Abstract: A fan module includes a first fan frame and a second fan frame. A side surface of the first fan frame includes a number of latching posts and a number of positioning portions extending toward the second fan frame. A side surface of the second fan frame defines a number of latching grooves in one-to-one correspondence with the latching posts. The side surface of the second fan frame further defines a number of rotating grooves in one-to-one correspondence with the positioning portions. Engagement between the latching posts and the latching grooves restricts a tangential relative displacement between the first fan frame and the second fan frame. Engagement between the rotating grooves and the positioning portions restricts an axial displacement between the first fan frame and the second fan frame.

Abstract: A fastening nut and a fastening assembly that includes the fastening nut. The fastening nut includes a collar and a receiving column, the receiving column includes an engageable receiving portion and a deformable receiving portion. The deformable receiving portion includes an upper barrel and a lower barrel connected to each other. The upper barrel has a right cone shape, the lower barrel has an inverted cone shape, and an outwardly-protruding bent portion is formed at a joint between the upper barrel and the lower barrel. The deformable receiving portion includes at least two holes provided at intervals in a circumferential direction of the receiving column.

Abstract: Disclosed is an LED display device and a method for driving the same. The LED display device comprises: an LED array comprising LEDs; a row driving module having output terminals, each of which is connected to a corresponding LED row for providing a supply voltage; constant current sources, each of which controls a driving current flowing through a corresponding LED column when a corresponding LED row is powered by the supply voltage; and voltage limiting modules, each of which is connected between a corresponding constant current source and a corresponding LED column. Current paths through a short-circuited LED and an open-circuited LED are disconnected by a corresponding voltage limiting module when there is a short-open failure in the LEDs. The LED display device can be used to improve image quality and reduce power consumption even if there is a short-open failure in the LEDs.

Abstract: A differential cooperative active steering system for a front-axle independent-drive vehicle with electric wheels includes a steering rack which is arranged between a first steering wheel and a second steering wheel, and is able to generate lateral displacement and pull the first and second steering wheels to steer; a planetary gear mechanism, including a first input end, a second input end and an output end; a steering angle coupling motor, connected to the first input end; and an input shaft of the steering wheel, connected to the second input end. The planetary gear mechanism can realize the coupling between an input steering angle of an input shaft of the steering wheel and an input steering angle of the steering angle coupling motor. In addition, a method for controlling the differential cooperative active steering system is provided.

Abstract: The present invention discloses a high-reliability copper alloy bonding wire for electronic packaging and a preparation method therefor; the bonding wire comprises the following raw material components in percentage by weight: a copper content being 99.75%-99.96%, a tungsten content being 0.01-0.1%, a silver content being 0.01%-0.03%, a scandium content being 0.01%-0.02%, a titanium content being 0.001%-0.03%, a chromium content being 0.001%-0.03%, and an iron content being 0.001%-0.02%. The preparation method therefor comprises: extracting high-purity copper with a purity greater than 99.99%, preparing same as copper alloy ingots, and further preparing same as as-cast copper alloy crude bars, drawing the crude bars to form copper alloy wires, subjecting same to a heat treatment, and then precise drawing, a heat treatment, and cleaning to obtain copper alloy bonding wires of different specifications.

Abstract: Provided is a method for preparing an N-cyclopropylmethyl aniline compound, which comprises reacting a compound represented by Formula IV with cyclopropyl formaldehyde in the presence of metal zinc and an acid to generate an N-cyclopropylmethyl aniline compound represented by Formula I. The method of the present disclosure has mild reaction conditions, short reaction time, a high yield, simple processes, simple operations and low costs, and is more applicable to industrial production.

Abstract: Disclosed is an LED display device and a method for driving the same. The LED display device comprises: an LED array comprising LEDs; a row driving module having output terminals, each of which is connected to a corresponding LED row for providing a supply voltage; constant current sources, each of which controls a driving current flowing through a corresponding LED column when a corresponding LED row is powered by the supply voltage; and voltage limiting modules, each of which is connected between a corresponding constant current source and a corresponding LED column. Current paths through a short-circuited LED and an open-circuited LED are disconnected by a corresponding voltage limiting module when there is a short-open failure in the LEDs. The LED display device can be used to improve image quality and reduce power consumption even if there is a short-open failure in the LEDs.

Abstract: A LED driving system for a LED matrix having a plurality of LEDs connected in parallel. The LED driving system includes a plurality of driving modules. Each one of the plurality of driving modules drives a corresponding one of the plurality of LEDs. The plurality of LEDs are divided into a plurality of groups. The plurality of driving modules drive the plurality of LEDs ON successively group by group. In each one of the plurality of groups, the LESs are driven ON successively row by row, and for each row in each one of the plurality of groups, the LEDs are driven ON successively column by column with a programmed delay time between the LEDs in every two successive columns. Each one of the plurality of driving modules can include a grayscale control module for adjusting a brightness of the corresponding one of the plurality of LEDs.

Abstract: A control circuit and method for a voltage converter. The control circuit having a ramp circuit, a reference generating circuit, a comparison circuit and a logic circuit. The ramp circuit generates a ramp signal that decreases from the moment the power switch is turned off and increases from the moment the power switch is turned on. The reference generating circuit generates a reference voltage. The comparison circuit compares the reference voltage with the sum of the feedback voltage and the ramp signal to generate a comparison signal. The logic circuit uses the comparison signal and a clock signal to generate the control signal to control a power switch of the voltage converter.

Abstract: The present invention relates to a steer-by-wire and independent-drive integrated wheel-side electric drive device, including a first double-rotor motor and a second double-rotor motor, fixedly arranged coaxially along an axial direction of a motor, an inner rotor of the first double-rotor motor is connected with a first drive shaft and is used for driving a wheel on one side to rotate; an inner rotor of the second double-rotor motor is connected with a second drive shaft and is used for driving a wheel on the other side to rotate; an outer rotor of the first double-rotor motor and an outer rotor of the second double-rotor motor are respectively connected with a driving gear by virtue of an output shaft.

Abstract: A control circuit and method for a voltage converter. The control circuit having a ramp circuit, a reference generating circuit, a comparison circuit and a logic circuit. The ramp circuit generates a ramp signal that decreases from the moment the power switch is turned off and increases from the moment the power switch is turned on. The reference generating circuit generates a reference voltage. The comparison circuit compares the reference voltage with the sum of the feedback voltage and the ramp signal to generate a comparison signal. The logic circuit uses the comparison signal and a clock signal to generate the control signal to control a power switch of the voltage converter.

Abstract: An active steering system using planetary gear set with less tooth difference and a control method thereof. The system includes a first input shaft with one end connected to a steering wheel of an automobile and the other end fixedly sleeved with a first gear; a ring gear sleeve, where a ring gear is fixedly mounted in the ring gear sleeve circumferentially, and a hollow shaft protrudes from a center of an end of the ring gear sleeve and is fixedly sleeved with a second gear engaged with the first gear; a second input shaft with one end fixedly connected to an output end of a coupled motor and the other end fixedly sleeved with a third gear; an eccentric shaft with one end fixedly sleeved with a fourth gear engaged with the third gear and the other end sleeved in the hollow shaft and eccentrically provided with a boss.

Abstract: A smart communication interface for a LED driving system driving a LED matrix having a plurality of LEDs. The smart communication interface may have a data write transaction structure in write mode. The data write transaction structure includes an address code for identifying a corresponding one LED among the plurality of LEDs; an R/W indicating code for indicating whether the smart communication interface is in write mode; and a grayscale command code for indicating a programmed grayscale command value for the corresponding one LED identified by the address code. The smart communication interface may include a data read transaction structure in read mode. The data read transaction structure includes the address code, the R/W indicating code and a grayscale read-back code for indicating a grayscale command value for the corresponding one LED identified by the address code.

Abstract: The present invention discloses a nanoporous copper-zinc-aluminum shape memory alloy and a preparation method and an application thereof. According to the method, firstly a pure Cu block, a pure Zn block and a pure Al block are proportioned in a certain mass ratio before being smelted to obtain a copper-zinc-aluminum alloy ingot; the obtained copper-zinc-aluminum alloy ingot is melt spun using a copper roller rapid quenching method under vacuum protection to obtain an ultrathin strip CuZnAl master alloy which is then subjected to an etching treatment with a solution containing chloride ions at a temperature of 0˜80° C. for 10˜300 minutes to obtain a nanoporous Cu/CuZnAl material; and finally the nanoporous CuZnAl material is sealed in a high vacuum quartz tube for a heat treatment to obtain a nanoporous copper-zinc-aluminum shape memory alloy having a superelastic single ? phase at room temperature.

Abstract: A vibration-proofed fan frame includes a housing and a base surrounded by the housing. A hollow tube is arranged on the base and has the rotary connection with an impeller of the heat dissipation fan. The base includes a disc and a plurality of ribs extending outwards from periphery of the disc. The fan frame further includes a buffer member within the structural interconnections between the disc and the housing. The buffer member includes first elements. The first elements are embedded in the disc. A heat dissipation fan having the fan frame described is also presented.

Abstract: A heat dissipating fan includes a housing, a stator, and a rotor. The housing includes a base. A hollow tube protrudes from a surface of the base. A through-hole is defined on the hollow tube. The housing further includes a barrel, a first buffered structure formed on a whole outer surface of the barrel, and a second buffered structure. An end portion of the barrel is received in the through-hole. The barrel and the hollow tube are separated by the first buffered structure. The stator is sleeved on the first buffered structure. The second buffered structure is annular and formed on an outer surface of the first buffered structure to resist between the hollow tube and the stator, thereby separating the hollow tube and the stator. The rotor is mounted on the barrel by a shaft. The disclosure also provides an electronic device having the heat dissipating fan.

Abstract: A LED driving system for a LED matrix having a plurality of LEDs connected in parallel. The LED driving system includes a plurality of driving modules. Each one of the plurality of driving modules drives a corresponding one of the plurality of LEDs. The plurality of LEDs are divided into a plurality of groups. The plurality of driving modules drive the plurality of LEDs ON successively group by group. In each one of the plurality of groups, the LESs are driven ON successively row by row, and for each row in each one of the plurality of groups, the LEDs are driven ON successively column by column with a programmed delay time between the LEDs in every two successive columns. Each one of the plurality of driving modules can include a grayscale control module for adjusting a brightness of the corresponding one of the plurality of LEDs.

Abstract: A LED driving system for a LED matrix having a plurality of LEDs connected in parallel. The LED driving system includes a plurality of driving modules. Each one of the plurality of driving modules drives a corresponding one of the plurality of LEDs. Each one of the plurality of driving modules can include a local current driver receiving a reference current and providing a driving current to the corresponding one LED, and a local current tuning module receiving a U-bit current tuning command to tune the driving current for the corresponding one LED to reach a desired driving current using the U-bit current tuning command which provides a predetermined number of tuning steps ranging from 0 to 2U.

Abstract: Embodiments are disclosed for collaboratively scanning and processing sensor data for building a map of an environment around a group of vehicles. An example an in-vehicle computing system of a vehicle includes a sensor subsystem in communication with an optical sensor, a processor, and memory storing instructions executable by the processor to instruct the optical sensor to scan an assigned region around the vehicle, receive locally scanned data corresponding to the assigned region, process the scanned data to build a first portion of a three-dimensional map, transmit the processed scanned data to at least one other vehicle, receive additional map data from the at least one other vehicle, and build a second, different portion of the three-dimensional map using the received additional map data. In a first example of the in-vehicle computing system, the optical sensor may additionally or alternatively include a Light Detection and Ranging (LiDAR) sensor system.

Abstract: Embodiments are disclosed for collaboratively scanning and processing sensor data for building a map of an environment around a group of vehicles. An example an in-vehicle computing system of a vehicle includes a sensor subsystem in communication with an optical sensor, a processor, and memory storing instructions executable by the processor to instruct the optical sensor to scan an assigned region around the vehicle, receive locally scanned data corresponding to the assigned region, process the scanned data to build a first portion of a three-dimensional map, transmit the processed scanned data to at least one other vehicle, receive additional map data from the at least one other vehicle, and build a second, different portion of the three-dimensional map using the received additional map data. In a first example of the in-vehicle computing system, the optical sensor may additionally or alternatively include a Light Detection and Ranging (LiDAR) sensor system.