44results about How to "Balance loss" patented technology

The embodiment of the invention provides a rate matching method, a coding and decoding device and a communication device. The method comprises the steps of obtaining an information bit sequence and atarget code length M of a Polar code; when the target code length M satisfies a preset condition, encoding the information bit sequence by adopting a Polar code with a first mother code length N1, outputting a first encoded bit sequence, N1 being less than or equal to M, and N1 being an integer power of 2; repeating at least one part of bits of the first coding bit sequence to obtain a first target Polar code with the length of M; when the target code length M does not meet the preset condition, a Polar code with a second mother code length N2 is adopted to encode the information bit sequence,a second coded bit sequence is output, N2 is larger than or equal to M, and N2 is the integer power of 2; and the second coding bit sequence is shortened or punched to obtain a second target Polar code with the length of M. And under the condition that the coding gain loss is very small, a rate matching scheme based on repetition is adopted, so that the complexity of coding and decoding is reduced.

The invention relates to a seawater multi-effect membrane distillation desalination salinity valve opening flow control device, the structure of which comprises: microporous membrane, seawater desalination device, sea current mixing rod, seawater evaporator, salinity flow control device, microporous membrane Embedded and installed on the upper surface of the seawater desalinator, the sea current mixing rod is installed inside the seawater desalinator, and the seawater evaporator is embedded and installed at the bottom of the seawater desalinator. When the inflow of the seawater desalinator increases, the seawater inside the seawater The salinity becomes thinner under the dilution of excess seawater, and the content of hydrated metal ions in seawater decreases per cubic meter, which reduces the conductivity of the sea salt conductor inside the salinity flow control device, reduces the suction of the water flow control block, and makes the water flow The lowering of the control block reduces the water outlet of the water inlet area, so that the inflow of the seawater desalinator becomes smaller, so as to balance the heat loss of the water vapor passing through the microporous membrane, increase the water production ratio that is reduced due to the increase of the inflow, and increase the seawater desalination The water production rate of the device.

The invention relates to a topology construction and internet access method for an aviation ad-hoc network. In the method, a flight process is divided into five stages including a dormancy stage, a waiting stage, a take-off stage, a cruising stage and a landing stage; a corresponding topology construction and data transmission strategy is provided for a flight node in a specific flight stage, wherein a waiting node is used as a connection point between an ad-hoc network in the air and a ground network, passively accepts network access requests of other nodes, and is mainly responsible for data relay; on one hand, a take-off node rapidly establishes a link information table; on the other hand, the take-off node accepts a request of the waiting node, carries data of the ground network, and rapidly diffuses data of the ground network in the ad-hoc network in the air; a cruising node regularly updates the link information table, and selects the optimal and backup link to perform data exchange in the air according to a link distance and the link duration; and a landing node rapidly forwards the data of the network in the air to the waiting node, and finally forwards the data into the ground network. By means of the topology construction and internet access method for the aviation ad-hoc network disclosed by the invention, fully connected topology can be rapidly formed; and communication between the aviation ad-hoc network and the ground network is realized.

The invention discloses an all-dry multi-core optical unit and an optical cable. The optical unit includes an outer wall, a multi-core optical fiber, and an inner layer resin filled between the multi-core optical fiber and the outer wall; the resin modulus of the outer wall ranges from 1000 MPa to 1200 MPa; the inner layer resin, its modulus The ratio of the amount to the outer wall modulus is between 1:10 and 24. The optical cable includes one or more of the all-dry multi-core optical units and an outer sheath, and the optical fiber density is 8.39 cores / mm²~9.78 cores / mm². The invention fills the low-modulus resin between the multi-core optical fiber and the outer wall of the optical unit, optimizes the stress distribution, balances the micro-bending loss and the macro-bending loss through the coordination of the modulus of the outer wall and the inner layer resin, and can greatly reduce the damage caused by the all-dry type. The stress-sensitive defect caused by the lack of ointment buffer in the fiber optic cable. In the all-dry multi-core optical cable provided by the present invention, since the stress distribution of the optical fiber in the optical unit under the bending state is optimized, the optical fiber density is effectively improved.