Abstract: A one-component type polyurethane prepolymer composition comprises a reaction product formed through a reaction between reactants comprising (a) at least one polyisocyanate, and (b) a polyol blend comprising at least one bifunctional polyether polyol, wherein the bifunctional polyether polyol is a homopolymer of propylene oxide, homopolymer of butylene oxide, or copolymer of alkylene oxide, and has a number average molecular weight from 3000 g/mol to 9000 g/mol, and at least one trifunctional polyether polyol, wherein the trifunctional polyether polyol is a copolymer of alkylene oxide and end-capped with 10 wt % to 28 wt %, by the total weight of the trifunctional polyether polyol, of ethylene oxide, and has a number average molecular weight from 5000 g/mol to 8000 g/mol, wherein the bifunctional polyether polyol and the trifunctional polyether polyol are present in a parts by weight ratio from 4:1 to 2.

Abstract: Methods and apparatus for processing a substrate is provided herein. For example, a method for processing a substrate comprises depositing a silicide layer within a feature defined in a layer on a substrate, forming one of a metal liner layer or a metal seed layer atop the silicide layer within the feature via depositing at least one of molybdenum (Mo) or tungsten (W) using physical vapor deposition, and depositing Mo using at least one of chemical vapor deposition or atomic layer deposition atop the at least one of the metal liner layer or the metal seed layer, without vacuum break.

Abstract: An orthodontic appliance and uses thereof are disclosed. The first orthodontic appliance includes a shell-like body at least having a geometric structure allowing at least one tooth in a posterior region to move in a distal direction. The shell-like body is further provided with an auxiliary anchoring portion capable of absorbing a reaction force generated by the at least one tooth in the posterior region while moving in the distal direction. Provided between the shell-like body and the auxiliary anchoring portion is an auxiliary transmitting portion used for aiding transmission of the reaction force generated by the at least one tooth in the posterior region while moving in the distal direction.

Abstract: Methods and apparatus for filling features on a substrate are provided herein. In some embodiments, a method of filling features on a substrate includes: depositing a first metallic material on the substrate and within a feature disposed in the substrate in a first process chamber via a chemical vapor deposition (CVD) process at a first temperature; depositing a second metallic material on the first metallic material in a second process chamber at a second temperature and at a first bias power to form a seed layer of the second metallic material; etching the seed layer in the second process chamber at a second bias power greater than the first bias power to form an intermix layer within the feature comprising the first metallic material and the second metallic material; and heating the substrate to a third temperature greater than the second temperature, causing a reflow of the second metallic material.

Abstract: Tunnel defect detecting method and system using unmanned aerial vehicle (UAV) are provided, and the UAV is equipped with a light-emitting diode (LED) module, a camera, a laser radar, an ultrasonic distance meter and an inertial measurement unit (IMU). The method includes: collecting images in a tunnel based on the LED module and the camera to obtain a training image set; training by using the training image set to obtain a defect detecting model, collecting real-time tunnel images, detecting suspected defects to the real-time tunnel images by the defect detecting model, obtaining pose information of the UAV based on the camera, the laser radar, the ultrasonic distance meter and the IMU to control the UAV to hover. The method can realize accurate pose estimation and defect detection in the tunnel with no GPS signals and highly symmetrical inside.

Abstract: Disclosed is an unmanned aerial vehicle (UAV) positioning method based on a millimeter-wave radar, including a calibration stage and a positioning stage. The calibration stage includes: acquiring ground coordinates of the unmanned aerial vehicle; and extracting feature points from radar point cloud data and get the ground coordinates of the feature points. The positioning stage includes: acquiring radar point cloud data of a current frame and pre-processing; acquiring UAV motion data and fuse the data with radar point cloud data; extracting characteristic line segment from radar point cloud data; registering the characteristic line segment of the current frame with the characteristic line segment of the previous frame, and finding matching feature points and newly added feature points; and obtaining the ground coordinates of UAV and the ground coordinates of newly added feature points based on the ground coordinates of matched feature points on the map.

Abstract: Systems, apparatuses and methods may provide for encoder technology that selects, in response to a request from a client device, a first video stream from a first plurality of video streams dedicated to a first tile in video content and selects, in response to the request, a second video stream from a second plurality of video streams dedicated to a second tile in the video content. The encoder technology may also send the selected first and second video streams to a client device. Additionally, decoder technology may allocate a first decoder device to the first video stream and allocate a second decoder device to the second video stream. In one example, the first video stream and the second video stream include one or more different codec parameter values.

Abstract: Methods and apparatus for sensor selection for localization and tracking are provided. A method (300) performed at an access point (101, 101a, 101b, 101c, 901, 902, 903) comprises: determining, a detectability of the access point (101, 101a, 101b, 101c, 901, 902, 903) for localization for a target device (102), based on channel state information of a radio link between the target device (102) and the access point (101, 101a, 101b, 101c, 901, 902, 903) (302); and determining whether the access point (101, 101a, 101b, 101c, 901, 902, 903) is to be used for position estimation of the target device (102) or not based on the detectability (304). A localization server (103) may further eliminate access points (101, 101a, 101b, 101c, 901, 902, 903) at poor positions from position estimation, by using a predefined weighted-kernel approach.

Abstract: A crankshaft assembly, a compressor and a refrigeration device are provided. The crankshaft assembly has an eccentric shaft component, a spindle component and a main screw oil pump. The eccentric shaft component has an eccentric cavity, and the spindle component has a first cavity communicated with the eccentric cavity. A first through-hole and a second through-hole in a first spindle are each communicated with the first cavity. An outer surface of the first spindle is provided with a first spiral oil groove connecting the first through-hole and the second through-hole. An outer surface of the main screw oil pump is provided with a second spiral oil groove along its length direction, and a spiral direction of the second spiral oil groove is opposite that of the first spiral oil groove.

Abstract: An apparatus for holding a medical device includes: a device sheet perpendicular to the ground; and at least one pocket layer, including a first pocket layer, where the first pocket layer is configured as a single first pocket room in its entirety and has a length enabling the medical device to be laid in the first pocket room without coiling in the presence or absence of one or more suspension elements, and the at least one pocket layer has a structure in which an edge of the at least one pocket layer facing the one or more suspension elements is open and other edges thereof are peripherally attached to the device sheet.

Abstract: An exploiting method and device of marine facies natural gas hydrate. The exploiting method comprises the following steps: (1) after the construction of a vertical well, a fixed pipe is constructed, the exploiting well is set in the center of the fixed pipe, and the mixture is filled between the inner wall of the fixed pipe and the outer wall of the exploiting well; (2) the self-excited oscillating jet nozzle enters the exploiting well along the vertical well to the designated position through an orifice on the exploiting well and sprays the mixture, so that the mixture is broken evenly to form artificial fractures; (3) under the corresponding temperature, the hydrate decomposes to produce gas by depressurized exploiting; (4) the gas-liquid mixture exploited by the exploiting well is separated into liquid and gas in the gas-liquid separation device to collect liquid and gas.

Abstract: Embodiments of the disclosure provide a method, device and computer readable medium for transmission scheme. According to embodiments of the present disclosure, the communication device may transmit an initial message to a further communication device via an antenna in an omnidirectional mode if the transmitting power can be achieved by the antenna in the omnidirectional mode. The communication device may transmit the initial message to the further communication device via the antenna in a directional mode if the transmitting power cannot be achieved by the antenna in the omnidirectional mode. In this way, latency for initializing the connection may be reduced and the successful connections are guaranteed at the same time.

Abstract: A system for regulating online merchandise link activity. The system may comprise a memory storing instructions and at least one processor configured to execute the instructions. The instructions may comprise: maintaining a set of items for online link processing, the items being associated with a website; selecting a first item from the set of items; receiving an electronic request from a first affiliate system related to the first item; registering the first affiliate system as associated with the first item; generating an online link associated with the first item and the registered affiliate system; detecting an actuation of the online link, the actuation being associated with digital activity; and, based on the detected actuation and digital activity, permitting or denying the first affiliate system from operating the online link.

Abstract: A method for preparing quartz glass with low content of hydroxyl and high purity, includes providing silica powders including hydroxyl groups. The silica powders are dehydroxylated, which includes drying the silica powders at a first temperature, heating the silica powders up to a second temperature and introducing a first oxidizing gas including halogen gas, thereby obtaining first dehydroxylated powders, and heating the first dehydroxylated powders up to a third temperature and introducing a second oxidizing gas including oxygen or ozone, thereby obtaining second dehydroxylated powders. The second dehydroxylated powders are heated up to a fourth temperature to obtain a vitrified body. The vitrified body is cooled to obtain the quartz glass with low content of hydroxyl and high purity. The quartz glass prepared by the above method has low content of hydroxyl and high purity. A quartz glass with low content of hydroxyl and high purity is also provided.

Abstract: The invention provides a semiconductor crystal growth device comprising a furnace body; a crucible; a pulling device; a horizontal magnetic field applying device; and a deflector, being barrel-shaped and disposed above the silicon melt in the furnace body in a vertical direction, and the pulling device pulls the silicon ingot through the deflector in the vertical direction; wherein the bottom of the deflector has different thermal reflection coefficients at different positions, and the thermal reflection coefficient of the bottom of the deflector in the direction of the horizontal magnetic field is smaller than that in the direction perpendicular to the horizontal magnetic field. According to the semiconductor crystal growth device of the present invention, the temperature distribution inside the melt silicon and quality of the semiconductor crystal are improved.

Abstract: The embodiment of this present disclosure provides a control method of unmanned aerial vehicle (UAV) hovering in tunnel, which comprises the following steps: acquiring hovering information of hovering position of UAV; acquiring the position information of the current position of the UAV; determining flight parameters based on hovering information and position information. The flight parameters are used to control the UAV to move from the current position to the hovering position.

Abstract: An online monitoring device of 3D printing equipment includes a signal collection module, a signal processing module, a feature extraction module, a monitoring module and a knowledge base module. A vibration signal of a preset component of the 3D printing equipment is collected by a vibration sensor. The collected vibration signal of each preset component is converted from an analog signal to a digital signal and the spectrum characteristics are extracted. Based on the spectrum characteristics of each preset component, the operation state type of the preset component is obtained by a comparative analysis model. The knowledge base module is configured to store newly added samples and initial samples of the 3D printing equipment. The initial samples include spectrum characteristic information and corresponding fault category of known faults, and the newly added samples include spectrum characteristic information and corresponding fault category of new faults.

Abstract: The present disclosure provides a dental orthodontic appliance and a design method and a manufacturing method thereof. The dental orthodontic appliance includes a shell-like body, and the shell-like body is provided with a plurality of cavities for accommodating maxillary teeth, and the shell-like body is further provided with an upper palatal arch that reshapes a form of a dental arch. Two ends of the upper palatal arch are respectively and partially connected to positions of gingival margins or positions adjacent to the gingival margins on ligual sides in posterior regions of left and right sides of the shell-like body. When the shell-like body interacts with teeth, the upper palatal arch can induce buccolingual lateral amplification of maxillary palatal suture bone deposition by means of deformation, and teeth in the posterior regions move laterally buccolingually under an action of the shell-like body.

Abstract: This disclosure is directed to a universal interface for sensor devices. Applications executed in a device may interact with sensor devices via a universal interface. For example, the device may act as a gateway allowing Internet of Things (IoT) devices to interact with at least one resource external to the environment in which the IoT devices operate. The device may comprise at least memory circuitry to store at least a virtual file system and at least one application. The virtual file system may provide a programmatic interface through which at least one sensor device may be accessible to the at least one application. Processing circuitry in the device may execute an application from those stored within the memory circuitry. The application, when executed, may cause interconnect circuitry also in the device to at least one of transmit instructions to, or receive data from, a sensor device utilizing the virtual file system.