67results about How to "Save money on experiments" patented technology

The invention discloses a submerging jet flow testing box and a testing method. The testing box includes a box body, jet flow water inlets, a vision window, a pressure gauge interface, a relief port, a clamp holder, a feeding device interface, a liquid stream valve port, a drainage port and the like. During the laboratory experiment process, a submerging fluid field environment is improved, and the approximate engineering practical submerging jet flow is simulated; other testing instrument is combined, the submerging jet flow fluid field structure is observed; the potential core of jet under the submerging condition is observed combined with a three dimensional laser particle imaging velocimeter (3DPIV) system; the variation of different jet nozzle jet flow fluid field structures is analyzed, and the internal structures of the jet nozzles are optimized; the accelerating mechanism and distribution condition of grinding material particles during the submerging grinding material jet flow testing are analyzed; and meanwhile, the observation experiment for cutting and flushing material under the submerging condition can be performed. The submerging jet flow testing box and the testing method have the advantages that the structure is simple, the operation is convenient, nozzles can be replaced easily, a plurality of testing functions are provided, and compared with other jet flow testing devices, the submerging jet flow testing box not only can test the jet flow fluid field structure under the submerging condition, but also can be reutilized repeatedly, thereby saving the experimental expense at the same time.

The present invention discloses a modeling method for an abnormal aging fault of a photovoltaic component. The modeling method comprises the following steps: firstly constructing a photovoltaic component model according to a 5-parameter mathematical physics model of a solar cell; establishing a photovoltaic string model based on an M file in the MATLAB according to the photovoltaic component model, simulating the specific influence of the abnormal aging component on the string, and drawing an I-V characteristic curve; and according to the photovoltaic string, constructing a photovoltaic array simulation model to simulate the influence of the abnormal aging component on the entire column. Beneficial effects of the method disclosed by the present invention are that the influence of the abnormal aging component on the entire photovoltaic string and the photovoltaic array can be studied by establishing a photovoltaic array simulation model, particularly a photovoltaic array model with an abnormal aging component, and more intuitive understanding can be brought about, so that convenience is brought to guide the practical experiments, and necessary help is provided to the fault diagnosis method by using the photovoltaic array characteristic curve.

The invention provides an o-antigen-specific nucleic acid against bacillus coli of Shigella boydii 14. It is nucleotide total sequence of gene cluster controlling o-antigen synthetic, possesses several inserted, lost and substituted basic group and also comprises oligonucleotide. Oligonucleotide of the invention has high specificity against o-antigen of bacillary dysentery of B14-style. The invention also discloses method to detect and attest bacillary dysentery of B14-style using oligonucleotide.

The invention provides a nucleotide specific for escherichia coli 0134 O-antigen, which is the total nucleotide sequence of the gene cluster for controlling the synthesis of O-antigens in Escherichia, e.g. isolated nucleotide represented by SEQ ID No:1 with overall length of 7530 bases, or nucleotide of SEQ ID No:1 including one or more inserted, deleted or substituted bases, and sustaining the functions of the isolated nucleotides SEQ ID No:1, it also includes the oligosaccharide unit treatment genes in the O-antigen gene cluster originated from Escherichia coli 0134. The invention proves the high specifity of oligonucleotides for Escherichia coli 0134 O-antigen through PCR, a method for detecting and identifying Escherichia 0134 by means of the oligonucleotide according to The invention discloses also disclosed.

The invention discloses a 1% osmium tetroxide fixative and a preparation method thereof. The following materials are adopted in the method which comprises the following steps of: (1) preparing a phosphate buffer solution from a disodium hydrogen phosphate solution and a sodium dihydrogen phosphate solution, and carrying out intermediate product inspection after the preparation, wherein the preparation process can be checked by two persons; (2) adding the phosphate buffer solution prepared in the step (1) to osmium tetroxide and distilled water, then purifying and carrying out pH value inspection; and (3) carrying out fused subpackaging on the solution prepared in the step (2) with brown ampoules, carrying out final examination after packaging, and then delivering out of warehouse. The invention has the advantages of high quality, experiment time saving, experiment cost saving, long quality guarantee period and the like, reduces the pollution of outdated reagent to the environment and prevents reagent preparation from doing harm to the health of experimenters.

The invention discloses a universal experiment device of a power electronic circuit. The universal experiment device comprises an open loop controller, wherein a human-computer interaction module anda driving module are arranged in the open loop controller; the human-computer interaction module is connected with the driving module; the driving module is provided with four output connectors; eachoutput connector is connected with a BNC connector of a half-bridge mother board and a BNC connector of an H-bridge mother board; a half-bridge daughter board is inserted and connected onto the half-bridge mother board and the H-bridge mother board; and a proper number of capacitors and inductors are connected for respectively building half-bridge circuit topology, whole-bridge circuit topology and DAB circuit topology. The invention also discloses an experiment method of the experiment device. The experiment method is used for building the half-bridge circuit topology, the whole-bridge circuit topology and the DAB circuit topology. The device disclosed by the invention solves the problem of great device consumption, time waste and labor waste caused by the need of repeated circuit building in the existing circuit experiment; the utilization rate of the mother board is effectively improved; and the use of the whole device is convenient.