47results about How to "With sensitivity" patented technology

The invention discloses a method for obtaining fluorescence emission spectrum information of a single polymer molecule in a shearing field. The method comprises the following steps: (1) preparation of a polymer solution whose concentration is less than 10nM, and a fluorescence molecule probe is labelled on the polymer molecule; (2) the shearing field is applied, the labelled polymer solution is irradiated by laser, an emitted fluorescence signal is collected and analyzed, and fluorescence emission spectrum information of the single polymer molecule is obtained; and a measuring system comprises an excitation light source unit, a shearing application and rheological measurement unit, an optical microscopy unit, and a single molecule fluorescence emission spectrum measurement unit, wherein, the bottom part of the shearing application and rheological measurement unit is provided with an excitation light optical window. Macroscopic shearing application, rheological measurement and single molecule fluorescence emission spectrum measurement are combined, and the single molecule fluorescence emission spectrum of the system to be measured in the shearing field is obtained, wherein detection space is at 10<-15>L level, and sensitivity of single molecule level is provided.

The invention discloses a method for obtaining microscopic motion information under a shear field by using the trajectory light intensity distribution of fluorescence wide-field imaging. The method is a measurement and analysis method for obtaining motion information at the single-molecule scale through the light intensity distribution of the fluorescent particle motion track. The method uses the polymer microrheological spectrometer independently developed by the research group, and combines macroscopic shear application and rheological measurement technology with microscopic fluorescence wide-field microscopic imaging technology. This method has single-molecule level sensitivity and resolution rate; and can analyze the light intensity distribution characteristics through software, and successfully obtain the particle motion information and its change with the external shear field from the microscopic level. This method will also be widely used in the field of basic research on polymer physics under complex flow fields, and to obtain microscopic physical images and motion information.

The invention discloses a relay protection checking vehicle. The vehicle comprises a cab and a carriage arranged on the rear part of the cab, and is provided with instrument equipment required by on-site relay protection detection, wherein doors are arranged on the left side, the right side and the rear side of the carriage; a plurality of frames are arranged in the carriage; the instrument equipment is arranged on the frames; the wiring terminals of the instrument equipment are arranged on the frames in a mode that the wiring terminals face the outside of the vehicle; a control table for performing control operation on the instrument equipment is arranged in the carriage; a group of incoming line sleeves and a plurality of groups of outgoing line sleeves are arranged on the outer wall ofa power distribution room in a transformer substation; a test circuit is electrically connected between the incoming line sleeves and a bus of the power distribution room; a plurality of test points are connected in parallel between the outgoing line sleeves and the bus of the power distribution room; and a plurality of groups of current transformers are checked at a primary current wiring position. One checking vehicle can meet relay protection checking requirements on selectivity, quickness, sensitivity and reliability through a reasonable structural design and complete equipment configuration.

The invention relates to a sequence current grey correlation and multi-information fusion-based wide-area backup protection method. The method comprises the steps that electric power system transientinformation is mined by means of the gray correlation degree, and combined with state information, multiple pieces of information is fused to conduct grid fault line determination, transient electrical quantities are combined, compared with a pure simple information fusion technology, better fault freedom is achieved, and by means of the electrical quantities, information errors or deletion causedby reasons such as transmission channel faults and sampling can be effectively overcome; a sequence current grey correlation method is introduced, protection still has good motion performance under the complex work conditions such as high resistance grounding and open-phase operation, and certain sensitivity is achieved. Accordingly, the reliability and high fault tolerance are both considered, and meanwhile data sources do not need to be put into an electric power system synchronous phasor measurement device, a person only needs to utilize an existing device of a transformer substation, andthe economical efficiency is better achieved. According to the method, the high fault freedom is achieved, and the certain adaptive capacity and the good motion performance are achieved under the complex work conditions.

The invention relates to a primer and a probe capable of quickly detecting the amplification of incising incision enzyme nucleic acid of salmonella at a constant temperature. A positive primer sequence is SEQ ID NO:1; negative primer sequence is SEQ ID NO:2; a sequence of a P1 probe is SEQ ID NO:3; and the sequence of a P2 probe is SEQ ID NO:4. The invention also provides a kit and an applicationmethod of the same. The kit contains the sequences of the primer and the probe and is used for quickly detecting the salmonella through the amplification at the constant temperature. The primer and the probe of the kit are designed according to conservative gene sequences of bacterial strains to be detected, so that specificity of a detecting method is ensured. Moreover, the detecting method has a sensitivity similar to a PCR (Polymerase Chain Reaction) detecting method, and only an ordinary water bath kettle is needed, instead of an expensive PCR instrument. Results can be detected by a universal quick assay board which can be used for quickly detecting amplimers of nucleic acid, instead of being observed by adopting a gel electrophoresis method. The kit has the advantages of simple structure, quickness, safety and no pollution, and is particularly applicable to a food inspection organization.