Abstract: The present disclosure provides a gated range scanning linear frequency modulated continuous wave (LFMCW) radar structure, including: a frequency synthesizer, a first mixer, a second mixer, a first filter, and a third mixer. The frequency synthesizer is configured for generating a first local oscillating signal and a second local oscillating signal, a frequency of the first local oscillating signal varying in a frequency range, each frequency corresponding to a sub-range of a coverage range scanned by the LFMCW radar structure. The first mixer is configured for mixing a copy of a transmitted signal and the first local oscillating signal to generate a first output signal (the receiver's first local oscillator). The second mixer is configured for mixing the first output signal and a received signal from a receiving antenna to generate a second output signal that includes an intermediate frequency (IF) signal being received by the first filter.

Abstract: The present disclosure provides a method for fusion and inference with per-hop link quality measurements in frequency hopping satellite communication (SATCOM) systems. The method includes: grouping hops having a same SATCOM link set into one hop group such that the one hop group contains a plurality of same SATCOM link sets; grouping the measurement sets into one or more first measurement groups, based on a link identification; in the each first measurement group having the same link identification, further grouping the measurement sets having a same range of the signal amplitude measurements into one or more second measurement groups; obtaining interference conditions by associating second measurement groups of all links in each hop group based on hop identifications belonging to the second measurement groups.

Abstract: Method and system for detecting and tracking multiple moving targets based on wide-area motion imagery are provided. The method includes receiving a task request from a client; sending the task request to a local agent; acquiring to-be-processed images from the client, in response to the task request; calling an Hadoop API and checking a running status of a Hadoop system for an available resource in the Hadoop system; when a resource in the Hadoop system is available, pushing the to-be processed images to a back-end Hadoop distributed file system (HDFS); running tracking algorithms of multiple moving objects associated with the to-be-processed images to provide tracking results of the multiple moving objects; when the Hadoop system is completed in running the tracking algorithms, generating and sending a message to the local agent; and sending the tracking results of the multiple moving objects from the HDFS to the front-end database.

Abstract: Systems and methods are provided for generating a perspective view of item images and/or determining collections of similar items. For example, a set and/or collection of item images may be presented in a perspective view. One or more options may be selected by a user to update the set and/or collection of items and/or images. An updated set and/or collection may be determined, for example, by clustering the items and/or comparing items with the base item. One or more dimensions and/or attributes may be used to cluster and/or graph the items to determine new collections of items.

Abstract: Some examples include a turbine component comprising: a ceramic composite (CMC) having a matrix; and a watertight coating chemically miscible and/or mutually soluble with/in the CMC because particles and/or fibers which are composed of an identical or chemically matching, but at least chemically compatible. At least part of the watertight coating is incorporated in the matrix of the CMC, the matching and compatible material comprising at least one of: aluminum oxide, yttrium aluminum garnet (YAG), and yttrium-stabilized zirconium oxide (YSZ).

Abstract: The present disclosure provides a gated range scanning linear frequency modulated continuous wave (LFMCW) radar structure, including: a frequency synthesizer, a first mixer, a second mixer, a first filter, and a third mixer. The frequency synthesizer is configured for generating a first local oscillating signal and a second local oscillating signal, a frequency of the first local oscillating signal varying in a frequency range, each frequency corresponding to a sub-range of a coverage range scanned by the LFMCW radar structure. The first mixer is configured for mixing a copy of a transmitted signal and the first local oscillating signal to generate a first output signal (the receiver's first local oscillator). The second mixer is configured for mixing the first output signal and a received signal from a receiving antenna to generate a second output signal that includes an intermediate frequency (IF) signal being received by the first filter.

Abstract: In accordance with various embodiments, a method for uplink multiple accessing based on code division multiple access (CDMA) technology and a related system are provided. The method comprises: designing a practical uplink spreading waveform for a code division multiple access (CDMA) based SCN by leveraging a plurality of pseudorandom sequences and investigating a channel coding block and a modulation block for the CDMA based SCN; determining an uplink frequency sub-band division for the CDMA based SCN to optimize a tradeoff between a performance and an implementation cost of CDMA based SCN; and specifying a configuration of a control system of the CDMA based SCN.

Abstract: Methods and systems for cyber secure data communications are provided. In some embodiments, a method for transmitting data comprises: performing a marker-based data encoding process to embed a digital watermark into each of a plurality of original data flows to be transmitted to a plurality of receivers; performing a non-orthogonal multiple access process to allocate transmission powers to the plurality of original data flows, such that the plurality of original data flows are simultaneously superposed on a carrier frequency to generate a superposed signal; performing a noise modulation process to modulate the superposed signal to generate a noise-like signal and a reference noise signal; transmitting the noise-like signal and the reference noise signal through orthogonally polarized antennas; and performing a portal-based data integrity analysis process to check whether a receiver in the plurality of receivers is compromised or manipulated.

Abstract: Methods and systems for space situational awareness (SSA) demonstration are provided.

Abstract: Method and system for detecting and tracking multiple moving targets based on wide-area motion imagery are provided. The method includes receiving a task request from a client; sending the task request to a local agent; acquiring to-be-processed images from the client, in response to the task request; calling an Hadoop API and checking a running status of a Hadoop system for an available resource in the Hadoop system; when a resource in the Hadoop system is available, pushing the to-be processed images to a back-end Hadoop distributed file system (HDFS); running tracking algorithms of multiple moving objects associated with the to-be-processed images to provide tracking results of the multiple moving objects; when the Hadoop system is completed in running the tracking algorithms, generating and sending a message to the local agent; and sending the tracking results of the multiple moving objects from the HDFS to the front-end database.

Abstract: Systems and methods are provided for determining a principal image from a collection of images presented in a perspective view. A perspective view of images may be interactive and/or images may simultaneously increase or decrease in size in response to user interaction. Methods and/or techniques may be used to determine a principal image from a set of images based on a direction, speed, and/or velocity of movement or user interaction. A principal image in the perspective view may be the largest currently presented image and/or may be presented at the forefront to the user. Furthermore, an animation and/or video may be presented to the user following a determination of a principal image and/or after a configurable period of time without subsequent user interaction, which may further highlight or bring attention to a particular item to the user.

Abstract: In accordance with various embodiments, a method for uplink multiple accessing based on code division multiple access (CDMA) technology and a related system are provided. The method comprises: designing a practical uplink spreading waveform for a code division multiple access (CDMA) based SCN by leveraging a plurality of pseudorandom sequences and investigating a channel coding block and a modulation block for the CDMA based SCN; determining an uplink frequency sub-band division for the CDMA based SCN to optimize a tradeoff between a performance and an implementation cost of CDMA based SCN; and specifying a configuration of a control system of the CDMA based SCN.

Abstract: Disclosed are new boronizing compositions consisting of boron fluoride and boron oxide, borax, or an iron boride. The compositions reduce the heating temperature and time. Further disclosed are methods of boronizing a metal substrate including these compositions, or any combination thereof.

Abstract: A gas turbine arrangement, a power plant having such a gas turbine arrangement and a method for operating the power plant are provided. A compressor may be mechanically coupled to a turbine which can be driven by combustion gases, such as can be generated by combustion of fuel with the compressed combustion air. An exhaust system may be used to discharge the combustion gases. One or more thermoelectric generators may be thermally coupled to the exhaust system for generating electrical energy from residual heat of the combustion gases which pass in the exhaust system. This gas turbine arrangement allows waste heat from the combustion gases to be utilized and thus the overall efficiency of the gas turbine arrangement can be increased and pollutant emissions may be lowered.

Abstract: A joint transmission power control and a transponder communication system, transmitting a plurality of uplink signals to a bent pipe transponder, combining the plurality of uplink signals to generate a combined downlink signal, transmitting the combined downlink signal to a ground hub, performing an estimate and pre-qualification process by the plurality of down link signals to determine a selected waveform, perform the join transmission power control of uplink margins are satisfied.

Abstract: A rotary anode for an X-ray tube includes a ceramic base body that carries a focal path for emitting X-rays during electron irradiation. The ceramic base body is made of a mixture of silicon carbide and at least one high temperature-resistant diboride.