11results about How to "Long process" patented technology

The invention provides a titanium alloy with high polishing property and a design and preparation method thereof. The design and preparation method comprises the following steps: firstly, mixing Ti-6Al-4V titanium alloy powder with a certain proportion of binder; then, the obtained feed is subjected to injection molding through an injection machine and a stretching strip mold, and a green body is obtained; and then, the green body is degreased. And finally, sintering in a vacuum sintering furnace according to a certain sintering process to obtain a final sintered part sample. The densification of the sintered sample and the regulation and control of the microstructure of the sintered sample are realized by adjusting the sintering process, so that the polishing property of the titanium alloy is improved. According to the titanium alloy with the high polishing property and the design and preparation method of the titanium alloy, different sintering processes are adopted, sintering densification of titanium alloy parts is achieved, the influence rule of the sintering processes on the microstructure of the titanium alloy is discussed, and therefore the polishing property of the titanium alloy parts is improved.

The present invention relates to a foldable structure for an easy-to-carry electric scooter comprising: an operating handle including two grips; a handle post which is attached to a lower part of the operating handle and at the bottom of which a front wheel is drivably installed; and a footrest which is connected to the bottom of the handle post at the rear of the front wheel and has a rear wheel installed at the rear end thereof, wherein the handle post has a carrying handle for hand gripping when carrying the scooter, the carrying handle being retractably built in the handle post at one side thereof; wherein the carrying handle is positioned at the front-sided width-directional center of the upper post, in order to ensure that an imaginary line connecting a support point of the front wheel in contact with the ground and a gripping point of the carrying handle passes through the center of gravity of the electric scooter, in a state of pulling out and extending the upper post from the middle post when carrying the electric scooter, and thereby the electric scooter does not rotate and remains stable even when subjected to vibrations or impacts; wherein a groove is formed in the front-sided center of the upper post into which the carrying handle is received; wherein one end of the carrying handle is hinged inside the groove such that a gripping portion of the carrying handle can be rotated and extracted; and wherein the gripping portion can be formed to include a stepped portion on one side, which is catchable to facilitate extraction.

It is an objective of the present invention to provide a substance that is safe for a living individual and allows to express of a protein with an amino acid sequence more similar to that of an original protein even from a gene causing out-of-frame in a state in which deletion of protein length is suppressed, and a composition containing the substance. The objective is achieved by a single-stranded nucleic acid molecule containing in the direction from the 5' end side to the 3' end side a first sequence complementary to a target sequence of a gene of interest and a second sequence forming a stem-loop structure; and a composition containing the single-stranded nucleic acid molecule as an active ingredient and the like.

An adhesive guiding device (10) is provided with a nozzle (11) that can be arranged opposite an adherend (H) that is an application target. A through hole (11a) formed in the nozzle (11) forms a passage for a filamentous adhesive (2). A control member such as a stopper (12) is arranged upstream of the through hole (11a) of the nozzle (11). The control member facilitates application and / or prevents slippage of the filamentous adhesive (2) better than the through hole (11a) of the nozzle (11).

The invention belongs to the technical field of crossing of building materials and phase-change energy storage materials, and particularly relates to ardealite phase-change ceramsite and a preparation method thereof.The ardealite phase-change ceramsite is prepared from, by weight, 45-50 parts of ardealite, 18-22 parts of S95 mineral powder, 7-10 parts of cement clinker, 3-5 parts of glass beads and 20-25 parts of phase-change materials. The preparation method comprises the six steps of raw material preparation, material mixing and stirring, pelletizing and forming, maintenance treatment, drying and consolidation and the like. According to the method, waste recycling application is achieved through material proportion optimization and a cold bonding process, and the method is suitable for the fields of building energy saving, environment-friendly product manufacturing and the like. The technical problems that in the prior art, when phase-change ceramsite is prepared from phosphogypsum, a phosphogypsum-based porous material needs to be prepared firstly, then a phase-change material needs to be packaged, the cylinder compressive strength is low, the water absorption rate is too high, and then the bearing capacity and the heat preservation performance are reduced are solved.

The present application relates to the technical field of backward reactions in the field of chemistry, and provides a reactant molecule prediction method and apparatus, a training method and apparatus, and an electronic device. The method comprises: extracting features of a product molecule to obtain the features of the product molecule; on the basis of the features of the product molecule, predicting a conversion path from the product molecule to a plurality of reactant molecules by using a backward reaction prediction model; and predicting synthons and completed synthons according to the conversion path to obtain the plurality of reactant molecules corresponding to the product molecule. The method provided by the present application can reduce the prediction complexity of reactant molecules, improve the generalization performance of reactant molecule prediction, and also can improve the prediction performance of the reactant molecules.

This invention belongs to the field of aluminum-based composite material preparation technology, and relates to a continuous casting and rolling method for preparing aluminum-based composite material strips. The method involves preparing a reinforcing preform with a thickness not exceeding the roll gap distance in the aluminum-based composite material strip. Before preparing the aluminum-based composite material strip, the casting rolls are water-cooled and run at a set speed. Molten aluminum is injected into the molten pool, and the liquid level is controlled to a set value. Throughout the preparation process, the molten pool liquid level is maintained at the set value. The molten aluminum cools and solidifies upon contact with the roll surface of the casting rolls. Under the casting action of the two casting rolls, an aluminum alloy strip is formed and continuously output from the lower end of the roll gap. During the preparation process, the reinforcing preform moves from top to bottom at a set speed and is immersed in the molten aluminum pool. The molten aluminum penetrates into and fills the interior of the reinforcing preform. The reinforced preform, filled with molten aluminum, gradually solidifies as it moves to the roll gap until it is completely solidified. Then, under the casting force of the two casting rolls, it undergoes rolling deformation to form the aluminum-based composite material strip.

This utility model discloses a treatment system for recovering industrial-grade sodium chromate from chromium-containing electroplating wastewater. The system is sequentially connected to a pretreatment system, an ion exchange system, an evaporation and concentration system, a purification system, and an evaporation and crystallization system. The pretreatment system removes suspended solids. The ion exchange system contains at least four ion exchange columns and an eluent tank; the coordinated operation of multiple columns ensures sufficient adsorption and elution of chromium, increasing the concentration of hexavalent chromium in the eluent, reducing the load on subsequent evaporation equipment, and shortening processing time. The evaporation and concentration system uses an MVR evaporator and integrates an online density meter. The purification system is equipped with a purification reaction vessel with a detachable pH meter probe, which can quantitatively remove sulfate, reducing the difficulty of salt separation and crystallization, increasing the number of mother liquor circulations, and thus improving the chromium recovery rate. The feed to the eluent tank allows for reasonable adjustment of the alkali dosage according to different concentrations of components, avoiding waste and reducing costs. The detachable pH meter probe facilitates maintenance, ensures accurate monitoring, and improves the stability of sulfate removal rate and the quality of sodium chromate products.

The present invention discloses a process for optimizing converter steelmaking by utilizing ironmaking gas ash, and involves three process contents: resource utilization technology of ironmaking gas ash and steel slag fine powder, and optimization of converter smelting process. The present invention utilizes ironmaking gas ash and steel slag fine powder as flux materials for converter after adding certain active materials. While utilizing ironmaking gas ash as resources, it plays the role of assisting melting slag in the early stage of converter blowing, suppressing slag splashing and metal splashing accidents in the early stage of converter smelting, and realizing the process purpose of recycling and resource utilization of solid waste within steel enterprises, with huge economic and environmental benefits.

The invention provides a rectification method for separating and purifying 1, 3-propylene glycol based on fermentation of renewable biomass, the rectification method adopts a crude distillation tower to distill a concentrated solution obtained by multi-effect evaporation, creatively uses a scraper evaporator as a reboiler of the crude distillation tower, can effectively prevent a high-viscosity salt-containing material from blocking the reboiler of the crude distillation tower, and improves the yield of 1, 3-propylene glycol. The combination of the crude distillation tower and the scraper evaporator realizes the separation and purification effects of two processes of crude distillation and rectification by using one process, simplifies the process flow, reduces the equipment investment, and reduces the energy consumption; moreover, according to the rectification method, simultaneous separation of 2, 3-butanediol and 1, 3-propylene glycol can be realized by adopting the second rectification tower, so that the process is simplified, the energy consumption is reduced, 1, 3-propylene glycol with the purity greater than or equal to 99.9 wt% can be prepared, and the quality requirement of a polymer-grade product is completely met.