Abstract: The present disclosure relates to the technical field of drilling, in particular to a composite material, a composition, a drilling fluid, and a method for plugging formation well wall fractures. The composite material includes a polymer matrix and metal ions embedded in the polymer matrix, an embedding rate of the metal ions is not less than 90 wt %, and turbidity of an aqueous solution of the composite material is not less than 1000 NTU under a condition of pH?8. The composite material can actively and quickly identify a change in a formation environment based on a difference in pH values between the drilling fluid and the formation environment, and achieve a precise response and precise matching with a formation well wall fracture environment, and a small amount of composite material can effectively increase a plugging rate of the formation well wall fracture.

Abstract: The system obtains a first low-level information representing a first multiplicity of activities. The first low-level information includes a first log including a first multiplicity of entries representing the first activity. An entry among the first multiplicity of entries can represent various activities. The system obtains a second low-level information representing a second multiplicity of activities. The second low-level information includes a second log comprising a second multiplicity of entries. The system obtains a correspondence between the second multiplicity of activities and the second low-level information. The correspondence maps a second activity among the second multiplicity of activities to a subset of entries in the second log. The system determines that the subset of entries in the second log and a subset of entries in the first log are similar and the subset of entries in the first log indicates the second activity.

Abstract: The system obtains data associated with UE, representing interaction between the UE and a network. The data includes: previous bandwidth usage associated with the UE, previous CDR associated with the UE, anticipated geolocation of the UE, a plan associated with the UE, one or more media events, a number of lines associated with the UE, a length of time the UE has been associated with the network, and a unique identifier associated with the UE. The system obtains multiple plans associated with the network, where a plan indicates the bandwidth usage associated with the UE within a predetermined period. Based on the data, the system predicts the bandwidth usage associated with the UE within the predetermined period to obtain a predicted bandwidth usage and determines the plan among the multiple plans accommodating the predicted bandwidth usage. The system requests the bandwidth usage associated with the plan from the network.

Abstract: The system obtains an encoder configured to receive a first data representing interaction between the first UE and the first network. The encoder produces a first embedding representing the first data representing the first interaction between the first UE and the first network. A memory footprint of the first embedding is smaller than a memory footprint of the first data. The system obtains a second data representing a second interaction between a second UE and a second network. The system provides the second data to the encoder configured to produce a second embedding indicating the second data representing the second interaction between the second UE and the second network. The system obtains the second embedding from the encoder.

Abstract: A sealing mechanism is suitable for a key device. The key device contains a key base, and the sealing mechanism contains one front ring shell, one lamp base shell and one sealing member. The front ring shell is installed on the key base, and the lamp base shell is installed on the front ring shell. The sealing member contains a sealing body and a sealing wall. The sealing wall is circularly arranged around the sealing body so as to be fixed on the lamp base shell. When the lamp base shell is installed on the front ring shell, the lamp base shell and the front ring shell respectively push the periphery of the sealing body, so that the sealing body and the front ring shell jointly form one sealing space so as to seal one first open groove on the key base.

Abstract: A sealing mechanism is suitable for a key device. The key device contains a key base, and the sealing mechanism contains one front ring shell, one lamp base shell and one sealing member. The front ring shell is installed on the key base, and the lamp base shell is installed on the front ring shell. The sealing member contains a sealing body and a sealing wall. The sealing wall is circularly arranged around the sealing body so as to be fixed on the lamp base shell. When the lamp base shell is installed on the front ring shell, the lamp base shell and the front ring shell respectively push the periphery of the sealing body, so that the sealing body and the front ring shell jointly form one sealing space so as to seal one first open groove on the key base.

Abstract: Solar energy absorptive coatings that comprise single cermet layers with a homogeneous metal volume fraction exhibit an absorptance of about 0.8, which is not high enough for practical solar applications. To achieve absorptance greater than 0.9, graded composite films have been developed, but they give rise to higher thermal emittance due to the absorption edge not being sharp enough. This leads to increased thermal emittance at high operating temperatures, in the range of 300.degree. C. to 500.degree. C. There is now disclosed a novel solar selective surface coating which is composed of two cermet layers, with different metal volume fractions in each layer. The two cermet layers have different thicknesses, and the layers have thicknesses and volume fractions such that solar radiation is absorbed by internal absorbing and phase cancellation interference, but the cermet layers are substantially transparent in the thermal infrared region.