Abstract: An automatic recognition method for a dry quasi-stationary front in Kunming, Yunnan, China is provided. The automatic recognition method includes: reading data; calculating, by a differential method, a temperature lapse rate between each layer of each point from a ground surface to 650 hPa, and acquiring a maximum inversion trend value; acquiring an initially selected inversion distribution based on the maximum inversion trend value; removing a nighttime clear sky radiation inversion, retaining only a frontal inversion, and binarizing (0, 1); finding a boundary between inversion and non-inversion; removing the abnormal candidate frontal points, and acquiring frontal nodes; removing meso- and micro-scale systems; and performing one-dimensional Gaussian filtering on longitude data of the frontal nodes, and connecting the filtered frontal nodes to acquire a quasi-stationary front in Kunming, Yunnan, China.

Abstract: A mobile edge computing (MEC) task unloading method with a cache mechanism includes: S1: establishing a task unloading total delay model with a cache mechanism and a mobile device-side total energy consumption model based on a user task request; S2: based on the task unloading total delay model and the mobile device-side total energy consumption model, with a goal of minimizing a task unloading total delay and a mobile device-side total energy consumption, establishing a joint optimization model configured for task unloading and caching and having a constraint; S3: transforming the joint optimization model into a fitness function for a particle, where the user task request is the particle; and S4: determining an optimal solution of the particle by using a particle swarm algorithm based on the fitness function, where the optimal solution of the particle is an optimal task unloading decision of the user task request.

Abstract: A method and system for predicting a maximum build rate of a push-the-bit rotary steering tool is provided. In the method, a mechanical mathematical model of a push-the-bit rotary steering device is combined with measured well inclination data of the rotary steering device during actual drilling, a theoretical maximum build rate of a steering tool is calculated by the mechanical mathematical model, and a correction factor is combined with the mechanical mathematical model to predict a maximum build rate of the steering tool during a drilling operation in a same layer of a same block. The method effectively solves the problem of predicting the maximum build rate of the push-the-bit rotary steering device with different parameter changes based on measured data. Therefore, the method and system provide a reliable means for operators to analyze the performance of the push-the-bit rotary steering device, thereby providing technical support for efficient drilling operations.

Abstract: The present disclosure discloses a method for automatically identifying south troughs by improved Laplace and relates to the technical field of meteorology. The method includes the following steps: acquiring grid data of a geopotential height field; calculating a gradient field of the geopotential height field in an x direction; searching for a turning point where a gradient value turned from being negative to being positive, and cleaning the gradient field; calculating a divergence of the x direction to obtain an improved Laplacian numerical value L?; performing 0,1 binarization processing on the L? to obtain a black-and-white image and a plurality of targets of potential troughs, merging the black-and-white image and the plurality of targets of the potential troughs by expansion, recovering original scale through erosion, and selecting an effective target through an angle of direction of a contour and an axial ratio.

Abstract: A data access processing method for an industrial Internet cloud service platform, comprising an industrial device with data to be accessed transmits a data access request to a data processing unit of the platform, and meanwhile uploads a device identifier capable of identifying the industrial device with data to be accessed, the data processing unit retrieves a data upload authentication tag matching the data to be accessed from a traceability unit according to the data access request, and a corresponding access strategy is selected for processing according to the data upload authentication tag, device representation, and the data access request. The data to be accessed can be processed flexibly and intelligently according to requirements of a data owner and an actual operation condition of the platform; and during data processing, various resources of the platform can be well regulated and controlled to process the data to be accessed.

Abstract: The present invention relates to a radiation source orientation technology. The invention discloses a method for optimizing the orientation performance of radiation source orientation system, which comprises the following steps: establishing a radiation source orientation matrix; obtaining the non-zero singular value of the orientation matrix; classifying orientation noise that affects the radiation source orientation system according to the distribution characteristic of noise energy; determining the optimal orientation matrix of the radiation source orientation system according to the minimum non-zero singular value ?min of the orientation matrix and its number of array elements m; determining the optimal orientation array according to the non-zero singular value of orientation matrix considering the distribution of different noise energy. The invention lays a foundation for the optimal design of a non-planar array in a radiation source orientation system.

Abstract: A high-temperature protection method for a solid state drive (SSD) and an implementation device thereof are provided. The device includes a temperature measurement circuit, a host communication interface, a SSD main controller and NAND Flash storage medium chips, wherein the SSD main controller is for controlling data transmission and command interaction between a host and the NAND Flash storage medium chips, including a SATA/PCIe (serial advanced technology attachment/peripheral component interconnect express) physical controller, a high-temperature control manager, a main controller core, a RAM (random access memory) and a NAND Flash controller.

Abstract: An amplifying device includes a power amplifying unit, a power supply unit for providing the power amplifying unit with a positive power supply and a negative power supply, and a mode control unit for controlling a working mode of the power supply unit. The positive power supply and the negative power supply of the amplifying device are able to vary with an output signal thereof, which reduces the power consumption of the outputted transistors of the amplifying device, thereby improving the efficiency of the amplifying device.