摘要:
A laser measuring method in a laser measuring system, which comprises a rotary laser system for projecting a laser beam by rotary irradiation and at least one photodetection system having at least one photodetector for receiving the laser beam, comprising a step of emitting at least two fan-shaped laser beams by the rotary laser system, at least one of the fan-shaped laser beams being tilted, a step of receiving the laser beams at least at three known points by the photodetection system, a step of obtaining elevation angles with respect to the rotary laser system based on photodetection signals which are formed when the photodetector receives the laser beam, and a step of measuring an installing position of the rotary laser system based on elevation angles and position data at the three known points.
摘要:
A device comprises an electric field applying assembly adapted to generate an electric field having a discrete electric field profile; a conducting volume and an electrical interface region provided between the conducting volume and the electric field applying assembly such that the discrete electric field is applied to the material by the electric field applying assembly at a location spaced from the conducting volume, wherein the electrical interface region comprises at least an ionically conductive material arranged adjacent to an in contact with the conducting volume; such that the discrete electric field applied by the electric field applying assembly is smoothed by the electrical interface region so that the electric field profile established within the conducting volume is substantially continuous.
摘要:
The present invention relates to RFID devices, including handheld RFID devices, and applications for such devices. The devices and applications may be used in connection with items that are associated with an RFID tag, and optionally a magnetic security element. The devices and applications are described with particular reference to library materials such as books, periodicals, and magnetic and optical media.
摘要:
Liquid crystalline polymers containing specified ratios of repeat units derived from hydroquinone, 2,6-naphthalenedicarboxylic acid, 4-hydroxybenzoic acid and optionally terephthalic acid have exceptionally high heat distortion temperatures, making especially useful for service at high temperatures. Compositions containing reinforcing agents, especially fibrous or platy reinforcing agents are particularly useful. These polymers and compositions are useful for electrical and electronic connectors, and as films for the electronics industry, and for other uses.
摘要:
The melt viscosity of polyesters can be reduced by heating the polyester in a melt which is in contact with a hydrate that loses water at the temperature of the process. The process is typically carried out in a polymer melt mixer such as an extruder, and usually a reproducible decrease in the polymer melt viscosity is obtained. The resulting polyesters are useful for making films and moldings.
摘要:
A cylinder block has a number of cylinder bores and a water jacket at least partially surrounding the bores. When casting a cylinder block the water jacket is formed by a slender wall of a sand core. To enable the wall to be removed from the core box the wall must taper over its entire height. Prior art water jackets therefore taper from a minimum sand core wall width at the base to a large width at the top. The cylinder block of the invention has a water jacket which, when viewed in transverse section, is wider in an intermediate portion than at either its top or base. In providing a water jacket which is narrower at the top, there is more room for the addition of machined features on the top deck. Furthermore, a water jacket which is narrower at the base can have a greater depth than conventional water jackets.
摘要:
A system for selecting an optimal transformation T(G2;G1) between a first ellipsoid E1 (e.g., WGS 84) in a first global coordinate system G1, relative to which the survey measurements are made, and a second ellipsoid E2 in a second global coordinate system G2. A set of location coordinates (x'.sub.m,2, y'.sub.m,2,z'.sub.m,2) for M previously-surveyed locations, numbered m=1, . . . , M, and a set of location coordinates (x'.sub.n,1, y'.sub.n,1,z'.sub.n,1) for N presently-surveyed locations, numbered n=1, . . . , N (M.ltoreq.N) are provided, where the first M presently-surveyed locations coincide with the M previously-surveyed locations. The transformation is chosen so that the images of the location coordinates (x'.sub.n,1,y'.sub.n,1, z'.sub.n,1) for n=1, . . . , M under T(G2;G1) are as close as possible to the corresponding location coordinates (x'.sub.m,2,y'.sub.m,2, z'.sub.m,2) for m=1, . . . , M. Given an ellipsoid and a selected survey plane .tau.0 that is tangent to the ellipsoid at a selected location, a set of selected locations can be surveyed with reference to the ellipsoid, and the location coordinates of each such surveyed location can be mapped into a corresponding "survey location," defined by reference to a local coordinate system that uses the survey plane .tau.0 as its base. These transformations and projections are determined and optimized in real time, while a surveyor is measuring the presently-surveyed locations in the field. The instruments used for surveying may be part of a location determination system, such as a Global Positioning System, a Global Orbiting Navigational Satellite System or Loran.
摘要:
A stable trans fat free emulsifier composition is provided that may have other functional ingredients incorporated to form a base for a flour-based dough preparation to hold the ingredients together. A glyceride emulsifier is heated above its melting point and blended with a non-hydrogenated vegetable oil, or a quantity of glyceride emulsifier is blended with non-hydrogenated vegetable oil and the mixture then heated to a temperature above its melting point. The ratio of emulsifier to vegetable oil is selected to cause the composition, upon cooling, to form a solid plastic mass. The hardness value of the plastic mass is within a range especially applicable to bakery dough applications.
摘要:
A method measures a property of a solution spectroscopically by placing a quantity of the solution into a cuvette and passing a light therethrough. A reservoir receives a quantity of the solution and bubbles are driven off prior to putting a sample therefrom into the cuvette for measuring.
摘要:
A process for the production of polymers in which an oligomeric precursor is formed first in a melt phase. A phase transition is then induced in the polymerizing reaction medium under the action of shear in such a way that the simultaneous action of the shear, and the ongoing polymerization through the phase transition produces a product that is in a powdered form.