67 results about "Hot band" patented technology

The present invention proposes a one-axis solar tracker system and apparatus which is simple to install, lower cost and with the provision of an electric-magnetic locking device to resist from medium to strongest wind condition like hurricane or typhoon. Solar farms is more and more popular to use one-axis tracker due to lower cost, higher wind resistance and easier for large scale solar farm installation, especially at lower latitude tropic zones. This disclosure proposes a one-axis tracker with multiple posts support using a single or dual linear actuators driving mechanism for rotation. It is also equipped with a wind lock device to lock the solar tracker in horizontal neutral position during strong wind condition such as hurricane or typhoon. The stepwise wind lock device can further be applied to locking the solar tracker following each step of linear actuator activation enabling the disclosed solar tracker to operate in windy conditions.

Two-phase, boiling heat transfer in confined channels close to a source of heat, such as an electrical component or device, carries the latent heat of vapors away to remote locations where “real estate” demands of air convection are tolerable operationally, economically, and technologically. Liquid-to-vapor, phase-change, heat transfer in a narrow channel (e.g., typically less than 0.200 inches total thickness, and often less than 0.150 in the channel itself) improves by several hundred percent the heat extraction from modest temperature (e.g., about 120 degree F.) devices, when compared to heat fluxes in pool boiling. Saturated working fluids provide nearly isothermal conditions in the working fluid. Minimal conduction paths provide minimal temperature gradients, and capillary action may maintain nearly constant temperature conditions about a surface of a heat source, while carrying heat of vaporization away to a condensation location.

The combination of an infrared phosphor fluorescing at wavelengths between 8 μm and 13 μm with a wavelength-selective cold mirror glazing transparent to the fluoresced radiation can create a device capable of providing passive radiative cooling in tropical heat and humidity in locations with an unobstructed view of sky. The concentration of thermal radiative energy into the narrow band radiated by the phosphor, and the reflection of infrared radiation outside that band, provides more net cooling through saturation humidity at 37° C. than does a black-body or conventional selective radiator.

The present invention provides a multi-zone marine environment comprehensive simulation test apparatus. According to the multi-zone marine environment comprehensive simulation test apparatus, a sample frame is arranged in the main body of an environment test bin, is connected to a power system, and is driven to rotate and lift by the power system; and in the power system, the positions of a horizontal contactor and a lifting motor matched to the horizontal contactor are fixed, a vertical contactor, an inner transmission shaft gear box, an outer transmission shaft gear box, an inner transmission shaft rotation motor and an outer transmission shaft rotation motor act along with the lifting of an inner transmission shaft and an outer transmission shaft, the an inner transmission shaft gear box, the outer transmission shaft gear box, the inner transmission shaft rotation motor and the outer transmission shaft rotation motor are matched to the vertical contactor, the outer transmission shaft is connected to the sample frame, and the inner transmission shaft is connected to a coaxial reverse rotation screw propeller. According to the present invention, the rotation and the lifting of the inner transmission shaft and the outer transmission shaft are controlled by the motor matched to the inner transmission shaft and the outer transmission shaft, such that the synchronous lifting and the separated rotation are achieved, and the sample frame and the coaxial reverse rotation screw propeller are respectively driven; and by combining the atmospheric environment simulation system and the solution environment simulation system, the automatic control and simulation test of the multi-zone marine environment can be achieved while a variety of test functions are integrated, such that the rapid test and the effective evaluation of the corrosion and the aging performance of the material in the tropical marine environment can be met.

Negative-stiffness-producing mechanisms can be incorporated with structural devices that are used on spacecraft that provide thermal coupling between a vibrating source and a vibration-sensitive object. Negative-stiffness-producing mechanisms can be associated with a flexible conductive link (FCL) or “thermal strap” or “cold strap” to reduce the positive stiffness of the FCL. The negative-stiffness-producing mechanisms can be loaded so as to create negative stiffness that will reduce or negate the natural positive stiffness inherent with the FCL. The FCL will still be able to provide maximum thermal conductance while achieving low or near-zero stiffness to maximize structural decoupling.

A method of high-throughput printing and selective transfer of graphene onto a substrate includes the steps of: providing a thermal release tape having graphene adhered thereto; placing a substrate onto the graphene; pressing the thermal tape and the graphene against the substrate at a uniformly-distributed pressure; heating localized portions of the thermal tape and graphene using a localized heat source, thereby diminishing the adhesive properties of the thermal release tape in the localized portions and transferring graphene from said localized portions to the substrate; and separating the thermal release tape from the substrate. The method may include the further step of moving the localized heat source to selected positions on the thermal release tape during the heating step, thereby forming a pattern of heated portions. The method may use a laser beam as the localized heat source, movement of the laser beam being performed by a computer-controlled deflectable mirror.

Non-oriented electrical steel sheet remarkably improved in magnetic properties in the rolling direction by a method superior in cost and productivity, that is, non-oriented electrical steel sheet excellent in magnetic properties in the rolling direction comprising, by wt %, Si in an amount of 2.0% or less, Mn in 3.0% or less, Al in 1.0% to 3.0%, at least one of Sn, Sb, Cu, Ni, Cr, P, REM, Ca, and Mg in a total of 0.002% to 0.5%, and a balance of Fe and unavoidable impurities and having a ratio (B50L / Bs) of the magnetic flux density B50L in the rolling direction after stress relief annealing and a saturated magnetic flux density Bs of 0.85 or more and an core loss W15 / 50L of 2.0 W / kg or less, produced by the method of annealing the hot band at 800° C. to 1100° C. for 30 seconds or more to achieve a crystal grain size after final annealing of 50 μm or less, skin pass rolling the sheet by a reduction of 3% to 10%, then stress relief annealing it. Further, a cold rolling reduction of 60% to 75% is preferable.

The invention provides an instrument for measuring the coefficient of heat conductivity of a solid material. The instrument comprises a heating plate, wherein, the heating plate comprises a first hot band, a second hot band and a third hot band which are distributed side by side; the first hot band includes a first rectangular groove and a second rectangular groove, and the third hot band includes a first rectangular groove and a second rectangular groove; the second hot band includes two first rectangular grooves and two second rectangular grooves; one first rectangular groove and one second rectangular groove in each hot band form one resistor; the resistors are electrically connected with each other in the form of Wheatstone bridge; and the measuring instrument further includes a constant voltage source or a constant power source, and a data acquisition system. The measuring instrument is capable of measuring the coefficient of heat conductivity from a heat insulating material to a metal material in a very short period of time, with the measuring range being 0.01-300Wm<-1>K<-1> and the uncertainty of the heat conductivity coefficient obtained within 5%.

The invention provides a forecasting method and system of a speed of an instantaneous extremely strong wind caused by a tropical cyclone at a coastal region. The method comprises the following steps: historical tropical cyclone data having a windy influence on a to-be-measured area as well as historical data of instantaneous extremely strong wind speed per hour of the to-be-measured area within corresponding time are collected; according to the strength, the historical tropical cyclone data are categorized to obtain data of various tropical cyclones; a forecasting range of the to-be-measured area is divided into a plurality of square longitude-latitude grids with areas of 1degree * 1degree, and for each kind of tropical cyclone, a path point with a maximum instantaneous extremely strong wind speed at the to-be-measured area is selected in the grid for the same tropical cyclone, and distances of all path points and the to-be-measured area and orientations are calculated; a position and space distribution diagram of the instantaneous extremely strong wind speeds caused by the various tropical cyclones at the to-be-measured area is made; and according to strength and path information of a tropical cyclone that is going to be forecasted in future, an instantaneous extremely strong wind that is going to be caused at the to-be-measured area is forecasted and outputted by combining the instantaneous extremely strong wind position and space distribution diagram. In addition, the invention also provides a corresponding forecasting system.

The invention provides a Fresnel lens sheet, in which a rainbow, hot band, moiré, color corn and the like are inconspicuous, bright uniformity is maintained, sharpness of an image is not deteriorated, and a balance is kept, and provides a rear projection type screen having the Fresnel lens sheet. In the Fresnel lens sheet 1 having a Fresnel lens element group 4 each Fresnel lens element composed of a Fresnel lens surface 2 and a non-lens surface 3 on a surface (light outgoing surface 7) thereof, the surface roughness of at least one of the Fresnel lens surface 2 of the Fresnel lens element group, the non-lens surface 3 of the Fresnel lens element groups 4, and the sheet surface 12, on which no Fresnel lens element group 4 is formed, is made rougher from the central portion of the Fresnel lens sheet outwardly. At the time, it is preferable that the difference between the surface roughness of the central portion of the Fresnel lens sheet 1 and the surface roughness of the outer peripheral portion of the Fresnel lens sheet be 0.1 μm or more to 5.0 μm or less.

An automated trigger device and a corresponding method for dynamic triggering of developing and / or imminent tropical storms for integrated monitoring devices and / or control devices and / or early warning systems. The trigger device includes a trigger module, and measurement devices arranged in cellular, geographically and / or topologically definable units or zones. Geophysical measurement parameters can be transmitted from the measurement devices to the trigger module. By a Monte Carlo module—and based on the measurement parameters—data records can be dynamically generated for definable future time intervals. By an extrapolation module track distribution parameters of a track distribution integrable over the plurality of data records are generated for each of the definable future time intervals. By an activating device—and based on the generated track distribution parameters and / or the trigger parameters—a corresponding control signal is transmitted to the monitoring device.

The invention discloses a tropical cyclone dynamic simulation method based on time-varying weather data, and belongs to the computer graphics related technology. The method mainly comprises a tropical cyclone modeling method based on the weather data, a cloud drawing algorithm method of multiple forward scatterings, and a tropical cyclone simulation algorithm method of a fluid based on a position, and the specific steps are as follows: first analyzing the time-varying weather data of the tropical cyclone to extract velocity field data for the fluid simulation use, extracting cloud intensity related data, establishing a particle model of a cloud at the same time, modeling graphic metadata suitable for the computer graphics drawing; and then vividly displaying the graphic metadata; and finally realizing the simulation display of the tropical cyclone in the weather data by use of the fluid simulation algorithm based on the position according to the established graphic model.

The invention relates to a high-altitude low-temperature environment simulation device before attitude control engine ignition test, and solves the problems that the existing high-altitude low-temperature environment of the engine cannot meet the requirements of the engine test for temperature control precision, the temperature distribution is uneven, and the propellant is easy to freeze. The device comprises a propellant heating system, a low temperature refrigeration system, a nitrogen replacement system, a vacuum system and an engine nozzle fixing component, wherein the propellant heating system comprises a heating cable and a heat insulating material, the heating cable is wrapped around the propellant supply line, the heat insulating material is covered on the propellant supply line after the heating cable is wrapped; the low temperature refrigeration system comprises a liquid nitrogen supply unit, a liquid nitrogen discharge unit and a low temperature environment chamber; the lowtemperature environment chamber is internally provided with a plurality of sets of cooling ring tubes, and the liquid nitrogen supply unit and the liquid nitrogen discharge unit are respectively connected to the cooling ring tubes; the nitrogen replacement system comprises a nitrogen inlet pipe and a nitrogen outlet pipe which are both connected to the low temperature environment chamber; and thevacuum system is used to vacuumize the inlet pipe of the engine.

The invention relates to the technical field of plate-shap control in the band steel rolling of a successive mill and discloses a band edge thickening integrative control method which is applicable to a common four rollers hot band steel successive milling machine without milling roller transverse movement, online milling mill roller and band steel edge lubrication. Through optimizing the original roller type curve of the operating machine set of a finishing mill, the transverse distribution of the cooling water of the operating roller and reasonably controlling the milling rhythm, the invention realizes the control of the thickening operation in the region of about 40 to 60mm from edge of the hot milling band steel. The invention solves the problem that the present common four rollers successive mill has no effective control method for the phenomenon of the edge thickening except for additionally adding specialized devices. The invention provides the common rollers and PC mills which have no auxiliary devices such as milling roller transverse movement, online milling mill roller, band steel edge lubrication and so on with a band steel edge thickening integrative control method and need not add devices.

The invention relates to a method for realizing error prediction by combining a tangent method and a tropical cyclone prediction path. The method comprises the steps of providing a current position point and a plurality of prediction nodes with the quantity of an integer number, creating an error range circle for each prediction node, joining tangent lines of the error range circles of two adjacent different prediction nodes by utilizing a circular tangent method and adopting the current position point as a starting point, forming an error range circle, and effectively verifying the accuracy of the future prediction data through the error range circle. The accuracy of the future prediction data is effectively verified through the error range circle, so that the application reference added value of the prediction data can be improved, and a more-intuitive exhibition application effect can be realized. Meanwhile, the controllability of the prediction range of the future prediction data by tropical cyclone prediction personnel can be improved, the prediction of the dotted line is upgraded to the regional prediction, and the prediction amplitude and anticipation degree are more complete.

The invention discloses a method to estimate the intensity of tropical cyclones across the Northwest Pacific Ocean by using a geostationary meteorological satellite image. The method is characterized by comprising the following steps: extracting the information of the infrared window area brightness temperature and the water vapor channel brightness temperature of a typhoon inner core area in a satellite image in which the interval of longitude is equal to the interval of latitude ; acquiring the WIRA index values by using the brightness temperature information; calculating the mean value for total WIRA index values acquired, to acquire the mean value , and to count total corresponding pixel points W when the WIRA index values are in the range of in the typhoon core area; and using the typhoon intensity equation: I=985.474-0.033xW-2.391x10<-5>xW<2> to obtain the typhoon intensity. This method can indicate the symmetric level changes for the convective axis, and can also exclude thin cirrus, stratospheric water vapor anomalies and penetrating convection, and can provide indexes that are best related with the intensity of the optimal path of a typhoon, so that the typhoon intensity is calculated more accurately.

The invention provides a device for measuring the coefficient of heat conductivity of a solid material. The device comprises a heating plate, wherein, the heating plate comprises a first hot band, a second hot band and a third hot band which are distributed side by side; the first hot band includes a rectangular groove, and the third hot band includes a rectangular groove; the second hot band includes two rectangular grooves; all the rectangular grooves are made of nickel and are electrically connected with each other in the form of wheatstone bridge; and the measuring device further includes a power supply for providing two opposite nodes of the heating plate with constant energy, and a data acquisition system which is connected with the heating plate and used for collecting information about changes in voltage and temperature of other two opposite nodes in the heating plate, thereby obtaining the heat conductivity coefficient and the thermal diffusion coefficient of the material to be tested. The measuring instrument is capable of measuring the coefficient of heat conductivity from a heat insulating material to a metal material in a very short period of time, with the range of the obtained heat conductivity coefficient being 0.01-300Wm<-1>K<-1> and the uncertainty of the heat conductivity coefficient obtained within 5%.

The invention utilizes the uniformity of gradient distribution of the infrared brightness and temperature deviation angle to locate the central position of the tropical cyclone. Firstly, a region of interest is intercepted from an infrared satellite image, and Bezier histogram segmentation and K-Means clustering segmentation are respectively conducted to obtain a binary image of a tropical cyclonemain cloud system and a binary image of intense change location of infrared brightness and temperature. Then, the obtained binary images are subjected to Hough transform to detect circle so as to reduce the search range for the tropical cyclone center. Finally, deviation angle gradient distribution uniformity matrix is calculated and obtained with each pixel in a detection area as a reference center, and then the tropical cyclone center lies in the position of the maximum value in the deviation angle gradient distribution homogeneity matrix. Experiments show that the method achieves satisfactory results for the locating of the center of tropical cyclones with or without eye.

The invention relates to a device for testing the absorption response of terahertz waves in different gas environments. An ultrashort-pulse laser output from a laser light source is divided into two beams through a beam splitting sheet, and a transmitted beam passes through a first reflecting mirror, a delay module, a second reflecting mirror, a third reflecting mirror and an ITO film and then serves as terahertz wave probe light to enter a terahertz wave spectrum detection system. The other part of light beam reflected by the beam splitting sheet enters a terahertz wave transmitting system. Radiated collimating terahertz waves enter a vacuum pipeline filled with gas through a terahertz wave inlet window flake. After the terahertz waves interact with gas molecules and is emergent from a terahertz wave outlet window flake, the terahertz waves enter the terahertz wave transmitting system after passing through a fourth reflecting mirror and the ITO film. A heating belt and a refrigeration device are arranged on the outer wall of the vacuum pipeline, and the real-time temperature inside the vacuum pipeline is controlled. The total length of the vacuum pipeline can be adjusted by inserting a plurality of sections of vacuum pipelines. By the adoption of the device, the absorption response characteristic of the terahertz waves in the gas environments of different temperatures and pressure intensities can be tested.

The invention discloses a spraying cavity and steam cavity integrated phase change cooling device and system. The device comprises cavities, a spraying cavity liquid inlet pipe, a spraying cavity liquid outlet pipe, a spraying hole plate and array nozzles, wherein the spraying hole plate and the array nozzles are located in the cavity. The cavities comprise a spraying cavity and a steam cavity; the spraying hole plate divides the spraying cavity into a buffer chamber and a spraying chamber; the spraying cavity liquid inlet pipe is communicated with the buffer chamber, and the spraying cavity liquid outlet pipe is communicated with the spray chamber; the array nozzles are arranged on the spraying hole plate and located at one side of the spraying chamber; a plurality of through holes communicated with the buffer chamber and the array nozzles are formed in the spraying hole plate; the steam cavity and the array nozzle are oppositely arranged, and a phase change working medium is sealed in the steam cavity. The steam cavity and the spraying cavity are integrally connected, the steam cavity can timely and evenly expand high-heat-flow-density heat generated by an electronic element to the spraying surface, the working medium in the spraying cavity is sprayed to the spraying surface at a high speed through the array nozzles, and a large amount of heat is brought away through convection and phase change, thereby achieving the cooling effect on the electronic element.

The invention relates to a high-temperature superconducting receiver front-end device in space. The high-temperature superconducting receiver front-end device comprises a refrigerating machine, a vacuum dewar and a superconducting filter and a low-temperature amplifier which are arranged in the vacuum dewar. One end of the superconducting filter is fixedly arranged in the vacuum dewar through an adiabatic support structure, and the other end of the superconducting filter is connected with the low-temperature amplifier. A heat-conducting band is disposed between the superconducting filer and the low-temperature amplifier. One end of the heat-conducting band is positioned between the superconducting filer and the amplifier, and the other end of the heat-conducting band is connected with a cold head of the refrigerating machine. The superconducting filter and the low-temperature amplifier are arranged up and down. The adiabatic support structure contains an adiabatic support plate and an adiabatic strut. One end of the adiabatic strut is fixedly connected with the adiabatic support plate, and the other end of the adiabatic strut is fixedly connected with the bottom of the vacuum dewar. The heat-conducting band is multilayered copper foils. An adiabatic layer is arranged on the periphery of both the superconducting filer and the low-temperature amplifier. According to the invention, volume of the receiver front-end is minimized; stability of the receiver front-end structure and low thermal capacitance and low heat leakage of the system are also guaranteed; and performance and working stability of the receiver front-end are raised.

The invention provides a multi-model online comprehensive calculation method for power transmission line wind pressure caused by a tropical cyclone. According to the technical scheme, an iterative structure with four inner and outer nested layers is involved, wherein whether a power transmission line wind pressure calculation module is started or not is judged according to published real-time cyclone path information in an outermost layer; a sub-process for decomposing and iteratively calculating a migrated wind speed component and a circulated wind speed component is implemented in the second outermost layer; a sub-process for iteratively correcting the weight of each circular current component calculation model is implemented in the second innermost layer; an optimization and identification iterative sub-process for maximum wind speed radius and shape parameters is implemented in the innermost layer. According to the method, the shortcoming of low reliability of a calculation result obtained by a single model is overcome, and the reliability of the calculation result is improved; the method is used for more accurately calculating the value of wind pressure on an overhead power transmission line under a tropical cyclone wind field, and identifying the power transmission line probably to be damaged, a corresponding time window and the probability of damage to the line.

The invention provides a distributed photoelectric integrated active monitoring system and a method of long-distance buried pipeline leakage, which belong to the field of safety monitoring of important energy facilities. According to the distributed photoelectric integrated active monitoring system, a distributed photoelectric integrated temperature sensor with an electric tracing band active heating function is arranged in a buried pipeline foundation along the side lower position of a pipeline, an electric tracing band in the distributed photoelectric integrated temperature sensor is electrified and heated on time, additionally, the temperature of the pipeline foundation is collected in real time by a distributed optical fiber raman temperature measuring system, and distributed temperature curve inflection points are compared with historical data, so that the leakage position and size of the long-distance buried pipeline are actively identified and positioned. The distributed photoelectric integrated active monitoring system has the effects that optical fiber is combined with the electric tracing band, and the electric tracing band is actively heated, so that the pipeline leakage is identified and positioned with high precision according to the temperature difference caused by the difference of medium heat conductivity coefficients, and the problem of monitoring the leakage of the buried pipeline for conveying crude oil at different temperatures is effectively solved.

The invention discloses a tropical cyclone automatic intensity determination method based on active and passive microwave remote sensing observation. The method is based on a correlation vector machine combined with tropical cyclones obtained through active and passive microwave remote sensing observation. The method comprises: automatically acquiring brightness temperature of the microwave radiometer and information of a sea surface wind field of the microwave scatterometer; and then according to the tropical cyclone intensity estimation model, processing brightness temperature and sea surface wind field information within the range of passing time close to one hour and latitude and longitude of the typhoon center of 0.5-2.5 degrees, and finally obtaining the tropical cyclone grade of theground near the tropical cyclone center. The method is simple in processing process, high in practicability, low in cost, high in precision and easy to operate, and does not need any assumption for the performance of the tropical cyclone intensity estimation system.

The embodiment of the invention discloses a method and device for forecasting tropical cyclone generation frequency, equipment and a storage medium, and the method comprises the steps: carrying out the stepwise regression analysis of the characteristic value of a variable which may influence the tropical cyclone generation and the generation frequency of the tropical cyclone generation, carrying out the inspection, and keeping the variable if the inspection is passed; and forecasting by using a neural network method by using the reserved variable as a characteristic value and the generation frequency generated by the tropical cyclone as a forecast quantity. According to the method for forecasting the tropical cyclone generation frequency provided by the embodiment of the invention, the influence of atmosphere and ocean on tropical cyclones is considered. The mapping relation between the characteristic values and the forecast quantity does not need to be considered, and the nonlinear relation between tropical cyclone generation and the climate background field does not need to be considered. A forecasting model is optimized, and the forecasting accuracy is improved.

The invention relates to an X-waveband refrigeration polarizer cooling structure device which comprises a polarizer, an upper waveguide cavity and a lower waveguide cavity. One end of the polarizer is connected with the cold end of a refrigerating machine through heat conducting strips, and the other end of the polarizer is connected with the end, not opposite to the upper waveguide cavity, of the lower waveguide cavity. A slot waveguide, the polarizer and the cold end of the refrigerating machine are located inside a vacuum cavity. The end, not opposite to the lower waveguide cavity, of the upper waveguide cavity is connected with the vacuum cavity. The heat conducting strips are a plurality of copper foils, wherein the ends of the copper foils are welded in a pressure mode. The vacuum cavity comprises a cavity body and a cover plate fixedly connected with the cavity body. A thermal insulation cylinder is arranged on the periphery of the slot waveguide, one end of the thermal insulation cylinder is fixedly connected with the inner wall of the cavity body, and the other end of the thermal insulation cylinder is fixedly connected with the end, connected with the lower waveguide cavity, of the polarizer. The upper waveguide cavity is fixedly connected with the cover plate, a sealing film is arranged between the upper waveguide cavity and the cover plate, and a gasket is arranged between the thermal insulation cylinder and the polarizer. According to the X-waveband refrigeration polarizer cooling structure device, due to the fact that the polarizer works under the vacuum and low-temperature environment, the equivalent noise temperature of the polarizer is reduced, and the quality of received signals is improved.