摘要:
An integrated circuit is provided for use with a supply voltage and which includes an input/output (I/O) circuit with an output driver with a pull-up transistor and a pull-down transistor and which includes an I/O pin connected to receive output signals from the output driver and connected to provide input signals to the integrated circuit, the protection circuit comprising: bias circuitry that imparts a bias voltage to the pull-up transistor so as to substantially prevent leakage current when a voltage applied externally to the I/O pin rises above the supply voltage; a switch connected to conduct current from the I/O pin to the supply voltage when the switch is turned on and to block current flow from the I/O pin to the supply voltage when the switch is turned off; and voltage clamp circuitry connected to clamp voltage on the I/O pin to the supply voltage when the switch is turned on; and programming circuitry which is programmable to turn the switch on and off.
摘要:
A telecommunications network comprising a plurality of nodes interconnected via communications paths is configured by the determination of a routing plan for the traffic carried by the network. A set of possible paths, e.g. the eight shortest paths between each pair of network nodes is determined, and each path is allocated a digital code characteristic of that path identity. Groups of paths are selected, each group comprising one path from each set, and for each said group being characterised by a bit string comprising the digital codes of the paths comprising that group. These bit strings are then used as starting values or chromosomes in a genetic algorithm search procedure to generate and evaluate new path groups so as to determine an optimum combination or routing plan of paths between the network nodes.
摘要:
Mining apparatus is disclosed in which a cutting wheel supporting a plurality of roller-cutters rotates about a horizontal axis and is supported on a slewing boom for cutting a tunnel with a flat floor and roof and elliptical walls as it slews across a mining face. The slewing boom is supported on a main beam assembly, the front end of which rests on powered crawler tracks and the rear end of which passes through a gripper assembly which may be clamped between the floor and roof of the tunnel, and against which the main beam assembly may be urged forward for engaging the roller-cutters with the mining face. A preload crawler is urged against the roof of the tunnel above the powered crawler tracks to locate the main beam assembly rigidly relative to the tunnel such that the roller-cutters may cut the rock in the mining face with minimal loss of cutting force due to vibration.
摘要:
A tunnel boring machine including the following elements: (a) a full face rotary cutterhead; (b) a cutterhead support on which the cutterhead is mounted; (c) a gripper system carried by a gripper support frame for reacting thrust, steering, roll correction, and torque forces; (d) a conveyor system for transporting muck from behind the rotary cutterhead to a dump point rearwardly of the machine; (e) primary propel cylinders for advancing the cutterhead which are mounted between the gripper support frame and the cutterhead support, the primary propel cylinders consisting of a series of at least three pairs of double acting hydraulic cylinders arranged annularly in equally spaced apart locations and in a series of V-shaped configurations between the gripper support frame and the cutterhead support, each such pair of primary propel cylinders having an included angle between the cylinders of about 15.degree. and 60.degree. and with a line bisecting the included angle between the cylinders extending generally parallel to the longitudinal centerline of the machine; and (f) a hydraulic control system for controlling the pairs of primary propel cylinders to effect (1) axial forward thrust on the cutterhead by simultaneous actuation of all the primary propel cylinders while transmitting the reaction torque exerted on the cutterhead support by rotation of the cutterhead, (2) steering of the cutterhead support and the cutterhead by selective actuation of only a portion of the primary propel cylinders, and (3) roll corrections of the cutterhead support and the cutterhead by selective actuation of alternate members of the primary propel cylinders.
摘要:
The armored door of a field artillery ammunition support vehicle has a door opener on each side of the door, the door being hinged at the top to the top of the vehicle for movement into raised substantially horizontal position to supply added protection for crew members. Each door opener includes a cylinder pivoted at its bottom to the floor of the vehicle with a rod actuated compression spring in the cylinder. The upper end of the rod is pivoted to the end of an arm and the arm is in turn pivoted to an extension from the door opening into the vehicle body. The other end of the arm is pivoted to a link which in turn is pivoted at its other end to the interior of the door. On opening of the door the spring which is compressed assists in raising the weight of the door and on closing of the door the spring compresses countering the downward action of the weight of the door. In door close position the four pivots are aligned on the axis of the cylinder and rod to assist in holding the door in closed position. The door may be provided with conventional manually actuable locking means and be extended at its bottom by a pair of doors hinged to the vehicle body on vertical axes for lateral outward movement for further protection of the crew and ship-lap joints are provided between the doors for waterproofness.
摘要:
According to this invention there is provided a method of processing material such as organically coated waste and organic materials including biomass, industrial waste, municipal solid waste and sludge, the method comprising: attaching a material container cartridge containing material to be processed to a processing chamber; heating the material in a reduced oxygen atmosphere in the processing chamber to produce gas; channeling the gas from the processing chamber to a treatment chamber in which they are heated to destroy any VOC's therein; recirculating gas from the treatment chamber back into the processing chamber; and in a first mode of operation modifying the moisture content of the gas recirculating from the treatment chamber to the processing chamber by passing it through a second material container cartridge containing material to be processed.
摘要:
The present invention is related to a method for reducing the level of hepcidin in a body fluid from a subject, comprising a) providing a nucleic acid molecule capable of binding to hepcidin, and b) bringing the nucleic acid molecule into contact with a body fluid under conditions that allow for the binding of hepcidin to the nucleic acid molecule, thereby forming a complex of hepcidin and the nucleic acid molecule, and c) removing the complex from the body fluid or removing the hepcidin from the body fluid.
摘要:
Aspects of the invention include 2′ protected nucleoside monomers that are protected at the 2′ site with thiocarbon protecting groups. Thiocarbon protecting groups of interest include thiocarbonate, thionocarbonate, dithiocarbonate groups, as well as thionocarbamate protecting groups. Aspects of the invention further include nucleic acids that include the protecting groups of the invention, as well as methods of synthesizing nucleic acids using the protecting groups of the invention.
摘要:
The present invention is related to a method for determining the nucleotide sequence of a nucleic acid molecule comprising the following steps: a) providing a plurality of molecules of the nucleic acid molecule having at least one modification; b) cleaving at random the plurality of modified nucleic acid molecules thus providing modified nucleic acid molecule fragments and non-modified nucleic acid molecule fragments; c) separating the modified nucleic acid molecule fragments from the non-modified nucleic acid molecule fragments; d) separating or resolving the modified nucleic acid molecule fragments according to their length, mass and/or charge, whereby such separating or resolving generates a pattern of modified nucleic acid fragments; and e) optionally visualizing the pattern of modified nucleic acid fragments.
摘要:
A programmable logic device (“PLD”) is augmented with programmable clock data recover (“CDR”) circuitry to allow the PLD to communicate via any of a large number of CDR signaling protocols. The CDR circuitry may be integrated with the PLD, or it may be wholly or partly on a separate integrated circuit. The circuitry may be capable of CDR input, CDR output, or both. The CDR capability may be provided in combination with other non-CDR signaling capability such as non-CDR low voltage differential signaling (“LVDS”). The circuitry may be part of a larger system.