Abstract: The present disclosure relates to a technical field of optical communication, and provides a method and an apparatus for determining maximum gain of Raman fiber amplifier. Wherein the method includes obtaining transmission performance parameters of a current optical fiber transmission line; respectively obtaining impact factors A1, A2, A4 according to a distance between a joint and a pump source, a fiber loss coefficient, and a fiber length included in the transmission performance parameters; calculating a joint loss value AttAeff according to a distance between a joint and a pump source, a fiber loss coefficient, and looking up impact factor A3 according to AttAeff; determining an actual maximum gain which may actually be achieved by the Raman fiber amplifier according to A1, A2, A3, A4.

Abstract: Controllers and methods for controlling a resonant power converter output voltage include operating the power converter according to a control period comprising an on cycle operation mode for a duration T_on that produces a first voltage Vo1 and an off cycle operation mode for a duration T_off that produces a second voltage Vo2. Vo1 is produced using a first switching frequency for a first selected number of switching cycles corresponding to the on time T_on. The converter output voltage or the converter input and output voltages may be sensed and used to determine the switching frequency during the on cycle operation mode and the duration of the off cycle operation mode. The final output voltage of the power converter is regulated to a selected value based on a ration of (T_on):(T_on+T_off). The controllers and methods may be used with power converters in power delivery devices to accept wide input voltage ranges compatible with devices such as cell phones, tablet computers, and notebook computers.

Abstract: Described are systems and methods that solve localization problems using Machine Learning models to compute country vectors for each linked content item and present content items in response to requests based on the country vectors. For example, a request from a user in Country A may be processed to determine candidate content items responsive to the request and to determine Country A as the country corresponding to the request. The candidate content items may then be processed to determine, for each candidate content item, a country vector corresponding to Country A as indicative of the relevance of the content item to Country A. Content items that are more likely than not to be relevant to the country of the request (e.g., Country A), as indicated by the respective country vector, may be considered as responsive and all other candidate content items discarded.

Abstract: An insulating medium rubber film and a production method thereof, and a multi-layer printed-circuit board. The insulating medium rubber film includes a release film and an insulating medium layer arranged on the surface of the release film, where materials of the insulating medium layer include saturated polyester resin, amino resin or blocked isocyanate, epoxy resin, a curing agent, inorganic filler and a curing accelerator. According to the insulating medium rubber film and the production method thereof and the multi-layer printed-circuit board, by introducing the saturated polyester resin component into an epoxy resin composition, the produced insulating medium rubber film has the advantages that a dielectric constant is low, a dielectric dissipation factor is low, thermal expansion is not liable to happen, and adhesion is good.

Abstract: Provided is a salt of an Syk inhibitor and a crystalline form thereof, and more specifically, provided are 5-fluoro-1-methyl-3-((5-(4-(oxetan-3-yl)piperazine-1)-yl)pyridin-2-yl)amino)-6-(1H-pyrazol-3-yl)quinoline-2(1H)-ketamine hydrochloride, a crystalline form thereof, a preparation method therefor, a pharmaceutical composition thereof and a use thereof. The hydrochloride of the compound represented by formula I and the crystalline form thereof have good salt-forming properties, high stability and low hygroscopicity, have advantages in terms of physical properties, safety and metabolic stability, and have value in prepared medicines.

Abstract: The present application belongs to the field of medicine, and in particular relates to a crystal of a diarylthiohydantoin compound having a structure of the following formula (I), a preparation method therefor, and use thereof in the preparation of medicaments for treating related diseases which are androgen-mediated.

Abstract: The application discloses a light scattering parameter measurement system and its measurement method. Dual-frequency scattering interference technology is adopted to obtain distributed measurement of Rayleigh scattering parameters in an optical fiber. The Rayleigh scattering coefficient r and phase retardance ? are modulated on different components of the interference signal respectively by using the dual-frequency interference technology. The Rayleigh scattering coefficient r and phase retardance ? can be decoupled by simple filtering, to obtain separate measurements. A linear stretch is applied to the optical fiber under test, to add uniform phase change signals at all positions of the optical fiber under test. As a result, the term containing only Rayleigh scattering coefficient r can be extracted by low-pass filtering. The direct measurement of Rayleigh scattering parameters is of great significance to fundamental and application researches related to Rayleigh scattering of optical fiber.

Abstract: Disclosed is a trifluoromethyl-substituted sulfonamide BCL-2-selective inhibitor, in particular disclosed are a compound of formula I, a stereoisomer or a pharmaceutically acceptable salt thereof, a preparation method therefor, and a pharmaceutical composition thereof. Also disclosed are the uses of said compound and of a pharmaceutical composition comprising same for treating anti-apoptotic BCL-2-related diseases, such as cancer.

Abstract: A cleaning robot and an automatic cleaning method thereof, to implement automatic cleaning. The cleaning robot includes a lifting mechanism and a cleaning base, where the cleaning base includes a base body, a scraping mechanism disposed on the base body, and a spraying assembly provided with nozzles. The nozzles are arranged along a mopping component of the cleaning robot and formed into a structure for spraying water or mist to the mopping component. The scraping mechanism includes a scraper, and the scraper comes into contact with and moves relative to the mopping component, to scrape off the attachment on the mopping component while squeezing out the water. The lifting mechanism causes the mopping component to lift or move down by causing the mopping component to come into contact with or separate from the scraper.

Abstract: A vacuum suction pen which can always be held squarely above a work being done notwithstanding the orientation of a component to be fitted to the work includes a penholder, a pen head, a connecting mechanism, and a suction cup. The suction cup is at an end of the pen head away from the penholder and made of rubber for soft handling. The connecting mechanism is coupled to the penholder and the pen head, and comprises a connecting member, the connecting member comprises a first connecting portion and a second connecting portion, the first connecting portion is disposed in the penholder, the second connecting portion is coupled to the pen head, and the pen head can be rotationally disposed on the penholder. A method for using the vacuum suction pen is also provided.

Abstract: Aspects include high resolution brain-electronic interfaces and related methods. Aspects include forming a semiconductor circuit on a substrate, depositing a tensile stress layer on the circuit, and separating the semiconductor circuit from a portion of the silicon substrate. Aspects also include removing the tensile stress layer from the semiconductor circuit and transferring the semiconductor circuit to a biocompatible film.

Abstract: Provided are a data communication method and system, an electronic device, a chip and a storage medium. The data communication method includes: establishing a wireless communication connection with a first receiving terminal, and notifying the connection information to a second receiving terminal. The connection information includes information of a communication channel for performing wireless communication between the transmitting terminal and the first receiving terminal. The connection information is used to instruct the at least one second receiving terminal to monitor communication data in the communication channel. When the at least one second receiving terminal knows after monitoring the communication data, data required to be transmitted to the first receiving terminal is transmitted to the communication channel.

Abstract: One embodiment facilitates measurement of a performance of a storage device. During operation, the system determines a normalized cost for an I/O request, wherein the normalized cost is independent of an access pattern and a type of the I/O request, wherein the normalized cost is indicated by a first number of virtual I/O operations consumed by the I/O request, and wherein a virtual I/O operation is used as a logical unit of cost associated with physical I/O operations. The system identifies a performance metric for the storage device by calculating a second number of virtual I/O operations per second which can be executed by the storage device. The system allocates incoming I/O requests to the storage device based on the performance metric, e.g., to satisfy a Quality of Service requirement, thereby causing an enhanced measurement of the performance of the storage device.

Abstract: Disclosed a crop yield prediction method and system based on low-altitude remote sensing information from an unmanned aerial vehicle (UAV). Obtaining a plurality of images taken by the UAV; stitching the plurality of images to obtain a stitched image; performing spectral calibration on the stitched image to obtain the reflectivity of each pixel in the stitched image; using a threshold segmentation method to segment the stitched image, to obtain a target area for crop yield prediction; using a Pearson correlation analysis method to analyze a correlation between the reflectivity of each band and the growth status and yield of the crop to obtain feature bands; constructing yield prediction factors based on the feature bands; and determining a predicted crop yield value of the target area for crop yield prediction based on the yield prediction factors and a crop planting area of the target area for crop yield prediction.

Abstract: A display device, a method for automatically adjusting brightness of a display screen and a terminal equipment are provided. An ambient light detection device is integrated in an operable region of the display device. The ambient light detection device includes a light blocking layer and a photoelectric sensor. The display device includes a display assembly and a control device. The display assembly includes a backpanel assembly, the light blocking layer being arranged in the backpanel assembly and provided with a light passing hole suitable for the passing of ambient light, the photoelectric sensor being disposed under the backpanel assembly; a display screen disposed over the backpanel assembly; a display connected to the display screen; and a control device connected to the photoelectric sensor The display chip is connected to the control device, to adjust brightness of the display screen according to variance of the ambient light.

Abstract: A joint cavity injection preparation is provided. The active ingredient of the joint cavity injection preparation is deacetylated xanthan gum (XG). The deacetylated XG has a molecular weight of 500,000 to 20,000,000. The joint cavity injection preparation is prepared from deacetylated xanthan gum (XG), which has higher biocompatibility and safe wide-dosage range than existing joint cavity injection preparations prepared from XG.

Abstract: The disclosure discloses a system for acquiring an inherent energy efficiency factor function of a CNC machine tool, the system comprises an equipment information management module, a test parameter setting module, a NC code generation module, a field test management module, a data analysis module, a validity verification module and power sensors. The NC code generation module is used to generate the NC code to control the operation of the CNC machine tool to be tested according to the test parameters and information of the CNC machine tool to be tested. The field test management module is used to analyze the power data information of power sensors and generate the input power sets of CNC machine tool in each test operation process; The data analysis module is used to generate the inherent energy efficiency factor function according to the input power set.

Abstract: Embodiments of the present invention provide a method for improving voice call quality. The method is applied to a terminal, and the terminal includes a buffer module. When the buffer module includes voice data, the method includes: determining that the voice data buffered by the buffer module is in an accumulated state; and cutting off an SID frame in the voice data. To be specific, when the SID frame is detected and the voice data buffered by the buffer module is in the accumulated state, the SID frame in the voice data is cut off. The SID frame does not include semantic data. In this way, an amount of to-be-sent voice data is reduced, a packet loss and a sending delay are reduced, voice call quality is improved, and user experience is improved.

Abstract: The disclosure relates to technology for haptic stimulation. According to one aspect of the present disclosure, there is provided a haptic stimulation system comprising a haptic stimulation interface comprising a pattern of stimulation elements configured to stimulate receptors in skin of a user. The haptic stimulation system further comprises a control circuit configured to present information in the haptic stimulation interface in accordance with a presentation mode that is tailored to the user.

Abstract: A key management method/apparatus (user equipment) are described. The key management includes encrypting user identity information based on a first public key. The user equipment sends a first user identity message to a first network device. The first user identity message includes the user identity information, an indication identifier that indicates whether the user identity information is encrypted, and a reference identifier for indexing the first public key. The first network device sends, to a second network device, a third user identity message including the user identity information and the reference identifier that indexes the first public key. Thus, when receiving the third user identity message, the second network device can determine the encrypted user identity information, according to a pre-stored mapping table including the first private key.