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31results about How to "Overcome randomness" patented technology

Digital signal transmitter synchronization system

Methods, and apparatus for carrying out the methods, are disclosed for synchronizing a plurality of RF transmitters that are supplied with a common digital information signal for carrier modulation and subsequent transmission on a common channel throughout a prescribed region, whereby the digital signal receivers within the region may receive transmissions on the channel from more than one transmitter. The method involves inserting reference signals into the data sent to the transmitters in order to place them into known states at specific times relative to the digital signals sent to them for transmission. As a result of this method, the digital signals transmitted by each of the transmitters will be identical to one another so that the receivers will be able to identify one received signal as the main signal and the others as echoes. If necessary, the signal transmitted by at least one of the synchronized transmitters may be delayed, such that identical digital signals received from at least two of the transmitters by receivers in the region will arrive at each receiver within a prescribed time window. The methods and apparatus also can be applied to one or a plurality of RF transmitters for purposes of synchronizing processes at the source of the signals and at the transmitters.
Owner:WEISS S MERRILL

Digital signal transmitter synchronization system

Methods, and apparatus for carrying out the methods, are disclosed for synchronizing a plurality of RF transmitters that are supplied with a common digital information signal for carrier modulation and subsequent transmission on a common channel throughout a prescribed region, whereby the digital signal receivers within the region may receive transmissions on the channel from more than one transmitter. The method involves inserting reference signals into the data sent to the transmitters in order to place them into known states at specific times relative to the digital signals sent to them for transmission. As a result of this method, the digital signals transmitted by each of the transmitters will be identical to one another so that the receivers will be able to identify one received signal as the main signal and the others as echoes. If necessary, the signal transmitted by at least one of the synchronized transmitters may be delayed, such that identical digital signals received from at least two of the transmitters by receivers in the region will arrive at each receiver within a prescribed time window. The methods and apparatus also can be applied to one or a plurality of RF transmitters for purposes of synchronizing processes at the source of the signals and at the transmitters.
Owner:WEISS S MERRILL

Digital signal transmitter synchronization system

InactiveUS20100195760A1Reduce the burden onDesign of single frequency networks more flexibleTelevision system detailsModulated-carrier systemsEngineeringCarrier modulation
Methods, and apparatus for carrying out the methods, are disclosed for synchronizing a plurality of RF transmitters that are supplied with a common digital information signal for carrier modulation and subsequent transmission on a common channel throughout a prescribed region, whereby the digital signal receivers within the region may receive transmissions on the channel from more than one transmitter. The method involves inserting reference signals into the data sent to the transmitters in order to place them into known states at specific times relative to the digital signals sent to them for transmission. As a result of this method, the digital signals transmitted by each of the transmitters will be identical to one another so that the receivers will be able to identify one received signal as the main signal and the others as echoes. If necessary, the signal transmitted by at least one of the synchronized transmitters may be delayed, such that identical digital signals received from at least two of the transmitters by receivers in the region will arrive at each receiver within a prescribed time window. The methods and apparatus also can be applied to one or a plurality of RF transmitters for purposes of synchronizing processes at the source of the signals and at the transmitters.
Owner:WEISS S MERRILL

Digital signal transmitter synchronization system

InactiveUS7924347B2Reduce the burden onDesign of single frequency networks more flexibleTelevision system detailsModulated-carrier systemsCarrier modulationSpecific time
Methods, and apparatus for carrying out the methods, are disclosed for synchronizing a plurality of RF transmitters that are supplied with a common digital information signal for carrier modulation and subsequent transmission on a common channel throughout a prescribed region, whereby the digital signal receivers within the region may receive transmissions on the channel from more than one transmitter. The method involves inserting reference signals into the data sent to the transmitters in order to place them into known states at specific times relative to the digital signals sent to them for transmission. As a result of this method, the digital signals transmitted by each of the transmitters will be identical to one another so that the receivers will be able to identify one received signal as the main signal and the others as echoes. If necessary, the signal transmitted by at least one of the synchronized transmitters may be delayed, such that identical digital signals received from at least two of the transmitters by receivers in the region will arrive at each receiver within a prescribed time window. The methods and apparatus also can be applied to one or a plurality of RF transmitters for purposes of synchronizing processes at the source of the signals and at the transmitters.
Owner:WEISS S MERRILL

Food material management method and system of refrigerator for blind persons

The invention relates to a food material management method and system of a refrigerator for blind persons. The food material management method comprises the steps that the variety of a target food material to be put into the refrigerator for the blind persons is recognized after a door body of the refrigerator for the blind persons is opened; according to the recognized variety of the target foodmaterial, a target storage area of the target food material is determined; a user is prompted to place the target food material into the determined target storage area. The food material management system comprises a recognition device, a data processing device and a prompting device, wherein the recognition device is arranged to recognize the variety of the target food material after the door body is opened, the data processing device is arranged to determine the target storage area according to the recognized variety of the target food material, and the prompting device is arranged to controllably send prompt information of storing the target food material into the target storage area. The randomness and blindness of storing food materials by blind users are overcome, the blind users canclassify and store the food materials so that the blind users can quickly select the food materials, and then the blind users can normally and conveniently use the refrigerator for the blind persons.
Owner:HAIER SMART HOME CO LTD +1

Anti-floating water level value taking method in which long-observing water levels and historical rainfall in latest 3-5 years are utilized

The invention discloses an anti-floating water level value taking method in which long-observing water levels and historical rainfall in latest 3-5 years are utilized. The change law of the long-observing water levels along with the rainfall and a function relation are obtained according to the long-observing water levels and rainfall data of a site in latest 3-5 years, and then according to a reconnaissance inter-phase maximum water level, the reconnaissance inter-phase rainfall and the historical highest rainfall data, the highest historical water level value of the site is calculated and obtained as a water level value for prevention of up-floating of the site. According to the anti-floating water level value taking method in which the long-observing water levels and historical rainfall in latest 3-5 years are utilized, the long-observing water levels and the historical rainfall data in latest 3-5 years are utilized, through quantitative calculation, the highest historical water level value of the site is obtained as the water level value for prevention of up-floating of the site. Unreasonableness and randomness in taking the water level value for prevention of up-floating due to human factors of reconnaissance personnel are effectively overcome, a detailed and achievable calculating method of the water level for prevention of up-floating is provided, and the randomness in industry value taking is normalized.
Owner:CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD +1

Current transformer polarity measuring device

PendingCN110389280ASolve the problem of time-consuming and laborious preparationOvercome randomnessElectric winding testingElectricityMeasurement device
The invention relates to the field of polarity measurement of current transforms, and especially relates to a current transformer polarity measuring device. The current transformer polarity measuringdevice comprises a device body and an external primary test line hook and a secondary test line; the device body comprises a power module, a polarity indicating module and a primary pressurization control module; the power module is electrically connected with the primary pressurization control module; the primary pressurization control module is connected with a primary side of a current transformer through the primary test line hook; the primary pressurization control module controls the voltage output of the power module, and performs primary pressurization on the current transformer; and the polarity indicating module is connected with a secondary side of the current transformer through the secondary test line, and the polarity indicating module is used for current measurement and indicating the polarity. According to the current transformer polarity measuring device provided by the invention, the primary pressurization mode is improved, the primary pressurization can be carried out without climbing, and a polarity measurement operation of the current transformer can be completed only by one person, which is convenient and rapid; and besides, the safety risk is reduced, manpower and material resources are saved, and considerable economic benefits are achieved.
Owner:GUANGDONG POWER GRID CO LTD +1

A Quantitative Method for Grassland Ecological Carrying Capacity Based on Structural Dynamics

The invention relates to a grassland ecological carrying capacity quantification method based on structural dynamics. According to the method, the principle of the structural dynamics is mainly utilized to carry out grassland ecological carrying capacity research, the mass, damping, rigidity and load in a structural dynamic equation are subjected to physical meaning analogy to express grassland mass, grassland potential, grassland restoring force and grassland pressure respectively, and therefore quantification of the grassland ecological carrying capacity is realized; on the basis of index system construction, standardized processing, external pressure action displacement calculation, grassland loading capacity calculation and other processes, the grassland ecological carrying capacity is quantitatively expressed into a specific value of grassland loading capacity and external pressure action displacement, namely the loading capacity of unit displacement. The method is applied to grassland ecological carrying capacity measurement, dynamic process monitoring, scenario estimation and impact factor identification and can also be applied to quantitative measurement of the carrying capacity of resources, environment and socioeconomic systems to provide guidance for carrying capacity improvement and sustainable development decision making.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI

Flotation froth working condition identification method based on co-occurrence augmented matrix in dual-tree complex wavelet domain

The invention belongs to the technical field of flotation foam industrial and mining identification, and in particular relates to a flotation foam working condition identification method based on a double-tree complex wavelet domain co-occurrence augmentation matrix. The method includes performing dual-tree complex wavelet transform on the image to extract the high and low frequency subgraphs of the image; calculating the gray level co-occurrence augmented matrix of each subgraph based on the dual-tree complex wavelet transform; calculating the eigenvalues ​​of each augmented matrix; Industrial and mining identification model; the eigenvalues ​​of the augmented matrix are used as input feature vectors of the flotation industrial and mining identification model for identification of flotation working conditions. The invention can accurately and quickly realize the working condition recognition of the flotation foam image, avoid the subjectivity and arbitrariness of manual observation, provide the possibility for the optimization control of flotation production, ensure the economic benefits and production efficiency of the enterprise, and ensure the Sustainable development of mineral resources.
Owner:NORTHEASTERN UNIV LIAONING

Material management method and food material management system for refrigerators for the blind

The invention relates to a food material management method and system of a refrigerator for blind persons. The food material management method comprises the steps that the variety of a target food material to be put into the refrigerator for the blind persons is recognized after a door body of the refrigerator for the blind persons is opened; according to the recognized variety of the target foodmaterial, a target storage area of the target food material is determined; a user is prompted to place the target food material into the determined target storage area. The food material management system comprises a recognition device, a data processing device and a prompting device, wherein the recognition device is arranged to recognize the variety of the target food material after the door body is opened, the data processing device is arranged to determine the target storage area according to the recognized variety of the target food material, and the prompting device is arranged to controllably send prompt information of storing the target food material into the target storage area. The randomness and blindness of storing food materials by blind users are overcome, the blind users canclassify and store the food materials so that the blind users can quickly select the food materials, and then the blind users can normally and conveniently use the refrigerator for the blind persons.
Owner:HAIER SMART HOME CO LTD +1
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