45results about How to "Increased stability and longevity" patented technology

The invention discloses a coating strip of a cavity surface of a semiconductor laser and a preparation method of the coating strip. The coating strip is used for separating two laser bars when the laser bars are coated. The coating strip is a strip with a convex cross section, and the width of the coating strip is shorter than the width of the laser bars. When the cavity surfaces of the laser bars are coated, the coating strip and the laser bars are arranged at intervals, and the adjacent semiconductor laser bars can be prevented from sticking together. While a 'shadow' effect is avoided, the stability of the laser is increased, and the service life of the laser is prolonged.

The invention belongs to material mixing equipment, and discloses a spherical surface mixing machine. The spherical surface mixing machine comprises a rack, a first driving mechanism, a rotary support, a mixing drum and a second driving mechanism. The first driving mechanism is arranged on the rack, one end of the rotary support is rotationally arranged on the rack through a rotating shaft, the other end of the rotary support is fixedly connected with an output shaft of the first driving mechanism, and thus the first driving mechanism drives the rotary support to rotate. The second driving mechanism is arranged on the rotary support, and an output shaft of the second driving mechanism drives the mixing drum to rotate in the rotary support. By rotating the mixing drum through the two shafts in two directions, the mixing drum can rotate in one direction and also can rotate in the other direction in the mixing process, and a material overturning function is achieved on the basis of an existing common mixing function; besides, multi-angle rotating and overturning is achieved, the effect of synchronous mixing and overturning can be achieved, and mixing efficiency is high; the charging coefficient can reach 85%-95%.

The invention discloses an electric swing flap automobile air outlet which comprises a front blade mechanism, a front air opening shell, a rear blade mechanism, a rear air opening shell, a front bladetransmission mechanism and a rear blade transmission mechanism. The rear blade mechanism is arranged in the rear air opening shell, and the rear blade transmission mechanism drives a rear blade set in the rear blade mechanism to automatically swing. Automatic swing flap of front blades and rear blades is controlled through a switch, a motor and blade rotation are combined, after the switch is turned on, the front blades and the rear blades can be driven by the motor to automatically rotate, and an air blowing effect of a large-area and wide-angle swing flap function is achieved. The technicalproblem that automatic swing flap of a traditional automobile air outlet cannot be achieved is solved.

The invention discloses a high-reliability application printed circuit board assembly QFN assembling and welding pretreatment method. The method comprises the following steps that 1) a carrying plateis manufactured; 2), a mesh plate is manufactured, at least one through hole corresponding to a QFN chip bonding pad is formed in the mesh plate, and the through holes form a through hole array; 3) dehumidification treatment is carried out on a QFN chip; 4), the mesh plate and the carrying plate are cleaned; 5) the mesh plate is placed on the carrying plate, and a soldering paste containing a soldering flux is printed on the carrying plate through the through hole array; 6) the QFN chip is pasted on the carrying plate with the soldering paste by a chip mounter; 7) hot air reflow soldering processing is performed on the carrying plate pasted with the QFN chip; and 8) the carrying plate pasted with the QFN chip is immersed into a cleaning agent so as to dissolve the soldering flux residue, and the QFN chip is separated from the carrying plate to complete the pre-tin coating. According to the method, the weldability of the QFN chip bonding pad is better through the pre-tin coating treatment, the welding qualification rate and reliability of the QFN chip can be improved, the stability and the service life of the printed circuit board assembly with high reliability are improved, and themaintenance cost of the system is reduced.

The invention relates to a fuel cell system and a standby control method thereof. The fuel cell system comprises a fuel cell stack, an air compressor, a shunt device, a back pressure valve, a hydrogensupply and return assembly, a water diversion and hydrogen discharge assembly and a boost DC/DC converter; the fuel cell stack comprises an anode chamber and a cathode chamber, the fuel cell stack isconnected with the boost DC/DC converter, an outlet of the air compressor is in fluid connection with an inlet of the cathode chamber and an outlet of the back pressure valve, and an inlet of the back pressure valve is connected with an outlet of the cathode chamber; the anode chamber inlet and the anode chamber outlet of the fuel cell stack are respectively connected with the hydrogen supply andreturn assembly and the water diversion and hydrogen discharge assembly, and a hydrogen discharge outlet of the water diversion and hydrogen discharge assembly is connected with an inlet of the hydrogen supply and return assembly. The standby control method solves the problems that the normal shutdown process is long in elapsed time and the service life of the fuel cell stack is influenced.

The invention discloses a process for manufacturing an improved pulp net. The process includes steps of thread purchasing, thread inspection, warping, drafting, net weaving, net inspection, primary setting, net cutting, splicing, secondary setting, finished product inspection, packaging, warehousing and the like. The process has the advantages that owing to scientific and reasonable thread diameters and densities of warps and wefts and the process for weaving and manufacturing the improved pulp net by the aid of proper tension, a net of the improved pulp net is compact and stable in structure, meshes of the improved pulp net are regular and uniform, the improved pulp net is not easy to deform, excellent dehydration is guaranteed, and the process is applicable to low-speed pulp machine for manufacturing heavy-weight pulp boards.

The invention relates to a motor synchronous control system of a sponge cutting machine, which comprises two servo motors and a servo motor synchronous control card with a program chip, outputs of the servo motor synchronous control card are drive outputs of the two servo motors and a computer interface, and inputs thereof are loading inputs of the two servo motors, a motor rotating speed input and a motor rotating speed instruction input. The servo motor synchronous control card comprises the steps for controlling the motor synchronization: a. detecting and analyzing the rotating speed of the servo motors; b. detecting the load data of the two servo motors; c. analyzing load data errors of the two servo motors; d. adjusting phases of the two servo motors; and e. adjusting phases of the two servo motors according to the load data errors obtained in the step d, so as to keep the load data errors of the servo motors in the normal range. The motor synchronous control system of the sponge cutting machine has advantages of stable and reliable running, high degree of integration, low price, and being favorable for further improving the motor synchronous operation performance of the sponge cutting machine.

The invention provides a temperature control device for improving lithium battery use performance. The temperature control device comprises a power battery pack, a battery management system, a power circulating system, a temperature measurement system, a charge control system, and further comprises a temperature control system and a heating module, wherein the temperature control system is respectively connected with the temperature measurement system, the power circulating system and the heating module; the heating module is respectively connected with the charge control system and the power circulating system. The temperature control device provided by the invention effectively utilizes synergistic effect of the heating module, the power circulating system and the temperature control system, thereby easily guaranteeing that the lithium battery is located in an appropriate working temperature range; the stability and the service life of the lithium battery are improved; and meanwhile, the cost of the temperature control device is lowered, and the operability in the actual application is improved.

The invention provides a metro coin for radio frequency identification. The metro coin comprises a radio frequency chip, a PCB substrate and radio frequency antenna coils arranged on the PCB substrate. The metro coin further comprises an impedance matching capacitor formed by upper and lower two parallel polar plates. The radio frequency antenna coils are arranged at the two sides of the metro coin and are in electrical connection through via holes; the radio frequency chip is arranged on the same surface with the upper parallel polar plate; and the radio frequency chip has two pins, one pin being connected with the upper parallel polar plate, and the other pin being connected with the lower two parallel polar plate through the via holes.

The invention discloses a machining method of a rubber composite gasket provided with a metallic framework and a forming mould and belongs to the field of rubber product machining. The machining method of the rubber composite gasket provided with the metallic framework comprises the steps that before the metallic framework is placed in a mould cavity, a layer of first adhesive is painted on the surface of the metallic framework first and dried, and then a layer of second adhesive is painted on a first adhesive coating and dried; the first adhesive coating is bonded to the metallic framework mutually, a second adhesive coating is bonded to rubber, the first adhesive coating and the second adhesive coating adhere to each other mutually, accordingly, the bonding strength between the metallicframework and the rubber is improved, therefore, the stability of the composite gasket in the using process is improved, and the service life of the composite gasket in the using process is prolonged.The forming mould provided by the invention is used for machining and preparing the composite gasket, mould cores are moved simultaneously after machining, composite gaskets in multiple mould cavities are ejected out simultaneously, and accordingly, the composite gaskets are convenient to demould.

The present invention provides a lens group hoisting leveling device capable of two-degree-of-freedom adjustment, belonging to the technical field of optical integration assembly. In order to eliminate the possible risk of quality accident due to stable control when an operator adjusts the thick and heavy lens group during the lens group cascade process, two-degree-of-freedom adjustment components are arranged above a hoisting plate, the hoisted lens group is connected with the lower part of the hoisting plate through a drawing bar component of a hoisting device, and two digital display level gauge components are perpendicular mutually and are arranged on two ends of the upper part of the hoisting plate separately. An oilless copper alloy gasket of the two -degree-of-freedom adjustment components tightly tightly connects the hoisting plate. The lower end face of a sliding block and the upper end face of a base plate contact with the oilless copper alloy gasket. A hoisting ring is arranged on the upper end of a connecting shaft. A pair of adjustment blocks are symmetrically arranged on two orthogonal directions of the sliding block, and the adjustment blocks connect the hoisting plate. An adjustment screw connects the middle part of the adjustment block, and the top of the adjustment screw is tightly pressed against the sliding block. The leveling of the hoisted lens group is realized by the turn of the adjustment screw.

The invention discloses a continuous annealing furnace high-temperature furnace roller ZrB2 modified CoCrAlTaY-Y2O3 protective coating and a preparation method thereof. The protective coating is arranged as a double-layer structure of a bonding layer and a cermet working layer on a substrate, the component of the bonding layer is NiCrAlY or NiCoCrAlY, and the cermet working layer is CoCrAlTaY-Y2O3-ZrB2; the metal ceramic working layer comprises the following components of, in percentage by mass, 50%-63% of CoCrAlTaY, 21%-30% of Y2O3, and 16%-20% of ZrB2; and the bonding phase and the anti-oxidation phase CoCrAltaY comprises the the following elements of, in percentage by weight, 50%-69.5% of CO, 20%-30% of Cr, 7%-10% of Al, 3%-9% of Ta and 0.5%-1% of Y. The continuous annealing furnace high-temperature furnace roller ZrB2 modified CoCrAlTaY-Y2O3 protective coating does not generate Mn1.5Cr1.5O3 or MnAl2O4 nodulation materials in the high-temperature use process, the protective coatingand the preparation method thereof have anti-nodulation performance, the stability and service life of the protective coating is improved, and meanwhile, the protective coating has good high-temperature friction wear resistance.

The invention discloses a durable static main shaft. The durable static main shaft comprises a main shaft core; transmission rods are fixedly connected to the left and right ends of the main shaft core; a thrust shaft collar is fixedly connected to the external surface of the main shaft core; two first radial oil return grooves are formed in the external surface of the thrust shaft collar; a shaftbushing sleeves the external surface of the main shaft core; one group of first radial oil return cavities is formed in the internal wall of the shaft bushing; the two first radial oil return cavities communicate with two radial oil return grooves; and a main shaft sleeve sleeves the external surface of the shaft bushing. According to the durable static main shaft, the design structure is reasonable; through adoption of a designed heating pipe, high pressure oil entering into a bearing is preheated so that the wear can be reduced, and energy loss can be prevented from being increased due to over-high resistance when the bearing is just started; through adoption of a designed constant pressure valve, oil pressure can be stably supplied to improve the stability of the bearing; and through adoption of a designed filter element, impurities contained in the supplied oil are filtered so that the stability of the bearing is improved and the service life of the bearing is prolonged.

The invention discloses a high-temperature-resistant high-reflective insulation light shield for a solar vacuum heat collecting tube which belongs to the technical field of photo-thermal utilization of solar energy. The high-temperature-resistant high-reflective insulation light shield for the solar vacuum heat collecting tube is fixed to the heat collecting tube through a metal fastener. The high-temperature-resistant high-reflective insulation light shield for the solar vacuum heat collecting tube comprises a ceramic substrate, an insulating inner layer and a high-reflective outer layer, wherein the insulating inner layer is attached to the inner side of the ceramic substrate, and the high-reflective outer layer is attached to the outer side of the ceramic substrate. The light shield canbe oxidized under the circumstance of being radiated by high concentration ratio sunlight and reflects sunlight at the same time, and meanwhile, the light shield can be insulative. As heat accumulated by long-term radiation of the high concentration ratio sunlight reaches the sealing position of protecting the heat collecting tube and a corrugated pipe acts, under a high concentration ratio usingcondition, the reliability of the heat collecting tube u is increased and the service life of the heat collecting tube is prolonged.

The invention relates to a lifting device, in particular for large lifting heights. It has a basic frame, a lifting frame and a driving device. The driving device includes a first hydraulic drive unit and a second hydraulic drive unit arranged symmetrically on the left and right, and several table sensors, which are used to detect whether a certain side of the lifting frame reaches the target. table top; a third hydraulic drive unit is arranged between the lifting frame and the basic frame, and the hydraulic cylinder of the first or second hydraulic drive unit is coaxial or collinear with the hydraulic cylinder of the third hydraulic drive unit; the first The first, second and third hydraulic drive units have the same performance and size. Since the third hydraulic drive unit can perform interchangeable coaxial automatic fine-tuning on the lifting frame when the lifting frame is tilted, the lifting frame can be automatically leveled during multiple round trips without tilting, effectively improving the stability of the lifting frame performance, reliability and applicability.

The invention discloses a coupled oscillatory circuit for vehicle detection. The coupled oscillatory circuit includes a resistor R1, resistors from R2 to R6, a coupling transformer T1, a loop coil L, a comparator A, diodes of D1 and D2, a transient voltage suppressor D and two power source lightning protectors; the loop coil L is connected between an a end and a b end of the coupling transformer T1; the transient voltage suppressor D is connected in parallel at two ends of the loop coil L; the diode D1 and the diode D2 are sequentially connected in series between a c end and a d end of the coupling transformer T1, wherein the diode D1 and the diode D2 are in reverse connection with each other; the c end of the coupling transformer T1 is also connected with the resistor R4 and the collector of a triode T simultaneously; the base of the triode T is connected with the resistor R1 and a power source VCC sequentially; and the emitter of the triode T is connected with the resistor R3, the power source lightning protectors and the power source VCC sequentially. With the above coupled oscillatory circuit adopted, damage which is caused by intrusion of lightning and other internal voltage can be avoided, and the transformer can be prevented from being damaged by transient high voltage, and therefore, the stability of a vehicle detector can be improved, and the service life of the vehicle detector can be prolonged.

An overtemperature protection laser cosmetic instrument control system comprises a YAG laser driving power supply, a voltage preburning module, a laser generator, a liquid crystal display, a central processor, a water flow sensing device and a temperature sensing device. The central processor is connected with the liquid crystal display, the YAG laser driving power supply, the water flow sensing device and the temperature sensing device. The YAG laser driving power supply is connected with the voltage preburning module. The voltage preburning module is connected with the laser generator. The water flow sensing device is arranged in a heat exchanger. The heat exchanger covers the laser generator. The temperature sensing device is arranged on the laser generator. The laser generator works stably and does full preparation of voltage and capacitance before light radiation, so that the service life and the stability of equipment are greatly prolonged and improved respectively. The laser generator can be easily burned in a condition without water circulation, and the water flow sensing device automatically protects the laser generator in the condition that the heat exchanger has no water circulation, so that the laser generator is prevented from being damaged, and equipment is enabled to normally work in hot summer for a long period.

The invention belongs to the technical field of catalysts, and particularly relates to a composite metal oxide catalyst for one-step preparation of isobutyl isobutyrate from isobutyraldehyde, and a preparation method of the composite metal oxide catalyst. According to the invention, carbon black is used as an inert matrix, a nanometer CuO-MxOy (wherein M is Ce, Cr or Ti) carrier with a mesoporousstructure is synthesized by combining a space synthesis method with a hydrothermal microwave method, and then aluminum isobutoxide is loaded on the surface of the carrier by utilizing a supercriticalfluid impregnation method to prepare the catalyst. The preparation method is simple; the catalyst has a good structure and a good surface distribution state; a mesoporous structure significantly improves the stability of the catalyst and prolongs the service life of the catalyst, so the catalyst has a higher specific surface area and can be used in a reaction for preparing isobutyl isobutyrate from isobutyraldehyde in one step; and the reaction activity of the catalyst and the selectivity of isobutyl isobutyrate are obviously improved.

The invention discloses a fishpond oxygen detecting and aeration system and belongs to the technical field of aquacultural machinery. The fishpond oxygen detecting and aeration system comprises a crossed support, the middle of the crossed support is provided with a crossed support fixing ring, and the lower end of the crossed support fixing ring is provided with a balance weight; the middle of thecrossed support is provided with a crossed support release valve; the lower end of the outside of the crossed support is provided with a release balloon, an oxygen detector I is arranged inside the release balloon, and a release hole I is formed in the surface of the release balloon; the crossed part of the crossed support is provided with a vertical rod, the middle of the vertical rod is provided with a vertical rod release valve, and the lower end of the vertical rod release valve is provided with a release block; an oxygen detector II is arranged inside the release block, and a release hole II is formed in the surface of the release block; the bottom end of the vertical rod is connected with a fixing anchor. The fishpond oxygen detecting and aeration system is stable in structure, reasonable in design and capable of effectively solving the problem of deficiency of aerating range and depth, increasing the fishery yield, reducing the labor intensity and achieving automation, therebybeing applicable to extensive generalization.

The invention belongs to the technical field of greenhouses, and particularly relates to an agricultural science and technology planting greenhouse. The greenhouse comprises a greenhouse frame. Plastic films are symmetrically laid at the top of the greenhouse frame; a rack is arranged at one end of the greenhouse frame; sliding rods are installed at the two ends of the greenhouse frame respectively; sliding sleeves are slidably connected with the side faces of the sliding rods respectively; motors are installed on the two sliding sleeves close to the rack respectively; the ends of the motors are connected with gears matched with the rack through rotating shafts; the free ends of the rotating shafts are connected with rotating rods; the other ends of the rotating rods are rotatably connected with the sliding sleeves away from the rack; and the bottom ends of the side walls of the rotating rods are connected with the top ends of the plastic films. According to the agricultural science and technology planting greenhouse, by arranging a structure capable of automatically winding the plastic films at the top of the greenhouse, artificial damage generated in the opening and closing process of the plastic films is reduced, convenience and rapidness are achieved, meanwhile, the stability of the greenhouse in the using process is improved, the service life of the greenhouse in the usingprocess is prolonged, and meanwhile the greenhouse is more intelligent in the using process due to the arrangement of a temperature sensor.

The invention relates to refrigeration equipment capable of automatically dissipating heat. The refrigeration equipment comprises a main body, a heat dissipation mechanism and a trigger mechanism. According to the refrigeration equipment, the temperature in a box is sensed via the trigger mechanism, power is supplied to the heat dissipation mechanism, and heat of the main body is dissipated through the heat dissipation mechanism. Compared with an existing trigger mechanism, the trigger mechanism avoids use of electronic elements such as a temperature sensor through a pure mechanical structure, the stability of the device is improved, the service life of the device is prolonged, a motor stops supplying power only when the temperature is reduced to a certain degree, sudden running or stopping of the motor due to unstable connection of a first electric sheet and a second electric sheet when the temperature floats is avoided, and the service life of the motor is prolonged. Compared with an existing heat dissipation mechanism, through linkage of an air cooling assembly and a sealing assembly, it is guaranteed that heat can be stably discharged through heat dissipation holes, meanwhile, when the air cooling assembly stops running, the heat dissipation holes are kept in a sealed state, dust is prevented from blocking the heat dissipation holes, and the service life of the main body is prolonged.

The present invention provides a hydraulic spring operating mechanism which cooperates with a pressure tester and comprises a working cylinder with oil and a piston rod, wherein the working cylinder is provided with an opening pressure test channel and a closing pressure test channel; a first pressure sensor used for acquiring dynamic oil pressure intensity in the working cylinder in real time during opening of the mechanism is embedded in the opening pressure test channel, one end of the first pressure sensor with a probe is arranged in the oil of the working cylinder, the other end of the first pressure sensor is connected with the pressure tester through a lead; a second pressure sensor used for acquiring dynamic oil pressure intensity in the working cylinder in real time during closing of the mechanism is embedded in the closing pressure test channel, one end of the second pressure sensor with a probe is arranged in the oil of the working cylinder, the other end of the second pressure sensor is connected with the pressure tester through a lead. Through adoption of the hydraulic spring operating mechanism of the present invention, dynamic oil pressure intensity in a working area during opening and closing processes can be actually measured, then optimization and improvement is further performed, thereby achieving the purpose of improving stability and service life of the hydraulic spring operating mechanism.

The invention relates to a multi-folding umbrella rib. The multi-folding umbrella rib comprises a first rib (1), a second rib (2), a third rib (3) and a pull wire (4) which are connected sequentially from the inside to the outside; the second rib (2) is provided with a lug boss (5) with a through hole (51) through which the pull wire (4) passes; the lug boss (5) comprises a basal part (52), a first extension part (53), a second extension part (54) and a connecting part (55), the first extension part (53) and the second extension part (54) upwardly extend from the basal part (52), and the connecting part (55) is connected with the first extension part (53) and the second extension part (54); the first extension part (53) and the second extension part (54) are staggered longitudinally and respectively arranged at the left side and right side of the basal part (52). The injection molding of the multi-folding umbrella rib disclosed by the invention is highly convenient and efficient, man hours are saved, moreover, the phenomenon that a fabric is injured by the end of the pull wire cannot take place, and in the process of using the rib, the rib joint cannot easily shift as well.

The invention relates to a preparation method of an acetylene method vinyl acetate catalyst and mainly solves the problems of poor stability and short service life of a catalyst in the prior art. Thepreparation method of the acetylene method vinyl acetate catalyst comprises the following steps of: (1) carrying out heat treatment on activated carbon AC in an oxygen-containing substance atmosphereto obtain AC1; (2) treating the AC1 with an ionic liquid to obtain AC2; and (3) loading a catalyst active component by an impregnation method, the active component comprising zinc acetate. With the method provided by the technical schemes of the invention adopted, the problem is better solved; and the method can be used for industrial production of acetylene method vinyl acetate.

The invention discloses a nano-aperture metal filter element and a preparation method thereof. The nano-aperture metal filter element comprises a filter material, an end cover located at the opening end of the filter material and a chuck, a convex positioning part is formed at the end of the filter material, the end cover and the chuck are located on the two sides of the positioning part respectively, and the positioning part is fixed between the end cover and the chuck. A sealing component is arranged between the end cover and the positioning part. During preparation, the filter material, the end cover, the chuck, the sealing component and other auxiliary materials can be separately processed without welding, so that a user can select different components for combined use according to use requirements, and can independently replace and use a component after the part of the components are damaged without completely replacing the components, the use cost of the filter element is reduced, and meanwhile, the filter element also has extremely high sealing performance and an extremely good use effect.

The invention relates to a ceramic tile cutting device with a good effect. The ceramic tile cutting device with the good effect comprises a support, a cutting mechanism and a clamping mechanism, wherein the cutting mechanism and the clamping mechanism are both arranged on the support, the cutting mechanism comprises a driving assembly, a positioning assembly and a cutting assembly, the clamping mechanism comprises a clamping assembly and a linkage assembly, a moving assembly is arranged on a moving rod, and a pulling unit is arranged on a pulling plate. According to the ceramic tile cutting device with the good effect, clamping of workpieces is achieved through the clamping mechanism, cutting of the workpieces is achieved through the cutting mechanism, online clamping of the workpieces is achieved through linkage of the cutting mechanism and the clamping mechanism, and a pure mechanical structure is adopted for linkage, so that the stability of the device is improved, and the service life of the device is prolonged; and according to the cutting mechanism, rotation and movement of a cutting disc are achieved through one output end, energy is saved, meanwhile, constant-speed movement of the cutting disc is kept, the cutting effect is improved, movement of the cutting disc is positioned, precise cutting is achieved, and flexible clamping is adopted by the clamping mechanism, so that the workpieces are protected.

The invention relates to a preparation method of a monolithic polysulfone bipolar membrane with a side group bonded with a phthalocyanine catalytic group. The preparation method comprises the following steps: taking a bromomethylated polysulfone polymer as a starting raw material, respectively synthesizing an epoxy group-containing substituent polysulfone polymer and a polysulfone side group bonded phthalocyanine polymer, mixing the epoxy group-containing substituent polysulfone polymer and the polysulfone side group bonded phthalocyanine polymer, casting on a clean glass plate, and drying toprepare a polysulfone-based membrane containing a phthalocyanine group side group and an epoxy group side group; and sulfonating, aminating and quaternizing the base membrane, and washing with deionized water to obtain the monolithic phthalocyanine group-containing polysulfone bipolar membrane. According to the bipolar membrane prepared by the method, an epoxy group is introduced into a polysulfone side group through nucleophilic substitution reaction, and anion and cation exchange membranes are introduced into a polysulfone molecular chain so that a membrane forming process is omitted, and the use of carcinogen chloromethyl ether is avoided. The prepared bipolar membrane has a self-catalysis effect, and is low in resistance and low in transmembrane voltage. And after long-term use, the problems of bubbling, cracking and the like of the middle interface layer, which are easily caused in the use process of the composite bipolar membrane, can be avoided.

The invention relates to a screen printing device for a tubular workpiece. The screen printing device comprises a base, a driving mechanism, a liquid injection mechanism and a limiting clamping mechanism. According to the screen printing device for the tubular workpiece, reciprocating motion of a moving rod is achieved through the driving mechanism, the liquid injection mechanism is driven by the moving rod to inject printing ink on a screen plate, and the workpiece is clamped through the limiting clamping mechanism. The limiting clamping mechanism is driven by the moving rod to move, and therefore screen printing is conducted on the outer wall of the workpiece. Compared with an existing screen printing device, online supplement of the printing ink and online screen printing of the workpiece are achieved through linkage of the driving mechanism, the liquid injection mechanism and the limiting clamping mechanism, and a pure mechanical structure is adopted for the linkage. Stability of the device is improved, and the service life of the device is prolonged. Compared with an existing liquid injection mechanism, the printing ink is evenly rolled through a roller, the screen printing effect is improved, flexible pressure is adopted, the service life of the screen plate is prolonged, and compared with an existing clamping mechanism, flexible clamping is adopted for the mechanism, and the workpieces is protected.

The invention is applicable to the technical field of computers, and provides a flash memory chip analysis method and device, electronic equipment and a storage medium. The method comprises the following steps: performing a data retention capability test on a flash memory chip through a BCH code; baking the storage chip in different states, and testing the data retention capability of physical storage blocks with different erasure times in the flash memory chip through the BCH code; and recording and analyzing test results of the flash memory chip at a plurality of time points to obtain characteristics of the flash memory chip. According to the method provided by the invention, the problems of unstable use and short service life of the existing flash memory core in different test scenes and platforms are solved.

The invention discloses a method for reducing residual austenite in high-alloy steel. The method comprises the steps of electromagnetic field treatment and liquid nitrogen heat-preservation treatment,wherein under the normal temperature, the to-be-treated high-alloy steel is placed into an electromagnetic field generated by a magnetizing device, magnetically-induced phase transition is caused according to the magnetically-induced clearance channeling mechanism, and thus the residual austenite in the high-alloy steel is converted into martensite; and the high-alloy steel subjected to electromagnetic field treatment is placed into a closed container containing liquid nitrogen to be subjected to liquid nitrogen heat-preservation treatment so as to prompt the residual austenite in the high-alloy steel subjected to electromagnetic field treatment to continue being converted into the martensite. According to the method for reducing the residual austenite in the high-alloy steel, part of themetastable residual austenite in the high-alloy steel can be prompted to be converted into the martensite, the size stability of a high-alloy steel material is improved, the service life of the high-alloy steel material is prolonged, crack starting sources are reduced, and the advantages of environmental friendliness, energy conservation, convenient and rapid operation and high timeliness are achieved.