Abstract: The present disclosure provides a carbon-based oxygen-enriched combustion method for recirculation of flue gas from a cement kiln. The combustion method includes recirculating the flue gas generated by the cement kiln to a certain degree to concentrate and enrich carbon dioxide in the flue gas of the cement kiln, mixing the carbon dioxide-rich recirculating flue gas of the cement kiln with the pressurized oxygen to obtain the carbon-based oxygen-enriched products, and mixing the carbon-based oxygen-enriched products with the atmospheric-pressure oxygen to obtain carbon-based air which serves as combustion-supporting gas of the cement kiln.

Abstract: A power device for an electric tool and system is provided that can power tool bodies of different electric tools. The power device includes a power control unit that receives a control instruction transmitted by the tool control unit and controls the motor according to control instructions. The power device not only improves the utilization rate of general modules, such as a motor and a battery pack, but also improves the expandability of the system, reduces the amount of programs in the power device, and eliminates the need to update the programs in the power device to be adapted to a new working body.

Abstract: A method and transmitter for determining voltage standing wave ratios, VSWR, of an antenna array having multiple subarrays, each subarray having two branches. According to one aspect, a method includes grouping the branches of the 5 antenna array to form a number of groups, each group being formed so that nearest branches in group are separated by at least one branch not in the group. For each group, the method includes combining reflected signals from the branches of the group to produce a first signal YREFL and combining forward signals from the 10 branches of the group to produce a second signal YFWD; calculating a reflected power PREFL and a forward power PFWD and calculating a VSWR for the group based on the reflected power PREFL and the forward power PFWD.

Abstract: A power device for an electric tool and system is provided that can power tool bodies of different electric tools. The power device includes a power control unit that receives a control instruction transmitted by the tool control unit and controls the motor according to control instructions. The power device not only improves the utilization rate of general modules, such as a motor and a battery pack, but also improves the expandability of the system, reduces the amount of programs in the power device, and eliminates the need to update the programs in the power device to be adapted to a new working body.

Abstract: A packet classification method includes building a decision tree with a preset building method for a packet, extracting packet header bits indicated by the bitmask of current node and concatenating the bits to generate a child index, traversing the child nodes recursively according to the child index until the leaf node is reached, obtaining in the reached leaf node a list of rule pointers referring to rules, and matching each of the rules so as to classify the packet. The method improves upon the current trade-off, and achieves faster classification speed while retaining reasonable memory consumption. A device for packet classification can implement the method.