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In maritime search and rescue, selecting the appropriate ships to operate search and rescue, are very important in life rescue and property salvage. According to the modern decision theory and fuzzy mathematics evaluation method on the different factors of ships (the professional degree, and the response time, etc.), this paper applies three kinds of multi-objective optimized selection method of maritime...
Methods of determining the search area is essential for carrying out Search and Rescue (SAR) work at sea. However, relevant techniques (e.g., determining the search area and SAR object query in maritime traffic accidents) lag far behind at present, in this paper we present a maritime SAR Drift Model which takes the maritime environmental factors such as currents, winds and ocean waves, as well as...
The Zijinshan orefield is a Cu–Au–Mo–Ag porphyry–epithermal mineralization system of Cretaceous age in southeastern China, comprising the Zijinshan high-sulfidation (HS) Au–Cu deposit, Luoboling porphyry Cu–Mo deposits, Yueyang low-sulfidation Au–Ag–Cu deposit, and Wuziqilong and Longjiangting intermediate-sulfidation (IS) Cu deposit. A number of Sn-(W)-sulfides occur in the Zijinshan orefield, including...
Micro RNAs (miRNAs) are single-stranded, endogenous ~22nt small non-coding RNAs (sncRNAs) that can play important regulatory roles in animals and plants by targeting mRNA for cleavage or translational repression. miRNAs which have very low expression levels or are expressed at specific stage are difficult to find by biological experiments. Also biological experiment only can find a small amount of...
Based on the Hess signature scheme, a new efficient ID-based verifiably encrypted signature scheme was proposed. The scheme had the less pairing operations, and adjudicator signed a guarantee to avoid refusing to extract the common signature when resolving conflicts, thereby exchange signature protocol's fairness was enhanced. Compared with the other schemes, the proposed scheme was more efficient...
As many ID-based verifiably encrypted signature schemes have key escrow problem and low efficiency, we propose a new efficient verifiably encrypted signature scheme using pairing operation. The half-trust private key generator generates user's private key components, and user generates another private key in the scheme, thus the key escrow is solved, the private key generator is prevented forging...
This article analyzes a continuous-review inventory system with random supply interruptions and random lead time which may be interrupted by a random number of supplier's OFF periods. The inventory with constant demand rate is managed by a (r;q1,q2,…,qm) policy and supplies from an unreliable sole supplier. By renewal theory and matrix Geometric method, the long-run average cost function is obtained...
The selection of Client is the key point of the operation in port, select an excellent client will make the use of resource more reasonable, and increase the benefit of port. A system of evaluation and selection indexes for coal client selection is put forward based on the fact of Qinhuangdao Port Group, and establish a model of the selection of coal client, then use rough sets extract the decision-making...
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