Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for simulating a concrete mixture. One of the methods includes obtaining an optical characterization of physical particles, generating a multispherical approximation of the physical particles, the multispherical approximation having reduced dimensionality compared to the optical characterization, simulating an aggregate mixture by applying the multispherical approximation of the particles to a physics simulator to obtain a predicted performance of the proposed aggregate mixture, selectively altering the aggregate mixture based on a comparison with performance metrics and simulating the altered aggregate mixture until the predicted performance satisfies the performance metrics to obtain a final aggregate mixture, and outputting the final aggregate mixture.

Abstract: A distributed acoustic system (DAS) method and system. The system may comprise an interrogator and an umbilical line comprising a first fiber optic cable and a second fiber optic cable attached at one end to the interrogator. The DAS may further include a downhole fiber attached to the umbilical line at the end opposite the interrogator and a light source disposed in the interrogator that is configured to emit a plurality of coherent light frequencies into the umbilical line and the downhole fiber. The method may include generating interferometric signals of the plurality of frequencies of backscattered light that have been received by the photo detector assembly and processing the interferometric signals with an information handling system.

Abstract: A distributed acoustic system (DAS) method and system. The system may comprise an interrogator and an umbilical line comprising a first fiber optic cable and a second fiber optic cable attached at one end to the interrogator. The DAS may further include a downhole fiber attached to the umbilical line at the end opposite the interrogator and a light source disposed in the interrogator that is configured to emit a plurality of coherent light frequencies into the umbilical line and the downhole fiber. The method may include generating interferometric signals of the plurality of frequencies of backscattered light that have been received by the photo detector assembly and processing the interferometric signals with an information handling system.

Abstract: In some embodiments, an archipelago model is provided for distributed execution of evolutionary computing techniques. In some embodiments, an archipelago manager computing device manages a centralized archipelago management queue, and provides population subsets to a plurality of island computing devices. The archipelago manager computing device receives candidate solutions from the island computing devices, stores the candidate solutions in the archipelago management queue, and transmits candidate solutions from the archipelago management queue to the island computing devices in order to exchange candidate solutions between the island computing devices. The use of an archipelago management queue allows transfer of candidate solutions between different island computing devices, is robust to failure of any given island computing device, and does not require homogeneity within the plurality of island computing devices.

Abstract: In some embodiments, an archipelago model is provided for distributed execution of evolutionary computing techniques. In some embodiments, an archipelago manager computing device manages a centralized archipelago management queue, and provides population subsets to a plurality of island computing devices. The archipelago manager computing device receives candidate solutions from the island computing devices, stores the candidate solutions in the archipelago management queue, and transmits candidate solutions from the archipelago management queue to the island computing devices in order to exchange candidate solutions between the island computing devices. The use of an archipelago management queue allows transfer of candidate solutions between different island computing devices, is robust to failure of any given island computing device, and does not require homogeneity within the plurality of island computing devices.

Abstract: A method of perforating a wellbore is provided. The method includes generating a shockwave that propagates throughout said wellbore by firing a perforation device at a perforating direction, and measuring the shockwave at a fiber optic cable in the wellbore using the fiber optic cable. The method further includes determining an orientation of the fiber optic cable relative to the perforating direction based on the shockwave and the perforating direction, and changing the perforating direction based on the orientation of said the optic cable for a subsequent perforation of the wellbore to minimize damage to the fiber optic cable during the subsequent perforation. The fiber optic cable is an existing cable that has been deployed before the method starts.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for simulating a concrete mixture.

Abstract: A system for downhole measurements. The system may comprise a fiber optic cable that further comprises a transmission fiber and a return fiber. Additionally, the system may comprise a passive optical device optically connected to the transmission fiber and the return fiber, a first wavelength division multiplexer (WDM) optically connected to the transmission fiber, and a second WDM optically connected to the return fiber. The system may further comprise a transmitter and a first Raman pump optically connected to the first WDM and a receiver and a second Raman pump optically connected to the second WDM.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for receiving, at each of multiple time steps, sensor data captured by an onboard sensor of a drone at the time step, providing an input including the sensor data to a drone control neural network having a brain emulation sub-network with an architecture that is specified by synaptic connectivity between neurons in a brain of a biological organism, including instantiating a respective artificial neuron in the brain emulation sub-network corresponding to each of multiple biological neurons in the brain of the biological organism, and instantiating a respective connection between each pair of artificial neurons, processing the input using the drone control neural network to generate an action selection output, and selecting an action to be performed to control the drone at the time step based on the action selection output.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for receiving a representation of an image captured by an onboard camera of a drone and providing the representation of the image to a drone image processing neural network having a brain emulation sub-network with an architecture that is specified by synaptic connectivity between neurons in a brain of a biological organism, including instantiating a respective artificial neuron corresponding to each biological neuron of multiple biological neurons, and instantiating a respective connection between each pair of artificial neurons that correspond to a pair of biological neurons that are connected by a synaptic connection, and processing the representation of the image using the drone image processing neural network having the brain emulation sub-network to generate a network output that defines a prediction characterizing the image captured by the onboard camera of the drone.

Abstract: A distributed acoustic system may comprise an interrogator which includes a single photon detector, an umbilical line comprising a first fiber optic cable and a second fiber optic cable attached at one end to the interrogator, and a downhole fiber attached to the umbilical line at the end opposite the interrogator. A method for optimizing a sampling frequency may comprise identifying a length of a fiber optic cable connected to an interrogator, identifying one or more regions on the fiber optic cable in which a backscatter is received, and optimizing a sampling frequency of a distributed acoustic system by identifying a minimum time interval that is between an emission of a light pulse such that at no point in time the backscatter arrives back at the interrogator that corresponds to more than one spatial location along a sensing portion of the fiber optic cable.

Abstract: According to a first aspect, there is provided an adaptive cooking device that includes: a cooking chamber configured to receive a food product, an antenna assembly, an RF power source, a sensor assembly coupled to the cooking chamber and comprising a plurality of sensors, each sensor configured to obtain a measurement characterizing a cooking process in real-time, and one or more sensors of the plurality of sensors configured to obtain a different type of the measurement, and a controller coupled to the antenna assembly, the sensor assembly, and the RF power source, wherein the controller is configured to: receive the measurement characterizing the cooking process from the sensor assembly, process the measurement to determine a modified cooking process, and operate the antenna assembly and the RF power source in accordance with the modified cooking process in real-time.

Abstract: A method of perforating a wellbore is provided. The method includes generating a shockwave that propagates throughout said wellbore by firing a perforation device at a perforating direction, and measuring the shockwave at a fiber optic cable in the wellbore using the fiber optic cable. The method further includes determining an orientation of the fiber optic cable relative to the perforating direction based on the shockwave and the perforating direction, and changing the perforating direction based on the orientation of said the optic cable for a subsequent perforation of the wellbore to minimize damage to the fiber optic cable during the subsequent perforation. The fiber optic cable is an existing cable that has been deployed before the method starts.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for neuroanatomical tract visualization using synaptic connectivity graphs. In one aspect, a method comprises: presenting, to a user and through a display, a representation of a synaptic connectivity graph representing synaptic connectivity between neurons in a brain of a biological organism; receiving, from the user, data specifying a seed neuron in the brain; identifying a neuroanatomical tract corresponding to the seed neuron in the brain; and presenting, to the user and through the display, a geometric representation of at least a portion of the brain of the biological organism that visually distinguishes the neuroanatomical tract corresponding to the seed neuron at neuronal resolution.

Abstract: Faded channels in a distributed acoustic sensing system can be mitigated using a phase modulator. A first pulse and a second pulse of an optical signal can be determined. A phase modulator can modulate the first pulse to have a different wavelength than the second pulse. The first pulse can be launched into a sensing fiber that extends into a wellbore. A first backscattered signal can be received from the sensing fiber in response to the first pulse being launched into the sensing fiber. The second pulse can be launched into the sensing fiber and a second backscattered signal can be received from the sensing fiber. Data about an environment of the wellbore can be determined by processing the first backscattered signal and the second backscattered signal to compensate for fading in the first backscattered signal or the second backscattered signal.

Abstract: A distributed acoustic system (DAS) method and system. The system may comprise an interrogator and an umbilical line comprising a first fiber optic cable and a second fiber optic cable attached at one end to the interrogator. The DAS may further include a downhole fiber attached to the umbilical line at the end opposite the interrogator and a light source disposed in the interrogator that is configured to emit a plurality of coherent light frequencies into the umbilical line and the downhole fiber. The method may include generating interferometric signals of the plurality of frequencies of backscattered light that have been received by the photo detector assembly and processing the interferometric signals with an information handling system.

Abstract: A distributed acoustic system (DAS) with an interrogator, an umbilical line attached at one end to the interrogator, and a downhole fiber attached to the umbilical line at the end opposite the interrogator. A method for optimizing a sampling frequency may begin with identifying a length of a fiber optic cable connected to an interrogator, identifying one or more regions on the fiber optic cable in which a backscatter is received, and optimizing a sampling frequency of a distributed acoustic system (DAS) by identifying a minimum time interval that is between an emission of a light pulse such that at no point in time the backscatter arrives back at the interrogator that corresponds to more than one spatial location along a sensing portion of the fiber optic cable.

Abstract: In some embodiments, an archipelago model is provided for distributed execution of evolutionary computing techniques. In some embodiments, an archipelago manager computing device manages a centralized archipelago management queue, and provides population subsets to a plurality of island computing devices. The archipelago manager computing device receives candidate solutions from the island computing devices, stores the candidate solutions in the archipelago management queue, and transmits candidate solutions from the archipelago management queue to the island computing devices in order to exchange candidate solutions between the island computing devices. The use of an archipelago management queue allows transfer of candidate solutions between different island computing devices, is robust to failure of any given island computing device, and does not require homogeneity within the plurality of island computing devices.

Abstract: A distributed acoustic system may comprise an interrogator which includes a single photon detector, an umbilical line comprising a first fiber optic cable and a second fiber optic cable attached at one end to the interrogator, and a downhole fiber attached to the umbilical line at the end opposite the interrogator. A method for optimizing a sampling frequency may comprise identifying a length of a fiber optic cable connected to an interrogator, identifying one or more regions on the fiber optic cable in which a backscatter is received, and optimizing a sampling frequency of a distributed acoustic system by identifying a minimum time interval that is between an emission of a light pulse such that at no point in time the backscatter arrives back at the interrogator that corresponds to more than one spatial location along a sensing portion of the fiber optic cable.

Abstract: Distributed The disclosed embodiments include distributed acoustic sensing (DAS) systems, methods to improve DAS properties of optical fibers, and optical fibers having improved DAS properties. In one embodiment, the system includes an optoelectronic device operable to generate optical pulses. The system also includes an optical fiber having a first end and a second end. The optical fiber is formed from a material having a Rayleigh back-scattering coefficient, and is operable to transmit optical pulses from the first end towards the second end and to reflect a first portion of the optical pulses towards the first end. The system further includes perturbations that are selectively imprinted on the optical fiber, where the perturbations are compatible with a range of wavelengths and are operable to reflect a second portion of the optical pulses towards the first end of the optical fiber if a wavelength of the optical pulses is within the range.