Achieving high visibility in subcarrier wave quantum key distribution system

We study influence of quantum signal polarization distortions in the optical fiber on the interference pattern visibility in a subcarrier wave quantum key distribution system. An optical scheme of the polarization compensation unit is suggested, and dynamics of the QBER depending on the unit architecture is explored

Free-space subcarrier wave quantum communication

We experimentally demonstrate quantum communication in 10 dB loss outdoor atmospheric channel with 5 kbit/s bitrate using subcarrier wave coding method. Free-space link was organized by telescoping system with symmetric fiber-optic collimators

ТЕХНОЛОГИЯ УБОРКИ И ТРАНСПОРТИРОВКИ СЕМЕННОГО КАРТОФЕЛЯ

When engineering potatoes harvesting procedure for its optimization it is important to calculate precisely the quantity of machines, containers and workers who will be involved in harvesting process. This depends on the acreage and productivity. An output yield should be harvested in predetermined terms. Harvesting and transportation of potatoes in bags is obsolete technology which complicates and slows down process of harvest and transport operations. Agrarian introduce mechanization to reduce the level of manual work use or to exclude it completely. The authors offered container technology of harvesting, transportation and sorting of seed potatoes. The containers having identical amount and load-carrying capacity were made of different materials for check of this technology. Branded structure of the machines which can be used at harvesting was established. The main specifications were indicated. The authors determined shortcomings of the soft bags for potatoes harvesting and brought into focus benefits of containers use. The exact quantity of containers and machines for potatoes harvesting in the OOO Redkinskoye APC (Tver region) was calculated. The seed potatoes are grown there on 2.43 hectares. The time frames of harvesting were determined.При разработке технологического процесса уборки картофеля для его оптимизации важно точно рассчитать количество техники, тары и рабочих, которые будут задействованы в процессе уборки, в зависимости от площади посева и урожайности, так как урожай должен быть убран в заранее установленные сроки. Сбор и транспортировка картофеля в мешках - устаревшая технология, которая затрудняет и замедляет процесс уборочно-транспортных работ. Механизация призвана снизить уровень использования ручного труда или полностью исключить его. Предложена контейнерная технология уборки, транспортировки и сортировки семенного картофеля. Для проверки данной технологии разработали контейнеры, выполненные из разных материалов, но имеющие одинаковые объем и грузоподъемность. Установили марочный состав техники, которая может быть использована в процессе уборки, с указанием главных технических характеристик. Определили недостатки мягкой тары (мешков) для уборки картофеля и подчеркнули преимущества использования контейнеров. Рассчитали точное количество контейнеров и техники для осуществления процесса уборки картофеля на примере предприятия ООО «Редкинское АПК» (Тверской области), где на 2,43 га пашни выращивают семенной картофель. Определили временные интервалы процесса уборки

SEED POTATOES HARVESTING AND TRANSPORTATION TECHNOLOGY

When engineering potatoes harvesting procedure for its optimization it is important to calculate precisely the quantity of machines, containers and workers who will be involved in harvesting process. This depends on the acreage and productivity. An output yield should be harvested in predetermined terms. Harvesting and transportation of potatoes in bags is obsolete technology which complicates and slows down process of harvest and transport operations. Agrarian introduce mechanization to reduce the level of manual work use or to exclude it completely. The authors offered container technology of harvesting, transportation and sorting of seed potatoes. The containers having identical amount and load-carrying capacity were made of different materials for check of this technology. Branded structure of the machines which can be used at harvesting was established. The main specifications were indicated. The authors determined shortcomings of the soft bags for potatoes harvesting and brought into focus benefits of containers use. The exact quantity of containers and machines for potatoes harvesting in the OOO Redkinskoye APC (Tver region) was calculated. The seed potatoes are grown there on 2.43 hectares. The time frames of harvesting were determined