31 results about "Joint influence" patented technology

The invention discloses a Kaplan turbine adjusting system dynamic model suitable for electric power system analysis, which comprises a speed governor model, a guide vane control system model, a blade control system model, a water turbine model and a water diversion system model, wherein the guide vane control system model and the blade control system model forms a Kaplan turbine dual adjusting system, the blade control system model takes a combined relationship existing between guide vane opening degrees and blade opening degrees into account, and the combined relationship is obtained by adopting a quintic polynomial curve fitting method; and the water turbine model takes the correction function of blade angles on water turbine efficiency into account on the basis of analyzing non-linear models, the mechanical power output of the water turbine model is affected by the guide vane opening degrees and blade opening degrees together, and the nonlinearity between the guide vane opening degrees and the mechanical power is metered and is described by adopting cubic polynomial fitting. The Kaplan turbine adjusting system dynamic model is exquisite and clear in structure, has distinct and easily-obtained model parameter meanings, is fast and efficient in modeling process, and has high practicability.

The invention provides an obstacle trajectory prediction method and device and unmanned equipment. According to one specific embodiment of the invention, the method comprises the following steps: for each target moment in a plurality of target moments in a future preset time period, executing the following operations to predict a track point of each obstacle in a plurality of obstacles at the target moment: determining the positioning information of the unmanned equipment and each obstacle at the previous moment of the target moment; determining a global interaction vector of the previous moment based on the positioning information, wherein the global interaction vector is used for representing common influence factors of the unmanned equipment and the plurality of obstacles on motion; and predicting a track point of each obstacle at the target moment based on the global interaction vector. The future track of the obstacle predicted by the method is closer to the actual track, so that the path planning result of the unmanned equipment is more reasonable.

The invention relates to a method and a device for controlling the vibration in an automobile hierarchical modeling manner. The method comprises the following steps: sending the data of eight vertical and lateral road roughness sensors to a CPU processor, integrating the hierarchical modeling algorithm and obtaining the motion state of the centroid of suspended mass, the constrained force of suspended mass, and acceleration predictive values obtained by predicting and decoupling the vertical and lateral acceleration variable quantities of No.1 to No.4 suspension brackets, through the operation; respectively transmitting to eight vertical and lateral matrix control quantity operation module of No.1 to No.4 units; obtaining theoretical quantity of controllable actuators of No.1 to No.4 units after the synthesis is conducted; conducting the conversion operation of actuating quantity because the data received by each actuator generates the corresponding action. The invention has the advantages that the hierarchical control architecture built on the basis of considering the common influence of the vertical excitation and the lateral excitation of the road is converted into eight four-multiplied-four matrix, so as to simultaneously conduct the control quantity operation of four controllable actuators and the vibration control, thereby reducing online operation time and reaching the optimum vibration control effect of the whole automobile.

The invention provides a sequential multi-antenna selectable transmitting method for code-division multi-path channel. The sequential multi-antenna selectable transmitting method is used for the combined antenna selection and beam shaping of a TD-HSPA+ and comprises the steps of replacing the downlink practical wireless multi-path channel parameters with the obtained uplink channel parameters; calculating the equivalent channel related matrix of a system; selecting the transmitting antenna to join in the data transmission by a sequential way; selecting the transmitting antenna according to the second characteristic value criteria of maximum equivalent channel related array; after selecting the antenna, calculating the related array RK of the selected antenna; carrying out beam shaping according to the characteristic vector of the RK and sending data stream. The sequential multi-antenna selectable transmitting method meets the experience truth that the system performance mainly depends on the data path of the dual streams with the worst sending channel quality, sufficiently considers the common influence factor of the multipath channel is sufficiently considered, and the system performance is improved greatly. Furthermore, according to the sequential antenna selecting method, the practical complexity the simplified and the feasibility is improved.

The invention discloses a three-axis fluxgate aeromagnetic measurement system based on a vertical take-off and landing aircraft with fixed-wings, and a correction and compensation method therefor. Themethod comprises the steps of: pre-collecting a series of three-axis fluxgate digital output readings generated by the change of the attitude as a numerical input, solving a nonlinear least squares equation set to obtain 12 compensation parameters having a common influence on the three-axis fluxgate magnetometer; and storing the obtained compensation parameters into a multi-data synchronous acquisition and correction compensation system, and performing real-time and post-flight correction compensation on the vector magnetic field and the total field data obtained by the line-measurement of the aeromagnetic flight by using a compensation algorithm. According to the three-axis fluxgate aeromagnetic measurement system and the correction and compensation method therefor, the intensity data ofthe total magnetic field after being corrected is obtained without the need of the optical pump magnetometer, so the three-axis fluxgate aeromagnetic measurement system is suitable for light and small drone platforms. The magnetometer is integrated into the mission compartment of the drone, and the protection is in place, and the disassembly and assembly is convenient. The compensation algorithmused greatly improves the accuracy of the three-axis vector high-precision magnetometer and greatly reduces the noise of the system.

The invention discloses a method of structure fracture and ground settlement deformation decomposition based on force source inversion. Firstly, time-sequence interference processing is carried out onan SAR image of a study area to obtain a corresponding annual average deformation rate or a deformation time sequence; then a deformation area comprehensively influenced by ground settlement and structure fracture is selected for relevant parameter setting of an inversion model; then gridding is carried out on the inversion model, a compression amount of each grid is calculated through a Green'sfunction and a linear least square method with an additional constraint condition, and the Green's function is combined to obtain ground settlement caused by groundwater exploitation by forward modeling; and finally, ground settlement deformation obtained by restoration is removed from ground surface deformation obtained by InSAR technology, and ground surface deformation caused by structure fracture is obtained. The method has guiding significance for disaster formation modes, disaster prevention and disaster reducing of geological disasters in research areas where structure fracture deformation and ground settlement deformation comprehensively appear and generate influences together.

The invention discloses an overflow cut-off valve. Under the condition that a fuel tank is positioned at normal air pressure, gas inside the fuel tank exchanges with external gas through a gas outlet hole; under the condition that greater negative air pressure exists inside the fuel tank, the external gas bursts through a rubber assembly to enable each gas inlet channel to be conducted with a pressure-maintaining plastic part inner cavity; the external gas enters the fuel tank through the gas inlet channels. According to the overflow cut-off valve disclosed by the invention, gas outlet channels and the gas inlet channels are separated without mutual influence; the sizes of the gas outlet channels and the gas inlet channels can be respectively designed, so that the gas inlet channels and the gas outlet channels can be suitable for fuel tanks of vehicles with different powers and different sizes. The fuel tanks of the vehicles with the different sizes have little influence on a gas outlet hole in an annular convex rib because the fueling speed of the fuel tank cannot change due to the change of the size of the fuel tank. The gas inlet channels and the rubber assembly commonly influence the gas inlet speed at negative pressure, so that the air inlet speed can be slightly adjusted according to the gas inlet channels and the rubber assembly to meet the requirements on the fuel tanks with the different sizes.

The invention discloses an energy-efficient networking method in a heterogeneous sensor network, and belongs to the technical field of wireless sensor networks. According to the method, cluster head election is carried out based on neighbor information and residual energy Ei of each node, and the structure scale of a cluster is determined; a self-adaptive cluster scale networking mode based on energy efficiency is adopted. The physical radius of the cluster is reduced while the communication distance is met, so that the single-hop communication distance of the node is short and effective, andthe unreasonable situation that in probability election, the node capacity is not equal, but the opportunities are equal to that of selecting cluster heads is broken through by providing a cluster head election mechanism under the joint influence of energy and neighbors; a concept of adaptive value radius is introduced, and a cluster head communication distance is dynamically controlled to adjustthe structure and scale of the cluster; the communication cost between the cluster heads is calculated to serve as the basis of communication path selection, the utilization efficiency of node energyin the random heterogeneous sensor network is improved, and the effect of reducing communication energy consumption is achieved.

The invention relates to a wall-paper-simulated diatom ooze construction method. The construction method comprises the following steps that a diatom ooze basement layer is smeared on a wall basement layer; a diatom ooze printing layer is printed on the diatom ooze basement layer through a silk screen mold; a diatom ooze coating layer is sprayed on the diatom ooze printing layer through an airless spraying machine. Compared with the existing wall decoration material construction technology, the construction method has the advantages that construction is performed totally with diatom ooze, and any harmful substances are not contained; compared with an existing diatom ooze construction technology, the modeling ability is higher, colors and patterns are richer, the same decoration effect as that of wall paper can be achieved, and joints influencing the esthetics in wall paper construction do not exist; the surface is smooth, the texture is fine and smooth, the colors are soft, the patterns are diverse, the phenomena of discoloring and cracking cannot occur in long-term use, and the construction method is more suitable for indoor decoration.

A method for evaluating the deformability of a nickel-based alloy containing composite point defects. Considering the influence of vacancy and solute atoms on the generalized stacking fault energy ofnickel-based alloys, Fully considering the establishment of supercell model, the deformability of Ni-based alloys with composite point defects is evaluated by the calculation of generalized stacking fault energy. The method includes the following steps: firstly, determining the most stable relative positions of vacancies and solute atoms in Ni-based alloys; secondly, establishing a supercell modelfor calculating that generalize stacking fault energy of the nickel-based alloy; thirdly, the generalized stacking fault energy of Ni-based alloys containing vacancies and solute atoms being calculated; in the fourth step, the plastic deformation behavior is evaluated according to the generalized stacking fault energy. The invention fully considers the important parameters which can influence thestructure model when establishing the model, including the vacuum layer thickness, the atomic layer number and the relaxation system, effectively prevents the calculation result deviation caused by the unreasonable structure model in the calculation process of the generalized stacking fault energy, improves the calculation efficiency and reduces the calculation cost.

The invention provides a positioning method and apparatus based on hotspot groups. The method comprises the following steps: dividing hotspots in a positioning area into a plurality of hotspot groups,wherein each hotspot group at least comprises two hotspots; setting sampling points corresponding to the hotspot groups; selecting a first target hotspot group; detecting whether a to-be-positioned point is matched with at least one sampling point corresponding to the first target hotspot group; if so, determining the location information of the to-be-positioned point according to the location information of the sampling point; and if not, selecting other hotspot groups for positioning. According to the method, the hotspots in the positioning area are divided into the plurality of hotspot groups, and the sampling point is determined according to the hotspots in the hotspot group, as the sampling point has correlation with the hotspots, the hotspots in the hotspot group can affect the matching result of the sampling point and the to-be-positioned point together, therefore when a certain hotspot in the hotspot group is abnormal due to external factors such as shielding or the like, thesampling point cannot be matched with the to-be-positioned point, so that the abnormal sampling point is excluded to avoid negative influence on the subsequent positioning.

An embodiment of the invention provides a method and a device for modeling closed-loop control systems. The method includes establishing state space representation forms of the closed-loop control systems; determining uncertain gain matrixes of the state space representation forms according to mapping relations between the uncertain gain matrixes and preset thresholds; determining feedback gain matrixes of the state space representation forms according to stability conditions of dissipation systems; building system models of the closed-loop control systems according to the uncertain gain matrixes, the feedback gain matrixes and the state space representation forms. Each state space representation form comprises a disturbance term, and the disturbance terms are used for representing joint influence of modeling errors and unknown disturbance on the systems. The method and the device for modeling the closed-loop control systems have the advantages that the dissipation characters of the closed-loop control systems are considered, and accordingly the robustness of the closed-loop control systems can be improved.

The invention discloses a comprehensive evaluation method for dynamically analyzing endogenous and exogenous multi-gas pollutants, comprising the steps: recording the operating conditions of the equipment and the discharged data of polluting gases during industrial production; based on an improved environmental exergy analysis theory and an intuitive environmental analysis method, classifying thepolluting gases according to the discharged data; fitting the classified polluting gas discharged data by means of software to obtain a fitted curve; processing the polluting gas discharged data by using an equivalent carbon dioxide method, and collectively quantifying the influences of different polluting gases on the environment; and giving targeted suggestions for improvement based on the interaction between equipment and the common influence of polluting gases on the environment. Based on the improved environmental exergy analysis theory in combination with the dynamic fitting and unifiedquantification method, the method comprehensively evaluates a variety of industrially emitted polluting gases, can show the environmental impact caused by the interaction between equipment in the industrial production process, and dynamically analyzes and quantifies the environmental impact of multiple gaseous pollutants.

The embodiment of the invention provides a load balancing method and system based on an LWIP architecture, and the method comprises the steps: obtaining the signal-to-interference-and-noise ratio of user equipment at a current moment, and calculating the qualified rate of the signal-to-interference-and-noise ratio according to the signal-to-interference-and-noise ratio; obtaining a channel utilization rate and a time delay parameter of a cell to which the user equipment belongs at the current moment, and calculating to obtain a multi-parameter joint influence threshold value according to the signal to interference plus noise ratio qualification rate, the channel utilization rate and the time delay parameter; and calculating to obtain a preset dynamic threshold according to the multi-parameter joint influence threshold and an initial fixed threshold, judging that the cell to which the user equipment belongs currently is in an overload state according to the preset dynamic threshold, andswitching the user equipment to an adjacent cell if a switching condition meets a preset condition. According to the method and the system provided by the embodiment of the invention, proper networkconfiguration and management are provided, the load states of the current overload cell and the candidate target cell can be estimated, and the switching of the UE is decided, so that the load can beeffectively distributed.

The invention discloses a method for turning off a palm image recognition device. The method comprises the following steps: comparing an obtained current image in an image acquisition area with a previous image; if similarity between the current image and the previous image is lower than a preset first index, turning off a light supplement lamp; detecting whether the image acquisition area has an object through probe light; and if the image acquisition area has no object, turning off the palm image recognition device. The technical problem that the palm image recognition device is turned off by mistake or an image sensor keeps collecting palm images since it is difficult to determine whether a palm quits the image acquisition area under joint influence of the light supplement lamp and stronger ambient light is solved.

According to the invention, a soil sample mass m is monitored and recorded in real time; a mass loss rate curve of the soil sample is obtained; and the analysis is carried out to obtain VOCs thermal desorption kinetic parameters. Therefore, problems that the thermal desorption process is complicated and can not be analyzed and studied easily under the joint influences of various superposed factorsand various VOCs on the condition of simultaneous existence of various VOCs in soil are solved. On the basis of repeated and interactive attempting of two parameters including the air flow rate and soil heating temperature, appropriate and economical values can be obtained. With the provided method, the kinetic processes of the VOCs at the two stages of thermal desorption of in soil can be clearly studied and distinguished and fitting is carried out to obtain relevant parameters, so that the useful parameters and guidance are provided for the VOCs-contaminated soil under thermal desorption treatment.

The invention provides an analysis testing method for foam characteristic excess reason of a power steam turbineengine oil. The analysis testing method comprises the two steps: after regenerating the steam turbine engine oil with exceed foam characteristic, detecting the foam characteristic index and detecting the foam characteristic index after a defoaming agent is added. According to the analysis method, the following three reasons for the excessive foam characteristic of the power steam turbine engine oil are one of 1. the influence of degraded products, generated due to deterioration of oil quality, on the foam characteristic; 2. the common influence from the degradation products contained in the oil and the missing of the defoaming agent; and 3. loss of the defoaming agent. The analysis testing method is simple and convenient, mild in conditions, easy to operate, accurate in results, and suitable for analyzing the foam characteristic excess reason of a power steam turbineengine oil, so that the optimal solution for the characteristic excess reason of a power steam turbineengine oil can be determined.

The invention relates to a novel floating positioning horizontal broaching plate for a broaching machine. The phenomenon of extremely poor end jump and radial jump of the end face and outer circle of a finally broached part which is detected by taking own internal spline as a reference usually due to the fact that the broaching force of a broaching tool is not overlapped with the center line of a positioning outer circle under the gravity coaction of the weight of the broached part and the weight of the broaching tool when the part is broached by a conventional horizontal broaching machine is eliminated, and a quick changing bushing matched with the size of the outer circle of the broached part is adopted for implementation. With adoption of such a structure, the joint influence of the self weight of the broached part and the weight of the broaching tool is eliminated, and when the specification of the part to be broached is replaced, only the quick changing bushing matched with the size of the outer circle of the part to be broached is required to be replaced. In addition, perpendicularity between the center line of a broached internal spline and the end face of a positioning reference can also be ensured, the accuracy requirement of the broached part is met, and practicability, high efficiency and stable quality are ensured.