Abstract: A full-hydraulic chain reversing and remote control water-power harvesting equipment for lotus roots includes a main framework, a traveling module, an elevating module, and a working module. The main framework is of a two-crossbeam structure; the working module is of a skid-mounted structure; the working module is in transmission connection with the traveling module through the elevating module and is fixedly mounted on a top surface of the main framework; the traveling module includes caterpillar bands and a two-hydraulic-motor group; the two-hydraulic-motor group is in transmission connection with the caterpillar bands; the caterpillar bands and the two-hydraulic-motor group are fixedly mounted on a bottom cross beam of the main framework; and the working module includes a power driving module, a jet working module, a water suction pipeline module and a hydraulic power module.

Abstract: An autofocus projection apparatus having focal-length fine adjustment is disclosed. A projection light engine including the same is also disclosed. The autofocus projection apparatus comprises a projection lens system, which comprises a first lens group, a second lens group, an aperture stop, a third lens group and a forth lens group arranged from a long conjugate side to a short conjugate side; a stepper motor, a control board, and a time-of-flight (TOF) distance measurement module; wherein the stepper motor is connected to an inner barrel for enclosing the second group lens through an adjustment level and only moves the second lens group for autofocus adjustment based on projection distances measured by the TOF distance measurement module. A 3D TOF module which includes a modulated flash light emitter and a CMOS camera sensor, can be used for automatic keystone correction as well as autofocus distance detection in the projection light engine.

Abstract: An autofocus projection apparatus having focal-length fine adjustment is disclosed. A projection light engine including the same is also disclosed. The autofocus projection apparatus comprises a projection lens system, which comprises a first lens group, a second lens group, an aperture stop, a third lens group and a forth lens group arranged from a long conjugate side to a short conjugate side; a stepper motor, a control board, and a time-of-flight (TOF) distance measurement module; wherein the stepper motor is connected to an inner barrel for enclosing the second group lens through an adjustment level and only moves the second lens group for autofocus adjustment based on projection distances measured by the TOF distance measurement module. A 3D TOF module which includes a modulated flash light emitter and a CMOS camera sensor, can be used for automatic keystone correction as well as autofocus distance detection in the projection light engine.

Abstract: A composite lithium compound having a mixed crystalline structure is provided. Such compound can be formed by heating lithium, iron, phosphorous and carbon sources with a lithium metal compound. The resulting mixed metal crystal can exhibit superior electrical property and is a better cathode material for lithium secondary batteries.

Abstract: A composite lithium compound having a mixed crystalline structure is provided. Such compound can be formed by heating lithium, iron, phosphorous and carbon sources with a lithium metal compound. The resulting mixed metal crystal can exhibit superior electrical property and is a better cathode material for lithium secondary batteries.

Abstract: A composite lithium compound having a mixed crystalline structure is provided. Such compound can be formed by heating lithium, iron, phosphorous and carbon sources with a lithium metal compound. The resulting mixed metal crystal can exhibit superior electrical property and is a better cathode material for lithium secondary batteries.

Abstract: A composite lithium compound having a mixed crystalline structure is provided. Such compound can be formed by heating lithium, iron, phosphorous and carbon sources with a lithium metal compound. The resulting mixed metal crystal can exhibit superior electrical property and is a better cathode material for lithium secondary batteries.