摘要:
Organic compounds containing heteroatoms and their use in preparing Ziegler-Natta (Ziegler-Natta) catalyst with single activation center. The Ziegler-Natta olefin polymerization catalyst is preparing by adding organic or inorganic solid carrier or compound of them which is pre-activated by heating or pre-treated chemically, organic compound containing heteroatoms and metallic compound into magnesium compound/tetrahydrofuran solution. The Ziegler-Natta olefin polymerization catalyst prepared in the present invention is fluidizable powder and can prepare ethene homopolymer and copolymer of controllable construction with high catalytic activity, during homo-polymerization and combined polymerization with alpha-olefin of C3˜C18 under action of catalyst promoter such as alkyl aluminum, alkyl aluminoxane, and so on.
摘要:
In general, in one aspect, the invention relates to a method for determining a system integrity of an oilfield machine operatively coupled to a magnetic drive, wherein the magnetic drive is configured to provide a controlled operational speed, comprising adjusting a control on the oilfield machine such that the oilfield machine operates at a baseline speed, recording a raw system integrity measurement while the oilfield machine is operating at the baseline speed, and calculating the system integrity using the raw system integrity measurement and a baseline system integrity measurement.
摘要:
A smart coupon-delivery system provides targeted coupons to a user using a criteria-encoded message received from a coupon server. The criteria-encoded message is generated by the coupon server from a behavior-criteria vector that indicates criteria for selecting a recipient of a digital coupon. The system then generates a user-behavior vector to indicate one or more behavior patterns of an end-user, and encodes the user-behavior vector to produce a behavior-encoded message. The system then determines whether the end-user is eligible to receive the digital coupon based on the criteria-encoded message and the behavior-encoded message. If the system determines that the end-user is eligible, the system presents the digital coupon to the end-user.
摘要:
A support and cushioning device for supporting and holding an electronic device includes a first supporting assembly, a fixed bracket, an adjusting board, and a plurality of elastic members. The adjusting board is mounted to the distal end of the first support assembly. The fixed bracket is elastically mounted to the adjusting board by means of a plurality of elastic members. The fixed bracket includes a base body and a plurality of holding arms extending out from a periphery of the base body. The plurality of holding arms and the base body cooperatively define a holding space for holding an electronic device.
摘要:
A machining device includes a support platform, a machining assembly, a clamping assembly, a driving assembly, and a controlling assembly. The support platform includes a first supporting member, a sliding rail mounted on the first supporting member, and a second supporting member mounted on the sliding rail. The machining assembly mounted on the second supporting member includes a machining tool. The clamping assembly is mounted on the first supporting member, for clamping and rotating the workpiece. The driving assembly is fixed to the second supporting member. The controlling assembly includes a connecting member mounted on the second supporting member and a resisting member mounted on the connecting member. The driving member drives the second supporting member to slide along the sliding rail, to make a gradual and increasing depth of contact by the machining tool on the workpiece, until a preset limit is reached.
摘要:
A support and cushioning device for supporting and holding an electronic device includes a first supporting assembly, a fixed bracket, an adjusting board, and a plurality of elastic members. The adjusting board is mounted to the distal end of the first support assembly. The fixed bracket is elastically mounted to the adjusting board by means of a plurality of elastic members. The fixed bracket includes a base body and a plurality of holding arms extending out from a periphery of the base body. The plurality of holding arms and the base body cooperatively define a holding space for holding an electronic device.
摘要:
An electronic device housing includes a bottom housing, a support frame, a display panel, and a side frame. The bottom housing includes a base plate and four sidewalls extending from a periphery of the base plate. The support frame is welded to the sidewalls of the bottom housing. The support frame is received in the bottom housing and made up of at least two support plates, two ends of each are welded to ends of the adjacent support plates. The support frame forms at least two welding lines at joints of the at least two support plates, and each welding line corresponds to a middle portion of one sidewall. The display panel is positioned on the support frame sandwiched between the support frame and the side frame. The side frame is connected to a top edge of the bottom housing.
摘要:
In general, in one aspect, the invention relates to a method for determining a system integrity of an oilfield machine operatively coupled to a magnetic drive, wherein the magnetic drive is configured to provide a controlled operational speed, comprising adjusting a control on the oilfield machine such that the oilfield machine operates at a baseline speed, recording a raw system integrity measurement while the oilfield machine is operating at the baseline speed, and calculating the system integrity using the raw system integrity measurement and a baseline system integrity measurement.
摘要:
The present disclosure is related to the microwave measuring field, and in particularly to a coaxial resonant cavity and system and method for measuring the dielectric constant of material. The coaxial resonant cavity includes a coupling mechanism and a cavity body. The coupling mechanism is accommodated in the cavity body for exciting or coupling microwaves inside the cavity body. The coaxial resonant cavity further includes a probe extending out of the cavity body and being coaxial with the cavity body. The cavity body is shaped as an annular column, and a ratio of an outer radius of the annular column to an inner radius of the annular column is (3-5): 1. The present disclosure still provides a system and method for measuring the dielectric constant of material using the coaxial resonant cavity.
摘要:
The present invention provides a liquid crystal display panel including data lines that includes first data lines and second data lines, (2n+1)th row pixel units and (2n+2)th row pixel units connect with a same one of the scan lines. (2n+1)th column pixel units of the (2n+1)th row connect with the first data line, (2n+2)th column pixel units of the (2n+1)th row connect with the second data line, (2n+1)th column pixel units of the (2n+2)th row connect with the second data line, (2n+2)th column pixel units of the (2n+2)th row connect with the first data line.