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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 3. Отображено 3.
11-12-2013 дата публикации

Forest species group distribution pattern measurement method based on mingling degrees

Номер: CN103440415A
Автор: Hu Yanbo, Hui Gangying, Zhao Zhonghua
Принадлежит:

The invention discloses a forest species group distribution pattern measurement method based on mingling degrees. The method includes the steps that a forest sp distribution pattern is judged according to a forest sp distribution parameter t and an established statistic DM; if t is equal to or smaller than t(alpha=0.05, v=Nsp-1), forest sp distribution is judged to be of a random pattern; if t is larger than t(alpha=0.05, v=Nsp-1) and DM is smaller than 1, forest sp distribution is judged to be of a collective pattern, and if t is larger than t(alpha=0.05, v=Nsp-1) and DM is larger than 1, forest sp distribution is judged to be of an even pattern. By means of the method, the sp distribution pattern can be judged accurately, and the method is simple, clear and effective.

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Номер записи: 1
11-12-2013 дата публикации

Method for investigating forest density

Номер: CN103430785A
Автор: Hu Yanbo, Hui Gangying, Zhao Zhonghua
Принадлежит:

The invention discloses a method for investigating a forest density. The method comprises the steps of selecting n reference trees from a forest stand to be investigated; investigating a proportion of the number of a plurality of closest neighboring trees with crowns connected to each reference tree in investigated multiple closest neighboring trees, and taking the proportion as a density Ci, wherein the bigger the Ci, the higher a forest density of a structural unit of the reference tree is, and the smaller the Ci, the lower the forest density of the structural unit of the reference tree is; and taking a mean value of densities Ci of n reference trees as a forest density to be investigated, wherein the bigger the mean value, the denser the forest stand is, the higher a continuous coverage degree of a forest canopy is, and the higher an overall density is, conversely, the sparser the forest stand, the higher a possibility of gaps in the forest stand, and the lower the overall density of ...

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Номер записи: 2
27-11-2013 дата публикации

Method for quickly measuring forest stand tree height by individual tree locating

Номер: CN103411582A
Автор: Hui Gangying, Hu Yanbo, Zhao Zhonghua
Принадлежит:

The invention discloses a method for quickly measuring the forest stand tree height by individual tree locating. The method comprises the following steps: firstly obtaining coordinates of each individual tree in a forest through the inspection of a locating instrument; then finding out an individual tree with a measuring object which can be completely seen as a measuring point, measuring an angle of elevation from the measuring point to the highest point of the measuring object and an angle of depression or angle of elevation from the measuring point to the lowest point of the measuring object, calculating the horizontal distance of two trees according to the coordinates, and calculating the tree height of the measuring object by utilizing a triangle function. On the basis of known locating data of the individual trees, the tree height is measured without re-measuring the horizontal distance, and at most two angles are required to be measured during the actual inspection, so that the difficulty ...

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Номер записи: 3