39results about How to "Reduced operational stability" patented technology

The invention relates to a fuel cell and aims at providing a single-chamber microbial fuel cell without a metal catalyst. The cell comprises a cell shell, cathodes and an anode. Electrolyte is water which is filled in the cell shell and contains organic matters. The anode is a titanium core carbon fiber brush made by winding titanium wires and active carbon fibers; the cathodes are carbon cloths or stainless steel meshes with both sides respectively coated by diffusion layers and catalyst layers; and the diffusion layers are contacted with the air and the catalyst layers are contacted with the electrolyte. The cathodes of the invention are composed of multiple diffusion layers and catalyst layers, reduce loss of water due to evaporation and improve stability of the electrodes. One side of each cathode directly faces the air and oxygen is directly diffused to the catalytic surface of the cathode without additional air supply devices and driving force, thus greatly lowering the operation cost and improving the stability. The catalytic materials of the cathodes are active carbons featuring wide sources and low prices, without any metal catalyst, thus greatly reducing the constructive cost. The cell has the characteristics of simple structure, low cost and easy expansion.

The invention relates to preparation of electrodes of fuel cells and aims at providing an air cathode without a metal catalyst and a preparation method thereof. The air cathode comprises a carbon cloth or a stainless steel mesh as a base material. Both sides of the base material are respectively coated by diffusion layers and catalyst layers, wherein the diffusion layers are contacted with the air and the catalyst layers are contacted with electrolyte. The cathode of the invention is composed of multiple diffusion layers and catalyst layers, reduces loss of water due to evaporation and improves stability of the electrodes. One side of the cathode directly faces the air and oxygen is directly diffused to the catalytic surface of the cathode without additional air supply devices and driving force, thus greatly lowering the operation cost of the cell and improving the stability. The catalytic materials of the cathodes are active carbons featuring wide sources and low prices, without any metal catalyst, thus greatly reducing the constructive cost. The air electrode has the characteristics of simple structure, low cost and easy expansion and can be used for producing microbial fuel cells with high properties and low costs and simultaneously purify waste water.

The embodiment of the invention relates to a relay protection system and a special multi-core Soc chip architecture thereof. The special multi-core Soc chip architecture comprises a first dual-channelDDR, a second dual-channel DDR, a management processing core, a communication data processing core, a protection locking processing core, a protection logic processing core, a first secondary cache and a second secondary cache which are integrated on a chip. According to the special multi-core Soc chip architecture for the relay protection system, the four processing cores, the first dual-channelDDR, the second dual-channel DDR, the first secondary cache and the second secondary cache are integrally arranged on the chip, so that the original complex multi-chip hardware architecture is simplified; and low operation reliability and stability of the relay protection system caused by unstable connection of a multi-chip hardware structure are also avoided, and the operation reliability and stability of the relay protection system are improved. The technical problem that the operation stability and reliability of a relay protection product are influenced due to the fact that an existing relay protection multi-chip framework adopts a framework that a plurality of chips adopt a plurality of clamping plates and the multi-chip framework is complex is solved.

The invention discloses a single-end-operated subthreshold storage unit circuit, comprising two PMOS (P-channel Metal Oxide Semiconductor) transistors, namely P1 and P2, and seven NMOS (N-channel Metal Oxide Semiconductor) transistors, namely N1-N7, wherein the body ends of P1 and P2 are connected with a voltage drain-drain Vdd after being connected with the respective sources; the body ends of N1-N7 as well as the sources of N1, N2 and N7 are all grounded; the grid of N3 is connected with a row-writing control signal RWR; the grid of N4 is connected with a column-writing control signal CWR; an inverter is composed of N2 and P2; the output end of the inverter is connected with the grids of N2 and P2; the input end of the inverter is connected with the drain of P1; the grid of the N5 is connected with a reading word line RWL; the drain of N5 is connected with a reading bit line RBL; the source of N6 is connected with a writing bit line WBL; and the grid of N6 is connected with a word writing line WWL.

The invention discloses a preparation method of low-rank coal-based porous carbon with low cost. The coal-based porous carbon with high porosity and graphitization degree is obtained by performing K-based compound high-temperature (900-1200 DEG C) activation treatment on a low-rank coal raw material, and on the other hand, the invention provides the application of the low-rank coal-based porous carbon to the preparation of a supercapacitor. By adopting the scheme, the following advantages that by adopting the low-rank coal raw materials with abundant reserves and low cost, the coal-based porous carbon material with higher porosity and graphitization degree can be obtained by mixing K-based compounds (K2CO3, KOH, K2FeO4 and the like) in a high proportion and carrying out high-temperature activation, cleaning and drying processes; and the coal-based porous carbon material is constructed into the supercapacitor device and shows higher specific capacitance, rate capability and operation stability, can be realized. Compared with a conventional carbon nano material, the coal-based porous carbon material is simple in preparation method and low in raw material cost, is suitable for macro preparation and is beneficial to the promotion of expansion of the application range of the supercapacitor.

The invention discloses a catalytic cracking material pretreatment method, which comprises the following steps: filling a residual oil raw material into a solvent deasphalting device to perform deasphalting treatment; delivering the mixture of deasphalted oil and deeply drawn vacuum gas oil (VGO) to a hydrodemetallization region to perform a reaction in the presence of hydrogen and a demetallization catalyst; and finally, mixing the efflux of hydrodemetallization with one or two of the light wax oil and coker gatch, delivering the mixture to a hydrogenation treatment reaction region to perform a reaction in the presence of hydrogen and a hydrogenation treatment catalyst, wherein a liquid phase separated from the efflux of the hydrogenation treatment reactor is used as a catalytic raw material. When the method disclosed by the invention is used, different catalytic cracking raw materials can be treated stage by stage, the flexible operability and desulfuration efficiency of the device can be improved, and the cost can be reduced.

The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner in a heating mode. By adoption of the control method of the air conditioner inthe heating mode, the problems of poor universality and poor user experience of an existing control method of an air conditioner are solved. The control method of the air conditioner in the heating mode comprises the steps that the outdoor environment temperature and the outdoor environment humidity are obtained; when the outdoor environment temperature is lower than or equal to a temperature threshold, the preheating time of an electric heater is calculated according to a first fitting formula; the closing speed of an expansion valve is calculated according to a second fitting formula; the advanced start time of an outdoor fan is calculated according to a third fitting formula; the frequency increase speed of a compressor is calculated according to a fourth fitting formula; the electricheater, the expansion valve and the outdoor fan are controlled to operate; and when the electric heater/expansion valve/outdoor fan meets set conditions, the frequency of the compressor is controlledto be increased at the frequency increase speed. By adoption of the control method of the air conditioner in the heating mode, the universality of the air conditioner can be improved, and the user experience is improved.

The invention provides a membrane wing folding system which comprises two inner cross beams fixedly arranged at the top of a machine body, the two ends of each inner cross beam are connected with outer cross beams through electric folding mechanisms, wing membranes are arranged between the two inner cross beams and between the two outer cross beams, and each electric folding mechanism comprises a rotating motor, a push-pull screw, a power spiral sleeve and a rotating connecting rod. The rotating motor is connected with and drives the spiral sleeve to rotate, the spiral sleeve is arranged on the push-pull screw in a sleeving mode and is in threaded connection with the push-pull screw, the push-pull screw is arranged in the inner cross beam in a sliding mode, one end of the rotating connecting rod is rotationally connected with the end of the push-pull screw, the other end of the rotating connecting rod is rotationally connected with the outer cross beam, and the outer cross beam is rotationally connected with the inner cross beam. Before taking off and landing, the wing membrane is folded and put away, namely the effect of reducing the resistance of the wing to the dual-mode aircraft in the vertical direction when the dual-mode aircraft ascends and descends can be achieved, and then the purpose of ensuring that the dual-mode aircraft applying the membrane wing folding system has high operation stability when the dual-mode aircraft ascends and descends vertically is achieved.

The invention discloses a turbine control valve quick-closing system control method based on fault critical mute time. On the basis of original triggering logic for a turbine control valve quick-closing function, judgment of power system fault types and selection of delay time are added. Turbine control valve quick-closing function triggering conditions under different faults are determined through analogue simulation of transient faults of a power system, and thus the optimum control valve quick-closing action delay time of different power generators under the active power (a per-unit value)is determined through analogue simulation of three-phase short troubles of the power system and according to fault critical mute time and power plant earth fault current disappearing time. By adoptionof the control method, fluctuation of transient abnormal power signals can be shielded, adverse effects on safe operation of a unit caused by delay during unit sudden load change can also be avoided,and safety and stability of the power system are effectively guaranteed.

The invention discloses a cooling protection system and method applicable to an activated coke drying method. The cooling protection system applicable to the activated coke drying method comprises anactivated coke adsorption reaction system, a supply device and a heat exchanger, wherein the activated coke adsorption reaction system is used for purifying an untreated gas; the supply device is usedfor providing a heat exchange gas; the activated coke adsorption reaction system is provided with a temperature sensor for detecting the temperature of an activated coke layer, a gas inlet flue for feeding the untreated gas, and a gas outlet flue for discharging a tail gas formed after the untreated gas is purified; and an oxygen content sensor for detecting the content of oxygen in a pipe is arranged at the gas outlet flue of the activated coke adsorption reaction system. The cooling protection system is safe, effective and reliable, is good in operation and is easy to operate and implement;due to gas cooling protection measures, the speed that heat is carried away by gases is increased, the amount of protection gases is reduced, normal operation of the system can be recovered as soon as possible, the operation cost can be reduced, and the idle rate of the system is reduced; and the system does not need to be stopped to inhibit combustion, a caking phenomenon can be avoided, and theworking efficiency of the system can be ensured.

The invention discloses a crossed cylindrical roller guide rail for an instrument lathe, which comprises a lathe body, a cross support plate and an upper support plate. The crossed cylindrical roller guide rail is characterized in that a cylindrical roller guide rail pair is arranged between the lathe body and the cross support plate as well as between the cross support plate and the upper support plate; the cylindrical roller guide rail pair comprises two guide rails provided with V-shaped raceways; cylindrical rollers are arranged in the V-shaped raceways and are provided with retainers; and adjacent cylindrical rollers provided with the retainers are arrayed in the V-shaped raceways at an angle of 90 degrees in a crossed way. The scheme has the benefits of small cylindrical rolling friction resistance, particularly small starting friction force, favorable following performance, favorable operation stability, small elastic deformation, more effective motion bodies, little abrasion and long service life; the adjacent cylindrical rollers (alternative) are arrayed in the V-shaped raceways in the crossed way and are mutually staggered at the angle of 90 degrees; the cylindrical rollers can bear loads in each direction; the sliding clearance between the guide rails is eliminated; and the contacted area of the cylindrical rollers is large.

The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner under a heating mode. The control method of the air conditioner under the heating mode aims to solve the problems that existing control methods of air conditioners have poor universality and bad user experience. In order to realize the purposes, the control method comprises thesteps that the outdoor environment temperature and the outdoor environment humidity are obtained; when the outdoor environment temperature is smaller than or equal to a temperature threshold, the preheating time of an electric heater is calculated according to a first fitting formula; the advanced starting time of an external fan is calculated according to a second fitting formula; the frequencyraising speed of a compressor at a frequency raising stage is calculated according to a third fitting formula; the electric heater and the external fan are controlled to operate; and when the startingtime of the electric heater reaches the preheating time and the operation time of the external fan reaches the advanced starting time, the compressor is controlled to conduct frequency raising according to the frequency raising speed. In this control mode, the control method of the air conditioner under the heating mode can be used for improving the universality of the air conditioner and the useexperience of users.