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1415 results about "Evaluation function" patented technology

An evaluation function, also known as a heuristic evaluation function or static evaluation function, is a function used by game-playing computer programs to estimate the value or goodness of a position (usually at a leaf or terminal node) in a game tree. A tree of such evaluations is usually part of a minimax or related search paradigm which returns a particular node and its evaluation as a result of alternately selecting the most favorable move for the side on move at each ply of the game tree. The value is a quantized scalar, often in nths of the value of a playing piece such as a stone in go or a pawn in chess. n may be tenths, hundredths or other convenient fraction.

Information-processing device and information-processing system

For an information terminal to be operated by users for collecting predetermined pieces of information from remote information devices by free-space optical communication, the present invention provides a technique for suppressing the power consumption of the information terminal by minimizing the amount of calculation performed to collect the aforementioned information. According to the present invention, each information device emits ID light on which a low-frequency pilot signal is superimposed. The information terminal captures a series of frames of images including the ID light and locates the ID light within the images by the following steps: (1) creating multiple levels of binned images having different resolutions for each frame of the image; (2) calculating an evaluation index for each pixel within a target range of the binned images at each level, from the lowest to the highest resolution, where the target range is narrowed every time the process switches over to a lower level. In (2), the evaluation index is calculated by an evaluation function including fast Fourier transformation performed throughout the series of frames of images. The evaluation index thus calculated is compared with a threshold to determine whether the pixel concerned is receiving ID light. The present technique significantly reduces the number of pixel to be analyzed and evaluated, thereby decreasing the total number of arithmetic operations to be performed using the evaluation function. Thus, the power consumption is suppressed.
Owner:JAPAN SCI & TECH CORP +2

Integrated camera device and self-adapting automatic focus method

ActiveCN101494737AOvercoming the difficulty of judging the focus directionOvercome speedTelevision system detailsColor television detailsCamera lensSelf adaptive
The present invention relates to an integrated video camera device and self-adapting automatic focus method. The method includes: using climbing method to a curve composed of an evaluation function evaluating the definition and the definition evaluation values of multiple images acquired continuously, selecting a focus method base on the zooming situation, searching the peak of the curve and driving the lens to reach the focusing position corresponding to the peak of the curve, performing real time motion detection to the lens scenes upon searching the peak, driving the lens motor to startup a new cycle of automatic focus process when a certain degree of fuzzy is judged to appear on the lens scene or the moving scene varies and at a non-focus status. The invention has beneficial effects that the device and the method can effectively determine the focus direction in a variety of zoom magnifications, can 'recognize' images at fuzzy status and accelerate them out of the fuzzy status, and overcomes the problems of the traditional focus method that it is difficult to judge focus direction in the fuzzy region under high magnifications, and the traditional focus method has slow focus velocity and repeated oscillation.
Owner:HANGZHOU HIKVISION DIGITAL TECH

Information-processing device and information-processing system

For an information terminal to be operated by users for collecting predetermined pieces of information from remote information devices by free-space optical communication, the present invention provides a technique for suppressing the power consumption of the information terminal by minimizing the amount of calculation performed to collect the aforementioned information. According to the present invention, each information device emits ID light on which a low-frequency pilot signal is superimposed. The information terminal captures a series of frames of images including the ID light and locates the ID light within the images by the following steps: (1) creating multiple levels of binned images having different resolutions for each frame of the image; (2) calculating an evaluation index for each pixel within a target range of the binned images at each level, from the lowest to the highest resolution, where the target range is narrowed every time the process switches over to a lower level. In (2), the evaluation index is calculated by an evaluation function including fast Fourier transformation performed throughout the series of frames of images. The evaluation index thus calculated is compared with a threshold to determine whether the pixel concerned is receiving ID light. The present technique significantly reduces the number of pixel to be analyzed and evaluated, thereby decreasing the total number of arithmetic operations to be performed using the evaluation function. Thus, the power consumption is suppressed.
Owner:JAPAN SCI & TECH CORP +2

Chinese domain term recognition method based on mutual information and conditional random field model

The invention discloses a Chinese domain term recognition method based on mutual information and a conditional random field model. The Chinese domain term recognition method includes the following steps: (1) gathering domain text corpus and marking all the punctuations, spaces, numbers, ASSCII (American Standard Code for Information Interchange) characters and characters except Chinese characters in the corpus; (2) setting character strings and computing the mutual information values of the character strings, (3) computing the left comentropy and the right comentropy of every character string, (4) defining character string evaluation function, setting evaluation function threshold, computing the evaluation function values of every character string, determining that every character string is a word, comparing in sequence the evaluation function value of the former character with the evaluation function value of the latter character in the character string and segmenting character meaning character strings one by one, (5) utilizing conditional random fields to train a conditional random field model and recognizing domain terms with the conditional random field model. When the Chinese domain term recognition method is used to recognize terms, the data sparsity of legitimate terms is overcome, the amount of calculation of conditional random fields is reduced, and the accuracy of the Chinese domain term recognition is improved.
Owner:SHANGHAI UNIV

Path programming method based on A* algorithm capable of searching continuous neighborhoods

ActiveCN106441303AAvoid processing powerAvoid the problem of increasing stored dataNavigational calculation instrumentsNODALAlgorithm
The invention provides a path programming method based on an A* algorithm capable of searching continuous neighborhoods. The path programming method comprises the following steps: establishing an environment model by using a grid method according to the geometrical size of an existing barrier, and treating a circular barrier by considering UUV as a mass point, taking the maximum width of the barrier as a diameter and taking the center of gravity of the barrier as the original point; acquiring the grid size l according to the information of the barrier; determining an evaluation function f (x) of the A* algorithm according to an established grid map; determining evaluation cost h(y) of an optional point y according to features of neighborhoods and the A* algorithm; and finding out a node of the minimum evaluation function fmin of the neighborhoods according to the evaluation function of the A* algorithm capable of searching the continuous neighborhoods as a next way point, and implementing a UUV sea route plan step by step. By the path programming method based on the A* algorithm capable of searching continuous neighborhoods, the problem that an existing UUV path planning method has path smoothness difference and a non-shortest path in a global environment is solved.
Owner:HARBIN ENG UNIV

Underwater vehicle path planning method based on ocean current historical statistic information

The invention discloses an underwater vehicle path planning method based on ocean current historical statistic information, comprising the following steps of: determining a sailing region, rasterizing the sailing region, generating an ocean current field in the sailing region by an ocean current historical statistic database, taking an electronic chart as an environment field to simplify and combine obstacles, islands and phytal zones in the sailing region and generate a prohibited area, storing ocean current information and prohibited area information according to grids, creating a path evaluation function, searching for an optimal path by a particle swarm optimization algorithm, outputting the optimal path and ending the path planning process. In the method provided by the invention, the ocean current field closer to a true value is generated by the ocean current historical statistic database, under the condition of taking full account of ocean current influence, the path evaluation function is designed based on safety, economical efficiency and smoothness, the particle swarm optimization algorithm is used as a path searching algorithm to perform global path planning for the underwater vehicle so as to plan an underwater vehicle sailing path which is closer to a practical sailing path.
Owner:哈尔滨哈船导航技术有限公司

Cigarette tobacco leaf formulation design method

The invention discloses a method for designing the formulation combination of tobacco leaf, which comprises the following steps: the design objective of cigarette products is determined; the requirement for the main chemical composition of the objective is determined; according to the experience, formulation personnel preliminarily select one representative tobacco leaves respectively from base cigarette, auxiliary material cigarette and filler; according to the similarity of the base cigarette and the compatibility of the auxiliary material cigarette and the filler, the rest tobacco leaf materials are selected; the final tobacco leaf materials used for the formulation are determined by the formulation personnel according to the storage rate of tobacco leaf, absolute degree of association and smoke panel test; the formulation cost is taken as evaluation function of fitness, and the proportion of the chemical composition, the main materials, the auxiliary materials and the filler are taken as constraint condition, the genetic algorithm is searched. The invention overcomes the deficiency that the prior art can not ensure the aesthetic quality, product style and flue gas index of the formulation of tobacco leaf to be in accordance with design requirements, and provides a method which supplies multiple formulation combinations that are in accordance with requirements, reduces the cost and lightens the workload of the formulation personnel, thus being widely applied to the field of cigarette production.
Owner:CHINA TOBACCO CHUANYU IND
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