Abstract: A power supply circuit is provided. The power factor correction (PFC) circuit is used to perform a power factor correction according to a first voltage to generate an intermediate voltage. The first storage capacitor is used to store a first electrical energy related to the intermediate voltage. The boost conversion circuit is connected to the PFC circuit and used to generate an output voltage according to the intermediate voltage. The boost conversion circuit includes a first post-stage inductor, a first post-stage diode and a first post-stage transistor. The second storage capacitor is used to store a second electrical energy related to the output voltage. The capacitance value of the second storage capacitor is less than the capacitance value of the first storage capacitor; the first electrical energy is completely or partially transferred as the second electrical energy.

Abstract: The present invention relates to a method for preparing a modified stem cell, including the following steps: a cell culture step: culturing stem cells in a first culture medium of a culture dish at a predetermined cell density, and removing the first culture medium after a first culture time to obtain a first cell intermediate; an activity stimulation step: preserving the first cell intermediate in a freezing container having a cell cryopreservation solution, and performing a constant temperature stimulation treatment or a variable temperature stimulation treatment for at least more than 1 day; and a product collection step: after completing the activity stimulation step, placing the freezing container in an environment at a thawing temperature for thawing, and then removing the cell cryopreservation solution to obtain the modified stem cell. The modified stem cell can release at least one or more of IL-4, IL-5, IL-13, G-CSF, Fractalkine, and EGF.

Abstract: An image capturing system of an unmanned aerial vehicle is disclosed. The image capturing system includes a camera; a platform carrying the camera; and a platform controller configured to adjust a rotating speed of the camera through the platform based on a rotating instruction information and a current zoom magnification of the camera. The current zoom magnification is substantially real-time obtained from the camera. An image capturing method of an unmanned aerial vehicle is also disclosed. In the method a first instruction information and a rotating instruction information are received. A camera is zoomed based on the first instruction information. A current zoom magnification of the camera is obtained. A rotating speed of the camera is adjusted through a platform based on the rotating instruction information and the current zoom magnification.

Abstract: An image capturing system of an unmanned aerial vehicle is disclosed. The image capturing system includes a camera; a platform carrying the camera; and a platform controller configured to adjust a rotating speed of the camera through the platform based on a rotating instruction information and a current zoom magnification of the camera. The current zoom magnification is substantially real-time obtained from the camera. An image capturing method of an unmanned aerial vehicle is also disclosed. In the method a first instruction information and a rotating instruction information are received. A camera is zoomed based on the first instruction information. A current zoom magnification of the camera is obtained. A rotating speed of the camera is adjusted through a platform based on the rotating instruction information and the current zoom magnification.

Abstract: A computer housing is adapted for mounting an interface card, and includes a housing body and a positioning device. The housing body includes a mounting portion and a first fixing portion disposed adjacent to the mounting portion. The positioning device includes a positioning component having a second fixing portion. The positioning component is pivotable relative to the housing body between a card retaining position, where the second fixing portion engages the first fixing portion and the positioning component is disposed to be capable of blocking removal of the interface card from the mounting portion, and a card releasing position, where the second fixing portion is disengaged from the first fixing portion and the positioning component is disposed to permit removal of the interface card from the mounting portion.

Abstract: A fixture for fixing a data storage unit is disclosed. The fixture includes: a body receives the computer components and defines a protrusion and a hole thereon; a separating piece includes a separating portion correspondingly to the protrusion; a fixing piece includes a lockpin correspondingly to the hole of the body, and the separating piece is set between the fixing piece and the body; and a controlling component fixes the fixing piece on the body. The fixture of the present invention can rapidly fix or remove a data storage unit inside a computer case without any screws. The assembly cost and the maintaining cost of the fixture are low, and the assembly and the disassembly of which is simple and timesaving.

Abstract: A computer housing is adapted for mounting an interface card, and includes a housing body and a positioning device. The housing body includes a mounting portion and a first fixing portion disposed adjacent to the mounting portion. The positioning device includes a positioning component having a second fixing portion. The positioning component is pivotable relative to the housing body between a card retaining position, where the second fixing portion engages the first fixing portion and the positioning component is disposed to be capable of blocking removal of the interface card from the mounting portion, and a card releasing position, where the second fixing portion is disengaged from the first fixing portion and the positioning component is disposed to permit removal of the interface card from the mounting portion.

Abstract: A fixture for fixing a data storage unit is disclosed. The fixture includes: a body receives the computer components and defines a protrusion and a hole thereon; a separating piece includes a separating portion correspondingly to the protrusion; a fixing piece includes a lockpin correspondingly to the hole of the body, and the separating piece is set between the fixing piece and the body; and a controlling component fixes the fixing piece on the body. The fixture of the present invention can rapidly fix or remove a data storage unit inside a computer case without any screws. The assembly cost and the maintaining cost of the fixture are low, and the assembly and the disassembly of which is simple and timesaving.