451 results about "Narrow channel" patented technology

Dot-pattern-like impurity regions are artificially and locally formed in a channel forming region. The impurity regions restrain the expansion of a drain side depletion layer toward the channel forming region to prevent the short channel effect. The impurity regions allow a channel width W to be substantially fined, and the resultant narrow channel effect releases the lowering of a threshold value voltage which is caused by the short channel effect.

Systems and methods which implement cooperative techniques at wireless network access points to provide interference mitigation are shown. Embodiments utilize cooperative antenna beam adaptation techniques wherein antenna beam selection, selective antenna beam transmission power, and/or antenna beam null selection is implemented based upon the communication environment created by a plurality of access points. Additionally or alternatively, embodiments utilize cooperative antenna beam isolation techniques wherein narrow channel filters are implemented with respect to antenna beam signals and/or shielding is provided between various antenna beams based upon the communication environment created by a plurality of access points. Embodiments additionally or alternatively utilize cooperative antenna beam coordination techniques wherein transmission and/or reception of signals is coordinated, the use of antenna beams is coordinated, and/or interference cancellation is implemented based upon the communication environment created by a plurality of access points.

The invention discloses an anti-collision fixed-point unmanned aerial vehicle for fire control, and belongs to the field of unmanned aerial vehicles. The anti-collision fixed-point unmanned aerial vehicle for fire control comprises an unmanned aerial vehicle body, a bomb-dropping gun and an anti-collision cover, wherein the bomb-dropping gun is arranged below the unmanned aerial vehicle body; a steering engine is mounted on the bomb-dropping gun and is used for controlling the bomb-dropping gun to launch a fire extinguishing bomb; a collimation mechanism is mounted on the parallelly arranged bomb-dropping gun, so that the bomb-dropping accuracy is improved; the anti-collision cover adopts a cage-shaped structure; the cage-shaped structure encircles the periphery of the unmanned aerial vehicle body to protect the unmanned aerial vehicle body from being collided; a waterproof cover is also arranged on a spiral paddle support to prevent the spraying of flames. According to the anti-collision fixed-point unmanned aerial vehicle, fixed-point fire extinguishment on high-rise buildings and narrow channels is carried out without geographical environment limitation, and the unmanned aerial vehicle is unlikely to collide and damage, high in flying speed, sensitive in actions and wide in application range.

A narrow channel FinFET is described herein with a narrow channel width. A protective layer may be formed over the narrow channel, the protective layer being wider than the narrow channel.

A novel plate fin heat exchanger adapted for high and low velocity fluid flows for dissipating heat from a heat generating component. The heat exchanger comprises an array of fins being affixed to and in thermal communication with a thermally conductive base, wherein the fins are arranged in a fan tail configuration for minimizing flow bypass, and further providing reduced thermal resistance for fluid passing through the fin field. The fins are affixed to and in thermal communication with the base at an acute angle, such that the effective width of the array of fins exceeds the width of the base. The enlarged effective width of the fin array in comparison to conventional heat exchanger provides an increased volume for fluid flow, thereby allowing a greater volume of fluid to enter the fin field and a greater surface area of plate fins for cooling the fluid passing through the heat exchanger. In addition, the heat exchanger comprises a fin density of at least ten fins per inch or greater of base length thereby providing a narrow channel heat exchanger with a fan tail. The aspect ratio of the individual channels between the fins, as compared to parallel fins affixed perpendicular to the base through an extrusion method, generates a reduced pressure drop across the heat exchanger. Accordingly, the heat exchanger of the present invention expands the envelope of cooling performance provided by fluid flow over an array of thermally conductive plates.

An exemplary embodiment relates to a cooling system and a method for cooling an electronic display. A preferred embodiment includes a transparent gas cooling chamber. The transparent gas cooling chamber may have a linear polarizer. The components in the system are preferably housed within the electronic display housing. The cooling chamber defines a gas compartment that is anterior to and coextensive with the electronic display surface. Fans may be used to propel the isolated gas through the cooling chamber. The circulating gas removes heat directly from the electronic display surface by convection. The isolated gas is transparent or at least semi-transparent. The image quality of an exemplary embodiment remains essentially unchanged, even though the gas is flowing through a narrow channel over the visible face of the electronic display surface.

An embodiment of the invention provides a path planning method for robot fast collision avoidance. The method comprises using a BBRrt algorithm and a collision detection algorithm based on the convex set theory, extending alternatively from initial configuration and target configuration to opposite configuration form two balance RRT trees, quickly finding, in a configuration space, a collision-free motion path connecting the initial configuration and the target configuration, effectively passing through a narrow channel and avoiding collision with obstacles in the environment, making full use of a multi-step expansion method and a balance extension method with an inspiring purpose, and thus effectively improving the convergence and repeatability of the RRT algorithm. Based on the convex set theory, a convex hull fast collision detection algorithm constituted by a linear inequation group is provided, and the efficiency and performance of a collision detection module in the path planning method for collision avoidance can be improved. The method provided by the invention can be extended to high-dimensional robot multi-tree RRT path planning.

A method of fabricating a double gate, FINFET device structure in a silicon on insulator layer, in which the channel region formed in the SOI layer is defined with a narrowed, or necked shape, and wherein a composite insulator spacer is formed on the sides of the device structure, has been developed. A FINFET device structure shape is formed in an SOI layer via anisotropic RIE procedures, followed by a growth of a silicon dioxide gate insulator layer on the sides of the FINFET device structure shape. A gate structure is fabricated traversing the device structure and overlying the silicon dioxide gate insulator layer located on both sides of the narrowest portion of channel region. After formation of a source/drain region in wider, non-channel regions of the FINFET device structure shape, composite insulator spacers are formed on the sides of the FINFET shape and on the sides of the gate structure. Metal silicide is next formed on source/drain regions resulting in a FINFET device structure featuring a narrow channel region, and surrounded by composite insulator spacers located on the sides of the device structure.

The invention discloses a channel sandstone reservoir identification method. The method includes: acquiring seismic response features of channel sand by performing forward modelling on reservoirs, and determining channel-sand seismic identification marks of different geologic bodies; extracting corresponding seismic attributes according to the channel sand seismic identification marks, and determining a channel boundary; under an isochronous stratigraphic frame, determining sedimentary periods of the channel sand by the aid of the stratal slice technique; determining the thickness of the channel sand according to the statistical fitting relation of the real well-drilling sand thickness and the seismic attributes. According to the method, the channel sand identification and description technology is created by going deep into seismic attribute extraction and analysis, utilizing the reservoir of the fixed well, reservoir calibration results and statistical analysis of well drilling and combining forward model analysis results. Channel sandstone reservoirs of ultra-deep layers, thin sand layers and narrow channels can be identified and described accurately, and influence of seismic resolution is less.

A system and method are provided to intelligently undertake mandated scanning for radar signals prior to operating a particular wireless device in the 5 GHz band. The disclosed systems and methods provide a capability by which wireless devices are enabled to intelligently scan using a 160 MHz signal, or the largest bandwidth that the wireless device has the capacity to occupy. The disclosed scheme makes use of information about the location of the wireless device to determine characteristic of the environment in which the wireless device is operating. Locations of potentially conflicting radar installations, such as at airports and on military installations, are generally “known.” This information is used to compare to a determined geographic location of the wireless device to assess whether full broad bandwidth DFS scanning cane be reasonably undertaken or whether some narrower channel scanning is appropriate for the wireless device based on proximity to radar installations.

A method, device, and system that use narrowband channels to provide higher re-use without multiplying the operator spectrum requirement. If a communication system supports variable carrier bandwidth channels, the narrow channel capacity can be divided among adjacent cells to provide higher re-use.

A field effect transistor having a narrow channel and a method for forming such a device. An upstanding nanopillar is formed from a substrate by directional etching of the substrate preferentially masked by a nanoparticle. A stack of planar layers of material is formed adjacent and around the nanopillar. The bottom layer, adjacent the substantially planar top substrate surface, comprises insulating material. A conductive gate layer overlies the bottom layer while a second insulating layer overlies the gate layer. The pillar material is etched to leave a nanopore into which semiconductor material is deposited, forming an upstanding channel, after insulating material has been deposited on the interior of the nanopore. The source or drain may be a conductive substrate or a doped region of the substrate formed immediately beneath the nanopillar with the other electrode formed by doping the region adjacent the top of the channel.

Two-phase, boiling heat transfer in confined channels close to a source of heat, such as an electrical component or device, carries the latent heat of vapors away to remote locations where “real estate” demands of air convection are tolerable operationally, economically, and technologically. Liquid-to-vapor, phase-change, heat transfer in a narrow channel (e.g., typically less than 0.200 inches total thickness, and often less than 0.150 in the channel itself) improves by several hundred percent the heat extraction from modest temperature (e.g., about 120 degree F.) devices, when compared to heat fluxes in pool boiling. Saturated working fluids provide nearly isothermal conditions in the working fluid. Minimal conduction paths provide minimal temperature gradients, and capillary action may maintain nearly constant temperature conditions about a surface of a heat source, while carrying heat of vaporization away to a condensation location.

The invention relates to a silicon chip surface defect detector capable of classifying defects and a defect classifying method. The flat surface of the silicon chip to be detected on a highly reliablesilicon chip working platform is irradiated by a laser from an inclination direction. Circular narrow channel collection and annular narrow channel collection are carried out on scattered lights produced by the silicon chip surface defect by two paraboloidal mirrors with different calibers in a direction near the silicon chip face normal and parallel with silicon chip face. Two photoelectric detectors detect intensities of the collected electrooptical signals in two channels respectively and then take a ratio of two intensities, then compare the ratio with a given threshold value, and at lastthe silicon chip surface defects can be classified. The defect detector has the advantages of simple structure, high sensitivity, fast detecting speed, capability of classifying the defects on the silicon chip surface, etc.

The invention discloses a quadruped robot path planning method and system based on an improved A* algorithm. The method comprises the steps of constructing an environment raster map,and representing aquadruped robot and a target position through raster coordinates; on the basis of the smallest distance between the edge of a robot body and the center of the quadruped robot,performing initial expansion on the raster where a barrier is located,and enabling the barrier and the raster obtained after initial expansion to jointly form the minimum impassable region; according to the the safe distanceneeded by actual operation of the quadruped robot,determining the outward expansion raster layer number on the basis of the minimum impassable region,and adopting the raster obtained after outward expansion inside the region as a barrier virtual expansion raster; utilizing the improved A* algorithm for determining a passing price value from the initial raster and the target raster,and determiningthe corresponding path obtained when the passing price value from the initial raster point to the target raster point is minimum is determined as the optimal path. The problem that a narrow channel is blocked can be avoided while the quadruped robot is driven to move away from the barrier.