Different type HTS filters for the applications in satellite microwave receivers have been developed, aiming for space communications and astronomy observations. The HTS filters have been integrated with cryogenic low noise amplifiers and Stirling cryocoolers forming receiver front-end subsystems, which have passed all space qualification environmental tests. The first Chinese space HTS subsystem was taken into space with a civilian experimental satellite for new technology on October 14, 2012. Data received from this satellite show that the HTS filter is working on orbit perfectly. Moreover, an ultra-wide band HTS filter with a notch has been developed for the applications of deep space exploration. A novel K-band receiver with both HTS passive and active devices is under development and is expected to work in the planned space VLBI system by 2020.
The system wide information management (SWIM) system infrastructure layer uses information‐centric networking (ICN) to implement the cache routing and sharing of air traffic information data. The SWIM network searches and forwards routes on the basis of content names. The variable length, hierarchical name structure, and routing updates caused by the frequent publication and deletion of content make the implementation of fast name routing lookup algorithms a significant but arduous task. To address this problem, this study designed a name matching mechanism on the basis of the hybrid structure of the Bloom filter and the Tree. Compared with the traditional Bloom filter search scheme, this search mechanism reduces the quantity of Bloom filter insertion entries and reduces the possibility of hash collisions. Compared with the traditional Tree search scheme, the proposed mechanism can effectively solve the problem of numerous memory accesses caused by extremely long name prefixes, improving the query efficiency. In addition, the proposed composite structure is compared with several methods, such as DIPIT and NPT, by analyzing the effects of layering, global delay and search speed. The experimental results show that the proposed structure has a favourable performance in terms of storage overhead and search speed.
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