摘要:
Multiple input multiple output (MIMO) systems are able to provide wireless communications at increased data rates. These systems involve using a plurality of antennas on both the transmitter and receiver and the problem of how to accommodate such structures in user terminals, which are often required to be hand held then arises. An antenna arrangement which is suitable for MIMO communications and which can be incorporated into a user terminal such as a personal digital assistant (PDA) is described. A pair of co-polarised umbrella monopoles and a slot antenna are incorporated into a flap which extends at approximately 90° to the body of the PDA. A fourth monopole is mounted and protrudes from the PDA itself.
摘要:
An automated teller machine (10) comprises a fascia (12) having a check entry/exit slot (56), and a check processing module (60) for processing checks entered via the slot (56). The terminal (10) includes a control means (86), biometric data capture means (112, 156, 158), a printer (74) and a check transport mechanism (70) for transporting checks between the slot (56) and the printer (74). The control means is arranged to cause the printer (74) to print a representation of a biometric characteristic of a user onto a check during an attempt to deposit the check in the terminal (10).
摘要:
A telecommunications device that is configured to form a connection with another telecommunications device without user intervention; select software that is available on that other device, and receive a copy of that software.
摘要:
Fastening systems for releasably securing two components together include tab and landing members. In a first arrangement, a Z-fold tab member has combined mechanical and adhesive engagement. A second arrangement includes adjacent adhesive and cohesive contact portions. A third arrangement contoured apertures and mechanical engaging elements. A fourth arrangement includes apertures and mechanical engaging elements sized and arranged so that each aperture receives a plurality of mechanical engaging elements. A fifth arrangement includes tab and landing members that cooperate to provide a color indicia of secure adhesive engagement.
摘要:
A flat-plate dual band antenna element is described which comprises two superposed sets of excitation probes and apertures each of which operates in a different frequency band. These antenna elements are used in an array together with a plurality of single band elements to create a flat-plate, dual band array antenna that is low cost and permits monopulse alignment methods and distributed power amplification to be used. The geometric arrangement of the antenna elements is such that distribution networks for the excitation probes can be accommodated in the limited space available. Dual band flat-plate array feeds for a reflector antenna are also described. These use either a combination of the above mentioned dual band antenna elements and single band antenna elements or alternatively, two sizes of single band antenna elements. The geometric arrangement of the antenna elements in these array feeds is such that transmit and receive beams are provided that have co-incident phase centers and approximately equal beamwidths.
摘要:
A customer's mobile device comprises a camera and a processor. The camera is used to scan a two-dimensional barcode which has encoded within it transaction details and ancillary information relating to purchases made by a customer in their receipted transaction.
摘要:
A method of managing lost returns in a wellbore is disclosed. The method includes contacting a filter cake with a treating fluid to remove metallic weighting agents from the filter cake, wherein the filter cake is disposed on a face of a formation fracture in the wellbore. The method also includes contacting the filter cake with a proppant slurry, wherein the proppant slurry contacts the filter cake concurrently with the treating fluid or after the treating fluid contacts the filter cake. This method may include increasing the filter cake permeability and may utilize a barite removal agent, such as a chelation agent. At least one related wellbore management method is disclosed, which provides for creating a fracture in the wellbore and propping open the fracture to increase wellbore integrity to utilize higher weight drilling fluids and prevent fractures from forming further down the wellbore.
摘要:
The invention is directed to methods and apparatus for transmitting data between a first node and a second node in a communications network, for example a wireless network. The method comprises the steps of selecting a transmission channel from a predetermined set of transmission channels according to probability information and transmitting data using the selected channel. The probability information is based on a determination of a characteristic of previous transmissions using each of said set of channels. The invention is also directed to a method of selecting a channel at a node in a communications network for communication with a second node.