Abstract: An injection locked transmitter for an optical communication network includes a master seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one slave laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the master seed laser source. The laser injected modulator is configured to receive the master seed laser source input and the input data stream, and output a laser modulated data stream.

Abstract: A method for generating optical communication signals in a communication network includes (1) generating at least a first optical tone and a second optical tone using a quantum dot (QD) coherent comb laser (CCL), the first and second optical tones having different respective wavelengths, (2) modulating the first optical tone according to a first modulation signal to generate a first communication signal, and (3) modulating the second optical tone according to a second modulation signal to generate a second communication signal.

Abstract: An echo cancellation method includes steps of (a) extracting phase-distortion estimates, (b) reconstructing an echo signal, (c) generating a clean signal, and (d) producing a primary signal. Step (a) includes extracting, from a first phase signal, a plurality of phase-distortion estimates, the first phase signal having been estimated from an echo-corrupted signal received at a first coherent transceiver of a coherent optical network. Step (b) includes reconstructing an echo signal from the plurality of phase-distortion estimates and a transmitted signal transmitted by the first coherent transceiver. Step (c) includes generating a clean signal as a difference between the reconstructed echo signal and the first phase signal. Step (d) includes producing a primary signal by mapping each of a plurality of clean-phase estimates of the clean signal to one of a plurality of constellation symbols associated with a modulation scheme of the primary signal.

Abstract: A method for estimating a chromatic dispersion of an optical-fiber channel is disclosed includes receiving, via the optical-fiber channel, a chromatically-dispersed signal having a symbol rate 1/T. The method also includes, for each chromatic-dispersion value of a plurality of chromatic-dispersion values, determining a respective clock-tone magnitude by: (i) applying, to the chromatically-dispersed signal or a signal derived therefrom, a chromatic dispersion equal to the chromatic-dispersion value to generate a dispersion-compensated signal, and (ii) extracting the clock-tone magnitude from at least one of a positive-frequency clock-tone and a negative-frequency clock-tone of the dispersion-compensated signal, the positive-frequency clock-tone and the negative-frequency clock-tone being spectral components of the dispersion-compensated signal at temporal frequencies 1/T or ?1/T respectively. The method also includes determining a maximum of the extracted clock-tone magnitudes.

Abstract: Provided are a phase difference measurement method and system for an antenna array, and a phase compensation method and system for an antenna array. The antenna array includes at least two array elements. The phase difference measurement method includes: measurement is performed to obtain a three-dimensional space far-field phase data set of each array element in an antenna array; a three-dimensional solid angle space is determined, and three-dimensional space far-field phase data of each array element is acquired from the three-dimensional space far-field phase data set, wherein the three-dimensional space far-field phase data of each array element corresponds to the three-dimensional solid angle space, of each array element in the antenna array; and with a three-dimensional space far-field phase data of a first array element in the antenna array as a reference, a phase difference between other array element and the first array element is obtained.

Abstract: An experimental system for out-of-plane seismic performance of a masonry block wall, comprising: a static test bed (1), a lateral limiting system disposed on one side on the static test bed (1), and a transverse load system disposed on the other side on the static test bed (1), a masonry block wall to be tested (401) being disposed between the lateral limiting system and the transverse load system. The experimental system also comprises a vertical load system disposed above a wall.

Abstract: An experimental system for out-of-plane seismic performance of a masonry block wall, comprising: a static test bed (1), a lateral limiting system disposed on one side on the static test bed (1), and a transverse load system disposed on the other side on the static test bed (1), a masonry block wall to be tested (401) being disposed between the lateral limiting system and the transverse load system. The experimental system also comprises a vertical load system disposed above a wall.

Abstract: A method for early diagnosis of keratoconus based on multi-modal data considers a mutual relationship between both eyes using four refractive maps for corneas of the both eyes and absolute corneal elevation data, and combines the deep convolutional network method, the traditional support vector machine (SVM) method in machine learning, and the elevation map enhancement method with adjustable best-fit-sphere (BFS) to identify sensitivity and specificity of a focus and balance the sensitivity and specificity. With multi-dimensional comprehensive judgment of a keratoconus morbidity with a patient as a unit, combined with binocular data including both manual selection features and deep network learning from big data, the diagnosis method has higher robustness and accuracy.

Abstract: A method for early diagnosis of keratoconus based on multi-modal data considers a mutual relationship between both eyes using four refractive maps for corneas of the both eyes and absolute corneal elevation data, and combines the deep convolutional network method, the traditional support vector machine (SVM) method in machine learning, and the elevation map enhancement method with adjustable best-fit-sphere (BFS) to identify sensitivity and specificity of a focus and balance the sensitivity and specificity. With multi-dimensional comprehensive judgment of a keratoconus morbidity with a patient as a unit, combined with binocular data including both manual selection features and deep network learning from big data, the diagnosis method has higher robustness and accuracy.

Abstract: A floor coating composition that has a long pot life and dries fast, and a coating made therefrom having good slip resistance and high adhesion strength to the floor.

Abstract: The present invention relates to an aqueous polymer dispersion composition comprising a stable aqueous dispersion of single-phase thermoplastic polymer particles imbibed with a thermosettable compound having at least two oxirane groups. The thermoplastic polymer particles have a sufficient concentration of anti-agglomerating functional groups to stabilize the latex against agglomeration, and the thermoplastic polymer particles being a copolymerization product of a monomer mixture comprising, based on the total dry weight of the monomer mixture (a) 35 wt. % to 71 wt. % of ethyl acrylate, (b) 30 wt. % to 60 wt. % of methyl methacrylate, and (c) 5 wt. % to 10 wt. % methylol acrylamide.

Abstract: A floor coating composition that has a long pot life and dries fast, and a coating made therefrom having good slip resistance and high adhesion strength to the floor.

Abstract: The present invention provides a method of making 1,1,1,2,3-pentachloropropane comprising: (1) utilizing 1,1,1,3-tetrachloropropane as a raw material and 1,1,1,2,3-pentachloropropane as a solvent to carry out a dehydrochlorination reaction to obtain 1,1,3-trichloropropene, and after the reaction, (2) introducing chlorine gas into the reaction system to carry out a chlorination reaction to obtain 1,1,1,2,3-pentachloropropane. In the present invention, 1,1,1,2,3-pentachloropropane acts as a solvent or a diluent, and may act as an inhibitor to prevent the production of high-boiling residues such as dimers, oligomers or polymers during the dehydrochlorination process. Then, the conversion rate of 1,1,1,3-tetrachloropropane is increased, and consequently, the yield of final product 1,1,1,2,3-pentachloropropane is also increased.

Abstract: The present invention relates to an aqueous polymer dispersion composition comprising a stable aqueous dispersion of single-phase thermoplastic polymer particles imbibed with a thermosettable compound having at least two oxirane groups. The thermoplastic polymer particles have a sufficient concentration of anti-agglomerating functional groups to stabilize the latex against agglomeration, and the thermoplastic polymer particles being a copolymerization product of a monomer mixture comprising, based on the total dry weight of the monomer mixture (a) 35 wt. % to 71 wt. % of ethyl acrylate, (b) 30 wt. % to 60 wt. % of methyl methacrylate, and (c) 5 wt. % to 10 wt. % methylol acrylamide.

Abstract: This invention relates to a cardanol modified epoxy resin composition, especially, relates to a cardanol and/or dihydric phenol modified epoxy resin composition, a process making thereof and its application in a low VOC high solids coating, and a low VOC waterborne coating.