125results about How to "Reduce uneven distribution" patented technology

A red nitride phosphor of formula (I) or (II), and two green phosphors of formulas (III) and/or (IV) are included.

M_wAl_xSi_yB_zN_{((2/3)w+x+(4/3)y+z)}:Eu²⁺  (I)

M is any of Mg, Ca, Sr and Ba, and 0.5≦w≦3, x=1, 0.5≦y≦3 and 0≦z≦0.5,

M_pSi_qN_{((2/3)p+(4/3)q)}:EU²⁺  (II)

1.5≦p≦2.5 and 4.5≦q≦5.5,

M_xMgSi_zO_aX_b:Eu²⁺  (III)

M is any of Ca, Sr, Ba, Zn and Mn, X is any of F, Cl, Br and I, and 6.5≦x≦8.0, 3.7≦z≦4.3, a=x+1+2z−b/2 and 1.0≦b≦1.9,

Si_cAl_dO_fN_g:Eu²⁺  (IV)

c+d=6, 5.0≦c<6, 0<d≦1.0, 0.001<f≦1, 7≦g<8.

The invention relates to a shaft sealing device with magnetic fluids, which is characterized in that based on an existing shaft sealing device with magnetic fluids mainly comprising a rotating shaft, a non-magnetic metal shell, magnetic poles, a permanent magnet, the magnetic fluids and a rubber ring, sealing pole teeth made of soft magnetic materials are additionally arranged in sealing pole tooth grooves of the magnetic poles, a sealing pole tooth ring is sleeved on the rotating shaft, the inner diameter of the sealing pole tooth ring is 0.1-0.6mm larger than the diameter of the rotating shaft, the outer diameter of the sealing pole tooth ring is 0.1-0.3mm smaller than the inner diameter of each tooth groove, the thickness of the sealing pole tooth ring is 0.1-0.3mm smaller than the width of each tooth groove, the magnetic fluids are distributed in an annular sealing gap between the rotating shaft and the sealing pole tooth ring, and each magnetic pole comprises two half annular magnetic poles. The positions of the sealing pole teeth of the device can be changed radially along the rotating shaft to adjust coaxiality of the rotating shaft and the sealing pole teeth, uneven distribution of the annular sealing gap in the circumferential direction of the rotating shaft is decreased, reduction of the pressure bearing capacity of the device and abrasion of the rotating shaft and the sealing pole teeth are avoided, and the requirements of sealing components on machining and mounting precision are lowered.

The invention discloses fiber aerogel foam concrete, a preparation method and application thereof. The fiber aerogel foam concrete disclosed by the invention comprises the following raw materials: binding materials, aerogel powder, cellosilk, viscous water, a foaming agent and water, wherein the mass ratio of the binding materials to aerogel powder to cellosilk to viscous water is 1: (0.01-0.3):(0.001-0.01):(0.35-1); the particle size of the aerogel powder is smaller than 250 microns, the porosity is 80-99%, and the pore diameter is 10-50nm; the cellosilk is uniformly distributed, and the diameter is 10-50 microns. The fiber aerogel foam concrete disclosed by the invention has the advantages of ultralow density, ultralow heat conductivity and excellent thermal insulation, can be applied tothe fields of thermal insulation of building walls, road filling, barrier sound insulation, and has wide application prospect.

The invention relates to the technical field of lighting equipment, in particular to an LED spotlight with an adjustable lighting effect. The LED spotlight comprises a supporting frame, an LED light source and a secondary optical part, wherein the LED light source is a multi-color-temperature light source, and is arranged on the supporting frame; the secondary optical part is positioned in the light emitting direction of the LED light source, and is arranged on the supporting frame; the secondary optical part comprises a lens assembly and a focusing device used for adjusting the distance between lenses in the lens assembly; and the lens assembly comprises a collimating lens and a Fresnel lens, which are arranged in sequence in the light emitting direction. The LED spotlight with the adjustable lighting effect, provided by the invention, can be applied to occasions with different color temperature and brightness requirements, and has a better lighting effect.

A pressure container 1 composed of a reinforcing layer 2 and a liner layer 3, with a hydrogen charging pressure of 30 MPa or higher; and a hydrogen absorbing material and a carrier for holding said hydrogen absorbing material (hydrogen absorbing material portion 4) contained in the pressure container 1 are included, and a volume fraction X of the hydrogen absorbing material with αm≧100 kg/m³ with respect to an internal volume of the pressure container 1 is 5(%)≦X≦20(%), where am denotes a maximum hydrogen absorption amount per unit volume of the hydrogen absorbing material (kg/m³); X=100 ·Vm/Vi (%); Vi is an internal volume of the pressure container (L); and Vm is a volume of the hydrogen absorbing material in the pressure container (L).

The invention discloses a dispenser, which comprises a shell, a side plate enclosing the shell, a distribution port penetrating the side plate and used for connecting a capillary tube, and a refrigerant pipe communicated with the shell, wherein the diameter of the distribution port is greater than that of the capillary tube, and a reducer pipe is arranged between the distribution port and the capillary tube. A baffle with a through hole is arranged in a cavity, and the baffle disperses a refrigerant while buffering a refrigerant stream in order to realize uniform distribution of the refrigerant. Meanwhile, the diameter of the distribution port is increased, and the reducer pipe is arranged between the distribution port and the capillary tube, so the welding difficulty is reduced, pipe deformation or leakage caused by welding is prevented; meanwhile, by the large-diameter distribution port, the non-uniform distribution of the refrigerant nearby the distribution port is further reduced, so the distribution of the refrigerant inside the capillary tube is improved. The purpose of distributing liquid uniformly is really achieved, so capillary tubes are balanced; moreover, by the structure, the noise is reduced, and the user satisfaction degree is increased.

Methods and systems are provided for treatment of an exhaust stream, comprising nitrogen oxides. The method comprises a first oxidation of compounds comprising one or more of nitrogen, carbon and hydrogen in the exhaust stream; and a control of a first supply of a first additive to the exhaust stream to prevent an accumulation of soot exceeding a soot threshold value in a catalytic filter. This soot threshold value depends at least on operating conditions for the combustion engine, which impact a level of a flow for the exhaust stream. A first reduction of nitrogen oxides is performed using reduction characteristics of a catalytic coating in the catalytic filter and the supplied first additive. Soot particles are caught and oxidized. A control of a second supply of a second additive is performed, following which a second reduction of nitrogen oxides is performed using the first and/or the second additive in a reduction catalyst device.

A light emitting element having; a first and a second conductivity type semiconductor layers, a first and a second electrodes formed on the first and second conductivity type semiconductor layer, the first and the second electrodes being disposed on the same face side of the first conductivity type semiconductor layer and the second conductivity type semiconductor layer, in plan view, the first electrode having a first connecting portion, a first extending portion, and two second extending portions, the second electrode having a second connecting portion and two third extending portions, the first extending portion of the first electrode extending linearly from the first connecting portion toward the second connecting portion, and the two second extending portions extending parallel to the first extending portion on two sides of the first extending portion, the two third extending portions of the second electrode extending parallel to the first extending portion between the first extending portion and the two second extending portions.

Beading caused by interferences between block patterns, which are driving patterns of two nozzle arrays at the time of printing with the use of the two nozzle arrays for the same color, and a mask is reduced. Specifically, when the mask is created, repulsive potentials are calculated between the mask and planes with the block patterns. That is, when a placement of a print permitting area in the mask is determined, the repulsive potentials are calculated between the mask and dots in the planes with the block patterns, and then the print permitting area is placed on the most dispersive position with the lowest energy. This allows the print permitting areas to be well dispersed in terms of the overlaps between the block patterns and the mask.

A method and an exhaust treatment system are provided for treatment of an exhaust stream comprising nitrogen oxides. The method comprises a first oxidation of compounds comprising one or more of nitrogen, carbon and hydrogen in the exhaust stream; a determination of a value for a ratio between a first amount of nitrogen dioxide and a first amount of nitrogen oxides after the first oxidation; and a first supply of a first additive into the exhaust stream, which is actively controlled based on the determined value for the ratio. Subsequently, a first reduction of at least the first amount of nitrogen oxides is carried out through a catalytic reaction in a catalytic filter, which consists of a particulate filter with an at least partly catalytic coating with reduction characteristics, and is arranged to catch and oxidize soot particles, and to carry out the first reduction of the first amount of nitrogen oxides.

Provided are a method and a system for treatment of an exhaust stream, from a combustion engine comprising nitrogen oxides. An estimate of at least one future operating condition for the exhaust treatment system is determined based on a road section ahead of the vehicle. A first additive is input into the exhaust stream to cause a first reduction of nitrogen oxides in a first reduction catalyst device. A second additive is input into the exhaust stream to cause a second reduction of a second amount of nitrogen oxides in a second reduction catalyst device, arranged downstream of the first reduction catalyst device. The first supply of additive is controlled based on the estimated at least one future operating condition, such that the first reduction catalyst device is exposed, over time, to a substoichiometric condition, with respect to the first additive and the first amount of nitrogen oxides.

The invention discloses a low-smoke halogen-free and flame-retardant polyolefin cable material with high cracking resistance. The invention belongs to the technical field of cable materials, and solves the problem that when a cable wire is subjected to coiling, the cable material possibly cracks at a bent position. The cable material is prepared by the following method of: firstly, mixing 65-75 parts by weight of an ethylene-vinyl acetate copolymer, 25-35 parts of high density polyethylene, 10-18 parts of magnesium hydroxide, 20-40 parts of aluminum hydroxide, 0.05-0.25 part of melamine urate,5-11 parts of red phosphorus, 10-20 parts of a hyperdispersant, 2-5 parts of an antioxidant, 15-21 parts of silicon dioxide, 9-15 parts of silicon resin, 5-11 parts of zinc hydroxystannate, 1.25-1.75parts of sorbitol, and 0.5-1.5 parts of sodium alginate evenly, conducting internal mixing at 130-140DEG C for 10-15min, and carrying out extrusion granulation at 115-140DEG C, thereby achieving theeffects of enabling the cable material to have favorable smoke suppression and flame retardancy and high mechanical properties.

The invention discloses a method and a system for authorizing service of wireless fidelity direct (Wi-Fi Direct) terminal equipment, and relevant equipment. By the method, the system and the relevant equipment, the phenomena of nonuniform distribution of service equipment and service congestion can be effectively reduced. The method comprises the following steps that: service applying equipment and service authorizing equipment configure an authorization code in advance; the service applying equipment transmits a service authorization request which comprises an authorization code to the service authorizing equipment which is scanned by the service applying equipment, wherein the authorization code comprises a service type; and the service authorizing equipment matches the authorization code in the service authorization request with the authorization code which is configured in advance, and when the two authorization codes are matched with each other, corresponding service is provided according to the service type of the authorization code. The system comprises the service applying equipment and the service authorizing equipment.

The invention relates to a method for preparing trichlorosilane from tetrachlorosilane, belonging to the field of polysilicon production. The invention solves the technical problem of providing a method for preparing trichlorosilane from tetrachlorosilane with higher conversion rate. The method comprises the following step: introducing tetrachlorosilane and hydrogen with the molar ratio of 0.15-0.4:1 into a hydrogenation furnace with the pressure of 0.3-0.6Mpa for reaction. The method of the invention improves the conversion rate of the tetrachlorosilane (the conversion rate is improved to about 32%) and the conversion quantity in the same time, solves the problems of accumulation of a large amount of by-product tetrachlorosilane in the production process of polysilicon and environmental protection, has better economic benefit and wide application prospects, and provides a new choice for the processing method of tetrachlorosilane in the field.

The invention discloses a method for preparing artificial quartz stones by using kaolin desliming tailings, which relates to building decoration materials and comprises the following steps of: stirring unsaturated resin and colorants, adding the kaolin desliming tailings, natural river sand and silicon dioxide powder, performing stirring, adding an accelerator, a coupling agent and a curing agent, performing stirring and injecting the mixture into a mould; feeding the mould into a vacuum box for vacuumizing, pressing and forming the mixture and performing curing and heating; and performing cooling de-molding to remove the mould, performing polishing and finally cutting the molded mixture into standard artificial quartz stone slabs, wherein artificial quartz stones are made from the following raw materials in percentage by mass: 12 to 65 percent of natural river sand of 10 to 120 meshes, 15 to 35 percent of natural river sand of larger than 120 to 1,500 meshes, 5 to 15 percent of silicon dioxide powder, 0.1 to 19 percent of unsaturated resin, 0.1 to 5 percent of accelerator, 0.1 to 3 percent of coupling agent, 0.1 to 5 percent of curing agent and 0 to 5 percent of colorant. The method reduces initial investment, and is convenient to operate, easy to implement, simple and reasonable; and the products have the natural veins, stripes and rich colors of marbles, also have the hardness of the quartz stones and are suitable for industrialization.

The invention discloses a virtual-channel low-power circuit applied to a network-on-chip. The virtual-channel low-power circuit is characterized by comprising a clock anticipation on/off module composed of a clock enabling generation module and a clock gating generation module and a cache segmentation gating module composed of a read-write signal control module and a segmented clock gating module. According to the virtual-channel low-power circuit applied to the network-on-chip, the utilization rate of single virtual-channel cache can be increased, the problems of depending on software monitoring and being tight in timing are avoided, power of input cache in the network-on-chip is reduced, the whole Noc power is reduced, and correct transmission of data is guaranteed.