摘要:
According to embodiments of the present invention, a method of interconnecting nanowires is provided. The method includes providing a plurality of nanowires, providing a plurality of nanoparticles, and fusing the plurality of nanoparticles to the plurality of nanowires to interconnect the plurality of nanowires to each other via the plurality of nanoparticles. According to further embodiments of the present invention, a nanowire network and a transparent conductive electrode are also provided.
摘要:
A system for providing underwater communication using orbital angular momentum (OAM) includes a transmitter that processes input data to be transmitted using pre-coding information based on current transmission channel conditions to maximize data rate based on channel conditions. A receiver receives a transmitted multiplexed OAM optical signal and analyzes the received signal for channel state information. The channel state information is used to determine a set of pre-coding values that allow the transmitter to pre-code the input data to maximize the data rate based on current channel conditions. The pre-coding values are mapped to a codebook entry which identifies the pre-coding values. The codebook entry is transmitted from the receiver to the transmitter. The transmitter uses the received codebook entry to identify pre-coding values used to process subsequent input data to be transmitted in order to enhance data rate across the transmit channel.
摘要:
Projected synthetic vision methods, systems and computer readable media are disclosed. For example, a system can include one or more sensors, a terrain database, and a projected synthetic vision controller coupled to the one or more sensors and the terrain database, the projected synthetic vision controller configured to generate and project synthetic vision images based on aircraft position, terrain information and aviator boresight information. The system can also include one or more projectors coupled to the projected synthetic vision controller.
摘要:
A conduction-cooled card assembly (100) is disclosed that includes a conduction-cooling frame (102), a printed wiring board (104) mounted on the frame, and a wedgelock fastener (122). The conduction- cooling frame has a thermal management interface (124) adapted to transfer heat from the frame to a chassis (128), and the wedgelock fastener is adapted to press the thermal management interface of the conduction-cooling frame against a rail of the chassis.. The assembly also has one or more of the following characteristics: (a) the thermal management interface of the conduction-cooling frame is made primarily of a first material and a portion of the thermal management interface that is adapted to engage the wedgelock fastener or the rail of the chassis is made of a second material that is softer than the first material, and (b) the wedgelock fastener is made primarily of a first material and a portion of the wedgelock fastener that is adapted to engage the thermal management interface or another rail of the chassis is made of a second material that is softer than the first material. A chassis for conduction-cooled card assemblies is also disclosed which comprises a housing and at least first and second rails within the housing that are adapted to receive a conduction-cooled card assembly therebetween. At least one of the first and second rails is made primarily of a first material and has a surface portion made of a second material that is softer than the first material.
摘要:
A infusion reactor (110) includes two internal magnetic coils(140) suspended within an enclosure (120), a center magnetic coil (130) coaxial with the two internal magnetic coils (140) and located proximate to a midpoint of the enclosure, a plurality of encapsulating magnetic coils (150) coaxial with the internal magnetic coils, and two mirror magnetic coil (160) coaxial with the internal magnetic coils. The encapsulating magnetic coils (160) preserve the magnetohydrodynamic (MHD) stability of the fusion reactor by maintaining a magnetic wall that prevents plasma within the enclosure from expanding.
摘要:
A method of separating an atomically thin material, such as graphene, from a substrate, such as copper, is disclosed. The method provides a composite sheet, such as a graphene-copper sheet, and then applies hypersonic waves to the composite sheet so as to break the bonds therebetween and separate a graphene sheet from the copper substrate. A system to implement the separation is also disclosed.
摘要:
Methods and apparatus for detecting a swarm attack based on a plurality of convergence hypotheses related to correlated movements of entities in an area of interest. Projected tracks for the entities are determined based on position reports received for the entities. At least one of the convergence hypotheses are updated based, at least in part on the projected tracks and a convergence hypotheses is output when a score assigned to the hypothesis exceeds a threshold value.
摘要:
Apparatus and method for high-power multi-function millimeter-wavelength (THz-frequency) signal generation using OPO and DFG in a single cavity. In some embodiments, the OPO-DFG cavity includes an optical parametric oscillator (OPO) non-linear material that receives pump light IP having pump-light frequency and generates two different lower intermediate frequencies of light - an OPO-signal beam IS and a spatially/temporally overlapping OPO-idler beam II. A difference-frequency generator non-linear material then receives the two intermediate-frequency beams II and IS, and the DFG then generates a THz-frequency output signal that has a frequency equal to the difference between the two intermediate frequencies. In some embodiments, a single-piece crystal of non-linear material is used for both OPO and DFG functions. Some embodiments use a bow-tie ring having four mirrors that define the optical path: an IP-beam-entry mirror, an IP-light-extraction mirror to remove unconverted IP-beam, an II-beam-extraction mirror, and an IS-beam-extraction mirror, and a fifth ITHz-beam-extraction mirror.
摘要:
A thermal-management optical-fiber packaging system that includes an optical fiber and a temperature-management device configured to remove excess heat from the optical fiber. In some embodiments, the temperature-management device includes a first housing having a first outer-perimeter surface and an inner volume facing a first inner surface (wherein the inner volume has a length), a plurality of fiber-support members coupled to, and/or integral with, the first inner surface of the first housing, wherein each of the fiber-support members has one or more small-area-of-contact supports arranged along the length of the inner volume, and wherein each small-area-of-contact support is configured to provide a small area (e.g., a point) of contact with the optical fiber, and wherein the optical fiber follows a coiled path around the inner volume. A thermal-management material surrounds the optical fiber except at those locations where the optical fiber contacts the fiber-support members.
摘要:
A method and system that can be used for scanning underwater structures. The method and system allow a user to gain a better understanding of an underwater structure. For example, the method and system detect change(s) to an underwater structure. An acoustic sonar wave is directed toward an underwater structure, and a reflected acoustic sonar wave is received and processed to produce a three dimensional image. Data points of this three-dimensional image of the underwater structure are aligned to a pre-existing three dimensional model of the underwater structure. A change detection model is generated based on the aligned 3D images, and the change detection model is compared to the pre-existing three dimensional model of the underwater structure. Based on the comparison, occurrences of structural changes in the underwater structure are detected.