Abstract: A method for recycling waste polyester, in particular to a method for recycling waste polyester by a modified alcoholysis method to recycle waste polyester to prepare dimethyl terephthalate (DMT), is provided and belongs to waste polyester recycling technology field. The waste polyester after dewatering and deoxygenation treatment is used as a raw material, in the step of feeding in melted state the alcoholysis agent is added in the melted waste polyester for preliminary alcoholysis, and the alcoholysis agent is ethylene glycol. On one hand, alcoholysis reaction occurs when the waste polyester raw material are melted, and at the same time, the viscosity of the melted material is reduced. Thus, the melted material remains melted at the alcoholysis temperature and is not easy to solidify again after entering the alcoholysis tank, ensuring that the alcoholysis is carried out under homogeneous conditions.

Abstract: A method for depositing a metal layer on a wafer is disclosed. A PVD chamber is provide having therein a wafer chuck for holding a wafer to be processed, a target situated above the wafer chuck, a magnet positioned on a backside of the target, and a DC power supply for supplying a DC voltage to the target. The target is a metal or a metal alloy having ferromagnetism property. A paste process is performed to the PVD chamber. The paste process includes sequential steps of: admitting a working gas into the PVD chamber; and igniting the working gas in cascade stages. The wafer is then loaded into the PVD chamber and positioned onto the wafer chuck. A deposition process is then performed to deposit a metal layer sputtered from the target onto the wafer.

Abstract: The invention relates to the field of pharmaceutical synthesis, in particular to a preparation method of (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol derivatives and their intermediates. The preparation method is carried out starting from compound Formula A1. In the preparation of (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol derivatives, the chirality was constructed by enzymatic method, and the products were prepared with high optical purity. The preparation method can be used to produce the key intermediates of (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol of darunavir commercially, which is a very economical route suitable for industrial production.

Abstract: A PPTC assembly may include a PPTC component, having a trip temperature, and further comprising a first temperature coefficient of resistance, in a low temperature range below the trip temperature. The PPTC assembly may include a resistive component, disposed in electrical contact with the PPTC component on a first side of the PPTC component, the resistive component comprising an electrical conductor, and having a second temperature coefficient of resistance in the low temperature range, less than the first temperature coefficient of resistance. The PPTC component may include a first electrode, electrically coupled to the first side of the PPTC component, and a second electrode, electrically coupled to the second side of the PPTC component, where the PPTC component and the resistive component are arranged in electrical series between the first electrode and the second electrode.

Abstract: A polymeric positive temperature coefficient (PPTC) device including a PPTC body, a first electrode disposed on a first side of the PPTC body, and a second electrode disposed on a second side of the PPTC body, wherein the PPTC body is formed of a PPTC material that includes a polymer matrix and a conductive filler, wherein the conductive filler defines 20%-39% by volume of the PPTC material.

Abstract: A PPTC device including a PPTC body, a first electrode, disposed on a first side of the fuse component, a second electrode, disposed on a second side of the PPTC body, wherein the PPTC body comprises a polymer matrix and a conductive filler.

Abstract: A polymeric positive temperature coefficient (PPTC) device including a PPTC body, a first electrode disposed on a first side of the PPTC body, and a second electrode disposed on a second side of the PPTC body, wherein the PPTC body is formed of a PPTC material that includes a maximum of 65% by volume of a conductive filler, wherein 10%-39% by volume of the PPTC material is a conductive ceramic filler and wherein the rest of the conductive filler includes at least one of carbon and a metallic filler.

Abstract: A bit rate control method device obtains a bit rate control mode and coding control parameters of a current short period in a long period, determines a frame-level coding parameter of the current short period, and transmits the frame-level coding parameter to an encoder. Second bit stream information is obtained and statistical analysis is performed which includes complexity information of the current video frame, the number of the encoded bits in the current short period, and coding quality information of the current short period, so as to encode a video frame of the next, adjacent short period by calculating a frame-level coding parameter of the next, adjacent short period. By the present solution, the storage space is allocated reasonably under the condition that the image satisfies a certain quality.

Abstract: A polymer positive temperature coefficient (PPTC) material. The PPTC material may include a polymer matrix, a conductive filler, and a thermal stabilizer.

Abstract: A temperature sensing tape including a flexible, electrically insulating substrate, a plurality of temperature sensing elements disposed on the substrate, each temperature sensing element including a first electrode and a second electrode arranged in a confronting, spaced-apart relationship to define a gap therebetween, and a variable resistance material disposed within the gap and connecting the first electrode to the second electrode, wherein the first electrode of at least one of the temperature sensing elements is connected to the second electrode of an adjacent temperature sensing element by a flexible electrical conductor.

Abstract: Medical devices and methods for making and using medical devices are disclosed. An example medical device may include a catheter shaft. An expandable balloon may be coupled to the catheter shaft. The balloon may be capable of shifting between a folded configuration and an expanded configuration. A support structure may be coupled to the balloon. The support structure may be capable of shifting the balloon toward the folded configuration. A plurality of elongate flexible electrode assemblies may be disposed on the balloon. The elongate flexible electrode assemblies may be oriented at an angle relative to a longitudinal axis of the balloon.

Abstract: A fuse device including a fuse component, a first electrode, disposed on a first side of the fuse component, a second electrode, disposed on a second side of the fuse component, and a phase change component, disposed in thermal contact with the fuse component. The fuse component may comprise a fuse temperature, wherein the phase change component exhibits a phase change temperature, the phase change temperature marking a phase transition of the phase change component, and wherein the phase change temperature is less than the fuse temperature.

Abstract: A method for manufacturing an insulated conductive material, the method including providing a wire, applying a masking material to one or more regions of the wire, coating regions of the wire other than the one or more regions with an insulating material by, electrically charging the wire with a first charge polarity, providing a medium of electrically charged insulating material particles that are charged with an opposite polarity, passing the charged wire through the medium, whereby the insulating material particles bind areas of the conductive material other than the one or more regions, curing the insulating material particles, and applying a solvent to the masking material to thereby remove the masking material, wherein the cured insulated material particles are substantially unaffected by the solvent.

Abstract: Electrical transient materials are disclosed. Furthermore, methods to provide electrical transient materials are disclosed. In one implementation, an apparatus includes an electrical transient material; and conductive particles disposed in the electrical transient material, at least one or more of the conductive particles have an irregular shape.

Abstract: Composite fiber reinforced balloons for medical devices are prepared by applying a web of fibers to the exterior of a preformed underlayer balloon, encasing the web with a matrix material to form an assembly, and inserting the assembly into a preformed outer layer balloon to form the composite balloon.

Abstract: Disclosed is a catalyst component for olefin polymerization. The catalyst component comprises magnesium, titanium, halogen and an internal electron donor. The internal electron donor includes an imine compound with a ketone group as shown in Formula I. Disclosed further is a method of preparing the catalyst component, and a catalyst for olefin polymerization containing the catalyst component. When the catalyst is used in olefin polymerization reaction especially propene polymerization reaction, the catalyst has a high long-term activity and good hydrogen response, and the obtained polymer has characteristics of an adjustable isotactic index and a relatively wide molecular weight distribution.

Abstract: A novel method for strengthening and reinforcing ancient books is provided. Such treatment method comprises: first placing the ancient books to be treated in a closed strengthening and reinforcing device; after sealing, performing dehumidification operation and vacuumizing operation on system in sequence to maintain the system dry; and after the system is stable under negative pressure, turning on a fan set, directly delivering a strengthening and reinforcing powder to the strengthening and reinforcing device via a gas pipe, or atomizing a strengthening and reinforcing solution through a ultrasonic atomizer and then delivering the atomized solution to the strengthening and reinforcing device via the gas pipe, so that the ancient books to be treated absorb the strengthening and reinforcing agent sufficiently and evenly; and meanwhile monitoring pH value and humidity of the ancient books, thereby implementing strengthening and reinforcement of the ancient books.

Abstract: A novel device for deacidifying, reinforcing and strengthening ancient books is provided. The device includes a double-open front door, a fan set, a dehumidifier, a vacuum pump, a light, a middle partition, a gas pipe hole, a rear panel, an ultrasonic atomizer, a gas pipe and a pulley track. The double-open front door is provided on one side face of the device. The middle partition divides the device into an upper part and a lower part, bottom faces of the upper part and the lower part are each provided with the fan set. The dehumidifier, the vacuum pump and the ultrasonic atomizer are arranged at an external surface of the rear panel opposite the double-open front door. The gas pipe locates at and runs through an upper part of the middle partition, and that section of the gas pipe is provided with the gas pipe hole The gas pipe is connected with the ultrasonic atomizer.

Abstract: A bit rate control method and device is disclosed. The method comprises: obtaining a bit rate control mode and coding control parameters of a current short period in a long period, determining a frame-level coding parameter of the current short period, and transmitting the frame-level coding parameter to an encoder; obtaining second bit stream information sent by the encoder; performing statistical analysis according to the second bit stream information to obtain statistical information including complexity information of the current video frame, the number of the encoded bits in the current short period, and coding quality information of the current short period; when the long period has not ended and if the current short period has ended, obtaining a period length of the current short period, the preset bit rate control parameters and the statistical information, and determining an average bit rate.