Abstract: The present application discloses a calibration method for a logging-while-drilling device, which is used for measuring data on the sea level and comprises the following steps: horizontally suspending the logging-while-drilling device; measuring amplitudes and phases at different heights; horizontally rotating the logging-while-drilling device for multiple times, and measuring amplitudes and phases at different heights after each horizontal rotation; and when the sum of angles of the multiple horizontal rotations is greater than 360 degrees, calculating an azimuth correction factor according to the measured amplitudes and phases. As the calibration method for the logging-while-drilling device according to the present application is carried out on a wide seawater interface, the influence of the boundary effect can be eliminated; the uniform medium attributes of air and seawater can be simplified into a one-dimensional double-layer medium model.

Abstract: A structured adsorbent assembly is described, which is usefully employed for pressure swing adsorption (PSA) processing of ambient air to generate high purity oxygen. The structured adsorbent assembly in various implementations may include cellulosic carbon molecular sieve fibers formed by spinning of precursor cellulose followed by pyrolysis of the spun fibers, as an argon-selective adsorbent, or AgX zeolite contained on and/or in polymeric fibers, as an argon-selective adsorbent, and such argon-selective adsorbents may be in combination with nitrogen-selective adsorbent such as LiX zeolite contained on and/or in polymeric fibers. The structured adsorbent assembly may be employed in PSA systems and processes to achieve highly efficient and economic generation of high purity oxygen for applications such as distributed gasification power generation.

Abstract: A noise reduction measurement method of acoustic while drilling data based on signal synchronization is provided. The method performs pre-sampling before effective excitation of a low-frequency pulser, then extracts center frequency and phase information of noise of the low-frequency pulser by fast Fourier transform, and adjusts the excitation and sampling time of the acoustic signal according to the center frequency and phase information of the noise of the low-frequency pulser. Accordingly, the coincidence of the acoustic signal excited by the acoustic instrument and the acoustic signal generated by operation excitation of the pulser can be actively avoided, and the signal-to-noise ratio of the received signal of the acoustic instrument can be effectively improved.

Abstract: Disclosed is a shielding device of source mounting and demounting for a nuclear logging instrument including a device base and a shielding device body. The device base is directly placed on the ground or a well stand. The shielding device body is slidably assembled in an embedded slideway of the device base. During source mounting operation, a worker takes a source from a source container, and a radioactive source passes through the shielding device body through a circular hole of the shielding device body to be installed. During the source demounting operation, the radioactive source and the worker are arranged on both sides of the shielding device body during the operation at an instrument end. Through such design, the worker is allowed to calmly mount and demount the source in a relatively low radiation field.

Abstract: An antigen with an increased half-life is provided for the formulation of more stable and consistent clinical diagnostic immunoassay controls and calibrators. An antigen analogue comprises a first and a second polypeptide which is identical or similar to corresponding terminal amino acid sequences of an antigen. The first and second polypeptides are connected with a PEG chain. Also provided are methods of calibrating assays using a compound disclosed herein.

Abstract: A noise reduction measurement method of acoustic while drilling data based on signal synchronization is provided. The method performs pre-downsampling before effective excitation of a low-frequency impulse pump, then extracts center frequency and phase information of noise of the low-frequency impulse pump by fast Fourier transform, and adjusts the excitation and sampling time of the acoustic signal according to the center frequency and phase information of the noise of the low-frequency impulse pump. Accordingly, the coincidence of the acoustic signal excited by the acoustic instrument and the acoustic signal generated by operation excitation of the pulser can be actively avoided, and the signal-to-noise ratio of the received signal of the acoustic instrument can be effectively improved.

Abstract: The present invention discloses a method, equipment, and readable storage medium for tracking and evaluating the life cycle EUR of horizontal wells, and relates to the field of oil and gas development technology. The present invention divides the life cycle stages of fractured horizontal wells in unconventional oil and gas reservoirs, provides corresponding EUR evaluation steps for different life cycle stages based on the production performance characteristics of fractured horizontal wells in unconventional oil and gas reservoirs in the drilling and fracturing stage, extraction and testing stage, rapid production decline stage, and low pressure and small volume production stage, and establishes the EUR tracking and evaluation process of fractured horizontal wells in unconventional oil and gas reservoirs throughout their life cycle from drilling to abandonment.

Abstract: A vacuum sealing machine for automatically delivering and cutting packages includes a frame, a vacuum sealing mechanism arranged on the frame, a cutting and sealing mechanism arranged above the vacuum sealing mechanism, and a feeding mechanism arranged at a side of the vacuum sealing mechanism. The feeding mechanism pivots on the frame and a double-layer plastic film winds on the feeding mechanism; the vacuum sealing mechanism includes a reservoir box and an overflow tank arranged a side of the vacuum sealing machine; the reservoir box is connected with the vacuum sealing mechanism. The feeding mechanism pivots on the frame, the double-layer plastic film winds the feeding mechanism, the users can adjust the effective width of the feeding shaft according to the width of double-layer plastic film. The cutting and sealing mechanism can automatically seal the double-layer plastic film and cut a package with the appropriate size.

Abstract: The present disclosure is directed to a thin-film element that enables analytes to be analyzed on separate surfaces. In an example, a thin-film element includes a first layer for processing a fluid sample to generate a first analyte and a second analyte. The thin-film element also includes a second layer configured to be impermeable to the first analyte to enable the first analyte to be retained by the first layer and permeable to the second analyte to enable the second analyte to pass through the second layer. The thin-film element further includes a third layer configured to retain the second analyte. The second layer includes a first reflective surface and a second reflective surface to provide reflectance signals indicative of analytes present in the first and third layers to sensors located on opposite sides of the thin-film element.

Abstract: The present disclosure relates to a two-dimensional polymeric fullerene and preparation method thereof, wherein the preparation method includes the following steps: providing metal intercalated polymeric fullerene; replacing metal ions in the metal intercalated polymeric fullerene with quaternary ammonium salts. The preparation method of the two-dimensional polymeric fullerene of an embodiment of the present application has simple process and low cost, which can achieve large-scale preparation of two-dimensional polymeric fullerene.

Abstract: The present invention relates to alternating stress fatigue testing equipment. The alternating stress fatigue testing equipment includes a pedestal on which linear guide rails are arranged; a deflection loading device which is arranged on the pedestal and configured to, in response to a clamped to-be-measured object being driven to slide to a first position, enable the to-be-measured object to be bent to a target degree and keep the to-be-measured object after the to-be-measured object is bent to the target degree, wherein the deflection loading device is rotatably connected to the to-be-measured object; two hinged shaft supports which are arranged on the linear guide rails, wherein the hinged shaft supports are symmetrically arranged about a longitudinal center line of the deflection loading device, connected to both ends of the to-be-measured object respectively, and configured to be adjusted obliquely to adapt to the bending of the to-be-measured object to the target degree.

Abstract: The invention discloses a full wellbore pressure calculation method, device and computer-readable storage medium for fracturing horizontal wells, includes steps: collect basic parameters, establish fully implicit numerical model of formation flow; solve the full implicit numerical model under an inner boundary condition of a constant gas production rate; calculate wellbore pressure change of each fracturing section of horizontal well; calculate the bottom-hole pressure of each fracture initiation point; repeat steps until the variables converge, the bottom-hole flow pressure and the bottom-hole pressure at each fracture initiation point are obtained at this time step; the wellbore pressure and wellhead casing pressure are calculated at this time step.

Abstract: The invention discloses a full wellbore pressure calculation method, device and computer-readable storage medium for fracturing horizontal wells, includes steps: collect basic parameters, establish fully implicit numerical model of formation flow; solve the full implicit numerical model under an inner boundary condition of a constant gas production rate; calculate wellbore pressure change of each fracturing section of horizontal well; calculate the bottom-hole pressure of each fracture initiation point; repeat steps until the variables converge, the bottom-hole flow pressure and the bottom-hole pressure at each fracture initiation point are obtained at this time step; the wellbore pressure and wellhead casing pressure are calculated at this time step.

Abstract: A system enhances existing audio-visual content with an action a scene annotation module, an action description module, both of which are coupled to a controller. The scene annotation module classifies scene elements from an image frame received from a host system and generates a caption describing the scene elements. The scene annotation module includes a first neural network configured to generate a feature vector from the image frame and a second neural network configured to generate a caption describing elements within the image frame from the feature vector. The action description module recognizes action happening within one or more image frames received from the host system and generates a description of the action happening within one or more image frames.

Abstract: A method for analyzing the quality of a thin layer surface of PCB includes steps of taking a region to be tested from the PCB as a sample by scissors or an automatic sampler; performing gold spraying treatment; fixing a sample to be tested onto a metal sample platform, and then mounting the sample platform on the inclined surface of a test platform; depositing a first protective layer by an electron beam; after deposition with the electron beam is completed, depositing a second protective layer by a focused ion beam; adjusting the angle of inclination of the test platform to ensure that the surface of the sample can be cut perpendicular to the direction of the focused ion beam; and finally adjusting angle of inclination of the sample to perform observation. The method can avoid influences of chemical solutions, mechanical stress, and impurity contamination in the sample preparation process.

Abstract: The present invention relates to a piRNA-54265 detection kit used for early screening, diagnosis, efficacy monitoring and/or prognostic evaluation of colorectal cancer. The detection kit includes a primers combination, including a primer pair and a probe for specifically detecting piRNA-54265; the primer pair is a piRNA-54265 stem-loop PCR primer pair, or a piRNA-54265 PolyA tailed PCR primer pair; the primer pair includes a forward primer and a reverse primer.

Abstract: A system enhances existing audio-visual content with audio describing the setting of the visual content. A scene annotation module classifies scene elements from an image frame received from a host system and generates a caption describing the scene elements.

Abstract: A vacuum sealing machine for automatically delivering and cutting packages includes a frame, a vacuum sealing mechanism arranged on the frame, a cutting and sealing mechanism arranged above the vacuum sealing mechanism, and a feeding mechanism arranged at a side of the vacuum sealing mechanism. The feeding mechanism pivots on the frame and a double layer plastic film winds on the feeding mechanism; the vacuum sealing mechanism includes a reservoir box and an overflow tank arranged a side of the vacuum sealing machine; the reservoir box is connected with the vacuum sealing mechanism. The feeding mechanism pivots on the frame, the double layer plastic film winds the feeding mechanism, the users can adjust the effective width of the feeding shaft according to the width of double layer plastic film. The cutting and sealing mechanism can automatically seal the double layer plastic film and cut a package with appropriate size.

Abstract: The present invention relates to alternating stress fatigue testing equipment. The alternating stress fatigue testing equipment includes a pedestal on which linear guide rails are arranged; a deflection loading device which is arranged on the pedestal and configured to, in response to a clamped to-be-measured object being driven to slide to a first position, enable the to-be-measured object to be bent to a target degree and keep the to-be-measured object after the to-be-measured object is bent to the target degree, wherein the deflection loading device is rotatably connected to the to-be-measured object; two hinged shaft supports which are arranged on the linear guide rails, wherein the hinged shaft supports are symmetrically arranged about a longitudinal center line of the deflection loading device, connected to both ends of the to-be-measured object respectively, and configured to be adjusted obliquely to adapt to the bending of the to-be-measured object to the target degree.