Abstract: An L-arabinose is prepared through the following processes: (1) dissolving L-arabinose starting material in water, adding activated carbon, filtering, and removing the activated carbon to give a clear filtered sugar liquid; and (2) subjecting 40-55% (v %) of the clear filtered sugar liquid obtained in step (1) to evaporation until sugar degree reaches 55-65% Brix, adding the remaining clear filtered sugar liquid in a fed-batch manner after adding a proper amount of the L-arabinose starting material as seed crystal, and continuing concentration after the fed-batch addition is completed. The process of preparing the arabinose and the preparation thereof does not involve addition of any auxiliary material nor complicated granulation processes. The obtain product can be directly applied as a bowel cleanser drug. The range of particle size is controllable.

Abstract: An angle grinder includes a housing, an output shaft, and a motor. The motor includes a stator assembly, a rotor assembly including a motor shaft configured to rotate about a first axis, a commutator, and a carbon brush. The commutator includes a bushing, configured to connect the commutator to the motor shaft, a plurality of commutator segments, sequentially distributed in a circumferential direction around the first axis and arranged around the bushing, and an insulating member, configured to bond the bushing and the plurality of commutator segments so as to constitute a whole.

Abstract: An angle grinder includes a housing, an output shaft, and a motor. The motor includes a stator assembly, a rotor assembly including a motor shaft configured to rotate about a first axis, a commutator, and a carbon brush. The commutator includes a bushing, configured to connect the commutator to the motor shaft, a plurality of commutator segments, sequentially distributed in a circumferential direction around the first axis and arranged around the bushing, and an insulating member, configured to bond the bushing and the plurality of commutator segments so as to constitute a whole.

Abstract: The present invention discloses a method, a client device, and a data forwarding device for transmitting data through a serial port. The method comprises providing at least two virtual logical serial ports mapped to a physical serial port, providing a main serial port connected to the physical serial port and extended serial ports which correspond to the logical serial ports one by one; encapsulating first data and a specified logical serial port according to a preset serial port protocol to obtain a first data frame; transmitting the first data frame to the data forwarding device through the physical serial port; receiving the first data frame through the main serial port, and decapsulating the first data frame according to the serial port protocol to obtain the first data and the specified logical serial port; and transmitting the first data to the extended serial port corresponding to the specified logical serial port.

Abstract: The present invention discloses a method, a client device, and a data forwarding device for transmitting data through a serial port. The method comprises providing at least two virtual logical serial ports mapped to a physical serial port, providing a main serial port connected to the physical serial port and extended serial ports which correspond to the logical serial ports one by one; encapsulating first data and a specified logical serial port according to a preset serial port protocol to obtain a first data frame; transmitting the first data frame to the data forwarding device through the physical serial port; receiving the first data frame through the main serial port, and decapsulating the first data frame according to the serial port protocol to obtain the first data and the specified logical serial port; and transmitting the first data to the extended serial port corresponding to the specified logical serial port.

Abstract: An embodiment of the present invention comprises a method and apparatus of detecting edges. Light directed from any angle at a smooth surface will not cast a shadow regardless of the printing on the surface. Light cast at an appropriate angle on a stepped surface casts a shadow. The apparatus and method of the present invention cast light from several directions/sources while focusing on one location. If the same level of gray is detected from all sources, there is no shadow and hence the location is not an edge. If the result of one or more of the light sources is a darker image than the others, there is indication of an edge by the presence of a shadow. The use of edge detection in an insertion machine can help to decrease the amount of user adjustment needed to operate the machine using various sizes of envelopes.

Abstract: An embodiment of the present invention comprises a method and apparatus of detecting edges. Light directed from any angle at a smooth surface will not cast a shadow regardless of the printing on the surface. Light cast at an appropriate angle on a stepped surface casts a shadow. The apparatus and method of the present invention cast light from several directions/sources while focusing on one location. If the same level of gray is detected from all sources, there is no shadow and hence the location is not an edge. If the result of one or more of the light sources is a darker image than the others, there is indication of an edge by the presence of a shadow. The use of edge detection in an insertion machine can help to decrease the amount of user adjustment needed to operate the machine using various sizes of envelopes.