738 results about "Wave height" patented technology

A teleconference device includes a loudspeaker array and microphone arrays arranged at the both sides of the loudspeaker array. A plurality of focal points are set in front of the respective microphone arrays and symmetrically with respect to the center line of the loudspeaker array. A flux of sound collection beams toward the focal points is outputted. By calculating a difference between the sound collection beams toward the focal points symmetric with respect to the center line, a sound component coming into the microphone from the loudspeaker array SPA is cancelled. Furthermore, a total of squares of wave height value of the difference value for a particular time is used to estimate which of the set focal points is the nearest. Furthermore, by comparing the totals of squares of the wave height values of the sound collection beams toward the focal points symmetric to each other, it is possible to judge the position of the speaker.

The invention discloses a spiral waveform cutting metal wire as well as a manufacturing method and equipment thereof. The metal wire is a spiral waveform metal wire formed by rotating a periodic waveform metal wire along an axial center line, a wave crest and a wave trough of the metal wire are distributed along the axial center line, and a spiral diameter of the metal wire is equal to a wave height. The spiral waveform cutting metal wire disclosed by the invention can provide better mortar abrasive carrying capability in the process of cutting a rigid material through a stereostructure of the spiral waveform cutting metal wire, and the abrasive is not easily stripped from a cutting wire, therefore, the production speed and efficiency of technical processing of cutting and slicing silicon materials, precious stones and the like are greatly improved, and the surface quality of the sliced materials can be also improved.

An altitude measuring system and method for aircraft is provided. The altitude measuring system includes altitude sensors for providing data to an altitude processing unit. The altitude processing unit spatially averages each output to determine a mean altitude. Pitch and roll are accounted for by correction. A method of determining aircraft altitude from a plurality of altitude sensors includes receiving altitude sensor data from each sensor and spatially averaging the altitude sensor outputs to determine aircraft altitude. A method of estimating the maximum height of an ocean surface includes receiving a plurality of altitude sensor data and determining a mathematical description of the ocean surface from the sensor data. The maximum probable wave height of the ocean surface is estimated from the mathematical description. From the maximum wave height, a cruise altitude may be determined.

In a method of estimating a magnetic pole position in a synchronous motor, an alternating current voltage having α- and β-axes components in an αβ coordinates system representing a two-phase alternating current coordinates system is applied to the motor, and α- and β-axes components of an alternating current are detected from the motor. A wave height of the alternating current changing with time is approximated to a wave height not depending on time, so that a differentiated value of the wave height with respect to time is substantially set at zero. An induced voltage of the motor is calculated from the components of the alternating current voltage and the components of the alternating current. The magnetic pole position is estimated from the induced voltage.

The invention provides a variable torque wave energy hydraulic power generation device, which consists of a plurality of pieces of equipment such as a pile body, a wave energy power generator room, a plurality of groups of crank rocker devices, a plurality of groups of floater moment arms, a plurality of groups of oscillating floaters, a generator room pushrod, a wireless communication device and a wave instrument. The wave instrument can be used for measuring the real-time wave height and tide level data of waves, and driving the floater moment arms and the generator room pushrod to be elongated or shortened according to preset rules, thereby changing the lengths of the floater moment arms and the floating position of the wave energy power generator room and actively adjusting the magnitude of wave energy input torque. The device can be used for obtaining more stable wave energy, and a wave energy collection device and an offshore wind energy collection device are fused into a whole to collect both the wave energy of the oscillating floaters and offshore wind energy for power generation, so that the utilization efficiency of energy resources is favorably improved, and the power generation cost is lowered.

The invention discloses a device for simulating liquid sloshing generated under the random wave action. The device comprises a computer, a data collection module, an irregular wave generation module, a connecting rod, a base, a movement mechanism fixed to the base, a table board, a liquid cabin fixed to the table board, and a particle imaging velocimetry system. The particle imaging velocimetry system is right opposite to the front face of the liquid cabin, the irregular wave generation module is connected with the table board through the connecting rod, and the table board stably and transversely moves on the movement mechanism. The device further comprises a digital pressure sensor, a strain sensor, a wave height meter, a displacement sensor and an acceleration sensor. The digital pressure sensor and the strain sensor are embedded to the inner wall of the liquid cabin, the wave height meter is installed inside the liquid cabin, one end of the displacement sensor and the acceleration senor are installed on the table board, and the other end of the displacement sensor is fixed to the base. The device can accurately stimulate liquid sloshing generated under the random wave action in a small room.

The invention relates to a performance test device for a water immersion focusing probe and a test method thereof. A steel ball is placed on a reference reflection seat of the performance test device placed in a water tank, the corresponding upside of the steel ball is provided and aligned with a probe to be tested, the probe to be tested generates ultrasonic signals to the steel ball through an ultrasonic gauge, and the performance difference of the probe is tested through the variation of reflection signals. A three-dimensional guide adjusting device is adjusted to test the position and variable quantity of the probe in real time so that reflection echo signals of the probe on the steel ball reaches maximum. Effective reflected wave is received by the probe and displayed on a display screen of the ultrasonic gauge in a form of wave height; scale numerical values on X axis, Y axis and Z axis of a graduated scale are recorded respectively; and various performance indexes of the probe are determined by observing the variation of the wave height. The performance test device for the water immersion focusing probe and the test method thereof are simple and practical, and can test the indexes such as focus, sound width, focus diameter, sound offset angle, sensitivity surplus, sensitivity deflection of a multi-chip probe and the like without depending on special laboratory equipment.

An electric power generating buoy capable of generating power by scavenging energy from ocean wave motion. The power generating buoy includes float element adapted to float up and down following wave motion and an electric generator system with a spring loaded spool mechanism adapted to drive the rotor of the electric generator. It also includes an anchor element and a tension element attached to an anchor and the spring loaded spool mechanism and adapted to spin the spring loaded spool mechanism to generate electric current when wave action causes the float element to rise relative to the anchor element. Preferred embodiments of the buoy will deliver a minimum of 100 Watts of average power from the wave motion characteristic of moderate sea state (sea state 3), with less power from slight sea state (sea state 2) and more power from higher sea states. The basic power generation scheme will rely on harnessing the mechanical energy of the wave as it repeatedly pushes the buoyant surface float against a ballast force through the distance corresponding to the wave height.

The invention provides measuring device and method of dynamic ocean waves. The device comprises two pressure sensors, a temperature sensor, an acceleration sensor, an inclination angle sensor, a signal conditioning unit, an AD conversion unit, a data storage unit, an RS485 communication unit, a power management unit and a digital signal processor. The invention has the core that the two pressure sensors are utilized for detecting the pressure in water, the depth at the zero crossing moment is derived according to the pressure-in-water computing formula described by a Bernoulli equation in fluid mechanics, the depths at other times except the zero-crossing moment are continuously estimated according to the data of the acceleration sensor and an angle sensor, the wave number and the wave height are computed according to the computing relational expression of the wave number and the wave height at the non-zero-crossing moment. The technical method not only has novelty and creativity, but also has simple structure and convenient manufacture and can be widely used for underwater robots, communication buoys and other diving sounding systems.

Disclosed is a method and apparatus for dampening waves preferably comprising a wave pool having two portions, a first wave forming portion with an inclined section oriented obliquely relative to the travel direction of the waves that causes the waves to begin breaking, and a second wave dampening portion having a relatively deep solid chamber floor and a raised perforated floor above it for dampening the waves after they begin to break. The properties of the raised floor, including its porosity, its depth (relative to the chamber depth), and the characteristics of the waves to be dampened, including the wave height and shape, are taken into account in designing a dampening system that substantially dissipates the waves, which in turn, reduces wave reflections and rip currents that can interfere with the next oncoming waves, and thereby, help to maintain quality surfing waves at high frequencies without increasing pool size.

Systems and methods for acquiring accurate maps of near-shore depth and surface currents are disclosed. An imaging platform is provided which is able to obtain a time series of overhead images of an area of a body of water having pixel intensity correlated with wave height. The platform may be on a tower, or may be airborne, space-borne, or ship-borne. The imaging modality may be optical, radar, or LIDAR. Image processing corrects the images, as and if needed, such they are mapped onto a grid of fixed coordinates, and the pixel intensities have a near linear relationship to wave height. A two-dimensional Fourier transform of each image is obtained, then the extremum of an objective function is found, wherein the objective function is a function of the depth and surface current (velocity) vector at each pixel location, and the extremum is sharply peaked at a particular set of depth and a particular set of surface current vector values. A pixel-by-pixel map of depths and or currents can be produced.

Disclosed is a system and method for static and dynamic positioning or motion control of a marine structure by using real-time monitoring of at least one of a mooring line, marine environments, 6-dof movement of a marine structure, a tank state, a ship topside, the seabed, or their combinations. The static and dynamic real-time monitoring data of the mooring line is obtained and processed for positioning the marine structure or controlling and managing a motion thereof. Here, 1) a tension of a mooring line is measured by means of real-time monitoring of the mooring line, 2) various marine environment elements such as wind direction, wind speed, air humidity, atmospheric pressure, atmosphere temperature, cloud height, visibility, ocean wave, wave height, sea current speed, sea current direction, rain or the like are measured by means of real-time monitoring of the marine environments, 3) 6-dof movement of the marine structure is measured by means of real-time monitoring of the marine structure, 4) ullage and sloshing data of various tanks in the marine structure are measured by means of real-time monitoring of tank states, 5) damage and life of pipes, facilities or the like located at a ship topside of the marine structure are measured by means of real-time monitoring of the ship topside, 6) damage and life of umbilical cables, pipes, pumps and valves located on the seabed are measured by means of real-time monitoring of the seabed, and suitable static and dynamic positioning or motion control and management may be automatically performed based thereon.

The invention relates to the technical field of hydrodynamic experiment and search, and more specifically, relates to a nonlinear and multidirectional irregular wave and internal wave generating system and a control method therefor, wherein the system is used for generating high-precision nonlinear multidirectional irregular waves and internal waves in a pool. The system based on vertical multilayer and horizontal multi-plate control comprises a test pool (comprising a wave absorbing segment), a computer control drive system, a mechanical transmission system, a wave generating plate system (vertical multiple plates and horizontal multiple groups), and a wave height monitoring system. There are two fluid layers with different densities in the test pool during wave generating, or there is one fluid layer in the test pool otherwise. The system achieves the simulation of the nonlinear and multidirectional irregular waves and internal waves in the pool through the simultaneous control of a plurality of groups of horizontally arranged vertical multi-plate wave generating mechanisms and the different nonlinear vertical speed distribution of the two fluid layers or the single fluid layer, is higher in accuracy and precision, and meets the requirements of different tests.

The invention discloses a floating cofferdam type wave energy generating set, which comprises a tower convergent wave pool consisting of a platform and a multistage conic pool. The bottom of the tower convergent wave pool is divided into a plurality of ballast tanks and provided with a water level sensor, the upper cavities of the ballast tanks are filled with a buoyancy material, the platform is arranged on the buoyancy material of a groove in the middle of the convergent wave pool, and the platform is provided with a controller, a compressed air system and a baffle wall; the baffle wall is provided with a sensor, the low level of each stage of the convergent wave pool is provided with a pipeline leading to the sea level, the pipeline is internally provided with a Kaplan turbine and an asynchronous generator, the floating cofferdam type wave energy generating set is connected with anchor pipers with swivel links through anchor chains, and the anchor pipers are anchored at the bottom of the sea. According to the draught height of a wave height adjusting device, the floating cofferdam type wave energy generating set is not influenced by tide level and limited by terrain, always works towards the waves all around, can catch the wave energy as much as possible under various conditions, and has the advantage of high working efficiency; only the Kaplan turbine is the unique movable component so that the reliability of the whole set is improved.

The invention relates to a method for dynamic sea surface laser pulse wave beam echo simulation. The method for dynamic sea surface laser pulse wave beam echo simulation comprises the following steps that according to a sea spectrum statistic model, a dynamic sea surface is generated by means of the reverse-FFT technology, and the parameters such as the wind speed, the wave height and the sea wave period are considered through the model; space energy distribution and the pulse shape of each emitted laser wave beam are measured, space-time distribution of any laser wave beam is obtained through fitting, and section spatial light intensity distribution at any distance is determined based on energy conservation; a laser radar wave beam back scattering echo radar equation is established based on the radiometry, rough surface processing is conducted on a water surface element, and the water surface element is expressed through a bidirectional reflection distribution function; drawing, coloring, rendering, real-time animation, hidden-line elimination and clipping of the scene are completed based on a computer graphic base OpenGL. The method for dynamic sea surface laser pulse wave beam echo simulation can be applied to different sea condition model machine dynamic intersection virtual experiments, facilitate development of sea surface pulse echo scattering mechanism study, and save a large amount of cost.

The invention relates to a navigation X-waveband radar ocean wave parameter inversion algorithm based on EOF decomposition. The method comprises the following steps: first of all, carrying out EOF decomposition on a navigation X-waveband radar image sequence to obtain different modalities; then by use of a Burg algorithm, obtaining a maximum entropy power spectrum of the main component of a first modality, and according to a spectrum peak value, obtaining a period and a wavelength of ocean waves; by use of a linear relation between a standard deviation of the main component of a modality and an effective wave height, obtaining an effective wave height of the ocean waves; by use of a space function of the first modality and the main component of the first modality, reconstructing a radar image sequence of the first modality of an ocean wave field, performing two-dimensional Fourier transformation on any one image in the sequence, and according to an obtained wave-number spectrum peak value, determining a simulation wave direction; and by use of wave stripe similarities in two adjacent radar images, determining an ocean wave direction. According to the invention, by use of an EOF, the ocean wave field is decomposed into the different modalities, and the wave height, the period, the wavelength and the wave direction of the ocean waves are extracted from major modalities, such that the problem of influences caused by inhomogeneity of the wave field and large noise in case of a low ocean condition is solved.

The invention discloses a method for extracting wave height from sea echo first-order Bragg harmonic peak of a high-frequency ground wave radar. The method comprises the steps of building a response curve of the Bragg wave spectrum value based on the wave height; calibrating the first-order peak power of a long-distance unit through the wave length subjected to second-order spectrum inversion and the first-order peak powder in a near distance unit of the radar, so as to calculate the wave height distribution in the long-distance unit. The method is mainly dependent on the unsaturation feature of the Bragg wave; the wave height is extracted from the first-order Bragg resonance peak; the first-order peak under the general ocean state is obviously more than that in the second-order spectrum, so that the wave height detection distance of the high-frequency ground wave radar can be greatly improved; meanwhile, the portable radar adopting a compact receiving antenna has the space resolution for obtaining the wave height; therefore, the development, popularization and application are greatly promoted.

The invention relates to a sea wave significant wave height long-term trend prediction method based on reanalysis data. The sea wave significant wave height long-term trend prediction method is characterized by comprising the steps that (1) weather forecast data of an ERA-Interim reanalysis data set at each time frequency are collected, (2) coordinates of all lattice points are obtained, (3) SLP anomaly and standard deviation are calculated, (4) principal component analysis of the SLP anomaly is conducted, (5) Box-Cox transformation is conducted on sea area data, (6) a predictive factor of sea wave significant wave height is calculated, (7) the standard deviation of the significant wave height and the predictive factor is calculated, (8) the predictive factor is applied into a prediction model, (9) a significant wave height lagged value is applied into the model, (10) SLP field prediction on the basis of EOF is carried out, (11) predictive factor optimization selection is conducted, (12) the sea wave significant wave height is predicted through the model, (13) the prediction level is evaluated, (14) the sea wave significant wave height long-term trend is calculated, and (15) a significant wave height long-term trend chart is drawn. According to the sea wave significant wave height long-term trend prediction method based on the reanalysis data, the significant wave height long-term trend of multiple time frequencies can be predicted, and accuracy is high.

The invention relates to a storm surge dam overtopping risk early-warning method based on the wind field effect of typhoon processes. The method includes the following steps of 1, establishing a refined storm surge-astronomical tide-coastal wave coupling dam overtopping value forecasting model, and outputting the water level and the wave height of a coastal area; 2, according to the data of a seawall and historical typical typhoons, analyzing to obtain the influence coefficients of different types of seawalls on storm surge dam overtopping; 3, according to the water level and the wave height,which are obtained in step 1, of the coastal area and the influence coefficients, obtained in step 2, of different types of the seawalls on storm surge dam overtopping, obtaining the dam overtopping risk rank of each seawall. Compared with the prior art, the method has the advantages that different types of the seawalls, microtopography and other influence factors on a sea level in the single-typhoon process and under other weather process influences and the multi-typhoon process are considered, and an ADCIRC+SWAN coupling model is adopted, so that dam overtopping value forecasts with high accuracy are achieved.

The invention provides a fusion inversion method and device for a sea wave significant wave height field. The method comprises steps as follows: acquiring a significant wave height field which is acquired by a spaceborne radar height gauge and comprises substellar point sea wave significant wave height data as well as a sea surface wind field which is acquired by a spaceborne microwave scatterometer and comprises wide swath sea surface wind speed data; performing conversion calculation processing on the acquired sea surface wind field according to the wind wave growth relation between sea surface wind speeds and sea wave significant wave heights, and obtaining a wind wave field having the same swath as the sea surface wind field; performing correction processing on the wind wave field according to the acquired significant wave height field, and obtaining the sea wave significant wave height field having the same swath as the sea surface wind field; providing the sea surface wind field with wide swath, high precision and high spatial resolution through the spaceborne microwave scatterometer, converting the sea surface wind field acquired by the scatterometer into the wind wave field according to the wind wave growth relation, performing correction processing on the wind wave field through the significant wave height field of the height gauge, and finally, obtaining the significant wave height field with wide swath, high precision and high spatial resolution.

The invention relates to prefabricated and combined porous floating breakwater suitable for long waves. The breakwater can be arranged in harbors, coasts, rivers and the like. Multiple energy dissipation mechanisms such as reflection resistance, energy peak dissipation, turbulence energy consumption, porous seepage energy consumption and the like are adopted. The floating breakwater consists of three parts, namely, floating components, mooring systems and connecting devices between adjacent floating components. The problems that existing breakwaters are complex in construction method, long in construction period and high in engineering cost are solved. Another technical scheme of the breakwater is as follows: in order to realize a better wave dissipation effect, water surfaces of the floating components are set as vertical still water surfaces, a plurality of wave-dissipation through holes are formed in wave surfaces and back surfaces, and grooves are formed in upper surfaces of the floating components, so that the wave energy can be consumed effectively, and the wave height behind the breakwater can be reduced. The breakwater adopts a thin-wall reinforced concrete structure and is high in self-strength; fixing seams are connected into a whole, and the firmness is good; the construction operation is convenient, short in period and high in efficiency; vertical construction can be performed in water surfaces of embankments of canals, ponds, rivers, lakes, seas and the like as well as waters, the foundation earth volume is small, the paving area is small, and the engineering cost is low.

The invention relates to a method for integrally and safely conveying a wind turbine on the sea which includes the following steps: 1) the wind turbine comprising a tower drum and an internal electric device is assembled into an integral body; 2) the wind turbine is hoisted on a deck by a hoisting ship and the bottom part of the wind turbine is welded and fixed on the deck; 3) a measuring ship is adopted to monitor the wave height, the wind speed and the wind direction; 4) a gyroscope moving instrument is fixed and a rolling angle, a pitching angle, the acceleration of the rolling angle and the acceleration of the pitching angle are measured; 5) an acceleration sensor is arranged and the transverse acceleration and the longitudinal acceleration of the upper part of the tower drum are measured; 6) strain foils are arranged at the circumference direction at the centralized location of the strain and the load data at the locations of each strain foil is obtained by a conventional electrometric method; 7) the data information obtained from step 3) to step 6) are integrated and control is carried out on the sail or sail suspending, course and sail speed of a transport barge; 8) the wind turbine is wholly cut from the deck and wholly hoisted on a foundation pre-manufactured on a marine mounting part. The method has very important practical meanings on the development and construction for a large scale marine wind farm.

A method for measuring sea waves includes: transmitting ultrasonic waves from an ultrasonic transmitter 2 provided on a buoy 1 into the sea, and receiving the ultrasonic waves from three transponders 3 on the seabed together with the time signals; detecting distances between the transponders 3 and the ultrasonic transmitter 2 based on the propagation time of the ultrasonic waves; high-pass filtering the distance data to extract a short-term fluctuation component; preparing and solving linear equations to determine the displacement in the height direction of the short-term fluctuation component and obtain a wave height.

The present invention provides a GPS device for measuring the wave height and current direction and speed, which is capable of accurately measuring the wave height (height of the waves) and current direction and speed (tidal current) in any point on the sea, ocean, lake, or marsh, and to a system using such a device. The GPS receiver 2 of the GPS device 1 for measuring the wave height and current direction and speed processes the GPS signals received with the GPS antenna 3 and measures the three-dimensional position of antenna 3. The three-dimensional position data are recorded by the data recording unit 4 connected to the GPS receiver 2. When the floating body 5 having those devices 2-4 installed thereon floats on the sea or ocean, it moves together with the waves and tidal current in the present location. The software 7 for conducting high-pass filter processing and smoothing processing is installed in the data processing unit 6, and the data on the wave height and current direction and speed are output, while the errors are being removed from the three-dimensional position data recorded in the data recording unit 4.

The invention discloses a tide level self-adaption device of a vibration floater wave power generation device. The vibration floater wave power generation device comprises a submerging and surfacing body, guide rods, a floater, a hydraulic cylinder and sleeves, wherein the guide rods are arranged on the submerging and surfacing body; the floater and the sleeves are both sleeved on the guide rods; the cylinder block of the hydraulic cylinder is fixedly connected with the sleeves through support arms; a piston rod of the hydraulic cylinder is fixedly connected with the floater; the tide level self-adaption device comprises a wave height adjustment frame and a damping mechanism. According to the tide level self-adaption device, adaptive adjustment can be performed on the position of the hydraulic cylinder along with the tide level change, so that the effective working distance between the floater and the hydraulic cylinder is ensured, the power generation device is ensured to have higher energy conversion efficiency, and meanwhile, the dangerous situation that the piston rod rushes to the top or is separated from the cylinder block of the hydraulic cylinder is avoided; moreover, the tide level self-adaption device is formed completely by matching mechanical structures, and electronic components or electronic control systems are not related, so that the tide level self-adaption device is simpler and more stable in structure, and cannot be influenced by the marine environment, can stably work under the maritime severe environment for a long time, and does not need to be maintained frequently, so that the use and maintenance cost is extremely low.

Embodiments of the present invention provide a novel method and discretization for animating water waves. The approaches disclosed combine the flexibility of a numerical approach to wave simulation with the stability and visual detail provided by a spectrum-based approach to provide Eulerian methods for simulating large-scale oceans with highly detailed wave features. A graphics processing unit stores a one-dimensional texture referred to as a wave profile buffer that stores pre-computed results at a number of discrete sample points for performing wave height evaluation. The water surface is rendered according to water height values computed using the wave profile, accounting for advection, spatial diffusion, angular diffusion, boundary reflections, and dissipation.

The invention relates to a liquid tank optimum design method based on a load in severe sloshing inside a liquid cargo ship. The liquid tank optimum design method includes the following steps: firstly, identifying the hydrodynamic performance of the liquid cargo ship by calculating the response amplitude operator and the motion acceleration of every liquid tank in the liquid cargo ship; secondly, analyzing the long-term motion response of the liquid cargo ship by combining the period distribution of wave heights with the distribution probability of wave directions in actual operating waters of the liquid cargo ship; thirdly, calculating the natural periods of traverse sections and vertical sections of the liquid tanks with various liquid carrying rates; fourthly, calculating the load in server sloshing of the liquid tanks by integrating all elements and drawing a sloshing wave condition critical curve graph to select sloshing wave critical conditions resulting in the severe sloshing inside the liquid tanks; fifthly, calculating the load pressure distribution on the walls of cabins by integrating basic parameters of the cabins, comparing maximum loads in severe sloshing of various liquid tanks with different shapes of sections and sizes with each other to obtain relatively optimum sections and sizes of liquid tanks adapting to operating in the actual operating waters. The liquid tank optimum design method has the advantages of being good in calculation speed, high in calculation accuracy, and simple and practical in use, and provides liquid tank optimum selection with important theoretical basis.

The invention provides a method for modeling a sea wave significant wave height inversion model based on particle swarm optimization (PSO) self-adaptive piecewise linear fitting, and belongs to the technical field of sea wave parameter inversion. The method comprises the steps of performing outlier removal processing on data, performing sparsification processing on the data, initializing parameters in a particle swarm, initializing a particle speed, updating the particle speed, updating particle displacement and the like. According to the method for modeling the sea wave significant wave height inversion model based on self-adaptive piecewise linear fitting, the wave height is subjected to inversion by utilizing a particle swarm optimization, so that the function of a conventional algorithm can be realized, the precision of the conventional algorithm is achieved, and more precise wave height inversion can be performed; and moreover, when the number of the pieces in the method is more than or equal to two, the modeling precision is higher than that of a conventional modeling method. The inversion model modeled by the method has higher inversion precision compared with the inversion model modeled by the conventional method, and moreover, the method for modeling a sea wave significant wave height inversion model based on PSO self-adaptive piecewise linear fitting is wide in applicability and high in flexibility.

The invention discloses a plate exchanger compound ripple lamella bundle. A plurality of ripple plates are folded to form a lamella bundle of the plate exchanger; the ripple plate is struck out of a plurality of rectangle compound ripples arranged by matrix on a flat plate, and each matrix unit comprises two layers of ripples of different height and different shapes. Ripples arranged in the outer circle have relatively high wave height and a relatively big pitch of waves with the top being a bearing part between plates, and the ripples of the outer circle are arranged in pairs and in parallel with the vertical axes of two pairs of ripples forming a rectangle. Ripples heave transversely arranged in the rectangle, vertical ripples subside, and one or a plurality of raised inner layer ripples of relatively small wave height is / are arranged between the ripples of the outer circle. The invention has the advantages that the invention has high efficiency and intensifies the heat transmitting; the invention has a relatively wide flow passage and can allow relatively ropy liquid to get through; the invention enlarges the circulating surface, reduces the flowage resistance, and is helpful for energy saving and expense reducing in the industry process; the invention is easy to be processed, decreases the production cost and is helpful for the product popularization and application.