Abstract:
An embodiment of said method comprises coding a binary information sequence (SI) to be transmitted, in the form of a second binary signal (SM) by differential coding; filtering the second binary signal (SM) to obtain a duobinary signal (SMF) having three significant values (-a, O+/- epsilon , +a) and a smaller bandwidth; modulating an optical carrier in accordance with the values taken by the filtered signal (SMF), by providing the modulated carrier with a maximum amplitude to represent the maximum value (+a) and the minimum value (-a) of the duobinary signal (SMF), by offseting the phase of the modulated carrier by theta 1 and by theta 2 = theta 1 + 180 DEG respectively; and providing the modulated carrier with a minimum amplitude to represent the values (O+/- epsilon ) which are close to O. The method of the invention is suitable for long distance fibre-optics transmissions.
Abstract:
The protocol consists, in particular, in updating, in all the telecommuniction network terminals and nodes involved in a given call, a matrix corresponding to the state of each terminal (TA, TB, TC) which participates in the call being processed, in relation to each connection (C1, C2, C3) established for the call being processed. The matrix distinguishes a plurality of fine states within the active state of each of the terminals and nodes involved in said call. The matrix is generally updated by means of a message which is sent to the whole network when an operation is in fact performed in one of the terminals, and when this operation modifies the state of the call, or the state of a connection estblished for this call, or the state of a terminal participating in said call.
Abstract:
A synchronizing device for terminal equipment in an asynchronous transfer mode telecommunications network, comprising a device (7) for filtering the transfer jitter which is introduced by such a network and affects the network-routed data reception rate through said equipment, and for matching the local clock signal frequency supplied by a local clock within said equipment to the frequency of a signal output by said filtering device. The synchronizing device comprises a buffer memory (MTB1, MTB2) into which said data are entered as they are received by said equipment, and a device (5, 5') for reading said buffer memory as said signal is output by said filtering and matching device, with a delay relative to the entry of said data which is determined in such a way as to minimize any risk arising from an insufficient restoration flow of read-out data during the response time of said filtering and matching device, while keeping within an acceptable data restoration delay margin.
Abstract:
Vacuum pumping group comprising a secondary pumping subassembly (6) rotationally driven by an electric motor M2 and sucking from the housing to be vacuumed (1), and a primary pumping subassembly (2) rotationally driven by an electric motor M1 and of which the suction is connected to the exhaust of the secondary pumping subassembly (6), characterized in that it is comprised of an electric control circuit (7) for controlling the rotation speed of the electric motor M1 as a function of the current intensity I2 of the electric motor M2.
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus capable of surely cooling an optical fiber drawn from a glass preform in succession up to a temp. at which there are no problems for coating the fiber even if a production speed is high and a cooling section is short and a method therefor. SOLUTION: A glass body 3 is put into a heating furnace 1 for drawing and one of its terminals is heated to a drawing temp. and is drawn out to form the fiber 5. The fiber 5 is cooled in a cooling device 7 having the cooling section 11. The surface of the cooled fiber 5 is coated with at least one layer in a coating device 15. Even if the drawing speed is high, the effective cooling of the optical fiber 5 is surely executed in the cooling device 7 and, therefore, before the fiber 5 enters its cooling section 1, the fiber 5 is introduced through the inside of a separating chamber 9 filled with gas applied with a positive pressure, by which the covering of the gas coming along with the fiber 5 is separated. COPYRIGHT: (C)1999,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a new cable and cable laying method which can perform a high-energy, long distance transmission between two places separated by a water area at a reasonable cost with a high reliability. SOLUTION: A conductor 1 is of multi-wire type made from copper, while an insulation 2 may consist of winding of a tape or an extruded shape, and a metal sheath 3 is made of lead alloy as conventional. The first layer 4 covering the metal sheath is made of a polymer such as polyethylene(PE) and may be of semiconductive for avoiding potential difference or decreasing it. A reinforcing material 5 in the crosswise direction consisting of a tape of stainless steel etc., is installed on the surface of the layer 4, and thereon a second layer 6 is installed which consists of a hard copper wire equipped with profile. Thereon the following are installed; an insulating material sheath 7 as PE sheath, a layer 8 consisting of galvanized steel wires, and an outside protection material 9 made from polypropylene lines and asphalt. COPYRIGHT: (C)1999,JPO
Abstract:
PROBLEM TO BE SOLVED: To optimize a network operation and to improve the inter-entity cooperation in an inter-cell communication transfer mode by making a server entity notify a target entity of a parameter that is effective for deciding the condition in which the target cell is regarded as a rejected cell. SOLUTION: The information on a parameter that is effective for deciding the condition where a target cell is regarded as a rejected cell is sent to a target entity BSCc from a server entity BSCs via an MSC entity, which secures a contact between server and target entities. The information to which a code INF is added is connected to a message HO REQ that is sent to MSC entity by the BSC s serving as a server BSC and then sent again to the entity BSC c , serving as a target BSC by the MSC entity. Then a code INF' is added to the information which is connected to the corresponding message HO REQ'. COPYRIGHT: (C)1999,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a sealed mono-block storage battery having a compact cooling device and the wall thickness of a case with high cooling efficiency. SOLUTION: This storage battery has a plastic container constituted with a cover 3 and a case 2 partitioned in several chambers 4 with at least one partition 5. A cooling device co-operating with each outer surface of faced walls 6 of the case 2 perpendicular to the partition 5, and having two plastic side plates 7 is installed. The cooling device is operated at pressure equal to at least one relative bar. Each side plate 7 defines a section having a plurality of ribs for forming baffles for letting fluid flow, an inlet orifice for fluid, and an outlet orifice, together with the corresponding wall 6. The wall thickness of the case 2 is made 2.5 mm or less advantageous from the standpoint of cooling efficiency. Each direction of ribs 8 is set so as to have an angle of 60-90° to the plane of the partition 5. COPYRIGHT: (C)1999,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a paste electrode which has no irreversible loss of storage capacity. SOLUTION: This paste nickel electrode includes a can bon-based conductor, a current collector, and a nickel hydroxide based active material in powder form, and the conductor withstands electrochemical oxidation and is made from carbon particles corresponding to the formulae: W>0.025 (unit 10 9 g/m) and W=TC002/S×G. In the formulae. TC002 is a microcrystal size (unit nm) in (002) direction in an X-ray diffraction chart, S is the surface area of the particles (unit m 2 /g), and G is the graphitization coefficient of the carbon defined by the formula: G=(d002-0.3354)/(0.3450-0.3354) (d002 is a lattice constant (unit nm) in the 002 direction). COPYRIGHT: (C)1999,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a curvature of the substrate which supports the planar optical waveguide. SOLUTION: This planar optical waveguide has a structure of a glass layer for guiding light and a silicon wafer (SUB) supporting the structure, and the silicon wafer is covered with an intermediate layer (ZS) which has a coefficient of thermal expansion larger than the coefficient of thermal expansion of the silicon wafer and the coefficient of thermal expansion of a buffer layer (PS) deposited on the intermediate layer. A material which is specially suitable for this intermediate layer is aluminum oxide (Al2 O3 ) with a high fusion point.
Abstract translation:要解决的问题:提供支撑平面光波导的基板的曲率。 解决方案:该平面光波导具有用于引导光的玻璃层和支撑该结构的硅晶片(SUB)的结构,并且硅晶片被覆盖有中间层(ZS),中间层(ZS)的热膨胀系数大于 硅晶片的热膨胀系数和沉积在中间层上的缓冲层(PS)的热膨胀系数。 特别适用于该中间层的材料是具有高熔点的氧化铝(Al 2 O 3)。