112results about How to "Improve the effective use of area" patented technology

The invention relates to a novel ordering membrane electrode and a preparation method and application thereof. The membrane electrode consists of a composite electrolyte membrane and a catalyst layer. The composite electrolyte membrane is a proton exchange membrane modified by Pd metal or Pd-Cu alloy or Pd-Ag alloy or Pd-Ni alloy or Pd-Ag-Ni alloy, the catalyst layer is an ordering catalyst layer which comprises a composite electrolyte membrane metal layer consists of conducting polymer nanowires distributed on the surface in an ordering array mode and Nafion self-assembled Pt-PDDA catalyst adhered to the surfaces of the conducting polymer nanowires. The novel ordering membrane electrode has the advantages of being low in Pt bearing capacity, high in utilization rate and the like and can effectively reduce the cost of a fuel-cell catalyst. In addition, the novel ordering membrane electrode can enhance mass transfer of fuel in the catalyst layer while effectively reducing liquid fuel penetration and accordingly improves the fuel utilization rate.

The invention provides a composite surface flow wetland system, which comprises a water distribution channel used for water inflow, water collection channels positioned on the two sides of the water distribution channel and used for water discharge, and a plurality of deep grooves used for communicating the water distribution channel with the water collection channels, wherein the adjacent deep grooves are communicated through at least two shallow grooves to form a plurality of planting base cells; a mixed planting zone in the middle and emerged plant zones at the periphery of the mixed planting zone are arranged in each planting base cell; and emerged plants and submerged plants are interplanted in the mixed planting zones. Due to the stereoscopic plant configuration of the composite surface flow wetland system, the solar radiation can be effectively utilized, the plant photosynthesis in unit area can be improved, the habitat for growth can be enlarged, the redox capability of a wetland substrate can be improved, the purifying efficiency of the surface flow type artificial wetland can be improved, and the engineering construction and operation costs can be saved.

The invention discloses a rapid expanding growth method of a silicon carbide single crystal, belonging to the technical field of semiconductor crystal growth. The invention aims to solve the problem that rapid expanding of silicon carbide single crystals cannot be better realized on the premise of ensuring crystallization quality in the prior art. According to the method, a silicon carbide singlecrystal material with a certain thickness is used as a seed crystal, the circumferential surface of the silicon carbide single crystal is polished through a curved-surface chemical mechanical polishing technology so as to realize lateral expanding growth, and a growth component flow guide plate is arranged in a crystal growth cavity and silicon carbide powder and used for controlling the silicon carbide single crystal to preferentially perform expanding growth and then perform axial growth; and a metal or alloy compound material with high temperature resistance, corrosion resistance and a lowradiation coefficient is adopted to for coating treatment of a surface layer and an internal structure material of the growth cavity, so nucleation growth of silicon carbide on the surface of the growth cavity can be inhibited, the formation of polycrystals is effectively suppressed, and the situation that the silicon carbide single crystal encounters generated parasitic polycrystals in the expanding process and stops expanding is effectively prevented.

The invention relates to a bipolar plate of a proton exchange membrane fuel cell, in particular to a metal bipolar plate stamping with plate materials, comprising a metal positive single-polar plate and a metal negative single-polar plate which are respectively provided with a common channel for oxidizers, a common channel for reducer and a common channel for cooling media. A water frame is arranged between the positive single-polar plate and the negative single-polar plate. A metal stretch net serving as a cooling water flow field is arranged inside the water frame. The edges of the common channel for oxidizers, the common channel for reducers, the common channel for cooling medium, the positive single-polar plate and the negative single-polar plate are all turned outside with cylindrical bumps. The invention greatly improves the effective use area and use rate of the bipolar plate.

The invention provides a mould of a polyurethane sheet which is high in effective use rate, high in polishing efficiency and stable in polishing modular surface. The polishing grinder comprises a polishing base mode on which the polyurethane sheet is adhered, and the polyurethane sheet is small wafers or small semi-wafers. Since the small polyurethane wafers or small semi-wafers are used for adhering the polishing grinder, the effective use area of the whole polyurethane sheet can be increased, the cost of the polyurethane can be saved, the use rate is improved by 20% in comparison with the traditional polyurethane sheet; since the small polyurethane wafers or small semi-wafers have big gas and are uniformly arranged, a polishing solution can easily enter each place of the polishing grinder to inhibit the generation of passivation condition and maintain the cutting force; the polishing grinder can sufficiently intake the polishing solution, and the pressure born by parts is increased under the same condition; and therefore, the cutting force is strong, the polishing efficiency is greatly improved and is more than 30% higher than the traditional form.

The invention discloses a laser radar device-based vehicle appearance measuring method, a laser radar device-based vehicle appearance measuring apparatus and a device. The method includes the following steps that: a laser radar device comprises a first bracket, a first laser radar, a second bracket and a second laser radar, wherein the first laser radar, based on a preset scanning radius inside aparking lot, automatically scans the information such as the width and length of a vehicle when the vehicle enters a scanning area corresponding to the scanning radius, so as to measure the width, length and other information of the vehicle, and the second laser radar automatically measures the information such as the wheel diameter and wheelbase of the vehicle when the vehicle enters the scanningarea corresponding to the scanning radius, so as to measure the wheel diameter, the wheelbase and other information of the vehicle. With the laser radar device-based vehicle appearance measuring method, the laser radar device-based vehicle appearance measuring apparatus and the device of the invention adopted, the measurement of the appearance of the vehicle can be realized by the two laser radars; a small area is just occupied, so that the effective utilization area of the parking lot is improved; and procurement costs and maintenance costs are low.

The invention discloses a coil-type filter membrane assembly. The coil-type filter membrane assembly comprises a central pipe and a filter element wound on the central pipe, wherein the filter element is formed by repeatedly stacking a continuous single diaphragm formed by successively laminating guiding cloth, a filter membrane and a grid, one end, which is provided with creases, of the stacked article is successively adhered onto the central pipe, and the creases are parallel to the central pipe. The invention also discloses a manufacturing method of the coil-type filter membrane assembly. The coil-type filter membrane assembly is stable in structure, simple in production process, high in yield and convenient for automatic production.

A method for performing the oxydehydrogenation of ethylbenzene by using carbon nanofibers loaded on the surface of carbon foams as a catalyst, and belongs to the technical field of the inorganic nonmetallic carbon material science. The method is to use the carbon nanofibers loaded on the surface of carbon foams as a catalyst in the oxydehydrogenation reaction of ethylbenzene, wherein the conversion rate of ethylbenzene is up to 26%, the selectivity is up to 74% and the method shows excellent stability. The method is characterized in that the technology is simple, the production cost is low, the method is environmentally-friendly, the pressure of the catalyst bed is reduced, and the catalyst is easy to separate and recycle, etc.

The invention provides a MEMS microphone. The MEMS microphone comprises a substrate with a vocal cavity, back polar plates fixed on the substrate and vibration films which are arranged oppositely to the back polar plate alternately to form capacitive structures, wherein the back polar plate comprises a back plate and a fixed electrode; the vibration film comprises an effective vibration part and an invalid vibration part; the effective vibration part comprises a vibration body arranged oppositely to the vocal cavity and a fixed arm that is extended by the vibration body and fixed on the substrate; the parts of the vibration body and the fixed arm which are opposite to the vocal cavity form an effective vibration area; the invalid vibration part is located between two adjacent fixed arms and is arranged at intervals with the effective vibration part; the invalid vibration part is at least partially fixed on the substrate; the fixed electrode is the same as the shape of the effective vibration area. Compared with the related technology, the MEMS microphone provided by the invention has better acoustic performance.

A nano-sieve for filtering the nanoparticles is composed of an aluminium oxide membrane with regularly arranged nano-hole mesh structure and a membrane holder with peripheral side wall.

The invention discloses a conformal liquid crystal optical phased array antenna and a wave control method and device thereof, is applied to the fields of free space laser communication, laser radar and the like, and solves the problems that an existing planar liquid crystal optical phased array antenna is narrow in view field range, large in influence on the aerodynamic performance of the surfaceof an aircraft, limited in antenna area, low in antenna installation flexibility and the like. The core device of the conformal liquid crystal optical phased array antenna adopts a conformal design scheme to form the conformal liquid crystal optical phased array antenna so that a larger angle coverage range be achieved, and the influence of the antenna on the aerodynamic performance of a communication terminal can be reduced. The conformal liquid crystal optical phased array has a large beam scanning range and can achieve wider airspace angle coverage.

The invention relates to a terminal structure of a metal oxide semiconductor field effect transistor (MOSFET). The terminal structure comprises an N-type cut-off ring and further comprises a first P-type low-doped region and a second P-type low-doped region, wherein the first P-type low-doped region and the second P-type low-doped region are formed between the cut-off ring and an active region through ion implantation, the implantation dose ranges from 1.5*10<11>/cm<2> to 2*10<13>/cm<2>, implantation energy ranges from 20 kilo electron volts to 80 kilo electron volts, the first P-type low-doped region is closer to the active region than the second P-type low-doped region, and the length of the first P-type low-doped region is smaller than that of the second P-type low-doped region. The invention further relates to a manufacturing method of the terminal structure of the MOSFET. The two P-type low-doped regions are adopted for reducing a surface electric field and increasing the breakdown voltage of the MOSFET, the terminal structure replaces a traditional terminal structure with a plurality of voltage dividing rings, the terminal size is greatly reduced, the effective use area of a chip is increased, and parameters of the chip are more excellent under the same area.

The invention discloses a circuit protection device, which includes: a positive temperature coefficient heat-sensitive material layer, which consists of a first face and an opposite second face, as well as a first end face and an opposite second end face, with the first face comprising a first area adjacent to the first end face and a second area adjacent to the first area, and the second face comprising a third area adjacent to the second end face and a fourth area adjacent to the third area; a first electrode layer, which covers the first area; a second electrode layer, which covers the third area; a first terminal electrode, which is located on the first end face and is connected to the first electrode layer; a second terminal electrode, which is positioned on the second end face and is connected to the second electrode layer; a first insulation layer, which covers at least a part of the second area and at least a part of the first electrode layer so as to isolate the first electrode layer and the second terminal electrode; and a second insulation layer, which covers at least a part of the fourth area and at least a part of the second electrode layer so as to isolate the second electrode layer and the first terminal electrode.

The invention discloses a photographing device-based vehicle appearance measuring method and device and equipment. The method comprises steps: a first camera calibrates a photographing position; a second camera calibrates the photographing position; first photographing information is obtained when the first camera photographs the vehicle; second photographing information is obtained when the second camera photographs the vehicle; the first camera calculates and obtains the size information of the side of the vehicle, the front outer side of the vehicle and the rear outer side of the vehicle based on the first obtained photographing information; and the second camera calculates and obtains the size information of the side of the vehicle, front and rear wheel diameters and the vehicle wheelbase based on the second obtained photographing information. Through the above mode, measurement on the vehicle appearance can be realized through two cameras, the occupied area is small, the effectiveutilization area of a parking lot is improved, the purchasing cost and the use and maintenance cost are low.

The invention discloses an enhancing system for cruising power of a solar hybrid electric vehicle. The enhancing system comprises a pressure regulator, a charging controller, a damper generating device, a high-power generator and front, ceiling and rear solar panels, wherein one end of the pressure regulator is connected with the charging controller while the other end is respectively connected with the damper generating device, the high-power generator and the front, ceiling and rear solar panels. The enhancing system disclosed by the invention is smart and reasonable in design; the solar energy can be utilized to continuously supply electric power to the hybrid electric vehicle, so that an accumulator can be continuously charged in a driving or parking process; and the damper generating device is used for converting the upper and lower vibration mechanical energy generated in the driving process of the hybrid electric vehicle into electric power, and the high-power generator is utilized to supplement electric energy by utilizing the residual electric power, so that the reasonable utilization of the energy is realized, the purpose of increasing the electrical driven cruising power is achieved, the energy utilization ratio is effectively promoted, the environment is protected, the energy is saved, and thus the enhancing system can be widely popularized and applied.

The invention relates to a construction method based on a shield method for an anti-seepage anticorrosion sewage pipe segment lining. The method comprises the following steps that (a) holes in shield segments and gaps between the segments are blocked through epoxy resin; (b) the inner cambered faces of the shield segments are polished to expose inner pores of the shield segments; and (c) polyaniline/epoxy resin mixed coating is sprayed on the inner cambered faces of the shield segments and cured to form protecting coatings. Through the construction steps of epoxy resin blocking, shield segment inner cambered face polishing and protecting coating forming through curing, the construction process is more economical, simpler and rapider, the effective utilized area in pipes is increased, flow resistance of the coatings to sewage is smaller, and the pollution discharge speed is increased. In addition, the protecting coatings have excellent film-forming performance and corrosion resistance and can effectively resist corrosion of acid, alkali and salts in the sewage pipes to the reinforced concrete segments.

The invention discloses an edge etching process applied to a polycrystalline silicon solar cell. The edge etching process applied to the polycrystalline silicon solar cell is used for replacing back etching processing steps currently used in a manufacturing process of the polycrystalline silicon solar cell. The implementation method includes that edges of piled silicon slices are handled in an atomized mode, etching slurry for handling of atomizing is compound slurry which can corrode silicon and silica. The atomized piled silicon slices are put into a sintering furnace to be handled in an etched mode so that the etching slurry and the piled silicon slices react fully. By utilization of the edge etching process, the etching width can be about 50 microns, the effective utilization area of a PN junction is enlarged, and the risk of using strong-corrosiveness acid is avoided.