8results about How to "Improve low efficiency" patented technology

The present invention discloses an L-band extended hybrid fiber amplifier, which belongs to the technical field of broadband fiber amplifiers. The system includes a first amplifying module and a second amplifying module; the first amplifying module is used to amplify the signal power of a conventional signal band; the second amplifying module is provided with an erbium-doped fiber, which is used to eliminate the backward ASE generated by the first amplifying module and amplify the signal power of an extended wavelength band. The present invention connects a section of highly-absorbent thulium-doped fiber to the front end of the first amplifying module including an erbium-doped fiber and a wavelength division multiplexer, and utilizes its absorption and emission characteristics in the C+L band to eliminate the backward 1.5μmASE generated in the system, thereby improving the L-band extended band amplification performance. The system of the present invention has a simple structure, high cost-effectiveness, and high efficiency, and at the same time meets the urgent demand for communication capacity of the current optical fiber communication system.

This invention provides a method for calculating segmented discontinuous solar radiation temperature gradients in enclosed stacked aqueducts, relating to the field of aqueduct technology. The method divides the inner cavity of the enclosed stacked aqueduct into a gas-phase coupled heat transfer zone, a gas-liquid phase interface zone, and a fluid heat source anchoring zone based on water level height, constructing a thermo-solid coupled heat transfer model that distinguishes the properties of the media. Through this partitioning, the heat exchange characteristics of different regions can be accurately matched, establishing a segmented discontinuous solar radiation temperature gradient kernel function along the height coordinate. Based on the thermo-solid coupled heat transfer model that distinguishes the properties of the media, the discontinuous solar radiation temperature gradient kernel function is used as a boundary driving source, substituted into the transient nonlinear heat conduction partial differential equation for iterative solution, outputting a discontinuous solar radiation temperature gradient curve containing abrupt step characteristics at the water surface line. This method solves the problem of inaccurate calculation of solar radiation temperature gradients in enclosed stacked aqueducts and is applicable to the calculation of solar radiation temperature gradients in enclosed stacked aqueducts.

This invention discloses a millable composite casing sub for side-drilling window opening, its preparation method, and its application. The millable composite casing sub comprises the following components: a matrix, a lubricating phase, and brittle phase reinforcing particles; the matrix is ​​an aluminum alloy matrix; the lubricating phase is graphite particles; and the brittle phase reinforcing particles are brittle mineral particles. During side-drilling window opening operations, an integrated hydraulic directional device is seated inside the lower steel casing below the casing sub. A gyroscope is used for precise orientation, and then a milling cone is lowered to perform side-drilling window opening. The sub body is milled using the milling cone to form the initial window. This invention, while ensuring the overall connection strength and sealing of the wellbore, locally alters the millability of the casing material at the planned window opening point. Through material and structural innovation, it replaces traditional steel casing, shortens the operation cycle, reduces the difficulty of milling operations, and extends the service life of the milling cone, thereby achieving high efficiency, low cost, and safety and reliability in window opening operations.

The present invention discloses a line-of-sight direction tracking method and apparatus. The line-of-sight direction tracking method includes: providing corneal reflection for eyes of a user by using a plurality of light sources, and capturing images including a face of the user by using a plurality of cameras; determining light source reflection point coordinates and pupil center coordinates in a world coordinate system by means of a human eye feature set acquired from the images including the face, in combination with hardware calibration parameters; determining a line-of-sight optical axis according to the light source reflection point coordinates and the pupil center coordinates, and reconstructing, by the line-of-sight optical axis, a line-of-sight visual axis by means of a compensation angle; and determining a point of sight on a target object according to the line-of-sight visual axis and a position of the target object in the world coordinate system. According to the present invention, the technical problems of high hardware cost, low algorithm optimization efficiency and low estimation accuracy of line-of-sight tracking are solved.

The utility model relates to tobacco grading technical field discloses a kind of tobacco grading device and control system based on spectral technology, the tobacco grading device based on spectral technology, including sorting table, the one side of sorting table is equipped with tobacco conveyer, the one side of tobacco conveyer is equipped with material distributing conveyer, the one side of material distributing conveyer is equipped with discharge conveyer, the other side of tobacco conveyer is equipped with electric control cabinet, the bottom of tobacco conveyer is equipped with material returning conveyer, the top of tobacco conveyer is fixedly connected with box, the inner wall of box is fixedly connected with partition, the one side of partition is provided with moving structure. Tobacco is transported to box by tobacco conveyer, industrial camera cooperates with light supplement lamp to obtain tobacco appearance image, height adjusting structure drives its adjustment height to adapt different tobacco, cleaning structure guarantees the cleanness of industrial camera, near-infrared spectrometer detects tobacco inherent quality comprehensively through moving structure.

The invention discloses a box girder reinforcing steel bar self-adaptive distribution device which is used for distributing longitudinal reinforcing steel bars in box girder manufacturing and comprises a positioning module and a base, the positioning module comprises a plurality of supports, a plurality of positioning grooves and a locking assembly, the supports are arranged on the base and can move relative to the base, the positioning grooves correspond to the supports one to one, and the locking assembly is arranged on the positioning grooves. The positioning groove and the base are respectively positioned at two ends of the bracket; the locking assembly locks or unlocks the support on the base. The problem that traditional box girder steel bar arrangement depends on module customization is solved, the self-adaptive distribution device can automatically adjust the distance and the number of the supports according to the characteristics of different box girder products, so that diversified production requirements are met, the time cost of positioning module customization is not needed any more, the production efficiency is greatly improved, and the production cost is reduced. And meanwhile, the precision is ensured, and the mechanical property and durability of the box girder are improved.

The invention belongs to the technical field of metal plate transferring, and discloses an ultrathin large-size metal plate transferring device which comprises a gantry frame, universal wheels are installed at the four corners of the bottom end of the gantry frame through screws, a fixing pin is installed in the middle of the top end of the gantry frame in a penetrating mode, and a rotating rod is rotationally connected to the outer side of the fixing pin. The bottom end of the rotating rod is attached to the top end of the gantry frame, vertical rods are symmetrically and fixedly installed on the two side edges of the bottom end of the rotating rod, a motor installation plate is fixedly installed on one end face of each vertical rod, a driving structure is fixed to one end face of each motor installation plate, and a limiting structure is installed at one end of each driving structure. By preventing interference of external objects on the metal plates, surface damage such as scratches and creases occurring in the carrying process of the metal plates is effectively reduced, the overall quality of products is improved, and by reducing the damage to the plates and improving the efficiency, the device is beneficial to reducing the production cost and improving the economic benefits of enterprises.

The present invention discloses a method for recording and reproducing digital pathology diagnosis ideas, and a related device. The recording method includes: starting a digital slice browser, loading a slice list related to a diagnosis case; calling a recording device for voice recording; starting a timer, and the timer records the operation content of the digital slice browser; closing the recording device and the timer, and saving the recording data and the operation content data. The present invention improves the technical problems of low efficiency of existing graphic recording of pathology diagnosis ideas, and large storage space occupied by videos of video recording of pathology diagnosis ideas.