Abstract: The present application provides a system for unmanned aerial vehicle (UAV) parachute landing. An exemplary system includes a detector configured to detect at least one of a flight speed, a wind speed, a wind direction, a position, a height, and a voltage of a UAV. The system also includes a memory storing instructions and a processor configured to execute the instructions to cause the system to: determine whether to open a parachute of the UAV in accordance with a criterion, responsive to the determination to open the parachute of the UAV, stop a motor of the UAV that spins a propeller of the UAV, and open the parachute of the UAV after stopping the motor of the UAV for a first period.

Abstract: A wafer grinding parameter optimization method and an electronic device are provided. The method includes the following. A natural frequency of a grinding wheel spindle of wafer processing equipment is obtained, and a grinding stability lobe diagram is generated accordingly. A grinding speed is selected based on a speed range of the grinding wheel spindle. Multiple grinding parameter combinations are determined based on the grinding speed. Multiple grinding simulation result combinations corresponding to the grinding parameter combinations are generated. A specific grinding parameter combination is selected based on each of the grinding simulation result combinations, and the wafer processing equipment is set accordingly.

Abstract: A semiconductor structure includes a stack of semiconductor layers disposed over a substrate, a metal gate stack having a top portion disposed over the stack of semiconductor layers and a bottom portion interleaved with the stack of semiconductor layers, an inner spacer disposed on sidewalls of the bottom portion of the metal gate stack, an air gap enclosed in the inner spacer, and an epitaxial source/drain (S/D) feature disposed over the inner spacer and adjacent to the metal gate stack.

Abstract: A photomask structure including a first layout pattern and a second layout pattern is provided. The second layout pattern is located on one side of the first layout pattern. The first layout pattern and the second layout pattern are separated from each other. The first layout pattern has a first edge and a second edge opposite to each other. The second layout pattern has a third edge and a fourth edge opposite to each other. The third edge of the second layout pattern is adjacent to the first edge of the first layout pattern. The second layout pattern includes a first extension portion exceeding an end of the first layout pattern. The first extension portion includes a first protruding portion protruding from the third edge of the second layout pattern. The first protruding portion exceeds the first edge of the first layout pattern.

Abstract: A multifunctional protective mask with sucking and whistling includes a mask body, a slit and a fixing section. The mask body includes folded first wrinkle and second wrinkle, and a splicing section formed at the junction of the first wrinkle and the second wrinkle. The slit is located between the second wrinkle and the splicing section. The fixing section fixes the first wrinkle, the splicing section and the second wrinkle. Therefore, the present invention can provide the user with many functions such as the convenience of inhaling tea, coffee, beverages, nasogastric tube feeding or whistling while wearing. At the same time, the mask has good bacterial and virus filtration efficiency (PFE/BFE) and closeness. The invention can be automatically produced, has a short process time, has many advantages such as low cost, easy commercialization and mass production, and benefits the society.

Abstract: A novel airtight protective mask comprises: a mask body sequentially having at least an outer layer, a middle layer and an inner layer; at least two airtight sheets; each one of the aright sheets comprising a fixation portion and a sealing portion extending from the fixation portion; the fixation portion configured to cover one side of the mask body and fixedly attached to the outer layer and the inner layer; the sealing portion arranged corresponding to a direction of the inner layer; two fixed attachment area sets, and each one of the fixed attachment area sets comprising an upper fixation area and a lower fixation area; the upper and lower fixation areas fused to the mask body corresponding to two upper and lower ends of the sealing portion respectively; and a lanyard set, comprising two lanyards; the two lanyards connected to the two sides of the mask body respectively.

Abstract: The present invention relates to a mask and an inflatable structure thereof. The inflatable structure which is provided in a mask's body comprises: a ventilation seat; a sleeving connection which is sleeved at one end of the ventilation seat and sandwiches the mask's body together with the ventilation seat, with the sleeving connection provided with a socket tube so that the mask's body, the ventilation seat and the socket tube are in air communication; an air-sealed hood which is connected to the sleeving connection and provided around the socket tube. By virtue of the structure in the present invention, the air flow can be effectively imported into the patient to significantly increase the survival rate of the patient.

Abstract: A face mask having an embedded nose pad, including: a mask body having an outer layer, a middle layer, and an inner layer sequentially; and a nose pad disposed on the outer layer, wherein the inner layer extends and doubles back to form an inner layer flap, and the nose pad is enclosed by the inner layer flap and the outer layer jointly, allowing a raised portion to be formed on the mask body and corresponding in position to the nose pad. Hence, the face mask effectively prevents users from inhaling unfiltered air and stops exhaled moisture from rising through the mask body, thereby not only precluding a leak through the nasal portion of the face mask but also preventing eyeglasses from fogging.

Abstract: The present invention relates to a mask and an inflatable structure thereof. The inflatable structure which is provided in a mask's body comprises: a ventilation seat; a sleeving connection which is sleeved at one end of the ventilation seat and sandwiches the mask's body together with the ventilation seat, with the sleeving connection provided with a socket tube so that the mask's body, the ventilation seat and the socket tube are in air communication; an air-sealed hood which is connected to the sleeving connection and provided around the socket tube. By virtue of the structure in the present invention, the air flow can be effectively imported into the patient to significantly increase the survival rate of the patient.

Abstract: A circuit for waking a microprocessor from a sleep mode and providing it with its microprocessor clock long enough for a refresh, direct memory access (DMA) or master cycle operation to be done by external circuitry. The clock signal is then removed from the microprocessor to put it back into the sleep mode, thereby conserving energy. A hold signal is provided to the microprocessor to cause the microprocessor outputs to be put into a tri-state, high impedance condition, and thus relinquish control of the external bus to the external refreshing circuitry.