Abstract: Disclosed are a dual-motor multi-gear hybrid transmission system and a vehicle. The dual-motor multi-gear hybrid transmission system includes an engine, a first motor, a second motor, a first clutch, a second clutch, a first planet row, a second planet row, a first input shaft, a second input shaft, a third input shaft and a brake assembly. The first input shaft is connected to the engine through the first clutch. The second input shaft is connected to the engine through the second clutch, and the second input shaft is sleeved outside the first input shaft. The first motor is connected to the engine. The second motor is connected to the first planet row through the third input shaft. The brake assembly is configured to brake the first planet row and/or the second planet row.

Abstract: A reasonable millisecond time control method for excavation blasting of a tunnel is provided, and includes: acquiring physical mechanical parameters to establish a millisecond blasting model, and designing four dimensions blasting parameters of explosive quantity, hole number, inter-hole millisecond and inter-row millisecond; simulating, based on the millisecond blasting model, a blasting process of an explosive package using blasting parameters to obtain a blasting vibration curve; obtaining single-hole blasting vibration waveforms, solving a vibration synthesis curve through a vibration synthesis theory; comparing the vibration synthesis curve with the blasting vibration curve to obtain a coupling relationship of blasting parameters; determining a target group of explosive quantity and hole numbers, determining a target millisecond through the coupling relationship of blasting parameters, and relating a millisecond blasting control strategy to control, and it is used for tunneling project to reduce cut blas

Abstract: An earpiece includes a housing, a sound transmission component, a sound reception component, a force application structure and a trigger. A cavity is formed in the housing. The sound transmission component is provided in the cavity. The sound reception component is provided on the housing, and can move along a predetermined path. At least a retracted position and a stretched position are arranged on the predetermined path. The force application structure is connected to the sound reception component, and configured to drive the sound reception component to move to the retracted position or the stretched position. The earpiece in the present disclosure stretches out or retracts the sound reception component automatically. The earpiece in the present disclosure does not need the user to stretch out or retract the sound reception component manually, with good user experience.

Abstract: The present invention provides a handheld sweeping and mopping structure, comprising a handle and a body shell, wherein a sweeping and mopping module, a water tank module, a driving module, a garbage collection module, a control module and a power supply module are provided inside the body shell. The handheld sweeping and mopping structure of the present invention can sweep the floor and also mop the floor, has higher efficiency and better effect than the conventional sweeping and mopping mode; and meanwhile, a disposable garbage box which is convenient to replace is used, and it is unnecessary to clean the garbage box repeatedly.

Abstract: The present invention provides a handheld sweeping and mopping structure, comprising a handle and a body shell, wherein a sweeping and mopping module, a water tank module, a driving module, a garbage collection module, a control module and a power supply module are provided inside the body shell. The handheld sweeping and mopping structure of the present invention can sweep the floor and also mop the floor, has higher efficiency and better effect than the conventional sweeping and mopping mode; and meanwhile, a disposable garbage box which is convenient to replace is used, and it is unnecessary to clean the garbage box repeatedly.

Abstract: An input device has four control points corresponding to four fingers of a human hand. The first three control points provide means to traverse a ternary tree. Each node of the ternary tree contains a set of 27 related characters. The fourth control point provides means to enter the chosen node, and the input device uses the corresponding character set. The character set is divided into three subgroups, and the user can use one of the first three control points to choose one group. The divide-and-choose process continues until the desired character is unambiguously chosen. Then the process starts again from the complete 27 characters. The fourth control point provides means to switch among character sets and escape into the ternary tree navigation mode. Furthermore, each control point is associated with a musical note.