Abstract:
A method for detecting a locked condition of a demodulator of at least one signal that may have discrete levels defining a constellation of nominal points in a plane. The method includes the steps of defining reference areas about the nominal points, a reference area being separated from another by a band or an angular sector crossing the origin of the constellation plane, and indicating a locked condition if the ratio of points occurring in the reference areas is above the probability for points to occur in the reference area, when the demodulator is wrongly adjusted.
Abstract:
In a Reed-Solomon error correction system, the coefficients of the syndrome polynomial of degree 2t-1 are stored in a first set of registers R, coefficients 0,0 . . . ,0,1,0 are stored in a second set of registers .lambda., and a first number is stored in a counter. Coefficients 1,0 . . . ,0 are stored in a third set of registers Q, zeroes are stored in a fourth set of registers .mu., and a number exceeding the first number by 1 is stored in an indicator register. a) If the content of the counter is higher than or equal to the content of the indicator register, or if the content of the last register of the first set of registers R is zero, value Q.sub.2t-1 R.sub.i-1 +R.sub.2t-1 Q.sub.i-1 is stored in each register R.sub.i of the first set of registers R, and value Q.sub.2t-1 .lambda..sub.i-1 +R.sub.2t-1 .lambda..sub.i-1 is stored in each register .lambda..sub.i of the third set of registers .lambda.. b) Otherwise, the contents of the first set of registers R, the second set of registers .lambda., and the counter are further transferred into the third set of registers Q, the fourth set of registers .mu., and the indicator register, respectively. Steps a) or b) are repeated until the content of the counter is decremented by t.
Abstract:
A composition of matter including (i) an epoxy resin and (ii) a cross-linking agent therefor, said cross-linking agent being the reaction product of trimellitic anhydride with a diol, and wherein such reaction the molar ratio anhydride/diol is not in excess of 2, is a useful binder for coating compositions, notably the powder paints.
Abstract:
Compositions containing Bifenox and Linuron in combination with a mineral oil, such as white oil, show a remarkable synergism of the constituents and are of use as pre-harvest defoliants for crop plants, e.g. for desiccation of potato plants.
Abstract:
A saturated, cross-linking binder composition for use in powder coatings is disclosed. The composition comprises at least two saturated cross-linking resins and a cross-linking agent in which the resins exhibit different reactivities with respect to the cross-linking agent.
Abstract:
A saturated cross-linkable binder composition adapted for preparing coatings having a non-glossy surface is disclosed which comprises:(a) at least one cross-linkable resin selected from the group consisting of saturated polyester resins and epoxide resins;(b) a cross-linking agent wherein the functional groups are selected from the group consisting of acid groups and acid anhydride groups and, in case the cross-linkable resin is a saturated polyester resin, also masked isocyanate groups; and,(c) having associated therewith a salt of an at least bivalent metal ion and an organic acid anion selected from the group consisting of carboxylic anions and acetylacetonate.These binder compositions are particularly useful as binding agents in powderous paint compositions which yield a paint coating having a non-glossy and textured surface.
Abstract:
A saturated, cross-linking binder composition for use in powder coatings is disclosed. The composition comprises at least two saturated cross-linking resins and a cross-linking agent in which the resins exhibit different reactivities with respect to the cross-linking agent.
Abstract:
Curable, saturated polyester resins and cross-linking agents therefor, in association with an at least divalent metal oxide, are useful binders for the powder paints, e.g., those typically applied by electrostatic deposition or fluidized bed spraying.
Abstract:
A method of preparing varnishes based on polyester resin, which do not turn green on polymerization. It comprises forming a reducing agent during polycondensation, by reacting a magnesium compound with the reagents present. Applicable chiefly to the furniture industry.