Abstract: The embodiment of the present disclosure provides a cleaning system and a self-cleaning method for a cleaning device. The cleaning system includes a cleaning device and a base station, wherein when docked with the cleaning device, the base station is used to control the cleaning device for self-cleaning and charging a rechargeable battery; a trigger control part, used to activate a self-cleaning mode; and a control module configured to: activate the self-cleaning mode and control a battery charging circuit to fail after receiving a trigger signal; in response to monitoring a first predetermined state, controlling the battery charging circuit to be effective to charge the rechargeable battery; in response to monitoring a second predetermined state, control the battery charging circuit to fail, and continue to execute the self-cleaning mode to clean the cleaning part, then exit the self-cleaning mode until a self-cleaning completion condition is met.

Abstract: The embodiment of the present disclosure provides a cleaning system and a self-cleaning method for a cleaning device. The cleaning system includes a cleaning device and a base station, wherein when docked with the cleaning device, the base station is used to control the cleaning device for self-cleaning and charging a rechargeable battery; a trigger control part, used to activate a self-cleaning mode; and a control module configured to: activate the self-cleaning mode and control a battery charging circuit to fail after receiving a trigger signal; in response to monitoring a first predetermined state, controlling the battery charging circuit to be effective to charge the rechargeable battery; in response to monitoring a second predetermined state, control the battery charging circuit to fail, and continue to execute the self-cleaning mode to clean the cleaning part, then exit the self-cleaning mode until a self-cleaning completion condition is met.

Abstract: Disclosed is a sintered body composition used in improved diffusion efficiency of heavy rare earth elements RH, and related sintered permanent magnet and preparation methods. The sintered body includes Nd2Fe14B crystal phase as a primary phase, and a rare earth rich phase as a grain boundary phase. The sintered body includes a composition expressed by RaBbGacCudAleMfCogFebalance; wherein R is one or more selected from rare earth elements, and R includes Nd; M is one or more selected from the group consisting of Zr, Ti, and Nb; and wherein “a” satisfies 13%?a?15.3%; “b” satisfies 5.4%?b?5.8%; “c” satisfies 0.05%?c?0.25%; “d” satisfies 0.08%?d?0.3%; “e” satisfies 0?e?1.2%; “f” satisfies 0.08%?f?0.2%; and “g” satisfies 0.8%?g?2.5%. Grains in Nd2Fe14B crystal phase have average size L of 4-8 ?m, and the relationship between L and t for grain boundary phases average thickness is: ?=t/L, wherein ? is defined as 0.009???0.012.

Abstract: The present disclosure provides a control method and system for a critical dimension. The control method includes: establishing a first database of a correspondence between an exposure dose of photoresist and a variation value of a critical dimension; obtaining an actual variation value of the critical dimension, and obtaining a first correction amount of the exposure dose based on the actual variation value and the first database; establishing a second database of a correspondence between waiting time between baking and development of the photoresist and the variation value of the critical dimension; presetting standard lag time between the baking and the development, obtaining actual waiting time between the baking and the development of the photoresist, and determining a time difference between the actual waiting time and the standard lag time; obtaining a compensated variation value of the critical dimension based on the time difference and the second database.

Abstract: The present invention provides a samarium-cobalt magnet and a method for preparing the same. The method comprises mixing an alloy powder with a zirconium powder in an amount of 0.1-0.35 wt % of the weight of the alloy powder to form a mixture. The alloy powder is formed from 10.5-13.5 wt % of samarium, 12.5-15.5 wt % gadolinium, 50-55 wt % of cobalt, 13-17 wt % of iron, 4-10 wt % of copper, and 2-7 wt % of zirconium. The method brings about at low costs a samarium-cobalt magnet having a positive temperature coefficient of remanence.

Abstract: The invention relates to a process and apparatus for separation of gas mixtures with reduced maintenance costs. The process and the apparatus consist of a feed stream separation stage (1), and a retentate separation stage (2), of which both are membrane separation stages, wherein the first retentate stream (7) is heated to temperature higher than the temperature of the feed stream (5), before it is introduced to the retentate separation stage (2), and the total capacity of the membranes used in the retentate separation stage (2) is higher than the total capacity of the membranes used in the feed stream stage (1).

Abstract: A photomask assembly includes: a first photomask for forming a first patterned structure, the first patterned structure having a first patterned opening which includes a plurality of strip-shaped patterns, a distance between the strip-shaped patterns at the two sides of a boundary between the first region and the second region being greater than a distance between other every two neighboring strip-shaped patterns when the center of the first photomask coincides with the center of the substrate; and a second photomask for forming a second patterned region which covers a first patterned opening of a second region, a distance between an opening edge of the second patterned structure and the neighboring strip-shaped pattern being greater than a first preset distance when the center of the second photomask and the center of the first photomask coincide with the center of the substrate.

Abstract: Disclosed is a sintered body, a sintered permanent magnet and preparation methods. The sintered body comprises Nd2Fe14B crystal phase as a primary phase and a rare earth rich phase as a grain boundary phase and has a composition expressed by composition formula RaBbGacCudAleMfCogFebalance; R is one or more selected from rare earth elements, and R must comprise Nd; M is one or more selected from the group consisting of Zr, Ti, and Nb; a satisfies 13%?a?15.3%; b satisfies 5.4%?b?5.8%; c satisfies 0.05%?c?0.25%; d satisfies 0.08%?d?0.3%; e satisfies 0?e?1.2%; f satisfies 0.08%?f?0.2%; g satisfies 0.8%?g?2.5%; grains in Nd2Fe14B crystal phase have average size L of 4-8 ?m, grain boundary phases have average thickness t with unit of ?m; the relation of t and L is: ?=t/L; and ? is defined as 0.009???0.012. The present disclosure improves diffusion efficiency of heavy rare earth elements RH.

Abstract: The invention relates to a process and apparatus for separation of gas mixtures with reduced maintenance costs. The process and the apparatus consist of a feed stream separation stage (1), and a retentate separation stage (2), of which both are membrance separation stages, wherein the first retentate stream (7) is heated to temperature higher than the temperature of the feed stream (5), before it is introduced to the retentate separation stage (2), and the total capacity of the membranes used in the retentate separation stage (2) is higher than the total capacity of the membranes used in the feed stream stage (1).

Abstract: The present invention provides a samarium-cobalt magnet and a method for preparing the same. The method comprises mixing an alloy powder with a zirconium powder in an amount of 0.1-0.35 wt % of the weight of the alloy powder to form a mixture. The alloy powder is formed from 10.5-13.5 wt % of samarium, 12.5-15.5 wt % gadolinium, 50-55 wt % of cobalt, 13-17 wt % of iron, 4-10 wt % of copper, and 2-7 wt % of zirconium. The method brings about at low costs a samarium-cobalt magnet having a positive temperature coefficient of remanence.

Abstract: A flip-chip solar cell chip includes a bonding transfer substrate; a metal bonding layer; a flip-chip solar cell epitaxial layer that bonds with the bonding transfer substrate with the metal bonding layer; the flip-chip solar cell epitaxial layer and the metal bonding layer are divided into two or more portions; the surface of the flip-chip solar cell epitaxial layer has a front electrode; and the metal bonding layer is connected with the ends of the front electrode to form a series connection of the divided epitaxial layer. Advantageously, the division of the solar cell epitaxial layer into a plurality of completely-separated portions greatly reduces photo currents and power loss of cell chip series resistance while realizing multiplied increase of output voltage, thereby improving photoelectric conversion efficiency. The use of metal bonding layer as the back electrode realizes extremely low resistance loss of the back electrode.

Abstract: A high-concentration solar cell includes an epitaxial layer structure, an upper patterned electrode on the top surface, and a back electrode on the back surface. The upper patterned electrode includes a primary pattern and a secondary pattern, where the primary pattern is composed of a series of small metal isosceles trapezoids around the perimeter of the cell. The narrower base of each metal trapezoid points toward an interior of the cell. A lead soldering pad is located within each metal trapezoid for being soldered to an external conductor for carrying the solar cell current. The secondary pattern consists of thin spaced conductors that connect to the angled sides and base of each trapezoid and spread current across the top surface of the cell. The current along the angled sides of each trapezoid is well-distributed to all the spaced conductors connected to the angled sides to avoid current crowding.

Abstract: A high-concentration solar cell includes an epitaxial layer structure, an upper patterned electrode on the top surface, and a back electrode on the back surface. The upper patterned electrode includes a primary pattern and a secondary pattern, where the primary pattern is composed of a series of small metal isosceles trapezoids around the perimeter of the cell. The narrower base of each metal trapezoid points toward an interior of the cell. A lead soldering pad is located within each metal trapezoid for being soldered to an external conductor for carrying the solar cell current. The secondary pattern consists of thin spaced conductors that connect to the angled sides and base of each trapezoid and spread current across the top surface of the cell. The current along the angled sides of each trapezoid is well-distributed to all the spaced conductors connected to the angled sides to avoid current crowding.

Abstract: A smoking article includes at least one strip of heat conducting material extending from one end of the tobacco rod of a smoking article to the opposite end of the tobacco rod. Preferably, the strip of material is at the interface between the tobacco rod and the cigarette paper and extends substantially from the lighting end of the tobacco column to at or near the attachment of a filter to the tobacco column.