36results about How to "Avoid cost reduction" patented technology

The invention provides a preparation method of a nanoporous amorphous-state electrocatalytic electrode, and relates to the field of electrochemical catalysis. The method comprises the following stepsthat firstly, metallic raw materials and nonmetallic raw materials are put in proportion, fused and then stirred uniformly, cooling is conducted, and an electrocatalytic electrode alloy is obtained, wherein metallic elements in the metallic raw materials comprise one or more of iron, cobalt, nickel, copper, zinc, titanium, magnesium and molybdenum, and nonmetallic elements in the nonmetallic raw materials comprise one or more of silicon, phosphorus, nitrogen, boron and carbon; secondly, the alloy obtained in the first step is fused again and subjected to quenching, and an amorphous-state electrocatalytic electrode is obtained; and thirdly, the amorphous-state electrocatalytic electrode obtained in the second step is soaked in an erosion agent for reacting, and the nanoporous amorphous-state electrocatalytic electrode is obtained. The nanoporous amorphous-state electrocatalytic electrode prepared through the method has the three-dimensional porous structure, the high specific surface area and the high-activity core-shell structure, and the electrocatalytic activity conductivity is excellent.

The invention discloses a method of electrochemistrically modifying the biological performance of a silicon surface. The method comprises the following steps: firstly, dissolving an alkaline reagent or a weakly acidic reagent into water to obtain an alkaline or weakly acidic electrolytic solution; then using crystal silicon as an anode (g) and conductive inert material as a cathode (i) to form a double-electrode electrolytic system, using the prepared alkaline or weakly acidic electrolytic solution as an electrolyte (h) and adopting a direct current (b) to oxidize the anode (g) of the crystal silicon; afterwards, preparing a bionic solution with a certain ingredients, soaking the crystal silicon after anode oxidization treatment at a temperature close to a physiological temperature, periodically refreshing the silicon-soaked bionic solution and drying the bionic solution to obtain an osteolith coating of a silicon-based type. The invention can be directly applied to biomedical crystal silicon material to improve the biological compatibility and the binding performance of the silicon material surface, has low cost, mild modification conditions and is convenient and controllable.

The invention relates to a membrane tube assembly, said assembly comprising a cylindrical housing (102) containing a plurality of tubular membrane portions (104) extending in the axial direction and having ends (105, 105' ) are connected to each other to form a longer tubular membrane part. The cylindrical housing (102) includes a heatable cavity (110) containing U-shaped connecting pipes (115) arranged on one or both sides of the cavity and passing through the cavity. The two open ends of the separation walls (117, 114) between the cavity (110) and the housing (102) are connected to two adjacent open tubular membrane parts (112, 112') respectively, forming a membrane circuit.

The invention relates to a preparation method of a copolymerized carbonic ester with improved performance, the copolymerized carbonic ester and application of the copolymerized carbonic ester. The copolymerized carbonic ester is prepared by taking BPTMC and BPA as raw materials and comprises a structural unit of a general formula (I), and the copolymerized carbonic ester is characterized in that the raw material BPTMC contains 1-5000 ppm of bisphenol with a structure of a formula (II). According to the copolycarbonate prepared by the method disclosed by the invention, the content of impurities in a molded product can be effectively reduced by controlling the dosage of a hydrogen chloride catalyst and the like in a raw material synthesis process, so that the phenomenon that phenolic monomers induce thermal degradation or thermal oxidation degradation of polycarbonate when the product is exposed in a high-temperature load is avoided, and the mechanical, thermal and optical properties of the polycarbonate are optimized.

The invention discloses a preparation method of a Ti4O7 / Ti3O5 mixed-phase fiber electrocatalyst and an application of the electrocatalyst in oxygen reduction. The electrocatalyst is prepared by the following steps: firstly, preparing a TiO2 nanofiber membrane by utilizing an electrostatic spinning method; and then annealing the TiO2 nanofiber membrane in an inert environment at the temperature of980-1050 DEG C to obtain the electrocatalyst. The preparation method of the Ti4O7 / Ti3O5 mixed-phase fiber electrocatalyst provided by the invention is simple and environment-friendly, and the diameterof the obtained nanofiber is 150-500nm. When the Ti4O7 / Ti3O5 mixed-phase nanofiber is used as an oxygen reduction electrocatalyst, the Ti4O7 / Ti3O5 mixed-phase nanofiber has high oxygen reduction catalytic activity, methanol resistance and stability, and the problems that commercial Pt / C is poor in stability and high in cost are solved.

The invention discloses an air purifier based on an electromagnetic principle. The air purifier is based on the electromagnetic principle and a water vapor adsorption sedimentation principle, the airpurifier comprises a shell, a circuit assembly, a water tank, a haze-particle absorbing device set and a controller with a panel. The haze-particle absorbing device and the circuit component operate in a pulse mode. When the haze-particle absorbing device and the circuit component are not electrified, and external haze particles can freely pass through the insulating porous isolating plate; afterthe haze-particle absorbing device and the circuit assembly are electrified, the polarized haze particles are gathered to the periphery of inner metal plates, meanwhile, a large amount of water vaporis contained in the inner metal plate space and the outer metal plate space of the haze-particle absorbing device, and the partial of haze particles can be mutually polymerized so as to form large particles, finally, the large particles is fell into a lower water tank due to the main effect of the gravity of the particles; after the haze particles of the device are saturated, the haze-particle absorbing device and the circuit component return to the non-electrified state again. The air purifier based on the electromagnetic principle solves the problem that the existing air purifier filter screen is high in manufacturing difficulty, the air purifier is high in price, single in function and high in energy consumption.

The invention discloses an aerosol laser radar system based on CCD lateral detection. The aerosol laser radar system comprises a CCD and at least two cylindrical mirrors which are arranged side by side, wherein included angles between axes of the plurality of cylindrical mirrors correspondingly penetrating through focuses of the cylindrical mirrors and a horizontal plane are sequentially increasedor decreased progressively, and focal lines of the cylindrical mirrors are simultaneously positioned on a CCD detection surface; and the CCD and the plurality of cylindrical mirrors are respectivelyfixed on angle adjusting mechanisms corresponding to the CCD and the cylindrical mirrors. According to the laser radar detection system, the plurality of cylindrical mirrors which are arranged side byside at different angles are adopted to receive atmospheric aerosol information of different height sections at the same time, the plurality of cylindrical mirrors are used for replacing a traditional single lens, and the CCD can detect a plurality of side-by-side light beams representing a plurality of height sections, so that the spatial resolution of detection is improved on the premise that the detection height range is ensured, and meanwhile, the precision reduction of a bottom layer and a high layer due to fisheye lens distortion is avoided.

The invention provides a making method of a composite material tube. The method comprises the following steps: making a solid mandrel by using a foamable substance or a substance with a large expansion coefficient and a soluble substance; attaching the outer peripheral face of the mandrel with a composite material; putting the mandrel in a die, and heating to make the mandrel have an increasing volume and expand in order to make the composite material expand toward and push the inner wall of the die and also make the composite material compact, hardened and molded to form a tube; and dissolving the mandrel by using a solvent, and allowing the obtained solution to flow out of the tube. The strong and solid tube with a compact structure can be obtained through the making method, and the making method has the advantages of simplification of a mandrel removal step, good dimensional precision, and substantial increase of the yield.

The invention relates to refrigerant system oil accumulation removal, and discloses a method and a system for removing oil accumulation from refrigerant lines of a vehicle HVAC system having multiplerefrigerant loops each having an evaporator is disclosed. The method for operating the system may comprise the steps of: monitoring a flow rate through at least one of the refrigerant loops; determining if the flow rate through any of the at least one refrigerant loops being monitored is below a predetermined flow rate for greater than a predetermined time limit; monitoring for an indication of imminent vehicle operation; and if the indication of imminent vehicle operation is detected and the flow rate through any of the at least one refrigerant loops being monitored is below the predeterminedflow rate for greater than the predetermined time limit, opening a valve to allow for maximum flow through the at least one refrigerant loop.

The invention provides a movable conducting block and a solid-sealed polar pole. The movable conducting block comprises a lower conducting block, an upper conducting block, a conductive pole and flexible links, wherein the lower conducting block is provided with a first through hole; the upper conducting block is provided with a coaxial second through hole of the first through hole; the conductive pole penetrates into the first through hole and the second through hole; one end of each flexible link is fixed to the upper conducting block, and the other end of the flexible link is fixed to the lower conducting block; the flexible links are used for forming the electric connection between the upper conducting block and the lower conducting block. The movable conducting block can avoid temperature rise, and reduce the cost.

The invention discloses an operation control method, a device and an intelligent terminal of a touch pad. The method comprises the following steps: detecting the touch operation of the touch pad to obtain at least one touch position; Determining a touch trajectory when a user executes the touch operation by using each touch position and a touch time corresponding to each touch position; Determining an operation type corresponding to the touch trajectory; A corresponding control operation is performed based on the operation type. The embodiment of the invention reduces the cost of the intelligent terminal and improves the utilization rate of the intelligent terminal.

The invention provides a gas-liquid separator for a plate-type evaporator and the plate-type evaporator. The gas-liquid separator for the plate-type evaporator comprises a shell, a longitudinal separation plate, a first separation plate, a second separation plate, a liquid inlet pipe connection end, a gas outlet pipe connection end and a liquid outlet pipe connection end, wherein the longitudinal separation plate divides the internal space of the shell into two parts including a gas-liquid separation cavity and a liquid storage cavity; the gas-liquid separation cavity is divided into a gas separation region, a jetting region and a liquid separation region from top to bottom through the first separation plate and the second separation plate; the liquid inlet pipe connection end communicates with the jetting region and the exterior of the shell and is used for connecting a liquid inlet pipe which supplies refrigerating fluid to the plate-type evaporator; the gas outlet pipe connection end communicates with the gas separation region and the exterior of the shell and is used for connecting a gas outlet pipe which discharges gaseous refrigerating fluid to the exterior of the shell; and the liquid outlet pipe connection end communicates with the liquid separation region and the exterior of the shell and is used for connecting a liquid outlet pipe which conveys liquid refrigerating fluid to the plate-type evaporator. By means of the scheme, the situation that the gaseous refrigerating fluid enters the evaporator, and consequently the effective heat exchanging area of the evaporator is reduced, and the heat exchanging efficiency of the plate-type evaporator is effectively improved.

There is provided a well plate including a plate and a well which is opened in an upper surface of the plate, wherein the well includes a flat bottom surface part and a circumferential wall part rising upward from the circumferential edge of the bottom surface part; the circumferential wall part has a stepped part in the circumferential direction at an arbitrary height position; an upper circumferential wall part, which is located above the stepped part in the circumferential wall part, is larger in a cross sectional area than a lower circumferential wall part located below; and the stepped part indicates the lower limit of the liquid level height of a liquid sample contained in the well.

The invention discloses seed crystal high-temperature bonding equipment for aluminum nitride crystal growth and a method thereof. The seed crystal high-temperature bonding equipment comprises seed crystals, a crucible, an aluminum nitride crystal growth furnace, mechanical polishing and chemical cleaning equipment and a special heating and pressurizing device, pretreating the surface of a crucible cover and the back of the seed crystal, and placing the seed crystal on the crucible cover placing the crucible cover on a sample table of a heating and pressurizing device; placing a sacrificial wafer with the unpolished surface on the front face of the seed crystal in advance, and pressurizing the crucible cover and the seed crystal; raising the temperature and keeping the temperature; slowly cooling, filling nitrogen into the heating chamber to normal pressure, and slowly unloading a pressure transmission device on the sacrificial wafer; carrying out high-temperature shaping on the bonded seed crystal and crucible cover in an aluminum nitride crystal growth furnace; and therefore, obtaining the well-bonded aluminum nitride seed crystal. According to the method, the growth quality of the aluminum nitride single crystal can be improved, the process is simple, and low-cost preparation of the aluminum nitride single crystal is facilitated.

The invention relates to a preparation method of copolycarbonate with improved thermal degradation resistance prepared by using BPTMC and BPA as raw materials, copolycarbonate and application thereof, the copolycarbonate comprises a structural unit with a general formula (I), and the copolycarbonate is characterized in that the raw materials contain 1-1000 ppm of bisphenol with a structure of a formula (II). According to the copolycarbonate prepared by the method disclosed by the invention, the thermal property of the copolycarbonate can be further optimized by controlling the content of the bisphenol with the structure as shown in the formula (II), and thermal degradation or thermal oxidative degradation induced by residual phenolic monomers is slowed down or avoided.

The invention discloses a preparation method of a g-C3N4 / Ti4O7 composite nano material and application of same in electrocatalytic oxygen reduction. The preparation method comprises the following steps: preparing g-C3N4 by using a high-temperature annealing method, preparing a g-C3N4 / TiO2 compound by using a hydrothermal reaction, and coating the surface of the g-C3N4 / TiO2 compound with a layer ofPDA to form a g-C3N4 / TiO2 / PDA composite precursor; and finally, annealing the g-C3N4 / TiO2 / PDA composite precursor at the temperature of 850-1000 DEG C in an inert environment to obtain the g-C3N4 / Ti4O7 composite nano material. The preparation method of the g-C3N4 / Ti4O7 composite nano material is simple, low in cost and environmentally friendly, and the particle size of Ti4O7 nano particles rangesfrom 10 nm to 30 nm. When the g-C3N4 / Ti4O7 composite nanomaterial is used as an oxygen reduction electrocatalyst, the g-C3N4 / Ti4O7 composite nanomaterial has high oxygen reduction activity, methanoltoxicity resistance and stability, and the problems of low commercial Pt / C reserves and high cost are solved.

The invention discloses a chip-on-board (ChipOnBoard, COB) package structure, which comprises a substrate, a light emitting diode, a seal wall and a seal layer. The light emitting diode is arranged on one side of the substrate. The seal wall is arranged at the periphery of the light emitting diode and a package area is formed by the seal wall and the periphery of the light emitting diode. The seal wall has a package height on the substrate to form a package area equipped with the above package height. The seal layer is arranged in the package area to seal the light emitting diode inside the package area. By utilizing the invention, glue is prevented from overflowing out of the package area during the seal process. Meanwhile, the internal resistance and the manufacture cost are low. In addition, a process method corresponding to the package structure of the chip-on-board is also provided.

The invention relates to a chiral preparation method for N-t-butyloxycarboryl-(4S)-(p-phenyl phenyl methyl)-4-amino-(2R)-methylbutyric acid. The chiral preparation method comprises the following step: enabling a compound (1) and hydrogen to react in the presence of Pd / C and (S-phenylethylamine), thereby preparing a compound (2-a) as shown in the specification. The chiral preparation method is simple in reaction condition, easy to operate, easy in obtaining reagents, and applicable to industrial production, the cost can be lowered as an expensive chiral catalyst is not used, and both the reaction efficiency is improved and the product purity is ensured.

The invention relates to a solar foaming material which is prepared by raw materials by weight ratio and a method comprising the steps of: fully mixing 89-91.5% of polyether, 0.5-3.0% of silicone oil, 0.5-2.5% of foam stabilizer, 1.5-3% of catalyst, 1.5-3% of auxiliary agent and 1-4% of scaly white mica with 20-40 meshes in a reaction kettle to obtain mixture A; evenly mixing material HFC-245fa and water according to the weight ratio of 3-10: 1 to obtain mixture C; evenly mixing the mixture A and the mixture C according to the weight ratio of 1: 0.05-0.3 to obtain mixture B; mixing isocyanate and the mixture B according to the weight ratio of 1.10-1.30: 1, and then foaming by a high pressure gun with 100-150 bar; and finally, curing at 45-65 DEG C to obtain the polyurethane solar foaming material. The solar foaming material has no damage to the atmospheric ozone layer and has flame retardant function and excellent heat insulation effect.

The invention relates to an elastic radial sliding bearing with adjustable gaps. The left end and the right end of the elastic bearing are each provided with eight gaps; the outer circle of the elastic bearing is provided with two outer conical surfaces, the inner holes of a bearing outer sleeve and a bearing inner sleeve are both designed as inner conical surfaces, the bearing outer sleeve and the bearing inner sleeve are respectively matched with the outer conical surfaces of the elastic bearing through the inner conical surfaces, and the bearing outer sleeve and the bearing inner sleeve arein threaded connection; and if the clearance between the bearing and a rotor is too large in the assembling, trial running, overhauling and using processes of equipment, the bearing inner sleeve canbe screwed at any time according to the technical requirements, and the clearance between the inner hole of the bearing and the rotor can be adjusted. The elastic radial sliding bearing with the adjustable gaps avoids the situation that due to the too big clearance between the bearing and the rotor (transmission shaft) caused by design, use, manufacturing and the like, the bearing needs to be re-manufactured, and has the advantages of reducing the cost and improving the efficiency. The elastic scaling gaps are large, and serialization and standardization of the sliding bearing can be realized.Reasonable clearance adjustment can best control the temperature and vibration during operation of the bearing and the rotor.

The invention aims to provide a straight-through all-glass vacuum heat collecting tube. According to the straight-through all-glass vacuum heat collecting tube, every two heat collecting tubes are allowed to be connected in a manner that the size of a joint is small. The invention further provides a building and a module thereof and a vacuum heat collecting tube assembly which comprise the all-glass vacuum heat collecting tubes. The straight-through all-glass vacuum heat collecting tube comprises a tube body, wherein the tube body comprises an inner tube, an outer tube and a vacuum interlayerlocated between the inner tube and the outer tube, the outer pipe can allow sunlight to penetrate, the outer surface or the interior of the inner tube is provided with a solar heat collecting materialfor absorbing solar radiation, the end of the vacuum heat collecting tube further comprises a connecting pipe opening formed in at least one end of the pipe body in an extending mode, and the shape of the connecting pipe opening is a necking or flaring shape.