50results about How to "Increase overlap area" patented technology

The invention relates to a three-dimensional panoramic image generation method. The method comprises the following steps of: shooting a plurality of local images of a panorama at a low angle and a high angle at a horizontal position opposite to a tripod head by using a wide-angle camera respectively; synthesizing a plane composite image from each shot local image; converting the plane composite image into a three-dimensional spherical image; and performing three-dimensional navigation on the three-dimensional spherical image. By the method, the overlap region of the local images can be increased, so that the image effect is smoother and the obtained three-dimensional panoramic image is more similar to a real scene when the local images are synthesized into the plane composite image. The invention also provides a three-dimensional panoramic image generation system.

The invention discloses an ensemble kalman filter-based particle filtering method, which comprises the following steps of: the initialization of sampled particles, the prediction of a background ensemble at a k moment, the calculation of a kalman gain, the fusion of the latest observation information, the updating of the background ensemble, the recalculation and analysis of the ensemble, the construction of a suggested Gaussian distribution function, the normalization of weights, and the like. The ensemble kalman filter-based particle filtering method provided by the invention avoids the calculation of a Jacobian matrix because a nonlinear system is not required to be linearized, and improves the calculation accuracy by adopting a sampling method to realize approximately linear distribution. In the particle filtering method, a sampling point number is heuristic and can be flexibly set, so the amount of calculation is not increased sharply with the increasing of dimensionality, and the real-time performance is effectively controlled.

A method of manufacturing a flash memory is provided. First, a substrate with a first gate structure and a second gate structure thereon is provided. The first gate structure and the second gate structure each comprises of a dielectric layer, a first conductive layer and a cap layer. A tunneling oxide layer is formed over the substrate and then a first spacer is formed on the sidewall of the first conductive layer. Thereafter, a second conductive layer is formed on one side designated for forming a source region of the sidewalls of the first gate structure and the second gate structure. Then, the source region is formed in the substrate in the designated area. Next, an inter-gate dielectric layer is formed over the second conductive layer and then an insulating layer is formed over the source region. After forming a third conductive layer over the area between the first gate structure and the second gate structure, a drain region is formed in the substrate.

A grid formation method comprises the following steps: forming a polysilicon layer on a substrate; executing first etching operation on the polysilicon layer and executing second etching operation on the polysilicon layer by etching gases containing bromine-based gases to form the grid; if the flow of the pumped bromine-based gases is a0 when the grid perpendicular to the substrate is obtained, the flow a when the bromine-based gases are pumped is more than a0. A grid is formed on the substrate and comprises the polysilicon layer; wherein, the polysilicon layer comprises a top wall, a bottom wall opposite to the top wall and a side wall jointed with the top wall after extending upwards from the edge of the bottom wall; the included angle of at least partial side wall and the bottom wall is less than 90 degrees. Under the condition of keeping the electrical length of a channel unchanged, the overlapped region of the grid and a drain is expanded and the hot carrier effect is improved.

The invention provides a compensation light source system and a dynamic image detecting device for a train operation fault. The compensation light source system comprises a laser generator (50) provided with an optical fiber (51) provided with an optical output end, and a beam shaping component. The beam shaping component comprises a cylindrical planoconvex lens (80) and a cylindrical planoconcave lens (90). The cylindrical planoconvex lens (80) and the optical output end of the optical fiber (51) are arranged oppositely, the cylindrical planoconcave lens (90) and the cylindrical planoconvex lens (80) are arranged sequentially along the transmission direction of laser beams transmitted by the optical output end of the optical fiber (51), and a bus of the cylindrical planoconcave lens (90) and a bus of the planoconvex lens (80) are perpendicular to each other. The compensation light source system and the dynamic image detecting device for the train operation fault have increased light utilization rate and allow light spots finally formed to meet the shooting requirements of a camera.

The present invention describes a self mode locking laser and a method for self mode locking a laser. The laser (1) comprises a resonator terminated by first (3) and second (4) mirrors and folded by a third mirror (5). The third mirror comprises a single distributed Bragg reflector (17) upon which is mounted a multilayer semiconductor gain medium (18) and which includes at least one quantum well layer and an optical Kerr lensing layer (22). Self mode locking may be achieved by configuring the laser resonator such that the lensing effect of the Kerr lensing layer acts to reduce an astigmatism deliberately introduced to the cavity mode. The self mode locking of the laser may be further enhanced by selecting the length of the resonator such that a round trip time of a cavity mode is matched with an upper-state lifetime of one or more semiconductor carriers located within the gain medium.

The invention discloses a thin-film lithium niobate electrooptical modulator and a preparation method thereof. The modulator comprises a substrate, a buried oxide layer, a polymer layer and an optical waveguide layer which are sequentially arranged from bottom to top, a metal signal electrode and a metal grounding electrode are arranged on the optical waveguide layer or in the polymer layer below the optical waveguide layer, and a 1 * 2 beam splitter, a Mach-Zehnder modulator and a 2 * 1 beam combiner are arranged on the upper bottom surface of the optical waveguide layer. The 1 * 2 beam splitter and the 2 * 1 beam combiner are located on the two sides of the Mach-Zehnder modulator, and the two output ends of the 1 * 2 beam splitter are connected with the two input ends of the 2 * 1 beam combiner through the Mach-Zehnder modulator. According to the invention, microwave loss caused by the substrate in the technological process is avoided, the technological difficulty is reduced, the modulation efficiency is improved, and the electro-optical modulator with ultra-large bandwidth, low loss, compactness and ultra-high performance is realized.

An arm made of composite material, and relative production method, consisting of a plurality of articulated segments with a longitudinal main axis (x), pivoted to each other, each of the articulated segments comprising a box-like structure and at least a joint element attached thereto by means of gluing, the box-like structure having an end cooperating with an end of the joint element on the inside of the surface of the joint element. The ends define a substantially conical reciprocally overlapping area and have profiles concordantly inclined by an angle (α) with respect to the longitudinal axis (x).

The invention discloses a panoramic depth camera system capable of acquiring a 360-degree scene structure. The system is characterized in that eight fisheye lens cameras are placed in the range of a circle, objects in the periphery 360-degree space can be acquired at a time, and the base length is appropriately selected according to the scene range. By adopting the technical scheme, the system achieves the advantages that being different from an active detective type depth camera, the scheme still can normally work outdoors; according to a late algorithm, the camera can provide the 360-degreethree-dimensional scene structure and can be applied to the fields of seamless panoramic photo composition, three-dimensional measurement, three-dimensional modeling and the like; due to multiple projection constraint, the noise resisting capacity of visual three-dimensional reconstruction can be improved, and the system robustness can be improved; and the three-dimensional objects of the 360-degree space can be shot simultaneously without multiple times of scanning and composition, and therefore the shooting efficiency of the system is improved.

The present invention relates to a pole piece structure of stator with radial winding, which employs an optimum ratio α to define the form of the pole piece, increase the overlap region of inductance and torque and lower the cogging torque of a motor, so as to strengthen the self-starting capability of the motor and minimize torque ripple to enhance the overall performance of the motor. The pole piece structure includes a hub having a hole at the center, and a plurality of poles integrally formed on the periphery of the hub, extended to radiate in a radial direction, and having a pole shoe expanded from an end of each pole in a tangential direction, wherein the angle of a single pole shoe is divided by a pitch angle of two adjacent poles to obtain a ratio in a range of 0.86˜0.95.

The invention relates to a valve insert (1) for a heater valve (2). The valve insert is used for controlling the flow rate of a heating medium and/or regulating the flow rate of the heating medium; the valve insert has a presetting device (9) by means of which the flow rate can be throttled to a predetermined value, and is positioned in the heater valve through an inflow and outflow openings (14, 22) in such a way that the flow rate supplied to a heater (3) is allocated to at least two heating elements in any ratio, and/or optionally, the flow rate is directed into one or the other heating element of the heating elements; a device for setting the flow direction of the flow rate is integrated in the valve insert, the device can be externally accessible and actuated, and the device can directly change the flow direction of the flow rate from the valve insert.

The invention provides an image matching method, an image matching device and unmanned equipment. The image matching method comprises the following steps: acquiring a first image acquired by unmanned equipment at a first shooting position on a first track; acquiring a second image collected by the unmanned device at a second shooting position on the second track, and the second shooting position is determined by the first shooting position and absolute position information of the unmanned device; selecting one of the first image and the second image as a to-be-matched image and the other as a matched image; and performing feature matching on the first feature point on the first matching area of the to-be-matched image and the second feature point on the matching image, and the first matching area is a first overlapping area, which is overlapped with the matching image, on the to-be-matched image. According to the method of the invention, the feature points needing to be matched in the to-be-matched image in the feature matching process can be reduced, and meanwhile, the feature matching speed and accuracy are improved.

The embodiment of the invention provides a micro-ring modulator, which comprises: a substrate layer; a slab waveguide layer positioned on the substrate layer; a coupling waveguide and a micro-ring resonance structure arranged in the slab waveguide layer in parallel, wherein the micro-ring resonance structure comprises a first doping structure and a second doping structure which are sequentially arranged in a stacked mode in the thickness direction of the substrate layer, and the doping type of the first doping structure is opposite to that of the second doping structure; and an electrode electrically connected with the micro-ring resonance structure.

Provided is a wireless base station capable of increasing an area of overlap between a cell of the wireless base station and a cell of an adjacent wireless base station before the wireless base station narrows a cell range or reduces transmission power. A wireless base station (1-1) includes a communication unit (1A) and a control unit (1B) that transmits, to a wireless base station (1-2) adjacent to the wireless base station (1-1), through the communication unit (1A), an instruction signal that gives an instruction to expand a cell range of the wireless base station (1-2) in a direction of the wireless base station (1-1) before the wireless base station (1-1) narrows a cell range or reduces transmission power.

The micro-disk modulator provided by the embodiment of the invention comprises a substrate layer; the slab waveguide layer is positioned on the substrate layer; the coupling waveguide and the micro-disc resonance structure are arranged in the slab waveguide layer in parallel, the micro-disc resonance structure comprises a first doping structure and a second doping structure which are sequentially arranged in a stacked mode in the thickness direction of the substrate layer, and the doping type of the first doping structure is opposite to that of the second doping structure; the projection of the second doping structure on a preset plane is circular, and the preset plane is perpendicular to the thickness direction of the substrate layer; and an electrode electrically connected with the micro-disk resonant structure.

The invention discloses a lithium niobate film electro-optical modulator which comprises a substrate wafer (1), a lithium niobate film substrate (2), a lithium niobate optical waveguide (3), a lithium niobate film lining (4), a traveling wave electrode (5), a protective layer (6) and an extraction electrode (7). By improving the structure of a traveling wave electrode in electro-optic modulator in general design, a part of the metal electrode (5) covers an etching area, and a part of the metal electrode (5) covers the lithium niobate film lining (4), so that the effective refractive index of microwaves is increased under the condition that the distance between the electrodes is the same, the wave velocity matching is realized, and the bandwidth of the electro-optical modulator is improved. The invention further provides a preparation method of the lithium niobate film electro-optical modulator; the lithium niobate film is directly etched to obtain the required waveguide structure based on the traveling wave electrode structure in the lithium niobate film electro-optical modulator, the etching area is reduced, and the process difficulty and cost are reduced.