Abstract: A transformer includes a front stage circuit and a rear stage circuit. As a front stage circuit, a switch series unit, which is connected in parallel to a power supply, includes odd-numbered switches and even-numbered switches alternately turned ON. Mutual connection points of the respective switches and points at both ends of the switch series unit are regarded as m nodes in total. Capacitors are provided on at least one of a first electrical path combining odd nodes to lead them to a first output port, and a second electrical path combining even nodes to lead them to a second output port. The capacitors are present so as to correspond to at least (m?1) nodes. The rear stage circuit includes an element series unit, which is composed of a pair of semiconductor elements connected in series to each other for conducting operations of mutually opposite polarities, and necessary inductors.

Abstract: A front stage circuit of a transformer includes a switch series unit, capacitors, and a ground electrical path. The switch series unit, connected in parallel to a power supply, includes odd-numbered/even-numbered switches configured to be alternately turned ON. Assuming that mutual connection points of the switches and points at both ends of the switch series unit are m nodes in total, and one of the points at the both ends is a ground node, the capacitors are provided on at least one of a first electrical path that combines odd nodes and leads them to a first output port, and a second electrical path that combines even nodes and leads them to a second output port, and the capacitors are present to correspond to (m?1) nodes excluding the ground node. The ground electrical path connects the ground node directly to the first output port without an interposed capacitor.

Abstract: A biomedical sensor and sensor system for analysis of breath are disclosed. The biomedical sensor can include two layers arranged to swell or contract in a plane perpendicular to an axial direction while being restricted from swelling in the axial direction. The biomedical sensor includes resistance connections to allow measurement of the resistance of each layer and a combined resistance of both layers. The sensor system can include one, two, or three or more sensors, each having a pair of electrodes separated by a gap and one or more layers of composite material located within the gap. the sensor system includes resistance circuits configured to measure changes in resistance between the electrodes. A polypyrrole/polymethyl methacrylate/polyethylene glycol composite material and method of making the same are disclosed.

Abstract: A high-strength dual-scale structure titanium alloy, a preparation method therefor, and an application thereof, belonging to the technical field of alloy processing. The composition system of the titanium alloy is Ti—Nb—Cu—Co—Al, the atomic percentage of the various elements being 58˜70% Ti, 9˜16% Nb, 4˜9% Cu, 4˜9% Co, and 2˜8% Al. The microstructure comprises a dual-scale coexistence of micro-crystal isometric bcc ?-Ti and ultra-fine crystal isometric bcc ?-Ti, and a dual-scale coexistence of micro-crystal strip fcc CoTi2 and ultra-fine crystal isometric fcc CoTi2, or an ultra-fine crystal strip fcc CoTi2 twin crystal is distributed along a boundary of a dual-scale substrate, the dual-scale substrate being a nano needle-shaped martensite ?? phase dispersed within micro-crystal bcc ?-Ti. The mechanical properties of the titanium alloy are significantly improved, and the titanium alloy may be used in fields such as aerospace and aviation, weaponry and sports equipment.

Abstract: A method for improving resistance of a fusion reactor inner wall to plasma irradiation by using lamination structure comprises: making a material for facing plasma into multiple metal sheets, laminating the multiple metal sheets together according to a direction perpendicular to a wall surface, and combining the laminated multiple metal sheets with a copper substrate. The method relates to the field of nuclear applications, and is applicable to a plasma-facing surface on an inner wall of an apparatus for conducting a fusion reaction by using hydrogen isotopes. Not only does the method reduce aggregation of hydrogen, helium, and isotopes thereof, and the like, under a surface layer of a tungsten-based material, greatly reducing a blistering phenomenon on a surface thereof, but also reduces thermal fatigue cracking damages.

Abstract: Diaphragm paper, and a preparation method and an application thereof. The diaphragm paper comprises a first layer, a second layer, and a third layer, wherein the second layer is located between the first layer and the third layer; the first layer and the third layer are loose layers, of which the average aperture is larger than 10 ?m and the basis weight is 5 to 30 g/m2; and the second layer is a compact layer, of which the average aperture is smaller than 5 ?m and the basis weight is 2 to 15 g/m2. The compact layer has small aperture and good insulating performance, and is capable of effectively insulating a positive electrode and a negative electrode. The loose layers have good liquid permeability and electrolyte absorptivity, and can guarantee the discharge performance of a battery. The material is further advantageous in having good dimensional stability and being thin, so that a battery can achieve high capacity.

Abstract: A driver circuit provides power from a power source to a load. The driver circuit includes a surge protector, an input stage (e.g., full wave rectifier), a controller, an overvoltage protection circuit, and an output stage (e.g., a half bridge inverter). The input stage receives power from the power source and provides a direct current (DC) power rail. The controller operates the output stage to provide power from the DC power rail to the load. The overvoltage protection circuit shuts down the controller when the DC power rail exceeds a predetermined voltage. This ceases operation of the output stage, protecting the output stage from damage while the DC power rail is above the predetermined voltage.

Abstract: A concrete mixing carrier, comprising a vehicle chassis and a mixing drum provided thereon. A drum housing of the mixing drum is cubic, supported horizontally on the vehicle chassis, and able to form an unloading state where a front portion is higher and a rear portion is lower; the mixing drum forms a closed drum housing; a feed inlet and a discharge outlet are respectively provided on a rear end plate; a rotary inner drum formed by splicing movable blades is provided in the drum body, and adjacent movable blades have therebetween a movement margin for rotation; each strip-shaped movable blade is supported at both ends by paired rollers respectively; stirring blades overhang towards inside of the drum body, backs of back plates are provided with drive racks, and drive gears, mutually engaged with the drive racks, are provided at corresponding positions of the drum body using a supporting bracket.

Abstract: A driver circuit includes a combined current and voltage control circuit for driving a light emitting diode (LED) load. The driver circuit includes an isolation transformer having primary, secondary, and auxiliary windings. A primary side circuit is coupled to the primary winding and includes a power factor controller and a switch. The power factor controller controls an output current to the LED load by controlling an operational state of the switch. A secondary side circuit is coupled to the secondary winding. The secondary side circuit includes a proportional and integration (PI) control portion which outputs a control signal. A combined voltage and current control circuit is coupled to the auxiliary winding and includes an optocoupler coupled to the power factor controller and to the PI control section. The combined voltage and current control circuit transmits a control signal from the PI control section to the power factor controller.

Abstract: A charge wake-up circuit for Battery Management System (BMS). The circuit includes the charge-discharge module and charge detection module. The charge-discharge module contains Charger W, load R1, first switch K1, second switch K2, battery E, charge MOSFET M1 and discharge MOSFET M2. The charge detection module contains inductance L 1, first diode D1, second diode D2, first resistor R2, second resistor R3, third resistor R4, fourth resistor R5, fifth resistor R6, sixth resistor R7, seventh resistor RS, first capacitor C1, second capacitor C2, third capacitor C3, first transistor Q1, second transistor Q2 and photocoupler U.

Abstract: A driver circuit of a light fixture includes a half-bridge inverter, a resonant tank circuit, an isolating transformer, an output rectifier, and a controller. The half-bridge inverter provides an alternating current signal to the resonant tank circuit. The resonant tank circuit includes a resonant inductor, a resonant capacitor, a first clamping diode, and a second clamping diode. The clamping diodes limit the voltage of the resonant capacitor to a power rail voltage and a ground voltage. The isolating transformer is connected to the resonant tank circuit. The controller senses current provided to the light source and adjusts a switching frequency of the half-bridge inverter to maintain the sensed current at a target current. The driver circuit operates as a constant current source with a self-limited output voltage determined as a function of the voltage of the power rail and the turns ration of the isolating transformer.

Abstract: A system for evaluating drainage condition of a pavement surface is disclosed. The system may include: a spray assembly configured to spray a liquid over the pavement surface, an image capturing device configured to capture consecutive images of the pavement surface at predetermined intervals, and an image processing unit coupled with the image capturing device.

Abstract: A drum-type wide-frequency piezoelectric power generation apparatus may include a protective layer pasted on piezoelectric layer through epoxy resin glue or other conductive adhesives. The piezoelectric layer is pasted on the base layer through epoxy resin or other conductive adhesives. One side of piezoelectric vibrators are fixed on the end cap “a” through the clamp and are away from a first permanent magnet. The end cap “a” provided an octagonal boss “a”. There are bosses “b”, “c”, “d” on the surface of boss “a”. The four piezoelectric vibrators are fixed on four symmetry planes of bosses “a”, “b”, “c”, “d”. The four planes of end cap “a” are fixed on piezoelectric vibrator corresponding to four straight slots respectively, which are used to fix the clamp. The auxiliary magnet is closer to the center of end cap “b” than second permanent magnet. Each of second permanent magnets has a corresponding auxiliary magnet. The first second permanent magnets are mutually exclusive.

Abstract: A medical apparatus for standing aid comprising a backrest (4) that has at least one side thereof provided with a crank rocker mechanism that comprises a crank mechanism (1), a triangular linkage mechanism (2), and a rocker mechanism (3), the crank mechanism (1) being rotatably connected to the triangular linkage mechanism (2) such that an included angle between a second driven link (BE) of the triangular linkage mechanism (2) and the crank mechanism (1) is always smaller than 90°, and the crank mechanism (1) driving the triangular linkage mechanism (2), the rocker mechanism (3) and the backrest (4) connected to the triangular linkage mechanism (2) to perform interactive movement repeatedly along a predetermined curve trajectory in response to a driving force coming from a drive effect of a driving unit (100), so that the backrest (4) connected to the second driven link (BE) assists a trainee in standing up repeatedly by obliquely supporting the trainee's waist.

Abstract: Embodiments relate to devices and/or methods for measuring three-dimensional contact stiffness of spur gear based on rough surfaces. A hexagonal mesh is used for partitioning, and areas of each square meshes are identical with respect to tooth surfaces. The embodiments include calculating contact pressure distribution of smooth tooth surface based on a finite element method and extracting node pressure of contact area Pi; and calculating contact stiffness of gear surface. Measurement herein is more precise and avoid disadvantages generated by hertz theory and the free-sliding interface. Gear stiffness properties and calculation methods are influenced by roughness parameters during rough tooth surface contacting processes. The embodiments use a finite element 3D contact stiffness calculation model, which is more accurate than former 2D calculation model or calculation formula.

Abstract: The invention relates to an anatonnical kidney phantom with calyces for drainage training in interventional radiology. The anatonnical kidney phantom simulator comprises a housing filled with the surrounding material and an anatomical kidney phantom placed into surrounding material. The kidney phantom has a number of cavities simulating parts of the kidney for drainage training in interventional radiology for example the cavities are simulating kidney calyces. The cavities are connected by channels and connecting pipe with outer reservoirs filled with the different colors or the x-ray opaque contrast liquids.

Abstract: A device and a process for producing undecylenic acid methyl ester using methyl ricinoleate as raw material are provided. The device comprises a feed pump, a raw material pre-heater, a microwave catalytic reactor, a microwave generator, a temperature controller and an infrared sensor, a condenser, a product tank and a discharge pump. The feed pump is connected with the raw material pre-heater, which is connected with the inlet of the microwave catalytic reactor. The outlet of the microwave catalytic reactor is connected with the condenser, which is connected to the product tank and the discharge pump. The microwave catalytic reactor is located in the microwave generator, which is connected with the temperature controller and the infrared sensor. The process is as follows: high-purity methyl ricinoleate, used as the raw material, is converted to methyl undecene and heptaldehyde by microwave-assisted pyrolysis process, followed by isolation and purification to produce methyl undecene.

Abstract: Technologies are generally described herein to detect non-volatile write request sequences. A write request is received to write to a solid-state device that includes the non-volatile memory. A determination is made as to whether the write request is part of a non-volatile write request sequence or is not part of the non-volatile write request sequence. In response to determining that the write request is part of the non-volatile write request sequence, the write request is associated with the non-volatile write request sequence. In response to determining that the write request is not part of the non-volatile write request sequence, the data associated with the write request is written to a cache that is coupled to the non-volatile memory. The data associated with the non-volatile write request sequences may be written directly to the non-volatile memory.

Abstract: A bobbin provides secure attachment of a magnetic component to a printed circuit board. The circuit board includes a set of slotted apertures and a set of tubular apertures. The bobbin includes at least two pin rails and a plurality of standoffs proximate each pin rail. L-shaped pins are attached to one of the pin rails. Straight pins are attached to the other pin rail. The component further includes a core, and at least one winding. The L-shaped pins are shaped to pass through and slide within the set of slotted apertures. The L-shaped pins engage the bottom surface of the circuit board when the straight pins are inserted through the set of tubular apertures (i.e., in a secured position). In the secured position, the magnetic component is held in place against the top surface of the circuit board and provides a soldering area for mounting on the bottom surface.

Abstract: Provided are a rotary device for fluid power generation and a fluid power generation device that are capable of converting the kinetic energy of a fluid to an electric energy. By utilizing a longitudinal vortex as a driving force, a rotary body such as a cylinder as a high-strength and tough wing-shaped member can be rotated, and power can be efficiently generated in a wide range of flow rate without letting the longitudinal vortex disappear even if the flow rate changes in a wide range. This rotary device for power generation includes a rotary body 3; and a wake body 8 that is a distance away from the rotary body 3 toward the downstream side of a flow direction 10 of the fluid, and has at least one crossover section at which the wake body 8 intersects with the rotary body 3.