Abstract: A quantitative prediction method for gas content of deep marine shale includes: obtaining raw data of known wells; establishing relationship formulas between pore specific surface areas and adsorbed gas contents of a known well in an area as an adsorbed gas content quantitative prediction model; establishing relationship formulas between pore volumes and free gas contents of the known well as a free gas content quantitative prediction model; summing the adsorbed gas contents and corresponding free gas contents to obtain total gas contents; calculating adsorbed gas contents, free gas contents and total gas contents of the known wells; drawing a predicted adsorbed gas content contour map, a predicted free gas content contour map and a predicted total gas content contour map; and reading an adsorbed gas content, a free gas content and a total gas content of an unknown well in the area from the above contour maps.

Abstract: A manganese-based carbonate precursor of a positive electrode material for a secondary battery has a specific structure and composition and contains a trace amount of uniformly distributed Na element, a content of Na is in a range of 0.5-3 mol %, which range can ensure that the structural integrity and consistency of carbonate crystals are not affected. In addition, the trace amount of Na element is uniformly distributed inside the manganese-based carbonate precursor provided in the present application, and by means of simple mixing with a lithium source and sintering, a lithium-rich manganese-based material uniformly doped with Na element can be directly obtained without the need for introducing other Na source, whereby uneven doping of Na is effectively avoided, the doping effect is improved, and the electrical properties of the material are significantly improved.

Abstract: A method for combined characterization of pore structure includes steps as follows. Firstly, CO2, N2 and high-pressure mercury intrusion porosimetry characterization curves are plotted based on actual measurement data, then, average values of the overlapping range of the CO2 and N2 characterization curves are calculated, and a function yi?=ƒ(x) is fitted. Each pore volume yi? corresponding to each pore diameter xi is calculated, and a curve is plotted with xi as a horizontal coordinate and yi? as a vertical coordinate, thereby obtaining a characterization curve of the overlapping range between CO2 and N2 adsorptions. The same data processing is used to process the overlapping range data of the N2 and high-pressure mercury intrusion porosimetry characterization curves, to obtain the characterization curve between them. The characterization curves are spliced with the original CO2, N2, and high-pressure mercury intrusion porosimetry characterization curves to obtain a combined characterization curve.

Abstract: A method for calculating a surface relaxation rate of a shale includes: a relaxation time T distribution curve and a pore throat radius r distribution curve are obtained through experiments; abscissas of the two distribution curves are standardized, and the abscissa of the relaxation time T distribution curve is expanded or shrunk to ensure an abscissa value corresponding to a maximum ordinate value in the transformed relaxation time T distribution curve is same as an abscissa value corresponding to a maximum ordinate value in the pore throat radius r distribution curve; straight lines with a number of N parallel to a y-axis of a combined curve graph including the two distribution curves are drawn and a ? value corresponding to each straight line is calculated; and ? value with the number of N are processed to obtain a final surface relaxation rate ??.

Abstract: Provided is an analysis method for determining gas-bearing situation of an unknown shale reservoir, includes: S1, selecting a shale reservoir of a target interval of a place; and collecting data of parameters of cores of each of a known gas-bearing shale reservoir A and a known water-bearing shale reservoir B; S2, calculating average values of the parameters of each of the reservoirs A and B respectively; S3, calculating average differences of the parameters of each of the reservoirs; S4, calculating covariance values of the parameters of each of the reservoirs; S5, establishing, according to the covariance values, an equation group and resolving discriminant coefficients; S6, establishing a discriminant equation according to the discriminant coefficients and solving a discriminant index; and S7, obtaining values of parameters of cores of a sample of the unknown shale reservoir, calculating a discriminant value, and determining gas-bearing situation of the unknown shale reservoir.

Abstract: Provided is an analysis method for determining gas-bearing situation of an unknown shale reservoir, includes: S1, selecting a shale reservoir of a target interval of a place; and collecting data of parameters of cores of each of a known gas-bearing shale reservoir A and a known water-bearing shale reservoir B; S2, calculating average values of the parameters of each of the reservoirs A and B respectively; S3, calculating average differences of the parameters of each of the reservoirs; S4, calculating covariance values of the parameters of each of the reservoirs; S5, establishing, according to the covariance values, an equation group and resolving discriminant coefficients; S6, establishing a discriminant equation according to the discriminant coefficients and solving a discriminant index; and S7, obtaining values of parameters of cores of a sample of the unknown shale reservoir, calculating a discriminant value, and determining gas-bearing situation of the unknown shale reservoir.

Abstract: The present application relates to a balloon catheter, which is a rapid exchange structure and has a balloon catheter body and a hub, wherein the balloon catheter body has a push member, a transition member, a balloon loading member, a balloon, a imaging mark and a tip head, the balloon loading member comprises an outer tube and an inner tube, a distal end of the handle is connected with a proximal end of the push member, a proximal end of the transition member extends from a distal end of the push member, a distal end of the transition member is nested inside a proximal end of the outer tube of the balloon loading member, the balloon loading member loads the balloon, the tip head is provided on a distal end of the balloon, the imaging mark is provided on the balloon loading member, characterized in that the balloon has a wall thickness of 10-15 microns, the balloon has a nominal dilation pressure of 3-4 atm, and the balloon catheter has a rated burst pressure of is 10-12 atm.

Abstract: A method for determining a protein structure using cryo-electron microscopy, including: enabling a target protein to contain a tag; enabling a resulting target containing the tag to bind a scaffold protein to form a complex between the target protein and the scaffold protein; and performing single-particle imaging using the cryo-electron microscopy to determine a structure of the target protein in complex with the scaffold protein. The scaffold protein is any one of streptavidin, avidin, or derivatives thereof. The tag is configured for selectively binding to the scaffold protein. The tag is one selected from the group consisting of: a biotin tag, comprising a biotin; a biotinylated protein or polypeptide tag, comprising a protein sequence and a biotin covalently linked to the protein sequence; a Strep-tag; and a biotinylated or strep-tagged antibody, or antibody Fab fragment, or single-chain antibody.

Abstract: A surge protective device includes a first electrode terminal and a second electrode terminal; n gap units, connected in series between the first electrode terminal and the second electrode terminal sequentially, where a common terminal is formed between adjacent gap units; k first trigger circuits, the k first trigger circuits each include a first terminal connected to one of the common terminals, and a second terminal connected to the second electrode terminal; and m second trigger circuits, the m second trigger circuits each include a first terminal connected to one of the common terminals, and a second terminal connected to the first electrode terminal, where any one of the common terminals is connected only to either the first terminal of one of the first trigger circuits or the first terminal of one of the second trigger circuits.

Abstract: The present disclosure provides a device and method for diagnosing risk of insufficient hole cleaning problem during drilling wells. The method includes obtaining the measured pressure via several measuring points, and obtaining actually measured value of each measuring point; calculate the theoretical pressure at each measuring points by using the real-time operational data as inputs, evaluating a hole cleaning condition by applying a difference between a theoretical pressure drop and a measured pressure drop to a developed pressure driven hole cleaning model, which gives the risk of insufficient hole cleaning problems and problematic locations. The theoretical pressure drop between two adjacent measurement points along wellbore includes the pressure drop caused by friction effect and hydrostatic effect. However, suspended cuttings in actual drilling fluid may significantly change the pressure drop along wellbore.

Abstract: A data processing method includes: collecting test data of a target rock sample in different gas adsorption experiments; the test data including pore sizes and pore volumes corresponding to the pore sizes and including at least two selected from the group consisting of the test data with pore sizes less than 3 nm in CO2 adsorption experiment, the test data with pore sizes in 1.5 nm to 250 nm in N2 adsorption experiment and the test data with pore sizes in 10 nm to 1000 ?m in high-pressure mercury adsorption experiment; and fitting the test data in overlapping ranges of the pore sizes using a least square method, and obtaining target pore volumes corresponding to the pore sizes respectively. The accuracy of joint characterization of shale pore structures can be improved by using mathematical methods to process the data in overlapping ranges of pore sizes among different characterization methods.

Abstract: A data processing method includes: collecting test data of a target rock sample in different gas adsorption experiments; the test data including pore sizes and pore volumes corresponding to the pore sizes and including at least two selected from the group consisting of the test data with pore sizes less than 3 nm in CO2 adsorption experiment, the test data with pore sizes in 1.5 nm to 250 nm in N2 adsorption experiment and the test data with pore sizes in 10 nm to 1000 ?m in high-pressure mercury adsorption experiment; and fitting the test data in overlapping ranges of the pore sizes using a least square method, and obtaining target pore volumes corresponding to the pore sizes respectively. The accuracy of joint characterization of shale pore structures can be improved by using mathematical methods to process the data in overlapping ranges of pore sizes among different characterization methods.

Abstract: The present disclosure provides a capacitance compensation module, a capacitance compensation method, a self-capacitive touch display panel and a self-capacitive touch display device.

Abstract: The present disclosure provides a capacitance compensation module, a capacitance compensation method, a self-capacitive touch display panel and a self-capacitive touch display device.

Abstract: The present application relates to a balloon catheter, which is a rapid exchange structure and has a balloon catheter body and a hub, wherein the balloon catheter body has a push member, a transition member, a balloon loading member, a balloon, a imaging mark and a tip head, the balloon loading member comprises an outer tube and an inner tube, a distal end of the handle is connected with a proximal end of the push member, a proximal end of the transition member extends from a distal end of the push member, a distal end of the transition member is nested inside a proximal end of the outer tube of the balloon loading member, the balloon loading member loads the balloon, the tip head is provided on a distal end of the balloon, the imaging mark is provided on the balloon loading member, characterized in that the balloon has a wall thickness of 10-15 microns, the balloon has a nominal dilation pressure of 3-4 atm, and the balloon catheter has a rated burst pressure of is 10-12 atm.

Abstract: The invention relates to a high-safety surge protective device which comprises a casing, at least one overvoltage protection component inside the casing, a release unit used to separate the overvoltage protection component from the AC or DC circuit or the equipment, an arc suppressing apparatus used to suppress electric arc generated while separating the overvoltage protection component from the AC or DC circuit or the equipment, and a box, Wherein: the release unit comprises a compression spring, a metal dome, a slide and a soft conductor; the arc suppressing apparatus comprises an arc chute assembly, a first arc striking sheet, a second arc striking sheet, a turning block and a torsional spring.

Abstract: The invention relates to a high-safety surge protective device which comprises a casing, at least one overvoltage protection component inside the casing, a release unit used to separate the overvoltage protection component from the AC or DC circuit or the equipment, an arc suppressing apparatus used to suppress electric arc generated while separating the overvoltage protection component from the AC or DC circuit or the equipment, and a box, Wherein: the release unit comprises a compression spring, a metal dome, a slide and a soft conductor; the arc suppressing apparatus comprises an arc chute assembly, a first arc striking sheet, a second arc striking sheet, a turning block and a torsional spring.