62results about How to "Improve analysis results" patented technology

This invention provides methods and systems for injection of analytes into a separation channel for resolution and detection. Samples can be preconditioned and concentrated by isotachophoresis (ITP) before the injection is triggered by a detected voltage event. Separation of analytes from other sample constituents can be enhanced using skewing channel ITP.

The invention discloses an operating method of a resistive current on-line monitoring system of a metal oxide arrester (MOA). Fundamental wave parameters of a resistive leakage current of the MOA are usually obtained according to a projection method. The method comprises the following steps of: sampling an electric network voltage and an MOA leakage current signal at the same time; acquiring a fundamental wave amplitude value and an initial phase angle of the electric network voltage by using a quasi-synchronization discrete Fourier transformation (DFT) harmonic analysis technology of a variable fence; acquiring the fundamental wave amplitude value and the initial phase angle of the MOA leakage current by using the quasi-synchronization DFT harmonic analysis technology of the variable fence; acquiring a projection angle of a fundamental wave of the leakage current on the fundamental wave of the electric network voltage according to the projection method; and acquiring the fundamental wave of the resistive leakage current of the MOA, and outputting and displaying the fundamental wave. By adoption of the operating method of the resistive current on-line monitoring system of the MOA, the analysis error of the quasi-synchronization DFT harmonic analysis technology is effectively avoided, and a high-accuracy harmonic analysis result is obtained, so that the reliability in test of the resistive current of the MOA based on a harmonic analysis theory is improved.

The invention discloses a working method of an improved high precision medium loss current tester based on quasi-synchronization DFT. The method comprises the following steps: simultaneously sampling a voltage signal V and a current signal I which are applied on a tested piece; applying variable fence quasi-synchronization DFT harmonic wave analysis technology to obtain a fundamental wave phase angle of applied voltage; applying the variable fence quasi-synchronization DFT harmonic wave analysis technology to obtain a fundamental wave initial phase angle of the current signal; calculating dielectric loss tangent according to a formula. According to the working method, an analysis error of the quasi-synchronization DFT harmonic wave analysis technology is effectively improved, a harmonic wave analysis result with high precision is obtained, and reliability of a medium loss current test is raised.

The invention discloses a harmonic wave analysis method for an electric energy quality harmonic wave analyzer. The harmonic wave analysis method is improved and implemented on the basis of quasi-synchronous discrete Fourier transformation (DFT) and comprises the following steps of: sampling an electric signal X which is needed to be subjected to harmonic wave analysis in a power grid, and sampling (W+2) pieces of sampling point data at equal intervals; in the process of performing harmonic wave analysis by applying quasi-synchronous DFT, changing a frequency domain sampling position according to the drift mu of a signal frequency, wherein the frequency domain sampling position is mu2pi / N; and calculating the amplitude and the initial phase angle of each harmonic wave of the electric signal X, respectively calculating the amplitude percentages and the phase angle differences of amplitudes Pk and fundamental waves P1 of higher harmonic waves of a voltage signal V and a current signal I, outputting and displaying.

This invention provides methods and systems for injection of analytes into a separation channel for resolution and detection. Samples can be preconditioned and concentrated by isotachophoresis (ITP) before the injection is triggered by a detected voltage event. Separation of analytes from other sample constituents can be enhanced using skewing channel ITP.

The invention relates to a pulse condition analysis method based on photo plethyamo graphy (PPG) signals and image enhancing. The method includes the following steps of collecting a human face video image, conducting enhancing treatment on the video image to eliminate the influences of low illumination, separating RGB channels of a video, conducting treatment through an ICA algorithm, analyzing the relevance of G channels to obtain PPG pulse wave signals, denoising the noise-containing PPG pulse wave signals, obtaining all feature points of the PPG pulse wave signals, inputting feature valuesof pulse waves into a KNN algorithm to output a pulse condition classification result, comparing the classification result with a standard database, and judging symptoms. By means of the method, a traditional Chinese medicine pulse condition theory and a computer technology are combined, so the objective and quantitative pulse condition analysis can be effectively realized, and the influences of the low-illumination environment on pulse condition analysis during collecting are avoided.

The invention discloses a working method of MOA (Metal Oxide Arrester) resistive current tester; the resistive leakage current fundamental wave parameters are acquired normally by a projection method, comprising the following steps of: sampling leakage current signals of power grid voltage and MOA at the same time; acquiring the fundamental wave amplitude value V1=(a<2>k+b<2>k)<1 / 2> and an initial phase angle psi v1=tg<-1>(ak / bk) of the power grid voltage by a changeable fence plesiochronous DFT (Discrete Fourier Transformation) harmonic wave analyzing technology; acquiring the fundamental wave amplitude value I1=(a<2>k+b<2>k)<1 / 2> and initial phase angle psi I1=tg<-1>(ak / bk) of the MOA leakage current by the changeable fence plesiochronous DFT harmonic wave analyzing technology; acquiring the projection angle psi=psi I1-psi v1 of the leakage current fundamental wave on the power grid voltage fundamental wave based on the projection method; acquiring the MOA resistive leakage current fundamental wave I=I1*cos(pis) and outputting and displaying the fundamental wave. The analyzing error of the plesiochronous DFT harmonic wave analyzing technology is effectively reduced and high-precision harmonic wave analyzing result is acquired by the working method of MOA resistive current tester provided by the invention. Consequently, the reliability of MOA resistive current test based on harmonic wave analyzing theory is improved.

The present invention discloses a multifunctional atraumatic pulmonary ventilation and blood flow volume determination apparatus. Said apparatus is equipped with AC constant current source generation device which can convert the constant voltage into constant current and can be connected with an electronic data acquisition device by means of a drive circuit whose output impedance is greater than 30K ohms. The described electronic data acquisition device includes at least six electronic switches and specific arrangement mode of the described electronic switches. Said invention has the advantages of accurate and reliable acquired data, simple determination method and accurate and quick analytical result. Besides, said invention also provides its concrete application range.

The invention discloses a harmonic analysis method of a power quality harmonic analyzer. The harmonic analysis method of the power quality harmonic analyzer is realized through improvement based on a quasi-synchronous DFT. The harmonic analysis method of the power quality harmonic analyzer comprises the steps that an electrical signal X on which harmonic analysis needs to be conducted is sampled in a power grid, and data of W+2 sampling points are sampled at equal intervals; the position for frequency domain sampling is changed according to the drifting Mu a signal frequency, when the harmonic analysis is conducted by means of the quasi-synchronous DFT, namely the position for the frequency domain sampling is Mu2pi / N. According to the harmonic analysis method of the power quality harmonic analyzer, after the amplitude and the initial phase angle of each harmonic wave of the electric signal X are calculated, the percentage and the phase angle difference between the amplitude value Pk of a higher harmonic and the amplitude value of a fundamental harmonic P1 of a voltage signal V and the percentage and the phase angle difference between the amplitude value Pk of a higher harmonic and the amplitude value of a fundamental harmonic P1 of a current signal I are calculated respectively, output and displayed.

The disclosed invention relates subscription based electronic book reading platform for mobile devices. In embodiments, the reading platform may provide recommendations of electronic books to users based on a user's behavior. In embodiments, the reading platform may provide for methods which determine lifetime value of books and payment to content providers within a subscription based electronic book service model. The reading platform may also restrict user access depending on user location or connection.

The invention discloses a harmonic analysis method of a power quality harmonic analyzer, wherein the harmonic analysis method is achieved based on the improvement on the quasi-synchronization DFT. The harmonic analysis method comprises the steps that an electrical signal X on which the harmonic analysis needs to be carried out is sampled in a power grid, and data of W+2 sampling points are sampled at equal intervals; when the harmonic analysis is carried out according to the quasi-synchronization DFT, the position of frequency domain sampling is changed according to the drifting value, seen in the specification, of the signal frequency and then the frequency domain sampling position confirms to the value in the specification; the amplitude, seen in the specification, of all harmonics of the electrical signal X and the initial phase angles, seen in the specification, of the harmonics of the electrical signals X are worked out; the amplitude percentage, seen in the specification, of the amplitude Pk of the higher harmonics of the voltage signal V and the current signal I to the amplitude of the fundamental harmonic P1 is worked out, and the phase angle difference seen in the specification is worked out, and the amplitude percentage and the phase angle difference are output and displayed.

The embodiments of the invention provide an acceleration device and method for gene similarity analysis and computer equipment. The acceleration device comprises: a high-speed communication interfacewhich is used for communicating with a host and receiving a to-be-accelerated task distributed by the host; a sequence caching module which is used for caching one or more tasks from a host, wherein each task comprises a plurality of gene sequence data to be subjected to gene similarity analysis; an array processor, which is provided with a processing unit for processing tasks, wherein the processing unit is internally provided with a complete assembly line for processing the tasks based on a data-driven streaming computing mode, and the assembly line is internally provided with a plurality offixed-point computing components required for processing the tasks; a control module, which is configured to be used for distributing the to-be-processed tasks in the sequence caching module to the processing unit; and a task caching module, which is provided with a task caching unit and is used for caching the to-be-processed tasks allocated to the processing unit. With the acceleration device and method in the invention, gene similarity analysis efficiency can be improved, and analysis results can be quickly obtained.

The invention discloses an operating method of an MOA resistive current online monitoring system whose resistive leakage current fundamental wave parameter is usually obtained according to a projection method. A concrete process is that: a power grid voltage and an MOA leakage current signal are sampled simultaneously; a variable fence quasi-synchronous DFT harmonic wave analysis technology is applied to acquire a fundamental wave amplitude value and an initial phase angle of the power grid voltage; the variable fence quasi-synchronous DFT harmonic wave analysis technology is applied to acquire the fundamental wave amplitude value and the initial phase angle of the MOA leakage current; a projection angle of the leakage current fundamental wave on the power grid voltage fundamental wave is acquired according to the projection method; and the MOA resistive leakage current fundamental wave is acquired and outputted to display. According to the operating method of the MOA resistive current online monitoring system, analysis errors of the quasi-synchronous DFT harmonic wave analysis technology are effectively improved so that harmonic wave analysis results with high precision are obtained and thus reliability of an MOA resistive current test based on the theory of harmonic wave analysis is enhanced.

The invention discloses a harmonic wave analysis method for an electric energy quality harmonic wave analyzer. The harmonic wave analysis method is improved and implemented on the basis of quasi-synchronous discrete Fourier transformation (DFT) and comprises the following steps of: sampling an electric signal X which is needed to be subjected to harmonic wave analysis in a power grid, and sampling (W+2) sampling point data at equal intervals; when the quasi-synchronous DFT for the harmonic wave analysis is applied, changing a frequency domain sampling position according to the drift mu of a signal frequency, wherein the frequency domain sampling position is mu2pi / N; and calculating the amplitude Pk=sqrt(a<k><2>+b<k><2>) and the initial phase angle phi<k>=tg<-1>(ak / bk) of each harmonic wave of the electric signal X, respectively calculating the amplitude percentages alpha=Pk / P1 *100% and the phase angle differences phi=phi<k> - phi<1> of amplitudes Pk and fundamental waves P1 of higher harmonic waves of a voltage signal V and a current signal I, outputting and displaying.

The invention provides a chromatographic workstation with a fused peak baseline adjusting function. The chromatographic workstation comprises: a starting baseline unit for connecting a starting point and a falling point to form a preparatory baseline; a penetration determining unit for determining whether a baseline penetrates or not, triggering a baseline updating unit if so and triggering a baseline adjusting unit if not; the baseline updating unit for using points from a first end point to a top point in a point-by-point manner as experiment points if a penetrating point exists, and connecting the experiment points and a second end point to form a new preparatory baseline until no baseline penetrates, and triggering the baseline adjusting unit, wherein the first end point is a starting point, the second end point is a falling point and the top point is the top point of a first peak, or the first end point is a falling point, the second end point is a starting point and the top point is the top point of a last peak; and the baseline adjusting unit for using the newly formed preparatory baseline as an adjusted actual baseline. The chromatographic workstation has the advantages of reduction of the error in the quantitative analysis of the fused peak of a sample to be measured, improvement of the accuracy of quantitative analysis, simplicity and labor saving.

The invention relates to a dielectric loss measuring method which is realized by improvement based on quasi-synchronization DFT. The dielectric loss measuring method comprises the following steps that a voltage signal V applied to a tested piece and a current signal I flowing through the tested piece are sampled simultaneously; a cardinal wave phase angle phi<V1> applying voltage is acquired by applying a quasi-synchronization DFT harmonic phase angle linear modification method; a cardinal wave initial phase angle phi<I1> of the current signal flowing through the tested piece is acquired by applying the quasi-synchronization DFT harmonic phase angle linear modification method; and dielectric loss angle tangent is calculated according to the formula tgdelta=tg[pi / 2-(ph<I1>-phi<V1>)]. The dielectric loss measuring method is suitable for effectively improving analysis error of the quasi-synchronization DFT harmonic analysis technology to acquire a high-precision harmonic phase angle analysis result so that reliability of dielectric loss measurement can be enhanced.