58results about How to "Spectrum rich" patented technology

According to various embodiments, an audio system having high quality sound and a high frequency response is provided. The audio system comprises one or more speakers with mismatched components. Although the combination of mismatched components may result in a diminished frequency response, digital signal processing may compensate for the physical deficiencies of a driver of the speaker. In some embodiments, an audio system comprises a speaker and a signal processor. The speaker may comprise one or more mismatched speaker components which are operably coupled to each other such that the components, together, have a low frequency response. The signal processor may operably couple to the one or more mismatched speaker components. The signal processor may be configured to process an input signal and to drive the speaker using the processed signal such that the speaker has a higher frequency response than the low frequency response.

The present invention relates to a satellite image based coastline automatic extraction and classification method. The method is characterized technically by comprising the following steps: step 1, using a multi-spectral image of a coastal zone after precise registration, and by combining a normalized difference water index (NDWI) and a level set model, obtaining a precise contour of a water boundary line; step 2, performing object-oriented segmentation on a land portion region, and extracting coastline coastal feature basic units by means of a spatial position topological relationship between the basic units; step 3, based on a decision tree, performing determination and classification on each coastline coastal feature basic unit; step 4, determining a coastline position according to a coastline interpretation rule; and step 5, on the basis of a result of the coastline position based on the multi-spectral image in the step 4 and property information, outputting a coastline vector based on a high-resolution panchromatic image. According to the method provided by the present invention, the coastline position can be rapidly, accurately and comprehensively surveyed and the change of the coastline position can be dynamically monitored.

The present invention provides for methods and systems for digitally processing an audio signal and setting a peak signal threshold to a level that is determined to be safe, particularly for children or listeners with sensitive hearing. In various embodiments, a method comprises adjusting a gain of the signal based upon a received profile value minus a safety parameter, filtering the signal with a low shelf filter and/or high shelf filter, passing the signal through a first compressor that sets a peak threshold based upon the profile value minus the safety parameter, filtering the signal again with a low shelf filter and/or high shelf filter, processing the signal with a graphic equalizer, passing the signal through a second compressor that sets a peak threshold based upon the profile minus the safety parameter, and outputting the signal.

The present invention provides for methods and systems for digitally processing audio signals by adjusting the gain of a signal a first time, using a digital processing device located between a radio head unit and a speaker. The methods and systems may filter the adjusted signal with a first low shelf filter, compress the filtered signal with a first compressor, process the signal with a graphic equalizer, compress the processed signal with a second compressor and adjust the gain of the compressed signal a second time. The methods and systems may also filter the signal received from the first low shelf filter with a first high shelf filter prior to compressing the filtered signal with the first compressor. The signal may be filtered with a second low shelf filter prior to processing the signal with the graphic equalizer. Some embodiments filter the signal with a second high shelf filter after the signal is filtered with the second low shelf filter.

The invention discloses a four-color LED light mixing method based on visible light communication. The method comprises the steps that spectral power distribution of all monochromatic light is obtained through a spectrograph, and the tristimulus value of each corresponding monochromatic light is calculated; the target color temperature of mixed light is determined, and a corresponding reference light source is selected and used for obtaining the tristimulus value of a mixed color; according to the color addition principle, the sum of the tristimulus values of all the monochromatic light should be equal to the tristimulus value of the mixed color, and a color mixing equation set is obtained; the spectral power distribution of the mixed light can be obtained according to the light mixing coefficient of all the monochromatic light in the color mixing equation set, and the color rendering index Ra of the mixed light is calculated according to the spectral power distribution of the mixed light, wherein Ra is larger than or equal to epsilon; the range of the channel capacity C of the mixed light is calculated, and the maximum capacity Cmax is solved within the range; the ratio of all the colored light with the maximum capacity is output.

The invention discloses a sensitive, reliable, rapid and stable synchronous detection method for iron ore multi-elements, and belongs to the technical field of test and analysis of metallurgy materials. The method comprises the following steps: adding 0.1-0.2g of iron ore powder to 200-250ml/g mixed acid of hydrochloric acid and nitric acid with the ratio of (3-5):1 to dissolve; adding 7-12ml/ml hydrofluoric acid, and heating at 200-250 DEG C for 10-15 minutes; adding 4-6ml/ml perchloric acid, heating at 200-250 DEG C until the residual solution is 0.8-1.2ml; adding 10-15ml/ml diluted hydrochloric acid; and filtering after dissolving, and diluting into 0.0008-0.0012g/ml to obtain a solution to be detected. Standard solutions of the elements with different concentration gradients are prepared, an analytical spectral line and a working condition of each element in an inductively coupled plasma emission spectrum are selected, the emission intensity of the analytical spectral line of each element is determined to draw a standard curve, the emission intensity corresponding to each element is detected, and the content of each element is determined according to the standard curve. The method is sensitive, reliable, rapid and stable, analysis data can be timely provided for the smelting production process, the production efficiency and the utilization ratio of equipment are improved, and the application promotion value is relatively high.

The invention discloses a solar-energy self-control multimode efficient pest trap. The solar-energy self-control multimode efficient pest trap comprises a power supply system, a support system and a trap system and is characterized in that the trap system comprises a palace-lantern-shaped protective cover (31), a main trap lamp (321) is arranged below the palace-lantern-shaped protective cover (31), and a pest storage bag (37) is arranged below the main trap lamp (321). By the solar-energy self-control multimode efficient pest trap, the problems that a pest trap mode is single, pest trap rate is low, trapped pests cannot be recycled, energy consumption is high, operation is complex, production cost is high and the like in the prior art are solved.

The present invention provides for methods and systems for digitally processing an audio signal to reproduce high quality sounds on various materials. In various embodiments, a method comprises filtering the signal with a low shelf filter and/or high shelf filter, passing the signal through a first compressor that, filtering the signal again with a low shelf filter and/or high shelf filter, processing the signal with a graphic equalizer based on a selected material profile, passing the signal through a second compressor, and outputting the signal to a transducer.

Provided is a low-residual-voltage ultra wide band coaxial lightning arrester. The problem that an existing coaxial lightning arrester is few in discharging channel, poor in through-current capability, high in residual voltage caused by insufficient discharging, narrow in transmission band and small in application, easily damages a protected device and causes communication signal distortion is mainly solved. The low-residual-voltage ultra wide band coaxial lightning arrester is characterized in that each main coaxial core (5) comprises an interface portion (53) penetrating insulation supports (51) and an equant core body portion (52) arranged between the insulation supports (51), and a plurality of cavities different in diameter are coaxially arranged inside a main coaxial housing (3). The main coaxial cores of the low-residual-voltage ultra wide band coaxial lightning arrester are even, and impedance matching is achieved by adopting a method of changing the diameters of the cavities of the main coaxial housing. The low-residual-voltage ultra wide band coaxial lightning arrester is wide in band width, large in through-current channel number, high in through-current capacity, rich in high-frequency digital signal frequency spectrum, high in signal fidelity, wide in application range, complete in discharging, low in residual voltage and high in protectiveness on an instrument device behind the lightning arrester.

The invention discloses a server-based plant growth illumination device for inhibiting metamorphosis development of pests and a control method thereof. The server-based plant growth illumination device for inhibiting metamorphosis development of pests comprises a control part, a light-emitting part and a server, and the light-emitting part comprises a first light source part and a second light source part; the first light source part emits red light and blue light, and the second light source part emits blue light; and the control part is connected with the server and is used for receiving aninstruction of the server and controlling the first light source part and the second light source part respectively. According to the invention, irradiation of red light and blue light can be adjustedthrough combination and control of the first light source part, the second light source part and a third light source part, so that personnel working in a plant lighting environment are protected; meanwhile, components such as green light in the first light source part and the second light source part can be supplemented by utilizing white light, so that the spectrum is further enriched, and an environment more beneficial to plant growth is created.

Anthocyanic colorant made of vegetable primary material and process for its production relate to food, cosmetic, pharmaceutical and textile industry and may be used in production of alcoholic and soft drinks, confectionery, products made of sour milk, in coloring of tablet capsules, dying of children's underwear, toys, etc. According to the invention, pelargonidin glycoside was added to the composition of the natural colorant that contained cyanidin glycosides, peonidin glycosides, organic substance and mineral salts. The components percentage shall be as follows, %: cyanidin glycoside 0.1-8.6; peonidin glycoside 0.08-6.45 pelargonidin glycoside 0.005-4.3; organic substance and mineral salts-the rest. Due to the fact that the colorant solution contains pelergonidin glycoside further to cyanidin and peonidin glycosides, the proposed colorant obtained expanded color spectrum. Combination of these three anthocyans in the proposed colorant provides for the most rich spectrum of red colors. At the same time, the ratio of pelargonidin glycoside:peonidine glycoside:cyanidin glycoside must be 1:1.5:2, respectively, and it will provide for production of a colorant with a number of valuable physical properties. Namely, the colorant retains red color when pH of the environment is not more than 7, it is thermostable, photostable and maintains its properties during 2 (two) years, besides, its relative optical density is the highest when it is subjected to the light with wavelength of 505-515 nm. According to the invention, process of the colorant production implies that pre-dried vegetable maize-pulp containing anthocyan is grinded, extracted by a mix of aqueous solutions of hydrochloric and citric acids in the field of ultrasonic vibration. Then the extracted coloring matter is filtered and concentrated in vacuum. The primary material is additionally prepared for extraction by infusion of grinded material in extracting agent during 6-8 hours at the temperature of 35-40° C. Extraction may be performed in three steps. Processing for extraction of each lot shall be 30-40 minutes at the temperature of 35-40° C. The process makes the production technology easier and provides for additional source of primary materials. 2 independent claims, 8 dependent claims, 5 tables.

The semi-coat powder method for fluorescent tube comprises: first, cleaning and baking the glass tube; second, coating alumina powder protection membrane on tube inner wall; third, coating fluorescent powder partly on tube inner wall to reserve a translucent zone toward object side with arc surface width as one sixth to fourth of tube cross-section perimeter and isolated to fluorescent powder; fourth, baking the tube and clearing powder. This invention reduces efficiently the effect that light ray is absorbed by fluorescent powder, increases luminous efficiency, saves energy more than 20%, and enriches spectrum of light ray.

Thisa invention relates to a method for integrating modulator in a feedback laser module characterizing in applying a secondary cooling technology and a photoelectric separation technology to increase the short and long term stability of output optical power, then applyihng a refrigerator to control the temperature and monitor its temperature with a thermistor to adjust and stabilize laser diode source in the applification of WDM, finally introducing passive optical applicances and laser module with the wavelength monitor and control ability to integrate and package a micro-optical demodulator module in a 14-feet butterfly high power feed back laser.

The invention discloses a plant growth illumination device with an optical signal based on biological recognition and a control method thereof. The plant growth illumination device with the optical signal based on biological recognition comprises a control part and a light-emitting part, wherein the light-emitting part comprises a first light source part and a second light source part; the first light source part emits red light and blue light, and the second light source part emits far-red light; the control part comprises a controller, a photosensitive sensor, a temperature sensor, an infrared biological recognition device, an ultrasonic biological recognition device, a voice biological recognition device, an iris biological recognition device and/or a face biological recognition device;and the controller controls the first light source part and the second light source part according to data detected by the photosensitive sensor, the temperature sensor, the infrared biological recognition device, the ultrasonic biological recognition device, the voice biological recognition device, the iris biological recognition device and/or the face biological recognition device.

The invention discloses a plant growth illumination device for preventing and killing pests based on biological recognition and a control method of the plant growth illumination device. The device comprises a control part and a light emitting part, the light emitting part comprises a first light source part and a second light source part, the first light source part emits red light and blue light,and the second light source part emits yellow light; and the control part comprises a controller, a photosensitive sensor, a temperature sensor, an infrared biological recognition device, an ultrasonic biological recognition device, a voice biological recognition device, an iris biological recognition device and/or a face biological recognition device, and the controller controls the first lightsource part and the second light source part according to data detected by the photosensitive sensor, the temperature sensor, the infrared biological recognition device, the ultrasonic biological recognition device, the voice biological recognition device, the iris biological recognition device and/or the face biological recognition device.

The invention discloses a server-based plant growth illumination device for preventing and controlling plant diseases and insect pests and a control method thereof. The server-based plant growth illumination device for preventing and controlling the plant diseases and insect pests comprises a control part, a light emitting part and a server, and the light emitting part comprises a first light source part and a second light source part; the first light source part emits red light and blue light, and the second light source part emits ultraviolet light; and the control part is connected with theserver and is used for receiving an instruction of the server and controlling the first light source part and the second light source part respectively. According to the device, irradiation of the red light and the ultraviolet light can be adjusted through combination and control of the first light source part, the second light source part and a third light source part, so that personnel workingin a plant lighting environment are protected; and meanwhile, components such as green light in the first light source part and the second light source part can be supplemented by utilizing white light, so that a spectrum is further enriched, and an environment more beneficial to plant growth is created.

The invention discloses a server-based plant growth illumination device for preventing and killing pests and a control method thereof. The server-based plant growth illumination device for preventingand killing the pests comprises a control part, a light-emitting part and a server, the light-emitting part comprises a first light source part and a second light source part, the first light source part emits red light and blue light, and the second light source part emits yellow light; and the control part is connected with the server and is used for receiving an instruction of the server and controlling the first light source part and the second light source part respectively. Illumination of the red light and the yellow light can be adjusted through combination and control of the first light source part, the second light source part and a third light source part, and therefore people working in the plant illumination environment are protected; and meanwhile, components such as green light in the first light source part and the second light source part can be supplemented by utilizing white light, so that a spectrum is further enriched, and an environment more beneficial to plant growth is created.