37results about How to "Appropriate length" patented technology

A zoom lens for a projection display device includes, in order from the enlarging side, a first lens group having negative refractive power and that is stationary during zooming, second and third lens groups having positive refractive power, a fourth lens group that has refractive power that is much weaker in absolute value than the refractive powers of the other lens groups, and a fifth lens group having positive refractive power and that is stationary during zooming. The second, third, and fourth lens groups move with coordinated movements continuously toward the enlarging side during zooming from the wide-angle end to the telephoto end of the zoom range. The zoom lens satisfies certain conditions related to focal lengths of the zoom lens and lens groups and distances along the optical axis. A projection display device uses the zoom lens.

A rotary furnace hearth wherein a hearth carriage carrying a hearth comprises a plurality of hearth carriages respectively having propulsion systems, wherein adjoining hearth carriages are coupled by coupling bolts and nuts via spacers interspaced in a single row in a horizontal plane, whereby even if the hearth carriages deform due to heat at the time of operation, they are structured to be able to freely deform without mutual constraint in the event of curved deformation, so the hearth carriages are maintained in individually stable states at all times.

The invention relates to a method for cultivating cut chrysanthemum. The method comprises a step of using daminozide (B9) to treat cut chrysanthemum. The cut chrysanthemum cultivated by use of the method has suitable pedicel length between 1.6 and 2.0 cm, as well as graceful shape and excellent quality. Moreover, the method has the characteristics of low cost and high operability, and is easy to popularize and apply in the cultivation of cut chrysanthemum.

The invention relates to the field of spinning thread traction, in particular to a spinning thread traction device. The spinning thread traction device comprises a rack and further comprises an unreeling wheel and a reeling wheel which are rotationally connected with the rack. A disc is arranged between the unreeling wheel and the reeling wheel and fixedly connected with a sliding piece which is vertically in sliding connection with the rack. A drive piece fixed to the rack is arranged below the sliding piece, and an output shaft of the drive piece is coaxially connected with a cam abutting against the bottom of the sliding piece. A crank and rocker mechanism capable of driving the reeling wheel to rotate is hinged to the sliding piece, a reeling shaft of the reeling wheel is rotationallyconnected with the rack, and a one-way bearing is arranged at the connecting position. The scheme is adopted for spinning thread traction, and spinning thread fracture can be avoided.

The invention belongs to an embedded system file processing method. The invention particularly relates to a Hex file processing method and application. The method comprises the following steps: step 1, grouping Blocks of a Hex file, each group comprising at least one Block, performing CRC check on a specified address field of each group of Blocks to obtain a corresponding CRC check code, and putting the CRC check code into a specified address position, namely a CRC placement address, according to an Intel format; wherein the specified address field does not contain a CRC placement address; step 2, encrypting a data domain in each Record, and setting a corresponding decryption program in a controller pre-flashed by the Hex file; step 3, recalculating the checksum of each encrypted Record; step 4, flashing the processed Hex file into the pre-flashed controller, and decrypting the pre-flashed controller through a decryption program; and step 5, accounting the CRC check code by the pre-flashed controller. By means of the Hex file processing method, the problem that in the prior art, a file in the Hex format is directly used for program flashing, and a program is prone to being crackedor rewritten due to data outflow is solved.

Provided are a rear converter lens and an imaging apparatus capable of achieving favorable optical performance and an appropriate back focal length with high magnification. The rear converter lens RCL consists of, in order from the object side, four lens-groups of positive, negative, negative, and positive lens-groups. In order from the object side, a first lens-group RG1 consists of a negative lens RL11 and a positive lens RL12, a second lens-group RG2 consists of a negative lens RL21 and a positive lens RL22, a third lens-group RG3 consists of a negative lens RL31, a positive lens RL32, and a negative lens RL33, and a fourth lens-group RG4 consists of a biconvex lens RL41 and a negative lens RL42. Here, 0.22<cf / f12<1 is satisfied, where f12 is a composite focal length of the first lens-group RG1 and the second lens-group RG2, and cf is a focal length of the rear converter lens RCL.

A needle-like strontium carbonate fine powder which is a fine powder of needle-like strontium carbonate particles, and which has an average major axis length of 150 nm or less, an average aspect ratio of 1.5 or more, and a content of needle-like particles each having a major axis length of 200 nm or more of 5% or less in terms of the number of particles, said fine powder being characterized in that the surface of each of the needle-like strontium carbonate particles is treated with (A) a polycarboxylic acid having a polyoxyalkylene group in a side chain thereof or an anhydride of the polycarboxylic acid and (B) a compound having a hydrophilic group and a hydrophobic group and also having a group capable of forming an anion in water. The needle-like strontium carbonate fine powder has excellent dispersibility in a hydrophobic organic solvent or a polymeric resin solution prepared by dissolving a polymeric resin in a hydrophobic organic solvent.

The present invention discloses graduated guide pin for selecting an optimal length of a screw for connecting a fractured bone. The guide pin (10) is a base material (11) which is divided at specific interval and made of radiotransparent metal. Circumferential fixation materials (12) made of radioopaque metal are mounted in the zones of every two dividing. The base material (11) is made of titanium or titanium alloy which are easy to be transmitted by radioactive rays, and the circumferential fixation material is made of platinum, iridium, tungsten, tantalum, and gold or the alloys thereof which are hard to be transmitted by radioactive rays. In X-ray images which are shot by transmission X-ray or X-ray, the guide pin (10) reflects the dark parts which are formed by the circumferential fixation materials (12) and the light part which are formed by the base material (11) at specific intervals in an alternating manner, so that the thickness of the bone (B) including the fractured bone is obtained, through counting the scales formed by the dark parts and the light parts in the bone (B).

The invention discloses a rapid detection method of blood pathogenic bacteria based on CE-SSCP (Capillary Electrophoresis-Single Strand Conformation Polymorphism). In the rapid detection method, specific to conserved regions of 16SrRNA genes of staphylococcus aureus, escherichia coli, pseudomonas aeruginosa, staphylococcus epidermidis, klebsiella pneumoniae, enterococcus faecalis and streptococcus pneumoniae which are infected by blood, a corresponding PCR (Polymerase Chain Reaction) general primer is designed and subjected to fluorescence labeling, and then PCR is adopted to carry out amplification and electrophoresis detection on pathogenic bacteria in a blood sample, wherein the length of the designed general primer is suitable to the span of the amplification and has high complementary degree with the DNA of a pathogenic bacteria template in the blood sample to be tested, which enables an amplification product to have good specificity and favorable suitability to same kind of bacterium of different bacterial strains. The method has good repeatability and high sensitivity, can detect trace amount of the DNA of a pathogenic bacteria genome and is very suitable to wide application clinically.

The invention relates to the field of spinning thread traction, in particular to a spinning thread traction device. The spinning thread traction device comprises a rack and further comprises an unreeling wheel and a reeling wheel which are rotationally connected with the rack. A disc is arranged between the unreeling wheel and the reeling wheel and fixedly connected with a sliding piece which is vertically in sliding connection with the rack. A drive piece fixed to the rack is arranged below the sliding piece, and an output shaft of the drive piece is coaxially connected with a cam abutting against the bottom of the sliding piece. A crank and rocker mechanism capable of driving the reeling wheel to rotate is hinged to the sliding piece, a reeling shaft of the reeling wheel is rotationallyconnected with the rack, and a one-way bearing is arranged at the connecting position. The scheme is adopted for spinning thread traction, and spinning thread fracture can be avoided.

The invention discloses a method for quickly detecting pathogenic bacteria in blood based on a machine code recognition technology, comprising the following steps of: designing corresponding universal primers aiming at conserved regions of 16SrDNA and 23SrDNA of Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus epidermidis, Klebsiella pneumoniae, Enterococcus faecalis and Streptococcus pneumoniae infected by blood, and carrying out fluorescence labeling; then, respectively carrying out PCR (Polymerase Chain Reaction) amplification and CE-SSCP (Capillary Electrophoresis Single-Strand Conformation Polymorphism) detection on the DNA of the reference cultures of the seven pathogenic bacteria and the genome DNA of the bacteria of the blood sample to be detected byadopting PCR reaction; and recognizing the detection results by machine codes (binary and decimal codes), and carrying out comparison. The detection method has good repeatability and high sensitivity, can detect the trace genome DNA of pathogenic bacteria, has obvious detection results, and is very suitable for wide application in clinic.

The invention discloses a device for hoisting an equipment mounting frame. The device comprises a cross beam, wherein a lifting appliance arm is welded at one end of the cross beam, an inverted V shaped curved surface is formed on the upper top surface of the cross beam, a hook I is connected with the highest point of the inverted V shaped curved surface of the cross beam, the lifting appliance arm is of an I shaped structure formed by two long beams and one short beam, a plurality of connecting holes are formed in the short beam, a plurality of abrasion-proof rods are horizontally fixed on the short beam and are located just under the connecting holes in one-to-one correspondance, a hoisting rope passes through any one connecting hole in the short beam and the underside of the hoisting rope is connected with a hook II, the hook II is fixedly connected with a hanger, and the hanger is in bolt connection with the mounting frame. The device can ensure the levelness and the perpendicularity of the mounting frame unchanged in a hoisting process; the cross beam is of a stable triangle structure, a lightening hole can eliminate partial stress, the four corners of the mounting frame are perpendicularly hoisted by virtue of the length of the cross beam, and the length of the hoisting rope is appropriate, so that the stability and the balance of the whole mounting frame are ensured, and the design requirements on the levelness and the perpendicularity of a machine are met.

The invention relates to a frame for moving a tower. Wheels are arranged at the bottom of the frame. The frame is characterized in that a main support leg oil cylinder is arranged at the bottom of the frame; when the main support leg oil cylinder is propped up, the wheels leave from the ground; two girders are arranged on two sides of the frame; each girder is hinged, supported and connected witha frame auxiliary supporting leg by an auxiliary supporting leg pin roll; an auxiliary supporting leg oil cylinder is arranged on the frame auxiliary supporting leg; and a frame connecting and fixingplate for fixing the frame auxiliary supporting legs is welded on the frame. The invention has ingenious, compact and reasonable structure and can realize the integral movement of the tower; equipment on the tower is free from being detached and the mutual positions during original work can be maintained in the process of moving; rotatably-foldable frame auxiliary supporting legs are arranged on the frame and can ensure that the gravity center of the tower is stable during turning over; and after the frame auxiliary supporting legs are folded, the length of the frame is proper and the frame is convenient for integral moving, moving and transiting.

The invention relates to a tower whole movement lifting device, which comprises a tower, a main frame, a pipe bending cylinder, and a lifting cylinder. One side on the lower part of the tower is connected with a tower primary leg through a primary leg pin roll hinge support; the bottom of the main frame is provided with a primary leg cylinder; the rear of the main frame is connected with a tower auxiliary leg through a tower pin roll hinge support; the lifting cylinder is arranged on the middle rear of the main frame; the lower end of the lifting cylinder is connected to the main frame through a hinge support, while the upper end is connected to the lower part of the tower through a hinge support; the pipe bending cylinder is arranged on the middle front of the main frame; the lower end of the pipe bending cylinder is connected to the main frame through a hinge support, while the upper end is provided with a bulb; and the bulb is matched with a jacking nest on the middle top of the tower. The device has a smart, compact and reasonable structure, adopts full hydraulic control to lift, and can independently complete whole overturn without assistance of other hoisting equipment.