Abstract: A method for constructing a large-span station by two-wing open type semi-covered excavation and semi-reverse construction, is divided into three stages of excavation. First, excavate a first-stage inner small foundation pit, then excavate a second-stage annular foundation pit within the first-stage retaining piles and outside the range of the first-stage inner small foundation pit, and finally excavate a third-stage semi-covered excavation foundation pit below the first-stage inner small foundation pit and the second-stage annular foundation pit. By setting graded retaining piles, middle upright post piles, middle top plates, local waist beams and local concrete supports in the soil-rock combination strata, so that the force transfer between the foundation pit enclosure and the station main body structures and the underlying rock layer is clear and reliable, and a stable frame structure is achieved.

Abstract: A method for constructing a large-span station by two-wing open type semi-covered excavation and semi-reverse construction, is divided into three stages of excavation. First, excavate a first-stage inner small foundation pit, then excavate a second-stage annular foundation pit within the first-stage retaining piles and outside the range of the first-stage inner small foundation pit, and finally excavate a third-stage semi-covered excavation foundation pit below the first-stage inner small foundation pit and the second-stage annular foundation pit. By setting graded retaining piles, middle upright post piles, middle top plates, local waist beams and local concrete supports in the soil-rock combination strata, so that the force transfer between the foundation pit enclosure and the station main body structures and the underlying rock layer is clear and reliable, and a stable frame structure is achieved.

Abstract: A multi-sector data correction method for gamma imaging while drilling includes the steps of: (a) dividing each gamma imaging sector into a plurality of counting zones; (b) counting a number of valid counting pulses for each counting zone at a predetermined time interval during MWD; (c) constructing a plurality of measurement vectors based on a value of recording times of each counting zone; (d) establishing a correction matrix with a conditional number less than a set value through an optimization algorithm; and (e) calculating a gamma intensity of each measured sector with the plurality of measurement vectors and the correction matrix as constructed, so as to complete the correction on the measurement data of each measured sector for each predetermined time interval. This method eliminate problems such as rotational measurement distortion of the gamma imaging while drilling tool and improve the accuracy of calculating the formation dip angle.

Abstract: A steerable drilling device has an outer tube extending along a longitudinal axis; a drill bit joint inserted into said outer tube, a lower end of said drill bit joint extending out of a lower end of said outer tube for connection to a drill bit; a joint drive mechanism, provided in said outer tube and configured to drive said drill bit joint to swing relative to the longitudinal axis; and a lower connection mechanism. The lower connection mechanism has a connection body connected to said joint drive mechanism in such a manner that said joint drive mechanism is non-rotatable with respect to said connection body, a first centralizer arranged between said connection body and said outer tube, a circuit system arranged in said connection body and configured to provide an electrical signal to said joint driving mechanism, and an attitude sensor arranged in said connection body.

Abstract: An intelligent forklift and a method for detecting a pose deviation of a container are provided. The intelligent forklift includes a working state monitor, an image sensor, and a processor. The working state monitor is configured to monitor a working state of the intelligent forklift while the intelligent forklift is carrying and moving a stock container and send a trigger to the image sensor based on the working state. The image sensor is configured to capture an RGBD image frame containing the stock container in response to the trigger and to transmit the RGBD image frame to the processor. The processor is configured to receive the RGBD image frame, detect a pose deviation degree of the stock container and provide an alarm and/or a prompt based on a detection result of the pose deviation degree for adjusting the pose of the stock container.

Abstract: An intelligent forklift and a method for detecting a pose deviation of a container are provided. The intelligent forklift includes a working state monitor, an image sensor, and a processor. The working state monitor is configured to monitor a working state of the intelligent forklift while the intelligent forklift is carrying and moving a stock container and send a trigger to the image sensor based on the working state. The image sensor is configured to capture an RGBD image frame containing the stock container in response to the trigger and to transmit the RGBD image frame to the processor. The processor is configured to receive the RGBD image frame, detect a pose deviation degree of the stock container and provide an alarm and/or a prompt based on a detection result of the pose deviation degree for adjusting the pose of the stock container.

Abstract: A granular conductive carbon black and a preparation method thereof, belonging to the technical field of conductive carbon blacks. The method for preparing a granular conductive carbon black includes making a raw material of the conductive carbon black undergo moistening with water of a temperature of 80° C. or higher, performing wet granulation and drying in sequence. The raw material of the conductive carbon black is infiltrated by the water of a temperature of 80° C. or higher, so that the hydrophilic property of the raw material of the conductive carbon black is enhanced, the water of a temperature of 80° C. or higher enters the microporous structures of the raw material of the conductive carbon black, then a good moistening effect is achieved, and further the granular conductive acetylene carbon black with uniform particle size distribution is prepared through wet granulation and drying.

Abstract: A granular conductive carbon black and a preparation method thereof, belonging to the technical field of conductive carbon blacks. The method for preparing a granular conductive carbon black includes making a raw material of the conductive carbon black undergo moistening with water of a temperature of 80° C. or higher, performing wet granulation and drying in sequence. The raw material of the conductive carbon black is infiltrated by the water of a temperature of 80° C. or higher, so that the hydrophilic property of the raw material of the conductive carbon black is enhanced, the water of a temperature of 80° C. or higher enters the microporous structures of the raw material of the conductive carbon black, then a good moistening effect is achieved, and further the granular conductive acetylene carbon black with uniform particle size distribution is prepared through wet granulation and drying.

Abstract: Disclosed are a production method for efficiently controlling a specific surface area of conductive carbon black, and a material delivering device. The production method for efficiently controlling a specific surface area of conductive carbon black includes making acetylene mixed with a hydrocarbon raw material undergo a pyrolysis reaction at 1300 to 1500° C., wherein the hydrocarbon raw material includes one, or a combination of more than one, of hydrocarbon compounds. When acetylene is introduced to undergo a pyrolysis reaction at 1800° C., conductive carbon black is obtained with a specific surface area of generally 80 m2/g or more. When acetylene is mixed with a hydrocarbon raw material so that the temperature of the pyrolysis reaction is reduced to 1300 to 1500° C., conductive carbon black is obtained with a specific surface area of substantially from 40 to 80 m2/g by controlling the pyrolysis temperature.

Abstract: Disclosed are a production method for efficiently controlling a specific surface area of conductive carbon black, and a material delivering device. The production method for efficiently controlling a specific surface area of conductive carbon black includes making acetylene mixed with a hydrocarbon raw material undergo a pyrolysis reaction at 1300 to 1500° C., wherein the hydrocarbon raw material includes one, or a combination of more than one, of hydrocarbon compounds. When acetylene is introduced to undergo a pyrolysis reaction at 1800° C., conductive carbon black is obtained with a specific surface area of generally 80 m2/g or more. When acetylene is mixed with a hydrocarbon raw material so that the temperature of the pyrolysis reaction is reduced to 1300 to 1500° C., conductive carbon black is obtained with a specific surface area of substantially from 40 to 80 m2/g by controlling the pyrolysis temperature.