90results about How to "Increase injection rate" patented technology

The invention provides a light-emitting diode with a novel P-type electron barrier layer structure and a growth method. The LED epitaxy structure of the light-emitting diode comprises a substrate, a low-temperature GaN buffer layer, a GaN non doping layer, an N-type GaN layer, a multiple quantum well layer, a low-temperature GaN layer, a P-type InAlGaN electron barrier layer, a high-temperature P-type GaN layer and a P-type contact layer which are sequentially arranged from bottom to top. According to a P-type InyAlxGal-x-yN electron barrier layer of the composite structure, In components are added, and the InyAlxGal-x-yN lattice constant is adjusted, so that lattice matching between the P-type GaN layer and the multiple quantum well layer can be achieved, dislocation density is reduced, lattice quality is improved, and expected energy band gap value and energy band drift rate are obtained. Consequently, electron leakage is effectively reduced, and the injection rate of holes is improved. Moreover, a gradually-changing structure of the P-type InAlGaN drift rate is designed, and the restriction to hole vertical migration is avoided, so that the injection efficiency of holes is improved, and the light-emitting efficiency of a GaN-based light-emitting diode is further improved.

The invention provides a miniflow control chip which has a simple structure and can continuously analyzing single-cell contents at high speed and an operation method. The invention is characterized in that a sheath flow passageway is arranged at each side of a sample injection passageway of a cross-miniflow control chip; through adjusting static pressure difference between liquid storage tanks, cell suspension and sheath flow liquid simultaneously flow out of a sample reservoir and a sheath flow liquid reservoir; under the action of sheath flow, single cells in the cell suspension rank in a row to enter into a separation passageway from the sample injection passageway in turn, contact with a film dissolving agent in the process of movement and conduct rapid film dissolution at the inlet of the separation passageway; the film-dissolved cell contents fully enter into the separation passageway to be continuously separated at high speed under the action of an field stress generated at two ends of the separation passageway; and laser induces fluorescence detection. As the solution entering into the separation passageway is a mixed solution of the sheath flow liquid and normal saline in the cell suspension, the invention can also greatly reduce the concentration of the normal saline entering into the separation passageway and markedly lower band broadening caused by Joule heat when electrophoresis is carried out.

The invention discloses a composite material with a foam sandwich structure and a preparation method of the composite material. The composite material comprises an upper surface layer, a lower surface layer and a foam sandwich layer which is located between the upper surface layer and the lower surface layer; the upper surface layer and the lower surface are formed by overlapping layered fiber fabrics; the foam sandwich layer is formed by arranging a plurality of foam strips, foam plates or foam blocks; parallel sheet-like fiber fabrics are clamped between two adjacent foam strips or adjacent foam plates of the foam sandwich layer; the surfaces on the middle positions of each two foam strips are provided with resin grooves which are parallel with the surface layers; and the resin grooves are crossed with a resin make-up groove which is penetrated in the complete foam sandwich layer in the longitudinal direction; the upper surface layer, the lower surface layer and the sandwich layer are sewn into a complete structure by a sewing rough yarn. The composite material provided by the invention is light in weight and has high strength; the preparation process is simple and the composite material can be molded in one step; and moreover, resin can be injected from the middle layer of the sandwich layer and the injection speed is improved.

The invention discloses a light emitting diode with an electronic barrier layer structure. The forbidden band width and lattice constant of a quaternary nitride InxAlyGa1-x-yN can be independently adjusted, the In and Al ingredients in p-InxAlyGa1-x-yN are adjusted to match with the lattice between GaN in a binary nitride or a ternary nitride or a InGaN/GaN multi-quantum well and the GaN in a p type GaN epitaxial layer so as to obtain high energy band gap value and energy band offset ratio, effectively reduce the electron leakage rate and improve the injection efficiency of holes, thereby greatly improving the light emission efficiency and ESD yield of LED devices.

A natural gas production system prevents liquid accumulation in the wellbore and minimizes friction loading in the wellbore by maintaining production gas velocity above a critical minimum velocity. A pressurized gas is injected into the well to supplement the flow of production gas such that the velocity of the total gas flow up the well exceeds the critical velocity. A choke is fitted to the gas injection line, and total gas flows are measured by a flow meter. A flow controller compares the measured total gas flow rate against the critical flow rate, and determines a minimum gas injection rate required to maintain the total gas flow rate at or above the critical flow rate. The flow controller then adjusts the choke to achieve the desired gas injection rate. The injection gas may be recirculated production gas from the well, or a gas from a separate source.

A fuel injection valve coupled to a common rail is provided. When fuel injection is carried out, the fuel pressure in the fuel injection valve pulsates. An interval between a pilot injection and a main injection is set so that the main injection is carried out at a zero gradient timing as a timing when the gradient of the fuel pressure in the fuel injection valve after the pilot injection is approximately equal to zero. Owing to a fuel injection control apparatus and a fuel injection control method for an internal combustion engine that perform the above-mentioned control, the fuel injection amount for the subsequent fuel injection following the preceding fuel injection can be reliably held equal to a normal amount.

The invention discloses a weak-plane rock side slope grouting method and an anchor pipe for grouting. An anchor hole is drilled; the diameter of the anchor hole is more than the outside diameter of the anchor pipe body of at least 100 mm; the anchor pipe is placed in the anchor hole; concrete is filled in the anchor hole mouth; suspended grout in a double layer stirring mill is pressed to the anchor pipe for grouting by a grouting pump; when the grouting flow rate is more than the flow rate of grout absorption by rock or the grouting pressure is larger than the shearing resisting intensity of fissure filling in a shallow layer rock body, a grout returning valve is started in order that the grout in the hole returns to a grout storage barrel of the double layer stirring mill for circulating grouting. The weak-plane rock side slope grouting method and the anchor pipe for grouting effectively solve the difficult problems that the prior pressing in type grouting is easy to leak the grout, can not completely fill the fissure and can not be suitable for reinforcing the shallow layer. The circulating grouting method of the invention enlarges the grouting scope, improves the injection rate by the single hole, can effectively reinforce the water seepage and corrosion resisting capacity in the interlayer of the side slope and improve the stabilizing capacity of the whole side slope. The anchor pipe of the invention has the advantages of simple structure, easy manufacture and low costs.

A method is given for fracturing a formation, in particular far-field in a tight formation, in which at least a portion of the proppant is crushable in situ at some point during pumping, during fracture closure, or at higher Fluid flow stresses experienced later during fracture closure. The closure stress or hydrostatic stress is estimated, then a proppant is selected that is at least partially crushable at that closure stress, and then the fracturing treatment is performed with at least a portion of the total proppant being the selected crushable proppant.

The invention discloses a quantum dot surface purification method for improving the luminous efficiency of a perovskite LED. The method comprises the steps of: (1) adding a flocculant to a CsPbX3 quantum dot solution, carrying out centrifuging and then taking sediments; (2) dispersing the sediments into an organic solvent, adding a purification solvent, carrying out centrifuging again and taking the sediments; and (3) dispersing the sediments obtained in the step (2) into the organic solvent again and obtaining purified CsPbX3 quantum dots. Surface purification is carried out on the perovskite quantum dots by screening different solvents and cycle indexes; the number of ligands on the surfaces of the quantum dots is reduced; and the charge injection rate can be improved while the photoluminescence quantum yield is ensured, so that an QLED with high luminous efficiency is obtained; the photoluminescence quantum yield of the purified QLED is kept over 90%; and the external quantum efficiency is improved to 3.2% from 0.9%.

The disclosure is related to preparing a sample for chemical analysis by evaporating at least a portion of solvent included in the sample. After depositing the sample into a sample container, in some examples, at least a portion of the solvent can be evaporated. Solvent evaporation can be achieved at room temperature, at an elevated temperature, at atmospheric pressure, or by drawing a vacuum in the sample container, for example. The one or more compounds of interest can pass through a sample delivery port on the sample container into the chemical analysis device for analysis, for example. Preliminary reduction or elimination of the solvent can increase the overall amount of compounds of interest delivered into the chemical analysis device, for example. In some examples, when extra sensitivity may not be needed, less solvent can be used, which can result in a greener analytical technique that is better for the environment.

The invention provides a wire dividing plate of a cold cast anchorage, which comprises a wire dividing plate main body. The wire dividing plate main body is a plane; a screw hole is arranged at the center of the wire dividing plate; six lines of holes arranged in a straight line and six groups of holes in regular triangle arrangement are evenly distributed along the circumference of the screw hole in a radial manner; and the straight-line holes and the regular triangle hole groups are alternately arranged. The wire dividing method includes the following steps of: bundling semi-parallel steel wires into a regular hexagonal or chamfer hexagonal shape in tight arrangement; in the wire dividing process, inserting an awl along the interlayer of a steel wire bundle, then inserting three rows of thin steel wires with appropriate diameter, wherein the angle between every two rows of thin steel wires is 120degrees; replacing the two thin steel wires at the middle of each row of steel wires with thick steel wires, adjusting the axial positions of the thin and thick steel wires so as to enable the tips of the steel wires to be in arrangement consistent with the holes of the wire dividing plate; buckling the wire dividing plate into the steel wire bundle, jacking the wire dividing plate to an appropriate position through a pipe-jacking for the convenience of upsetting the steel wires, upsetting the steel wires, pulling back the wire dividing plate, and conducting the treatments of sealing, pouring, vibrating and curing. The wire dividing plate has the characteristics of high production efficiency, good anchoring performance and long service life.

A methodology for storing compressed air in porous subterranean formations for subsequent production and use in generating electricity.

The invention relates to a soil body improvement method of rectangular shield construction. The soil body improvement method comprises the following steps of arranging an improved injection hole in each cutterhead spoke of a rectangular shield; carrying out region division on a soil cabin in the rectangular shield to divide the soil cabin into a left region, a right region and an upper region; in the rectangular shield construction, carrying out soil body improvement on foam injected from the improved injection hole; carrying out soil body improvement on bentonite slurry injected from the left region and the right region; carrying out soil body improvement on foam which is continuously injected from the upper region of the soil cabin. The invention provides the applicable soil body improvement method aiming at the rectangular shield construction so that full-section improvement of a cutterhead and the soil body is realized; uniform soil properties and balanced soil pressure in each region are ensured, and the influences on the shield construction by the soil pressure are reduced.

The disclosed system and method concentrates and enriches a chemical sample while removing water and/or CO2 prior to analysis, improving detection limits and repeatability of quantitative chemical analysis without the need for cryogenic or sub-ambient cooling. The system can include a valve system, a dewpoint control zone, and a multi-capillary column trapping system (MCCTS). During a first time period, the valve system can couple the dewpoint control zone to the MCCTS. During a second time period, the valve system can couple the MCCTS to the chemical separation column such the dewpoint control zone is bypassed. Excess water included in the sample can condense in the dewpoint control zone as the sample transfers to the dewpoint control zone and MCCTS. When the sample is transferred from the MCCTS to the chemical separation column, the condensed water in the dewpoint control zone is not transferred to a chemical separation column.

The invention discloses a preparation method of a hydrophobic film with a slidable liquid locked on the surface. Firstly, an amphipathic fluorine-containing block hydrophobic substrate material (PDFHMA-b-PHEMA) is synthesized with an ATRP (atom transfer radical polymerization) method; then, a porous film containing regular micro-nano structures is prepared from the substrate material with a vaporcondensation volatilization method; finally, hydrophobic silicone oil is infused into multiple pores of the surface of the film and a hydrophobic surface with the slidable liquid locked on the surfaceis formed. Next, the performance of the hydrophobic film is explored, and results prove that the slidable liquid locked on the surface can endow the substrate material with good cold resistance. Thehydrophobic film with the slidable liquid locked on the surface is prepared successfully and the film has very good anti-icing and freezing-resistant performance.

The present invention relates to a scanning electron microscope equipped with a back scattered electron detection function, which causes primary electrons generated from a light source to enter a specimen, and after the primary electrons have entered therein, detects emitted electrons which are emitted from the specimen. The scanning electron microscope equipped with a back scattered electron detection function is characterised by comprising: a Wien filter unit, which is arranged between the light source and the specimen, and which separates the emitted electrons into secondary electrons and back scattered electrons by generating a magnetic field and an electric field; and a detecting unit which detects the secondary electrons and back scattered electrons separated by the Wien filter unit. Thus, provided is a scanning electron microscope equipped with a back scattered electron detection function which enables the separation and detection of secondary electrons and back-scattered electrons due to the use of a Wien filter.

The invention relates to the technical field of cosmetic liquid processing, in particular to an emulsifying device for a cosmetic liquid processing production line. The emulsifying device comprises anemulsifying cylinder, flow promoting cylinders are symmetrically arranged on the two sides of the top of the emulsifying cylinder, the bottom ends of the flow promoting cylinders and the emulsifyingcylinder are conical, and the tops of the flow promoting cylinders and the emulsifying cylinder are jointly and fixedly sleeved with a sealing cover; and the bottom of the sealing cover is supported by a supporting frame, a material injection structure is arranged at the top end of the sealing cover at the corresponding position of the emulsifying cylinder, a material discharging structure is arranged at the bottom end of the emulsifying cylinder, and a stirring mechanism is arranged between the emulsifying cylinder and the interiors of the two flow promoting cylinders. The stirring mechanismdesigned by the invention has a repeated stirring function, the stock solution emulsifying effect is ensured, and meanwhile, the two flow promoting mechanisms can be driven to rotate through the arranged linkage mechanism, so that stock solutions falling from the interiors of the two flow promoting cylinders 7 are impacted, and the stock solution emulsifying efficiency is improved.

The invention discloses a muddy soil-cement double-pipe grouting process suitable for a horizontal channel of a pedestrian underground passage in a saturated soft clay area. A large number of indoor orthogonal tests prove that: by adding a variety of composite additives and composite mixtures into the soft soil-cement containing sludge as major ingredient in the Wenzhou city, the compression resistance and the shear resistance of the sludge soil-cement are greatly improved, and patricianly the compression resistance and the shear resistance (3 days to 14 days) are greatly improved, which has great significance in the construction of pedestrian underground passage horizontal channels in urban water-rich soft soil areas. Based on the large number of indoor orthogonal tests, a new formulation of a soft soil reinforcing material is proposed, which is suitable for the shallowly-buried tunneling construction of pedestrian underground passage horizontal channels in water-rich soft soil areas. The pre-grouting method using the new formulation can effectively improve the geological conditions of shallow-buried soil layer of water-rich soft soil and provide a reliable guarantee for the success of the shallowly-buried tunneling construction of pedestrian underground passages.