Abstract: A first device is logged in with a first user account. The first device displays an avatar of a second user account in a first user interface of the first device. In response to an interaction instruction triggered on the avatar of the second user account, the first device generates an interaction message according to a first field corresponding to the first user account, an action description field corresponding to the interaction instruction, and a second field corresponding to the second user account. The first device transmits the interaction message to a second device that is logged in with the second user account.

Abstract: A lens is provided. The lens includes a lens tube and a plurality of lens elements received in the lens tube. A respective lens element includes an imaging section for imaging and a mounting section for assembling and arranged outside the imaging section. The plurality of lens elements includes at least one dimming lens element disposed close to an imaging plane, and a respective dimming lens element includes at least one dimming section parallel to an optical axis, wherein a vertical distance between a respective one of the at least one dimming section and the optical axis is smaller than a radius of the imaging section. In addition, a lens module and an electronic device installed with the lens are provided, which can reduce the distance between a screen opening and a frame of the electronic device.

Abstract: Embodiments of the present disclosure provide methods and apparatus for handover management. A method performed by a handover management entity includes receiving a handover request from a network node. The handover request indicates that a first terminal device is to be handed over from a source cell to a target cell. The method further includes obtaining a position of the first terminal device. The method further includes predicting a handover result of the first terminal device by a classifier. The position of the first terminal device is used as an input of the classifier and the classifier is trained for the handover from the source cell to the target cell. The method further includes generating a handover decision based on the predicted handover result. The method further iuncludes sending a handover response comprising the handover decision to the network node.

Abstract: Provided is a ketoreductase mutant and applications thereof. Compared with an amino acid sequence shown in SEQ ID NO: 1, the amino acid sequence of the ketoreductase mutant includes at least one of the following mutation sites: L198P, S96W/I/L/V, M194L or L1526, herein “/” means “or.” The ketoreductase mutant provides high selectivity and high activity with respect to a substrate ketone, and the application of the mutant in a catalytic reduction reaction of a ketone substrate may increase the production efficiency of a chiral alcohol compound corresponding thereto.

Abstract: A camera optical lens includes, from an object side to an image side: a first lens with a positive refractive power; a second lens with a negative refractive power; a third lens; a fourth lens; a fifth lens with a positive refractive power; a sixth lens with a positive refractive power; a seventh lens with a negative refractive power. The camera optical lens satisfies the conditions of -8.00?f2/f?-2.50, 2.50?(R5+R6)/(R5-R6)?30.00 and R8/R7 ?-1.50. The camera optical lens of the present disclosure has excellent optical performances, and meanwhile can meet design requirements of a wide-angle, a large aperture and ultra-thin.

Abstract: The present disclosure relates to the field of optical lenses and provides a camera optical lens. The camera optical lens includes, from an object side to an image side: an aperture; a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a negative refractive power; a sixth lens having a positive refractive power; and a seventh lens having a negative refractive power. The camera optical lens satisfies following conditions: 3.00?v1/v2?4.20; and ?21.00?f2/f1??5.00, where f1 denotes a focal length of the first lens; f2 denotes a focal length of the second lens; v1 denotes an abbe number of the first lens; and v2 denotes an abbe number of the second lens.

Abstract: In a high-efficient clean, high-variable load rate coal-fired power generation system, through the internal thermal source SCR denitration catalytic module coupled with high temperature and low temperature storage tanks, the operating temperature of the internal thermal source SCR denitration catalytic module is controlled in a range of 300° C. to 400° C., ensuring that the SCR catalyst has high activity in full-working conditions. Moreover, the high temperature and low temperature storage tanks are coupled with the high-pressure heater group for steam turbine regenerative system, so that when the coal-fired unit needs to increase load rate, the thermal storage energy is quickly converted into output power. In addition, energy stored in the high temperature and low temperature storage tanks come from both the internal thermal source SCR denitration catalytic module and the thermal storage medium heater within the boiler, the operational flexibility and the boiler efficiency are improved.

Abstract: A solar-aided coal-fired flexible power generation system and an operating method thereof are provided. The system includes a coal-fired thermal power generation system and a high-temperature heat storage system coupled with solar thermal power generation; wherein a heat storage medium heater is arranged in the boiler flue; the flow rates of heat storage medium entering the solar heat collection device and the heat storage medium heater are adjusted by the regulating valve and the pump, eliminating irradiation fluctuation influences and maintaining stable power; a heat storage medium tank is used for peak shaving to reduce steam turbine output under stable boiler combustion; the flow and temperature of the feedwater entering the heat storage medium and feedwater heat exchanger are adjusted to realize rapid load cycling. The present invention can realize solar and coal-fired generation coupling, reduce coal consumption, and greatly improve the flexibility and economy.

Abstract: An amino acid sequence of the transaminase mutant is an amino acid sequence obtained by a mutation of an amino acid sequence is shown in SEQ ID NO: 1. The mutation occurred at least one of the following mutation sites: G17V, L36P, Q40H, G69Y, H70T, L73A, V77G, V77S, V77T, A78I, Y130M, Y130V, Y130T, N132I, N132T, K141S, K142S, K142T, R143P, G144F, G144W, G144Y, E145D, E145S, E145G, K146R, L148A, L148I and the like.

Abstract: The present invention provides a camera optical lens including, from an object side to an image side, a first lens, a second lens, a third lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and a eighth lens. The first, third, fifth and seventh lens have positive refractive power, while the second, fourth, sixth and eighth lens have negative refractive power. The camera optical lens satisfies the following conditions: 0.70?f1/f?1.00; ?20.00?f4/f?3.50; and 2.30?f5/f?4.50; where f denotes a focal length of the camera optical lens, and f1, f4 and f5 respectively denote a focal length of the first lens, the fourth lens and the fifth lens. The camera optical lens in the present disclosure satisfies a design requirement of large aperture, wide angle and ultra-thinness while having good optical functions.

Abstract: The present invention provides a camera optical lens including, from an object side to an image side, a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens, a fourth lens having a positive refractive power, a fifth lens having a negative refractive power, a sixth lens having a negative refractive power, a seventh lens having a positive refractive power and a eighth lens having a negative refractive power. The camera optical lens satisfies the following conditions: 0.65?f1/f?0.85, 2.00?f4/f?5.00, and ?5.50?f5/f??2.50; where f, f1, f4 and f5 respectively denote a focal length of the camera optical lens, the first lens, the fourth lens and the fifth lens. The camera optical lens in the present disclosure has characteristics of large aperture, wide angle and ultra-thinness while having good optical functions.

Abstract: The present disclosure relates to a technical field of optical lenses, and discloses a camera optical lens. The camera optical lens includes seven lenses. An order of the seven lenses is sequentially from an object side to an image side, which is shown as follows: a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a negative refractive power, a fourth lens having a positive refractive power, a fifth lens having a refractive power, a sixth lens having a positive refractive power, and a seventh lens having a negative refractive power. While the camera optical lens has good optical performance, the camera optical lens further meets design requirements of large aperture, wide-angle, and ultra-thinness.

Abstract: A control method for optimizing a solar-to-power efficiency of a solar-aided coal-fired power system under off-design working conditions is provided. Through reading the relevant information of the solar collecting system, the coal-fired power generation system, the environmental conditions, and the working conditions of the solar-aided coal-fired power system, the water flow rate range able to be heated by the solar collecting unit and the solar-coal feedwater flow distribution ratio range are determined; through establishing the relationship between the solar-to-power efficiency and the solar-coal feedwater flow distribution ratio, the solar-coal feedwater flow distribution ratio is regulated, so that a flow rate of water entering the solar collecting system to be heated is controlled, thereby maximizing the solar-to-power efficiency and improving the economy of the solar-aided coal-fired power system.

Abstract: Provided are a transaminase mutant and a method for producing a chiral amine using the same. An amino acid sequence of the transaminase mutant is an amino acid sequence obtained by mutation occurred in an amino acid sequence as shown in SEQ ID NO: 1, and the mutation includes at least one of the following mutation sites: position 3, position 5, position 8, position 25, position 32, position 45, position 56, position 59, position 60, position 84, position 86, position 164, position 176, position 178, position 180, position 187, position 197, position 206, position 207, position 242, position 245, position 319 and position 324.

Abstract: A control method for optimizing generated power of a solar-aided coal-fired power system under off-design working conditions sets maximizing generated power without changing main steam flow rate as a control goal. A solar-coal feedwater flow distribution ratio is adjusted to adjust water flow rate heated by a solar heat collection system, so as to achieve the control goal. Control steps include reading relevant information; calculating the water flow rate range heated by the solar heat collection system, and an applicable solar-coal feedwater flow distribution ratio range; establishing a correspondence between the generated power and the solar-coal feedwater flow distribution ratio within this range; selecting a solar-coal feedwater flow distribution ratio corresponding to the maximum generated power; and adjusting the water flow rate entering the solar heat collection system to an optimized value. The present invention can flexibly control the solar-coal coupling and improve the economy.

Abstract: A method for a platform-based scheduling of a job flow is provided, which relates to the technology field of satellites. Specifically, the method includes: acquiring satellite remote sensing data according to transit time of a satellite and triggering a processing flow of the satellite remote sensing data; determining an execution order of the processing flow of the satellite remote sensing data according to a constraint relationship; and allocating processing resources to the processing flow in a hierarchical scheduling manner according to the execution order, and executing the processing flow with the processing resources. Due to a reasonable determination of the execution order of the processing flow of the satellite remote sensing data and a scheduling of the processing resources in the hierarchical scheduling manner, a reasonable allocation of the processing resources is realized. Thus, A timeliness of the processing of the satellite remote sensing data may be improved.

Abstract: Apparatus and method relating generally to a channelized communication system is disclosed. In such a method, a read signal and a switch control signal are generated by a controller. Received by channelized buffers are data words from multiple channels associated with groups of information and the read signal. The data words are read out from the channelized buffers responsive to the read signal. A switch receives the data words from the channelized buffers responsive to the read signal. A gap is inserted between the groups of information by the switch. One or more control words are selectively inserted in the gap by the switch responsive to the switch control signal. The switch control signal has indexes for selection of the data words and the control words.

Abstract: Embodiments of the present application disclose methods and apparatuses for determining a bounding box of a target object, media, and devices. The method includes: obtaining attribute information of each of a plurality of key points of a target object; and determining a bounding box position of the target object according to the attribute information of each of the plurality of key points of the target object and to a preset neural network. The implementations of the present application can improve the efficiency and accuracy of determining a bounding box of a target object.

Abstract: A control method for optimizing a solar-to-power efficiency of a solar-aided coal-fired power system under off-design working conditions is provided.

Abstract: In a high-efficient clean, high-variable load rate coal-fired power generation system, through the internal thermal source SCR denitration catalytic module coupled with high temperature and low temperature storage tanks, the operating temperature of the internal thermal source SCR denitration catalytic module is controlled in a range of 300° C. to 400° C., ensuring that the SCR catalyst has high activity in full-working conditions. Moreover, the high temperature and low temperature storage tanks are coupled with the high-pressure heater group for steam turbine regenerative system, so that when the coal-fired unit needs to increase load rate, the thermal storage energy is quickly converted into output power. In addition, energy stored in the high temperature and low temperature storage tanks come from both the internal thermal source SCR denitration catalytic module and the thermal storage medium heater within the boiler, the operational flexibility and the boiler efficiency are improved.