716results about How to "Long holding time" patented technology

A teleconferencing system includes: a camera system for imaging a plurality of persons; a voice collector for capturing voices generated by a plurality of persons; and a transmitter for multiplexing an image signal acquired from the camera system and a voice signal acquired from the voice collector and transmitting a multiplexed signal via a communication line. The camera system includes: a camera; a driver for changing the viewing direction of the camera; and a camera controller for controlling the driver. The camera controller includes: a face position detection unit; a registration unit; a timing unit; a drive control unit; and a hold time control unit.

The invention provides a titanium metal vacuum cup and a manufacturing method thereof, belongs to the technical field of daily necessities, and solves the technical problems that a conventional vacuum cup is lower in corrosion resistance and attractiveness and the like. The vacuum cup comprises an outer cup body and an inner cup body, wherein the inner cup body is sleeved with the outer cup body; the orientation of cup rims of the inner cup body and the outer cup body is identical; the inner cup body and the outer cup body are sealed and fixed annularly at the cup rims; a vacuum interlayer is arranged between the inner cup body and the outer cup body; and both the outer cup body and the inner cup body are made of titanium metal pieces. The manufacturing method of the vacuum cup comprises the procedures as follows: a, blank preparation; b, expansion molding; c, cup bottom sheet installation; d, tailless vacuum pumping; and e, finished product blanking. The titanium metal vacuum cup has the advantages of good corrosion resistance, high attractiveness and the like.

The invention discloses a pile main bolt manufacturing technique of a million kilowatt grade nuclear power station. The manufacturing technique includes material-selecting, melting, heating, forging, cooling, after-forging heat treatment, defect-detecting, and forging capability heat treating. When selecting the material, the microelement content of the materials is controlled, the heat preserving duration in the intermediate temperature stage is prolonged, the heat raising and the heat preserving duration in the high temperature stage are reduced, the distortion volume in the course of the forging is controlled between 30 percent and 70 percent, the forging rate reaches 5 above; after-forging heat treatment, ultrasonic defect detecting, and forging capacity heat treating are conducted when the forging is finished. The main bolt produced according to the manufacturing technique of the invention can improve the impact value under the circumstance that the intensity keeps unchanged, theproduct can meet the RCC-M standard requirements completely, and the reliability and the safety of the pile pressure container using the main bolt of the million kilowatt grade nuclear power station can be ensured.

A method of and system for producing oil and valuable byproducts from grains, such as corn, in dry mills are disclosed. The method and system include dewater milling process after fermenting. Further, the method and system are able to produce oil without evaporating. Moreover, the method and system include one or more of the germ processing units, emulsion processing units, fiber processing units, high value protein producing units, and glycerol and inorganic salt producing units, such that high value byproducts are able to be generated.

The invention discloses an exothermic insulating riser sleeve and a preparation method thereof and aims to solve the problems of bad heat insulation, insufficient heating and single effect in a conventional exothermic insulating riser sleeve. According to the formula, the exothermic insulating riser sleeve is prepared from quartz sand, vermiculite, potassium nitrate, calcium chloride, iron sesquioxide powder, graphite powder, aluminum powder, magnesium powder and modified sodium silicate. The method comprises the following steps: (1) weighing raw materials; (2) preparing a mixed wet material; and (3) filling the mixed wet material into a mold, pre-tightening while filling the wet material, performing compression molding, and demolding, thus finishing the operations. According to the formula of the exothermic insulating riser sleeve, the content of an exothermic agent is increased, the exothermic agent has the advantages of rapid heating, and a heating effect is improved. Moreover, the vermiculite serves as a thermal insulation material, is long in thermal insulation time and has a good thermal insulation effect, so that the molten iron feeding ratio in a riser is improved under the combined action of rapid heating and long thermal insulation.

A method for activating at least one headlight of a vehicle has: a step of ascertaining a traffic density from an item of information about road users in the surroundings of the vehicle; a step of determining a control parameter for controlling an emission characteristic of the headlight using the ascertained traffic density; and a step of providing the control command for controlling an emission characteristic of the headlight using the control parameter.

The invention discloses a preparation method of a non-magnetic high-strength texture Ni-W alloy baseband. The preparation method comprises the following steps: acquiring an Ni-9.6 at.% W alloy cast ingot by adopting vacuum induction smelting, carrying out hot forging and hot rolling on the cast ingot, and removing oxide skin positioned on the surface of a hot rolling blank by combining one-pass cold rolling with shot blast treatment; and successfully acquiring the non-magnetic high-strength strong-cube texture hectometre-level Ni-9.6 at.% W alloy baseband by carrying out warm rolling and the cold rolling with a certain deformation amount, introducing stress relief annealing twice in a cold rolling process, longitudinally shearing the cracked edge of a band in the cold rolling process and finally carrying out continuous recrystallizing heat treatment. The preparation method disclosed by the invention lays a good foundation for realizing the industrialized production of second-generation high-temperature superconductors.

The invention discloses a diffusion brazing connecting method for a contact reaction of magnesium alloy and steel, and belongs to the field of dissimilar material connection. The melting point of the magnesium alloy is 650 DEG C only, and the magnesium alloy is sensitive to the welding temperature. Magnesium and steel are dissimilar materials. Particularly, the melting points and the linear expansion coefficients of the two dissimilar materials remarkably differ from each other, so that the welding difficulty of the magnesium and the steel is increased. The diffusion brazing connecting method comprises the steps that an intermediate pure copper layer is manufactured on the surface of the magnesium alloy, so that the magnesium alloy/Cu/steel brazing structure is formed in a combined mode; the magnesium alloy/Cu/steel brazing structure is fixedly arranged inside a vacuum diffusion furnace, the pressure of junction surfaces ranges from 0.0375 MPa to 0.2 MPa, the magnesium alloy/Cu/steel brazing structure is heated, the temperature of the magnesium alloy/Cu/steel brazing structure is kept constant, then, the magnesium alloy/Cu/steel brazing structure is reheated, the temperature of the magnesium alloy/Cu/steel brazing structure is kept constant, heating is stopped, the magnesium alloy/Cu/steel brazing structure is cooled with the furnace until the temperature of the magnesium alloy/Cu/steel brazing structure is smaller than 150 DEG C, and diffusion brazing connection of the contact reaction of the magnesium alloy and the steel is achieved. According to the diffusion brazing connecting method, the welding temperature is lower, the influence on the parent metal is small, no brazing filter metal is needed, the large surrounding and small surrounding phenomena are avoided, the aim that no defects (relative fusion welding) exist in brazing joints of welding of the magnesium alloy and the dissimilar metal is achieved to a certain degree, and the shearing strength of the brazing joints at indoor temperature can reach 39.6 MPa.

The MFIS transistors heretofore have a problem that after data writing, the data disappear in terms of memory transistor operation in about one day at most. This is mainly because the buffer layer and the ferroelectric have a high leakage current and, hence, charge is accumulated around the interface between the ferroelectric and the buffer layer so as to shield the electric polarization memorized by the ferroelectric, making it impossible for the electric polarization of the ferroelectric to control electrical conduction between the source and the drain in the transistor. In the present invention, by constituting an insulator buffer layer 2 of HfO_2+u or Hf_1−xAl_2xO_2+x+y, the leakage current flowing through each of the insulator buffer layer 2 and a ferroelectric 3 can be reduced and a memory transistor having a truly sufficient long data holding time is realized.

The invention discloses a nano microcrystal wood floor and a production method thereof. The technical point is that the nano microcrystal wood floor comprises the following components: PVC-S-4 or PVC-S-5 type PVC resin, heavy calcium carbonate with 250-800 meshes, nanoscale heavy calcium carbonate, flexibilizer, PVC dedicated coupling agent and heat stabilizer. The method comprises the following steps: evenly mixing the above components according to a certain proportion, drying, extruding a plate-type structure through an extruder according to a mould; vacuum sizing, cutting, sanding the bottom surface and the surface; and mortising grooves at the periphery and deeply processing the surfaces to obtain the wood floor. Because of adding a small amount of nanoscale heave calcium carbonate, the invention leads the nanoscale heavy calcium carbonate to be filled between big particles of the heavy calcium carbonate, thus forming complete packing to PVC resin particles and increasing specific surface area; reactivity is improved due to the increasing of specific surface area and improvement of reaction contact surface; the PVC resin particle has high hardness and strong plasticity; and the nano particles in a nano composite can block the formation of crystals, thus greatly improving thermal conductivity.

The invention discloses a steel layer material of a brazing composite strip and a brazing aluminium-steel composite strip. The steel layer material comprises the following components in percentage by mass: 0.001-0.05% of C, 0.01-0.8% of Si, 0.26-1.6% of Mn and the balance of Fe and unavoidable impurity elements; the brazing aluminium-steel composite strip comprises an aluminium layer and a steel layer; the aluminium layer comprises the following components in percentage by mass: 0.8% of Si, equal to or less than 0.8% of Fe, equal to or less than 0.1% of Cu, equal to or less than 0.05% of Mn, equal to or less than 0.05% of Zn and the balance of Al and unavoidable impurity elements; and the steel layer is the steel layer material. According to the invention, through changing components of the steel layer material, generation temperature of intermetallic bristle compounds of the brazing composite strip is raised, the soaking time for generation of intermetallic bristle compounds of the brazing composite strip is prolonged, and the cost price of the steel layer is lowered.

A cryostat (1) with a magnet coil system including superconductors for the production of a magnet field B₀ in a measuring volume (3) within a room temperature bore (2) of the cryostat has a plurality of radially nested solenoid-shaped coil sections (4, 5, 6) which surround the room temperature bore and which are electrically connected in series, at least one of which being an LTS section (5, 6) with a conventional low temperature superconductor (LTS) and at least one of which being an HTS section (4) including a high temperature superconductor (HTS), wherein the LTS section (5, 6) is located in a helium tank (9) of the cryostat (1) along with liquid helium at a helium temperature T_L. The apparatus is characterized in that the HTS section (4) is disposed radially within the LTS section (5, 6) in a vacuum portion of the cryostat and is separated from the LTS section (5, 6) by the helium tank (9) wall (9a) facing the room temperature bore. The HTS coil section can be reliably used in the cryostat over a long period of time (FIG. 1a).

A liquid natural gas filling system structured to store a cryogenic fluid at a low pressure and fill a use vessel at a high pressure. The filling system includes a first, low pressure vessel, at least one second, high pressure vessel, a plurality of conduits, each conduit in the plurality having a valve, extending between, and in fluid communication within the first, low pressure vessel and the at least one second, high pressure vessel, a pressure building means coupled to the at least one second, high pressure vessel and structured to raise the pressure of a cryogenic liquid within the at least one second, high pressure vessel, and an outlet nozzle structured to be coupled to a use vessel, the outlet nozzle coupled via the plurality of conduits to, and in fluid communication with, the first, low pressure vessel and the second, high pressure vessel. The filling system is structured so that a cryogenic liquid may be stored in the first, low pressure vessel at a low pressure. The cryogenic liquid at a low pressure may further be transferred to the at least one second, high pressure vessel via the plurality of conduits. The pressure of the cryogenic liquid at a low pressure in the at least one second, high pressure vessel may be increased to a high pressure by actuating the pressure building means. Thus, the cryogenic liquid at a high pressure in the at least one second, high pressure vessel may be transferred from the at least one second, high pressure vessel to a use vessel via the plurality of conduits and the nozzle.

The invention provides a method for preparing high-density ultrafine-grained rare earth oxide doped tungsten alloy, and belongs to the field of powder metallurgy. The preparation method comprises thefollowing steps: preparing an oxide composite powder precursor by using ammonium metatungstate, rare earth nitrate, fuel and ammonium nitrate as raw materials and adopting a low-temperature solution combustion synthesis method, and then reducing by using H2 to prepare nano rare earth oxide doped tungsten alloy powder; and preparing the high-density ultrafine-grained rare earth oxide doped tungstenalloy by adopting multi-step discharge plasma sintering. According to the method, a low-temperature solution combustion synthesis method adopted can achieve the mixing at a molecular level, thus thetungsten oxide and the rare earth oxide in the obtained precursor are uniformly mixed, and the reduction product is alloy powder without subsequent special treatment; the SPS is suitable for rapid sintering of refractory metals and materials difficult to sinter, and the high-density ultrafine-grained rare earth oxide doped tungsten alloy can be obtained by adopting multi-step SPS; the relative density can reach 96-99%, and the average grain size is less than or equal to 300nm. The method has the advantages of simple and easily obtained raw materials, simple equipment and quick process, and issuitable for large-scale production.

The invention belongs to the field of aluminum alloy sheets for automotive bodies, and relates to a six-series aluminum alloy sheet for an outer plate of an automotive body and a preparation method thereof. The six-series aluminum alloy sheet is prepared from the following elemental constituents according to weight percentages: 0.55 to 0.65 % of Si, 0.10 to 0.20% of Fe, 0.10 to 0.20% of Cu, 0.05 to 0.15% of Mn, 0.65 to 0.75% of Mg, 0. 01 to 0.03% of Ti, less than or equal to 0.03% of single impurity, less than or equal to 0.10% of impurities in total, and the balance being Al. According to thepreparation method of the six-series aluminum alloy sheet, the rolling pass and working procedure time of hot rough rolling are strictly limited, and annealing is performed two times in the cold rolling process. Compared with a traditional 6016 alloy, the finished product has the advantages that the edge covering performance is significantly improved, the finished product has a smooth and fine surface without macroscopic Roping line defects after stamping, and the surface quality is significantly improved.

The invention discloses a method for rapidly preparing high heat conduction Si3N4 ceramic with low cost. The method is characterized in that Si powder is taken as a raw material, ZrO2 powder is taken as a nitridation catalyst, ZrO2-MgO-Re2O3 is taken as a sintering aid, wherein Re2O3 is taken as a rare earth oxide, Si, ZrO2 and MgO-Re2O3 are mixed according to mass fraction and then dried to obtain a Si-ZrO2-MgO-Re2O3 mixing powder; the mixing powder is subjected to a two-step insulation method and a pressureless sintering process to obtain the high heat conduction Si3N4 ceramic; According to the ceramic material, the relative density is higher than 95%, hardness is 8-20 GPa, fracture toughness is 3-8MPa.m<1/2>, bending strength is 200-1000Mpa, and the thermal conductivity is 20-100W.m<-1>,K<-1>. By introducing a ZrO2 catalyst, Si powder nitridation IS accelerated, the introduction of ZrO2-MgO-Re2O3 can improve the densification of Si3N4, and the high heat conduction Si3N4 ceramic can be rapidly prepared with low cost.

The invention discloses a composite fiber with effects of heat accumulation, heat preservation and health protection. The composite fiber is obtained with the following technique: heating coffee grounds to a certain extent to generate nanometer-level coffee carbon; nanocrystallizing far-infrared material which contains a plurality of metal ions; uniformly mixing polyester slices, silane coupling agents, zine stearate as a surfactant and liquid wax as a dispersant to form a melted polyester material; uniformly mixing the nanometer-level coffee carbon, the far-infrared material and the melted polyester material in a weight ratio of 1:1:3.2 to 3.8 into a mixture; forming masterbatches from the mixture with a granulator; uniformly mixing the masterbatches and polyester slices in a weight ratio of 1:8.2 to 9.2 and melting filature to form composite filaments with effects of heat accumulation, heat preservation and health protection; and forming long fiber with effects of heat accumulation, heat preservation and health protection by drafting the composite filaments. The composite fiber provided by the invention has such functions as good moisture-absorbing capability and air permeability, strong capability in health protection and heat storage, and long heat preservation time and so on.

The invention discloses a drive gear and a preparation method thereof. The drive gear consists of the following chemical components in percentage by weight: C, Si, Mn, Cr, Ni, Nb, V, Cu, P, S, lanthanide-series rear earths and the balance of Fe. The preparation method for the drive gear comprises the following steps: preparing a blank by adopting a casting mode; then, carrying out thermal treatment on the blank, a cutting process on rough-turning gear ring gear blank, a rough-milling gear-hobbing process, carburizing and nitriding treatment, tempering, hardening and tempering thermal treatment; and finally, carrying out a finish turning process and finish-milling gear-hobbing process and then inspecting, packaging and storing. The drive gear is high in strength, hardness and abrasive resistance, good in corrosion resistance and oxidization resistance, high in yield strength and tensile strength; and the gear processing method is simple, low in cost and good in molding performance.