Abstract: An artificial intelligence based chatbot development system discloses a method including receiving from a user a configuration file including chatbot framework information for configuring a framework for a chatbot for a team of end users, the user configuration file including at least one of a name of a team, one or more document sites related to the team, one or more incident identifications searched by the team, determining a plurality of data sources relevant to the team based on the chatbot framework information, downloading a plurality of document chunks from the data sources relevant to the team, processing the plurality of document chunks to generate metadata tags related to the document chunks, vectorizing the metadata tags to generate metadata embeddings for the plurality of document chunks, and in response to receiving a user query, using the metadata embeddings to select a collection of the document chunks that are passed to a language model (LM) with the user query.

Abstract: The disclosure relates to the technical field of laundry apparatus manufacturing, and discloses a space textile cleaning equipment and a cleaning method, comprising a washing unit consisting of: a housing, in which a fixing plate for paving the fabric and a fixing clip for clamping and fixing the paved fabric are arranged; and a scraper corresponding to the fabric, which can move along the length direction or the width direction of the fixing plate, and is also provided with an atomizing nozzle for spraying detergent, with the outlet of the atomizing nozzle corresponds to the fabric.

Abstract: An energy storage system and a self-heating method therefor are provided. By means of the self-heating method for an energy storage system, when a battery temperature of the energy storage system is lower than a preset permissible operation temperature, an electric energy conversion apparatus is controlled to operate in a reactive operation mode. Since a cooling liquid of the energy storage system can heat conduction with the electric energy conversion apparatus and a battery pack, the battery pack is heated by means of the flow of the cooling liquid; and after the battery temperature reaches the preset permissible operation temperature, the electric energy conversion apparatus can be controlled to operate in a normal operation mode.

Abstract: This application provides a centrifugal compressor and a refrigeration heat pump unit, the centrifugal compressor includes a first compression chamber including a first inlet portion that includes a first variable guide vane, and a first outlet portion. A second compression chamber including a second inlet portion that includes a second variable guide vane, and a second outlet portion. A first impeller rotatably disposed inside the first compression chamber and disposed adjacent to the first variable guide vane. A second impeller rotatably disposed inside the second compression chamber and disposed adjacent to the second variable guide vane. A third impeller rotatably disposed inside the first compression chamber and located downstream of the first impeller. A first bypass pipe allowing a discharge flow passage of the third impeller to communicate with an inlet of the third impeller.

Abstract: This application provides a refrigeration heat pump unit, including a refrigerant circuit formed by a centrifugal compressor, a condenser, a throttling device, and an evaporator. The centrifugal compressor includes a housing, a first motor, a second motor, a first compression chamber, a second compression chamber, a first impeller, a second impeller, and a controller. The controller is configured to turn on the first motor and turn off the second motor in response to a first working condition, turn off the first motor and turn on the second motor in response to a second working condition, and turn on the first motor and the second motor in response to a third working condition.

Abstract: The present application provides a water source heat pump system including a first unit and a second unit. The first unit includes a first compressor, a first condenser and a first evaporator. The second unit includes a second compressor, a second condenser and a second evaporator. The first compressor, the first condenser and the first evaporator are in communication with each other to form a first refrigerant circuit, and the second compressor, the second condenser and the second evaporator are in communication with each other to form a second refrigerant circuit. A fluid pipeline in the first condenser and a fluid pipeline in the second condenser are connected in series to allow a heating fluid to pass through the second condenser and the first condenser in sequence. A fluid pipeline in the first evaporator and a fluid pipeline in the second evaporator are connected in series to allow a heat source fluid to pass through the first evaporator and the second evaporator in sequence.

Abstract: The present invention relates to triterpene glycoside saponin-derived adjuvants, syntheses thereof, intermediates thereto, and uses thereof. QS-7 is a potent immuno-adjuvant that is significantly less toxic than QS-21, a related saponin that is currently the favored adjuvant in anticancer and antiviral vaccines. Tedious isolation and purification protocols have hindered the clinical development of QS-7. A novel semi-synthetic method is provided wherein a hydrolyzed prosapogenin mixture is used to synthesize QS-7, QS-21, and related analogs, greatly facilitating access to QS-7 and QS-21 analogs for preclinical and clinical evaluation.

Abstract: A method and a device for locating a fault are provided. The method is applied to an energy storage system, which includes a first battery module, a second battery module, a sensor, and a PCS. A first branch where the first battery module is arranged and a second branch where the second battery module is arranged are connected in parallel and are electrically connected to the sensor. The PCS is electrically connected to the first and the second battery modules. The method includes: switching the first and second branches to a target state and acquiring a second signal sensed by the sensor in the target state, in response to a first signal sensed by the sensor meeting a first preset condition; locating the fault according to the first signal and the second signal; and disconnecting a branch where the fault is located.

Abstract: A method and a device for detecting arcing in an energy storage system, and an energy storage system are provided. The method includes: detecting an arcing feature in current of varying frequencies through a direct current bus of a power conversion system (PCS) unit, where the PCS unit is arranged in a PCS in the energy storage system; detecting a sudden change in port voltage of the PCS unit, in response to success in detecting the arcing feature; and determining that an electric arc occurs in a circuit where the PCS unit is arranged, in response to success in detecting the sudden change.

Abstract: A winding method for radial magnetic bearing stator, a radial magnetic bearing stator and a radial magnetic bearing. The winding method for radial magnetic bearing stator includes: S110, sleeving a first formed stator winding on a first stator tooth of a stator core along a radial outward direction; S120, sleeving a second formed stator winding on a second stator tooth of the stator core along a radial outward direction; S130, a first coil of the first formed stator winding is connected in series with a second coil of the second formed stator winding; the first stator tooth is adjacent to the second stator tooth, and a stator slot is formed therebetween; and the coil number of the first formed stator winding is larger than that of the second formed stator winding.

Abstract: An energy storage converter and an energy storage system are provide. The energy storage converter includes: a DC switching power supply circuit configured to provide a first power supply using DC power from the DC side port; an AC switching power supply circuit configured to provide a second power supply using AC power from the AC side port; a power supply circuit configured to supply power to the energy storage converter using the first power supply or the second power supply; and a control circuit configured to, based on an operation state of the energy storage converter, control the DC switching power supply circuit or the AC switching power supply circuit to provide the power supply circuit with power supply. A power supply mode is selected based on an operation state of the energy storage converter. The DC/AC switching power supply circuit independently supplies power at the same time.

Abstract: A fault detection method and a fault protection method for a power conversion system, and a power conversion system are provided, which relate to the technical field of fault detection for circuits. The fault detection method includes: controlling, when the power conversion system operates in a reactive mode, an alternating current pre-charge power supply to operate to charge a bus capacitor of the power conversion system, where the bus capacitor supplies power to a digital signal processor (DSP) through a first switch power supply (SPS), determining whether the DSP is energized to obtain a first determination result, and determining that the bus capacitor is short-circuited if the first determination result indicates that the DSP is de-energized. According to the present disclosure, when the bus capacitor of the power conversion system is short-circuited, the short-circuit fault of the bus capacitor can be detected.

Abstract: A vapor compression system and method for operating the vapor compression system are provided. The vapor compression system includes a first compressor, a second compressor, a condenser, and at least one check valve disposed between the first compressor and the condenser. The method provides for the transmitting of a shutdown command to at least one of the first compressor and the second compressor, at least one of the first compressor and the second compressor including a rotating shaft and a magnetic bearing, the magnetic bearing having an active mode and an inactive mode, the magnetic bearing levitating the rotating shaft in the active mode. The method further provides for the monitoring of at least one of a rotational speed of the rotating shaft and a differential pressure over the check valve for a preset time, wherein the magnetic bearing remains in the active mode at least during the preset time.

Abstract: A deflector for a condenser, the condenser has an inlet communicated with exhaust pipes of a compressor, and the deflector is provided at the inlet, the deflector includes: a flow guiding structure having a first tube section and a second tube section of increasing diameter, the second tube section being positioned below the first tube section and extending into the condenser when mounted in place; and a support assembly for fixing the flow guiding structure at the inlet, at least a part of the refrigerant gas flow flows through the interior of the first tube section, and at least another part of the refrigerant gas flow flows through the outer side of the first tube section.

Abstract: The present invention relates to triterpene glycoside saponin-derived adjuvants, syntheses thereof, intermediates thereto, and uses thereof. QS-7 is a potent immuno-adjuvant that is significantly less toxic than QS-21, a related saponin that is currently the favored adjuvant in anticancer and antiviral vaccines. Tedious isolation and purification protocols have hindered the clinical development of QS-7. A novel semi-synthetic method is provided wherein a hydrolyzed prosapogenin mixture is used to synthesize QS-7, QS-21, and related analogs, greatly facilitating access to QS-7 and QS-21 analogs for preclinical and clinical evaluation.

Abstract: A deflector for a condenser. The condenser has an inlet in communication with a compressor, and a deflector for guiding a refrigerant gas flow from the compressor is arranged in the condenser and at a position close to the inlet. The deflector is provided with a deflecting structure projecting toward the inlet, and the deflecting structure is configured as impermeable to the refrigerant gas flow.

Abstract: A vapor compression system and method for operating the vapor compression system are provided. The vapor compression system includes a first compressor, a second compressor, a condenser, and at least one check valve disposed between the first compressor and the condenser. The method provides for the transmitting of a shutdown command to at least one of the first compressor and the second compressor, at least one of the first compressor and the second compressor including a rotating shaft and a magnetic bearing, the magnetic bearing having an active mode and an inactive mode, the magnetic bearing levitating the rotating shaft in the active mode. The method further provides for the monitoring of at least one of a rotational speed of the rotating shaft and a differential pressure over the check valve for a preset time, wherein the magnetic bearing remains in the active mode at least during the preset time.

Abstract: The present invention discloses a rose petal effect-based biomimetic electrode and a membrane-less water electrolysis reactor utilizing the same, belongs to the technical field of catalytic technology for water electrolysis. The electrode has a surface exhibiting a microscopically alternating hydrophilic-hydrophobic periodic structure. The hydrophilic parts ensure good contact between the catalyst and the electrolyte solution, thereby guaranteeing the electrode's catalytic performance. The hydrophobic parts allow the gas generated at the electrode surface to be discharged through internal porous channels, preventing the formation of visible bubbles on the electrode surface and thereby fundamentally avoiding issues caused by bubble formation. The membrane-less water electrolysis reactor utilizing the electrode can eliminate bubble formation on the electrode surface, thereby avoiding problems related to bubble covering catalytic sites, bubble resistance, and gas mixing.

Abstract: A locking structure of a compressor impeller, which includes: a rotary shaft; a lock nut arranged on an end of the rotary shaft by means of a threaded connection and provided with waist-shaped holes extending along a circumferential direction thereof; an impeller sleeved on the end of the rotary shaft and located on an inner side of the lock nut, the impeller is provided with threaded holes in communication with the waist-shaped holes of the lock nut; a nose piece located on an outer side of the lock nut and provided with through holes in communication with the waist-shaped holes of the lock nut; and bolts passing through the through holes and the waist-shaped holes in turn into the threaded holes, thereby fixing the nose piece, the lock nut and the impeller together.

Abstract: A centrifugal compressor and a refrigerating device. The centrifugal compressor includes: a shell, which has a fluid inlet and a fluid outlet; a motor assembly including a stator and a rotor, the rotor including a vertically arranged rotor shaft; a centrifugal compression mechanism, an impeller of which is connected with the rotor shaft so as to be driven by the motor assembly, wherein the centrifugal compression mechanism is arranged downstream of the fluid inlet to receive fluid, compress and pressurize the fluid, and output the pressurized fluid in a direction away from the motor assembly; and a guide member, which receives the pressurized fluid from the centrifugal compression mechanism, and which defines a flow passage alone or together with a part of the shell, wherein the flow passage is configured such that the pressurized fluid from the centrifugal compression mechanism passes through and cools the motor assembly.