Coastal wetlands in Qinhuangdao play a vital role in the regional ecological environment. The value of the ecosystem services of the coastal wetland was evaluated in terms of provision services, regulation services, culture services and supporting services by particular methods. Results indicated that coastal wetland area in Qinhuangdao was about 39,918.00 hm2 and annual value of ecosystem services in 2015 was around 174.32 × 108 yuan (yuan: Chinese Currency, 6.5 yuan = 1 USD as of 2015) (about $2.68 billion). The value of provision services, regulation services, culture services and supporting services accounted for 12.3%, 3.3%, 55.0% and 29.4% of the total value, respectively. Recreation value of culture services had the highest proportion (54.4%), which indicated that recreation service was the crucial role of the coastal wetland in Qinhuangdao. Coastal wetland ecosystem of Qinhuangdao provides tremendous value through ecological products and purposes every year and conservation should be enhanced. Meanwhile, cultural connotation construction, such as the creation of a locally characteristic culture, should be specially enhanced to fully unearth its recreation value.
For recovering block-sparse signals with unknown block structures using compressive sensing, a block orthogonal matching pursuit- (BOMP-) like block generalized orthogonal matching pursuit (BgOMP) algorithm has been proposed recently. This paper focuses on support conditions of recovery of any
K
-sparse block signals incorporating BgOMP under the framework of restricted isometry property (RIP). The proposed support conditions guarantee that BgOMP can achieve accurate recovery block-sparse signals within
k
iterations.
The safety and security of straits and canals have been playing an important role in maritime transportation. The disruption of a strait or canal will lead to increased transportation costs and world trade problems. Therefore, an advanced approach incorporating fuzzy logic and an evidential reasoning (ER) algorithm is developed to conduct the vulnerability assessment of straits or canals in this paper. A hierarchical structure is first developed taking into account both qualitative and quantitative factors. The fuzzy rule‐based transformation technique is applied to convert quantitative factors into qualitative ones, which enables the application of a fuzzy ER method to synthesize all the information from the bottom to the top along the developed hierarchical structure. The software of intelligent decision system (IDS) is used to facilitate the process of vulnerability assessment. The developed framework then is validated and demonstrated in a case study for vulnerability prioritization which can be used as a reference to ensure the safety and security of straits and canals for decision‐makers.
This paper discusses the use of GIS in oilfield power system, combined with the basic concept and advantages of GIS, combined with the characteristics of the oilfield power system, put forward the overall design system of the oilfield power system, ensure the stability of the power system operation, give full play to the role of GIS.
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