Abstract: Disclosed by the present invention is a sub-band selection activation-based multi-band hyperbolic frequency modulation spread spectrum underwater acoustic communication method. The present invention discloses: dividing the available bandwidth of an underwater acoustic system into a plurality of sub-bands, performing hyperbolic frequency modulation on each of the sub-bands respectively, and performing spread spectrum modulation on the plurality of sub-bands within the same frequency modulation period, thus implementing multi-band parallel transmission. Hence, within each frequency modulation period, the divided plurality of sub-bands is grouped, and each sub-band group activates different sub-bands for transmission according to different options for transmitting data. Compared to other underwater acoustic hyperbolic frequency modulation communication solutions, the present invention further improves the frequency band utilization of the system, and the energy efficiency is also improved.

Abstract: An internal valve including a valve body, a poppet valve coupled to the valve body, a bleed valve, a stem slidably disposed in the valve body and operatively coupled to the bleed valve. The stem is shiftable from a first position wherein the poppet valve and the bleed valve are both closed, to a second position wherein the bleed valve is open, and a third position wherein the bleed valve is closed, the poppet valve is open, and the poppet valve may shift toward the closed position and the bleed valve may open in response to a pressure change. A spring seat is coupled to the stem via a retaining feature such that the spring seat is movably disposed in the valve body, and a spring is operatively coupled to the stem via the spring seat and configured to bias the stem toward the first position.

Abstract: A seed or seedling is coated with underivatized guar, cationic hydroxypropyl guar, polyacrylamide, poly(methacrylic acid), poly(acrylic acid), polyacrylate, polyethylene glycol), polyethyleneoxide, poly(vinyl alcohol), polyglycerol, polytetrahydrofuran, polyamide, hydroxypropyl guar, carboxymethyl guar, carboxymethylhydroxypropyl guar, underivatized starch, cationic starch, corn starch, wheat starch, rice starch, potato starch, tapioca, waxy maize, sorghum, waxy sorghum, sago, dextrin, chitin, chitosan, xanthan gum, carageenan gum, gum karaya, gum arabic, pectin, cellulose, hydroxycellulose, hydroxyalkyl cellulose, hydroxyethyl cellulose, carboxymethylhydroxyethyl cellulose, or hydroxypropyl cellulose, the coated seed or seedling having a shelf-life at room temperature in ambient conditions in an unsealed container to at least two months.

Abstract: The invention provides a method for automatically identifying a modulation mode for a digital communication signal. The method comprises the following steps of: S1: preprocessing a training digital modulation signal; S2: extracting a characteristic value of the training digital modulation signal; S3: constructing a strong classifier by Bagging learning; and S4: preprocessing a modulation signal to be tested and extracting a corresponding characteristic parameter, and then inputting the characteristic parameter into the strong classifier in the S3 to classify and identify the modulation signal. According to the method, by processing all characteristic values in parallel, a success rate of identification has little to do with an identification performance of a single characteristic parameter and is mainly related to an overall performance, so that the identification to the modulation mode has the advantages of fast identification speed and high success rate of identification.

Abstract: A method for manufacturing a housing of an electronic device includes providing a substrate, forming a metal plating on a surface of the substrate, and laser-etching the metal plating to form a conductive layer. The conductive layer serves as an antenna radiator or a conductive circuit.

Abstract: Provided are a method and device for dynamically monitoring suspended matter based on an annular interleaving array. An annular multi-band interleaving array used thereby can be combined with the Doppler effect to on-line measure the concentration and linearity distribution of the suspended matter and a three-dimensional flow velocity of suspended water, thus realizing real-time monitoring of water quality. A frequency range needing to be measured is divided into different frequency bands, and different transceiving transducer arrays are used to transmit and receive measurement signals, so that the concentration and linearity distribution of various suspended matter with an extremely large linearity range can be obtained through one measurement.

Abstract: A surface treatment applied to a glass which reduces breakability of the glass includes a substrate and a toughened layer formed thereon. The toughened layer of the disclosure is formed on at least one surface of the substrate. The toughened layer is an optical-grade nano resin film which has no significant effect on the transparency or color of the substrate. The disclosure further provides a method for applying the toughened layer on the glass.

Abstract: Disclosed are an adaptive RLS decision feedback equalizing system, characterized by comprising: an error code cross-correlation module, an equalization module, a decision feedback unit, a coefficient updating unit and an autocorrelation estimation module. Also disclosed are an implementation method of the adaptive RLS decision feedback equalizing system, comprising the following steps: 1) setting an initial value of c0 for a filtering coefficient; 2) generating a filtering output signal yk; 3) computing an error code cross-correlation result Ik; 4) updating the filtering coefficient ck?1 to ck; 5) updating an autocorrelation inverse matrix estimation result Pk?1 to Pk according to a forget constant factor w and an equalizer input signal sequence rk; 6) repeating step 2) to step 5), until the equalizer coefficient converges.

Abstract: Disclosed is an underwater source node positioning method, which includes the specific steps: (1) placing distributed underwater receiving nodes, the source node transmitting a pulse signal, and the receiving nodes receiving the pulse signal sent by the source node; (2) processing the signal of each receiving node; (3) according to a multipath signal received by each receiving node, performing parameter estimation of the position of the source node, specifically: (3-1) calculating a path length of each path; (3-2) calculating a delay difference between each path and a direct path; (3-3) calculating the signal received by each receiving node; (3-4) performing mesh search matching to obtain the position of the source node. Compared with the conventional method, the present invention requires fewer receiving nodes and does not require accurate clock synchronization of signals. The present invention utilizes multipath signals propagated by signals to enable more accurate positioning of the source nodes.

Abstract: A seed or seedling is coated with underivatized guar, cationic hydroxypropyl guar, polyacrylamide, poly(methacrylic acid), poly(acrylic acid), polyacrylate, polyethylene glycol), polyethyleneoxide, poly(vinyl alcohol), polyglycerol, polytetrahydrofuran, polyamide, hydroxypropyl guar, carboxymethyl guar, carboxymethylhydroxypropyl guar, underivatized starch, cationic starch, corn starch, wheat starch, rice starch, potato starch, tapioca, waxy maize, sorghum, waxy sorghum, sago, dextrin, chitin, chitosan, xanthan gum, carageenan gum, gum karaya, gum arabic, pectin, cellulose, hydroxycellulose, hydroxyalkyl cellulose, hydroxyethyl cellulose, carboxymethylhydroxyethyl cellulose, or hydroxypropyl cellulose, the coated seed or seedling having a shelf-life at room temperature in ambient conditions in an unsealed container to at least two months.

Abstract: The present invention provides a method for increasing the growth of a plant by contacting a seed of the plant with a composition comprising a cationic guar having an average molecular weight of between 2,000 Daltons and 90,000 Daltons. The present invention also provides a seed treated with a cationic guar having an average molecular weight of between 2,000 Daltons and 90,000 Daltons.

Abstract: A sandwich structure for enhancement of photoluminescence (PL) from luminescent films and the corresponding preparation method are disclosed. The sandwich structure comprises a support, a luminescent film grown on the support, and a single-layer close-packed microsphere array deposited onto the luminescent film. The microspheres have high transmittance excitation light and emitted light, respectively. The low price of dielectric microspheres is beneficial to industrial applications. The stable chemical properties of dielectric microspheres make PL enhanced in a long term. Both metal and non-metal materials can be used as the support in the sandwich structure. These features significantly improve the technique of PL enhancement for luminescent films.

Abstract: Disclosed are an adaptive RLS decision feedback equalizing system, characterized by comprising: an error code cross-correlation module, an equalization module, a decision feedback unit, a coefficient updating unit and an autocorrelation estimation module. Also disclosed are an implementation method of the adaptive RLS decision feedback equalizing system, comprising the following steps: 1) setting an initial value of c0 for a filtering coefficient; 2) generating a filtering output signal yk; 3) computing an error code cross-correlation result Ik; 4) updating the filtering coefficient ck?1 to ck; 5) updating an autocorrelation inverse matrix estimation result Pk?1 to Pk according to a forget constant factor w and an equalizer input signal sequence rk; 6) repeating step 2) to step 5), until the equalizer coefficient converges.

Abstract: A sandwich structure for enhancement of photoluminescence (PL) from luminescent films and the corresponding preparation method are disclosed. The sandwich structure comprises a support, a luminescent film grown on the support, and a close-packed dielectric microsphere monolayer deposited onto the luminescent film. The microspheres have high transmittance excitation light and emitted light, respectively. The low price of dielectric microspheres is beneficial to industrial applications. The stable chemical properties of dielectric microspheres make PL enhanced in a long term. Both metal and non-metal materials can be used as the support in the sandwich structure. These features significantly improve the technique of PL enhancement for luminescent films.

Abstract: The configurations of a buck type and a buck/boost type converter systems and a controlling method thereof are provided in the present invention. The proposed buck/boost type converter system includes a rectifier bridge, a first auxiliary circuit including a first unidirectional switch coupled to the rectifier bridge and a second unidirectional switch coupled to the first unidirectional switch, a first capacitor coupled to the first unidirectional switch and the rectifier bridge, a buck/boost converter having a first input terminal coupled to the first unidirectional switch, a second input terminal coupled to the first capacitor, a first output terminal coupled to the second unidirectional switch and a second output terminal, a second capacitor electrically connected to the first and the second output terminals in parallel, and a DC source coupled to the second unidirectional switch.

Abstract: The configurations of a buck type and a buck/boost type converter systems and a controlling method thereof are provided in the present invention. The proposed buck/boost type converter system includes a rectifier bridge, a first auxiliary circuit including a first unidirectional switch coupled to the rectifier bridge and a second unidirectional switch coupled to the first unidirectional switch, a first capacitor coupled to the first unidirectional switch and the rectifier bridge, a buck/boost converter having a first input terminal coupled to the first unidirectional switch, a second input terminal coupled to the first capacitor, a first output terminal coupled to the second unidirectional switch and a second output terminal, a second capacitor electrically connected to the first and the second output terminals in parallel, and a DC source coupled to the second unidirectional switch.

Abstract: The invention provides methods and compositions for determining whether an individual is at risk of developing, or has, one or more angiogenic disorders. The methods detect the presence and/or amount of one or more genes or gene products in a sample, including a RORA, CRIM1, CXCR4, C5orf26, IGHG3, NALP2, PLA2G4A, IGLJ3, SHQ1, UCHL1, TANC1, PKP2, DNAJC6, C6orf105, NALP1, RGS13, CXCL13, RPS6KA2, MMP7, IL1A, ABCA1, VCAN, KIAA0888, ENPP2, and FAM38B gene or gene product. In addition, the invention provides methods for using one or more of these genes or gene products as a target for preventing or delaying the onset of one or more angiogenic disorders or treating a patient with one or more such disorders. The angiogenic disorder can be, for example, an ocular angiogenic disorder, for example, a disorder associated with choroidal neovascularization, for example, age-related macular degeneration.