Abstract: The present application relates to the technical field of glass, in particular to an optical glass and a preparation method and application thereof. The optical glass comprises the following oxide component with the following weight percentage content, La2O3: 30%-40%; Ga2O3: 15%-25%; Nb2O5: 8%-18%; TiO2: 5%-10%; HfO2: 5%-10%; Ta2O5: 5%-10%; SiO2: 5%-10%; BaO: 2%-6%; RF3: 1%-3%, R may be one or both of La and Ga; and C: 0.005%-0.02%. The optical glass has a refractive index equal to or greater than 2.0, an internal transmittance at 440 nm equal to or greater than 93%, and a water resistance stability of grade 1, and can be used in the fields of virtual reality, digital cameras and vehicle display.

Abstract: Disclosed are a disk array redundancy method and system. The method includes: monitoring a running state of a disk array, and sending abnormal information to a state machine in response to a monitored abnormal running state of the disk array to start a timer according to a preset redundancy duration; sending a silent request to an agent to execute silent processing to suspend input and output operations of the disk array, and switching from a normal running mode to a temporary running mode; sending a silent recovery request to the agent to execute silent recovery processing to recover the input and output operations; and after the silent recovery processing is completed, switching a running mode to the normal running mode in response to the fact that timing time of a timer does not exceed a present redundancy duration and the running state is recovered to be normal.

Abstract: The disclosure provides a method for manufacturing a MRAM, wherein a prefabricated substrate structure is provided, on which at least one array zone bottom interconnection line, at least one bottom electrode and at least one magnetic tunnel junction, at least one logic zone bottom interconnection line, and a first medium layer are provided; a top electrode material layer and a hard mask material layer are formed on a surface of each of the at least one magnetic tunnel junction; the top electrode material layer and the hard mask material layer are photoetched and etched to form at least one top electrode and at least one hard mask layer; backfilling is conducted with a medium, and the backfilled medium is ground to be equal to the hard mask layer in height; the hard mask layer is selectively removed, and at least one array zone top via hole is formed through self-alignment.

Abstract: A surface covering is provided and generally includes a laminated panel, an ultra-violet (UV) and a second coating. The curable surface coating is applied to the laminated panel and includes a first coating. The second coating includes a composition distinctive of the first coating and is cured at a lower energy than the second coating. The second coating is cured at a higher energy to cure both the first coating and the second coating.

Abstract: A surface covering is provided. The surface covering includes a laminated panel and an ultra-violet (UV) curable surface coating applied to the laminated panel. The ultra-violet (UV) curable surface coating includes a first coating, a second coating, abrasive resistant particles, and an antimicrobial additive. The second coating is a composition distinctive of the first coating, the first coating is cured at a lower energy than the second coating, the second coating is cured at a higher energy to cure both the first coating and the second coating. The abrasive resistant particles include silicon carbide (SiC) particles wherein at least 50% of the silicon carbide (SiC) particles have a particle size of less than 45 ?u. The antimicrobial additive selected from a group consisting of N-butyl-1,2-benzisothiazolin-3-one, alkyl dimethyl ammonium saccharinates, Zinc 2-pyridinethiol-1-oxide,10,10?-Oxybisphenoxarsine (OBPA), 4,5-Dichloro-2-octyl-4isothiazolin-3-one (DCOIT) and mixtures thereof.

Abstract: The present disclosure provides a multi-purpose heat sink, a method of manufacturing the same, a board card, and a multi-purpose heat sink platform, where the multi-purpose heat sink is composed of a bracket (310) and heat dissipation components. The cost of the multi-purpose heat sink in the present disclosure is low.

Abstract: A surface covering is provided. The surface covering includes a laminated panel and an ultra-violet (UV) curable surface coating applied to the laminated panel. The ultra-violet (UV) curable surface coating includes a first coating, a second coating, abrasive resistant particles, and an antimicrobial additive. The second coating is a composition distinctive of the first coating, the first coating is cured at a lower energy than the second coating, the second coating is cured at a higher energy to cure both the first coating and the second coating. The abrasive resistant particles include silicon carbide (SiC) particles wherein at least 50% of the silicon carbide (SiC) particles have a particle size of less than 45 mµ. The antimicrobial additive selected from a group consisting of N-butyl- 1, 2-benzisothiazolin-3-one, alkyl dimethyl ammonium saccharinates, Zinc 2-pyridinethiol-1-oxide, 10, 10?-Oxybisphenoxarsine (OBPA), 4,5-Dichloro-2-octyl-4isothiazolin-3-one (DCOIT) and mixtures thereof.

Abstract: A handle structure includes a first handle body, a second handle body, and a transparent plate. The first handle body includes a first handle portion and a first connecting portion. The second handle body includes a second handle portion and a second connecting portion. The first handle body and the second handle body are hollow. The first connecting portion is detachably connected with the second connecting portion when the first handle body and the second handle body are in an installed position. The transparent plate is within and sealingly connected with the first connecting portion and the second connecting portion when the first handle body and the second handle body are in the installed position.

Abstract: A surface covering is provided. The surface covering includes a laminated panel having top layer and an ultra-violet (UV) curable surface coating applied to the laminated panel. The ultra-violet (UV) curable surface coating has a composition with an oligomer, a monomer, a photoinitiator, abrasive resistant particles, and an antimicrobial additive.

Abstract: Provided are a DDoS attack detection method and apparatus. The method comprises: acquiring network traffic of a target moment within a first period by sampling, then querying a traffic period change curve acquired in advance, determining predicted traffic corresponding to the target moment, and confirming a DDoS attack if the network traffic acquired by sampling is larger than the determined predicted traffic. The traffic period change curve is used for indicating a period change law of the predicted traffic, so that before DDoS attack detection is performed at each target moment, it only needs to determine the predicted traffic corresponding to the target moment according to the traffic period change curve without calculating the predicted traffic according to massive historical traffic data before each DDoS attack detection; and the calculation volume is reduced.

Abstract: Feature descriptor matching described herein may include receiving a first input image and a second input image. A feature detector may detect features from the first and second input images. A descriptor extractor may learn local feature descriptors from the features of the first and second input images based on a feature descriptor matching model trained using a ground truth data set. The descriptor extractor may determine a listwise mean average precision (mAP) rank of a pool of candidate image patches from the second input image with respect to a queried image patch from the first input image based on the feature descriptor matching model, the first set of local feature descriptors, and the second set of local feature descriptors. The descriptor matcher may generate a geometric transformation between the first input image and the second input image based on the listwise mAP and a convolutional neural network.

Abstract: A data storage and retrieval system employs online supervised hashing for indexing a data set and retrieving data items therefrom. A hash-based mapping is used to generate hash codes for indexing content items. Data items may be retrieved based on either/both a query label (using corresponding codewords) and the content item itself (using the hash codes). The hash-based mapping is updated using an objective function of distance between the hash codes and respective codewords for labels of labelled content items, preserving semantic similarities of content items. The codewords may be error-correcting codes. Techniques for efficiently updating the index include (1) cycle-based updating and ternary codewords, and (2) reservoir sample-based method of determining when to trigger an update.

Abstract: The present disclosure provides a multi-purpose heat sink, a method of manufacturing the same, a board card, and a multi-purpose heat sink platform, where the multi-purpose heat sink is composed of a bracket (310) and heat dissipation components. The cost of the multi-purpose heat sink in the present disclosure is low.

Abstract: The present disclosure provides a heat dissipation device and a board card. The heat dissipation device includes a fin group provided with a plurality of heat dissipation fins, and a heat pipe group provided with at least one heat pipe. The fin group is wholly located on one side of the heat pipe group in a first direction. The heat dissipation device and the board card have high heat dissipation efficiency.

Abstract: Defending a distributed denial of service attack includes intercepting a service packet sent by the client to a server, according to a rule agreed with the client, obtaining the information carried by a first preset field of the service packet, the inherent information carried by an inherent field of the service packet, and the added information carried by at least one second preset field, according to the hash algorithm agreed with the client, performing a hash processing on the inherent information and at least one added information so as to obtain a hash result, and determining the service packet is discarded when the hash result is different from the information carried by the first preset field.

Abstract: The present disclosure provides a method and devices for defending against distributed denial of service attacks. The method comprises: intercepting, by a defending device, a service message transmitted by a client to a server; obtaining, by the defending device, information carried in a first preset field of the service message and information carried in a second preset field of the service message according to a rule agreed on with the client; processing, by the defending device, the information carried in the second preset field and a preset key according to a hash algorithm agreed on with the client, and obtaining a hash value; and discarding, by the defending device, the service message upon determining that the hash value is different from the information carried in the first preset field.

Abstract: A surface covering is provided. The surface covering includes a laminated panel having top layer and an ultra-violet (UV) curable surface coating applied to the laminated panel. The ultra-violet (UV) curable surface coating has a composition with an oligomer, a monomer, a photoinitiator, abrasive resistant particles, and an antimicrobial additive.

Abstract: Feature descriptor matching described herein may include receiving a first input image and a second input image. A feature detector may detect features from the first and second input images. A descriptor extractor may learn local feature descriptors from the features of the first and second input images based on a feature descriptor matching model trained using a ground truth data set. The descriptor extractor may determine a listwise mean average precision (mAP) rank of a pool of candidate image patches from the second input image with respect to a queried image patch from the first input image based on the feature descriptor matching model, the first set of local feature descriptors, and the second set of local feature descriptors. The descriptor matcher may generate a geometric transformation between the first input image and the second input image based on the listwise mAP and a convolutional neural network.