Abstract: The present disclosure provides a multi-system water heater module and a heat pump system, which belong to the field of water heaters. The multi-system water heater module includes a box body and at least two independently operating water circuit systems arranged in the box body, wherein one of the water circuit systems is connected to a first end device, and the other water circuit system is connected to a second end device, wherein the first end device and the second end device are different. The above multi-system water heater module can accommodate multiple water circuit systems, and each water circuit system is connected to a different end device, so as to integrate multiple water circuit systems, which meets the needs of multiple usage and mounting scenarios, and also improves the mounting and maintenance efficiency, so as to save the mounting cost.

Abstract: Provided are a hot water machine housing and a hot water machine. The hot water machine housing includes a top cover, a bottom plate, and a sidewall panel. An upper edge of the sidewall panel is provided with a first overlapping edge and a first assembly edge. The first overlapping edge extends approximately in a horizontal direction toward an interior cavity of the hot water machine housing, and the first assembly edge is angled relative to the first overlapping edge. The edge of the top cover is provided with a second overlapping edge and a second assembly edge. The second overlapping edge extends approximately in the horizontal direction toward the interior cavity, and the second assembly edge is angled relative to the second overlapping edge. The second overlapping edge overlaps with the first overlapping edge, and the second assembly edge is opposite and connected to the first assembly edge.

Abstract: A heat pump water module and a heat pump apparatus are provided, relating to the field of heat pumps. The heat pump water module includes a tank and at least one water passage system provided in the tank, wherein the water passage system includes a cold-water pipeline and a hot-water pipeline, wherein the hot-water pipeline includes a hot-water inlet pipeline, an electric heater and a hot-water outlet pipeline that are detachably and fixedly connected, without pipeline blocking in front of connection parts of two ends of the electric heater. For the heat pump water module, the electric heater is provided to play a role of auxiliary heating, so as to quickly heat water to a required temperature and better satisfy customer's demand.

Abstract: The present disclosure provides a heat pump water module and a heat pump device, and relates to the technical field of heat pumps. The heat pump water module includes a box and at least one waterway system arranged in the box, the waterway system includes a cold water pipeline and a hot water pipeline; the cold water pipeline includes a cold water inlet pipeline, a water pump assembly and a cold water outlet pipeline which are detachably fixedly connected, and there is no pipeline shielding in front of the connection parts at both ends of the water pump assembly.

Abstract: The present disclosure provides an automatic separation apparatus for four fractions of heavy oil and a separation method thereof, wherein the apparatus includes a solvent reservoir tank (1), a separation unit for four fractions of heavy oil (100) and a receiving apparatus (9). The separation unit for four fractions of heavy oil (100) includes: a filter disc (4) having one end in communication with the solvent reservoir tank (1), and the other end in communication with an inlet of a pre-column flow path switching valve (5); a chromatographic column (6) having an inlet in communication with an outlet of the pre-column flow path switching valve (5), and an outlet in communication with an inlet of a post-column flow path switching valve (8). The receiving apparatus is in communication with an outlet of the post-column flow path switching valve (8).

Abstract: An on-chip dual-mode transmission line with an spoof surface plasmon based on a balun includes a dual-mode transmission line located in the intermediate, the balun structures symmetrically located at both terminals of the dual-mode transmission line, and pad structures and excitation portions located outside the balun structures. The dual-mode transmission line comprises two metal strip lines that are the same in structure and parallel to each other, and the branches located between the two metal strip lines. The dual-mode transmission line can simultaneously support the transmissions of the odd-mode spoof surface plasmon signal and the even-mode spoof surface plasmon signal, and is not only suitable for III-V chips such as gallium arsenide and silicon nitride, but also suitable for technologies such as other chips and printed circuit boards.

Abstract: A control method for a stepping motor of a thermal printer of the present application includes the following steps: in a starting stage of the thermal printer, transmitting a square wave control signal to the stepping motor; in a starting process, using the square wave control signal and switching to square wave control with Pulse Width Modulation (PWM) for outputting in a case of accelerating to the maximum set speed according to an accelerometer; in a normal printing process, according to changes in a printing rate, adaptively dynamically adjusting a printing speed. In a motor deceleration process, the duty cycle of the motor inner-loop PWM control is unchanged. The square wave control and the square wave with the PWM are used for switching control or combining control according to different stages of work.

Abstract: The present application relates to the technical field of the treatment of heavy metal pollution, and in particular, to a method for predicting heavy metal accumulation in soil based on an emission inventory and a receptor model. Atmospheric dust fall, irrigation water, a fertilizer, and a pesticide are used as heavy metal input flux sources of farmland soil, and surface runoff and a crop are used as output fluxes. A heavy metal pollutant input-output flux inventory is established to specify a dynamic equilibrium relationship of heavy metal accumulation in soil, and soil samples are collected and monitored continuously, which provides important help for determining a migration equilibrium of heavy metals in a farmland region affected by a nonferrous metal dressing and smelting slag yard and a source of soil heavy metal pollution, thereby providing theoretical guidance for subsequent prevention and accurate control of heavy metals in soil.

Abstract: Disclosed in the present invention is a method for synthesizing high-purity plant-derived cholesterol. By taking plant-derived 21-hydroxy-20-methylpregn-4-en-3-one, also called bisnoralcohol or BA, as a raw material, cholesterol is synthesized by means of steps such as oxidation, Wittig reaction, acetylation, reduction and selective hydrogenation reduction, or the cholesterol is synthesized by means of steps such as oxidation, Wittig reaction, acetylation, reduction, hydroxyl protection, selective hydrogenation reduction, deprotection or hydrolysis, and the purity can reach 99% or above.

Abstract: Disclosed in the present invention is a synthesis method for high-purity cholesterol. The cholesterol is synthesized by using plant-derived 21-hydroxy-20-methylpregn-4-en-3-one, which is also referred to as bisnoralcohol or BA, as a raw material, and by means of steps of oxidation, Wittig reaction, acetylation, reduction, hydroxyl protection, selective hydrogenation reduction, and deprotection or hydrolysis reaction, and the purity can reach 99% or above. Aiming at defects of conventional animal-derived cholesterol, in the present invention, the cholesterol is synthesized from plant-derived raw material BA; thus, high safety is achieved, the risk of pathogenic bacteria and virus infection is avoided, high synthesis yield, high product purity, and environmental friendliness are achieved, and industrial production is facilitated.

Abstract: An electrochemical device, including a first housing, a second housing, and a first separation piece. The first separation piece is disposed between the first housing and the second housing. A first cavity and a second cavity are disposed on two sides of the first separation piece of the electrochemical device respectively. The first separation piece includes a first substrate layer and a first sealing material layer located on a surface of the first substrate layer. The electrochemical device satisfies: 1.2?Fs11/F11?15, where F11 is a peel force between the first sealing material layer and the first substrate layer, and Fs11 is a peel force between the first housing and the first sealing material layer. This arrangement can reduce the risk of bursting the seal interface when the electrochemical device is impacted such as dropped, thereby improving the safety and reliability of the electrochemical device.

Abstract: A battery cell includes an electrode assembly, where the electrode assembly is configured as a wound structure; and an accommodating component, where an installation space for accommodating the electrode assembly is provided in the accommodating component; where the electrode assembly includes a positive electrode plate and a negative electrode plate. The negative electrode plate includes a negative electrode terminating section. The negative electrode terminating section is disposed at an outermost circle of the electrode assembly, an insulating layer is provided on an outer side surface of the negative electrode terminating section, and the insulating layer is adhesively fixed to the accommodating component.

Abstract: An electrode assembly of a battery cell includes a first electrode plate and a first tab. The first tab is electrically connected to the first electrode plate. The first tab is located in a straight region. The first tab at least partially protrudes from a surface of the first electrode plate in a second direction. The first electrode plate includes a first winding terminating section located in the straight region and a first bending section located in a bending region. One end of the first winding terminating section is connected to the first bending section, and another end of the first winding terminating section is a first winding terminating end of the first electrode plate. When viewed in the second direction, the first tab and the first winding terminating section do not overlap.

Abstract: An electrode assembly of a battery cell includes a flat region and a first bent region connected in a first direction; a positive electrode plate includes a positive electrode winding starting section and first flat section located in the flat region; and a negative electrode plate includes a negative electrode winding starting section. The negative electrode winding starting section is located in the flat region, and in a second direction, the negative electrode winding starting section is located between the positive electrode winding starting section and the first flat section. The first separator has a first winding starting end, where the first winding starting end is flush with a positive electrode winding starting end, or the first winding starting end is flush with a negative electrode winding starting end.

Abstract: A control method for a stepping motor of a thermal printer of the present application includes the following steps: in a starting stage of the thermal printer, transmitting a square wave control signal to the stepping motor; in a starting process, using the square wave control signal and switching to square wave control with Pulse Width Modulation (PWM) for outputting in a case of accelerating to the maximum set speed according to an accelerometer; in a normal printing process, according to changes in a printing rate, adaptively dynamically adjusting a printing speed. In a motor deceleration process, the duty cycle of the motor inner-loop PWM control is unchanged. The square wave control and the square wave with the PWM are used for switching control or combining control according to different stages of work.

Abstract: An electrochemical apparatus, including: a first electrode assembly including a first negative electrode plate having a first negative current collector with a first negative active material layer disposed on at least one surface; and a second electrode assembly including a second negative electrode plate having a second negative current collector with a second negative active material layer disposed on at least one surface. A coating weight W1f of the first negative active material layer and a coating weight W2f of the second negative active material layer satisfy: 30 mg/1540.25 mm2?W2f?W1f?100 mg/1540.25 mm2. By regulating a value of W2f?W1f to be within the above range, energy density of the electrochemical apparatus and swelling performance of the electrochemical apparatus can be improved while fast charging performance is satisfied.

Abstract: An on-chip dual-mode transmission line with an spoof surface plasmon based on a balun includes a dual-mode transmission line located in the intermediate, the balun structures symmetrically located at both terminals of the dual-mode transmission line, and pad structures and excitation portions located outside the balun structures. The dual-mode transmission line comprises two metal strip lines that are the same in structure and parallel to each other, and the branches located between the two metal strip lines. The dual-mode transmission line can simultaneously support the transmissions of the odd-mode spoof surface plasmon signal and the even-mode spoof surface plasmon signal, and is not only suitable for III-V chips such as gallium arsenide and silicon nitride, but also suitable for technologies such as other chips and printed circuit boards.

Abstract: Embodiments of the present disclosure relate to a coprocessor, a host processor, a crash detection method and an electronic device. In this method, the coprocessor sends a handshake request to the host processor capable of running an operating system. The host processor performs an operation triggered by the handshake request. The host processor sends a positive response to the handshake request to the coprocessor if the operation is performed successfully; and the host processor sends, to the coprocessor, a negative response to the handshake request or no response if the operation is performed successfully. The coprocessor monitors a response to the handshake request from the host processor and determines a detection result of hardware crash associated with the operating system at least based on a monitoring result of this response.

Abstract: This application provides a housing, an arc battery, and an electric device. The housing includes two cover plates and a middle frame, where the two cover plates are both arc shaped plates, the middle frame has two opposite openings in a first direction, and the two cover plates are configured to respectively cover the two openings, and the middle frame and the two cover plates jointly define an accommodating space. The two cover plates of the housing are both arc plates, and therefore the housing can be used for arc batteries. The housing is divided into two are cover plates and a middle frame that are separately disposed.

Abstract: A secondary battery includes an electrode assembly, a housing, and an adhesion layer. The housing includes an upper housing body and a lower housing body. The lower housing body is provided with a recess for accommodating the electrode assembly. The upper housing body is configured to cover the recess. The adhesion layer is provided on a bottom surface of the recess opposite to the upper housing body. The housing is a metal housing. The adhesion layer adheres the electrode assembly to the housing.