Existing methods based on statistical models ignore the detail effect of real environment path loss, leading to some discrepancies with actual results in urban environments. In order reduce and improve unmanned aerial vehicle (UAV) coverage effect, a multi-UAV method deterministic radio wave propagation is proposed. First, ray-tracing method, as one models, used simulate loss. Next, cooperative...

The 18th National Congress of the Communist Party China proposed to place ecological civilization construction in important position “five one”, and with transformation economic development mode, focusing on high-quality, scientific, reasonable urban model has become research focus experts scholars, certain theories And practical significance. Taking opportunity Dongying being rated as an “Inte...

With changing climate, coastal areas are facing increasingly threats from the typhoon–rainstorm–storm surge-flood (TRSSF) chain. However, among various exposures of TRSSF chain, it is still a great challenge to quickly assess direct losses houses, due complex mechanisms underlying building damage. The objective this article therefore explore simple method assessing house caused by based on smal...

Beach width is an important factor for tourists’ comfort, and the backshore a swash zone where sediment moves quickly. Artificial sandy beaches focus on beach stability evolution. This paper based artificial project in Haikou Bay, where, view of existing conditions, new type profile that can protect berm without being eroded by large wave action. Numerical simulation XBeach model were conducted...

Exploring the determinants of residents’ willingness to pay (WTP) for water quality improvements is essential protecting and formulating effective governance policies. This paper applies double-bounded dichotomous contingent valuation method (CVM) determine WTP improvements, calculate average annual Haikou residents explore factors influencing improvements. Interpretive structural modeling (ISM...

In recent years, marine fungi have become an important source of active marine natural products. Former researches are limited in habitats selection of fungi with bioactive compounds. In this paper were to measure antibacterial and antitumor cell activity for secondary metabolites of marine fungi, which were isolated from different habitats in coastal regions. 195 strains of marine fungi were i...