The MODerate Resolution Imaging Spectroradiometer (MODIS) is one of the key instruments for the NASA s Earth Observing System (EOS). The MODIS ProtoFlight Model (PFM) was launched on-board the EOS Terra spacecraft on December 18, 1999 and has been providing the science community and public users global data sets for the study of the land, oceans, and atmosphere for more than two and a half year...

Clusters of workstations provide a cost-effective, high performance parallel computing environment. These environments, however, are often shared by multiple users, or may consist of heterogeneous machines. As a result, parallel applications executing in these environments must operate despite unequal computational resources. For maximum performance, applications should automatically adapt exec...

General circulation models (GCMs) run at regional resolution or a continental scale. Therefore, these results cannot be used directly for local temperatures and precipitation prediction. Downscaling techniques are required to calibrate GCMs. Statistical downscaling (SDSM) the most widely bias correction of However, few studies have compared SDSM with multi-layer perceptron artificial neural net...

The Solar Diffuser (SD) is used for the MODIS reflective solar bands (RSB) calibration. An on-board Solar Diffuser Stability Monitor (SDSM) tracks the degradation of its on-orbit bi-directional reflectance factor (BRF). To best match the SDSM detector signals from its Sun view and SD view, a fixed attenuation screen is placed in its Sun view path, where the responses show ripples up to 10%, muc...

A novel topology multi-stage noise-shaping (MASH) delta-sigma modulator is proposed for 20-km digital mobile fronthaul (MFH) in this article. In the MASH structure, a newly designed feedback unit combined with traditional fourth-order sturdy structure to enhance capacity. The detailed comparison between conventional single (SDSM) and new presented 512/1024 quadrature amplitude modulation (QAM) ...

This paper presents a new parallel programming environment called ParADE to enable easy, portable, and high-performance computing for SMP clusters. Different from the prior studies, ParADE separates the programming model from the execution model: it enables shared-address-space programming while it realizes hybrid execution of message-passing and shared-address-space. To overcome the poor perfo...

Freshwater reservoirs are widely recognized as methane (CH4) emission hotspots. Existing research has shown that temperature and hydrological conditions significantly affect wetland CH4 cycling processes. However, the feedback of cycle to climate warming remains unclear for deep where seasonal water thermal stratification exists. This study combined a reservoir model Statistical DownScaling Mod...

The introduction of automated parcel locker (APL) systems is one possible approach to improve urban logistics (UL) activities. Based on the city Dortmund as case study, we propose a simulation-optimization integrating system dynamics simulation model (SDSM) with multi-period capacitated facility location problem (CFLP). We this integrated decision support tool for future APL implementations las...

In this paper, the performance of the portable OpenMP compiler on SDSM JIAJIA is analyzed using SPEC OMPM2001 benchmark. The overheads of parallel execution have been investigated from the aspects of thread management and task schedule, memory access and synchronization. To improve the performance, the page placement and data privatization techniques have been implemented for the optimization o...