摘要:
Disclosed are fiber reinforced composite substrates comprising a polymeric matrix and one or more woven or non-woven para-aramid or fiberglass fabrics, sheets, or papers, said polymeric matrix consisting essentially of one or more cross-linked copolymers of monovinyl aromatic hydrocarbons and conjugated dienes useful for printed circuit boards and cards suitable for use in high frequency circuits.
摘要:
A desktop computer has a pedestal, a front housing, a motherboard, a display, and a rear cover. The pedestal is used to support the desktop computer on a desk. The bottom of the front housing is pivotally mounted on the pedestal and tilt-able in a forward-backward direction. The front housing has a front panel facing a user, a top panel horizontally fixed on a top edge of the front panel, and a bottom panel horizontally fixed on a bottom edge of the front panel. The display is fixed vertically on a front side of the front panel. The desktop computer combines the display with the computer housing so as to decrease the volume and simplify the structure. Furthermore, since the display is detachable fixed on the computer housing, the maintenance and the replacement of the display are easier and feasible.
摘要:
A method of fabricating trench power MOSFET is described. A first etching step is performed on a substrate to form a plurality of trenches and the substrate has a first doped region and a second doped region and serves as a drain region. A gate oxide layer and a polysilicon layer are then sequentially formed on the second doped region to create a gate region. Subsequent performance of a second etching step utilizes a mask layer to overlap the polysilicon layer. A portion of the second doped region is exposed and the exposed portion defines a base region. The polysilicon layer is etched to expose the gate oxide layer and the base region is simultaneously etched to remove a portion of the second doped region to expose the first doped region for forming an aligned source region. A contact region in the source region is finally formed to fabricate the trench power MOSFET.
摘要:
Scopolamine is a folksy cholinergic antagonist, and is used by parasympathetic nerves in autonomic nervous neurons as an anti-motion sickness drug or an anti-emesis drug. Since the human body most effectively absorbs this drug through the postauricular skin, the drug is administered by postauricular transdermal resorption patch. The penetrability of drug is increase by adding a dermal penetrative enhancer, because the penetration ability of patch-administered drugs is usually decreased by the penetrative blockade at dermal horny layers. The present invention discloses a penetration enhancer to increase dermal absorption and penetration of the cholinergic antagonist. The present invention finds that polyethylene and amide enhance penetration, about 2.2-2.8 fold. In accordance with the present invention, a penetration enhancer is added to the formulations of transdermal patch to increase the human body's absorption of scopolamine.
摘要:
The present invention relates to an apparatus and a process for a half-cell structure to make a hexagonal-cell honeycomb core. The structure has a plurality of peaks and valleys and a diagonal surface between each consecutive peak and valley. The apparatus comprises a stack holder for stacking the structure so that as one sheet is placed on top of a stack comprising at least one sheet, the peaks of one sheet contact the peaks of an adjacent sheet. The apparatus also comprises an air blower disposed beneath the top of the stack for reducing the air pressure surrounding the stack to a pressure below the air pressure on the top of the stack, thereby pressing the layers together to form the core. The present invention also relates to a transfer head and a process for holding a half-cell structure. The transfer head comprises a plurality of support bars for supporting the half-cell structure and at least one space formed between each support bar, where the width of each space is about the distance between adjacent valleys of the structure, and the depth of the space is greater than the height of the peaks.
摘要:
The present invention relates to an apparatus and a process for applying at least one adhesive component to a honeycomb half-cell structure. The half-cell structure has a plurality of peaks and valleys on each side thereof and a diagonal surface between each consecutive peak and valley. The apparatus comprises a first and second back-up roll and a first and second gravure roll. The first and second gravure rolls are disposed in a bath of a first adhesive component and a second adhesive component, respectively. Each of the first and second back-up rolls includes a plurality of spaced bars. The peaks of the half-cell structure face away from the bars of each respective back-up roll, and the peaks on the other side of the half-cell structure contact each respective first and second gravure roll, so that the first adhesive component contacts the peaks on the one side and the second adhesive component contacts the peaks to apply the first and second adhesive components to the half-cell structure.
摘要:
A take-off apparatus and method for unmanned aerial vehicle without landing gear includes an unmanned aerial vehicle, a carrier, a lock/release mechanism, a lift or airspeed sensing module, a signal processing module and a release motion sensing module. The lock/release mechanism locks the unmanned aerial vehicle onto the carrier and controllably releases the unmanned aerial vehicle from the carrier. The lift or airspeed sensing module senses an overall lift or airspeed of the unmanned aerial vehicle. When the lift or speed value of the unmanned aerial vehicle is greater than a predetermined threshold, it drives the lock/release mechanism into an unlocked state so that the unmanned aerial vehicle is released from the carrier and takes off more accurately and successfully.
摘要:
Compounds and pharmaceutical compositions containing such compounds having formula I are provided: where R1, R2a, R2b, R3, R4, and R5 are as defined herein. The compounds and pharmaceutical compositions thereof are useful for the prevention and treatment of a variety of conditions in mammals including humans, including anxiety and mood disorders such as depression.
摘要:
An electronic device is provided, including a main body, a bottom shell, and an electrical connection port. The bottom shell is pivotally connected to the main body, and the electrical connection port is disposed on the bottom shell. When the bottom shell is in a closed position relative to the main body, the electrical connection port is covered by the main body. When the bottom shell rotates from the closed position to an opened position relative to the main body, an opening is formed between the main body and the bottom shell, and the electrical connection port is exposed to the opening.
摘要:
Provided is a film having a thickness of less than 500 μm comprising a polymer and a plurality of surface-modified hexagonal boron nitride particles dispersed therewithin. The polymers can be polyimide or epoxy. A process for preparing the film by casting is provided.