93results about How to "Reduce distribution density" patented technology

A method and apparatus are provided for adaptively allocating pilots in a pilot-aided channel estimation system. A multipath delay is measured between a base station (BS) and a mobile station (MS). A distribution density of pilots of a signal to be transmitted between the BS and the MS is controlled. When the multipath delay is large, the pilot distribution density is relatively raised. However, when the multipath delay is small, the pilot distribution density is relatively lowered. The pilot distribution density is adaptively controlled according to the multipath delay, such that resources are effectively utilized and throughput is improved.

The invention relates to a novel graphene material and a chemical vapor deposition (CVD) preparation technology, and in particular relates to a preparation method of high-quality large-size monocrystal graphene, suitable for preparing high-quality large-size monocrystal graphene. The preparation method comprises the steps of: based on a chemical vapor deposition technology, in the presence of a carrier gas containing hydrogen, carrying out heat treatment on a metal substrate (copper, platinum and other metals) by taking a hydrocarbon compound as a carbon source, and carrying out catalytic cracking at a high temperature by virtue of the carbon source gas, so as to grow the monocrystal graphene; etching graphene by regulating concentrations of hydrogen and carbon source, so as to greatly reduce distribution density of the monocrystal graphene; and regulating a reaction atmosphere again to grow monocrystal graphene again, and carrying out the growth operations several times in the same way, so as to finally obtain the high-quality large-size monocrystal graphene. The high-quality inch-grade monocrystal graphene disclosed by the invention lays the foundation for application in a nano-electronic component, a transparent conductive film, a display, a solar cell electrode, a gas sensor, a thin-film electronic component and other photoelectric fields.

The invention discloses a method for segmenting a gray scale image based on the multi-objective particle swarm optimization algorithm, relates to the technical field of image processing, and mainly solves a problem that a traditional method is single in evaluation index, has high possibility of leading poor consistency of regions, and is disordered in edge. The method comprises the following steps: (1) extracting characteristics of a gray scale image to be segmented, namely selecting a gray scale of the image as data for a cluster to be clustered; (2) setting an operating parameter and initializing a particle swarm; (3) performing multi-objective clustering on the data combining the multi-objective particle swarm optimization algorithm to obtain a solution set approximate to Pareto; (4) selecting a solution with the largest PBM index from the solution set obtained in the step (3) as the optimal solution, namely a clustering result; (5) allocating a clustering mark to each pixel of the image to be segmented according to the clustering result obtained in the step (4) to obtain a segmenting result. The method has the advantages that the consistency of regions is good according to the segmenting result, complete information can be reserved, and the computing speed is quick, and can be used for image target identification.

Disclosed is a surface covered tool, such as a cutting tool (1), wherein the surface of a base body (2) is covered with a cover layer (6), the cover layer (6) is composed of a lower layer (8) and an upper layer (9), and the lower layer (8) and the upper layer (9) are both composed of columnar particles (10) extending perpendicularly to the surface of the base body (2). The average crystal width of the columnar particles (10b) constituting the upper layer (9) is smaller than the average crystal width of the columnar particles constituting the lower layer, dispersed particles containing tungsten exist in both the lower layer and the upper layer, and the distribution density of the dispersed particles existing in the upper layer is smaller than the distribution density of the dispersed particles existing in the lower layer. The surface covered tool is provided with the cover layer which improves abrasion resistance and defect resistance.

The invention discloses an arrival time-based cooperative localization method applied to a wireless sensor network, which uses a second-order cone relaxation technique and a positive semi-definite relaxation technique to relax a minimization problem obtained by constructing a maximum likelihood function to obtain a description of the problem mixing positive half-definite and second-order cone programming; thus, a global optimal solution can be ensured to obtain without the influence of local convergence, and the localization accuracy is high; the influence of measurement noise error can be effectively suppressed; meanwhile, the prior art can be used for solving an estimate value of the coordinates of an unknown target source, thereby reducing the distribution density of the anchor nodes and reducing the cost.

The invention relates to a light emitting device having a radiation emitting element, for example a light emitting diode, and a luminescent material which is able to absorb a part of the radiation sent out by the radiation emitting element and to send out light with a wavelength which is different from the wavelength of the absorbed radiation. The device further has diffusing particles which are able to scatter a part of the radiation sent out by the radiation emitting element, and/or to scatter a part of the light sent out by the luminescent material. The diffusing particles are of non-activated luminescent material, through which production is simplified.

A graphical indicator provided on the surface of an object to represent index information includes a content part and a header part. The content part is spread with a plurality of micro-units and divided into a plurality of state zones. Each state zone is spread with one micro-unit and equally divided into multiple hypothetical sections. The micro-unit is placed in any of the hypothetical sections to form different candidate states. The header part is spread with a plurality of micro-units that are specifically arranged to provide header information used to recognize the graphical indicator.

The invention discloses a backlight module and a liquid crystal display. The backlight module comprises a back plate, a light source arranged on the back plate, and a fluorescent film arranged above the light source, and fluorescent particles are distributed in the fluorescent film and are used for scattering light emitted by an LED, wherein the distribution density of the fluorescent particles gradually decreases from the center to the periphery of an area in the area of each LED corresponding to the fluorescent film. Based on the backlight module, the uniformity of brightness of emergent light of the backlight module is improved, and the large viewing angle display quality of an LCD is improved.

The invention relates to an LED (Light Emitting Diode) panel lamp, which comprises a lamp frame, a substrate, a plurality of blue-light LEDs, a light guide plate, a diffusion plate and a film doped with fluorescent powder. The light guide plate and the diffusion plate are embedded in the lamp frame. The substrate is arranged on the internal side surface of the lamp frame which faces to the side surface of the light guide plate. A plurality of cup troughs are abreast arranged on one side, which faces to the side surface of the light guide plate. of the substrate. One blue-light LED is installed in each cup trough. The blue-light LEDs are connected in series or in parallel. The film is attached onto the side surface, which faces to the blue-light LEDs, of the light guide plate. The light guide plate is provided with a light reflecting film. The light reflecting film is attached onto one surface of the light guide plate. The diffusion plate is arranged on the other surface, which is opposite to the light reflecting film, of the light guide plate. The LED panel lamp has the advantages that the emergent light is relatively uniform, the problem of glaring does not occur, the influence of a single damaged LED on the overall lighting effect is smaller, and the illuminating effect is better; since the blue-light LEDs are abreast arranged, the distribution density is lower and the heat dissipating effect is better; and since the blue-light LEDs are directly installed in the cup troughs, the production process is simple and the production cost is reduced.

A display panel is disclosed. The display panel is divided into a central region and a peripheral region. The central region is located at a central position of the display panel. The central region is extended outward from the central position and occupies a predetermined area. The peripheral region surrounds the central region. It is noted that distribution density of the pixels located in the central region is greater than that of the pixels located in the peripheral region. The present invention can solve the problem of circuit instability caused by disposing a large number of pixels on a high-resolution display panel.

A display device includes a first substrate and a second substrate, which face each other, and each of which includes a display area and a non-display area disposed outside the display area, a first light-blocking layer disposed in the non-display area, and a dummy color layer, in which a boundary dividing the display area and the non-display area is defined, and which is disposed in the non-display area of the first substrate to be adjacent to the boundary, where the dummy color layer includes a section in which a distribution density of the dummy color layer is decreased from the boundary to the outside of the non-display area.

The invention discloses a flat water-cooling heat radiation device, which comprises an upper cold plate and a lower cold plate, wherein the top surface of the upper cold plate and/or the bottom surface of the lower cold plate are contacted with a heating device; a plurality of downwards protruded platforms are arranged on the bottom surface of the upper cold plate; a plurality of upwards protruded platforms are arranged on the top surface of the lower cold plate; the lower protruded platforms on the bottom surface of the upper cold plate are staggered with the upper protruded platforms on the top surface of the lower cold plate; a flow channel is formed between the bottom surface of the upper cold plate and the top surface of the lower cold plate; cooling liquid flows in the flow channel so as to take away heat of the upper cold plate and the lower cold plate. According to the flat water-cooling heat radiation device, the manufacturing cost and the manufacturing difficulty can be reduced, and the heat radiation performance is improved.

An underlying substrate including a seed crystal layer of a group 13 nitride, wherein projections and recesses repeatedly appear in stripe shapes at a principal surface of the seed crystal layer, and the projections have a level difference of 0.3 to 40 μm and a width of 5 to 100 μm, and the recesses have a bottom thickness of 2 μm or more and a width of 50 to 500 μm.

The invention discloses a positioning system and a positioning method in a garage based on RFID recognition. There are RFID readers with the number of a (1) and RFID read-write trigger devices with the number of b (2) in a garage. Each RFID read-write trigger device (2) is wired/wireless connected with an RFID reader (1) in the detection area; and an RFID reader is connected to a garage server. AnRFID read-write trigger device (2) sends a trigger signal to an RFID reader (1) after detecting a vehicle/person, so that the RFID reader (1) reads the RFID tag of the vehicle/person. Beneficial effects are that an RFID read-write trigger device will start an RFID reader only when a vehicle/person enters the detection area of the RFID read-write trigger device and the device detects the presenceof the vehicle/person, and the energy consumption of an RFID read-write trigger device is lower than that of an RFID reader, which makes the RFID reader not open frequently and saves energy consumption.

The invention provides a fence rack for lycium barbarum L. cultivation. Meanwhile, the invention further provides a fence rack-based lyciumbarbarum L. cultivation technology. The fence rack cultivation method can improve tree fruiting height and space, rises fruiting main branches, cultures stereoscopic fruiting branch sets, prevent fruiting branch tip lying on the ground, improve fruiting output and enhance fruit quality.

The invention discloses a water collection pit anti-floating integral formwork system and an installing method for the formwork system. The formwork system comprises a coverless box type formwork anda supporting system arranged in the box type formwork, wherein the box type formwork is formed by assembling a plurality of side dies and a bottom die. The bottom die and the side dies are fixedly arranged on bottom steel bars and side face steel bars of a steel bar support correspondingly. The bottom die and the side dies are concrete prefabricated plates internally provided with steel bar nets,and a plurality of segmented water stop screws are arranged between the bottom die and the bottom steel bars and between the side dies and the side face steel bars, wherein the segmented water stop screws are distributed in a grid-like manner. A plurality of vibration holes are evenly distributed in the bottom die and between the water stop screws. During installation, the segmented water stop screws, the bottom die and the side dies are installed, and then the supporting system is arranged in the box type formwork formed by assembling the side dies and the bottom die. According to the obtained water collection pit anti-floating integral formwork system and the installing method for the formwork system, formwork removal is not needed, time and labor are saved for formwork installation, andthe construction period is short.

The invention discloses a distribution transformer fault detection method and device in the technical field of fault detection. The distribution transformer fault detection device comprises a distribution transformer, a mutual inductor, an infrared temperature detector and a cooling mechanism. A primary side three-phase winding and a secondary side three-phase winding are arranged in the distribution transformer; the mutual inductor and the infrared thermoscope are respectively arranged beside the primary side three-phase winding and the secondary side three-phase winding; the cooling mechanism comprises a cooling mechanism and a detection mechanism; the cooling mechanism and the detection mechanism are respectively arranged at the lower end of the distribution transformer, and the mutual inductor is externally connected with an online detection system; the mutual inductor is used for detecting electrical signals of the primary side three-phase winding and the secondary side three-phase winding; the on-line detection system is used for receiving electrical signals of the primary side three-phase winding and the secondary side three-phase winding to calculate the loss power change rate of the distribution transformer and determining the maintenance strategy of the distribution transformer according to the loss power change rate.