SPIDER-WEB enables stable, repairable, and encryptible algorithms under arbitrary local biochemical constraints in DNA-based storage

DNA has been considered as a promising medium for storing digital information. Despite the biochemical progress in DNA synthesis and sequencing, novel coding algorithms need to be constructed under the specific constraints in DNA-based storage. Many functional operations and storage carriers were introduced in recent years, bringing in various biochemical constraints including but not confined to long single-nucleotide repeats and abnormal GC content. Existing coding algorithms are not applicable or unstable due to more local biochemical constraints and their combinations. In this paper, we design a graph-based architecture, named SPIDER-WEB, to generate corresponding graph-based algorithms under arbitrary local biochemical constraints. These generated coding algorithms could be used to encode arbitrary digital data as DNA sequences directly or served as a benchmark for the follow-up construction of coding algorithms. To further consider recovery and security issues existing in the storage field, it also provides pluggable algorithmic patches based on the generated coding algorithms: path-based correcting and mapping shuffling. They provide approaches for probabilistic error correction and symmetric encryption respectively.Comment: 30 pages; 12 figures; 2 table

Resilience Assessment of Hydrogen Integrated Energy System for Airport Electrification

In recent years, the idea of green aviation and environmental protection has received increasing attention from the aviation industry. Hydrogen energy has an important role in the transition to low-carbon energy systems. To address that, this article conducts the technoeconomic analysis for the hydrogen energy system, photovoltaic energy, battery storage system, electric auxiliary power unit (APU) of aircraft, and electric vehicles (EVs) into the electrified airport energy system. Specifically, the model quantifies aircraft electrical load based on passenger' travel behavior, establishes a corresponding APU load characteristic model, and establishes an EV charging load profile based on the flight schedule and sequencing algorithm. A mixed-integer linear programming optimization method based on life cycle theory was proposed to minimize the total costs of hydrogen-integrated energy systems for airports (HIES). However, the resilience advantages of hydrogen energy concerning power failure are little explored in existing academic research. Thus, a resilience assessment method and improvement measure were proposed for HIES. Case studies have been conducted under different optimal hydrogen energy integration configurations and disaster times with resilience assessment by considering periods when the power supply capacity of the grid is insufficient. The results show the effectiveness of the proposed method.</p

The Relationship Between the TiO2 Photocatalyst Deactivation, Regeneration and the Concentration of the Surface Adsorbed SO42-

Conference Name:1st International Congress on Advanced Materials. Conference Address: Jinan, PEOPLES R CHINA. Time:MAY 13-16, 2011.The photolysis ability and adsorption ability of TiO2 was detected and measured using acetaldehyde as a probe. The quantitative relationship between the TiO2 deactivation and the concentration of the surface adsorbed SO42- was obtained by intentional controls of the concentrations of the surface adsorbed SO42-. When the concentration of the surface adsorbed SO42- reached 2.0 wt%, the photolysis ability of the TiO2 photocatalyst decreased by 50%, and when the concentration was 2.9 wt%, the TiO2 adsorption ability decreased by 50%. 90% of the absorbed SO42- can be removed after the samples have been washed by overflowing water for 2 hours at a rate of 2 L.min(-1) and the photocatalytic activity can be regenerated. This work will help to predict the lifetime of TiO2 photocatalyst in actual applications as well as to understand its regenerations of the photocatalytic capability