Abstract: An integrated pressure condensing boiler is provided which relates to the technical field of boilers. The integrated pressure condensing boiler includes a pressure-bearing housing, a heat-exchange furnace arranged in the pressure-bearing housing, a combustion chamber communicating with the heat-exchange furnace and cooling tube groups fixed in the heat-exchange furnace. Heat-exchange medium flows from bottom to top in the pressure-bearing housing and in the cooling tube groups, and exchanges heat with high-temperature flue gas flowing from top to bottom in the heat-exchange furnace, thus achieving a counterflow heat exchanging. The heat-exchange furnace includes a multi-stage heat-exchange chamber with each heat-exchange chamber being cylindrical. The heat-exchange chambers are arranged in sequence from top to bottom to achieve a flue gas diffusing manner that high-temperature flue gas diffuses from center part to periphery and then gathers from periphery to center part.

Abstract: In general, techniques are described for authenticating a parcel consignee. A device including an imaging module, processors, and an output module may implement the techniques. The imaging module images a first indicia of a parcel and a second indicia that is separate from the first parcel to obtain representations of the first and second indicia. The processors process the representations of the first and second indicia to determine a first key specified by the first indicia and a second key specified by the second indicia. The processors also determine whether the second key corresponds with the first key, and authenticate a consignee that provided the second indicia as an authorized recipient of the parcel based on the determination of whether the second key corresponds with the first key. The output module then indicates whether the one or more processors authenticate the consignee as the authorized recipient of the parcel.

Abstract: In general, techniques are described for authenticating a parcel consignee. A device including an imaging module, processors, and an output module may implement the techniques. The imaging module images a first indicia of a parcel and a second indicia that is separate from the first parcel to obtain representations of the first and second indicia. The processors process the representations of the first and second indicia to determine a first key specified by the first indicia and a second key specified by the second indicia. The processors also determine whether the second key corresponds with the first key, and authenticate a consignee that provided the second indicia as an authorized recipient of the parcel based on the determination of whether the second key corresponds with the first key. The output module then indicates whether the one or more processors authenticate the consignee as the authorized recipient of the parcel.