Abstract: A flow splitting device for gas reverse circulation drilling, including: an upper joint for connecting with a double-wall drill pipe; an inner tube which is arranged in the upper joint and defines a first passageway in communication with an inner chamber of the double-wall drill pipe, a second passageway in communication with an annular space in the double-wall drill pipe formed between the inner tube and the upper joint; a lower joint, having an upper end fixedly connected with the upper joint and a lower end for connecting with a drill tool; and a flow guiding member provided between the upper joint and the lower joint. A flexible sealing mechanism is provided outside the upper joint. The flexible sealing mechanism extends radially outward relative to the upper joint and the lower joint to form a sealing contact with a wellbore wall.

Abstract: A technique for data reconstruction includes determining a plurality of types of data stored in a storage disk; determining an order in which data reconstruction is to be performed on the plurality of types of data based on corresponding likelihoods that the plurality of types of data are expected to be accessed; and performing the data reconstruction on the plurality of types of data in the determined order. Such a technique can improve system performance during data reconstruction and reduce the access delay.

Abstract: Techniques for managing a disk involve acquiring a message for an access operation for a disk, the message including a first status code at an operating system level for the access operation. The techniques further involve acquiring a second status code at a disk hardware level for the access operation if it is determined that the first status code indicates that the access operation fails. The techniques further involve determining, according to a handling policy corresponding to the second status code, whether the disk will be marked as faulty. The techniques further involve managing the disk based on a count of failed access operations for the disk if it is determined that the disk is not marked as faulty. Such techniques may quickly determine a specific reason for a failure of a disk access operation, making it possible to solve problems quickly, save time and improve the user experience.

Abstract: The present disclosure provides a method and apparatus to perform an electrochemical process by manipulating the charge on an electrode involved in the primary circuit of the electrochemical reaction. The amount of charge on the electrode can be manipulated independent of the bias voltage of the primary circuit and is accomplished by coupling the electrode with various different configurations.

Abstract: Techniques for managing a storage system involve cleaning up a persistent storage disk in a backup mode to increase a writing rate of the persistent storage disk. The techniques further involve creating a library partition in the cleaned persistent storage disk. The techniques further involve writing cache data in a volatile storage device into the library partition. Accordingly, in a storage device with only a single persistent storage disk, cache data in a volatile storage device can be written into the persistent storage disk at a relatively high writing rate, thereby achieving efficient memory persistence.

Abstract: A method for fabricating carbon nanoparticle polymer matrix composites includes the steps of: providing a nanoparticle mixture that includes carbon nanoparticles (CNPs), mixing the nanoparticle mixture and a plastic substrate into a homogenous (CNP)/polymer mixture having an interconnected network of carbon nanoparticles (CNPs); and irradiating the (CNP)/polymer mixture with electromagnetic radiation controlled to form a polymer composite and uniformly consolidate and/or interfacially bond the carbon nanoparticles (CNPs) into the polymer matrix.

Abstract: A method for fabricating carbon nanoparticle polymer matrix composites includes the steps of: providing a nanoparticle mixture that includes carbon nanoparticles (CNPs), mixing the nanoparticle mixture and a plastic substrate into a homogenous (CNP)/polymer mixture having an interconnected network of carbon nanoparticles (CNPs); and irradiating the (CNP)/polymer mixture with electromagnetic radiation controlled to form a polymer composite and uniformly consolidate and/or interfacially bond the carbon nanoparticles (CNPs) into the polymer matrix.

Abstract: Techniques for submitting unaligned IO data to an alignment-required IO stack of a storage system. The techniques include determining that IO data specified by an IO command contains unaligned IO data, and generating an IOCB and a tunneling IOCB. The IOCB includes information pertaining to the tunneling IOCB and the tunneling IOCB includes information pertaining to a sector-unaligned buffer for storing the IO data. The tunneling IOCB satisfies a sector-alignment requirement of an IO stack. The techniques include, in response to submitting the IO command and the information included in the IOCB to the IO stack, determining that the tunneling IOCB satisfies the sector-alignment requirement of the IO stack; having satisfied the sector-alignment requirement, building a driver command based on the IO command and the information included in the tunneling IOCB; and, transferring, by executing the driver command, the unaligned IO data from the sector-unaligned buffer to a storage device.

Abstract: Techniques involve: acquiring, through a first downstream port of a first switch of a data storage system, information indicating an error of a storage device array from a second switch of the data storage system, wherein the first switch and the second switch are connected to the storage device array and the first downstream port is connected to a second downstream port of the second switch; executing, based on the acquired information, actual actions intended for solving the error; and in response to the executed actual actions failing to match with expected actions for the error, issuing an alarm indicating failure of processing the error.

Abstract: Techniques for managing a disk involve acquiring a message for an access operation for a disk, the message including a first status code at an operating system level for the access operation. The techniques further involve acquiring a second status code at a disk hardware level for the access operation if it is determined that the first status code indicates that the access operation fails. The techniques further involve determining, according to a handling policy corresponding to the second status code, whether the disk will be marked as faulty. The techniques further involve managing the disk based on a count of failed access operations for the disk if it is determined that the disk is not marked as faulty. Such techniques may quickly determine a specific reason for a failure of a disk access operation, making it possible to solve problems quickly, save time and improve the user experience.

Abstract: Techniques for managing a storage system involve cleaning up a persistent storage disk in a backup mode to increase a writing rate of the persistent storage disk. The techniques further involve creating a library partition in the cleaned persistent storage disk. The techniques further involve writing cache data in a volatile storage device into the library partition. Accordingly, in a storage device with only a single persistent storage disk, cache data in a volatile storage device can be written into the persistent storage disk at a relatively high writing rate, thereby achieving efficient memory persistence.

Abstract: Techniques for submitting unaligned IO data to an alignment-required IO stack of a storage system. The techniques include determining that IO data specified by an IO command contains unaligned IO data, and generating an IOCB and a tunneling IOCB. The IOCB includes information pertaining to the tunneling IOCB and the tunneling IOCB includes information pertaining to a sector-unaligned buffer for storing the IO data. The tunneling IOCB satisfies a sector-alignment requirement of an IO stack. The techniques include, in response to submitting the IO command and the information included in the IOCB to the IO stack, determining that the tunneling IOCB satisfies the sector-alignment requirement of the IO stack; having satisfied the sector-alignment requirement, building a driver command based on the IO command and the information included in the tunneling IOCB; and, transferring, by executing the driver command, the unaligned IO data from the sector-unaligned buffer to a storage device.

Abstract: A technique for data reconstruction includes determining a plurality of types of data stored in a storage disk; determining an order in which data reconstruction is to be performed on the plurality of types of data based on corresponding likelihoods that the plurality of types of data are expected to be accessed; and performing the data reconstruction on the plurality of types of data in the determined order. Such a technique can improve system performance during data reconstruction and reduce the access delay.

Abstract: Techniques involve: acquiring, through a first downstream port of a first switch of a data storage system, information indicating an error of a storage device array from a second switch of the data storage system, wherein the first switch and the second switch are connected to the storage device array and the first downstream port is connected to a second downstream port of the second switch; executing, based on the acquired information, actual actions intended for solving the error; and in response to the executed actual actions failing to match with expected actions for the error, issuing an alarm indicating failure of processing the error.

Abstract: A nanostructured material includes carbon nanoparticles (CNPs), such as carbon nanotube particles (CNTs) or carbon nanofiber particles (CNFs), intercalated by intercalation nanoparticles (INPs), such as halloysite nanoparticles (HNPs), in a base material, such as a polymer. A method for making the nanostructured material includes the steps of: providing a mixture of carbon nanoparticles (CNPs) having a selected composition; providing intercalation nanoparticles (INPs) configured to intercalate the carbon nanoparticles (CNPs); intercalating the carbon nanoparticles (CNPs) by mixing the intercalation nanoparticles (INPs) in a selected CNP:HNP ratio to form an intercalated material; and combining the intercalated material in a base material in a selected concentration with the base material providing a matrix for the intercalated material.

Abstract: The present disclosure relates to a FMCW Light Detection and Ranging system, a wave train of carrier frequency is modulated in narrow-band sequence, an delay interferometer with in-phase and quadrature outputs extracts the phase of this frequency modulation, and a coherent receiver with in-phase and quadrature outputs detects the phase of reflected light from a remote object, the ratio between two phases determines the distance of the remote object.

Abstract: The present disclosure provides a method and apparatus to perform an electrochemical process by manipulating the charge on an electrode involved in the primary circuit of the electrochemical reaction. The amount of charge on the electrode can be manipulated independent of the bias voltage of the primary circuit and is accomplished by coupling the electrode with various different configurations.

Abstract: The present disclosure provides a pattern density analysis method for analyzing a local pattern density of a layout, the method comprising: obtaining a pattern attribute of each layout pattern located on a layout region to be analyzed; setting, for each layout pattern, a relevant window for the layout pattern based on the corresponding pattern attribute; calculating the pattern density of each relevant window; and selecting the maximum value of the pattern densities of the relevant windows as the maximum local pattern density of the layout, and selecting the minimum value of the pattern densities of the relevant windows as the minimum local pattern density of the layout.

Abstract: The present disclosure relates to a FMCW Light Detection and Ranging system, a wave train of carrier frequency is modulated in narrow-band sequence, an delay interferometer with in-phase and quadrature outputs extracts the phase of this frequency modulation, and a coherent receiver with in-phase and quadrature outputs detects the phase of reflected light from a remote object, the ratio between two phases determines the distance of the remote object.

Abstract: A method for fabricating carbon nanoparticle polymer matrix composites includes the steps of: providing a nanoparticle mixture that includes carbon nanoparticles (CNPs), mixing the nanoparticle mixture and a plastic substrate into a homogenous (CNP)/polymer mixture having an interconnected network of carbon nanoparticles (CNPs); and irradiating the (CNP)/polymer mixture with electromagnetic radiation controlled to form a polymer composite and uniformly consolidate and/or interfacially bond the carbon nanoparticles (CNPs) into the polymer matrix.