Abstract: The invention discloses a centrifugal compressor. The centrifugal compressor comprises: a housing (10), provided with a mounting chamber (11), a thread section (12) being provided on a side wall of the mounting chamber (11); an adjusting piece (20), mounted in the mounting chamber (11), the adjusting piece (20) being provided with threads adapting to the thread section (12); a driving piece (30), mounted in the mounting chamber (11) and configured to drive the adjusting piece (20) to move forwards or backwards along the thread section (12); and an adjustable diffuser (40), fixedly connected to the adjusting piece (20). The invention also discloses a centrifugal water chilling unit having the centrifugal compressor. The centrifugal compressor and the centrifugal water chilling unit can solve the problem that the adjustable diffuser easily inclines and is stuck, thereby greatly improving the reliability of the centrifugal compressor.

Abstract: The invention discloses a centrifugal compressor and a water chilling unit having the same. The centrifugal compressor includes an impeller (2), a diffuser (3), a volute (8) and an exhaust diffuser pipe (9), the diffuser (3) including a pressurization passage, air flowing through the impeller (2) entering an inlet of each pressurization passage, the volute (8) being configured to collect the air pressurized by the diffuser (3), the exhaust diffuser pipe being communicated with the volute, and an extending direction of the exhaust diffuser pipe inclining downwards with respect to a horizontal plane. The extending direction of the exhaust diffuser pipe communicated with the volute inclines downwards with respect to the horizontal plane, so that noise and airflow losses of high-temperature and high-pressure air in the exhaust diffuser pipe expelled from the centrifugal compressor due to bending of the pipe can be reduced, and the noise can be effectively reduced.

Abstract: A regulator assembly, comprising a vaned diffuser, a motor, a driving gear engaged with a driven gear, the driven gear having rectangle-shaped through holes thereon, the rectangle-shaped through holes disposed and extending along an axis of the driven gear, and a regulating mechanism including a regulator, a supporting member, wherein the regulator is sleeved on the supporting member, and wherein the vaned diffuser is fixed on the supporting member, and regulator sliding members fixed to the regulator through the rectangle-shaped through holes of the driven gear, whereby the motor is configured to drive the driving gear to rotate, the driving gear is configured to drive the driven gear to rotate, the driven gear is configured to push the regulator sliding members to move, and the regulator sliding members are configured to drive the regulator to rotate relative to the vaned diffuser, thus driving the regulator to move along its axis.

Abstract: A multi-stage centrifugal compressor and an air conditioning unit are disclosed. The multi-stage centrifugal compressor comprises a power portion and an impeller portion. The power portion comprises a motor (6), a shaft of the motor comprises a first end and a second end. The impeller portion comprises N impellers, wherein N is equal to or more than 2 and less than 10. When N is an even, the number of the impellers on the first end of the shaft is equal to that of the impellers on the second end of the shaft. When N is an odd, the number of the impellers on the first end of the shaft is one more than that of the impellers on the second end of the shaft. The first stage impeller farthest away from the motor (6) is arranged at the first end of the shaft; other impellers at the first end of the shaft are arranged in an ascending order. The Nth stage impeller nearest to the motor (6) is arranged at the second end of the shaft; other impellers at the second end of the shaft are arranged in a descending order.

Abstract: Embodiments of the present disclosure provide an Ethernet ring protection switching method, network device and system. In the embodiments of the present disclosure, a node obtains bandwidth information of a first link on an Ethernet ring on which the node is located, and determines that bandwidth of the first link changes, where there is at least one Ethernet ring protection instance on the Ethernet ring, and then the node determines ports of the node, where the at least one Ethernet ring protection instance passes through the ports, so that the node can query pre-configured correspondence between bandwidth information and switching information of each link on the Ethernet ring, and execute, through the ports of the node, a switching operation corresponding to the bandwidth information of the first link.

Abstract: A first pilot signal is transmitted at a first frequency for a first coverage area (e.g., an outdoor area). A second pilot signal is transmitted at a second frequency for a second coverage area (e.g., an indoor area). The first pilot signal at the second frequency is transmitted into a portion of the second coverage area, the second coverage area at least overlapping with the first coverage area. Further, the first pilot signal is transmitted at the second frequency in the second coverage area. In an example, the first pilot signal at the first frequency is transmitted from an outdoor base station, the second pilot signal at the second frequency is transmitted by an indoor base station, the first pilot signal at the second frequency is transmitted into the second coverage area (e.g., an interior of a building from a building exit point) by an antenna (e.g., not necessarily at a base station) and the second pilot signal at the first frequency is transmitted by the indoor base station.

Abstract: Embodiments of the present invention disclose an Ethernet ring protection switching method, node, and system. In an Ethernet ring protection switching method is disclosed, it is determined whether the current link is a lower-bandwidth link according to bandwidth information of a current link and bandwidth information of another link on a ring. If the current link is a lower-bandwidth link, a port corresponding to the current link is blocked.

Abstract: A label printer is provided. The label printer comprises a stationary housing (100) and a side cover (200) which are rotationally connected; a mechanism set is fixed in the stationary housing; at least two fixed shafts are set between a first side plate (800) and a second side plate (801) of the printer module frame; a pinch plate (5) used to support the second side plate is rotationally installed at the side of the mechanism base; a printer set (10,2,1) between the first side plate and the second side plate. The label printer in the invention is convenient to change or assemble the consumable.

Abstract: An autonomous mobile device system includes a plurality of magnetic components and an autonomous mobile device. The magnetic components are adapted to be arranged on a surface in a space-apart manner and produce a magnetic field serving as a virtual boundary on the surface. The autonomous mobile device is configured to move on the surface, and includes a housing, a magnetic sensor for detecting the magnetic field, and a motion control module for controlling movement of the autonomous mobile device. The motion control module is operable in a first movement mode, in which the autonomous mobile device is restrained from crossing the virtual boundary when the magnetic sensor detects the magnetic field.

Abstract: Embodiments of the present disclosure provide an Ethernet ring protection switching method, network device and system. In the embodiments of the present disclosure, a node obtains bandwidth information of a first link on an Ethernet ring on which the node is located, and determines that bandwidth of the first link changes, where there is at least one Ethernet ring protection instance on the Ethernet ring, and then the node determines ports of the node, where the at least one Ethernet ring protection instance passes through the ports, so that the node can query pre-configured correspondence between bandwidth information and switching information of each link on the Ethernet ring, and execute, through the ports of the node, a switching operation corresponding to the bandwidth information of the first link.

Abstract: A label printer is provided. The label printer comprises a stationary housing (100) and a side cover (200) which are rotationally connected; a mechanism set is fixed in the stationary housing; at least two fixed shafts are set between a first side plate (800) and a second side plate (801) of the printer module frame; a pinch plate (5) used to support the second side plate is rotationally installed at the side of the mechanism base; a printer set (10,2,1) between the first side plate and the second side plate. The label printer in the invention is convenient to change or assemble the consumable.

Abstract: A quaternary oxide includes a dopant metal, a dopant nonmetal, titanium, and oxygen. The atomic ratio of titanium, oxygen and dopant nonmetal may be 1:0.5-1.99:0.01-1.5. Quaternary oxides may be used in catalytic compositions, in coatings for disinfecting surfaces and in coatings for self-cleaning surfaces. A method of making a quaternary oxide includes combining ingredients including a titanium source, a dopant nonmetal source, a dopant metal salt, and a polar organic solvent to form a reaction mixture; and heating the reaction mixture.

Abstract: A first pilot signal is transmitted at a first frequency for a first coverage area (e.g., an outdoor area). A second pilot signal is transmitted at a second frequency for a second coverage area (e.g., an indoor area). The first pilot signal at the second frequency is transmitted into a portion of the second coverage area, the second coverage area at least overlapping with the first coverage area. Further, the first pilot signal is transmitted at the second frequency in the second coverage area. In an example, the first pilot signal at the first frequency is transmitted from an outdoor base station, the second pilot signal at the second frequency is transmitted by an indoor base station, the first pilot signal at the second frequency is transmitted into the second coverage area (e.g., an interior of a building from a building exit point) by an antenna (e.g., not necessarily at a base station) and the second pilot signal at the first frequency is transmitted by the indoor base station.

Abstract: A system and method for analyzing data from a gel permeation chromatography (GPC) or size exclusion chromatography (SEC) system fro determining a polymeric sample's radius of gyration. Data from two or more detectors is used with a least-squares minimization fit. A novel method includes the simultaneous determination of a sample's radius of gyration using data from a light scattering detector that collects data from at least two incident angles. Detectors within the inventive method include a multi-angle light scattering (LS) detector, viscometer (V) and a refractive index (RI) detector.

Abstract: The photosensitive compound of the present invention contains the following unit: ##STR1## and is particularly expressed by the following formula: ##STR2## Different photosensitive resin compositions can be prepared from this novel photosensitive resin compound, and the resulting photosensitive resin compositions do not raise the problem of environmental pollution, exhibit high resolution, possess a high level of sensitivity, and exhibit excellent adhesion with substrates, coating characteristics and storage stability.