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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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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 8. Отображено 8.
16-06-1987 дата публикации

Particle separation

Номер: US4673512A
Автор: Cornelius J. Schram
Принадлежит: Internationale Octrooi Mij "Octropa" BV

The separation of different types of particulate matter in a carrier liquid is obtained by using an ultrasonic standing wave and relying on the different acoustic responses of the different particle types. By varying the acoustic energy propagation cyclically a more effective separation rate can be obtained, with a more readily attracted particle type being subjected to a further discrimination step in each cycle. The cyclical energy variation may be in the intensity of the standing wave, e.g. using suppression means, and/or the velocity of the standing wave relative to the liquid medium, e.g. using phase control means.

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Номер записи: 1
10-05-1988 дата публикации

Manipulation of particles

Номер: US4743361A
Автор: Cornelius J. Schram
Принадлежит: Internationale Octrooi Mij "Octropa" BV

Separation of particles types from a mixed population of particles in a liquid is obtained in an ultrasonic wave produced by interference between the outputs from spaced ultrasonic sources (115,118). One or more selected particle types may be separated by displacement axially along the standing wave or may be carried transversely through the standing wave or by combining both methods. The described separation can be achieved by control of flow of the liquid or giving the standing wave a drift, or by controlling the intensity or the frequency of the standing wave or by any combination of these factors. The preferred ultrasonic frequency range is between 100 kHz and 100 MHz. The process is particularly suitable for the separation of biological particles, from macromolecules to plant cells.

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Номер записи: 2
31-10-1989 дата публикации

Manipulating particulate matter

Номер: US4877516A
Автор: Cornelius J. Schram
Принадлежит: National Research Development Corp UK

An acoustic standing wave is established in a fluid medium with a varying energy density in its nodal planes. Particles in the fluid medium responsive to the acoustic energy accumulate at these nodal planes and by the action of the variations of energy density in conjunction with the fluid viscous forces and/or field forces acting in the direction of the nodal planes, the movement of the particles held at these planes can be controlled. The adverse effects of attenuation of the acoustic beams producing the standing wave are reduced in this system, because any streaming due to imbalance of the acoustic forces forming the standing wave does not act in the direction in which the movement of the particles can be controlled.

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Номер записи: 3
07-11-1989 дата публикации

Process for controlling a reaction by ultrasonic standing wave

Номер: US4879011A
Автор: Cornelius J. Schram
Принадлежит: National Research Development Corp UK

Particulate material is supported in a fluid medium by means of an ultrasonic standing wave while a reaction is effected or controlled involving the material so supported, for example with the fluid medium or other material contained in the medium. In a preferred arrangement, the standing wave is established by opposed ultrasonic transducers producing convergent beams that compensate for attenuation of the ultrasonic energy in the fluid medium, and operating in the near field. The support provided by the standing wave is able to avoid settling of the particulate material in the medium and also agitates the material; both effects enhance the rate of chemical reaction and help to ensure that the particulate material is more uniformly exposed. The process has particular applications to biological reactions, such as fermentation, and to chromatography, as examples.

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Номер записи: 4
09-04-1991 дата публикации

Manipulating means utilizing ultrasonic wave energy for use with particulate material

Номер: US5006266A
Автор: Cornelius J. Schram
Принадлежит: National Research Development Corp UK

Particulate material influenced by the acoustic forces in an ultrasonic standing wave is manipulated in a liquid column (16) by the use of at least two standing waves having axes extending transversely across the column at different orientations to its longitudinal axis. The nodes of the standing waves intersect within the column to give regions of greatest acoustic influence that allows a relative displacement between the particles and the liquid in a direction transverse to the axes of the standing waves. The effects of acoustic streaming can be reduced and the physical arrangement of the ultrasound apparatus in relation to the column is simplified.

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Номер записи: 5
22-01-1991 дата публикации

Particle separation

Номер: USRE33524E
Автор: Cornelius J. Schram
Принадлежит: National Research Development Corp UK

The separation of different types of particulate matter in a carrier liquid is obtained by using an ultrasonic standing wave and relying on the different acoustic responses of the different particle types. By varying the acoustic energy propagation cyclically a more effective separation rate can be obtained, with a more readily attracted particle type being subjected to a further discrimination step in each cycle. The cyclical energy variation may be in the intensity of the standing wave, e.g. using suppression means, and/or the velocity of the standing wave relative to the liquid medium, e.g. using phase control means.

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Номер записи: 6
12-03-1991 дата публикации

Controlling particulate material

Номер: US4998553A
Автор: Cornelius J. Schram
Принадлежит: National Research Development Corp UK

The movement of particles in a liquid flowing in a duct is controlled by an ultrasonic standing wave having nodal fronts at a small angle to one pair of side walls of the duct. As the liquid flows along the duct, particles responsive to the acoustic energy are held on the oblique nodal fronts and are carried along these by the flow so that they also move towards one side wall. Particles in the vicinity of that one side wall are swept from the nodal fronts by the liquid drag forces. At the duct exit the particles will therefore tend to be concentrated in that portion of the liquid flow that passes nearer said one wall.

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Номер записи: 7
16-07-1991 дата публикации

Ultrasonic systems

Номер: US5033033A
Автор: Cornelius J. Schram
Принадлежит: National Research Development Corp UK

A method of establishing an ultrasonic standing wave in a fluid medium is described in which the standing wave is produced by an acoustic energy output along a path extending through the fluid medium, the frequency of said energy output being changed cyclically while maintaining an essentially constant mean frequency. The cyclic frequency change sweeps said energy output frequency between upper and lower limits that represent a difference of at least one half-wavelength at the mean acoustic frequency over the length of said path, so that a fully resonant standing wave appears in each cycle, regardless of transient ambient variations. For stability, the cycle time of the sweep is maintained substantially greater than the travel time of the acoustic energy output over the length of the path.

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Номер записи: 8