Abstract: The present invention relates an elevating apparatus based on a hetero-oriented non-isometric, dual-spiral drive structure, comprising a first carrier and a second carrier, further comprising a first support and a second support that are telescoped together in a manner that they can rotate with respect to each other, the first support is provided with a first recessed portion and a first raised portion that shares the same spiral direction and spiral pitch, the second support is provided with a homo-oriented, isometric, dual-spiral second recessed portion that has a spiral direction different from that of the first recessed portion. The carrier of the present invention is provided in a simply-supported-beam, and the carrier force can be achieved without additional weight, and the operation is stable and reliable.

Abstract: Disclosed are a small-molecule electron donor material with an electron-deficient heterocyclic core, preparation and application thereof, belonging to technical field of solar cells. According to the present application, a brand-new electron-deficient heterocyclic unit which has never been applied to an organic solar cell is used as a core unit to prepare a small-molecule electron donor material with an A-D-A?-D-A skeleton structure, and the molecular structure of the small-molecule electron donor material is shown in formula (I).

Abstract: A method and system for positioning an indoor autonomous mobile robot is disclosed in this application, which includes: indoor layout of moving paths and indoor relative position information of the moving path are obtained by a vision sensor; visual positioning is performed by a visual locator on indoor image data collected by the visual sensor to obtain the first position information; and second position information of a UWB location tag is obtained and solved by an UWB locator; the first position information and the second position information are fused by an adaptive Kalman filter, to obtain final positioning information of the autonomous mobile robot. After fusion, the UWB locator can correct the accumulated error caused by visual positioning, and at the same time, visual positioning can smooth measured data of the UWB locator to make up for deficiencies.

Abstract: A method for human action recognition in a human-machine interactive assembly scene is disclosed in this application, joint coordinate streams of skeleton joints are obtained under a human action from motion sensing devices; a starting position and an ending position of the action are positioned according to data change based on a threshold value to obtain information of joints; resampling of angle change is made on the information of joints to obtain coordinates of joints; the coordinates of joints are normalized, to obtain a sequence of skeletons forming an action; obtaining a vector direction of the upper limb, and the scene is classified to be a left-hand scene or a right-hand scene; training is made for human action recognition in the left-hand scene and the right-hand scene respectively; human action outputs of the left-hand scene and the right-hand scene are fused to realize action recognition in a human-machine interaction scene.

Abstract: An activated carbon/palladium-gallium (Pd—Ga) liquid alloy composite catalyst, including a support and an active component supported on the support. The support is acid washed activated carbon. The active component is Pd—Ga liquid alloy. In the present invention, the active component Pd—Ga, present in the form of liquid alloy, forms a self-protective oxide layer. This protects acetylene from secondary reactions on the surface of the catalyst, inhibits or reduces acetylene to deeply hydrogenate to form ethane, thereby increasing ethylene selectivity. The present invention further provides a preparation method of the catalyst, where the catalyst of the present invention is prepared by immersion. The preparation method is simple and easy to operate. When the activated carbon/Pd—Ga liquid alloy composite catalyst provided by the present invention is used for acetylene hydrogenation to prepare ethylene, conversion rate of acetylene is as high as 99.8%, while the ethylene selectivity is as high as 98.9%.

Abstract: A process for preparing a catalyst for selective hydrogenation of acetylene to ethylene, comprises: mixing palladium, gallium, and gold sources, silica, and a solvent to form a suspension, which is then subjected to filtration and drying so as to obtain a catalyst precursor; subjecting the catalyst precursor obtained to a calcination treatment; and subjecting a calcinated product obtained to a reduction reaction in a reducing atmosphere so as to obtain the catalyst. The catalyst prepared according to this process exhibits a high stability and high catalytic performance, and has a large number of active sites uniformly distributed.

Abstract: The present invention relates to a method for efficiently regenerating waste lubricating oil and belongs to the technical field of waste lubricating oil recovery and treatment. The method for efficiently regenerating waste lubricating oil is provided to solve a problem that existing waste lubricating oil has a high metal ion content. The method includes: adding the waste lubricating oil into a reaction vessel, performing a stirring treatment under the action of a cuprous-containing catalyst to form an aggregate, and then performing filtration and separation to directly remove the aggregate, to obtain corresponding regenerated lubricating oil. The present invention can effectively realize separation and removal of a metal ion, directly filter and separate, avoid emulsification, and obtain high quality lubricating oil having a low total metal ion content.