We report the synthesis of MoS 2 nanosheets supported Rh nanoclusters via a facile yet efficient molten salt electrolysis method followed by wet chemical reduction for electrocatalytic hydrogen evolution. In-depth study...

Lake Chaohu is a typically large shallow freshwater lake in China, experiencing long-term eutrophication and short period of drought. This study employs three-dimensional (3-D) hydrodynamic-ecological model to assess the impacts water transfer on flow, quality, their relationship, then reveals optimal strategies for achieving improved quality Chaohu. Results indicated that clean could dramatically increase flow rate decrease nutrient concentrations near inlets, while grade level not changed....

Abstract Layered double hydroxides (LDHs) are widely used as effective adsorbents for wastewater treatment due to their simple synthesis, controllable structure, strong stability, large surface area, and interfacial spacing. In this study, modified-biochar (BMBC) Mg/Al composite (Mg/Al-BC) were directly prepared using ball milling technology effectively adsorb As(V), nitrogen-rich biochar was obtained through pyrolysis shrimp shells precursors. Compared pristine biochar, the...

In this study, the temporal and spatial variations of groundwater drought using a Standardized Groundwater Level Index (SGI) were analyzed based on 40 monthly level observation wells from 1989 to 2012 in Jiangsu Province, China. Meteorological drought, calculated by Precipitation (SPI), was also included reveal its propagation impact process. Results showed that southern region faced more frequent droughts lower intensity, while northern less with higher intensity. Furthermore,...

Abstract Distributed hydrological water quality models are increasingly being used to manage natural resources at the catchment scale but there no calibration guidelines for selecting most effective gauging stations. In this study, we investigated influence of schemes on spatiotemporal performance a fully distributed process‐based model (mHM‐Nitrate) discharge and nitrate simulations Bode in central Germany. We single‐ two multi‐site where varied number stations each subcatchment represented...

Graph labelings related with communication networks have been extensively investigated because their applications to real problems. Some results on graph labellings are obtained here. Scale-free graphs coming from scale-free a few years ago. We use spanning trees study some important characteristics of networks, and obtain networks. Furthermore, we provide connections between invariants in order apply graph-theoretical methods network

The Mediterranean region is increasingly recognized as a climate change hotspot but highly underrepresented in hydrological studies. This study aims to investigate the effects on hydrology of Lakhmass catchment Tunisia. part Medium Valley Medjerda northwestern Tunisia that drains an area 126 km². First, Hydrologiska Byråns Vattenbalansavdelning light (HBV-light) model was calibrated and validated successfully at daily time step simulate discharge during 1981–1986 period. Nash Sutcliffe...

A recently discovered approach including de Brujin graphs and Eulerian circuits are used to DNA sequencing fragment assembly, simplify through a series of transformations on digraphs in the field bioinformatics. Since numbered provide underlying mathematical models studying wide variety seemingly unrelated practical applications, so graph colorings often divide large systems into subsystems. new labeling has been introduced investigated.

Bang-Jensen and Gutin considered the Bennett's model of chromosome arrangement in a cell an eukaryotic organism. By means graph-theoretic obtained by graph labellings, mathematicians found solution this biological system. reducing instance problem to standard problem, we may be able use well-known algorithms provide optimal solution, such as graphs bioinformatics. The bandwidth being one labellings provides link between syntactic structure constraint satisfaction complexity underlying search...

Distributed hydrological water quality models are increasingly being used to manage natural resources at the catchment scale but there no calibration guidelines for selecting most useful gauging stations. In this study, we investigated influence of schemes on spatiotemporal performance a fully distributed process-based model (mHM-Nitrate) discharge and nitrate simulations Bode in central Germany. We single- two multi-site where varied number stations each subcatchment represented different...

In 1982, Harary introduced the concept of Ramsey achievement game on graphs.Given a graph F with no isolated vertices.Consider following played complete K n by two players Alice and Bob.First, colors one edges blue, then Bob different edge red, so on.The first player who can formation in his color is winner.The minimum for which has winning strategy number , denoted a(F ).If we replace completed bipartite n,n get number, ba(F ).In seminal paper, proposed an open problem determining numbers...

Distribution and activity level of naturally occurring radon-222 (222Rn) isotope in groundwater represent an environmental concern worldwide. This is a key issue particularly arid environments where resources are vital due to limited recharge. In the investigation presented here, analysis 222Rn eastern part United Arab Emirates (UAE) performed. Groundwater was sampled from wells distributed clastic carbonate aquifers. The results indicate average at 142 Bq/L, with wide variation ranging 3...

In 1982, Harary introduced the concept of Ramsey achievement game on graphs. Given a graph $F$ with no isolated vertices. Consider following played complete $K_n$ by two players Alice and Bob. First, colors one edges blue, then Bob different edge red, so on. The first player who can formation in his color is winner. minimum $n$ for which has winning strategy number $F$, denoted $a(F)$. If we replace completed bipartite $K_{n,n}$, get number, $\operatorname{ba}(F)$. seminal paper, proposed an...

The EU Water Framework Directive (WFD) has emphasized that altered stream morphology and diffuse pollution are the two major pressures faced by European water bodies at catchment scales. Increasing efforts have been directed toward restoration to meet WFD standards for ecological health, but this work achieved limited success. One challenge is little known about how morphological changes (i.e., re-meandering) may affect nitrate retention within whole networks. We investigated issue in...

Distributed hydrological water quality models are increasingly being used to manage natural resources at the catchment scale but there no calibration guidelines for selecting most useful gauging stations. In this study, we investigated influence of schemes on spatiotemporal performance a fully distributed process-based model (mHM-Nitrate) discharge and nitrate simulations Bode in central Germany. We single- two multi-site where varied number stations each subcatchment represented different...