53results about How to "Exempt from using" patented technology

The invention discloses a novel reaction system for rapidly constructing a plant gene site-directed knockout carrier. The system comprises 1) based on a CRISPR-Cas system carrier, the carrier comprises the DNA molecules having the following characteristics: an agrobacterium infection method is used for carrier conversion to the plant, a carrier capable of simultaneously realizing driving of SgRNA by an OsU3 promoter for transcription and driving of Cas9 protein by an Ubiquitin promoter for expression; 2) restriction enzyme AarI; 3) buffer and Oligo required by a reaction of the restriction enzyme AarI; 4) target gene site specific DNA double chain; and 5) T4DNA ligase and ATP required by an enzyme reaction. The system only requires 5-10 reaction cycles for rapidly and efficiently completing a construction process of plasmid, greatly simplify the operation flow, and satisfies the requirement of rapid construction with high flux for plant gene site-directed knockout plasmid.

The invention provides a cooling air path system of an unmanned aerial vehicle. The cooling air path system comprises an airflow source, air guiding holes, an air path and air outlets, wherein the airflow source is generated by rotation of paddles on all vehicle arms, the air guiding holes are formed in the portions, corresponding to paddle tail rotating areas, of the top faces of all the vehicle arms, the air path is a gap channel between the inner wall of a vehicle body and internal modules of the vehicle body, and the air outlets are formed in the position, corresponding to a heating source area, of the bottom of the vehicle body. The airflow source guides airflow into the inner sides of the vehicle arms through the air guiding holes, and the airflow enters the air path, flows through the heating source area and then is exhausted from the air outlets. The cooling air path system of the unmanned aerial vehicle is good in whole vehicle cooling performance and low in noise.

The invention provides an integral casing centralizer and a manufacturing method thereof, belonging to the field of oil and gas well cementing. The integral casing centralizer is processed by uniform wall thickness material pipe or plate, including hoops at both ends, and limbs located between the hoops at both ends; the limbs are evenly distributed on the circumference, and each The two ends of each limb are respectively connected with the hoops at both ends; each limb is arched outward; the outer diameter of the centralizer formed by all the limbs is smaller than or equal to the inner diameter of the upper casing.

The invention relates to a computer radiating system which comprises a case. The case comprises a casing and a radiating assembly. The radiating assembly comprises a water channel, a water feeding pipe, a water tank, a water discharging pipe, a water flow adjusting assembly, a cooling plate and a fin group. The water discharging pipe and the water flow adjusting assembly are arranged on two sides of the water tank. The water flow adjusting assembly comprises a round water pipe and a partition plate. The partition plate is arranged in the water pipe, the middle axis of the water pipe is located on the plane of the partition plate, one side of the partition plate is connected with the pipe wall of the water pipe in a sealing mode, a gap is formed between the other side of the partition plate and the pipe wall of the water pipe, a water inlet and a water outlet are arranged in the water pipe on two sides of the partition plate, the water inlet is connected with the water feeding pipe, and the water outlet is communicated with a cooling cavity. The computer radiating system adopts the waterfall type water cooling mode to conduct heat exchange in the case, improves the computer radiating speed, omits a fan, reduces noise, omits air ports, and achieves a good dustproof effect.

The invention relates to the technical field of showcases, in particular to a transmission open type showcase, thereby solving defects in the prior art. The transmission open type showcase comprises acabinet body having a cavity structure. A sliding glass door is slidably arranged on the inner wall of the cabinet body; a connecting plate is fixed to the bottom of the sliding glass door through countersunk bolts. A supporting base is fixed to the inner wall of the cabinet body through bolts. One side of the supporting base is movably connected with a cylinder mounting base through a pin shaft;an oscillating cylinder is fixedly mounted on one side of the cylinder mounting base through a bolt; and a piston rod is arranged in the oscillating cylinder. With the oscillating cylinder, a limiting baffle and the like, the glass door is pushed to be opened and closed through air cylinder transmission, the moving stroke of the glass door can be limited through the limiting baffle, so that the sealing performance of the showcase can be effectively kept while collision with the showcase body is avoided; the glass door can be automatically locked through the self-locking characteristic of theair cylinder, so that the showcase is more attractive and convenient to operate.

Provided is a synthetic method of a micromolecule pickling auxiliary tanning agent. Aniline-2,5-disulfonic acid and glyoxylic acid are added into a reactor provided with a stirrer, a thermometer and a reflux condensing tube and then are stirred evenly at a normal temperature, then the pH of the system is adjusted to be 4-5 through alkaline water, the temperature of the system is increased to 90-100 DEG C, reaction is conducted for 6 hours, the system is cooled to be at the normal temperature, the solid content is controlled to be 50% through distilled water, and then the micromolecule pickling auxiliary tanning agent is obtained. By the adoption of the pickling auxiliary tanning agent, high-exhaustion chrome tanning is achieved in the process of achieving less-acid salt-free pickling.

The invention discloses a panoramic head positioning method, a panoramic head positioning system and an operation method of the panoramic head positioning system. The positioning method comprises thefollowing steps: selecting a dental arch form to determine rotation track data; acquiring and analyzing two-dimensional image data of the head of the patient at each angle, calculating to obtain target depth data and point cloud at each angle, and recovering a three-dimensional surface structure of the head; registering the point cloud at each angle to obtain complete point cloud three-dimensionaldata, and determining the positions of the jaw and the mouth and the position and posture of the head; adjusting the radiation source and the detector according to the position and posture of the head to enable the face of the head to directly face the radiation source or the detector; acquiring position data of the nozzle and calculating a rotary motion starting point of the ray source and the detector; calculating moving track data according to the rotating track data and the rotating motion starting point; controlling the ray source to emit rays while controlling the ray source and the detector to move according to the movement track data, and controlling the detector to receive the rays; and processing the projection data acquired by the detector through a panoramic reconstruction algorithm to obtain a panoramic image.

The invention discloses a flexible packaging film for a lithium ion battery. The flexible packaging film comprises a cast polypropylene film layer, a first adhesive layer, a first rigid protective layer, a high molecular insulation middle cell fixing layer, a second rigid protective layer, a second adhesive layer and a polyester resin layer, wherein the first rigid protective layer and the secondrigid protective layer are thermally pressed on the two side surfaces of the high molecular insulation middle cell fixing layer respectively; the cast polypropylene film layer is adhered to the firstrigid protective layer through the first adhesive layer; and the polyester resin layer is adhered to the second rigid protective layer through the second adhesive layer. Therefore, the overall structure of the flexible packaging film of the lithium ion battery has good ductility and hardness; the formability is better; the use of a conductive material-aluminum foil is avoided; the possibilities ofshort-circuiting the packaging film and a negative electrode sheet and forming an ion channel and an electron channel are avoided; the possibility of electrochemical corrosion of the soft package lithium ion battery is avoided; and the safety and reliability of the soft package lithium ion battery are greatly improved.

The invention discloses a new type of intelligent office desk, which comprises a desktop, which includes a first desktop and a second desktop, the first desktop and the second desktop are movably connected, so that the desktop is L-shaped; a table body, which includes the first table body and the second table body, a telescopic shaft is arranged between the first desktop and the first table body, the upper layer of the second table body is a drawer, and the lower layer is a door-type storage area; table legs; including a touch screen, a wireless microphone, a camera and a host An intelligent office system; a driving mechanism, which is respectively connected with the telescopic shaft, the touch display screen and the host. Through the built-in intelligent office system on the desktop, various notification files can be displayed through the touch screen on the desktop, which reduces the use of paper and makes communication among employees more convenient, thus improving the office efficiency of employees. The height and inclination angle of the desktop can be adjusted to meet the usage habits of different users, making the office more comfortable and convenient.

An alternating-current drive circuit of an LED streetlight comprises an input end, a lightning protection circuit, a rectification circuit and a parallel chip control circuit. The input end is connected with the lightning protection circuit which is connected with the rectification circuit, the rectification circuit is connected with the parallel chip control circuit, and a plurality of LED string light sources are connected to the parallel chip control circuit. The alternating-current drive circuit is simple and reasonable in structure, convenient to use, good in effect and easy to promote; circuit structure is simplified, quantity of elements is reduced, design difficulty is lowered, switch transformer and electrolytic capacitor are omitted, electromagnetic radiation generated by the switch transformer is avoided, service life of the LED drive circuit is prolonged, service life of the overall power supply and lamp is prolonged, the drive circuit can be welded to a lamp panel to realize integration of the two, a power supply casing is omitted, and space occupation of the drive circuit is reduced.

The invention relates to an assembling method of a circular track crane and the circular track crane. The assembling method of the circular track crane comprises the following steps that an arm frame and a mast are transversely placed on a base plate, the first end of the arm frame is hinged to the base plate, the second end of the arm frame is suspended, the first end of the mast is hinged to the base plate, and the second end of the mast is suspended; an auxiliary support is vertically arranged on the base plate, and the auxiliary support upwards supports a steel wire rope connected between the second end of the mast and the second end of the arm frame; the steel wire rope is shrunk, the second end of the mast is lifted under the tension action of the steel wire rope due to the fact that the weight of the arm frame is larger than that of the mast, when the second end of the mast is lifted to the first height, the steel wire rope is separated from the auxiliary support, and when the second end of the mast is lifted to the second height, hoisting of the mast is completed; and the second height is greater than the first height. A mast self-lifting mode is adopted, so that the use of a plurality of large auxiliary cranes is avoided, the disassembly and assembly cost is reduced, and the disassembly and assembly efficiency is improved.

The invention relates to a river sewage treatment device. The river sewage treatment device comprises a plurality of water purification plant cultivation systems arranged between two lateral river channels, wherein a river bottom oxygen supplying system is arranged between the adjacent water purification plant cultivation systems; the river bottom oxygen supplying system comprises four supportingframes; each supporting frame comprises a base and a supporting sleeve connected with the base, and a supporting rod is inserted into each supporting sleeve; a fixed rod is connected with one side ofeach supporting rod and a rotary sleeve sleeves each fixed rod; a traction rope is wound on each rotary sleeve; one end of each traction rope is connected with a loading assembly and the other end ofeach traction rope is connected with one corner of a sewage treatment net; the end parts of the four traction ropes are connected with four corners of the sewage treatment net and the sewage treatmentnet is dragged and stretched; the sewage treatment net is provided with a plurality of submerged plant cultivation units; each submerged plant cultivation unit comprises a base arranged on the sewagetreatment net; a plant planting pot is arranged in a groove in each base; a screw rod is connected between the bottom part of each plant planting pot and the corresponding base; fixed screw caps arefastened at two ends of each screw rod. The river sewage treatment device has strong sewage treatment persistence.

The drilling method for the single-sided board comprises the following steps that S101, a base plate is placed on a drilling table top, the single-sided board is placed on the base plate, the single-sided board is fixed to the drilling table top, and the copper face of the single-sided board faces the base plate; and S201, drilling is conducted on the single-sided board placed on the base plate, and a drill bit feeds from one side of the medium face of the single-sided board. According to the single-sided board machined through the drilling method, burrs generated after drilling are all located on the medium face of the single-sided board, and due to the fact that the medium face of the single-sided board is not provided with wires and copper, even if the burrs on the medium face of the single-sided board need to be polished subsequently, the wires are not prone to being damaged in the polishing process, and the service life of the single-sided board is prolonged. Therefore, the quality of the single-sided board after drilling is ensured. And moreover, the use of an aluminum sheet is avoided, so that the processing efficiency is improved, the quality is ensured, and the cost of a drilling procedure is greatly reduced.

The invention provides a filter screen mounting structure, a fan assembly and a range hood. The filter screen mounting structure comprises a motor and a filter screen assembly detachably mounted on amotor shaft of the motor. The filter screen mounting structure further comprises a first magnetic part arranged on the filter screen assembly, a second magnetic part arranged on the motor shaft and alimiting part arranged on the motor shaft. The first magnetic part and the second magnetic part are arranged oppositely. After the filter screen assembly arrives at a preset mounting position, the first magnetic part is located below the second magnetic part and is in a homopolar mutual repulsion state. The filter screen assembly is connected to the limiting part in an abutting manner under the action of repulsion force. By means of the filter screen mounting structure, repulsion force between same magnetic poles is utilized, and demounting and mounting to the filter screen assembly are facilitated.

The invention discloses a self-heat-preservation double-formwork composite wall structure and a composite wall comprising the same. The self-heat-preservation double-formwork composite wall structurecomprises an inner formwork, an outer formwork and a plurality of connecting ribs, wherein the outer formwork comprises a first surface protection layer, a first A-level fireproof heat preservation material layer and a first reinforcing net rack; the first surface protection layer is connected to the side, back on to the inner formwork, in the first A-level fireproof heat preservation material layer; the first reinforcing net rack is arranged in the first A-level fireproof heat preservation material layer; the plurality of connecting ribs are all positioned between the first A-level fireproofheat preservation material layer and the inner formwork; and the two ends of each connecting rib are connected to the inner formwork and the first reinforcing net rack correspondingly. The structuralstrength requirement and heat preservation performance of the self-heat-preservation double-formwork composite wall structure can be met; and meanwhile, the overall thickness is remarkably reduced, awall supporting system is omitted in the construction process, the prefabrication process and the construction process are further optimized, and effective application and popularization of the composite wall technology are better facilitated.