116results about How to "Get cheap" patented technology

The present invention provides an upsetting method capable of unevenly expanding the diameter of a portion to be expanded in the circumferential direction of a blank. A guide body (20) having an insertion hole (21) through which the planned diameter expansion portion (2) of the holding blank (1) is inserted in a vertical bending preventing state is prepared. A protruding piece portion (22) for suppressing diameter expansion that protrudes in the axial direction of the guide body (20) is integrally provided on a part of the front end portion (20a) of the guide body (20). The predetermined diameter expansion portion (2) of the blank (1) fixed in the stationary mold (10) is inserted and held in the insertion hole (21) of the guide body (20). Next, while moving the punch (30) and pressing the portion (2) of the blank (1) to be enlarged by the punch (30) in the axial direction, the guide body (20) is directed toward the punch (30) is moved in the opposite direction of the moving direction, whereby the planned diameter expansion portion (2) of the blank (1) exposed between the front end portion (20a) of the guide body (20) and the fixed mold (10), The diameter expansion is performed in a state where the diameter expansion is suppressed for the contact portion of the planned diameter expansion portion (2) with the protruding piece portion (22).

The invention discloses a preparation method of a hollow micro-channel structure, and specifically relates to the field of micro machining. The method comprises the following steps: making a micron-sized micro-channel master mask by a photoetching technology and a hot reflux technology; making a PDMS (Polydimethylsiloxane) flexible template by using the master mask, wherein the obtained flexible substrate has a pattern structure complementary to the micro-channel master mask; tightly attaching the PDMS flexible template to the surface of a chip to form a micro-channel cavity; dripping S1813 photoresist on one side; filling the micro-channel cavity with the photoresist under the action of capillary force; heating after filling for a long time, wherein the photoresist in the micro-channel cavity reflows, so that the photoresist in contact with an inner wall of the micro-channel cavity is attached to the inner wall; cooling, curing and removing the PDMS flexible template to obtain the hollow micro-channel structure on the surface of the chip. Compared with other methods for preparing a hollow micro-channel, the preparation method disclosed by the invention has the advantages of low cost, simple process and the like. The preparation method is suitable for the application fields of micro machining, micro-fluidic chips, biomedicine and the like.

The present invention relates to an improved process for preparing L-phenylephrine hydrochloride 3 on an industrial scale by asymmetric hydrogenation as the key step and a special sequence of subsequent steps, using [Rh(COD)Cl]2 as catalyst and a chiral, two-pronged phosphine ligand such as (2R,4R)-4-(dicyclohexylphosphino)-2-(diphenylphosphino-methyl)-N-methyl-aminocarbonyl-pyrrolidine as the catalyst system.

The invention provides a motion planning and cooperative positioning method and device for an unmanned vehicle network formation. The method includes the steps that in one planning cycle, according tothe acquired initial pose, target pose and kinematic parameters of each vehicle in the unmanned vehicle network formation, a path plan is generated, wherein the unmanned vehicle network formation includes a piloting vehicle and several following vehicles; the path plan is sent to each following vehicle so that each following vehicle can complete the corresponding target pose according to the pathplan. According to the motion planning and cooperative positioning method and device for the unmanned vehicle network formation, the piloting vehicle and the following vehicles are set by adopting alayered system structure; in the path planning part, various constraint conditions are considered, and a Dubins shortest path planning way is adopted; in the cooperative positioning part, through extended Kalman filtering, information fusion is performed by using UWB ranging, inertial navigation, a gyroscope and other means facilitating collection, the uncertainty of pose estimation is eliminated,and the positioning efficiency is improved.

A method for operating a blast furnace and a corresponding blast furnace, the method including recovering top gas from the blast furnace, submitting at least a portion of the top gas to a recycling process, and feeding the recycled top gas back into the blast furnace, where the recycling process includes feeding the recovered top gas to a reformer unit, feeding volatile carbon containing material to the reformer unit, proceeding to flash gasification of the volatile carbon containing material in the reformer unit, at a temperature between 1100 and 1300° C., and thereby producing devolatised carbonaceous material and synthesis, and allowing the devolatised carbonaceous material and synthesis gas to react with the recovered top gas.

A device for the non-contacting measurement of an object to be measured, particularly for distance and/or vibration measurement, has at least one laser light source, optical devices for splitting the light into object light (4) and reference light (5) for interacting with the object to be measured and for superimposing object light and reference light following the interaction of the object light with the object to be measured, preferably a frequency shift device in the form of a Bragg cell for producing a frequency shift between the object light and the reference light and a detecting device (15) for converting reference light and object light into electrical signals suitable for further processing. The detecting device has at least two series-connected optoelectronic transducers in the form of photodiodes (30, 31). Between the transducers is located a tap (32) for tapping a difference signal which, for further processing, is supplied to a transimpedance circuit (33) associated with one of the transducers. Thus, there is a subtraction of photodiode currents prior to processing in an amplifier circuit in a balanced detection arrangement. This inexpensively permits measurements at high reference light power with resolutions in the quantum noise limit range.

The present invention relates to a sealing arrangement for attaching a side plate often used with a pump volute of a centrifugal pump and an attachment screw used therewith. A characterizing feature of the sealing arrangement for attaching the side plate of a centrifugal pump, comprising at least a pump volute (10) and a side plate (130) with attachment screws (132) and flanges (164) of the screws (132) arranged in communication with the volute (10) or the cover of the casing, is that an annular seal (180) is arranged between the screw (132) and the volute or the cover of the casing.

The disclosed information describes a preheating method and apparatus for preheating raw tire including metal members embedded therein prior to vulcanization molding process, to heat whole part of the raw tire up to desirable temperature rapidly and certainly to complete vulcanization molding in a short time. The disclosed apparatus comprises a retaining means for retaining raw tire in a predetermined attitude in a releasable manner; a induction heating means for heating the metal members inductively by means of a high frequency magnetic field, the high frequency magnetic field being applied to raw tire retained by the retaining means; and a radiation heater for heating a rate-limiting portion radiatively, the temperature of the rate-limiting portion rising slowly under only induction heating for the metal members.

The invention discloses a wind turbine generator wind wheel imbalance identification method, comprising the steps of: S01, acquiring active power and front, back, left and right vibration variables ofa wind turbine generator, acquiring average values of effective values of the vibration variables in a preset time period, and presetting standard threshold values of the vibration variables under the corresponding active power; S02, performing data switching on the vibration variables under rated power, performing FFT analysis on the data, and extracting a median, an upper quantile and a lower quantile; S03, and judging that a wind wheel is pneumatically unbalanced when the following two conditions are met at the same time, namely, (1) the average values of the effective values of the front,back, left and right vibration variables of the wind turbine generator are greater than the standard threshold values under the corresponding power, and (2) the median is higher than a first preset standard value or the upper quantile is higher than three times of the lower quantile. The invention further correspondingly discloses an identification system corresponding to the identification method, and a storage medium. The wind turbine generator wind wheel imbalance identification method, the wind turbine generator wind wheel imbalance identification system and the storage medium have the advantages of easy and convenient operation, low cost, high precision, good timeliness and the like.

A upsetting method and an upsetting device capable of efficiently increasing the diameter of a bar-like material at at least two positions. In the method, a plurality of guides (31) and (32) having insertion holes (34) are prepared, and the bar-like material (1) fixed to a fixed die (20) is inserted into the insertion holes (34) of the plurality of guides (31) and (32) in order and held therein. Next, while the material (1) is axially pressed by a punch (50R), the plurality of guides (31) and (32) are integrally moved in a direction opposite to the moving direction of the punch (50R) in a mutually fitted state to increase the diameter of the first exposed part (4) of the material (1) exposed between the first guide (31) disposed on the forefront among the plurality of guides (31) and (32) and the fixed die (20). After the first guide (31) is moved, the second guide (32) disposed on the rear side of the first guide (31) among the plurality of guides (31) and (32) is moved in the direction opposite to the moving direction of the punch (50R) to increase the diameter of the second exposed part of the material (1) exposed between the both guides (31) and (32).

The invention relates to an illumination device (100). The illumination device comprises a lamp tube (1) with two open ends, a light engine (2) arranged in the lamp tube (1), a carrier for carrying the light engine (2), and two end covers (3) for sealing the open ends. The illumination device (100) is characterized by further comprising a diffuser (4), wherein the carrier for carrying the light engine (2) is kept on the diffuser (4), and the diffuser (4) is kept on the inner wall of the lamp tube (1).

The invention discloses a co-expression system and construction method of polyvalent bacteriophage lyase genes, a live vaccine of a carrying system and preparation and application of the live vaccine. Eukaryotic expression plasmids are used as an expression vector, and LysinA, LysinB and Holin gene segments are directionally inserted into the plasmids to simultaneously express the co-expression system of the bacteriophage lyase genes of three kinds of targeted mycobacterium tuberculosis. Mycobacterium smegmatis with good targeting property of macrophages or genetically-modified recombinant BCG is used as a live vector, the co-expression system simultaneously carrying three kinds of genes is electrically transformed into the mycobacterium smegmatis or the genetically-modified recombinant BCG, and then the recombinant therapeutic tuberculosis live vaccine is obtained through expansion in vitro. The live vaccine has a good effect on the field of curing active tuberculosis or latent tuberculosis infection caused by proliferative mycobacterium tuberculosis, dormant mycobacterium tuberculosis and drug-resistant mycobacterium tuberculosis.

The present invention provides a method for producing an epoxy compound, comprising oxidizing a carbon-carbon double bond of an organic compound by hydrogen peroxide in the presence of a neutral inorganic salt and a mixed catalyst of a tungsten compound (a), at least one phosphorus compound selected from the group consisting of phosphoric acids, phosphonic acids, and salts thereof (b) and a surfactant (c), and an epoxidizing method comprising oxidizing a carbon-carbon double bond by hydrogen peroxide in the presence of the catalyst and the neutral inorganic salt.

The invention discloses a graphene composite nano-Fe3O4 radar wave absorption material and a preparation method thereof. The preparation method includes the following steps that divalent iron salt andtrivalent iron salt are dissolved in water and stirred to obtain an iron salt solution; a reduction-oxidation graphene solution is dispersed into an organic alcohol solvent and stirred to obtain dispersion liquid; the iron salt solution and the dispersion liquid are mixed, and a precipitating agent is added to obtain a mixed solution; the mixed solution is transferred to a reaction kettle for heating to obtain reaction products; the obtained reaction products are separated, washed and dried to obtain graphene composite nanometer Fe3O4; the graphene composite nanometer Fe3O4 is ground and fills the matrix to obtain the graphene composite nano-Fe3O4 radar wave absorption material. According to the technical scheme, the wave absorbing performance of the radar wave absorbing material can be effectively improved.

The invention relates to a method for producing tetrahydropyran derivatives, to said tetrahydropyran derivatives and to the use of said tetrahydropyran derivative for producing other tetrahydropyran derivatives. The invention in particular relates to producing halogenated tetrahydropyran derivatives.

The invention provides a high-slump-retaining mud-resistant polycarboxylate superplasticizer mother liquor as well as a preparation method and application thereof, and the high-slump-retaining mud-resistant polycarboxylate superplasticizer mother liquor is prepared from the following materials in percentage by mass: 25-36% of ether macromonomer, 0.15%-0.3% of an oxidizing agent, 2.2-3.0% of unsaturated carboxylic acid, 1-5% of an anti-mud monomer, 0.3-3% of an amide monomer, 0.01 to 2 percent of a chain transfer agent, 0.03%-0.06% of a reducing agent, 1.0%-1.1% of a pH regulator, and remainingamount of deionized water. The high-slump-retaining mud-resistant polycarboxylate superplasticizer mother liquor with low mixing amount, long slump-retaining time and strong mud resistance is prepared from the raw materials through a synthesis process.

The invention discloses a halogen coumarins derivative. The derivative is characterized by having a structural formula as follows. The name of the derivative is 4-methyl-7-[6-bromohexyloxy] coumarin. Meanwhile, the invention also discloses a preparation method of the halogen coumarins derivative, specific application of the derivative, and a preparation method of harpacticoida insecticide which contains the derivative serving as a main effective component.

The issue is to provide a method to obtain optically active vinyl-cyclopropane carboxylic acid derivatives with high yield and high optical purity using starting materials that are safe and easily acquired at a low cost. An additional issue is to provide a method to obtain vinyl-cyclopropane amino acids with high optical purity inexpensively and safely. The issues are resolved by obtaining optically active vinyl-cyclopropane carboxylic acid derivatives with a method comprising a process to allow an optically active amine to act on a racemic vinyl-cyclopropane carboxylic acid derivative and produce an optically active vinyl-cyclopropane carboxylic acid derivative-amine diastereomer salt. Vinyl-cyclopropane amino acids can also be obtained by deriving a vinyl-cyclopropane amino acid from the optically active vinyl-cyclopropane carboxylic acid derivative-amine diastereomer salt obtained in this way.