehicle and has a passing record at the upstream intersection; and 6, complementing the road segment travel time of the vehicle according to the obtained vehicle run off, arrival and driving feature parameters so as to obtain a traffic state of the road segment, uploading the traffic state to an intersection signal machine, and then adjusting the intersection signal time assignment.

The invention relates to a filling connector which includes a body (2) defining an inner filling circuit (6) between an upstream end (3) and a downstream end (4), the connector including a valve (7) for mobile isolation relative to a seat (8) between an upstream position for closing the circuit and a downstream position for opening the circuit, the connector (1) also including a dust valve (10, 100) positioned upstream from the isolation valve (7), characterised in that the dust valve can be moved selectively downstream, either to a first predetermined downstream position, referred to as a 'contactless' position, opening the upstream end of the circuit, and in which the downstream end of the dust valve does not push the upstream end of the isolation valve, or to a second predetermined downstream position, referred to as 'contact' position, opening the upstream end of the circuit, and in which the downstream end of the dust valve pushes an upstream end of the mobile isolation valve, the dust valve comprising one or more passages (103) for guiding at least one portion of the stream of fluid passing through the body of the dust valve (10) from the upstream end (3) to the downstream end; the dust valve including first (10) and second (100) concentric parts capable of being moved relative to one another in the upstream-downstream direction.

The invention discloses a method for constructing a foundation base of a junction dam. The method includes the steps that weak stratums in directly-bearing stratums of a middle-low water head dam are excavated out, and then the foundation base is excavated according to the burial depth of the middle-low water head dam. A method for determining the burial depth of the middle-low water head dam includes the following steps of a, determining the downstream water depth, the maximum discharge per unit width at the tail end of a protection apron and the upstream-downstream water level difference according to engineering design requirements, and initially calculating the theoretical burial depth of the middle-low water head dam; b, sampling, testing and analyzing bed rock in an area below the dam to obtain the anti-scouring flow speed of the bed rock; c, calculating the maximum scouring depth of the area below the dam in the natural state; d, correcting the theoretical burial depth of the middle-low water head dam according to the scouring depth of the area below the dam, and determining that the burial depth of the middle-low water head dam is the sum of the scouring depth and the theoretical burial depth. The method has the advantages that the scouring depth of the local portion below the dam can be accurate foreseen, the burial depth of a hydraulic structure can be reasonably set, and the service life of a hydroelectric junction project can be prolonged.

The invention relates to a wellhead gas-liquid two-phase flow metering method and device. The device mainly comprises an ultrasonic transducer device integrating a bidirectional transceiving function, a filter amplifier, a threshold value comparison circuit, a liquid level sensor and a temperature sensor. The method includes that by adopting a novel mutual correlation algorithm, upstream-downstream time difference of an ultrasonic transducer can be calculated to detect and compensate originally measured time difference; a correlation algorithm based on discrete Fourier transformation is adopted for collected ultrasonic envelope signals to calculate a correlation value, a maximum correlation point is found out, time difference is calculated, time compensation is performed on a timer to acquire final time difference, and flow of gas phase and liquid phase in wellhead gas-liquid two-phase flow can be calculated according to liquid level, temperature and pipeline parameters measured by the sensors. The method is safe and harmless, free of causing disturbance to fluid, good in performance, low in cost, capable of effectively improving wellhead collecting and metering accuracy and high in reliability and stability.

A walking-beam conveyor for stepped transport of heavy objects has an upstream beam extending in a horizontal transport direction and adapted to carry a plurality of the objects. A pair of horizontally spaced upstream supports underneath the upstream beam are associated with respective vertical and horizontal upstream drives for raising the upstream beam relative to the supports, shifting the upstream beam a step downstream, lowering the upstream beam, and shifting the upstream beam a step upstream to shift the objects on the upstream downstream in steps. In accordance with the invention a downstream beam immediately downstream of the upstream beam has an upstream end juxtaposed with a downstream end of the upstream beam with a single downstream support under the downstream beam. A pivot connects the downstream end of the upstream beam to the upstream end of the downstream beam for joint synchronous vertical and horizontal movement of the two beams.

The invention discloses a vacuum filter, and belongs to the field of filtration, which is used for solving the problems of cooling and dedusting of high-temperature and dust-contained gas in a vacuum working system. The vacuum filter comprises a cavity body, a diffuser and a filter element, wherein the cavity body is provided with a gas inlet connected with a specific gas pipeline and a gas outlet connected with a vacuum pump; the top end of the cavity body is provided with a top cover connected with the cavity body in a sealed mode; the cavity body is internally provided with the diffuser at the gas inlet; the filter element is installed at the center in the cavity body; the side wall of the filter element is provided with filter holes; the bottom surface of the filter element is provided with an opening leading to the gas outlet of the cavity body, thereby preventing the vacuum pump and an upstream-downstream system from being damaged by high-temperature, corrosive and dangerous dust particles, and solving the problem of too complex and frequent maintaining frequency of the vacuum pump of the vacuum filtration system. From the aspect of environment protection, gas in pipelines can be further cooled down and purified, and air pollution can be reduced.

The invention relates to a pedestrian crossing control system and method based on upstream-downstream signal intersection coordination. Timely response to road segment pedestrian crossing can be ensured, trunk line coordination effect of adjacent upstream-downstream signal intersections can be guaranteed, reminding of pedestrian crossing waiting passing countdown can be realized to assist pedestrians in safe crossing, and impact on trunk line coordination control effect is reduced. The system comprises a pedestrian crossing signal triggering device, signal countdown equipment, a signal machinecontrol subsystem and a central optimized control subsystem. When receiving a pedestrian crossing request signal, the signal machine control subsystem sends information to the central optimized control subsystem, the central optimized control subsystem generates pedestrian crossing signal timing plan information and countdown information in real time, and the signal machine control subsystem controls on-off and lamp color conversion of signal lamps according to the pedestrian crossing signal timing plan information and forwards the countdown information to signal countdown equipment for display.

A linear motion, reciprocating vacuum packaging apparatus and method. Articles to be packaged are advanced in linearly in an upstream-downstream direction, such as by a platen conveyor. A linearly movable, reciprocating vacuum system includes a series evacuation chambers (116a-c), each of which is moved into engagement with one of the platens so that the article enclosed within the evacuation chamber (FIGS. 1 and 2).

The invention discloses an underflow landscape green land system with a concentric structure (concentric circle, concentric ellipse, concentric square, concentric polygon, and the like) for deeply disposing small-scale distributed domestic sewage. The system consists of four to six concentric partition walls, an inner waterproof mortar or a waterproof concrete; the height of the wall is declined from inside to outside along with the hydraulic gradient; rough large lime stone or dolomite particles, thin lime stone or dolomite particles and sand-containing soil are sequentially filled between the partition walls from bottom to top; a water distribution pipe is embedded in the partition wall; the system operation adopts the circulation manner of upstream-downstream-upstream to distribute water; a water inlet pipe and the water distribution pipe are embedded in a filling layer; green plant is grown on the soil; an outer circle is provided with an ecological catchment channel in which natural biological fillers such as cobblestones and dimension stones are arranged; emergent aquatic plants can be planted; yielding water in the outer circle landscape green land is in water-dropping aeration when entering the ecological catchment channel; and the quality of the yielding water can be improved through further biological contact and oxidation. The subsequent blockage of the landscape green land is prevented just by regularly cleaning the first-level filler filter bed with the least area. By using the system to process small-scale domestic sewage, the invention has the advantages of even water distribution, good treatment effect, low operation cost, stable operation, attractiveness, low maintenance load, no secondary pollution, and the like. The invention is suitable for promotion and application in disposing distributed domestic sewage in countryside, small towns and residential communities.

The invention provides a multi-motor-driving frequency-converting energy-saving device based on a common DC bus and a pumping unit. The multi-motor-driving frequency-converting energy-saving device based on the common DC bus includes a power grid, a transformer, an integrated PWM rectifying device, the common DC bus, more than one inverter device and more than one motor being driven. A three-phase AC current output by the power grid is connected to the input terminal of the transformer; the output terminal of the transformer is connected to the input terminal of the integrated PWM rectifying device; the output terminal of the integrated PWM rectifying device is connected to the input terminal of the common DC bus; the output terminal of the common DC bus is connected to the input terminals of the more than one inverter device; and the output terminal of each inverter device is connected to the input terminal of one motor only. By using the multi-motor-driving frequency-converting energy-saving device based on the common DC bus, an energy regeneration problem of the motor caused by large starting torque, light operation load, high transformer configuration capacity and upstream-downstream unbalance of a conventional pumping unit is solved; the purpose of saving energy is realized; and meanwhile, power factors are increased, reliability of the system is improved and the cost of the system is reduced.

The invention discloses a quick measurement method for cambered-inward steel box arch bridge main arch rib segments. The quick measurement method includes the steps of S1, selecting and marking each segment measure point of one steel box arch rib; S2, defining a tangent line coordinate system for measurement of the arch rib of the bridge, and by taking the center of the main bridge as the originalpoint, the mileage direction as the x axis, the upstream-downstream direction as the y axis and the elevation direction as the z axis, arranging a total station at a guide control point which can sight the steel box arch rib; S3, mounting a first segment of the steel box arch rib; S4, mounting a second segment of the steel box arch rib, to be specific, roughly positioning the second segment of the steel box arch rib through a positioning device, arranging prisms at marked portions or all measure points of the steel box arch rib, finely adjusting mounting position of the second segment of thesteel box arch rib to a certain error range so as to complete mounting of the second segment of the steel box arch rib; S5, repeating the step S4 until completing measurement and mounting of all steelbox arch ribs. With conversion of the coordinate system, speed of measurement of the main arch rib segments can be increased greatly.

The invention discloses a prediction method of monthly power consumption. The method comprises the following specific steps: step one, screening an industry index according to Pearson's correlation coefficient; step two, random forest training and predicting. The industry index with strong relevancy relation with the power consumption is screened by combining with the Pearson's correlation coefficient according to the upstream-downstream industry chain condition of each industry by use of each important industry as the point of view; and then the random forest training and modelling are performed on the screened industry index and the industry power consumption, thereby predicting the monthly power consumption of each industry of the important industries; the prediction method comprises thinning a prediction object to each important industry and thinning the prediction time to month, thereby contributing to sufficiently master the monthly power consumption condition of each industry by a forecaster; and meanwhile, the economy and the industry factors are effectively integrated into the power consumption prediction under the fast-changing economic situation, the influence over the power consumption by the economic structure change is sufficiently considered, and the power consumption development trend is immediately and accurately mastered.

The invention provides a device for generating a test functional chain. The device comprises a relation table generation unit and a combining unit, wherein the relation table generation unit is used for reading operation relation data of a data table which is recorded in a design document corresponding to functions; extracting key information according to the operation relation data and storing the key information into a relation table so as to generate the relation table and transmit the relation table to the combining unit; and the combining unit is connected to the relation table generation unit, and is used for identifying an upstream-downstream relation between the functions on the basis of the key information in the relation table and combining the relative functions to form the test functional chain according to the upstream-downstream relation. The invention further provides a method for generating a test functional chain. According to the technical scheme disclosed by the invention, the device and the method can be applied to the complex application fields, the test coverage ratio is ensured and is not influenced by artificial influence factors, the function test efficiency is improved and the test cost is reduced.

The invention discloses a method and a system for configuration production of a work flow, wherein the method is as follows: obtaining the current business process data array, and ensuring the upstream-downstream relationship of the various business process data in the current business process data array; obtaining the business process corresponding to the business process data in the preset planning data array; ensuring the upstream-downstream relationship of the various business document data in the preset planning data array; obtaining the upstream-downstream relationship of associated various business processes according to the business document data for ensuring the upstream-downstream relationship; producing corresponding production processes through configuration and various business processes with ensured upstream-downstream relationship. The method and the device disclosed by the invention can overcome the problem in the prior art that during the production process, the business process data and the business document data are configured repeatedly, and the business process is complicated and long, and the system power consumption is increased. The method and the device achieve the process of configuring production process with a single unit of programs, and reduce the power consumption of the system while simplifying the production process of the product.