185results about How to "Guaranteed withdrawal" patented technology

The invention provides a vanadium extraction dephosphorization process from vanadium melted iron and a steel-smelting technology which uses the process. The vanadium extraction dephosphorization process from vanadium melted iron comprises adding vanadium extraction dephosphorization agent and cooling agent in melted iron in the process of oxygen supply blowing for vanadium melted iron, and obtaining vanadium slag and low phosphorus semi-steel. The process can extract vanadium at the same time of dephosphorization, thereby not only guaranteeing the effective extraction of vanadium, but also effectively removing phosphorus in melted iron.

The invention provides a method for extracting effective constituents from maca. The method includes the following steps that fresh or dry maca roots are taken as raw materials, the maca roots are washed, impurities are removed, an ethyl alcohol-water solution is used as homogenate liquid, the maca roots are homogenized, crushed and extracted, so that a homogenate extracting solution is obtained, filtering is conducted, filtering residues are mixed with an extraction solvent, negative pressure cavitation solid-liquid mixing cyclone extraction is conducted to obtain the extracting solution, the extraction solutions are combined and concentrated, a concentrated solution and a low-level solvent are mixed, then negative pressure cavitation liquid-liquid extraction is conducted, an extracting liquor is obtained, an extract is obtained after concentration, ethyl alcohol is added for redissolving, and thus a solution 1 is obtained; the extracted maca filtering residues are extracted again through hot water, an extracting solution is obtained after filtering, and a solution 2 is obtained after concentration; the solution 1 and the solution 2 are combined and dried, and extractives of the effective constituents of the maca are obtained. The method for extracting the effective constituents from the maca has the advantages that the technological process is simple, the production cycle is short, the effective constituents can be efficiently extracted, products can maintain the original flavor of the maca, used equipment is conventional equipment, production cost is low, and industrial production is easy to achieve.

The invention relates to a PCR reaction device. The device comprises a PCR reaction main body, a display module and a power supply device, the PCR reaction main body comprises a nucleic acid extraction device, a nucleic acid purification device, an amplification reaction device and a shell, and the nucleic acid extraction device is used for cracking a sample to obtain a mixture; the nucleic acid purification device is used for independently separating nucleic acid from the mixture; the nucleic acid amplification reaction device is used for amplifying nucleic acid at a specified temperature by utilizing a temperature control unit, and the nucleic acid extraction device, the nucleic acid purification device and the nucleic acid amplification reaction device are all arranged in the shell; the display module is arranged at the end part of the PCR reaction main body and is used for displaying the working states of the nucleic acid extraction device, the nucleic acid purification device and the amplification reaction device; the power supply device is used for supplying power to the PCR reaction main body and the display module, and the power supply device is arranged on the right side of the PCR reaction main body. Therefore, the integration level of experimental equipment is high, the continuity of an experiment is high, and extraction, purification and amplification can be realized on one pipeline layer.

A bioreactor assembly of the present invention for holding a media and supporting growth of a plurality of plants. The assembly includes a light source and a container having a light transmissive wall structure and defining a reservoir. A major axis of the reservoir is substantially horizontal allowing the reservoir to be filled with media to a partial level and to define a relatively large surface area for support of the plants. The assembly may also include clamps to secure and seal separate wall structure portions of the container together, and end caps to the wall portions, to define an aseptic environment. As another option, the clamps may define openings therethrough that allow passage of various devices for measuring and controlling bioreactor function such as a gas supply nozzle, a gas exit nozzle, an air temperature probe, a pH probe, a sampling drain, a gas composition probe and a media temperature probe.

The invention relates to a layered point cloud segmentation method based on DBSCAN. Firstly, a CSF is adopted to separate a ground point from a non-ground point; In a non-ground point segmentation process, point clouds in the vertical direction are layered according to a certain height, DBSCAN clustering is carried out on projection points of each layer on an XOY plane to obtain a central point ofeach cluster, all the clustered central points are projected to the XOY plane, and each object main body is clustered by utilizing DBSCAN to obtain a plurality of object main bodies; a judgment is made whether each main body point exists in each layer of each main body or not, judging the number of objects contained in each cluster, and finally, a cluster of multiple objects is segmented. For segmentation of side viewpoint cloud data, extraction of most of main bodies in a scene can be guaranteed, certain robustness is achieved, particularly, the invention has good performance in the scene with trees as the main component, and the result obtained through the method has certain significance in point cloud classification and point cloud three-dimensional reconstruction after point cloud segmentation.

A heat exchanger with a receiver tank is provided with a multi-flow type heat-exchange body (10), a receiver tank (3), a block flange (4) having a side surface connected to the periphery of a condensing portion outlet of the heat exchanger body (10) and an upper end to which a lower end of the receiver tank (3) is attached and a bracket (6) for supporting the upper part of the receiver tank (3) to the heat exchanger body (10). A flange-shaped pressing stepped portion (31a) is formed on the upper periphery of the tank main body (31) of the receiver tank (3). The bracket (6) is provided with a joint portion (61b) to be secured to the peripheral surface of one of headers (11) and embracing portions (61a) and (62a) that surround the periphery of the tank main body (31) and are engaged with the upper side of the pressing stepped portion (31a) to downwardly press the receiver tank (3). With this heat exchanger, stable refrigeration performance can be obtained and that the assembling operation can be performed easily.

The invention discloses a construction method for pipe retreating of a cross-river pipe jacking pipeline in a soft soil stratum. The method comprises the following steps that firstly, original equipment devices in a pipe retreating pipeline are dismounted and removed, a steel seal door, a reverse jacking hydraulic cylinder, a counter pull steel beam, a steel strand set and other pipe retreating equipment devices are installed, safety measures of the steel seal door, the reverse jacking hydraulic cylinder, the counter pull steel beam, the steel strand set and other pipe retreating equipment devices are checked, and pipe retreating construction is conducted after debugging. In the method, measures of arrangement of a dewatering well and a packing water stop ring are adopted for solving the problem of water stop, and for solving the problem of collapse risks existing after pipe retreating, the manner that pipe retreating and soil filling are conducted at the same time is adopted; and meanwhile, in the later stage of pipe retreating, injected soil slurry is switched into cement slurry, and a hole is strengthened. According to the disclosed technical scheme, the collapse problem is effectively solved, and meanwhile long-distance pipe retreating is achieved.

A Chinese medicine for treating endometritis, adnexitis, pelvic inflammation, etc is prepared from 10 Chinese-medicinal materials including prunella spike, green chiretta, corydalis tuber, Chinese angelica root, etc. Its preparing process is also disclosed.

The invention discloses a numerical control machine tool spindle fault diagnosis method and system. The method comprises the steps of acquiring different state signals of a numerical control machine tool spindle; conducting window interception analysis on the state signals and extracting a fractal dimension of signal features to obtain feature values of the states of the numerical control machinetool spindle; establishing a fault diagnosis model by using the state features subjected to preprocessing and feature extraction as a training sample set of a BP neural network; conducting fault diagnosis on the numerical control machine tool spindle according to the fault diagnosis model. The system comprises a sensor, a preprocessing and feature extraction unit, a fault diagnosis model establishment unit and a fault diagnosis unit. Through the numerical control machine tool spindle fault diagnosis method and system, intelligent fault diagnosis on the numerical control machine tool spindle isachieved, so that the fault rate of the machine tool spindle is reduced, and economic benefits are increased.