745results about How to "Simple design method" patented technology

The invention relates to a wellbore trajectory control method which is mainly used for solving the problem that the existing wellbore trajectory control method can not well meet the design and control requirements of oil and gas drilling on a wellbore trajectory. The wellbore trajectory control method is characterized by comprising two parts, namely the design of the wellbore trajectory and the control of the wellbore trajectory. By adopting the method, the design and control requirements on the wellbore trajectory which can simultaneously limit the position and the direction of a target point under multi-constraint conditions can be met; and the design and control method is simple and practical, the optimization and the control of the wellbore trajectory are easy, the design efficiency and the quality of a well body can be improved, the time and the cost of drilling operation can be reduced, and the purposes of safe, fast and high-quality drilling and completion operations can be realized.

The invention belongs to the field of gas field development and research and particularly relates to a fracturing fracture geological design method of a horizontal well of a dense gas field. The design method takes influences of factors, such as positions of fracturing fractures, arrangement modes of the fracturing fractures, lengths of the fracturing fractures, intervals of the fracturing fractures, and flow conductivity of the fracturing fractures, into account at the same time, a quantitative geological design model of the lengths of the fracturing fractures, the intervals of the fracturing fractures, the flow conductivity of the fracturing fractures is established based on the reservoir permeability, and the blank of the quantitative geological design of the fracturing fractures of the horizontal well is filled. The fracturing fracture geological design method of the horizontal well of the dense gas field is simple, strong in maneuverability, effective and practical when used for guiding fracturing fracture geological design of multistage fracturing horizontal wells of the dense gas field, and the fracturing fracture geological design method of the horizontal well of the dense gas field has good popularization and using value.

The invention discloses a distributed multi-mobile-robot formation control method based on ESO, comprising steps of 1) performing modeling on a multi-mobile-robot to obtain a distributed discrete state space deviation model of a multi-mobile-robot, 2) designing a performance index according to the distributed discrete state space deviation model of the multi-mobile-robot and calculating a prediction control quantity of the subsystem, 3) designing an extension state observer of the mobile robot to obtain a disturbance estimation value of the mobile robot, and 4) utilizing the obtained disturbance estimation value to design a combination controller based on the extension state observer. The invention provides a distributed multi-mobile-robot formation control method which is simple and easy to implement, and has a good anti-interference capability.

The invention provides a polarization beam splitter rotator and a design method thereof. The polarization beam splitter includes a double-layer trapezoidal mode converter and a reverse tapered coupler which are connected in series; the double-layer trapezoidal mode converter converts a transverse magnetic wave zero-order mode into a transverse electric wave first-order mode, and the reverse tapered coupler converts the transverse electric wave first-order mode into a transverse electric wave zero-order mode. The width of a first trapezoidal waveguide and a second trapezoidal waveguide is selected, and according to a relation between waveguide length and mode conversion efficiency, the length of the first trapezoidal waveguide and the second trapezoidal waveguide is determined; and the width of a third trapezoidal waveguide and a fourth trapezoidal waveguide is selected, and according to a relation between the waveguide length and mode conversion loss, the length of the reverse tapered coupler is determined. Characteristics of large working bandwidth, high conversion efficiency and high manufacturing tolerance and the like are realized through parameter optimization, the polarization beam splitter rotator can be used for improving practicability of a single-fiber three-way multiplexer, in addition, a manufacturing method is simple, is compatible with a standard silicon photon processing technological process, and the polarization beam splitter rotator and the design method thereof have relatively high practical value and good application prospects.

The invention relates to a method for designing a personalized interbody fusion cage. The metod comprises the following steps of performing CT (computed tomography) scanning on a vertebral body; performing three-dimensional model reconstruction on CT continuous section image data; measuring a vertebral body model, namely measuring the sagittal diameter of the vertebral body, the transverse diameter of the vertebral body, the height of vertebrae interval and the like; performing personalized design and implantation on the interbody fusion cage on the basis of the measured parameters; meshing and smoothening; performing material assignment, boundary condition setting and the like to establish a finite element model; solving and analyzing the finite element model. The method provides a basis for the optimization and the improvement of the interbody fusion cage and the personalized interbody fusion cage is designed by considering geometric matching and function matching.

The invention discloses a method for training sequence design and channel estimation of a transmitting diversity block transmission system based on a training sequence and a transmission system thereof. The method comprises the following steps: space time, space frequency, space code or combination thereof is selected to design a training sequence corresponding to all antennas according to the characteristics of the transmission channel; a transmitted end transmits the training sequence and the data to be transmitted by a plurality of antennas; a receiving end uses a received signal to construct a cyclic convolution of the training sequence and the channel impact response of the transmitting end to the receiving end; the channel impact response or the channel frequency response of the transmitting end to the receiving end is estimated according to the characteristics of the training sequence and then post processing is carried out. The design method for training sequence is simple, and the channel estimation method has low complexity and is characterized by channel self-adaptation and the like.

The invention provides a methylation high-flux detection method, particularly a method combining sequence capture and bisulfite sequencing. The method can accurately and effectively analyze target area methylation states in several samples at the same time, lower the difficulty of probe design, enhance the feasibility of operation and application, and implement high-flux high-precision methylation detection on interested target sequences and regions in the total genome. The method has the characteristics of strong pertinence and cost and time saving.

The invention provides a frequency calibration circuit and a method thereof. The frequency calibration circuit comprises a phase lock loop circuit, an M-dividing divider for generating a plurality of phase signals, a sampling circuit for sampling on the rising edges of the phase signals, a first counter for counting reference frequency signals, a second counter counting first phase signals, a logical control circuit for comparing a count value with a target count value to obtain a minimum difference value, and looking up a control bit of a voltage-controlled oscillator through the difference value, and a comparison circuit for judging whether the control voltage of the voltage-controlled oscillator is in a set range or not. The method comprises the following steps: sampling the reference frequency signals to obtain a total count value; comparing the total count value with a target count value; selecting a next resonance line according to a binary lookup flow till binary lookup ends; and outputting a resonance line corresponding to a minimum error in order that the output frequency of the voltage-controlled oscillator reaches a required value. Through adoption of the frequency calibration circuit and the method thereof, the speed and accuracy are increased, and the requirement on the working frequency of a digital circuit is lowered, so that a design method is simplified.

The invention relates to a Backlash self-adaptive filter and a method for modeling and compensating the hysteresis thereof, belonging to the technical field of modeling and control of hysteresis non-linear systems. The filter comprises a summator module, an error calculating module, a plurality of self-adaptive weighting modules and a plurality of Backlash operator modules with the same width. The whole designing scheme avoids using a hysteresis item and is only related with current inputs, meanwhile, the hysteresis non-linearity can be reflected, and the modeling effect is more precise; and the self-adaptive inverse control of the filter can effectively compensate the hysteresis non-linearity of a piezoelectric ceramic actuator. The self-adaptive filter and the modeling and self-adaptive inverse control method based on the filter can be applied to systems having the characteristics of hysteresis non-linearity, such as intelligent materials of magnetostrictive materials, excitation motors, piezoelectric chips, piezoelectric ceramics, and the like.

The present invention relates to an ultra-wideband filter with simplified left hand transmit line structure which belongs to field of microwave communication equipment. The filter comprises of input port, output port and at least one microstrip transmission line structure cell on PCB board. Feeders of input port and output port are connected with the first and the last microstrip transmission line structure cell respectively by microstrip transmission line of 50 ohmic. Each microstrip transmission line structure cell can be equivalent to cascade of inductance in serial, capacitance in parallel and inductance in serial, wherein, the inductance in serial and capacitance in parallel can be realized by narrow microstrip transmission line and board microstrip transmission line, inductance in parallel is realized by narrow microstrip transmission line whose end passed the metal through hole to grounding. The filter of present invention has easy design, convenient production, small dimension and better out-band and in-band filtering capability.

The invention discloses an attack time and attach angle constrained guidance strategy. The attack time and attach angle constrained guidance strategy comprises the following steps of using a two-dimensional horizontal plane where a missile and a target are located as an attack plane, establishing a missile and target mathematical model and acquiring a missile sight angle second-order dynamic equation; designing the guidance strategy based on a virtual collision point, dividing the guidance process into two stages, designing an attack angle constrained guidance law based on the virtual collision point for the first stage and designing a proportional guidance law for the second stage; designing a switching strategy of the attack angle constrained guidance law and the proportional guidance law based on the virtual collision point; and adjusting the location of the virtual collision point. By means of the guidance strategy based on the virtual collision point, there is no need to conduct linearization and differential equation conversion based on the cross-range on the model and depend on estimation on remaining time information; the attack time and attach angle constrained guidance strategy is applicable to target moving tasks under multiple constraint conditions and has the characteristics that the design method is simple, and the applicability is high.

The invention discloses a degradable lamellar Zn-Mg composite material and a preparation method thereof. The outer layer of a lamellar medical metal composite material is made of pure zinc or zinc alloy, and the core part of the lamellar medical metal composite material is made of pure magnesium or magnesium alloy; the ratio of zinc or zinc alloy and magnesium or magnesium alloy is calculated according to volume percentage, zinc or zinc alloy accounts for 20%-50% of the total volume of the material, and the balance is magnesium or magnesium alloy. The lamellar composite material is prepared bycombining layered casting with nested extruding. The degradable lamellar Zn-Mg composite material has the advantages that: the selected magnesium alloy and the selected zinc alloy have good biocompatibility and degradability; mechanical properties and a degradation rate of the integral composite material are controlled by controlling a relative thickness of a Zn layer to a Mg layer, so that the composite material adapts to a service environment, and therefore, a condition that single metal is too quick or too slow in degradation is solved. The material design and the preparation method are simple and convenient, and the cost is low, so that industrial production is facilitated.

The invention relates to a Backlash operator and neural network-based adaptive filter and a method for modeling a creepage and hysteresis system and relates to the technical field of nonlinear hysteresis and creepage system modeling. The Backlash operator and neural network-based adaptive filter comprises a creepage module, a plurality of Backlash operator modules with the same width, a neural network module and an error calculation module. The design method for the adaptive filter is simple and practicable, delay items are avoided, the output of the filter is only related to the current input, and the hysteresis linearity can be reflected simultaneously. Meanwhile, the output of a Backlash operator serial structure is connected with the neural network, the weight can be adjusted in real time, massive sample data is not needed to be prepared in advance, and the modeling accuracy can be greatly improved. The method is suitable for modeling a piezoelectric ceramic actuator, a magnetostrictive actuator, an excited motor and other systems with hysteresis and creepage nonlinear characteristics.

The invention discloses a design method for property parameters of anti-collapse drilling fluid for fractured formations. According to sequence, the design method includes the following steps: core samples are prepared; four of the core samples are chosen for a triaxial compression test and an acoustic emission test, and the crustal stress of a formation owning the core samples is determined; two of the core samples are chosen for the triaxial compression test, and the cohesion and internal friction angle of the weak planes of the rocks are tested; eight of the core samples are chosen to be put into the drilling fluid, the triaxial compression test is carried out after the core samples are soaked for different times, and the cohesion and internal friction angle of the weak planes of the rocks are tested; the cohesion and internal friction angle of the weak planes of the rocks are respectively linearly fitted to soaking times; the fluid-solid coupling theory is utilized to create a fractured formation well surrounding rock stress distribution model; the elastic mechanics coordinate transformation theory is utilized to create a fractured formation weak plane destruction model; a relation chart between the property parameters of the drilling fluid is determined. The design method disclosed by the invention can quantitatively optimize the key property parameters of the drilling fluid according the requirement of a site for well wall stability.

The invention relates to a design method for real-time optimal control of nonlinear rigidity of a vehicle air suspension and belongs to the technical field of vehicle air suspensions. The design method is characterized in that according to nonlinear rigidity feature of vehicle air springs and real-time optimal damping ratio of the suspension of a vehicle in a current running state, a relation between the real-time optimal rigidity of the vehicle air suspension and the height is acquired by analytical computation, and the optimal rigidity of the vehicle air suspension is controlled in real time by controlling the height of the air springs. The design method has the advantages that real-time optimal control of the nonlinear rigidity of the vehicle air suspension can be designed reliably and simply, design and test costs can be reduced, vehicle riding performance and riding comfort are improved.

The invention discloses a separated left turn lane design and related intersection channelization, signal phase and timing setting method. The method comprises the following steps: step 1, a separated left turn lane selection is adopted in the intersection; step 2, the separated left turn lane is designed; step 3, channelization and signal timing design are carried out on an upstream intersection; and step 4, channelization and signal phase design are carried out on a target intersection. The separated left turn lane design method can improve the passing efficiency at the intersection; compared with the traditional lane design method, the upstream intersection can be used for eliminating conflict between left turn traffic at the target intersection and reverse straight traffic, no new signal lamps need to be added, and the method can be flexibly applied to one or more lanes.

The invention provides a solid rocket engine overall parameter design method. The method comprises the steps of obtaining a task target, and generating an initial sample point in a design space by adopting an optimized Latin hypercube experiment design method; inputting the initial sample point into an engine performance simulation model to obtain a constraint condition and an objective function corresponding to the initial sample point; constructing an agent model of the target function and the constraint condition according to the initial sample point, the constraint condition correspondingto the initial sample point and an initial training sample formed by the target function; carrying out optimization processing on the agent model by adopting a differential evolution algorithm, and outputting an optimal sampling point; and taking the optimal sampling point as a new sampling point to be input into the engine performance simulation model, and outputting the optimal engine structuredesign parameter according to the convergence condition. By the adoption of the method, structural parameter design with the optimal comprehensive performance can be obtained, and the overall design efficiency and the comprehensive performance of the solid rocket engine are remarkably improved.

The invention relates to a personalized interbody fusion cage design method based on topological optimization and bony reconstitution simulation. The method includes the steps of conducting CT/MRI scanning on a vertebral body, segmenting a CT/MRI continuous cross-sectional image of the vertebral body, establishing a three-dimensional model, establishing a finite element model through the substeps of grid dividing and smoothing, material assignment, boundary condition setting, mechanical loading and the like, conducting the topological optimization design on an interbody fusion cage through a density-variable method, and evaluating whether the design is reasonable or not by conducting bony reconstitution numerical analogue simulation on the vertebral body and the cage bone filling area according to the adaptation bony reconstitution theory on the basis of the strain energy density.

The invention provides an input-series-output-parallel (ISOP) system having natural voltage sharing characteristic and a control method thereof. The system comprises n sub-modules, wherein each sub-module comprises a Boost converter and an LLC resonant converter, n is a natural number larger than or equal to 2, in each sub-module, the Boost converter is a front stage, the LLC resonant converter isa rear stage, an output of the Boost converter is used as an input of the LLC resonant converter, the two converters are connected by an intermediate bus capacitor, input ends of the Boost convertersof the n sub-modules are sequentially connected in series, a positive electrode of an input voltage source is connected with an input positive end of a first Boost converter, a negative electrode ofthe input voltage source is connected with an input negative end of an n(th) Boost converter, and output ends of the LLC resonant converters of the n sub-modules are connected in parallel and are respectively connected with a positive end and a negative end of an output resistor. By the system, no extra measure is needed to be added, input voltage sharing and output current sharing of the ISOP system can be achieved, and the influence of inconsistent parameter among the modules on a voltage sharing and current sharing effect is relatively small. The implement method is simple, and the reliability of the system can be greatly improved.

The invention discloses a sea surface object image background inhibition method based on a convolution nerve network, comprising steps of choosing imaging data of a sea surface object under a complex scene, performing pre-processing on the imaging data and then dividing the imaging data into a training set L1 and a verification set L2 according to a certain proportion; using a training set L1 to train the convolution nerve network, using a verification set L2 to perform optimization regulation on a network model to obtain a background prediction model B-Mod; performing pre-processing on the sea surface target image to be inhibited and then inputting the background prediction model B-Mod, and calculating a background inhibition component of each pixel; adding and averaging all the background inhibition components of each pixel to obtain a background inhibition amount;and using the background inhibition amount to perform appropriate function mapping to obtain the image after background inhibition. The sea surface object image background inhibition method uses the depth study method to obtain the background inhibition amount of each pixel in the image by using the depth study according to the difference between the object and the background in the sea surface object image, and verifies through experiments that the sea surface object image background inhibition method has dramatic inhibition effect on the background of the sea surface target image.

The invention provides an active disturbance rejection control method for cluster spacecraft electromagnetic traction, complexity of a cluster spacecraft system and model uncertainty are fully considered, an electromagnetic force/torque model and a relative motion dynamics equation are established, so that the active disturbance rejection control method formed by a most speed tracking differentiator, a non-linear extension observer and a non-linear feedback control law has good working performance, a coupled problem of a dynamic model is effectively solved, high precise electromagnetic traction control can be realized, and the effectiveness and the Lyapunov asymptotic stability of the method are verified; compared with the control performance of a finite time control method, the control method has better rapidity, vibration resistance ability and disturbance rejection, and the control method is simple in design and has engineering realizability.

The invention discloses an SIP soft terminal supporting a WEB service and multiple browsers and a working method thereof. The soft terminal is a multimedia terminal of which various interfaces for supporting the WEB service and multiple browsers are configured on the conventional desktop and which uses a webpage browser as an operation carrier. The soft terminal is provided with a JavaScript interface and a soft terminal assembly module, wherein the JavaScript interface is provided with a soft terminal builder and a soft terminal expansion interface; and a soft terminal functional module is packaged as a soft terminal assembly module by using a browser adapter interface. Compared with the conventional soft terminal, the SIP soft terminal has the advantages that: the building of the soft terminal assembly module is triggered by a JavaScript script and finally the soft terminal is embedded in the browser, the trouble of manual installation by the user is saved and a technique for the embedment in the browser is mature and is easy to realize; an operation platform set for developing WEB expansion services, which is a JavaScript-based bidirectional calling interface is provided for a programmer, the working details of a bottom layer soft terminal module is shielded, and the development of rich WEB services satisfying the individual needs of customers by the programmer is made extremely convenient.

The present invention discloses a method for designing a shield tunnel prestressed liner. Firstly, the steps of setting duct piece structure and size, selecting material, calculating load and calculating the structure internal force primarily are taken. According to the requirement of a liner structure, the prestressed liner type and prestressing strength are confirmed. A stressed reinforcement and a non-prestressed reinforcement are confirmed. Joints are calculated, and continuous uneven rigidity calculation model is confirmed. Prestressing force equivalent load is calculated and is applied to the calculation model together with the load calculated primarily to get the inner force and the distortion of the structure. The equivalent rigidity of a joint area is calculated and compared with the prior result, if the difference is not large, the subsequent calculation is processed; otherwise iterative computation is required to be processed. The calculation of the carrying capacity of the structure is checked, if the requirement is not met, the prestressing strength and reinforcement assembly are required to be adjusted, and the prestressing strength is selected again and calculated. If the carrying capacity meets the requirement, the calculation of crack resistance and crack width and the calculation of deformation are checked, and the relative component design is carried out finally.

The invention provides a hydraulic concrete member fracturing simulation experiment design method capable of applying biaxial acting force. The method comprises the steps of manufacturing a member for applying water pressure, fixing the member together with a square concrete die, pouring concrete into the die, performing vibration and maintenance, then detaching the die while remaining the member for applying water pressure in the concrete, forming a slit in a concrete test piece, and supplying a channel for applying water pressure to the slit. A biaxial experiment machine applies the set biaxial acting force to the concrete test piece; the member for applying water pressure is used for applying the water pressure to the concrete test piece until the test piece is fractured, and the water pressure applied when the test piece is fractured is recorded. The invention also provides a device used in the method. The method and the device used in the method are simple; the prepared concrete test piece can meet an experiment requirement and can be used for researching hydraulic fracturing of the concrete member in a biaxial stress state.

The invention relates to an optical system and a design method for a large caliber grating imaging spectrometer. The invention solves the problem of excessively low energy utilization rate of the grating imaging spectrometer by adopting a large caliber telescopic objective. Due to the catadioptric configuration of an improved gassegrain system, the invention solves the problems of excessively large barrel length and excessively large volume of a large caliber transmission-type telescopic objective and ratio imbalance of a complete instrument formed after the large caliber transmission-type telescopic objective is combined with a spectral imaging system. The large caliber telescopic objective is combined with the spectral imaging system with a convex surface grating to form the optical system for the large caliber grating imaging spectrometer. The optical system has a good aberration correction effect in the broad band range and obtains high imaging quality. When the telescopic objective is matched with the spectral imaging system in a relative aperture mode, the value aperture of the spectral imaging system is greater than that of the telescopic objective, so that the optical system is effectively prevented from generating vignetting. According to the invention, an aspherical mirror is not adopted in the whole optical system, so that the processing difficulty and the cost of the whole optical system are reduced. The invention is suitable for the technical field of an imaging spectrum.