709 results about "Continuous use" patented technology

The invention discloses a bridge sensor self-optimization arrangement and state evaluation method based on a modal confidence criterion, and relates to the technical field of big data analysis and processing. The method comprises the following steps: step 1, acquiring a vertical acceleration time sequence at candidate installation coordinates of each sensor through preset vehicle excitation; 2, a physical information neural network is adopted to drive sparse damage reconstruction and sensor importance joint optimization algorithm to determine a bridge sensor self-optimization arrangement result; and step 3, installing a vertical acceleration sensor on the target bridge according to a bridge sensor self-optimization arrangement result, dividing bridge state grades according to a finite element unit damage estimation result, and outputting a bridge state evaluation result. The method can be continuously used in the bridge operation period, quantitative and traceable structure state evaluation results are provided, potential risks can be found in advance, and the reliability, practicability and intelligent level of bridge health monitoring are remarkably improved.

The invention discloses an indoor air filter, and relates to the technical field of air treatment, the indoor air filter comprises a machine body and an air duct, and further comprises a first partition plate, the top of the first partition plate is provided with a rotary drum, the outer wall of the rotary drum is provided with two through holes, and the through holes are internally provided with filter screens; the driving mechanism is used for driving the rotating drum to rotate; an air guide mechanism; a second partition plate; the linkage air control mechanism comprises an air cylinder mounted at the bottom of the second partition plate, a first piston mounted in the air cylinder and a lifting frame mounted at the top of the first piston; air is filtered by exchanging the two filter screens, the problem that in the prior art, the filter screens need to be cleaned after shutdown is solved, the continuous use effect of the air filter is guaranteed, the surfaces of the replaced filter screens are cleaned in a closed mode through the cleaning mechanism, and the cleaning efficiency is improved. And the directional dust removal mechanism is matched to timely and directionally guide out the cleaned dust impurities, so that the problem that the dust impurities are easily attached to the surface of the filter screen again and are difficult to clean thoroughly when the filter screen is cleaned is solved.

The invention discloses an underground data reliable transmission method and system based on multipath redundancy, and relates to the technical field of drilling operation well control monitoring, and the method comprises the steps: building a channel state real-time monitoring and reliability evaluation mechanism for a plurality of communication channels from underground to ground, and taking an evaluation result as a drive, performing erasure redundancy coding and adaptive fragment distribution on a to-be-transmitted data packet to enable a channel with higher reliability to bear more coding fragments; parallel uplink transmission of the fragments is achieved through multi-channel scheduling, and the ground end carries out decoding reconstruction based on the arriving fragments to recover complete monitoring data. Therefore, when the channel is degraded or partially loses efficacy, the data can still be continuously available, so that the certainty and the real-time performance of underground monitoring data transmission are improved.

The invention discloses a graphite crucible silicon infiltration resistant coating based on a gradient boron nitride-silicon carbide composite structure and a preparation method thereof. The coating is composed of hexagonal boron nitride nanosheets, beta-type silicon carbide nanowires, yttrium aluminum garnet precursor sol and the like, and effective blocking of 1500-1600 DEG C silicon melt is achieved through gradient structural design and an in-situ self-repairing mechanism. The preparation process comprises the steps of h-BN activation, S C carbon layer deposition, slurry mixing and spraying and segmented heat treatment. The molten silicon contact angle of the coating reaches 158 + / -2 degrees at the temperature of 1550 DEG C, through cracks do not exist after 50 times of thermal shock circulation, the coating is effective after being continuously used for 48 batches under the industrial working condition, the problems of silicon infiltration interface adhesion and thermal shock failure of a traditional graphite crucible are solved, and the coating has remarkable industrial application value.

The invention discloses a high-voltage discharge circuit suitable for a storage battery power supply and an electric flame stove. The high-voltage discharge circuit comprises an inversion driving module, a boosting transformer T1, at least three groups of active bridge rectifier modules and discharge modules corresponding to the active bridge rectifier modules. Through combination of driving of the active bridge rectifier module, voltage / current double-closed-loop feedback and real-time PWM signal output control of the control chip U1, current difference of each discharge branch is eliminated, the problem of uneven branch current is solved, and ring current and reactive power loss between branches are eliminated; a diode in a voltage doubling rectifying circuit and a bleeder resistor of a resonance circuit in the prior art are abandoned, an active bridge type rectifying module is adopted for driving, a PWM signal is dynamically adjusted through the low ESR characteristic of a capacitor C1 and closed-loop control, extra power loss is avoided, the working temperature of the circuit is controlled to be below 85 DEG C, and the service life of the circuit is prolonged. And the continuous service life of components in the circuit is prolonged.

The invention relates to the technical field of intelligent wearable equipment, and discloses an intelligent wearable system integrating multi-modal physiological monitoring and active intervention, which comprises a ring end acquisition module, a mobile end cache module and a cloud intelligent analysis module, and the cloud intelligent analysis module comprises a multi-modal fusion analysis unit, an active intervention decision unit and a user digital twinborn model construction unit, and is used for calculating a sleep score, a readiness score, a pressure index, a blood oxygen trend and a menstrual period prediction result according to the multi-source physiological characteristics, and executing an active intervention decision based on a health state. The sensing module is integrated in the ring body, the light-weight design is suitable for long-term wearing, all-weather data acquisition is guaranteed, compared with a bracelet or a watch, the ring is comfortable and hidden to wear, the continuous use willingness of a user is enhanced, meanwhile, the ring is suitable for high-voltage office or sports scenes, and non-inductive health monitoring is achieved.

The invention relates to the technical field of solar energy, in particular to a solar large flat plate collector with a cleaning function, which comprises a collector glass cover plate, a mounting structure is arranged outside the collector glass cover plate, and a first cleaning mechanism and a second cleaning mechanism for cleaning the collector glass cover plate are arranged on the mounting structure. The first cleaning mechanism and the second cleaning mechanism are used in cooperation. And the first cleaning mechanism comprises two rollers. According to the solar large flat plate collector with the cleaning function, the rollers are driven by external power to rotate, the wiping cloth can be easily replaced by the two rollers through the coordinated action of winding and unwinding, the whole process is easy to operate, complex disassembly and assembly steps are not needed, the time needed for replacing the wiping cloth is shortened, and the cleaning efficiency is improved. The continuous use efficiency of the equipment is improved, the wiping cloth can better play a cleaning role in the wiping process, and the cleaning effect on stains and dust on the glass cover plate is enhanced.

The invention relates to the technical field of copper wire production, and provides a hot tinning device and process for a superfine copper wire, the hot tinning device comprises a tinning box, one side of the tinning box is provided with a cooling tank communicated with the outside, the bottom and the top of the cooling tank are both provided with holes communicated with the tinning box, and the copper wire can penetrate out and penetrate in through the holes; a heating pipe is arranged at the top of the interior of the tinning box, and a guide roller assembly is arranged in the tinning box. The device overcomes the defects in the prior art and is reasonable in design and compact in structure, the copper wire is cooled after tinning, a tin layer is stabilized and then heated again, after the tin layer is close to a molten state, tin on the surface of the copper wire is scraped through the die cutter assembly, redundant tin on the surface of the copper wire is scraped off and smoothed, and the copper wire surface quality is improved. And the uniformity and the conductivity of the copper wire surface coating are improved. And a plurality of die cutter assemblies which are horizontally arranged are arranged in the tin plating box, so that the die cutter assemblies are prevented from being overheated due to long-time continuous use, a copper wire tin plating layer is prevented from being molten accidentally, and the service life of the die cutter assemblies is prolonged.

The disclosure relates to an electronic device including a flexible display, an operation method, and a storage medium. According to an embodiment, an electronic device may control the display module to display a first task bar and respective screens of a plurality of running applications on the first display in an unfolded state of the housing. According to an embodiment, the electronic device may generate at least one icon related to the plurality of applications for continuous use of the plurality of screens based on a partial area of the housing being in a folded state. According to an embodiment, the electronic device may control the display module to display at least one screen among the plurality of screens and a second task bar including at least one icon on the second display in the folded state. Other embodiments are possible. Other embodiments are also possible.

The invention belongs to the technical field of water-based ink, and provides high-temperature-resistant water-based ink for laminated iron and a preparation method thereof.According to the high-temperature-resistant water-based ink for laminated iron and the preparation method of the high-temperature-resistant water-based ink for laminated iron, the design of a double-resin system formed by compounding waterborne polyurethane resin and flexible segment copolymer modified ternary vinyl chloride-vinyl acetate resin is adopted, and the synergistic effect of surface modified nanometer aluminum oxide reinforcing filler and an elastomer modifier is combined; the interface compatibility is improved through a siloxane coupling agent surface treatment technology, a composite coating structure with balanced flexibility and heat resistance is formed, the high temperature resistance can reach 200 DEG C or above, continuous use is free of failure, the flexibility is free of cracking through a T-bend test, the adhesion of a coating film reaches the 0-level standard, the drying time is shortened to be within 30 minutes, and the service life of the coating film is prolonged. The comprehensive performance index that the storage stable period is prolonged to 12 months or above is achieved, the technical problems that an existing laminated iron coating is insufficient in flexibility and poor in thermal stability in a high-temperature environment are solved, and the high-temperature-resistant laminated iron coating has wide food packaging and industrial protection application value.

The invention provides a formula of sleep-aiding essential oil containing cedar himalaya, relates to the technical field of sleep-aiding essential oil, and aims to solve the problems of single effect, poor stability and insufficient skin tolerance of existing sleep-aiding essential oil. The formula comprises the following components in parts by weight: 0.5-5 parts of Himalaya cedar essential oil, 80-95 parts of base oil, 1-10 parts of synergistic sleep-aiding essential oil, at least one of lavender essential oil, chamomile essential oil and sandalwood essential oil, and 0.1-1 part of optional antioxidant. During preparation, the components are ensured to be uniform through a process of stirring at a constant temperature of 25-35 DEG C and mixing at a rotating speed of 200-300rpm, the pH value of the product is 5.5-7.0, the retention rate of the active components is greater than or equal to 90% after the product is stored in a dark place at 25 DEG C for 6 months, and the use mode is that the product is smeared on wrists / necks / soles 1-2 hours before sleep, and 0.5-2mL of the product is smeared on each time. Tests show that the sleep time of insomnia people can be shortened to 15-22 min after the essential oil is continuously used for 28 days, the PSQI score is reduced by 40%-54%, the skin irritation is zero, the essential oil is suitable for preparing external sleep-aiding essential oil cream, ball bottles and other products, and a safe and efficient solution is provided for sleep disorder people.

The invention discloses a flexible shaft inner pipe flocking process and a flexible shaft, the flexible shaft inner pipe flocking process comprises a flexible shaft sleeve, the end portion of the flexible shaft sleeve is fixedly connected with a connecting piece, the connecting piece is detachably connected with a fixing mechanism, the fixing mechanism comprises a fixing sleeve, and the fixing sleeve is detachably connected to the end, away from the flexible shaft sleeve, of the connecting piece; the positioning head is fixedly connected to one end, far away from the connecting piece, of the fixing sleeve; and the fastening bolt is in threaded connection with the fixing sleeve. According to the flexible shaft inner pipe flocking process and the flexible shaft, the flocking adhesive is coated on the outer surface of the flexible shaft main body, and the flexible shaft main body is heated, so that when the flexible shaft main body is fixed with the flocking thread subsequently, the flocking thread cannot be excessively melted and damaged due to the effect of the flocking adhesive, and the flocking quality of the flocking thread is improved. The flocked thread can be fixed to the outer surface of the flexible shaft body, meanwhile, the worn flocked thread can be rapidly replaced through the fixing mechanism, operation is convenient, and follow-up continuous use of the flexible shaft is guaranteed.

The invention belongs to the technical field of hardware casting forming equipment, and particularly relates to metal hardware casting forming equipment which comprises a disc, a plurality of molds are fixedly connected to the edge of the disc, a first circular ring is slidably arranged in the middle of each mold, a cylindrical block is arranged in the middle of each first circular ring, and a cross block is fixedly connected to the lower end of each cylindrical block. The four corners of the cross block are fixedly connected with the disc through first rectangular blocks, the middle of the cross block and the middle of the cylindrical block are of hollow structures and communicate with each other, the middle of the mold is of a hollow structure, one side of the mold and one side of the cross block are each fixedly connected with a first round pipe, and a water changing assembly is arranged on one side of the upper end of the bottom plate. And the water changing assembly comprises two second round pipes arranged at the upper end of the bottom plate in a sliding mode, the ends, away from the disc, of the second round pipes are fixedly connected with third round pipes correspondingly, and the problems that the mold cannot be rapidly cooled, and cooling is slow during subsequent continuous hardware casting due to continuous use of the mold are solved.

The utility model provides a liquid supplementing device and ALD equipment, and the liquid supplementing device comprises a liquid storage tank which is used for storing liquid; the liquid measuring part is arranged in the liquid storage tank and is used for detecting the liquid to obtain a detection result; the input pipeline is connected to the liquid storage tank; the liquid supplementing pipeline is connected to the liquid storage tank, and the liquid storage tank is connected with the container through the liquid supplementing pipeline; the discharge pipeline is connected to the liquid storage tank; the liquid supplementing valve is arranged on the liquid supplementing pipeline; and the discharge valve is arranged on the discharge pipeline. Before the liquid is injected into the container of the ALD equipment, detection is carried out through the liquid supplementing device, the situation that the liquid is polluted by the outside world can be reduced, the detection process of the liquid supplementing device does not affect continuous use of the liquid in the container of the ALD equipment for production, in other words, pure water supplementing operation can be automatically carried out on the ALD equipment through the liquid supplementing device under the condition that the ALD equipment is not shut down, and the production efficiency is improved. And the automation degree and the production efficiency can be improved.

The invention relates to the related field of edible oil barrel handle production, in particular to an edible oil barrel handle stacking mechanism which comprises a first electric guide rail, a first sliding frame, a second electric guide rail, a second sliding frame, a suction cup frame, a rotating plate, a connecting mechanism, a supporting seat, a supporting plate, a positioning and folding module, a sliding mechanism, a pneumatic suction cup and the like. The front face and the back face of the rotating plate are each provided with a set of pneumatic suction cups, the two sets of pneumatic suction cups can be conveniently and alternately used, abrasion caused by continuous use of one set of pneumatic suction cups is reduced, when one set of pneumatic suction cups is used, the other set of pneumatic suction cups can serve as standby, and when one set of suction cups need to be maintained or breaks down, the other set of pneumatic suction cups can serve as standby. And the other group of suction cups can continue to work, so that the production continuity is ensured, and the working efficiency of grabbing the oil drum handle is improved.

The invention provides a game control method, and the method comprises the steps: providing a graphical user interface through a terminal device, and the graphical user interface comprises a game scene and at least partially comprises a first virtual object corresponding to the terminal device; the method comprises the following steps: in response to a first virtual object meeting a specified condition, controlling to activate a target skill; in response to a trigger operation for the target skill, controlling the first virtual object to enter a first state; responding to the first virtual object to quit the first state, and controlling to stop activating the target skill; in response to the fact that the current game state is detected to be in the specific time period state, the target skill is controlled to be activated, so that a skill activation mechanism in the game is organically combined with the special time period state, players can continuously use the skill in the specific time period without repeatedly meeting specified conditions, and the interaction experience is improved.

The invention provides a cloud instance login method and device, electronic equipment and a storage medium, and relates to the technical field of cloud computing. The cloud instance login method comprises the steps that an access credential is generated according to a login request, and the access credential comprises the access authority of a cloud storage server; acquiring historical user data from the cloud storage server according to the access credential; and loading the cloud instance in the corresponding state according to the historical user data. According to the method, the cloud instance does not need to be completely restarted or initialized after the user logs in, the operation environment can be directly recovered based on historical user data, the cold start waiting time is shortened, seamless recovery of personalized configuration, application state and operation progress is supported, the user is located at the last leaving position every time the user logs in, and the natural fluency of continuous use is improved.

The invention discloses a high-flame-retardant temperature-resistant corrosion-resistant optical fiber composite cable and a preparation method thereof, and belongs to the technical field of cable manufacturing, and the high-flame-retardant temperature-resistant corrosion-resistant optical fiber composite cable sequentially comprises an optical fiber unit, a conductor layer, an insulating layer, a shielding layer, a corrosion-resistant layer and a sheath layer from inside to outside. The optical fiber unit adopts a ceramic silicone rubber buffer layer; the conductor layer is a nickel-plated copper alloy stranded wire, and the oxidation resistance is enhanced through nano titanium dioxide sol treatment; the insulating layer is of a three-layer co-extrusion structure; the shielding layer adopts an aluminum-plastic composite belt and tinned copper wire braided composite structure; the anti-corrosion layer is a polytetrafluoroethylene film subjected to plasma treatment; the sheath layer is made of two-component ceramic silicone rubber, is flexible after being vulcanized at normal temperature, and is converted into a ceramic body at high temperature. According to the optical fiber composite cable, through the collaborative design of a multi-layer structure, the performance of excellent continuous use stability, high salt mist environment corrosion resistance and the like is achieved, the optical fiber composite cable is suitable for high-temperature, corrosion, fire and other severe environments, and the safety and durability of the composite cable are remarkably improved.

The utility model discloses an anti-blocking axial flow pump in the technical field of axial flow pumps, which comprises an axial flow pump and a wall body, and a mounting plate connected with the wall body is arranged on the outer wall of the axial flow pump; a mounting box is arranged on the outer side of the bottom of the axial flow pump, and the bottom of the axial flow pump is located in the mounting box. According to the scheme, one of the filter plates is not blocked by a baffle, impurities in water can be filtered, the impurities in the water can be pumped into the axial flow pump through the mounting box after being filtered by the axial flow pump, and then when the filter plate is blocked, electric telescopic rods on the two sides are started at the same time, so that the impurities in the water can be filtered out, and the water can be pumped into the axial flow pump through the mounting box. When the axial flow pump is used, the baffles corresponding to the blocked filter plates move to block the filter plates, impurities attached to the bottoms of the filter plates can be pushed away, the baffles corresponding to the non-blocked filter plates move and do not block the filter plates any more, it can be guaranteed that one filter plate can be normally used, blocking prevention of the axial flow pump is avoided, and continuous use of the axial flow pump is guaranteed.

The invention relates to the technical field of electronic products, in particular to a method for realizing power saving in use of a Mifi product, which comprises the following steps: acquiring user operation information and a battery electric quantity state corresponding to the Mifi product, judging whether a power saving mode needs to be started or not based on the user operation information or the battery electric quantity state, and if so, starting the power saving mode corresponding to the Mifi product; in the process of starting the power saving mode, for a network supporting NSA 5G, detecting whether the network is currently in an LTE + NR anchor cell, if so, switching the LTE + NR anchor cell to a pure LTE cell through a soft switching mechanism, and switching the network mode of the Mifi product from a 5G network to a 4G / LTE network; hard handover is carried out on a network supporting SA 5G; in the process of starting the power saving mode, the corresponding 5G WiFi frequency band is controlled to be closed, the 2.4 G WiFi frequency band is reserved, and the energy consumption of the 5G WiFi frequency band in the WiFi module is higher than that of the 2.4 G WiFi frequency band. According to the invention, electric quantity can be saved under the condition of not influencing continuous use of equipment by a user.

The invention discloses a denitration purification method for flue gas containing oxynitride, belongs to the technical field of waste gas purification, and aims to solve the technical problem that the denitration performance of the flue gas containing oxynitride and the cycle performance of an absorbing material need to be further improved in the prior art. Introducing the modified ionic liquid into a regeneration tank for regeneration, and then supplementing the modified ionic liquid to the absorption tower for continuous use; according to the invention, efficient catalytic oxidation of NO is realized by constructing a graphene oxide loaded metal oxide composite catalyst, and meanwhile, a functionalized modified ionic liquid is introduced as an absorbent to enhance selective absorption and cyclic regeneration capacity of NO2, and the catalytic oxidation and absorption processes are highly coupled in the process, so that the catalytic oxidation and absorption efficiency is improved. A'catalysis-absorption 'integrated denitration system is formed, and the flue gas denitration performance and the cycle performance of the absorption material are improved.

The forestry seedling culture container comprises a box body, a box cover, a water stop plate, a filter box, a water spraying pipe and a water pump, the interior of the box body is divided into a seedling culture cavity and a water storage cavity through a first partition plate and a second partition plate which are transversely arranged in parallel, and the interior of the seedling culture cavity is divided into a plurality of culture lattices through partition plates which are arranged in a criss-cross mode. The water stop plate is inserted between the first partition plate and the second partition plate from the outer side of the box body in a penetrating mode, the filter box is filled with activated carbon blocks, the water spraying pipe is arranged in the box cover, the water pump is arranged on the side face of the box body, and a water inlet and a water outlet of the water pump are communicated with the water spraying pipe and the filter box through rubber hoses respectively. The box cover is covered, so that the temperature can be kept, the atomization nozzles on the lower side of the water spraying pipe can uniformly irrigate the forest seedlings, the water stop plate is pulled out, redundant water can flow into the water storage cavity from the water leakage holes in the partition plate and then is filtered and conveyed to the water spraying pipe through the water pump for continuous use, water resources are saved, and the device is more practical.

The invention relates to the technical field of excavator door plates, in particular to a combined multilayer protective door plate assembly which comprises a door plate body, a reinforcing plate is arranged on one face of the door plate body, a plurality of reinforcing supporting blocks are arranged in the door plate body, and the interior of the door plate body is divided into a plurality of filling channels by the reinforcing supporting blocks. A bearing channel is further formed in one side of the door plate body; and the buffering and repairing assembly is arranged in the filling channel and the bearing channel. Compared with the prior art, the buffer repairing assembly is arranged, the strain capacity and the continuous use capacity of the door plate under the complex working condition are improved, the service life is prolonged, the maintenance cost is reduced, and the door plate is suitable for keeping good protection performance and maintainability under the high-strength use scene.

The invention discloses a distribution cable branch box state monitoring system and method, and relates to the technical field of branch box state monitoring, and the system comprises a branch box monitoring point screening module, a branch box monitoring module, a branch box state analysis module, an early warning terminal and a database. A target main body set under corresponding monitoring of the distribution cable branch box is obtained through preliminary analysis, further deep monitoring is executed for the target main body set corresponding to the branch box, a state result of corresponding monitoring of the distribution cable branch box is obtained through analysis, and the result serves as a reference standard. The method comprises the following steps: analyzing linkage control measures in a corresponding state of the distribution cable branch box, acquiring trend expression of the distribution cable branch box in a corresponding monitoring state abnormity, and predicting feasibility of the distribution cable branch box in corresponding continuous application, thereby realizing omnibearing intelligent detection of the distribution cable branch box. And the real-time state corresponding to the distribution cable branch box can be comprehensively known.

The invention discloses a heat exchanger for a methanol-to-hydrogen heat exchange system, and relates to the technical field of energy-saving heat exchangers, the heat exchanger comprises a shell, end sockets respectively mounted at two ends of the shell and two tube plates mounted in the shell, and further comprises a tube bundle assembly comprising a plurality of tubes distributed along an annular track; a baffle plate; the independent cleaning mechanism comprises a driving block arranged on the outer wall of one side of one tube plate, a sealing block installed in the driving block, a high-voltage pulse tube installed in the sealing block and a displacement assembly used for driving the sealing block to move; the interior of the tube nest is cleaned one by one from the outer ring to the inner ring, the effect of non-stop cleaning of the heat exchanger is achieved, the problem that in the prior art, the interior of the tube nest can be cleaned only by dismounting the end socket is solved, the continuous use effect of the heat exchanger is guaranteed, and the adjustment plate is repeatedly driven to move left and right and the telescopic check curtain is unfolded and contracted. The formation of a dead zone in the shell is avoided, and scaling and corrosion are reduced.

The utility model discloses a water pumping and draining device for a coal mining face in the field of water pumping and draining, which comprises a shell, a top part connected to the top of the shell, a pollution discharge part rotatably connected to the side surface of the shell, an air inlet window connected to the side surface of the shell, a connecting pipe connected to the bottom of the side surface of the shell in a penetrating manner, and a water pump connected to the other end of the connecting pipe, according to the device, the water pumping use stability in the coal mine environment can be effectively improved, and compared with a traditional device, the device can periodically discharge impurities in the device, so that the manual cleaning frequency is reduced, and the long-time continuous use stability of the device is improved.

The invention discloses a preparation for promoting efficient yield increase and tree cultivation of rubber trees. The invention belongs to the technical field of rubber tree planting, and the preparation comprises CMC-Na, Yitenling, a Nobawen chelating nutrient solution, boron hydroxide, sodium benzoate, melissyl alcohol, 14-sterol and other components, the concentration of each component is optimally designed, and the components are uniformly prepared through special stirring equipment; when in use, the preparation is smeared on a secant of a rubber tree, the latex yield can be remarkably increased, the dead skin rate is reduced, and the dry glue content is increased by continuous use; the problems that the yield increasing effect of rubber trees is limited and maintenance is insufficient are solved through scientific matching and synergistic effect, the method has the advantages of being wide in raw material source, controllable in cost and easy and convenient to operate, is suitable for large-scale popularization, and provides powerful support for sustainable development of the natural rubber industry.

The invention discloses a scalp pre-washing composition and a preparation method thereof, the scalp pre-washing composition comprises the following components in percentage by mass: 0.1-20% of liquid grease, 0.5-20% of a nonionic surfactant, 1-10% of a hair surfactant, 1-80% of polyol and / or 1-30% of sugar alcohol, the sum of the mass fractions of the components does not exceed 100%, and the balance of filler. The shampoo can gently and efficiently clean scalp and hair follicles, silicone oil flocculation deposition of conventional shampoo on the scalp is effectively removed, the scalp epidermis chapped due to dryness can not be generated even if the shampoo is continuously used for a long time, and generation of scalp white crumbs caused by dryness is inhibited.

The utility model discloses a molding powder extrusion sheet cooling device which comprises a conveying device, a water tank is fixedly installed on the bottom wall of the conveying device, two semiconductor coolers are fixedly installed on the outer wall of the water tank, a circulating pump is fixedly installed on the outer wall of the water tank through a first supporting mechanism, and an inlet pipe of the circulating pump penetrates into the water tank. A drainage pipe communicated with the interior is fixedly mounted on the outer wall of the water tank. The semiconductor cooler, the connecting sleeve, the hollow roller and other assemblies are arranged, the hollow roller can rotate through cooperation of the rotating pipe and the connecting sleeve, and therefore the utilization rate of cooling water can be increased, and the cooling water can be continuously output along with continuous output of the circulating pump; the cooling water after heat absorption can flow into the circulating pipe through cooperation of the connecting sleeve on the other side and the connecting pipe, and the cooling water after heat absorption can flow into the water tank again in the circulating pipe and is refrigerated again, so that circulation and continuous use of the cooling water can be realized, and the cooling effect on the extrusion sheet can be ensured.

The present invention provides a method and device for assessing the combined exposure risk of VOCs in children's products. The method includes: obtaining data on the types and usage durations of children's products; establishing a usage association model between children's products, including: establishing a Copula function between the continuous usage duration of children's products and the children's products to be used at the next moment, and calculating the conditional probability density model of the children's products to be used at the next moment under different continuous usage duration conditions; establishing a cellular automaton model of the usage scenarios of children's products based on the usage association model between children's products, and combining with the volatilization rate data of VOCs to calculate the combined exposure dose of VOCs; using a multi-level combined action decoupling method based on the combination index to convert the combined exposure dose of VOCs into the equivalent doses of independent actions of each component substance and summing them up to evaluate the combined exposure risk of VOCs. The present invention can accurately assess the combined exposure risk of VOCs in the usage scenarios of children's products.