10 results about "Sedimentation coefficient" patented technology

The invention provides a soil humidity detection method and system, and the method comprises the steps: determining the soil water potential of each horizontal sampling point through the soil moisture of each horizontal sampling point, and determining the diffusion attenuation rate of the humidity in a target soil region on the horizontal scale through all soil water potentials and the soil moisture tension on the horizontal scale in the target soil region; determining a sedimentation coefficient of moisture in the target soil area according to the soil moisture of each vertical sampling point, and determining permeation distribution of humidity in the target soil area on the depth scale according to the sedimentation coefficient; performing scale fusion on the attenuation rate of the humidity diffused on the horizontal scale and the permeation distribution on the depth scale to obtain the diffusion gradient of the humidity of the target soil area on the spatial scale; performing confidence humidity detection on the target soil area based on the diffusion gradient of the humidity to obtain a confidence humidity value of the target soil area; by adopting the scheme provided by the invention, multi-scale space detection of the soil humidity can be realized, so that the credible range of soil humidity detection is increased.

Methods of characterizing biomolecular formulations are provided. In some examples, there is provided a method of characterizing a viral particle formulation, the method comprising subjecting the viral particle formulation to analytical ultracentrifugation under sedimentation velocity conditions, measuring sedimentation of the viral particle at a plurality of points in time, determining a friction ratio function c (s, ff0) and a sedimentation coefficient for the viral particle formulation, mapping the sedimentation coefficient (S) with the c (s, ff0) to obtain c (s, ff0), and characterizing the c (s, ff0). Ff0) distribution, and characterizing the presence and / or relative composition of viral particles comprising a totiviral genome, a partial viral genome, an over-packaged viral genome, and / or an empty viral particle in the viral particle formulation.

The present invention discloses a subsidence monitoring method and system for geological exploration, relating to the field of data processing technology. The method comprises: obtaining a target optical fiber echo signal from a target exploration area in a current time period, and historical optical fiber echo signals from the target exploration area in historical time periods; determining a target first geological sedimentation coefficient for the target exploration area at the current moment based on the target optical fiber echo signal, and determining a second geological sedimentation coefficient for the target exploration area at the current moment based on the historical optical fiber echo signals; determining the geological sedimentation degree of the target exploration area at the current moment based on the target first geological sedimentation coefficient and the second geological sedimentation coefficient; and issuing a geological sedimentation warning message if the geological sedimentation degree is greater than a preset sedimentation threshold. According to the present invention, the accuracy of subsidence monitoring can be improved.

Methods of characterizing a preparation of biomolecules are provided. In some examples, methods of characterizing a preparation of viral particles are provided, including subjecting the preparation of viral particles to analytical ultracentrifugation under sedimentation velocity conditions, measuring sedimentation of the viral particles at a plurality of time points, determining a frictional ratio function c(s,ff0) and a sedimentation coefficient for the preparation of viral particles, plotting the c(s,ff0) versus the sedimentation coefficient(S) to obtain a c(s,ff0) distribution, and characterizing the presence and / or relative composition of viral particles comprising full viral genomes, partial viral genomes, overpackaged viral genomes, and / or empty viral particles in the preparation of viral particles.

1. The name of the design product: high-speed centrifuge. 2. The use of the design product: the design product is used for separating and concentrating the particles in the suspension, i.e. using strong centrifugal force to separate and concentrate the particles in the suspension with different physical properties (such as mass, buoyancy, sedimentation coefficient, etc.). 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best shows the design points: perspective view.

The invention provides a long-acting stable well completion test fluid. Compared with the prior art, the well completion fluid has the advantages that the micro-crosslinked polymer suspension stabilizer is used as a main agent, the structure of the micro-crosslinked polymer suspension stabilizer has good high-temperature stability, the overall molecular space structure is optimized based on the crosslinking capacity of Ca < 2 + >, the action strength with bentonite is improved, the capacity of suspending barite is improved, and the sedimentation stability of the well completion test fluid is guaranteed; the well completion test fluid with the density of 1.2-2.4 g / cm < 3 > and the temperature of 180-210 DEG C is formed, the rheological property and the filter loss are good after the well completion test fluid is aged after standing for 15 days at the temperature of 210 DEG C, the sedimentation coefficient is smaller than 0.520, and the well completion test fluid can fall to the bottom. The system meets the requirements of high-temperature deep well completion test operation on long-term high-temperature sedimentation stability, rheological property and the like, and has the advantages of simple preparation process, convenience in operation and the like.

The invention relates to the technical field of geological exploration, in particular to a carbonate reservoir fracture-cavity structure characterization method based on a tracer technology, which comprises the following steps: introducing a settlement coefficient kdep to characterize the settlement effect of a tracer, introducing an adsorption factor R to characterize the adsorption effect of the tracer, and calculating the fracture-cavity structure of the carbonate reservoir based on the tracer technology. Respectively establishing a tracer seepage model in a crack channel and a tracer seepage model in a karst cave channel; the method comprises the following steps: regarding a fracture-cave reservoir as a form of series connection of fractures and karst caves, and establishing a tracer seepage model in a fracture-karst cave channel; and establishing a tracer concentration curve fitting mathematical model, fitting an actually measured tracer output concentration curve on the basis of the tracer seepage mathematical model, and performing inversion to obtain to-be-solved parameters in the tracer seepage mathematical model so as to realize quantitative characterization of the fracture-cavity structure of the carbonate reservoir. By means of the characterization method, quantitative characterization of the fracture-cavity structure of the carbonate reservoir can be achieved.

The invention relates to the field of water-sediment multiphase fluid dynamics, in particular to a horizontal circular tube suspended sediment concentration distribution prediction method based on a dynamic settlement coefficient, and effectively solves the problem of insufficient prediction precision caused by neglecting a water-sediment dynamic slippage effect in a traditional suspended sediment diffusion equation by introducing the dynamic settlement coefficient. Through the technical path of key point characterization, dynamic coefficient calculation, source item correction and efficient solution, dynamic factors influencing settlement are successfully quantified and embedded into an efficient calculation framework, and finally the purpose of remarkably improving the horizontal circular tube suspended sediment concentration distribution prediction precision on the premise of keeping the calculation efficiency of a traditional method is achieved. According to the method, the requirement of actual engineering for rapid and accurate prediction of suspended sediment concentration distribution is met, the effect of collaborative optimization of precision and efficiency is finally obtained, and a more reliable and economical technical solution is provided for design and operation of horizontal circular pipe sand-containing water transportation engineering.

The application belongs to the technical field of optical measurement, and particularly relates to a multi-angle dynamic light scattering particle measurement method and an analysis system. The method comprises the following steps: S1, loading a sample to be measured and completing system initialization, and configuring space-time scanning basic parameters; S2, collecting scattering light intensity signals and light intensity autocorrelation functions corresponding to each space-time micro area to obtain original measurement data; S3, performing noise reduction and baseline correction preprocessing on the original measurement data, and analyzing to obtain apparent fluid dynamic particle diameters and average scattering light intensities of each space-time micro area, and constructing a data matrix in the space-time dimension; S4, taking dynamic light scattering theory and a sedimentation kinetics equation as double physical constraints, performing global fitting on full space-time dimension data to obtain a true particle size distribution and a sedimentation coefficient distribution after correction of sedimentation deviation; and S5, based on the true particle size and the sedimentation coefficient, and in combination with viscosity and density parameters of a dispersion medium, calculating to obtain particle effective density and a sample sedimentation stability index.

The invention relates to a continuous particle size distribution radionuclide intra-cloud and under-cloud wet deposition online coupling prediction method, system, equipment and medium, and the method comprises the following steps: if the current rainfall intensity is not zero, determining the continuous particle size distribution of different components of a radioactive aerosol to be analyzed based on observation data; calculating an in-cloud wet sedimentation coefficient and an under-cloud wet sedimentation coefficient by using a Rosell in-cloud sedimentation model and a Baklanov under-cloud sedimentation model respectively to obtain a wet sedimentation coefficient of the radioactive aerosol to be analyzed; if the current rainfall intensity is zero, setting the wet sedimentation coefficient of the radioactive aerosol to be analyzed to be 0; on the basis of the wet sedimentation coefficient, the nuclide concentration and the sedimentation result of the radioactive aerosol to be analyzed are obtained through calculation by means of a WRF-Chem model. The method can be widely applied to the technical field of core application.