121results about How to "The process is simple and convenient" patented technology

The invention provides a power distribution network measurement data completion method and system, computer equipment and a medium, and belongs to the technical field of power distribution system state estimation, and the method comprises the steps: S1, building a standard matrix completion model according to a power distribution network measurement data missing problem; s2, according to power distribution network data feature analysis, linear constraint is added based on the constructed standard matrix completion model, and a complete power distribution network measurement data completion model is constructed; s3, solving the complete power distribution network measurement data completion model by using an alternating minimization method to obtain a power distribution network measurement data matrix after single-moment completion; and S4, performing state estimation on the next moment of the unknown state of the power distribution system by using the complemented measurement data matrix of the power distribution network in combination with a moving average method. The method can well adapt to a novel power distribution system with a high measurement data missing proportion, still has a good completion result under the heavy load condition, and is high in credibility.

The invention discloses an indirect identification method for the scouring depth of a deepwater bridge foundation, and the method comprises the steps: obtaining a high-speed train-rail-sea-crossing bridge dynamic model and scouring simulation data, and solving the high-speed train-rail-sea-crossing bridge dynamic model according to the scouring simulation data, obtaining the dynamic response of each subsystem of the train, the track and the bridge; performing parameter sensitivity analysis on the dynamic response of each subsystem based on the scouring depth change, and screening characteristic indexes meeting preset conditions; fitting the characteristic indexes with the scouring depth to obtain a fitting function relational expression; and obtaining a real-time characteristic index value, and obtaining the basic scouring depth based on the fitting function relation and the real-time characteristic index value. According to the method, the foundation scour depth of the high-speed railway train-rail-sea-crossing bridge system can be well identified in the operation stage, and the method has good engineering application potential and practical value.

The invention discloses an offset minimum sum LDPC (Low Density Parity Check) code decoding algorithm based on a model-driven neural network, and relates to an offset minimum sum LDPC code decoding algorithm. The invention aims to solve the problem that a traditional LDPC decoding algorithm is insufficient in convergence speed, calculation complexity, flexibility and the like. The method comprises the following steps: step 1, constructing a model-driven offset minimum sum algorithm network model, wherein the network model comprises an input layer, a check node layer, a variable node layer and an output layer; step 2, an input layer calculates a receiving channel LLR by using the receiving signal y to carry out initialization; step 3, the check node layer calculates the LLR value of the CN-to-VN; step 4, the variable node layer calculates the LLR value of the VN-to-CN; and step 5, calculating final decoding output by an output layer. The invention belongs to the technical field of decoding.

The present invention relates to the technical field of energy impact testing machines, and discloses an electric lifting and pendulum low-energy impact testing machine, including a base, a placing table is provided on the base, an impact test block is placed on the placing table, the placing table is composed of a pair of trapezoidal plates distributed front and back, a fixed card block is provided on the top of the placing table, the impact test block is placed in the fixed card block, and an automatic calibration mechanism for the test block that can be automatically raised and lowered is provided at the bottom of the placing table. Compared with the prior art, the beneficial effects of the present invention are: without the need for a manual hand-held calibrator, the calibration block can be automatically moved to the calibration position, and then the impact test piece can be quickly calibrated, the operation is convenient, and the degree of automation of the device is improved; the quick docking mechanism can make the whole process simpler, and only the push-pull rotation pressing block is required to achieve the connection and fixation of the pendulum, which improves the installation efficiency; the release and withdrawal pin and the lifting and fixing of the pendulum can be achieved through a pneumatic withdrawal pin mechanism, which enhances the overall intelligence and automation of the equipment.

The invention provides a foundation pit protection system and method, and relates to the technical field of foundation pit protection, and the foundation pit protection system comprises a first sliding seat, a sliding vertical frame, a protection plate, a second sliding seat, an elastic support, a protection frame and a protection chain. According to the protective fence, the protective fence of the inverted-T-shaped structure is adopted, and the sliding vertical frame and the protective plate can slide in the length direction of the first sliding base; a second sliding seat is designed, the second sliding seat, the first sliding seat and a sliding vertical frame form a triangle, the second sliding seat is supported by an elastic support, and the structure can form an elastic slope towards the inner side of a foundation pit by means of the inclined second sliding seat; the foundation pit protection system can be effectively prevented from being damaged by machines and falling objects in the foundation pit internal construction process, outward movement of the foundation pit protection system can be efficiently and rapidly completed in the foundation pit expansion process, the labor cost is greatly reduced, and the construction period is shortened.

The present invention provides a preparation method and application of a carbon-coated lithium sulfide hollow sphere positive electrode material, which belongs to the field of new energy technology. The lithium sulfide / carbon composite positive electrode material is composed of a carbon layer coating a lithium sulfide hollow sphere to form a three-dimensional network structure. Preparation method: lithium sulfate spheres are prepared by spray drying, and then fully mixed with a carbon source precursor and subjected to in-situ oxidation and reduction. The composite positive electrode material prepared by the present invention can effectively reduce the cost of lithium sulfide and shorten the material preparation cycle, wherein the carbon layer has a large contact area with the hollow lithium sulfide sphere, which can significantly enhance the conductivity and electrochemical activity of the material.

The utility model provides grouting equipment for building construction, which relates to the technical field of grouting equipment and comprises a supporting bottom plate, a grouting pump is fixedly mounted on the upper surface of the supporting bottom plate, a slurry storage box is mounted at the input end of the grouting pump, a screening component is arranged on the slurry storage box, a conveying pipeline is mounted at the output end of the grouting pump, and a screening component is arranged on the conveying pipeline. According to the cement paste filling device, when cement paste is poured into the paste storage box, the cement paste is filtered once through the screen, large impurities contained in the cement paste are filtered out, and the cement paste can be filled into the paste storage box, so that the cement paste can be filled into the paste storage box; the situation that large sundries enter the grouting pump to cause blockage is prevented, and the output end of the hydraulic cylinder stretches and retracts back and forth, so that the mounting frame can be driven to move back and forth, the screen is made to shake back and forth, and the cement paste screening efficiency can be improved.

The utility model discloses a concrete pavement repairing device. The concrete pavement repairing device comprises a base, a mixing barrel, a vibrating mechanism and a driving mechanism, the mixing barrel is mounted on the base, a mixing structure is arranged in the mixing barrel, and the mixing barrel is provided with a feeding port for concrete to enter and a discharging port for concrete to be discharged. The vibrating mechanism is installed on the base and used for vibrating concrete discharged from the discharging opening in a reciprocating mode. The driving mechanism is mounted on the base, and is connected with the stirring structure and the vibrating mechanism so as to drive the vibrating mechanism to reciprocate to vibrate concrete while driving the stirring structure to stir in the stirring barrel. According to the concrete pavement repairing device, a road pit can be automatically filled with concrete, the filled concrete can be automatically vibrated and compacted, the process is simple and convenient, and the construction efficiency is improved. Meanwhile, the driving mechanism can realize stirring of the stirring barrel and vibration of the vibration mechanism at the same time, so that the structure of the concrete pavement repairing device can be simplified, and the cost is reduced.

The invention discloses a binocular parallelism error measuring device and method for a microscope. The binocular parallelism error measuring device of the microscope comprises a base and a first measuring assembly and a second measuring assembly which are located on the base, the first measuring assembly comprises a first detector, a first lens cone and a first objective lens which are connected in sequence, and the second measuring assembly comprises a second detector, a second lens cone and a second objective lens which are connected in sequence. The first objective lens and the second objective lens are used for respectively aligning with an ocular lens of a binocular microscope to be detected, and the first detector and the second detector are used for respectively displaying respective centers and received cross images of the binocular microscope on a display device.

The invention provides a preparation method of a mesenchymal stem cell exosome incubated by a GLP-1 medicine. The preparation method comprises the following steps: S1, preparing materials; s2, separating the human adipose tissue-derived stromal cells; s3, cell surface marker protein detection; s4, carrying out GLP-1 incubation; and S5, extracting the exosome. According to the preparation method of the mesenchymal stem cell exosome incubated with the GLP-1 medicine, the human adipose tissue-derived stromal cell exosome is collected in a specific mode, the whole process is simple and convenient, the obtained human adipose tissue-derived stromal cell exosome is stable in effect, damage of myocardial cells after myocardial infarction can be effectively relieved, the heart function can be enhanced, and the human adipose tissue-derived stromal cell exosome can be used for treating myocardial infarction. The compensatory cardiac machine load is reduced, and the heart failure is relieved.

The dendrobium candidum sorting device comprises a sorting box, a collecting box and a material guide groove, the collecting box is arranged on one side of the sorting box, the material guide groove is formed in the upper end of the collecting box, a movable block is arranged at the bottom of the collecting box, a vibration motor is arranged at the bottom of the movable block, a movable baffle is movably connected to the side face of the collecting box, and the movable baffle is movably connected to the bottom of the collecting box. A driving box is arranged on the side face of the guide groove, an electromagnet is arranged on one side of the driving box, a partition plate is movably connected to the other side of the electromagnet, a partition plate groove is formed in the surface of the partition plate, and a touch switch is arranged on the surface of the electromagnet. By arranging the collecting box and the partition plate, when a worker carries out subsequent airing operation, the worker can carry out airing without pouring out and spreading the dendrobium officinale in the collecting box, then the workload of the worker is reduced, meanwhile, the process of taking out the dendrobium officinale is simpler and more convenient, and the working efficiency is improved. In the taking-out process, dendrobium officinale on the surface of the partition plate is not prone to inclining and falling

The present application discloses a method and a display device for quickly starting broadcasting in speaker mode. When an external device is connected, it is determined whether the display device is in speaker mode. When in speaker mode, the data interface is switched to the target physical channel where the external device is located to directly start the external device; after the switching is completed, the display is notified to turn on the screen, and the display device automatically exits the speaker mode. In addition, when the display device in speaker mode is connected to an external device, if it is detected that the current display state of the display is inconsistent with the target display state required by the external device, the rotating component is controlled to rotate the display to the target display state. After the rotation is completed, the content provided by the external device is displayed on the display after rotation and in the on-screen state, so as to realize the rapid start of the content of the external device. It can be seen that the method and the display device can trigger a touch-to-play service. The process does not require user operation, and the display device can be automatically executed. The process is relatively simple and the user experience is good.

The present invention relates to a stepped combined cable bridge which is easy to install and adjust, comprising a vertical rod fixed on a wall and a horizontal plate arranged directly below the vertical rod, both ends of the horizontal plate are fixedly connected with connecting ropes, the connecting ropes penetrate the vertical rods and extend into the wall, a gathering block is also fixedly provided in the wall, two connecting ropes are gathered by the gathering block and hang down, a bearing plate is provided on the horizontal plate through a lifting mechanism, two layers of bridge frames are arranged on the bearing plate, two fixing blocks are fixedly provided on the lower wall of the bridge frame, the fixing blocks on the bottom wall of the lower layer of the bridge frame are placed on the bearing plate, a plurality of rotating cavities are provided on the inner wall of the vertical rod, and rotating plates are rotatably provided in the plurality of rotating cavities; the present invention realizes a convenient installation process of the bridge frame, and there is no need to manually climb up to install it. During the entire installation process, the installer only needs to stand on the ground to complete the work.

The present application relates to a kind of preparation method and application of metal phthalocyanine-graphite phase carbon nitride / graphene ternary composite material, it solves the problem of poor dispersibility, easy aggregation and poor conductivity of metal phthalocyanine material as electrocatalyst.Existing Preparation method steps include: metal phthalocyanine, graphite phase carbon nitride are added to sulfuric acid, after heating stirring, solution A is prepared by cooling;Solution B is prepared by stirring after adding sodium nitrite to solution A under ice bath;Graphene oxide is ultrasonically dispersed in distilled water to prepare solution C;Solution B is added dropwise to solution C and stirred, then ascorbic acid is added and stirred, the product is centrifuged, washed and dried to prepare metal phthalocyanine-graphite phase carbon nitride / graphene ternary composite material.The ternary composite material prepared by the method is a two-dimensional sheet structure, has high dispersibility, large specific surface area, good conductivity and structural stability;The product of the present application can be used for electrocatalytic reduction of carbon dioxide.

The utility model provides photovoltaic power generation equipment and an offshore floating type photovoltaic power generation system, and the photovoltaic power generation equipment is used for the offshore floating type photovoltaic power generation system. The photovoltaic power generation equipment comprises a floating body assembly, a photovoltaic assembly and a connecting assembly. And a mounting plate is arranged on the floating body assembly. And the photovoltaic module is mounted on the mounting plate. The connecting assembly is arranged between the floating body assembly and the photovoltaic assembly, and the connecting assembly comprises a bonding layer. The bonding layer is arranged on the mounting plate, and the photovoltaic module can be bonded on the bonding layer. According to the photovoltaic power generation equipment provided by the utility model, the installation process between the photovoltaic assembly and the floating body assembly is simple and convenient, the operation difficulty is low, the process is fast, the time is short, and offshore operation is facilitated. The photovoltaic power generation equipment provided by the utility model is simple to operate and short in construction time especially in deep and far sea areas with more extreme weather and complex construction environment, can perform construction operation in a window period between the extreme weather, and is favorable for being used in the deep and far sea areas.

The invention discloses a dual-mode artificial neuron memristor and a manufacturing method thereof. The memristor device sequentially comprises a bottom electrode, a resistive layer and a top electrode from bottom to top, the bottom electrode is a P-type highly-doped pure silicon wafer, the resistive layer is an oxide thin film layer, and the top electrode is a thermally-evaporated silver electrode. The resistance change mechanism of the memristor is mainly the connection and disconnection of the silver conductive wire, and different switching behaviors can be displayed under different limiting currents, so that the memristor can switch a volatile mode and a non-volatile mode by adjusting the limiting current of soft breakdown, and if the limiting current Icc during soft breakdown is relatively large, the memristor can be switched to be in a non-volatile mode or a non-volatile mode by adjusting the limiting current Icc during soft breakdown. The device shows stable non-volatility; if the Icc is small, the silver conductive wire is fragile and easy to break, so that the device shows stable volatility. In addition, the memristor device can also simulate the integral ignition behavior of the IF model.

The vision detection device comprises a detection mirror, the detection mirror comprises a mirror frame and mirror legs, the inner side of the mirror frame is connected with a covering piece in a sliding mode, the inner side of the mirror frame is fixedly connected with a sliding block, a sliding way is formed in the outer side of the covering piece, and the sliding block is located in the sliding way and is in sliding fit with the sliding way. Side supporting rods and positioning rods are rotationally connected to the outer sides of the mirror frames, the side supporting rods are rotationally connected with the ends of the positioning rods, wiping strips are rotationally connected between the side supporting rods, the side supporting rods are telescopic elastic rods, limiting discs are fixedly connected to the ends of rotating shafts of the positioning rods, and protruding blocks are fixedly connected to the inner sides of the limiting discs; according to the utility model, the device is simple and convenient to wear, can adapt to different detection requirements, is labor-saving, tight and reliable, can wipe and disinfect the covering sheet, improves the safety, and is not easy to lose cleaning parts.

The present disclosure relates to a dual-polarized radiation unit for an antenna, an antenna and an antenna system. A dual-polarized radiation unit for an antenna includes: four dipoles, wherein radiation arms of the four dipoles are planar and symmetrical about the two mutually perpendicular lines, wherein the two mutually perpendicular lines divide the radiation unit into four regions, and a center portion of the four regions is direct current-conducting, and wherein each of the four regions has a hollow region.

The invention relates to the technical field of communication iron towers, in particular to a communication iron tower with a landscape platform which comprises an iron tower body, the landscape platform is arranged at the top of the iron tower body, a sunscreen mechanism is arranged in the landscape platform and comprises a sunshade roller shutter, and an extension block is fixed to the bottom of the sunshade roller shutter and is fixed to the top of the iron tower body. The iron tower maintenance device has the beneficial effects that when maintenance personnel need to carry out maintenance, the U-shaped lock is unlocked, then the movable head is pushed into the hollow sleeve, the movable head leaves from the transverse groove of the vertical plate, and the movable head is fixed to the top of the iron tower; at the moment, the containing box is not limited any more, the containing box slides to the bottom of the climbing channel along the sliding rails under the action of the gravity of the containing box to open the inlet, then the maintainer enters the climbing channel through the inlet and climbs to the landscape platform on the top of the iron tower along the crawling ladder, and the guard bars can protect the maintainer conveniently.

The utility model relates to the technical field of unmanned aerial vehicles, and discloses a back electromotive force suppression device for a multi-rotor unmanned aerial vehicle, which comprises a vehicle body, the outer side of the vehicle body is fixedly connected with four extension arms, the bottom ends of the four extension arms are respectively provided with a driving assembly, the top ends of the driving assemblies are fixedly connected with paddles, and the blades are fixedly connected with the outer side of the vehicle body. The interior of the extension arm is slidably connected with a suppressor, the interior of the suppressor is provided with a clamping groove, the interior of the extension arm is provided with a placement groove, the interior of the placement groove is slidably connected with a clamping column, the outer side of the clamping column is fixedly connected with a pushing piece, and the interior of the placement groove is provided with a first pushing spring; the bottom end of the clamping column is rotationally connected with a driving piece. According to the utility model, the clamping column is clamped with the clamping groove, so that the suppressor can be quickly fixed and dismounted, the dismounting and maintenance process is simpler and more convenient, the maintenance difficulty is reduced, the maintenance flexibility is improved, and the downtime is shortened.

The utility model relates to a sensor installation device, a sensor assembly and a truck scale, the sensor installation device is used for installing a sensor, the sensor is provided with an identification position, the sensor installation device comprises a fixed part, a movable part and an indication assembly, the other end of the movable part is detachably connected with the other end of the fixed part, and the movable part and the fixed part can define a mounting cavity for accommodating part of the sensor; the indication assembly comprises an extension piece arranged on the side, away from the movable piece, of the fixed piece and is used for indicating the identification position. The sensor mounting device is simple in structure, the sensor is convenient to disassemble and assemble, and when the sensor is mounted on the truck scale, it can be ensured that the identification position is consistent with the load direction of the truck scale only by controlling the extension part to be consistent with the load direction of the truck scale, so that a user can conveniently align and check the sensor, the mounting precision of the sensor is high, and the mounting efficiency is high. Therefore, the weighing accuracy of the truck scale is ensured.

The invention discloses a manufacturing method of an intermittent welding seam marking device. The manufacturing method comprises the following steps that a marking needle rod I included in a continuous marking device I is used for completing continuous marking marks on welding seam positions between to-be-welded parts; the section welding interval scribing device comprises a second scribing rod, and continuous scribing traces at the weld joint position are subjected to interval crossing position scribing; and marking the weld length and the interval length of the weld sections into position lines according to the marking traces at the interval crossing positions. According to the design, rapid scribing can be carried out on the intermittent welding seam position of a butt joint path, the method is also suitable for welding tailor-welded parts with various paths, the manufacturing method of the scribing device is reasonable, novel and unique in structural design, operation is convenient and rapid, the measurement stability is high, and the production efficiency is high. And the operation error caused by visual steel ruler lineation operation in the traditional method is effectively reduced.

The utility model discloses a glass fiber reinforced plastic cylinder excircle glue scraping and cleaning device, which relates to the technical field of glass fiber reinforced plastic production, and comprises a mounting rack and glass fiber reinforced plastic, the two sides of the mounting rack are symmetrically and rotatably connected with mounting discs, and the side wall of one side of the mounting rack is fixedly connected with a first motor; the output end of the first motor is fixedly connected with the side wall of one mounting disc, the glass fiber reinforced plastic is arranged between the two mounting discs, the glue scraping assembly is installed at the top end of the mounting frame and used for evenly scraping glue on the outer circle of the glass fiber reinforced plastic, and the auxiliary cleaning assemblies are installed on the two sides of the glue scraping assembly and used for cleaning the outer circle of the glass fiber reinforced plastic. The blowing device is used for blowing away chippings or fiber dust generated during glue scraping and reducing adhesion; in the axial winding process of the glass fiber reinforced plastic, the glue scraping box reciprocates left and right along the outer ring wall of the glue scraping box, uniform glue scraping is continuously carried out, compared with manual glue scraping, the process is simpler and more convenient, and the product quality is guaranteed.

The application discloses a model-driven neural network-based offset min-sum LDPC code decoding algorithm and relates to an offset min-sum LDPC code decoding algorithm. The application is designed to solve the problems of the traditional LDPC decoding algorithm in convergence speed, calculation complexity, flexibility and the like. The application comprises the following steps: 1, a model-driven offset min-sum algorithm network model is constructed, wherein the network model comprises an input layer, a check node layer, a variable node layer and an output layer; 2, the input layer is used to calculate the received channel LLR by using a received signal y to perform initialization; 3, the check node layer is used to calculate the CN-to-VN LLR value; 4, the variable node layer is used to calculate the VN-to-CN LLR value; and 5, the output layer is used to calculate a final decoding output. The application belongs to the technical field of decoding.

A kind of preparation method of super copper / carbon nanotube composite material, by the treatment of strong oxidant potassium permanganate and hydrogen peroxide, carbon nanotube is oxidized and peeled off, and high-dispersity oxidized and peeled off carbon nanotube aqueous solution is obtained, copper, the precursor of oxidized and peeled off carbon nanotube composite material is co-deposited using pulse electrodeposition method, and super copper / carbon nanotube composite material is obtained by annealing-rolling-annealing treatment.Oxidized and peeled off carbon nanotube is inserted in copper matrix, and uniform distribution is realized.In addition, pulse electrodeposition process and annealing treatment can effectively reduce the oxygen content of composite material and optimize material structure.Therefore, the super copper / carbon nanotube composite material of the present application is superior to the characteristics of pure copper in electricity, heat and mechanics, and the preparation method is simple and easy to operate, and has good and wide application prospect in the field of electronic power, energy and other related fields.

The present application discloses a method for determining the thermal physical property parameters of a battery and a related device and storage medium. The method comprises: performing a constant temperature charge and discharge test on a target battery, and obtaining the static temperature change data and the operating voltage data of the target battery; fitting the convective heat transfer coefficient using the static temperature change data of the target battery, and substituting it into the coupling model of the target battery; performing a heating simulation on the coupling model of the target battery according to the heat generation rate curve, so as to calculate the simulated temperature curve and the simulated voltage curve through the model; judging whether the error between the simulated temperature curve and the actual temperature curve, and the error between the simulated voltage curve and the actual voltage curve are both less than the corresponding preset errors; if they are not both less than the preset errors, adjusting the values ​​of the target parameters in the model, and returning to perform a heating simulation on the model; wherein the target parameters include at least the thermal physical property parameters of the target battery; if they are both less than the preset errors, outputting the values ​​of the various thermal physical property parameters in the model.

The invention belongs to the technical field of tissue culture, and relates to a pithecellobium clypearia filament callus induction method and application, and the method comprises the following steps: taking pithecellobium clypearia buds, disinfecting and sterilizing with a disinfectant, taking pithecellobium clypearia filaments as explants in a sterile environment, inoculating the explants into an induction culture medium for dark culture to form calluses, and carrying out tissue culture to obtain the pithecellobium clypearia filament callus. And then transferring the callus to a proliferation culture medium for subculture proliferation to obtain the callus with higher quality. The induction method provided by the invention can induce pithecellobium clypearia filaments to quickly form calluses, and the induction rate of the calluses is as high as 100%; the induction method of the pithecellobium clypearia filament callus is short in cultivation period, high in induction efficiency and low in pollution rate, the research path of a pithecellobium clypearia rapid propagation technology is widened when the induction method is applied to pithecellobium clypearia cultivation, it is possible that pithecellobium clypearia filaments are regenerated into plants, and high-quality plants with excellent characters can be cultivated.

The utility model relates to the technical field of biogas desulfurization, and discloses purification equipment for biogas desulfurization. According to the device, a metal wire grid is internally provided with a desulfurizing agent placing outer cylinder and a desulfurizing agent placing inner cylinder, the desulfurizing agent placing outer cylinder is internally provided with the desulfurizing agent placing inner cylinder, and the side surface of the desulfurizing agent placing inner cylinder is fixedly connected with a plurality of inserting heads; and a detachable head inner inserting groove and a blocking head inner inserting groove are inserted into the inserting head through a hole groove formed in the inserting head. And a desulfurizing agent is placed in the inner cylinder by virtue of air flow to integrally rotate, so that full contact between the whole desulfurization material and the gas is realized, and the situation that desulfurization treatment is not in place due to contact of one surface is avoided. Wherein the metal wire grid can be used for neatly placing treatment materials, the treatment materials are prevented from scattering everywhere in the device, the desulfurizing agent placing outer cylinder is separated from the desulfurizing agent placing inner cylinder, and the reaction materials can be mounted in the desulfurizing agent placing inner cylinder, so that the replacement is easy.

The invention discloses a thermal resistance calculation method for series-parallel heat exchangers of a compressed air energy storage system, and belongs to the field of compressed air energy storage. Aiming at different arrangement modes of the heat exchangers of the whole system, a heat exchanger model is established based on standard thermal resistance of the heat exchangers of inlet temperature and pressure; a heat exchanger is simplified through a standard thermal resistance method and decomposed into a plurality of equivalent thermal resistances, and temperature distribution of different thermal resistances is calculated through a series and parallel circuit rule. According to the method, the defects of a traditional heat exchanger modeling mode can be overcome, the heat exchanger model is established based on the standard heat resistance of the heat exchanger of inlet temperature and pressure for different arrangement modes of the heat exchanger of the whole system, and the energy flow model of the heat exchanger is established, so that design calculation of the heat exchanger is simple and convenient, and consideration factors in the heat exchange process are increased; according to the mode, different energy flow models are established through different series-parallel connection modes, and the heat exchange process is simplified.

The present invention relates to the technical field of thermal transfer printers, and discloses a carbon ribbon installation structure, which is used to install a carbon ribbon unit, wherein the carbon ribbon unit includes a driving wheel, a driven wheel, and a carbon ribbon connecting the driving wheel and the driven wheel, and the carbon ribbon installation structure includes two first installation positions, a slideway, and a clamping unit, wherein the two first installation positions are respectively used to install the driving wheel and the driven wheel and limit the radial movement of the driving wheel and the driven wheel; the slideway is connected to the first installation position, and is used for the driving wheel and the driven wheel to slide radially upward; the clamping unit is used to limit the axial movement of the driving wheel and the driven wheel. The structure of the present invention can ensure the stability of the driving wheel and the driven wheel, and can quickly disassemble and install the driving wheel and the driven wheel, so as to facilitate replacement.