Abstract:
Various technologies and techniques are disclosed for calculating and evaluating the behavior of recommendation systems. Accuracy measures are computed for a plurality of items in a real recommendation system, an ideal recommendation system, and a popularity-based baseline recommendation system. The accuracy measures for the plurality of items are presented to a user so the user can evaluate a performance of the real recommendation system in comparison to the ideal recommendation system and the popularity-based baseline recommendation system. The accuracy measures can be presented in an interactive graph.
Abstract:
A dispersion compensation method and a fiber transmission system are disclosed, pertaining to the field of fiber communications. The dispersion compensation method includes: after performing electrical pre-compensation processing on a digital transmit signal, the transmitting end controls the electrical/optical converting module to output a distorted optical signal; after receiving the optical signal, the receiving end performs post-compensation processing after converting the optical signal into an electrical signal, or converts the optical signal into an electrical signal after performing post-compensation processing on the optical signal. The fiber transmission system includes: a pre-compensation signal processing module, an optical source, an electrical/optical converting module, a fiber transmission line, an optical/electrical converting module, and a post-compensation processing module. With the technical solution of the present disclosure, the non-linear effect may be suppressed, and a flexible dispersion compensation solution may be provided for a dynamically configurable network.
Abstract:
A method and system that aggregates data associated with one or more entities from different data sources are provided. The data sources include documents, web pages, or images that have information about one or more entities. The information is extracted from the data sources based on criteria that define the entities. The extracted information is utilized to generate a hash identifier that corresponds to each entity and one or more storage locations. The one or more storage locations and associated hash identifiers are utilized to store the extracted information corresponding to the entities, and the extracted information for each entity is structured as a virtual page that is stored in an index having references to the data sources.
Abstract:
Plasma nitridation, in place of plasma oxidation, is used for the formation of a CCP layer. Al, Mg, Hf, etc. all form insulating nitrides under these conditions. Maintaining the structure at a temperature of at least 150° C. during plasma nitridation and/or performing post annealing at a temperature of 220° C. or higher, ensures that no copper nitride can form. Additionally, unintended oxidation by molecular oxygen of the exposed magnetic layers (mainly the pinned and free layers) is also avoided
Abstract:
This disclosure concerns methods for fabrication of integrated high speed optoelectronic devices. In one example of such a method, a device region that includes a top surface and a bottom surface is formed on a top surface of a substrate. The device region may take the form of an optical emitter, such as a VCSEL, or a detector, such as a photodiode. Next, an isolation region is formed that is configured such that the device region is surrounded by the isolation region. A superstrate is then disposed on the top surface of the device region. Finally, a micro-optical device, such as a lens, is placed on a top surface of the superstrate.
Abstract:
Improved CPP GMR devices have been fabricated by replacing the conventional seed layer (typically Ta) with a bilayer of NiCr on Ta, said seed being deposited on the NiFe layer that constitutes a magnetic shield. Additional improvement was also obtained by replacing the conventional non-magnetic spacer layer of copper with a sandwich structure of two copper layers with an NOL (nano-oxide layer) between them. A process for manufacturing the devices is provided.
Abstract:
A housing for opto-electronic array devices. The housing includes a base and walls that form a region that receives an opto-electronic semiconductor array. Conductive traces are disposed on a wall such that a front part of the traces are exposed for external electrical connections, while the back part is exposed for internal electrical connections. A transparent substrate having a plurality of micro-lenses cover the base, walls and opto-electronic semiconductor array device. Each micro lens is beneficially made from optical epoxy that is deposited by an ink-jet nozzle. The base and walls are beneficially comprised of a ceramic.
Abstract:
Methods for sealing or passivating the edges of chips such as vertical cavity surface emitting lasers (VCSEL) is disclosed. One method includes oxidizing the edges of die at the wafer level prior to cutting the wafer into a plurality of die. This may be accomplished by etching a channel along the streets between die, followed by oxidizing the channel walls. The oxidation preferably oxidizes the aluminum bearing layers that are exposed by the channel walls inward for distance. Aluminum bearing layers, including AlAs and AlGaAs, may be oxidized to a stable native oxide that is resistant to further oxidation by the environment. After oxidation, the wafer can be cut along the channels into a number of die, each having a protective oxide layer on the side surfaces.
Abstract:
An opto-electronic integrated circuit device includes top emitter/detector devices on a substrate. The top emitter/detector devices have top and bottom sides. The top emitter/detector devices are capable of emitting and detecting light beam from the top side, and have top contact pads on the top side. An optically transparent superstrate is attached to the top side. Micro-optic devices such as lenses can be attached to the superstrate. Top contact pads are connected to bottom contact pads. The bottom contact pads are attached to matching pads of an integrated circuit chip to produce an opto-electronic integrated circuit.
Abstract:
An oil-based mud formation imaging tool for measuring electrical properties of surrounding formation includes at least one base plate, a first port and a second port deployed on the base plate, surface conductors covering both sides of the base plate, and inside conductors deployed in the first port and the second ports and with gaps from the edges of the first and second ports. The first port is fed with electromagnetic signals by a waveguide and a coupling is formed between the imaging tool and the surrounding formation accordingly. Resonance signals are induced at the second port to be used to compute corresponding formation resistivity and dielectric constant. A corresponding imaging method is also provided.