摘要:
A system and method are disclosed for computing a vehicle's motion in four dimensions (e.g., three spatial dimensions and time) and reliably predicting the vehicle's arrival time at a predetermined location, by providing a graphical display to an operator of the vehicle's progress that enables the operator to adjust the vehicle's movement and achieve the desired arrival time. Specifically, a system and method are disclosed for computing the movement of an aircraft in four dimensions, predicting its arrival time at a predetermined waypoint, and displaying (in a highly intuitive format) the aircraft's progress in achieving that desired arrival time. The pilot can then adjust the movement (e.g., speed) of the aircraft in accordance with the parameter(s) displayed, in order to achieve the desired arrival time. Thus, for example, numerous aircraft could be scheduled to arrive at a specific final approach waypoint at a predetermined rate (e.g., one aircraft per minute), which would enable the traffic controllers to optimize runway traffic without having to stack the aircraft in holding patterns and thereby waste fuel. Notably, although an example of an aircraft navigation and control system and method is disclosed, the system and method can be implemented for any type of vehicle (e.g., aircraft, spacecraft, ship, submarine, bus, train, automobile, etc.) whose operator desires to reach a particular location at a specified time.
摘要:
The present invention provides a method of authenticating a pair of correspondents in a communication system, such as in a mobile phone network by utilizing a blend of public-key cryptography and symmetric cryptography. Each session between the mobile phone and the network consists of public-key based mutual authentication and key exchange followed by symmetric-key secure data exchange.
摘要:
A terminal module is provided for coupling between a printed circuit board and a relatively movable component. The module includes an elongated dielectric housing defining a longitudinal axis extending between opposite ends of the housing. One opposite end of the housing has a coupling for interengagement with the relatively movable component and for allowing relative movement between the component and the printed circuit board. A slot extends axially into the housing from an open end thereof at an opposite end of the housing for embracing an edge of a printed circuit board inserted axially into the slot. A conductive terminal is mounted on the housing through an open side of the housing generally parallel to the slot. The terminal has a contact portion extending into the slot for engaging an appropriate circuit trace on the printed circuit board.
摘要:
A lever type electrical connector assembly includes a first connector having an actuating lever pivotally movably mounted thereon for movement between a preload position and a mating position. The actuating lever includes a cam groove formed therein. A latch is provided between the first connector and the actuating lever for holding the actuating lever in the preload position. A second connector includes a cam follower projection to be engaged in the cam groove of the actuating lever, whereby the connectors are mated and unmated in response to rotation of the actuating lever. A release is provided on the second connector for releasing the latch automatically as the connectors are mated to allow the actuating lever to move from the preload position to the mating position.
摘要:
Novel compositions comprising a high concentration of poly(2,6-benzothiazole) and certain polyphosphoric acids are prepared. Such compositions are optically anisotropic (liquid crystalline), capable of exhibiting excellent cohesive strength, and are especially suited to the production of high molecular weight ordered polymer fibers by dry-jet wet spinning. These liquid crystalline compositions are capable of being drawn through long air gap distances and spun at exceptionally high spin draw ratios. Fibers, films and other articles formed from these liquid crystalline compositions exhibit exceptionally high physical and heat resistant properties.
摘要:
Methods are provided for presenting procedure information for an airport on a display device onboard an aircraft. A method comprises displaying a map on a display device and displaying a briefing panel overlying a portion the map. The briefing panel includes a plurality of segments, wherein each segment is associated with a type of procedure information for the airport.
摘要:
A method of providing certificate issuance and revocation checks involving mobile devices in a mobile ad-hoc network (MANET). The wireless devices communicate with each other via Bluetooth wireless technology in the MANET, with an access point (AP) to provide connectivity to the Internet. A Certificate authority (CA) distributes certificates and certification revocation lists (CRLs) to the devices via the access point (AP). Each group of devices has the name of the group associated with the certificate and signed by the CA. A device that is out of the radio range of the access point may still connect to the CA to validate a certificate or download the appropriate CRL by having all the devices participate in the MANET.
摘要:
Methods and systems are provided for presenting content on a display device onboard an aircraft. A method comprises displaying, on the display device, information corresponding to a first procedure and displaying an annotation associated with the first procedure on the display device. The first procedure is associated with an airport and prescribes operation of the aircraft in a vicinity of the airport, and the annotation comprises user-defined information pertaining to the first procedure.
摘要:
Methods and systems are provided for indicating whether an aircraft is below a designated minimum safe altitude level for an altitude sector. A method comprises displaying a graphical representation of a first sector on a display device associated with the aircraft. The first sector corresponds to a geographic area having a first minimum altitude criterion. If a current altitude of the aircraft is below the first minimum altitude criterion, the method continues by displaying the graphical representation of the first sector using a first visually distinguishing characteristic chosen to indicate that the aircraft is below the designated altitude level for the first sector.
摘要:
An airport lighting aid simulation system comprises a data storage unit configured to store lighting aid data relating to a plurality of airports. The lighting aid data indicates a type and a location of an airport lighting aid at a runway at each airport. The system also includes a display unit and a processing unit operatively connected to both the data storage device and the display unit. The processing unit is configured to receive an input signal indicative of a target runway, to retrieve a sub-set of the lighting aid data from the data storage unit, the sub-set being indicative of a target runway lighting aid, and to control the display unit to display a target runway description. The system enables a pilot to determine whether a visible runway is the target runway by comparing a view from an aircraft as the aircraft approaches the visible runway with the target runway description.