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This paper implements a Smoothed Particle Hydrodynamics simulation code and distributes it on a heterogeneous cluster. The theoretical analysis results show that treating GPU as equivalent peer of CPU rather than an assistant or a substitute is the most efficient way of using a CPU+GPU compute node. However, it raises complex challenges of heterogeneous cooperation. Our strategies of hybrid-level...
Wavelength switchable and dual-wavelength soliton operations are demonstrated in an erbium-doped fiber laser with three pieces of TI Bi2Se3 polyvinyl alcohol (Bi2Se3-PVA) film. Wavelength switchable operation from 1532 to 1557 nm could be achieved just by adjusting the pump power. With the appropriate settings of PC and pump power, a novel dual-wavelength soliton operation was observed. The dual-wavelength...
Known as “the kidney of earth”, wetland is one of the most productive ecosystems in the world, with huge environmental functions and ecological benefits. Remote sensing technology can obtain wetland-related parameters at a large scale repeatedly, making large-scale and rapid wetland ecosystem health assessment possible. In this study, we construct the “Element-Landscape-Society” conceptual model based...
Although there exist much work on GPU acceleration on the SPH method, the focus so far has been on the Euler equations in fluid mechanics. This paper presents GPU acceleration on the SPH method for the Navier-Stokes equations for both solid and fluid mechanics. We investigate and compare three CPU-GPU coupling models in terms of one large-scale parallel application code: (1) CPU?GPU (to only run hotspots...
Although there exist much work on GPU acceleration on the SPH method, the focus so far has been on the Euler equations in fluid mechanics. This paper presents GPU acceleration on the SPH method for the Navier-Stokes equations for both solid and fluid mechanics. We investigate and compare three CPU-GPU coupling models in terms of one large-scale parallel application code: (1) CPU?GPU (to only run hotspots...
Since high performance computing sustained petaflops in 2008, numerical simulation entered a new era to use 10K to 100K processor cores in one single run of parallel computing. In pursuit of petascale computing, the challenges of scalability must be addressed. Petapar is a highly scalable simulation framework which implements two popular meshfree/particle methods, the smoothed particle hydrodynamics...
The WLFZ in the Three Gorges area is alternately controlled and influenced by both water ecosystem and terrestrial ecosystem. Its ecological vulnerability and instability are significant. Taking small watershed as a unit of assessment, we select population density, urbanization intensity, temperature, precipitation, and humidity and vegetation coverage to construct the fluctuating zone wetland ecosystem...
In wireless sensor networks, sensor nodes are inherently restricted by insufficient hardware resources, such as computing capacity and battery lifetime. As a result, current key management schemes are difficult to be deployed in wireless sensor networks. This paper proposes a new key management method that the shared keys are dynamic updated for wireless sensor networks. The proposed scheme loads...
Forest biomass is an important indicator in carbon sequestration capacity and forest carbon budget evaluation, but there is less focus on shrub biomass. Multi-angle images provide the volume scattering information which could improve inversion accuracy. HJ-1 satellites are the sun synchronous recurrent frozen orbit small satellite constellation for environment and disaster monitoring and forecasting...
Glycine-lead was synthesized with glycine and lead hydroxide as raw materials. The optimum technological conditions were that molar ratio of glycine to lead hydroxide was 2∶1, reaction time was 6h, reaction temperature was70∼80°C and pH value was 6. The yield was 60.53%. Composition and structure of the complex were characterized by mass spectrometry and HyperChem software. Its composition was Pb(NHCH...
The main missions of HJ-1 satellite are to monitor pollution, ecosystem destruction and natural disasters. In recent years, Inhalable particle (PM10) has become the primary pollutant of major cities in China, which seriously affects the living environment of its residents. In this paper, we made use of high-resolution CCD data of HJ-1 satellite to monitor atmospheric inhalable particle (PM10) in Shenzhen...
Vegetation fractional cover which defines the amount of vegetation on the surface of the land, is a key parameter in land surface models. Based on a geometric-optical model in combination with linear spectral mixture analysis, this paper discusses the estimation of shrub fractional cover in Wushen Banner of Inner Mongolia in the Mu Us Sandland using HJ-1B image. Firstly, we acquire the surface reflectance...
As XML has become the standard of data exchange and express of Internet and e-commerce, it is being more and more widely used, while XML is a kind of self-described language, with a large number of redundant structural information, so that is the hot study now on how to use XML data stream to be reasonable and efficient. The existing compression techniques of XML require two-pass scan on data, which...
When tracking unknown number of targets, or number of targets varying with time, random finite sets are natural representations of multi-target sets and observations that allow multi-sensor multi-target filtering to fit in the unifying random set framework for data fusion. This paper presents a framework for tracking multiple targets and target types using random finite sets. Simulations are also...
This paper discusses considerations in choosing a chemical supply system for semiconductor fabs. We investigate the characteristics of three major supply systems, drum, lorry and dilution system. The initial costs and footprints are totally different among them. Based on the cost analysis, this paper provides a simple criterion of using the lorry supply system. Besides discussion, information of leading...
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