92results about How to "Effective cost control" patented technology

The invention discloses a dinaphtho boron oxygen structure derivative and a preparation method and application thereof, and belongs to the technical field of organic light-emitting materials and semiconductors. The dinaphtho boron oxygen structure derivative has the advantages of easily available reaction raw materials, low price, conventional reaction process, high single-step reaction yield and low cost. When the prepared dinaphtho-boron-oxygen structure derivative is applied to a light-emitting layer of an OLED device as a guest light-emitting material, the roll-off efficiency of the device can be effectively reduced, the light-emitting brightness is improved, and the service life of the device is prolonged.

The utility model relates to an environment-friendly epoxypropane production device and belongs to the field of energy-saving and environment-friendly chemical equipment. The environment-friendly epoxypropane production device is characterized in that the production device comprises a chlorohydrination reaction device and a saponification reaction device located at the downstream of the chlorohydrination reaction device; the sedimentation device is positioned at the downstream of the saponification reaction device; the waste liquid recycling device and the filtering device are respectively positioned at the downstream of the sedimentation device; the filter residue recycling device is positioned at the downstream of the filtering device, and the discharging end of the filter residue recycling device is connected with the feeding end of the chlorohydrination reaction device. The production device disclosed by the utility model not only reduces the concentration of hydrogen chloride in a liquid-phase product of a chlorohydrination reaction and the dosage of lime milk in a saponification reaction, but also remarkably reduces the amount of filter residues needing to be additionally treated, so that the production efficiency is improved, environmental friendliness is promoted, more effective cost control is realized, and the production cost is reduced. Therefore, the production cost of the epoxypropane is greatly reduced, and the economic advantage is remarkable.

The invention discloses an electricity consumption information monitoring method and system based on hardware industry electric power big data, and belongs to the technical field of electric power information monitoring, and the method comprises the steps: S1, calculating segmented energy consumption data and classified energy consumption data based on electricity consumption data; s2, correcting the classified energy consumption data based on the working duration and rated power of the production equipment, and detecting whether the classified energy consumption data is abnormal or not; s3, constructing a fitting function by using the classified energy consumption data, the raw material feeding data and the finished product data, and judging whether the fluctuation information is abnormal or not; s4, judging the relationship between the power consumption data of the hardware feeding equipment and the threshold value to determine whether to adjust the feeding speed; s5, calculating the number of theoretical products based on the power consumption of the heating equipment, and adjusting the feeding speed if the actual number is smaller than a theoretical value; and S6, judging whether the heating equipment is abnormal or not according to the load current of the die forging equipment, and sending warning information. According to the scheme, multi-level power fault analysis is carried out on the hardware industry, so that the coverage range of power fault detection can be remarkably expanded.

The invention relates to the technical field of mobile crowdsourcing, in particular to a mobile crowdsourcing implicit dynamic excitation method and system based on an anchoring effect. The method comprises the following steps: constructing an LSTM task price prediction model, namely a TP-LSTM model; task price prediction and service quality prediction are carried out based on tasks by using a TP-LSTM model; performing task information anchoring based on a prediction result; and performing worker recruitment optimal incentive based on task information anchoring, wherein the worker recruitment optimal incentive comprises the optimal incentive of the initial recruitment process and the optimal incentive of the emergency recruitment process. The TP-LSTM model is utilized to significantly improve the accuracy of task price prediction, a time sequence mode in data can be identified and utilized, prediction errors are effectively reduced, and more reliable decision support is provided for a platform.

The invention belongs to the technical field of thin-wall shell impact toughness tests, and particularly relates to a cross-medium underwater vehicle thin-wall shell impact toughness test device and method. The device comprises an underwater vehicle test piece, a test stand column, a guider, an accelerator, an energy accumulator and a test pool, the guider is arranged between the test stand column and the test pool, the underwater vehicle test piece is suspended on the guider, the accelerator and the energy accumulator are both arranged on the test stand column, the stern of the underwater vehicle test piece is connected with the energy accumulator, and the accelerator is connected with the energy accumulator. The bow part is connected with the accelerator, the underwater vehicle test piece is connected with the energy accumulator and the accelerator through the explosion hanging ring, and the energy accumulator is used for accumulating gravitational potential energy for the underwater vehicle test piece and the accelerator; and the accelerator provides an underrush-into-water acceleration for the underwater vehicle test piece. Aiming at the water-entry impact load of the cross-medium aircraft, the water-entry attack angle is effectively controlled by adopting the guider, the water-entry kinetic energy of the aircraft is effectively controlled by adopting the energy accumulator and the accelerator, and the cost is effectively controlled.

The invention relates to the technical field of biomedicine, and discloses a preparation method of a biomedical high-entropy alloy film, which comprises the following steps: step 1, preparing target materials and a matrix, taking an HfMoNbZr quaternary alloy target and a Ta metal target as the target materials, and taking a silicon wafer and 316L stainless steel as the matrix; step 2, removing oil stains and binders on the surfaces of the silicon wafer and the 316L stainless steel substrate; and thirdly, under the vacuum condition, the HfMoNbZr quaternary alloy target and the Ta metal target are subjected to film deposition through a direct-current magnetron sputtering silicon wafer and a 316L stainless steel substrate, and the biomedical high-entropy alloy film is obtained. The biomedical high-entropy alloy film can be prepared, has excellent corrosion resistance and biocompatibility, can promote the development of a high-entropy alloy biomedical film material, and particularly provides a theoretical basis and application value in the aspects of stomatology and orthopedics artificial joints.

The invention discloses a manufacturing method of an underwater flexible pressure sensor based on a structured cavity. The manufacturing method of the underwater flexible pressure sensor based on the structured cavity comprises the following steps: designing and preparing a cavity mold; fluorinating the surface of the cavity mold; preparing a PDMS (Polydimethylsiloxane) cavity base; preparing a pressure sensitive film; packaging the pressure sensitive part; and assembling the packaged pressure sensitive part and the PDMS cavity base. According to the manufacturing method of the underwater flexible pressure sensor based on the structured cavity, an advanced achievement of a flexible electronic manufacturing technology is applied, and effective balance and offset of hydrostatic pressure influence are realized by designing and constructing a flexible micro-cavity structure, so that the sensor can be used in a complex underwater environment, and the underwater flexible pressure sensor based on the structured cavity can be manufactured. And the dynamic pressure change generated by water flow disturbance can be accurately detected, so that a brand new solution is provided for the field of underwater pressure measurement.

The present invention discloses a steering road sense motor system execution unit, including: a road sense upper column assembly penetrates into an upper housing to form an interference fit, a first end of a gear shaft forms a transition fit with a steering wheel, a second end of a gear shaft passes through an inner ring of a bearing in a lower housing through a clearance fit, and a second end of the gear shaft is connected to a direct drive motor through a flexible connector; the lower housing is formed into a variable diameter structure with large ends and small middle, a pressure block hole is formed on the side wall of its small diameter section, and a bearing is fixed in its second large diameter section; a torque sensor is located in the first large diameter section, and the torque sensor collects the driver's hand force and sends it to a direct drive motor controller through a Can command; a pressure block assembly is connected in the pressure block hole; and the direct drive motor controller sequentially controls the road sense motor according to the Can command. The present invention can omit complex mechanical transmission, improve its transmission efficiency, and adopt the selective switching of the SVPWM seven-segment non-conduction time, so that the output three-phase voltage is reduced at different times, and the voltage harmonic amplitude is reduced, and the current fluctuation and torque fluctuation are suppressed.

The invention relates to the technical field of ceramic forming, and discloses a ceramic flowerpot rolling forming device which comprises a base. The forming assembly is used for carrying out rolling forming on the ceramic flowerpot; and the material transferring assembly is used for automatically discharging and automatically feeding the ceramic raw materials. According to the ceramic flowerpot rolling forming device and the rolling technology, through linkage conversion among the forming assembly, the material transferring assembly and the material fixing assembly, the processes of material cutting, material feeding, material transferring, material pressing forming and final discharging can be automatically formed, excessive operation of operators is not needed, multi-direction integration is integrally achieved, the production efficiency is improved, and the production cost is reduced. Therefore, the forming efficiency of the whole ceramic flowerpot is improved, excessive manpower does not need to be input, large equipment does not need to be purchased, rotary circulating type rolling forming is utilized, integrated automatic operation is achieved, the cost can be effectively controlled, manpower can be greatly reduced, and the forming efficiency of the flowerpot is improved to the maximum extent.

The invention discloses a monitoring device for BIM-based intelligent construction and a use method thereof, and relates to the technical field of construction equipment.The monitoring device comprises a mounting frame and further comprises an auxiliary mounting mechanism, and the auxiliary mounting mechanism is mounted on one side of the mounting frame. The power storage bin is used for solar light resource storage processing, power resource consumption of equipment is reduced, a second positioning bolt is used for installing a second monitoring camera and a monitoring equipment installation frame, and real-time monitoring processing is conducted on the visual angle of the bottom of the monitoring equipment installation frame. The sealing outer covers on the two sides of the monitoring equipment mounting frame are matched with the mounting disc to be connected with the top connecting plate, so that the equipment mounting space is saved, and the portable effect in actual use is improved; the device is provided with the temperature control mechanism, integrates the functions of on-site monitoring, portable installation of the device and self-heat dissipation of the device during monitoring, improves the overall use flexibility, and facilitates manual remote management.

The utility model provides a toner cartridge side cover with an integrated injection molding conductive structure, which comprises an inner side part and an outer side part, the inner side part is provided with a plurality of conductive positioning column holes and a plurality of inner circuit connecting bridges, and each conductive positioning column hole is used for sleeving and positioning a printing part. Each inner circuit connecting bridge is connected between power-on contacts of a printing component and is used for forming a power-on loop; the outer side part is provided with external contact pads corresponding to the internal circuit connecting bridges, the external contact pads are communicated with the internal circuit connecting bridges, the side cover is provided with a conductive square groove hole and a drum core positioning column hole in a penetrating manner, and a conductive steel shaft is arranged on the drum core positioning column hole in a fusion welding manner; the conductive square groove hole, the internal circuit connection bridge and the external contact pad are formed by conducting materials in a secondary injection molding mode. The utility model relates to the technical field of toner cartridges.

The utility model relates to a connecting structure of a drilling arm of a drilling machine in the technical field of drilling machine installation, which comprises a connecting seat correspondingly hinged to the outer end of a front arm of an excavator and a hydraulic cylinder of the front arm of the excavator so as to adjust the angle of the connecting seat through the hydraulic cylinder; a fixed part of the hydraulic rotating device is arranged in the middle of the connecting seat, and the hydraulic rotating device is connected to a hydraulic system of the excavator; the middle part of the rear side surface of the drilling arm is correspondingly connected to the rotating part of the hydraulic rotating device; the connecting seat is connected with the excavator forearm and the hydraulic cylinder of the excavator forearm, so that the height of the drilling machine can be controlled through the excavator, and the height stroke of the drilling machine is increased compared with a drill carriage for controlling the position of the drilling machine; the connecting base is connected with the excavator front arm and the hydraulic cylinder of the excavator front arm, and the drilling machine can be adjusted within the 360-degree angle by being matched with the hydraulic rotating device and the excavator mechanical arm.

The beauty instrument handle with the refrigeration function comprises a handheld part, a circuit board is arranged in the handheld part, the handheld part is detachably connected with a treatment part, a connecting part is arranged in the handheld part, and a first conveying pipeline penetrates through the middle of the connecting part; the end, close to the handheld part, of the first conveying pipeline is detachably connected with a second conveying pipeline. The other end is connected with a volatilization device; the second conveying pipeline is connected with a refrigerant medium conveying device, and the first conveying pipeline and the second conveying pipeline are both used for conveying refrigerant media. The treatment part is detachably connected with the handheld part through the connecting part; the treatment part comprises a shell, and a refrigeration sheet, a heat conducting sheet, a treatment sheet and a protective film are sequentially arranged in the shell; according to the invention, through the design of the volatilization device and the conveying pipeline, the rapid and uniform conveying of cold air is realized, and the cooling efficiency is improved.

The invention discloses an automatic honeycomb spraying and dipping device and a using method thereof. The device comprises a rack, a glue solution recovery tank, a spraying device, a sealing cover, a turnover device and a stored material backflow device. The spraying device comprises a spraying head, a transverse rail and a longitudinal rail; the turnover device comprises a fixing frame and a transmission bearing, and the automatic spraying function and the turnover function are combined to achieve control over honeycomb density uniformity; the stored material backflow device comprises a material storage barrel, a flow guide pipe and a pneumatic diaphragm pump; the glue solution recovery tank comprises a tank body, a filter screen and a flow guide port, the stored material backflow device is matched with the glue solution recovery tank to achieve the glue solution self-purification recycling function, the glue solution use amount is greatly reduced, the cost of the high-temperature-resistant honeycomb core material is low, and novel honeycomb machining is facilitated. The device also has a self-cleaning function, and in the working and cleaning process, the whole device is a closed space, so that the solvent is effectively prevented from overflowing, and the environmental protection property and the safety of a working area are improved. The whole device is suitable for low-cost preparation of small-batch high-temperature-resistant honeycomb materials.

The present invention discloses a power management system for an experimental operation table based on face recognition and a method thereof, which is used to control the on and off of the socket power supply on the experimental operation table. The system includes: a switching power supply, an industrial computer, and a multi-channel serial port relay. The method includes the following steps: S1. The switching power supply supplies power to the industrial computer and the multi-channel serial port relay, and the industrial computer controls a camera to obtain the face information of the current person, completes face recognition according to the face information, and sends a serial port communication instruction to the multi-channel serial port relay after the face recognition is successful; S2. The multi-channel serial port relay controls the corresponding relay to be turned on according to the serial port communication instruction, and then supplies power to the socket. The present invention solves the technical problem of safe use of socket power supply for the experimental operation table in laboratory management, can effectively avoid disorderly use of socket power supply for the experimental operation table, and solves the safety hazards existing in long-term power-on of the equipment.

The invention relates to the technical field of building structure engineering, in particular to a bearing and protecting integrated steel beam and a machining method and connecting joint thereof, and the bearing and protecting integrated steel beam comprises a concrete outer cladding layer, inner pouring concrete, a beam rib structure, transverse welding ribs, beam end plates, an inner box type steel pipe and a Z-shaped connector; the transverse welding ribs are welded on the outer wall of the inner box type steel pipe; the beam rib structure is welded on the transverse welding rib; the beam end plates are arranged on the two sides of the inner box type steel pipe in pairs. The inner box type steel pipe is filled with inner pouring concrete. The outer side of the inner box type steel pipe is wrapped with a concrete outer wrapping layer; the beam rib structure is wrapped by the concrete outer wrapping layer. Through optimization design, the thickness of the concrete outer wrapping layer is reduced, and the contribution of the internal box type steel pipe to the flexural capacity of the component is remarkably improved.

The present invention relates to an ion membrane electrolyzer, which comprises a tank frame, on which a plurality of electrolysis unit tank groups (8) are arranged, characterized in that the two ends of the plurality of electrolysis unit tank groups (8) are respectively locked by copper bar end plates, the copper bar end plates are copper bar end plates fixed on a fixed seat or movable copper bar end plates fixed on a top rod seat, and different numbers of electrolysis unit tank groups (8) and copper bar end plates for locking the plurality of electrolysis unit tank groups (8) are selected according to the demand for production capacity, and the copper bar end plates are connected to a power supply. The ion membrane electrolyzer of the present invention has the advantages of good operating stability, free assembly and deployment according to production capacity requirements, low power loss, high production efficiency and high production capacity.

The sealing material guiding device comprises a material collecting part and a material guiding part which are connected in sequence, the end, corresponding to the upstream, of the material collecting part is provided with a feeding port, and the end, corresponding to the downstream, of the material guiding part is provided with a discharging port; the discharge port is configured to correspond to the position of the conveying line; the material guiding part comprises a feeding channel and a material crushing assembly movably arranged in the feeding channel. The material crushing assembly can impact large coal in the feeding channel through self movement to crush the large coal into small coal, and the small coal leaves the feeding channel from the window body under the pushing of the material crushing assembly, so that the problem of space blockage caused by the large coal is solved; the effects of cleaning large coal materials and smoothing the conveying line can be achieved, the requirements for equipment parameters such as power of related components of the material crushing assembly can be lowered, therefore, the equipment cost is effectively controlled, the cost lowering effect is remarkable, low cost of overall transformation of the conveying line is achieved, and the technology can be applied and popularized easily.

The invention discloses a graphene plastic and a preparation method thereof, and relates to the technical field of plastics, the graphene plastic comprises the following components by weight: 100-120 parts of a thermoplastic elastomer, 30-60 parts of a polymer resin, 0.1-0.5 part of modified graphene, and 0.1-0.4 part of a filler; wherein the modified graphene is isocyanate-based graphene, and a preparation method of the isocyanate-based graphene comprises the following steps: step 1, introducing graphene oxide into N, N-dimethylformamide, and carrying out ultrasonic water bath treatment for 0.5-3 hours to obtain a graphene glue solution; step 2, dropwise adding a toluene solution of 1, 6-hexamethylene diisocyanate and a catalyst into the graphene glue solution for reaction, and controlling the reaction temperature to be 80-85 DEG C and the reaction time to be 4-6 hours to obtain a reactant; and step 3, washing the reactant in toluene to obtain the isocyanate-based graphene. The graphene plastic has the effects of improving the dispersing performance of the graphene and improving the strength and wear resistance of the graphene plastic.

The utility model discloses a modularization easy maintenance electric energy meter belongs to the electric energy meter technical field, the electric energy meter comprises a support seat, a metering module, a communication module, a display module and a connecting assembly, one side of the support seat is hinged with a protective cover, one side of the support seat is fixedly provided with a connecting seat, the top end of the connecting seat is provided with a plurality of installing grooves, and the installing grooves are connected with the connecting seat. The metering module, the communication module and the display module are slidably mounted in the corresponding mounting grooves, and the connecting assembly is composed of first connecting parts arranged at the bottom ends of the inner walls of the mounting grooves and second connecting parts arranged at the bottom ends of the metering module, the communication module and the display module. And the first connecting part and the second connecting part are inserted and electrically connected. The electric energy meter is convenient to maintain and flexible in function.

The invention discloses a method for preparing trehalose from purple ears, a purple ear strain is a high-temperature type agaric and is preserved in Guangdong Microbiological Culture Collection Center (GDMCC), the preservation number is GDMCC NO: 62288, and the method comprises the following steps: (1) extracting crushed purple ear sporocarp by adopting an organic solvent, concentrating the obtained extract liquid, adding a concentrated solution into a concentrated solution, and concentrating the concentrated solution to obtain a concentrated solution; carrying out liquid-liquid extraction by using ethyl acetate, water and n-butyl alcohol in sequence, collecting an n-butyl alcohol phase, and dehydrating and concentrating to obtain an organic crude extract; and (2) dissolving the extract obtained in the step (1), and purifying through reverse phase silica gel column chromatography, gel exclusion column chromatography and normal phase silica gel column chromatography in sequence to obtain the trehalose. The extraction and purification process provided by the invention does not need a complex enzyme catalysis or fermentation step, so that the use of an expensive enzyme preparation is avoided.

The utility model belongs to the technical field of radiators, particularly relates to a plug-in type fin provided with a positioning structure, and solves the problems that when plug-in type fins are arranged on a flat tube, the layers of the plug-in type fins in the width direction are uneven, the fins cannot be ensured to be parallel to one another, and the heat exchange efficiency is influenced. The plug-in type fin with the positioning structure comprises a strip-shaped main body, a plurality of plug-in grooves extending in the width direction are formed in the side portion of the strip-shaped main body in the length direction, and the positioning structure is arranged on the strip-shaped main body. And the positioning structure is used for positioning in the width direction when the plurality of groups of strip-shaped main bodies are arranged and enabling the strip-shaped main bodies to be in a mutually parallel state. The fins are positioned and connected into a fin group through the positioning structure, so that the fins are flush in the width direction, the strip-shaped main bodies are parallel to one another, and the heat exchange efficiency is high.

The invention discloses a multifunctional tunnel intelligent detection device which comprises a movable support, a detection instrument moving track arranged close to the inner contour of a tunnel, a detection instrument fixing device, a control system and a traction device. The device has the beneficial effects that the structure is simple, the material consumption is low, the equipment and technology are mature, the influence of detection and construction operation can be reduced by arranging the passage, intelligent and mechanical equipment can be set as appropriate, and the investment cost for manufacturing the device is reduced; an operation platform does not need to be set up repeatedly, detection work of multiple positions of a certain section can be completed at the same time, and different detection items can be completed through laser scanning, geological radar, ultrasonic waves, pressure gauges and other different detection devices. The telescopic arm rod and the replaceable fixing head special for the instrument can be suitable for different detection instruments and equipment and different tunnel sections, operation is convenient and fast, work efficiency is high, and cost can be effectively controlled.

The invention relates to the technical field of thermal power equipment, and discloses a peripheral multi-column steel frame of a washing and absorbing two-tower-in-one structure, which comprises a steel column inner frame, a steel column outer frame and a horizontal support structure: the steel column outer frame and the steel column inner frame are both of a square frame structure; the steel column inner frame and the steel column outer frame are each of a multi-layer frame structure, each layer of frame is formed by horizontally splicing multiple sections of steel beams, and the adjacent layers of frames are vertically connected through stand columns. The steel column inner frame is arranged on the outer side of the center tower in a surrounding mode, and the steel column outer frame is arranged on the outer side of the steel column inner frame in a surrounding mode. The steel column inner frame and the steel column outer frame are connected and fixed through a horizontal supporting structure. Each layer of filler in the central tower and the pipelines outside the tower transmit loads to the peripheral multi-column steel frame; the tower can be used for bearing the load transmitted by the central tower while realizing the integrated arrangement of the water washing tower and the absorption tower, can effectively reduce the wall thickness of the tower wall, reduces the occupied area, increases the height and capacity of the tower, reduces the construction cost, and can flexibly adjust the corresponding height.

The utility model discloses a pin fixing seat assembling module and atomizing core assembling equipment. In the pin fixing seat assembling module, the second assembling body transferring mechanism is arranged on the second mounting frame to transfer the second assembling body from the forming jig, and the pin fixing seat supplying mechanism is arranged to supply each pin according to the set direction. And the pin fixing seat mounting unit is arranged to mount the pin fixing seat into the bracket of the second assembly body and fix the pin, so that automatic assembly of the pin fixing seat is realized, and the assembly efficiency of the pin fixing seat can be effectively improved. And meanwhile, the pin fixing seat is automatically assembled, so that the occupied space and the human input can be reduced, and the cost can be effectively controlled.

The invention discloses an innovative food processing safety guarantee system, which comprises the steps of S1, risk assessment and data protection: regularly performing safety risk assessment, identifying potential vulnerabilities, and implementing a data encryption and backup strategy to ensure data safety; s2, promotion of standardization and compatibility: participating in industry conferences and standard formulation, promoting popularization of technical standards, cooperating with equipment suppliers, and ensuring compatibility between equipment; and S3, cost control and cloud service optimization: analyzing an existing cost structure, searching for an optimization space, and adjusting selection of equipment and services. According to the innovative food processing safety guarantee system, through the encryption technology and authority management, the system can effectively prevent data leakage and hacker attack and guarantee the safety of sensitive information, so that the trust sense of consumers is enhanced, equipment standardization is promoted, a unified platform is developed, data compatibility and efficient integration of different equipment and sensors can be achieved, and the safety guarantee effect is good. Therefore, the system management process is simplified.

The invention relates to the technical field of kelp processing, in particular to a step-by-step recycling method for active ingredients of kelp. According to the method, efficient recovery of phycoxanthine, mannitol, fucoidan and cellulose contained in kelp is achieved through the following steps that the phycoxanthine is extracted from kelp fine powder through supercritical carbon dioxide, and the phycoxanthine is recovered; treating kelp residues after recovery of phycoxanthine by using high-pressure microfluidics, adjusting the pH value, and carrying out freeze drying to recover mannitol; then, carrying out enzymolysis, ultrafiltration separation, organic solvent extraction and alcohol precipitation operation on the kelp residues after mannitol recovery, so as to recover fucoidan; and finally, recovering cellulose from the kelp residues through chitosan flocculation, lactic acid bacteria fermentation decalcification, alkali treatment and enzymolysis. By adopting a step-by-step recovery mode, mutual interference among active components is effectively avoided, kelp is efficiently utilized, and the recovery rate and the purity are improved.

The invention discloses a cascade multi-level energy storage converter topology and a control method thereof, the DC input side of the topology adopts half-bridge sub-modules powered by independent batteries to be connected in series in groups, and the AC output side adopts multiple groups of H-bridge inversion units to be connected in series to form a secondary cascade structure. According to the topology, by flexibly configuring the number of battery packs and the number of half-bridge sub-modules in each group, the optimal balance between the number of switching devices and the voltage stress of the devices is realized, and the topology has the advantages of a cascaded H-bridge topology and a cascaded half-bridge topology. In the control method level, a switching device is controlled based on carrier stacking modulation and zero crossing point modulation, a double-closed-loop quasi-proportional resonance controller is adopted to carry out closed-loop control on an output voltage waveform, an equalization algorithm based on battery state parameter sorting is combined, high-quality multi-level output is achieved, and meanwhile battery online energy equalization is completed. The problems that a multi-level energy storage converter is large in traditional topology device number, high in cost, large in high-voltage device stress, poor in expansibility, difficult in battery management and the like are solved.

The invention relates to the technical field of thermal power equipment, and discloses a peripheral sparse column steel frame of a washing and absorbing two-tower-in-one structure, which comprises a steel column inner frame, a steel column outer frame and a horizontal support structure: the steel column outer frame and the steel column inner frame are both of a square frame structure, and the horizontal section is rectangular; the central tower is arranged in the peripheral sparse column steel frame; the steel column inner frame is arranged on the outer side of the center tower in a surrounding mode, and the steel column outer frame is arranged on the outer side of the steel column inner frame in a surrounding mode. The steel column inner frame and the steel column outer frame are connected and fixed through a horizontal supporting structure. A plurality of rows of horizontal platforms and a plurality of columns of steel latticed columns are arranged on the peripheral sparse column steel frame, and a large cubic space is formed between the two rows of horizontal platforms and the two columns of steel latticed columns; and each layer of filler in the central tower and the pipelines outside the tower transmit loads to the peripheral sparse column steel frame. According to the invention, the occupied area is reduced, the height and the capacity of the tower are increased and the like while the water washing tower and the absorption tower are integrally arranged, the space is relatively wide, and the possibility of collision with a pipeline can be reduced.

This invention belongs to the field of surface polishing technology, and relates to a water-based polishing wax and its preparation method. The water-based polishing wax comprises a first component and a second component. The water-based polishing wax is formed by mixing a slurry of the first component and a viscous liquid of the second component. The first component includes liquid paraffin, glycerin, Tween, acrylic resin, gloss agent, silica micropowder, hydroxyl silicone oil, dispersant, silicon carbide, cerium oxide, and deionized water. The second component includes an acrylic thickener and deionized water. This invention provides a water-based polishing wax with extremely low VOC content, no irritating odor, reduces the risk of thermal damage to the substrate, and improves the surface microstructure quality, as well as its preparation method.