13results about How to "Long operating time" patented technology

The invention provides an operating method of a memory device and a memory device thereof. The memory device can be a three-dimensional NAND flash memory with high capacity and high performance. The operating method includes performing a program operation on the plurality of memory cells based on the i-th potential state. The programming operation based on the ith potential state comprises the following steps: in a programming pulse stage, applying a programming pulse corresponding to the ith potential state to a plurality of first storage units corresponding to the ith potential state; and, in a verification stage after the program pulse stage, performing a first sensing operation on the plurality of second memory cells in the (i-1)-th potential state to verify a threshold voltage distribution situation of the plurality of second memory cells, and performing a second sensing operation on the plurality of first memory cells to implement a program verification operation in the i-th potential state.

This invention discloses a low-temperature thermoplastic composition and the low-temperature thermoplastic material made therefrom, as well as its applications, relating to the field of medical materials technology. The low-temperature thermoplastic composition mainly comprises the following components: thermoplastic resin, reinforcing filler, and radiation crosslinking agent; the thermoplastic resin includes polyurethane, and each 100 parts of the low-temperature thermoplastic composition contains at least 27 parts of a first polyurethane with a flow start temperature of 50-95°C and an open time of at least 6 minutes. Through the selection of polyurethane and the combination of reinforcing filler, the low-temperature thermoplastic composition enables the low-temperature thermoplastic material to have lower shrinkage and a longer operating time, allowing the low-temperature thermoplastic material prepared from the composition to be used for fixation of parts with higher operating time requirements.

The utility model discloses a wire harness CCS nickel sheet rapid positioning buckle structure, and relates to the wire harness CCS nickel sheet technology field, the wire harness CCS nickel sheet rapid positioning buckle structure comprises a fixing plate, and the top of the fixing plate is provided with a buckle installation mechanism. According to the utility model, through the arrangement of the buckle mounting mechanism, the effects of quickly positioning the nickel sheet and conveniently mounting and fixing the aluminum row on the fixing plate can be achieved, and in the use process, the problems that the aluminum row is inconvenient to mount and fix on the fixing plate, so that the mounting position has certain deviation when the aluminum row is assembled, and the aluminum row cannot be conveniently mounted and fixed on the fixing plate can be avoided. The problems that the nickel sheet cannot be conveniently and rapidly positioned, so that the operation time of workers is prolonged, the assembly speed is reduced, the overall production progress is influenced, the workers are possibly tired due to the increase of the operation difficulty, and the production efficiency is influenced are solved. The working efficiency and the product quality are further influenced, and the practicability of the positioning buckle structure is ensured.

The invention discloses a liquid flame retardant, a vacuum infusion flame-retardant epoxy resin raw material composition, epoxy resin and a preparation method and application thereof. The liquid flame retardant disclosed by the invention is a complex of alkyl dimethyl phosphate-thiourea. The vacuum infusion flame-retardant epoxy resin raw material composition comprises a component A, a component B and a component C, wherein the component A comprises epoxy resin and an optional diluent, the component B comprises a curing agent and an accelerant, and the component C comprises a liquid flame retardant. The component A, the component B and the component C are mixed and subjected to vacuum defoaming, and then the vacuum infusion flame-retardant epoxy resin is obtained. A novel liquid flame retardant is developed, the flame retardant target is achieved through the synergistic effect of phosphorus, nitrogen and sulfur, the flame retardant property of a cured product of the vacuum infusion flame-retardant epoxy resin reaches the standard, especially, the vacuum infusion flame-retardant epoxy resin has very low viscosity and very long operation time at normal temperature, and has relatively high glass transition temperature and tensile strength, and the vacuum infusion flame-retardant epoxy resin can be applied to the field of flame retardants. The comprehensive performance is excellent.

The invention relates to the technical field of inorganic non-metallic materials, discloses a composite calcium source calcium zinc phosphate refractory material, a preparation method and application, and aims to solve the technical problems that the reaction is out of control, the water-soluble substance residue is high and the performance is difficult to consider in the preparation of the traditional calcium zinc phosphate material. Calcium hydroxide and calcium carbonate are adopted to form a composite calcium source, and a dynamic time-sharing feeding process is matched and comprises the following steps: firstly, stirring a phosphoric acid aqueous solution and a zinc oxide-calcium hydroxide mixture at 20-35 DEG C for 20-40 minutes to form initial slurry, then adding calcium carbonate accounting for 0-30% of the total calcium mole number at an initial thickening point of the slurry, continuing to stir for 20-40 minutes, and finally, adding calcium carbonate accounting for 0-30% of the total calcium mole number at the initial thickening point of the slurry; and carrying out suction filtration, and drying at 100-110 DEG C for 1.5-2.5 hours to obtain a finished According to the method, the operable time is prolonged by more than 200%, the content of water-soluble substances is reduced by more than 50%, high early strength and structural compactness are both considered, and the method is suitable for the fields of high-end anticorrosive coatings and the like and has remarkable process and performance advantages.

This utility model discloses a ceramic cooling platform for dental cement and a disposable mixing dish, belonging to the field of dental medical devices. The device includes a ceramic cooling platform body and a disposable mixing dish for cooling. The platform body is made of ceramic material and can be refrigerated or frozen. It has an internal groove that matches the disposable mixing dish, and a small groove on top for holding liquids such as dental treatment agents. The bottom has an anti-slip design. The disposable mixing dish is made of polyethylene or polypropylene material and has a skirt-shaped support. The outer radius of its groove matches the groove of the cooling platform. In use, the cooling platform is pre-cooled before placing the disposable mixing dish on it for cement mixing. The cooling effect of the platform extends the usable time of the cement while avoiding adhesion between the dental cement and the mixing dish and the risk of infection from repeated use. This utility model solves the problems of existing mixing dishes lacking cooling function, easy adhesion, difficult cleaning, and the risk of infection, demonstrating significant practicality and innovation.

The utility model discloses a double-station feeding steel wire ring feeding device which comprises two groups of steel wire ring preset seats which are arranged side by side at intervals, a tire body drum is arranged on one side of each steel wire ring preset seat, and a portal frame is arranged above the steel wire ring preset seats and the tire body drum. The portal frame is provided with a steel wire ring transferring mechanism and a driving assembly used for driving the steel wire ring transferring mechanism to move. A plurality of groups of steel wire rings are placed on the steel wire ring presetting seat; the portal frame is matched with the driving assembly to drive the steel wire ring transferring mechanism to reciprocate between the steel wire ring presetting seat and the tire body drum; the steel wire ring transferring mechanism is used for transferring the steel wire ring on the steel wire ring presetting seat to the tire body drum; after the steel wire rings on one group of preset seats are supplied, the steel wire rings can be quickly switched to the other group of preset seats which finish feeding to continue working, so that the shutdown waiting time of a single-station feeding device when feeding is not in time is avoided, continuous production is realized, and the overall production efficiency is greatly improved.

A dental alginate impression material according to one aspect of the present invention contains an alginate, calcium sulfate, and an aminocarboxylic acid.

The reinforcing filler in the dental resin cement composition provided by the present invention has a particle size distribution that simultaneously satisfies D75-D25≤0.95μm, D25-D15≤0.7μm, and D50 of 0.5~1.0μm. Specifically, the present invention improves the chemical curing time, edge sealing, and linear shrinkage rate of dental resin cement by controlling the D15 / D25 / D75 and D50 of the reinforcing filler in the matrix and catalytic portions to have the above-mentioned specific numerical relationships.

The application relates to the technical field of building plugging materials, and particularly provides a long-operable-time plugging material, which is prepared from the following raw materials in terms of total weight: 0.02-3% of a retarder, 0.005-2% of a calcium salt, 0.001-1% of a cellulose ether and cement supplementing to 100%. By optimizing the types of the retarder, the calcium salt and the cellulose ether and by stipulating the relative amounts of the retarder, the calcium salt and the cellulose ether, the quick-setting type plugging material has a relatively long retarding time, and the anti-bending performance, the anti-permeation performance, the bonding performance, the heat resistance and the freeze-thaw cycle resistance of the material after solidification are effectively improved.

This invention discloses a concrete composite admixture for precast concrete wind turbine tower components, comprising the following components by weight: 40-60 parts anhydrous calcium sulfoaluminate, 5-15 parts nano-calcium carbonate, 15-30 parts silica fume, 10-20 parts microspheres, 0.2-0.8 parts rheology modifier, 3-5 parts superplasticizer, and 1-5 parts sodium nitrite. The concrete composite admixture of this invention, when used in precast concrete wind turbine tower components, results in concrete with good workability, no bleeding or segregation, self-compacting properties, no need for vibration molding, ultra-long workable time, early strength and high strength, aesthetically pleasing appearance, low binder usage, low creep, minimal expansion, excellent crack resistance, and good durability.

The utility model discloses an automatic folding wing spring assembling device, which relates to the field of automatic spring pressing and assembling and comprises an assembling and mounting table (3), a spring assembling mechanism (1) is arranged above the assembling and mounting table (3), one side of the spring assembling mechanism (1) is provided with a grabbing claw pressing mechanism (2), and the other side of the spring assembling mechanism (1) is provided with a clamping claw (3). According to the folding wing spring automatic assembling device, the prior art is improved, and in actual use, through the discharging automatic detection assembly, the problems that most existing folding wing spring automatic assembling devices are lack of integrated quality detection modules, manual secondary screening is still needed, and the production efficiency is high are solved. For example, in traditional detection, finished products need to be transferred to an independent detection station, the problems of procedure separation, response delay and the like exist, and defective products are difficult to remove in real time.

The utility model relates to the technical field of digital tube bending foot, disclose a kind of adjustable digital tube automatic bending foot device, including bending foot machine, the sliding platform is slidably connected in the bending foot machine inner wall, the sliding platform inner wall is provided with adjusting assembly, the sliding platform outer wall is fixedly connected with press bender, the bending foot machine top is fixedly connected with worktop, the worktop outer wall is provided with clamping assembly, the adjusting assembly includes limiting rod, the limiting rod outer wall is slidably connected in the sliding platform inner wall, the bending foot machine inside is provided with fixed hole, the limiting rod outer wall is slidably connected in the fixed hole inner wall. In the utility model, by pulling pull rod to drive limiting rod to move, then by limiting rod to move out of fixed hole inside to release the fixation of sliding platform, avoid facing the digital tube of different thickness or height, due to insufficient pressure, leading to digital tube pin deformation, fracture, even damage digital tube itself, to ensure the flatness and consistency of bending foot.