34results about How to "Good alternative" patented technology

A bone resection tool for resecting an end of a bone along a surface having a curvature comprises a guide, a cutting tool and a track follower. The guide is configured to be removably attached in a fixed position to the end of the bone. The guide is configured to include a track exhibiting a curvature generally corresponding to the curvature of the surface to be resected in the bone. The cutting tool includes a cutting face. The track follower is configured to couple to the cutting tool and cooperate with the track to facilitate reciprocation of the cutting tool relative to the guide to induce the cutting face to resect the bone along the surface having the curvature. A method for cutting a bone along a curved surface conforming to the curvature of a curved surface of the underside of a prosthetic component comprises the steps of incising the tissue surrounding the surface of the bone, positioning a guide alongside the surface of a bone to be cut, affixing the guide to the bone, interconnecting a cutter having a cutting face with the guide, maintaining the cutting face generally parallel to the tangent of the curved surface and traversing the cutting face along the bone while guiding the cutter along the track. The tissue incision incises the tissue surrounding the surface of the bone to be cut in a minimally invasive fashion. The positioned guide includes a track configured to assimilate the curvature of the curved surface of the underside of the prosthetic component.

The invention discloses a graphene composite film for heat dissipation and a preparation method thereof. Surfaces of multiply layers of polymer films are coated with graphene slurry in advance, the coated polymer films are placed in a stacked manner for baking, and the graphene composite film with high heat dissipation efficiency is prepared while carbonization and graphitization temperatures and time are reduced by the aid of high-temperature carbonization and graphitization under the nucleation induction action of the graphene in the carbonization and graphitization process. Compared with similar heat-dissipation graphite film materials in the market, the graphene composite film prepared with the method has the advantages that the preparation temperature is lower, the forming time is shorter, the energy consumption is lower, and the graphene composite film can be well applied to electronic devices, LED lamps and liquid crystal display products with high heat quantity and can well replace existing heat-dissipation film materials.

The invention provides a veterinary follicle-stimulating hormone analogue and a preparation method thereof. A connecting sequence is designed according to length, foldability, hydrophobicity and charge effect of a connecting sequence between an alpha peptide chain and a beta peptide chain, the corresponding nucleotide sequence of the connecting sequence is any one of SEQ ID NO:2, SEQ ID NO:3, SEQ ID NO:4, SEQ ID NO:5, SEQ ID NO:6, SEQ ID NO:7, SEQ ID NO:8, SEQ ID NO:9, SEQ ID NO:10, SEQ ID NO:11, SEQ ID NO:12, SEQ ID NO:13, SEQ ID NO:14, SEQ ID NO:15, SEQ ID NO:16, SEQ ID NO:17, SEQ ID NO:18, SEQ ID NO:19 and SEQ ID NO:20, and respective expression quantity and biological activity are compared by virtue of the study. A fused protein of the prepared veterinary follicle-stimulating hormone analogue is similar to the known fused protein in term of biological functions, the expression quantity of multiple fused proteins is obviously increased, the veterinary follicle-stimulating hormone analogue can be used for replacing natural ovarian-stimulating hormone, has great commercial value and is worthy of wide-range popularization.

The invention discloses a three-step aluminum alloy hub producing method, which sequentially comprises the following steps of: cutting aluminum alloy bars into a blank, cleaning the blank to remove oil stain, heating and insulating the blank; roughly forging the blank: putting the blank into a forging die for rough forging in a press, and upsetting the blank into a spinning blank; spinning: putting the spinning blank into a spinning die on a spinning machine; and spinning the spinning blank into a rough hub; and performing precision forging: putting the rough hub into a forging die for precision forging in the press, and spinning the spinning blank into a hub. The method has the advantage of low requirement for the travel of the spinning machine on the premise that the quality of the hub is ensured and the cost is low. The invention also discloses the forging dies and the spinning dies which are used in the method.

The invention relates to a control circuit of powder feeder for hypersonic flame spraying, comprising a first potentiometer, a first speed control panel, a first voltmeter, a first power tube, a second potentiometer, a second voltmeter, a second motor, a second speed control panel, a second power tube, a first switch, a second switch, a first electromagnetic valve, a second electromagnetic valve, a transformer, a first motor and a power strip. The first motor and the second motor allows two feeding branches to be controlled; compared with the traditional single-channel feeding way, the feeding way using the two motors has the advantages that feeding efficiency is improved, the single device is used for two hypersonic flame spraying devices, the production cost is lowered, a replacement function is good, if one feeding branch has a control fault, the other feeding branch can be controlled instead, and smooth spraying is guaranteed.

The invention discloses a modified dioscorea opposita thunb starch prepolymer and a degradable polyurethane foam material prepared from the prepolymer. A preparation method of the modified dioscorea opposita thunb prepolymer comprises the following steps: (1) putting polyisocyanate and polycaprolactone, the molar ratio of which is 2: 1, into a container, reacting at the temperature of 80+ / -2 DEG C for 3-5 hours, and then degrassing under a negative pressure till bubbles do not exist, thus obtaining a polycaprolactone prepolymer; and (2) dissolving modified dioscorea opposita thunb starch and the polycaprolactone prepolymer in a dimethylsulfoxide solution at the temperature of 60-70 DEG C, then adding a catalyst NaCNBH3, reacting for 2-3 days under a stirring condition, after ending reaction, cooling obtained mixed liquid to a room temperature, then dropwise adding the mixed liquid to methyl alcohol under a stirring condition so as to form precipitates, filtering to obtain the precipitates, and drying under reduced pressure so as to obtain the modified dioscorea opposita thunb starch prepolymer.