Abstract: A centrifugal compressor includes a volute base block, a volute cover plate, an impeller, a diffuser-adjusting assembly, a radial constraint assembly, an axial constraint assembly and a driving assembly. A diffuser and a connected volute are formed between the cover plate and the base block. The impeller discharges gas to the centrifugal compressor through the diffuser and the volute. The diffuser adjustment assembly includes a driving ring, a driving rod, a pin and a diffuser ring. The radial constraint assembly is disposed on an inner circumference surface of the driving ring. The axial constraint assembly on an outer circumference surface of the driving ring is located between the top and bottom portions. The drive assembly is to rotate the driving ring. When the driving ring rotates, the pin slides along the pin track, and the driving rod displaces the diffuser ring to adjust a flow-path width of the diffuser.

Abstract: A centrifugal compressor includes a volute base block, a volute cover plate, an impeller, a diffuser-adjusting assembly, a radial constraint assembly, an axial constraint assembly and a driving assembly. A diffuser and a connected volute are formed between the cover plate and the base block. The impeller discharges gas to the centrifugal compressor through the diffuser and the volute. The diffuser adjustment assembly includes a driving ring, a driving rod, a pin and a diffuser ring. The radial constraint assembly is disposed on an inner circumference surface of the driving ring. The axial constraint assembly on an outer circumference surface of the driving ring is located between the top and bottom portions. The drive assembly is to rotate the driving ring. When the driving ring rotates, the pin slides along the pin track, and the driving rod displaces the diffuser ring to adjust a flow-path width of the diffuser.

Abstract: A reflective mask-less laser direct imaging system includes laser equipment that includes laser light sources, focusing lenses, a scanner and a compensating lens. The focusing lenses focus light beams onto a photosensitive layer of a substrate from the laser light sources. The scanner includes a rotatable polygonal mirror formed with multiple facets used to reflect the light beams to the substrate from the focusing lenses. The compensating lens includes a convex surface pointed at the polygonal mirror and a flat surface pointed at the compensating lens. The light beams go from the polygonal mirror into the compensating lens via the convex surface. The light beams leave the compensating lens via the flat surface before heading for the substrate.

Abstract: A magnetic bearing centrifugal compressor includes a magnetic bearing spindle having a thrust disk, front and rear axial bearings, an impeller and at least one labyrinth seal. The front and the rear axial bearings are disposed individually to opposing sides of the thrust disk. First and second clearances exist axially between the rear and front axial bearings, respectively, and the thrust disk. The impeller connects a front end of the magnetic bearing spindle. The labyrinth seal pairs the magnetic bearing spindle into an oblique arrangement with respect to the axial direction, and each the labyrinth seal is spaced from the magnetic bearing spindle or the impeller by a labyrinth-seal clearance. By controlling the thrust disk axially, a clearance ratio of the first clearance to the second clearance can be varied to adjust the labyrinth-seal clearance. In addition, a magnetic bearing centrifugal compressor controlling method is also provided.

Abstract: A magnetic bearing centrifugal compressor includes a magnetic bearing spindle having a thrust disk, front and rear axial bearings, an impeller and at least one labyrinth seal. The front and the rear axial bearings are disposed individually to opposing sides of the thrust disk. First and second clearances exist axially between the rear and front axial bearings, respectively, and the thrust disk. The impeller connects a front end of the magnetic bearing spindle. The labyrinth seal pairs the magnetic bearing spindle into an oblique arrangement with respect to the axial direction, and each the labyrinth seal is spaced from the magnetic bearing spindle or the impeller by a labyrinth-seal clearance. By controlling the thrust disk axially, a clearance ratio of the first clearance to the second clearance can be varied to adjust the labyrinth-seal clearance. In addition, a magnetic bearing centrifugal compressor controlling method is also provided.

Abstract: The present invention provides a direct exposure machine without mask, comprising a stage device and an exposure device. The stage device supports an exposed substrate, a surface of which coats with a sensitive layer. The exposure device shifts relatively to the stage device and includes a first exposure module. The first exposure module includes a light source, a penetrating scanner and multi-focus lenses. The light source outputs multiple beams arranged parallel to each other. The penetrating scanner includes a multifaceted prism driven to rotate, which has multiple facets. Each beam goes into one facet and out from the other to the sensitive layer of the exposed substrate. The multi-focus lenses are disposed between the light source and the multifaceted prism for focusing the beams to the substrate to be exposed.

Abstract: An internal hot gas bypass device coupled with inlet guide vane for centrifugal compressor includes an inlet guide vane assembly, a driving motor assembly and a gas bypass valve assembly. The inlet guide vane assembly further includes a master vane, a plurality of slave vanes, a vane-front fixing ring, a vane-rear fixing ring, a vane-driving ring, a connecting pipe and a vane-opening indicating disk. The driving motor assembly further includes a motor, a driving unit and a motor fixing base. The gas bypass valve assembly further includes a valve, an external fixing-and-guiding ring, an internal fixing-and-guiding ring, a driven element, a spring, a sealing ring, a valve stud and a valve base. The driving motor assembly is connected with the driving unit and the master vane of the inlet guide vane assembly via a connecting rod, and is further connected with the slave vanes of the gas bypass valve assembly.

Abstract: An internal hot gas bypass device coupled with inlet guide vane for centrifugal compressor includes an inlet guide vane assembly, a driving motor assembly and a gas bypass valve assembly. The inlet guide vane assembly further includes a master vane, a plurality of slave vanes, a vane-front fixing ring, a vane-rear fixing ring, a vane-driving ring, a connecting pipe and a vane-opening indicating disk. The driving motor assembly further includes a motor, a driving unit and a motor fixing base. The gas bypass valve assembly further includes a valve, an external fixing-and-guiding ring, an internal fixing-and-guiding ring, a driven element, a spring, a sealing ring, a valve stud and a valve base. The driving motor assembly is connected with the driving unit and the master vane of the inlet guide vane assembly via a connecting rod, and is further connected with the slave vanes of the gas bypass valve assembly.

Abstract: An inlet guide vane assembly is disclosed, which comprises: a housing, configured with a first penetration part and a plurality of first grooves; at least one fixing ring, each configured with a second penetration part and a plurality of second grooves; at least one rotary ring, each configured with a third penetration part and a plurality of sliding chutes, wherein the first, the second and the third penetration parts are arranged in communication with one another; a plurality of vane units, each vane unit is composed of a vane, a linkage and a sliding block; and at least one driving unit, for driving one vane of the plural vanes to swing, thus driving the rotary ring to rotate simultaneously, bringing along the other vanes to swing, enabling the sliding blocks to slide inside corresponding sliding chutes, and consequently flipping the vane from a first state to a second state.

Abstract: A zoom lens and a zoom lens module are provided. The zoom lens is configured to form an image of an object at an object side onto an image plane at an image side. The zoom lens includes a first lens group, a second lens group, a third lens group and a fourth lens group disposed in sequence from the object side towards the image side. The refractive powers of the first lens group, the second lens group, and the third lens group are negative, positive, and negative, respectively. The zoom lens satisfies 1.90<|T1G/FW|<2.40. T1G is a distance of the first lens group along an optical axis of the zoom lens, and FW is an effective focal length of the zoom lens when the zoom lens is at a wide-end.

Abstract: A module for data center is presented, which is used for heat sinking of a heat source. The module for data center includes a first chamber, a second chamber, and a heat pipe. The heat source is positioned in the first chamber. The second chamber is adjacent to the first chamber. In addition, the heat pipe has an evaporation end positioned inside the first chamber and a condensation end positioned inside the second chamber. The heat pipe absorbs the heat energy in the first chamber with the evaporation end, transfers the heat energy to the condensation end, and eliminates the heat energy with the condensation end.

Abstract: An inlet guide vane assembly is disclosed, which comprises: a housing, configured with a first penetration part and a plurality of first grooves; at least one fixing ring, each configured with a second penetration part and a plurality of second grooves; at least one rotary ring, each configured with a third penetration part and a plurality of sliding chutes, wherein the first, the second and the third penetration parts are arranged in communication with one another; a plurality of vane units, each vane unit is composed of a vane, a linkage and a sliding block; and at least one driving unit, for driving one vane of the plural vanes to swing, thus driving the rotary ring to rotate simultaneously, bringing along the other vanes to swing, enabling the sliding blocks to slide inside corresponding sliding chutes, and consequently flipping the vane from a first state to a second state.

Abstract: An electronic device obtains a motion of a displaced object in two captured video frames utilizing phase correlation of the two frames. The electronic device identifies a magnitude of the motion and an area in a phase correlation surface corresponding to an area of the object, and accordingly determines if the motion is a qualified motion operable to trigger a gesture command of the electronic device. The phase correlation surface is obtained from the phase correlation of the two frames.

Abstract: A display device controlled by a remote control includes an image capture device and a display screen. A remote control of the display device emits light using a light-emitting element, and real-time images of the remote control are captured during the time when the light-emitting element emits light. The captured images are analyzed to calculate a horizontal movement and a vertical movement of the light-emitting element. The display device controls movements of a cursor displayed on the display screen according to horizontal movement and a vertical movement of the light-emitting element.

Abstract: An electronic device obtains a motion of a displaced object in two captured video frames utilizing phase correlation of the two frames. The electronic device identifies a magnitude of the motion and an area in a phase correlation surface corresponding to an area of the object, and accordingly determines if the motion is a qualified motion operable to trigger a gesture command of the electronic device. The phase correlation surface is obtained from the phase correlation of the two frames.

Abstract: An electronic device obtains a motion of a displaced object in two captured video frames utilizing phase correlation of the two frames. The device identifies magnitude of the motion and an area in a phase correlation surface corresponding to an area of the object, and accordingly determines if the motion is a qualified motion operable to trigger a gesture command of the device. The phase correlation surface is obtained from the phase correlation of the two frames.

Abstract: A zoom lens and a zoom lens module are provided. The zoom lens is configured to form an image of an object at an object side onto an image plane at an image side. The zoom lens includes a first lens group, a second lens group, a third lens group and a fourth lens group disposed in sequence from the object side towards the image side. The refractive powers of the first lens group, the second lens group, and the third lens group are negative, positive, and negative, respectively. The zoom lens satisfies 1.90<|T1G/FW|<2.40. T1G is a distance of the first lens group along an optical axis of the zoom lens, and FW is an effective focal length of the zoom lens when the zoom lens is at a wide-end.

Abstract: A module for data center is presented, which is used for heat sinking of a heat source. The module for data center includes a first chamber, a second chamber, and a heat pipe. The heat source is positioned in the first chamber. The second chamber is adjacent to the first chamber. In addition, the heat pipe has an evaporation end positioned inside the first chamber and a condensation end positioned inside the second chamber. The heat pipe absorbs the heat energy in the first chamber with the evaporation end, transfers the heat energy to the condensation end, and eliminates the heat energy with the condensation end.

Abstract: A boot system of an electronic device includes a central processing unit (CPU), a NAND flash, a synchronous dynamic random access memory (SDRAM), and a pulse count unit. The NAND flash and the SDRAM are electronically connected with the CPU. The pulse count unit is electronically connected with the CPU and the NAND flash. The pulse count unit may initialize and enable the NAND flash. The CPU reads a pre-boot loader stored in the NAND flash and loads the pre-boot loader in the SDRAM. The CPU executes the pre-boot loader stored in the SDRAM to boot the electronic device.

Abstract: A structure of heat dissipation of an electronic device includes at least one heat pipe and a cooler. The heat pipe has a condensation end and an evaporation end opposite to each other, and the evaporation end is disposed on a heat generating element of the electronic device. The cooler is disposed on a rack and has a chamber therein, and the chamber has an inner shell having a cooling fluid therein. When the electronic device is mounted in the rack, the condensation end of the heat pipe is inserted into the cooler and positioned into the inner shell. The evaporation end absorbs the heat energy of the heat generating element, and transfers the heat energy to the condensation end, such that the cooling fluid dissipates the heat energy of the condensation end.