Abstract: A method and system for eliminating the low-frequency oscillation between generators. By way of measuring the absolute rotor angle of a generator and controlling the rotor rotational speed, the absolute rotor angles obtained through measurement are the same when each GPS pulse per second signal arrives. The absolute rotor angles are angles of the internal potential Eq of the generator leading a GPS reference vector. Through the absolute rotor angle, zero steady state error control of the frequency and the rotor angle is achieved and the position of the generator rotor can remain unchanged in the PPS determined rotating coordinate system, thus suppressing the low-frequency oscillation better even without the need of remote measurement and achieving automatic local balance of active power during variation of loads. Accordingly, the power fluctuation on transmission lines is decreased while safe and stable operation of a large-scale interconnected power grid is achieved.

Abstract: A digital credential is generated for a user device. The digital credential is transmitted to the user device via an optical wireless communication access point (OWC AP). The user device is located in a coverage area of the OWC AP. The digital credential is provided to a wireless local area network (WLAN AP) associated with the OWC AP for authentication of a request from the user device to access the WLAN.

Abstract: The invention relates to the field of electronic information technology and discloses lightweight bone conduction Bluetooth glasses, including glasses frames, glasses legs, glasses feet, a nose bridge and nose pads, wherein a lithium battery and a Bluetooth circuit board are set within the glasses legs, bone conduction speakers are set within both glasses feet, a microphone is set within the glasses legs or on the nose bridge or the nose pads, conducting wires are set within the glasses frames, the glasses legs and the glasses feet, and the microphone, the lithium battery, the Bluetooth circuit board and the bone conduction speaker are connected through the conducting wires. The bone conduction Bluetooth glasses of the invention are similar to ordinary glasses, and the user can answer the call without taking a mobile phone out, thus freeing both hands and ears, hearing and speaking clearly, protecting privacy, and reducing radiation.

Abstract: There is provided a process of treating a heavy hydrocarbon-comprising material, comprising: contacting a feed material with at least a catalyst material within a contacting zone to effect generation of a total product such that a contacting zone material is disposed within the contacting zone and consists of the catalyst material and a feed/product-comprising mixture comprising the feed material and the total product, wherein the feed/product-comprising mixture includes a Conradson carbon residue content of at least 12 weight percent, based on the total weight of the feed/product-comprising mixture, and also includes an asphaltene content of less than two (2) weight percent, based on the total weight of the feed/product-comprising mixture, and wherein the feed material includes deasphalted heavy hydrocarbon-comprising material.

Abstract: A digital credential is generated for a user device. The digital credential is transmitted to the user device via an optical wireless communication access point (OWC AP). The user device is located in a coverage area of the OWC AP. The digital credential is provided to a wireless local area network (WLAN AP) associated with the OWC AP for authentication of a request from the user device to access the WLAN.

Abstract: A digital credential is generated for a user device. The digital credential is transmitted to the user device via an optical wireless communication access point (OWC AP). The user device is located in a coverage area of the OWC AP. The digital credential is provided to a wireless local area network (WLAN AP) associated with the OWC AP for authentication of a request from the user device to access the WLAN.

Abstract: A photographing method and device are disclosed. The photographing method includes the steps: dividing a photosensitive area of a photosensitive element into at least two subareas; adjusting photosensitive parameters of at least one subarea; and performing photographing according to photosensitive parameters of each subarea of the photosensitive element. In the technical scheme of the present disclosure, by dividing the photosensitive area of the photosensitive element into a plurality of subareas, each subarea may be controlled independently, and especially photosensitive parameters of each subarea may be adjusted respectively, it is equivalent to a controllable optical filter, which is based on to perform photographing according to the photosensitive parameters of each subarea of the photosensitive element, so that a photograph obtained by photographing has a brighter color, richer details and a clearer image, which enhances the photographing effect and improves the user experience.

Abstract: A shooting method, a shooting device and a computer storage medium. The shooting method comprises: continuously collecting images; reading the collected images and identifying a light painting region in the currently read image; extracting the light painting region and superposing the light painting region on a foundation image at a corresponding position to perform image synthesis and generate a synthesized image, and using the synthesized image as the foundation image for the next time of image synthesis; capturing the synthesized image and performing coding processing on the captured synthesized image; and converting image data after the coding processing into video file after the shooting is completed.

Abstract: An acoustic capture device includes an acoustic transducer, an acoustic detector, an analog-to-digital converter, and a processing element. The acoustic transducer captures an acoustic wave to generate an analog signal. The acoustic detector detects, according to the analog signal, a specific event to generate a trigger signal. The analog-to-digital converter converts the analog signal to generate a digital signal. The processing element receives the trigger signal to execute a control process. The control process includes: analyzing the digital signal to determine ambient information; determining a first set of parameters of the acoustic detector according to the ambient information; performing a control information protocol to adjust the acoustic detector according to the first set of parameters; and performing, according to the ambient information, an enhancement processing on the digital signal to generate an enhanced digital signal.

Abstract: A computer implemented method for detecting input gesture events on a touchscreen of an electronic device and for unlocking the electronic device is disclosed. The method may include displaying, while the electronic device is in a locked state, a plurality of guidance lines on the touchscreen of the electronic device, detecting, during an input gesture event, guidance line crossings and calculating a number of guidance line crossings detected during the input gesture event. The method may also include converting a calculated number of detected guidance line crossings into at least one password digit, comparing a sequence of password digits to a stored password in the electronic device and unlocking, in response to comparing the sequence of password digits to the stored password, the electronic device.

Abstract: A shooting method and a shooting device are disclosed. In general, the shooting method includes the following steps: continuously capturing images; reading a captured image of the captured images and searching in the current read image according to a predetermined criteria to identify a Light Painting region of the current read image; and extracting the Light Painting region and merging the Light-Painting region and a corresponding position of a base image to achieve a synthesized image, and using the synthesized image as a base image for next image synthesis. Since only the Light Painting region is merged and synthesized, and other light spot regions in the image would not appear in the synthesized image, and it would not contaminate the synthesized image, a clear Light Painting trajectory can be recorded in the finally synthesized image.

Abstract: A computer implemented method for detecting input gesture events on a touchscreen of an electronic device and for unlocking the electronic device is disclosed. The method may include displaying, while the electronic device is in a locked state, a plurality of guidance lines on the touchscreen of the electronic device, detecting, during an input gesture event, guidance line crossings and calculating a number of guidance line crossings detected during the input gesture event. The method may also include converting a calculated number of detected guidance line crossings into at least one password digit, comparing a sequence of password digits to a stored password in the electronic device and unlocking, in response to comparing the sequence of password digits to the stored password, the electronic device.

Abstract: A computer implemented method of storing data in at least one mobile node according to mobile node location may include identifying a first qualified mobile node and determining a first geographic position of the first qualified mobile node. The method may include determining a user geographic position of a user device, determining whether the first geographic position is within a first proximity relative to the user device, and causing storage of a first data portion in the first qualified mobile node in response to determining that the first geographic position is within the first proximity.

Abstract: Disclosed are a photographing method and apparatus. The photographing method includes the steps as follows. Images are continuously acquired during photographing, a currently acquired image is synthesized with a current basic image into a synthesized image, and the synthesized image is taken as a basic image in next synthesis. Synthesized images during photographing are cached. A synthesized image is extracted, according to an operation instruction from a user, from the cached synthesized images to serve as a current basic image, so as to return a photographing progress to a photographing state displayed by the extracted synthesized image. Thus, a certain part of the photographed content is erased or deleted equivalently, light-painted images can be modified in real time, a user may complete one light-painting action with multiple pauses accordingly, a more perfect and complex effect is achieved, the light-painting creation effect is improved, and the user experience is improved.

Abstract: A pressing device employed to press protection blocks to a workpiece, includes a seat, a transmission assembly and four pressing assemblies. The transmission assembly includes a connecting rod, a rotation shaft, a gear, and a transmission member. The connecting rod is pivotally connected to a bottom of the seat and forms racks on one end. The rotation shaft is assembled to a side of the seat away from the pivoting rod. The gear is securely sleeved on the rotation shaft and engages with the racks. The transmission member is securely sleeved on the rotations shaft. Each pressing assembly is connected to the transmission member of the transmission assembly, and when the connecting rod drives the rotation shaft, and the rotation shaft moves the pressing assembly toward the seat, the protection block is then pressed to the workpiece.

Abstract: A computer implemented method for detecting input gesture events on a touchscreen of an electronic device and for unlocking the electronic device is disclosed. The method may include displaying, while the electronic device is in a locked state, a plurality of guidance lines on the touchscreen of the electronic device, detecting, during an input gesture event, guidance line crossings and calculating a number of guidance line crossings detected during the input gesture event. The method may also include converting a calculated number of detected guidance line crossings into at least one password digit, comparing a sequence of password digits to a stored password in the electronic device and unlocking, in response to comparing the sequence of password digits to the stored password, the electronic device.

Abstract: A device, method and computer program product are provided for unlocking a touchscreen. In response to entering a touchscreen unlocking interface, a slide-to-unlock button is displayed on a touchscreen at its initial position, wherein the slide-to-unlock button is divided into two portions. In response to pressing a first portion of the slide-to-unlock button and sliding the slide-to-unlock button along a specified trace, information about a position of the slide-to-unlock button on the specified trace is displayed on a second portion of the slide-to-unlock button. In response to performing a first action on the pressed first portion of the slide-to-unlock button, information about a position of the slide-to-unlock button on the specified trace when the first action is performed on the first portion of the slide-to-unlock button is received.

Abstract: A method for controlling well bore pressure based on model prediction control theory and systems theory, includes: detecting a well bottom pressure, a stand pipe pressure, a casing pressure, an injection flow rate and an outlet flow rate during the drilling operation process and determining the presence of overflow or leakage; if there is no overflow or leakage, then fine-adjusting the wellhead casing pressure according to the slight fluctuations of the well bottom pressure, the stand pipe pressure or the casing pressure; if there is overflow or leakage, simulating and calculating the overflow or leakage position and starting time of the overflow or leakage, predicting the variation over a future time period of the well bore pressure in the well drilling process, and utilizing an optimization algorithm to calculate the control parameter under a minimum of an actual well bottom pressure difference during the future period.

Abstract: A computer implemented method for detecting input gesture events on a touchscreen of an electronic device and for unlocking the electronic device is disclosed. The method may include displaying, while the electronic device is in a locked state, a plurality of guidance lines on the touchscreen of the electronic device, detecting, during an input gesture event, guidance line crossings and calculating a number of guidance line crossings detected during the input gesture event. The method may also include converting a calculated number of detected guidance line crossings into at least one password digit, comparing a sequence of password digits to a stored password in the electronic device and unlocking, in response to comparing the sequence of password digits to the stored password, the electronic device.

Abstract: A computer implemented method for detecting input gesture events on a touchscreen of an electronic device and for unlocking the electronic device is disclosed. The method may include displaying, while the electronic device is in a locked state, a plurality of guidance lines on the touchscreen of the electronic device, detecting, during an input gesture event, guidance line crossings and calculating a number of guidance line crossings detected during the input gesture event. The method may also include converting a calculated number of detected guidance line crossings into at least one password digit, comparing a sequence of password digits to a stored password in the electronic device and unlocking, in response to comparing the sequence of password digits to the stored password, the electronic device.