68results about How to "Reduce or eliminate damage" patented technology

A heart valve delivery system is provided wherein a prosthetic valve is carried on a valve catheter inside a delivery sleeve. A step balloon protrudes from the delivery sleeve and provides a tapered surface for facilitating advancement through a body vessel. The step balloon also aids in crossing the leaflets of a native valve. After the prosthetic valve is positioned within the native valve, the delivery sleeve is retracted to expose the prosthetic valve. In one embodiment, the delivery sleeve is retracted by the use of a lead screw, which effectuates relative movement between the valve catheter and delivery sleeve. The prosthetic valve is preferably self-expandable. If necessary, the step balloon may be expanded to securely seat the prosthetic valve at the site of the native valve. The prosthetic valve is preferably coupled to the valve catheter by a plurality of flexible extension arms which allow the prosthetic valve to be collapsed after initial deployment such that the prosthetic valve may be repositioned if necessary.

The present invention provides compositions that may be useful, inter alia, in medical procedures, methods for making such compositions, and methods of performing medical procedures using such compositions. The present invention further provides a kit that includes a first container comprising a dispensing means and a first compound; and a second container comprising a dispensing means and a second compound, wherein the first compound may include, inter alia, a naturally occurring polyol, a biocompatible synthetic polyol, and mixtures thereof, and wherein the second compound may include, inter alia, isocyanate.

The invention discloses a three-dimensional composite friction pendulum vibration isolator based on a nonlinear energy trap. Structural vibration frequency is staggered away from seismic oscillation dominant frequency and a large amount of seismic oscillation input energy is absorbed by using the characteristics of attenuation and absorption of vibration energy, absorption of vibration frequency bandwidth and the like existing in the nonlinear energy trap as well as a vertical vibration isolation disk-shaped spring, so that the multi-dimensional seismic response of a structure is reduced, and seismic hazards of building structures are prevented. The three-dimensional composite friction pendulum vibration isolator comprises a metal sliding sleeve, a disk-shaped spring, a polytetrafluoroethylene sliding joint, a nonlinear energy trap and pile caps, wherein the disk-shaped spring is arranged in the metal sliding sleeve; the polytetrafluoroethylene sliding joint is arranged on the disk-shaped spring; the polytetrafluoroethylene sliding joint is in relative sliding contact with an upper pile cap through a polytetrafluoroethylene coating; the side face of the nonlinear energy trap is connected with the disk-shaped spring through a rigid spring; the nonlinear energy trap is in rolling contact with a lower pile cap through a rolling shaft; sliding surfaces of the upper and lower pile caps are spherical surfaces. The three-dimensional composite friction pendulum vibration isolator is used for resisting possible violent earthquakes.

The invention provides an omnidirectional movement unmanned driving platform method based on highway tunnel crack detection. The platform comprises a vehicle body and Mecanum wheels arranged at the bottom of the vehicle body. The Mecanum wheels are arranged at the bottom of the vehicle body through pressure springs. The pressure springs at the left side and the right side are configured in a reversed-V-shaped manner in which the pressure springs gradually incline outwards from top to bottom. The Mecanum wheels are connected with a motor in the vehicle body. The motor is connected with a motordriver. The motor driver is connected with a master control single-chip microcomputer. The master control single-chip microcomputer is connected with a computer, an ultrasonic module, a GPS and a nine-axis sensor module. The computer is connected with a laser radar (3) and a camera. The omnidirectional movement unmanned driving platform method has advantages of well settling problems of high speed, high efficiency and high automation in tunnel detection, realizing high significance, reducing wastage of a large amount of manpower and physical resource in highway tunnel crack detection, and greatly improving crack detection accuracy.

The invention provides a preparation method of a chiral isoxadifen-ethyl compound. The compound prepared by the method is a single enantiomer. The preparation method is simple, few in byproduct, highin product yield and wide in application prospect. In addition, the invention further provides a herbicide safener. The herbicide safener contains the chiral isoxadifen-ethyl compound serving as an active ingredient, so that application range of herbicide can be expanded effectively.

The invention discloses a health-care food with effects of improving eyesight and reinforcing intelligence, and belongs to the technical field of health-care foods. The health-care food comprises the following raw materials in parts by weight: 100-600 parts of a needle mushroom extract, 150-500 parts of a Europe blueberry extract, 80-260 parts of a ginkgo leaf extract, 100-400 parts of soyabean lecithin, 50-200 parts of taurine, 80-400 parts of DHA, 0.5-5 parts of VB1, 0.5-5 parts of VB2, 5-20 parts of VB3, 0.25-0.8 part of VA and 5-80 parts of VE. The raw materials are organically combined, so that various different effect components are fused into a product, and the components are matched and coordinated; nutrition is complemented and organisms are conditioned in a systematical and comprehensive manner; and the health-care effects of realizing two functions of improving the memory and relieving the eyesight fatigue are achieved.

The invention relates to a selenium-rich chewing gum. The selenium-rich chewing gum is characterized in that Kappa-selenocarrageenan is added into a chewing gum matrix to supplement 50-200mu g of organic selenium for normal people through chewing every day. According to the selenium-rich chewing gum provided by the invention, the chewing gum is taken as a carrier for supplementing selenium, the concept is novel, the mode of usually taking selenium-containing tablets and capsules by people is broken through, the selenium-rich chewing gum is very convenient to take and carry, Kappa-selenocarrageenan is added into the chewing gum matrix to prepare the selenium-rich chewing gum, Kappa-selenocarrageenan is slowly dissolved in saliva of the people and absorbed during the process that people chew the chewing gum and then, the selenium supplement for people is simple, convenient and direct; furthermore, the price is low and the selenium-rich chewing gum is easily accepted by the people.

The invention provides a method for preparing a free layer of a magnetic tunnel junction and a method for preparing a magnetic tunnel junction. The method for preparing a free layer of a magnetic tunnel junction includes the steps of setting the films of a free layer through a deposition process, carrying out first plasma treatment on one or more of the films, and carrying out first annealing treatment on the one or more of the films after the first plasma treatment. As in-situ heat treatment is carried out on the one or more films after the first plasma treatment through the first annealing treatment, possible damage or defects caused by the first plasma treatment can be reduced or eliminated, and the surface characteristic of the free layer can be improved. Therefore, the comprehensive performance of a magnetic tunnel junction comprising the free layer can be improved, for example, the TMR value of the magnetic tunnel junction can be improved, and the RA value can be reduced.

The invention belongs to the technical field of jacks, and particularly relates to a jack for a vulnerable part. The jack comprises a base B, lower support arms, upper support arms, a hinge block A, ascrew rod A, a screw rod B and the like, wherein the two lower support arms distributed symmetrically are hinged with the two upper support arms separately; and the ends, which are not hinged with the corresponding upper support arms, of the two lower support arms are hinged with the base B. According to the jack, the situation that the position of an elastic cushion of a traditional shear jack needs to be regulated repeatedly and consequently fatigue deformation of a vehicle body or equipment occurs due to repeated effects on the vulnerable part which must be supported is avoided effectively; in the regulation process of the elastic cushion, reciprocating lifting of the local part of the vehicle body or the equipment is not required, while the vulnerable part of the vehicle body or the equipment is kept unmoved locally all the time; and the vehicle body or the equipment is prevented from being damaged due to reciprocating lifting of the vulnerable part.

Compositions and methods of phytopathogenic fungus control are provided, the compositions and methods include a first component of dissolved organic matter (DOM) concentrate having natural organic matter of defined composition, suitable for soil, foliar, and seed coating.

The invention relates to the technical field of textile machines, in particular to a cage type cotton removing and tiny dust removing machine, which has a good tiny dust removing effect and is high in cotton discharging quality and low in failure rate. The machine comprises an upper box body (1), wherein a raw cotton inlet pipe (4) of which one side is provided with a raw cotton inlet (3) is arranged in the center of the top of the upper box body, and a dust removing cage (5) which is communicated with the top of the upper box body (1) is arranged in the internal center of the upper box body; a cotton inlet fan (6) is arranged on one side of the raw cotton inlet pipe (4); a port at one end of the raw cotton inlet pipe, which is extended into the upper box body, is provided with a rotating device; a tiny dust filtering chamber (7) is formed in an internal space of the dust removing cage (5); a tiny dust collecting chamber (8) is formed between the tiny dust filtering chamber (7) and the inner wall of the upper box body (1); a middle section cotton collecting chamber (9) which is connected with the tiny dust filtering chamber (7) is formed on the top of a lower box body (2); and a cotton discharging pipe (10) connected with the outlet of the middle section cotton collecting chamber (9), a dust collecting groove (11) connected with the outlet of the tiny dust collecting chamber (8) and a dust discharging air pipe (12) connected with the outlet of the dust collecting groove (11) are arranged at the bottom of the lower box body (2).

The invention belongs to the technical field of animal feeds, and specifically relates to a traditional Chinese medicine containing feed for the livestock and poultry and a preparation method thereof. The livestock and poultry feed is prepared from a feed, traditional Chinese medicine liquid, fructose, and ethyl maltol according to a weight ratio of 100:5-10:0.5-1:0.01-0.05; wherein the feed comprises the following raw materials in parts by weight: 20 to 30 parts of corn, 15 to 20 parts of soybean meal, 15 to 25 parts of wheat bran, and 5 to 10 parts of seaweed meal, and the traditional Chinese medicine liquid comprises the following raw materials in parts by weight: 16 to 25 parts of eucommia, 10 to 20 parts of pine needle, 15 to 25 parts of radix codonopsis, 8 to 15 parts of purslane, 15 to 25 parts of Chinese magnoliavine, 10 to 15 parts of haw, and 10 to 15 parts of dried orange peel. The feed is palatable, can enhance the disease resistant performance of livestock and poultry, and prominently promotes the weight gain of livestock and poultry. The feed utilization rate is largely improved. The production cost is reduced.

The invention discloses an identification device for a high-temperature tank. An RFID (Radio Frequency Identification Device) damping structure and a buffering cushion at the connected part are arranged in the identification device, so that the impact and the vibration which are possibly applied to the axial direction, the circumferential direction and the radial direction of an RFID tag in the operation process can be effectively reduced, and further the working reliability of the tag is improved, and the service life of the tag is prolonged. By improving the material of a casing 5, the integral heat resistance of the device can be further improved; meanwhile, an iron plate with the thickness of 1mm is arranged on the casing to replace a cover plate in the prior art, so the practices prove that the intensity of a communication signal of the RFID tag can be effectively improved.

Disclosed is a Chinese medicament for treating hypertension which is prepared from the following raw materials: evodia rutaecarpa 10-90g, pinellia tuber 10-40g, hooked uncaria 10-80g, sulfur 10-35g, Loranthus mulberry mistletoe 10-42g, lodestone 10-48g, Ligusticum wallichii 10-90g, chrysanthemum flower 10-80g, wofberry bark 10-65g, kudzuvine root 10-80g, riddle 10-48g, cassia twig 10-26g, malt 10-33g, earthworm 10-80g, alisol 10-65g, rhubarb horsetails 10-65g, sphene 10-45g, soybean 10-90g, eucommia bark 10-80g, trogopterus dung 10-42g, cattail pollen 10-42g, haw 10-50g, areca-nut 10-42g, weeping-willow leaves 10-90g and nifedipine 2-3g.

The invention provides a method for preparing a reference layer of a magnetic tunnel junction and a method for preparing a magnetic tunnel junction. The method for preparing a reference layer of a magnetic tunnel junction includes the steps of setting the films of a reference layer through a deposition process, carrying out plasma treatment on one or more of the films, and carrying out annealing treatment on the one or more of the films after the plasma treatment. As in-situ heat treatment is carried out on the one or more films after the plasma treatment through the annealing treatment, possible damage or defects caused by the plasma treatment can be reduced or eliminated, and the surface characteristic of the reference layer can be improved. Therefore, the comprehensive performance of amagnetic tunnel junction comprising the reference layer can be improved, for example, the TMR value of the magnetic tunnel junction can be improved, and the RA value can be reduced.

The invention discloses a floating base substrate and method for chip semiconductor testing. The floating base substrate at least comprises a substrate provided with at least one same detection cavity, wherein the radius of the upper opening of each detection cavity is greater than the radius of the lower opening, a welding ball used for accommodating to-be-detected products, at least one test probe fixed to the base and adopting an elastic telescopic rod structure, wherein the tops of the test probes can extend into the detection cavity and can move up and down, and the base can be driven tomove up and down by the test probes. Power testing can be conducted by test probe being contact with welding ball. When the detected welding ball falling off caused by virtual welding defect is extruded and deformed, sequential testing is conducted, and whether the welding ball is normal is judged according to the damage surface. The structural model is based on spherical contact array package andvirtual welding. The damage risk of the welding ball is determined by calculating spherical contact array package parameters and mechanical interference of the design size of floating base.