72results about How to "Reduce potential energy" patented technology

The invention provides a pitting field and hedgerow combined farming mode and a structure thereof. According to the invention, the upper and lower edges of a slope-surface land parcel are provided with permanent slope-protecting ridges; gutters are dug at the outer sides of the ridges and at the left and right sides of the slope-surface land parcel; the gutters are interconnected to form a slope-surface gutterway; horizontal interception ditches with equal altitude are dug in the interior of the slope-surface land parcel from top to bottom according to critical slope length which leads to rill erosion, so the slope-surface land parcel is divided into a plurality of farming districts with equal length; ridges and furrows are constructed along slope direction in the farming districts; the downslope furrows, the interception ditches with equal altitude and the slope-surface gutters are communicated to form a slope-surface water drainage network; downslope furrow pitting field earth ridges and equal-attitude interception ditch pitting field earth ridges are constructed in the downslope furrows and the interception ditches at same intervals, thereby forming downslope furrow pitting fields; and cross slope ridges with equal altitude are constructed at the middle parts of the farming districts, and water-retaining plants are planted on the ridges to form ridge hedgerow. The combined farming mode provided by the invention has the advantages of simple operation, low cost and substantial control effect on water and soil loss.

PCT No. PCT/JP96/03783 Sec. 371 Date Jun. 24, 1998 Sec. 102(e) Date Jun. 24, 1998 PCT Filed Dec. 25, 1996 PCT Pub. No. WO97/23554 PCT Pub. Date Jul. 3, 1997A microporous film comprising a high-density polyethylene and a linear copolymer polyethylene and having a terminal vinyl group concentration of 2 or more per 10,000 carbon atoms in the polyethylene, as measured by an infrared spectroscopic method.

The present invention relates to a waterborne polyurethane emulsion. During preparation of the waterborne polyurethane emulsion, raw materials comprise an organosilicon polyol and modified silicon nanoparticles capable of reacting with hydrophilic groups in polyurethane molecular chains, so that the waterborne polyurethane molecular chains are introduced into reactive organosilicon and the modified silicon nanoparticles. The preparation method comprises the following steps: during preparation of a polyurethane prepolymer, taking an isocyanate and polyol as raw materials, and carrying out a reaction in the presence of a catalyst and a chain extender to obtain the polyurethane prepolymer, wherein the polyol contains at least one organosilicon polyol; and during preparation of the waterbornepolyurethane emulsion, mixing the polyurethane prepolymer with a water solution containing the modified silicon nanoparticles for emulsification to obtain the waterborne polyurethane emulsion. Compared with an existing mode of adding a filler by physical mixing to modify the waterborne polyurethane resin, the method provided by the invention has the advantages that water resistance/solvent resistance, low-temperature flexibility and wear resistance of the waterborne polyurethane resin can be improved, and retention timeliness of the excellent performance is longer.

The invention discloses a method for measuring permeability coefficient of oral drugs by using a hollow fiber membrane. The method comprises the following steps: (1) preparing a receptor solution; (2) preparing a donor solution; (3) immersing a hollow fiber membrane tube with one end sealed in a lecithin solution and taking out the tube; (4) connecting an open end of the hollow fiber membrane tube treated in the step (3) with a connecting pipe; (5) adding the receptor solution into the treated hollow fiber membrane tube through the connecting pipe; and (6) immersing the hollow fiber membrane tube with receptor solution in a container with donor, wherein the receptor solution surface is lower than the donor solution surface; and permeating for 0.55 h, sampling from the receptor solution, determining drug concentration in the receptor solution, and calculating permeability coefficient. The invention has advantages of simple device, easy installation, fast test preparation, rapid analysis and high efficiency; besides, advanced detection equipment is employed to achieve high-throughput determination of drug permeability coefficient, so as to adapt to requirements of high throughput drug screening and realize wide scope of drug application.

Disclosed is a gallium nitride-based light emitting diode structure. The gallium nitride-based light emitting diode structure comprises a substrate, a bottom layer, an N type layer, a light emitting layer and a P type layer in sequence; the gallium nitride-based light emitting diode structure is characterized in that the P type layer consists of an electron barrier layer, at least one energy band deformation layer and a hole injection layer; the energy band deformation layer is inserted in the electron barrier layer or positioned between the electron barrier layer and the hole injection layer, or inserted in the hole injection layer or positioned on the hole injection layer; and the energy band deformation layer is a non-P type layer with carbon impurity content of not greater than 5*10<16>cm<-3>. By virtue of the low carbon impurity content, the energy band of the energy band deformation layer can be bent, and the two-dimensional hole gas concentration on a contact interface between the energy band deformation layer and the adjacent layer can be increased.

The invention discloses a debris flow formation tunnel excavation construction method. The method comprises the following steps that S1, geological conditions nearby a tunnel face are detected, and the position and scope of a debris flow cavity on a to-be-excavated tunnel main hole path are determined; S2, an energy-releasing and pressure-reducing hole is formed nearby the debris flow cavity and is made to meet process conditions for releasing debris flow potential energy of the debris flow cavity; S3, the debris flow cavity is opened by means of the energy-releasing and pressure-reducing hole, the debris flow potential energy in the debris flow cavity is released, and the energy-releasing and pressure-reducing hole is closed after the potential energy is released; S4, a circuitous guide hole is formed in one side of a tunnel main hole, and a plurality of working faces are formed on the to-be-excavated tunnel main hole path; and S5, the rest of the tunnel main hole is constructed. The invention further discloses a debris flow formation tunnel excavation construction structure. By means of debris flow cavity characteristics, the high-pressure potential energy in the debris flow cavity is fully released in advance, and safety of construction in front of the tunnel face is guaranteed.

The invention discloses a high-luminous efficiency light emitting diode epitaxial slice and a preparation method thereof and belongs to the light-emitting diode field. The high-luminous efficiency light emitting diode epitaxial slice includes a substrate as well as a u type GaN layer, an n-type GaN layer, a multiple-quantum well active layer, a P-type AlGaN layer and a P-type GaN carrier layer which cover the substrate sequentially, wherein the multiple-quantum well active layer includes a plurality of InGaN well layers and a plurality of Gan barrier layers which grow alternately, and the P-type AlGaN layer includes a first P-type AlGaN sub layer, a u type GaN sub layer and a second P-type AlGaN sub layer which cover the multiple-quantum well active layer sequentially. According to the high-luminous efficiency light emitting diode epitaxial slice, potential energy required by holes in the P-type GaN carrier layer to climb over the P-type AlGaN layer can be decreased; quantum states can be formed in the u type GaN sub layer; holes in the P-type GaN carrier layer, of which the potential energy is lower than the potential energy for climbing over the P-type AlGaN layer, can tunnel the u type GaN sub layer through the quantum tunneling effect, and can be further transmitted into quantum wells, and therefore, hole concentration in the multiple-quantum well active layer can be improved.

An external fixation clamp for receiving a fixation element includes an inner jaw and an outer jaw movable between an open position that permits the fixation element to be placed between the inner and outer jaws and a closed position that restricts removal of the fixation element from between the inner and outer jaws. A latch assembly may cooperate with the inner and outer jaws to secure the jaws in a closed position. The latch assembly may comprise a latch and a latch biasing member. The latch may be configured to translate linearly relative to one of the inner and outer jaws, and the latch biasing member may have a first higher level of stored energy when the inner and outer jaws are in the open position and a second lower level of stored energy when the inner and outer jaws are in the closed position.

The invention discloses a research method for the influence of the base support rigidity gradient change on the friction force. Comprises the following steps: step 1, establishing a molecular dynamicsmodel. The model system consists of a square graphene sheet adsorbed on the tip of a simulated atomic force microscope probe and a monolayer graphene substrate supported by a rigidity gradient. Step2, the effect of the stiffness gradient on the average friction force of graphene. As the stiffness increases, the friction energy consumption decreases. When the stiffness exceeds a certain criticalvalue, the friction force does not decrease any more. Step 3, the influence of stiffness gradient on the normal load. When the bracing stiffness is large, the normal deformation of the substrate is small, the distance between the sheet and the substrate is small, and the Van der Waals force between layers is large. Step 4, the internal mechanism of the influence of the stiffness gradient on the friction force. The friction force is caused by the potential gradient of the interface barrier and the thermal vibration of the atoms with different stiffness, and the boundary barrier caused by the asymmetric deformation of the atoms on both sides of the boundary transition zone and the sudden change of the degree of freedom constraint.

The invention discloses an SLGT2 inhibitor granule and a preparation method thereof. The SLGT2 inhibitor granule comprises an SLGT2 inhibitor, a crystal inhibitor and a filler, of which the mass ratio is 10: (0.5-10): (0.5-20), preferably 10:(1-5):(1-15). The SLGT2 inhibitor is any one component selected from the group consisting of Invokana, Dapagliflozin and Empagliflozin. An organic solution containing the SLGT2 inhibitor, the crystal inhibitor and the filler is formed and is spray-dried to be prepared into the granule. The granule has good mobility, strong compressibility and less dust, and can be further prepared into preparations such as tablets, capsules and granules, and the problems that the dissolution and the bioavailability are low due to the poor water solubility of the SLGT2 inhibitor are solved.

The invention discloses a pixel structure of a CMOS image senor and a forming method thereof. The pixel structure of the CMOS image senor comprises a semiconductor substrate, a transmission transistor located on the semiconductor substrate, a photodiode located inside the portion, at one side of a gate structure, of the semiconductor substrate and a floated diffusion area located inside the portion, at the other side of the gate structure of the semiconductor substrate,, wherein the transmission transistor comprises the gate structure located on the semiconductor substrate, the photodiode comprises a deep doped area, and the concentration distribution of impurity ions doped in the deep doped area decreased along with the increase of the distance between the deep doped area and the gate structure. According to the pixel structure of the CMOS image senor, photoelectrons can be transmitted to the floated diffusion area easily, and the imaging quality is high.

The invention discloses a garbage conveying channel for an elevator well. The garbage conveying channel comprises a pipeline mechanism and a one-way conveying mechanism; the pipeline mechanism comprises conveying pipelines, a garbage feeding hopper and a garbage discharging hopper, and the garbage feeding hopper and the garbage discharging hopper are arranged on the outer side surfaces of the conveying pipelines; a plurality of sections of conveying channels are provided and are arranged in an up-and-down overlapping manner; the garbage discharging hopper is arranged at the bottom of the bottommost conveying channel; and the one-way conveying mechanism comprises a resistance mechanism, a ratchet mechanism, a transmission mechanism and a stirring mechanism. The garbage conveying channel forthe elevator well is arranged in an elevator shaft, realizing the conveying of the garbage on the floors without the need of manual carrying, greatly reducing the labor intensity of workers, maintaining high garbage conveying efficiency and effectively preventing the garbage in corridors from being accumulated.

The invention discloses a debris flow drainage and guide structure. The debris flow drainage and guide structure comprises a mountain body, a flow blocking mechanism arranged on the slope of the mountain body and a flow guide mechanism arranged at the bottom of the mountain body, wherein the flow blocking mechanism comprises at least two side walls perpendicular to the mountain body, and the sidewalls are anchored to the mountain body; and a plurality of inwards-concave energy dissipation grooves are transversely formed between the adjacent side walls. According to the debris flow drainage and guide structure, debris flow is blocked through the flow blocking mechanism, so that the potential energy of the sliding down of the debris flow is reduced, and the purpose of reducing the flow speed of the debris flow is achieved; then the debris flow sliding down from the flow blocking mechanism is guided to the designated positions on the two horizontal sides through the flow guide mechanism,and thus the destructive damage of the debris flow to building facilities or engineering facilities below the mountain body is avoided; and the energy dissipation grooves, blocking piles and blockingframes are adopted, the debris flow is better blocked under the triple measures, the potential energy and speed of the sliding down of the debris flow are reduced to the maximum extent, and the destructive damage of the debris flow to the building facilities and the engineering facilities below the mountain body is avoided.

The invention provides a swing type check valve with valve clacks. The swing type check valve comprises a valve body, the valve clacks and springs with the number from one to n. The n valve clacks are arranged, one sides of the n valve clacks are connected in the valve body through rotating assemblies, and the n valve clacks are arranged around a bottom hole. The springs with the number from one to n are in one-to-one correspondence with the valve clacks. One ends of the springs with the number from one to n are connected with the corresponding valve clacks, and the other ends of the springs with the number from one to n are connected with the inner wall of the valve body. Elastic coefficients of the springs with the number from one to n are different from one another, and n is a natural number larger than or equal to 2. The swing type check valve with the valve clacks has the following beneficial effects that a one-way transportation function of fluid is achieved through opening and closing of the multiple valve clacks which are stacked in sequence. The swing type check valve is suitable for large-caliber pipelines. The farthest distance of the valve clacks rotating around a valve rod is small, potential energy generated by the valve clacks is smaller, impacts on the valve body are smaller, and the service life is longer. The closing speed of the valve clacks is higher, and the back flowing amount generated due to closing is smaller.

The invention relates to the technical field of Bayer process production of aluminum oxide, in particular to a U + Z type seed precipitation tank and a working method thereof. Through a U + Z type configuration scheme, the distance between the seed precipitation tanks is shortened as much as possible, and the head tank and the tail tank of a decomposition tank face one direction, so that on one hand, the occupied area is saved, the length of a chute between the seed precipitation tanks is shortened, and the average basic height of the seed precipitation tank is reduced; and on the other hand,the feeding and discharging direction of the seed decomposition process is adjusted to one direction, so that the pipe network length and the slurry conveying energy consumption are reduced.

The invention discloses a side slope protection drainage structure of an asphalt road. The side slope protection drainage structure comprises frame assemblies laid on the slope surface of the side slope, a plain soil layer, a concrete layer and a gravel layer are sequentially laid in the frame assemblies from bottom to top, and the each frame assembly comprises two symmetrically-arranged anti-collapse frames; the anti-collapse frames comprise side plates perpendicular to the slope surface of the side slope, protruding parts formed on the side plate and protruding towards one side of the side plates, upper edge sections formed between one end of the protruding parts and the side plates, and lower edge sections formed between the other end of the protruding parts and the side plates; and thetwo protruding parts in each frame assembly are opposite in protruding direction, the multiple sets of frame assemblies are arranged, the protruding parts in every two adjacent frame assemblies abutagainst each other, the length direction of each side plate is consistent with the inclination direction of the slope surface of the side slope, and first drainage holes are formed in the upper edge section and the lower edge section. According to the side slope protection drainage structure of the asphalt road and the construction method thereof, water and soil loss of the side slope can be reduced, and safety of vehicles on the asphalt road is guaranteed.

The invention discloses an anti-abrasion uniform coal feeding device for a circulating fluidized bed. The problems of how to reduce impact and abrasion of coal particles on a uniform coal feeding pipeand how to reduce the too high concentration ratio when the coal particles enter a hearth are solved. A coal conveying air pipe (2) communicates with an upper port of a uniform coal feeding pipe (4),the cross section of an inclined downward pipe section (8) is gradually changed from round to oval, the cross section of a horizontal pipe section (9) is round, and the cross section of the uniform coal feeding pipe (4) is oval; a coal conveying air flow deflector (3) is arranged at the communication position of a coal falling pipe (1) and the uniform coal feeding pipe (4), and the coal conveyingair flow deflector (3) seals an upper half inner cavity, above a coal falling opening, of the uniform coal feeding pipe (4); and a uniform coal spreading air pipe (6) and a circular coal spreading air pipe (5) are arranged at the communication part of the uniform coal feeding pipe (4) and a water cooling film type wall (7) in a hearth, and coal particles are fully combusted, and the carbon content of bottom slag is reduced.

The invention relates to a microwave source device in the field of high-power microwaves, in particular to a metamaterial-based low-frequency-band slow wave structure which comprises a first metamaterial resonance unit, a second metamaterial resonance unit and a circular waveguide. The first metamaterial resonance unit and the second metamaterial resonance unit are in 45-degree rotation coupling arrangement to form a single period of the slow wave structure. The metamaterial-based low-frequency-band slow wave structurehas the following technical advantages that the metamaterial-basedslow wave structure can work below the cut-off frequency of the hollow metal circular waveguides with the same size, and has the advantage of transverse miniaturization; due to the sub-wavelength characteristic of the metamaterial, the slow wave structure is shorter in period and has the advantage of miniaturization in the axial direction; due to the local field enhancement effect of the metamaterial-based slow-wave structure, the slow-wave structure has higher coupling impedance, and a device has the advantage of higher beam-wave interaction efficiency; strong electromagnetic coupling between metamaterial slow wave structures is stronger in relativistic electron beam modulation, so that the device has shorter oscillation starting time.

Provided is a metering hollowware for anode casting capable of reducing anodes' sizes in particular the architraves, prolonging service life of casting molds, and depressing casting adsorption of liquid injection port at frontend of metering hollowware. The metering hollowware for anode casting (10) used for metering specified amount of molten solution for liquid injection into casting molds (3) is characterized in that a downcomer plate protruding forwards and toward the slanting-down direction is set at the lower side of the liquid injection port (13a) for making the molten liquid accumulated at the dropsy part (11) flow to casting molds (3).