Abstract: The present invention relates to the technical field of catalyst preparation, disclosing a preparation method and application of a coated vanadium-tungsten-titanium oxide monolithic SCR catalyst. The method includes the steps of mixing a vanadium oxide precursor, a tungsten oxide precursor, titanium dioxide, an inorganic adhesive, an organic adhesive and a macromolecular surfactant with deionized water and stirring them to obtain a thick liquid; adding a pH adjuster to the thick liquid to make its pH 1.5-4.5; impregnating a cordierite honeycomb carrier in the thick liquid to obtain a preliminarily-impregnated catalyst and dried and calcined the preliminarily-impregnated catalyst to obtain a finished catalyst. The method has advantages such as simple operation, easy repetition and short time-consuming, so it can be applied to exhaust gas post-treatment of a marine diesel engine, and provide a good choice for catalysts used to denitrify medium and high temperature exhausted gas from marine engines.

Abstract: A joint for a swimming pool frame, and a swimming pool including the joint are provided. The joint includes a joint body including a leg pipe holder configured to have a leg pipe of the swimming pool frame inserted into the leg pipe holder. The joint also includes a side pipe holder configured to have a side pipe of the swimming pool frame inserted in the side pipe holder. A locking hole is formed through the side pipe holder. The joint body also includes a locking part including a locking pin configured to extend through the locking hole and through a corresponding connecting hole in the side pipe, thereby holding the side pipe to the side pipe holder.

Abstract: This application provides an example base station for an example wireless communication network and an example method. One example base station includes a central unit and a remote radio unit (RRU). The RRU includes one or more antennas. The RRU is coupled to the central unit via one or more optical transmission fibers. Each optical transmission fiber defines a respective downlink transmission channel for transmitting a respective downlink transmission signal from the central unit to the respective antenna of the RRU. The RRU is configured to provide a respective uplink feedback signal based on the respective downlink transmission signal via an uplink feedback channel to the central unit.

Abstract: A MIMO system comprises a remote radio unit (RRU) and central unit. The RRU comprises: a binary phase shift keying (BPSK) modulator, configured to modulate a BPSK waveform by a local oscillator (LO) signal to generate a stimulus signal, wherein the LO signal is derived from a downlink optical signal received via downlink radio over fiber (DL-ROF) from a central unit (CU); and an optical signal generator, in particular a laser, configured to generate an uplink optical signal based on the stimulus signal for transmission via uplink radio over fiber (UL-ROF) to the CU.

Abstract: A light bulb includes a bulb shell, a light source, a driver, a head housing and a bottom switch. The light source is enclosed by the bulb shell for emitting a light through the bulb shell. The driver converts an external power to a driving current supplied to the light source. The head housing has an Edison cap. The head housing is coupled to the bulb shell. The driver is enclosed by the head housing. The Edison cap is plugged to an Edison socket for receiving the external power source. The bottom switch is disposed on the bottom of the Edison cap for changing a setting of the driver.

Abstract: The present disclosure provides a code generator for generating an {N?, K?} code for encoding and/or decoding data transmitted in a communication channel from an {N, K} code, wherein N and N? are code lengths, K and K? are code dimensions. The code generator is configured to shorten the {N, K} code to obtain an intermediate code, and to extend the intermediate code to obtain the {N?, K?} code. The present disclosure also provides a corresponding code construction method. Further, the present disclosure provides a device for encoding and/or decoding data transmitted in a communication channel, the device being configured to encode and/or decode the data based on an {N?, K?} code generated from the {N, K} code.

Abstract: Using a set of anomalies indicative of a malicious pattern of behavior collected from data to determine new alerts for anomalies included in subsequently collected data. A set of anomalies found in data collected from data sources is accessed. The set of anomalies is determined by a prior analysis to be indicative of a malicious pattern of behavior by entities associated with the set of anomalies. Data that is subsequently collected from the data sources is searched to determine if any of the data includes the set of anomalies. Alerts are generated for any of the subsequently collected data that includes the set of anomalies.

Abstract: A remote radio unit is for a base transceiver station. The remote radio unit includes: a noise generator configured to provide a RF noise signal having predefined statistical properties; a communication interface configured to transmit the RF noise signal as a stimulus signal over a radio-over-fiber uplink channel between the remote radio unit and a central unit of the base transceiver station for determining a pre-distortion of a target signal to be transmitted by the remote radio unit. The communication interface is further configured to receive the pre-distorted target signal over a ROF downlink channel between the remote radio unit and the central unit of the base transceiver station. The remote radio unit also has an antenna for transmitting the pre-distorted target signal received by the communication interface.

Abstract: A light bulb includes a bulb shell, a light source, a driver, a head housing and a bottom switch. The light source is enclosed by the bulb shell for emitting a light through the bulb shell. The driver converts an external power to a driving current supplied to the light source. The head housing has an Edison cap. The head housing is coupled to the bulb shell. The driver is enclosed by the head housing. The Edison cap is plugged to an Edison socket for receiving the external power source. The bottom switch is disposed on the bottom of the Edison cap for changing a setting of the driver.

Abstract: This application provides an example base station for an example wireless communication network and an example method. One example base station includes a central unit and a remote radio unit (RRU). The RRU includes one or more antennas. The RRU is coupled to the central unit via one or more optical transmission fibers. Each optical transmission fiber defines a respective downlink transmission channel for transmitting a respective downlink transmission signal from the central unit to the respective antenna of the RRU. The RRU is configured to provide a respective uplink feedback signal based on the respective downlink transmission signal via an uplink feedback channel to the central unit.

Abstract: A MIMO system comprises a remote radio unit (RRU) and central unit. The RRU comprises: a binary phase shift keying (BPSK) modulator, configured to modulate a BPSK waveform by a local oscillator (LO) signal to generate a stimulus signal, wherein the LO signal is derived from a downlink optical signal received via downlink radio over fiber (DL-ROF) from a central unit (CU); and an optical signal generator, in particular a laser, configured to generate an uplink optical signal based on the stimulus signal for transmission via uplink radio over fiber (UL-ROF) to the CU.

Abstract: A remote radio unit is for a base transceiver station. The remote radio unit includes: a noise generator configured to provide a RF noise signal having predefined statistical properties; a communication interface configured to transmit the RF noise signal as a stimulus signal over a radio-over-fiber uplink channel between the remote radio unit and a central unit of the base transceiver station for determining a pre-distortion of a target signal to be transmitted by the remote radio unit. The communication interface is further configured to receive the pre-distorted target signal over a ROF downlink channel between the remote radio unit and the central unit of the base transceiver station. The remote radio unit also has an antenna for transmitting the pre-distorted target signal received by the communication interface.

Abstract: Using a set of anomalies indicative of a malicious pattern of behavior collected from data to determine new alerts for anomalies included in subsequently collected data. A set of anomalies found in data collected from data sources is accessed. The set of anomalies is determined by a prior analysis to be indicative of a malicious pattern of behavior by entities associated with the set of anomalies. Data that is subsequently collected from the data sources is searched to determine if any of the data includes the set of anomalies. Alerts are generated for any of the subsequently collected data that includes the set of anomalies.

Abstract: The present disclosure provides a code generator for generating an {N?, K?} code for encoding and/or decoding data transmitted in a communication channel from an {N, K} code, wherein N and N? are code lengths, K and K? are code dimensions. The code generator is configured to shorten the {N, K} code to obtain an intermediate code, and to extend the intermediate code to obtain the {N?, K?} code. The present disclosure also provides a corresponding code construction method. Further, the present disclosure provides a device for encoding and/or decoding data transmitted in a communication channel, the device being configured to encode and/or decode the data based on an {N?, K?} code generated from the {N, K} code.

Abstract: The disclosed computer-implemented method for detecting obscure cyclic application-layer message sequences in transport-layer message sequences may include (i) collecting a composite sequence of transport-layer messages that are exchanged between a first computing device and a second computing device over a single long-standing transport-layer connection, (ii) constructing a sequence graph from the composite sequence, (iii) traversing the sequence graph to discover a first obscure cyclic sequence of application-layer messages in the composite sequence, and (iv) performing a security action using a representation of the first obscure cyclic sequence. In some examples, the composite sequence may include the first obscure cyclic sequence and a second obscure cyclic sequence of application-layer messages that were exchanged by the first computing device and the second computing device, and each message in the composite sequence may include a distinguishing feature.

Abstract: Real-time anomaly detection in a network using state transitions. In one embodiment, a method may include identifying a sequence of messages sent between a first network node and a second network node over a network link. The method may further include identifying a sequence of message states for the sequence of messages. The method may also include identifying variable-length candidate patterns in the sequence of message states. The method may further include adding the candidate patterns to a baseline pattern store. The method may also include comparing a real-time sequence of messages to patterns in the baseline pattern store to detect anomalies in the real-time sequence of messages. The method may further include, in response to the detecting of the anomalies, alerting a security action on one or more of the first network node, the second network node, and the network link using the detected anomalies.

Abstract: Pattern discovery performed on event data may include selecting an initial set of parameters for the pattern discovery. The parameters may specify conditions for identifying a pattern in the event data. A pattern discovery run is executed on the event data based on the initial set of parameters, and a parameter may be adjusted based on the output of the pattern discovery run.

Abstract: The disclosed computer-implemented method for identifying message payload bit fields in electronic communications may include (i) monitoring messages transmitted via a network, (ii) selecting a plurality of messages transmitted via the network, each of the plurality of messages comprising an identical message identifier corresponding to a specified message type having a payload, (iii) determining for each bit position in the payload of the specified message type, a quasi-entropy value based on a proportion of occurrences of a first bit value and a proportion of occurrences of a second bit value at each corresponding bit position in the plurality of messages, and (iv) identifying at least one of a near-random bit field, a periodic bit field, and a constant bit field within the specified message type based on the determined quasi-entropy values. Various other methods, systems, and computer-readable media are also disclosed.

Abstract: Example embodiments disclosed herein relate to distributed pattern discovery. A local frequent pattern tree or local frequent pattern trees can be merged. The merging can be based on activities or transactions associated with the local frequent pattern tree or trees.