80results about How to "Solve the existing disadvantages" patented technology

The invention relates to a campus classroom attendance checking-in system and a method for realizing attendance checking-in by using the system. The system comprises student mobile terminals, a class AP (Access Point), a class mobile terminal, a class server and a background server. The system is characterized in that the student mobile terminals and the class mobile terminal are connected through the class AP and the class server; and the class server is connected with the background server through the class AP. The campus classroom attendance checking-in system provided by the invention can be used for realizing the attendance checking-in of students by means of matching the student mobile terminals and the class mobile terminal with the server. According to the system and the method provided by the invention, the problems of low roll-call efficiency and low classroom scoring efficiency in the conventional university teaching can be overcome. The campus classroom attendance checking-in system has good practical values.

The invention discloses dry heat transfer printing paper and a preparation method thereof for textiles. The method includes preparing viscous fluid with a solid content of 2-10% w/w from a high polymer thickener and a water-soluble hot melt adhesive according to a mass ratio of (1:5)-(5:1); adding assistants such as acid, alkali, an absorbent and a fixing agent into the viscous fluid according to categories of fabric and dye so as to produce a transfer substrate; and subjecting the transfer substrate to coating, drying and press polishing processing for the paper to obtain the dry heat transfer printing paper for the textiles. The paper can generate strong adhesive force on the surface under a certain temperature and pressure and can be tightly attached to the fabric. If the paper is used for printing of non-thermoplastic fabric, modified or dewing treatment is not required any more before the printing, transfer printing can be directly performed on dry-state fabric, the dye transfer stability is guaranteed, and clean and high-quality printed patterns can be obtained; and simultaneously, the processing time is shortened, waste water emission of the printing and dyeing industry is reduced, and energy saving and environment protection are facilitated.

The invention provides a concrete distributor with an arm support capable of both horizontal rotation and pitching movement. The concrete distributor comprises a tower body support and an arm support system connected in parallel with a concrete pumping pipeline. The head end of the arm support system is rotationally connected with the tower body support in horizontal rotation manner via a first horizontal rotation mechanism. The concrete pumping pipeline comprises a feeding pipe and a discharge nozzle. The arm support system is formed by the tail-to-head connection of a large arm, a middle arm and a small arm, which are in relative movement to one another. The tail end of the large arm is rotationally connected with the head end of the middle arm in horizontal rotation manner via a second horizontal rotation mechanism. The tail end of the middle arm is rotationally connected with the head end of the small arm via a pitching mechanism. The tail end of the small arm is connected with the discharge nozzle. Since the arm support system is capable of both horizontal rotation and pitching movement, the concrete distributor incorporates the horizontal operation and the vertical operation, integrates the advantages of the prior two types of concrete distributors, improves the single operation mode of the prior concrete distributor, and substantially overcomes the problems of the prior two types of concrete distributors.

The invention discloses a tracking controller and control method for enhancing the coupling nonlinearity of a three-dimensional bridge crane. The method includes the steps that the target trajectory xd and the target trajectory yd of a trolley are defined, a new stored-energy function is established by introducing two generalized signals xi x and xi y capable of reflecting the speed and load swing information of the trolley, and the tracking controller for enhancing the coupling nonlinearity is designed according to the derivative mode of the stored-energy function. The tracking controller and control method have the beneficial effects that the new stored-energy function is established by introducing the two generalized signals xi x and xi y capable of reflecting the speed and load swing information of the trolley, and the tracking controlling method for enhancing the coupling nonlinearity is provided according to the derivative mode of the stored-energy function, the target trajectory can be tracked and controlled, and the transient state control performance of the controller is improved by means of the method.

The invention particularly aims to the technical field of boiler air preheating. A disclosed air preheating and flue gas waste heat utilizing system comprises a flue gas channel (17), an air channel (20), an air preheater (9), a condensed water flue heat exchanger (8) and a condensed water air channel heat exchanger (19), and further comprises a condensed water feeding main pipe (15) and a condensed water returning main pipe (12); the flue gas channel (17) and the air channel (20) are connected with the air preheater (9); the condensed water flue heat exchanger (8) is arranged on the flue gas channel (17) at the back of the air preheater (9) in a flue gas flowing direction; the condensed water air channel heat exchanger (19) is arranged on the air channel (20) at the front of the air preheater (9) in an air flowing direction. According to the air preheating and flue gas waste heat utilizing system, flue gas discharge and heat exchange can be automatically adjusted according to change of operation conditions; on the premise of ensuring the safety of a heated surface and the regular operation of the system, the maximization of the heat circulation efficiency and the system economical efficiency is ensured.

The invention discloses a punching machine for bolt machining. The punching machine comprises a mounting plate and a machining seat. A base is arranged below the mounting plate. The two sides of the upper end of the base and the mounting plate are connected and fixed through supporting plates. A drive hydraulic cylinder is arranged in the middle of the upper end of the mounting plate. An output rod is arranged at the output end of the drive hydraulic cylinder. The lower end of the output rod is connected with a lifting sliding plate. The left end and the right end of the lifting sliding plateare in sliding contact with the supporting plates on the two sides. Two hanging plates are symmetrically arranged at the lower end of the lifting sliding plate. A rotating shaft is arranged between the hanging plates. The rotating shaft is rotationally provided with a rotating switching block. The punching machine is simple and reasonable in structure, by arranging a punch capable of being rotatedand switched and a lower mold capable of being replaced, machining on different bolts can be achieved by replacing a movable block, thus the defects of an existing device are overcome, and practicability is high.

The embodiment of the invention discloses a visual salience region detection method and device. The method comprises the following steps: firstly, selecting a plurality of candidate image region blocks for each pixel point from an image to be processed by a random search method, and then selecting a target image region block with the highest similarity to the pixel points from each candidate imageregion block; Calculating a visual saliency value of each pixel point according to similarity between each target image block and the pixel points; Generating a visual saliency map of each level of the image to be processed based on the visual saliency values of each pixel point of the image to be processed; Finally, according to the visual salience values of the two adjacent layers, calculatingthe weights of the visual salience maps of each layer, and fusing the visual salience maps of each layer according to the weights. The present application improves the calculation efficiency of the pixel point visual saliency value, thereby effectively improving the detection efficiency of the visual saliency region of the image to be processed, and can also improve the detection accuracy and precision of the visual saliency region in the image to be processed.

The invention discloses an infrared opposite-type coal mine conveyor adhesive tape anti-tearing protection method and device. An infrared emitter and an infrared receiver are installed on longitudinal beams on the two sides of a conveyor through lower fixing frames correspondingly; a coal receiving mechanism is arranged between upper adhesive tape and lower adhesive tape of the conveyor and comprises two coal receiving boards and one coal receiving tank; the two coal receiving boards are arranged obliquely, and the interval between the upper ends of the two coal receiving boards is greater than the interval between the lower ends of the two coal receiving boards; meanwhile, the lower ends of the two coal receiving boards are connected with the upper ends of the two sides of the coal receiving tank correspondingly; the coal receiving tank is rectangular, and the upper end of the coal receiving tank is open; a connection rod is arranged at the interval between the two ends of the two coal receiving boards; and the infrared emitter and the infrared receiver are located in the middles of the two ends of the two coal receiving boards correspondingly. The infrared sensors are used as collection elements to achieve all the functions of an original anti-tearing protection device, the defects of the original anti-tearing protection device are overcome, safe production of a mine is ensured, and investment of the production cost is reduced.

The invention discloses a pneumatic hydraulic corrugated pipe annular combination type wear-resisting ball valve, and belongs to inventions and creations in the aspect of special ball valves. The novel valve is developed to solve the prominent problems that a lock hopper valve and a lock slag valve used in an existing coal chemical industry device and a silicon powder valve of a polycrystalline silicon device are unstable in operation, short in service life and the like. According to the pneumatic hydraulic corrugated pipe annular combination type wear-resisting ball valve, each of an inner cavity of a left valve body and an inner cavity of a right valve body is provided with an annular multi-corrugated-pipe combined hydraulic pusher and a hydraulic sealing valve seat, each valve seat is designed to be a movable contact spherical surface and controls sealing through hydraulic pressure, in the rotation process of a ball body, friction is not generated between valve seat sealing rings and the spherical surfaces, only when the valve is closed, the sealing rings and the spherical surfaces are closed to form reliable sealing, and therefore, the service life of the valve is reliably guaranteed, and the valve opening and closing torque is small, so that operation is time-saving and labor-saving.

The invention relates to a method for preparing chicken essence from chicken breast and chicken skeleton. The method is characterized by comprising the following steps: smashing 15kg of chicken skeleton and 3kg of chicken breast by using a meat mincing machine with a pore diameter of 5mm; adding 3kg of water, uniformly stirring, heating to 55 DEG C to obtain a raw material mixed solution. The method is simple to operate; the raw materials are convenient to get; the ratio of the chicken breast and the chicken skeleton in the raw materials is changed; a manner of carrying out enzymolysis and aftertreatment by using targeted compound enzymes is adopted; the defects of enzymolysis of single substrate are solved; the prepared chicken essence is light in chicken flavor; the production cost is reduced.

The invention discloses a road crossing device for power grid construction. The road crossing device comprises vertical insulating members, vertical supporting members, an insulating crossbeam and wire passing wheels. Each side of the road crossing device comprises at least one vertical insulating member which is vertically overlapped and supported on the corresponding vertical supporting member. The tops of the vertical insulating members on two sides are connected through the insulating crossbeam. The wire passing wheels are mounted at the top of the insulating crossbeam. The vertical insulating members and the insulating crossbeam are formed by assembly of fiberglass epoxy resin tubes filled with foam inside. The vertical insulating members and the insulating crossbeam are formed by assembly of the fiberglass epoxy resin tubes filled with the foam inside, so that the defects of conventional materials such as moso bamboos, China firs and steel tubes in current crossing construction are overcome; new portable high-strength insulating materials are adopted, the weight is reduced to the greatest extent on the condition that strength requirements are met, and accordingly, transporting and mounting under bad conditions are facilitated.

The invention provides a method for returning a transfusion tube by simultaneously and correspondingly accepting pressure at two sides, belonging to the technical field of medical equipment. The transfusion tube comprises a spring plate which is jacked at the front side face of the transfusion tube and 12 shifting fork plates which slide in a slide way of the shell of a pump head to form a sine curve to extrude the back side face of the transfusion tube; the two sides of the transfusion tube among every two shifting fork plates are jointly provided with 22 returning pressure points which are arranged on the shell of the pump head to apply equal pressures to the two sides of the transfusion tube, wherein the pressure is equal to 0-0.7MPa, is in inverse proportion to the pressure of each shifting fork plate, and changes along with the pressure of the former adjoining shifting fork plate; when the pressure of each shifting fork plate is changed, the returning pressure points apply the equal pressures to the two side faces of the transfusion tube, wherein the pressures have inverse direction and are corresponding to each other; the dynamic process that the two side faces of the transfusion tube can simultaneously receive the continuously-changed sine curve pressure is formed; and the dynamic process that the two side faces of the transfusion tube can timely obtain the sine curve pressure is formed when the transfusion tube receives the pressures of the shifting fork plates, so that the transfusion tube can be timely returned and can not be fatigued. The transfusion tube can be used for transfusion and can be returned.

The invention belongs to the field of kitchen decoration construction, and relates to an integrated cupboard combination structure, in particular to a stable environment-friendly easy-to-use integrated cupboard which comprises a wall-hung cupboard fixed on a kitchen wall body, a floor cupboard placed against the kitchen wall body, an operation desk mounted on the floor cupboard, and a kitchen wall mounted on the surface of the kitchen wall body, and is characterized in that the operation desk comprises a vegetable washing region operation desk, a cutting region operation desk and a cooking region operation desk; the vegetable washing region operation desk, the cutting region operation desk and the cooking region operation desk are different in desk height or are distributed alternately according to different heights; a wall-hung cupboard brim is arranged at the top of the wall-hung cupboard and is used for supplying support tension force to the wall-hung cupboard in a vertical direction of the top of the wall-hung cupboard. The kitchen wall and the operation desk are obtained by splicing solid wood toothing plates, so that the stable environment-friendly easy-to-use integrated cupboard is smooth, firm and durable; the phenomenon that oil dirt is stacked in large gaps is eliminated, so that the stable environment-friendly easy-to-use integrated cupboard is easy to clear and clean; the invention solves drawbacks of the conventional cupboard from many aspects, provides a better and durable integrated cupboard for a kitchen, and has good market value.

The invention relates to a deep soil layering sampling device for soil survey and sampling. The device comprises a power component, a connecting member and a soil sampling member, wherein the soil sampling member is detachably connected at the lower end of the connecting member, and inside of the soil removing member is a hollow structure used for loading soil; the power member is detachably coupled to the upper end of the connecting member and applies power to the soil sampling member through the connecting member, thereby causing the soil sampling member to descend to a desired position in the soil to obtain a soil sample of a corresponding depth level; and a trench for facilitating the removal of soil inside is provided on the side wall of the soil sampling member. The invention has thebeneficial effects of developing a portable semi-automatic dynamic deep soil layering sampling device, which can completely acquire the soil profile layer, is suitable for deep soil sampling of soilunder various environmental conditions, and can perform quantitative treatment on sampling depth and soil quantity, thereby reducing the labor intensity, improving the accuracy and efficiency of soilsampling, and effectively solving the shortcomings of existing soil sampling methods and soil sampling devices.