| 1. |
- Du, Gaoming, et al.
(författare)
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SSS : Self-aware System-on-chip Using a Static-dynamic Hybrid Method
- 2019
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Ingår i: ACM Journal on Emerging Technologies in Computing Systems. - : ASSOC COMPUTING MACHINERY. - 1550-4832 .- 1550-4840. ; 15:3
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Tidskriftsartikel (refereegranskat)abstract
- Network-on-Chip (NoC) has become the de facto communication standard for multi-core or many-core System-on-Chip (SoC) due to its scalability and flexibility. However, an important factor in NoC design is temperature, which affects the overall performance of SoC-decreasing circuit frequency, increasing energy consumption, and even shortening chip lifetime. In this article, we propose SSS, a self-aware SoC using a static-dynamic hybrid method that combines dynamic mapping and static mapping to reduce the hotspot temperature for NoC-based SoCs. First, we propose monitoring and thermal modeling for self-state sensoring. Then, in static mapping stage, we calculate the optimal mapping solutions under different temperature modes using the discrete firefly algorithm to help self-decisionmaking. Finally, in dynamic mapping stage, we achieve dynamic mapping through configuring NoC and SoC sentient units for self-optimizing. Experimental results show that SSS has substantially reduced the peak temperature by up to 37.52%. The FPGA prototype proves the effectiveness and smartness of SSS in reducing hotspot temperature.
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| 2. |
- Zhou, Guanyu, et al.
(författare)
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How many microplastics do we ingest when using disposable drink cups?
- 2023
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Ingår i: Journal of Hazardous Materials. - : Elsevier BV. - 0304-3894 .- 1873-3336. ; 441
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Tidskriftsartikel (refereegranskat)abstract
- Microplastics in food are receiving increasing attention because they are directly ingested by humans and pose a health threat. However, little attention has been paid to the microplastics resulting from the disposable drink cups. Here, we analyzed the microplastic contamination in beverages in three commonly used plastic cups (PP, PET, and PE cups). Effects of the cup materials, the residence time of the drink in the cup, shaking, and water temperatures on the microplastic release were systematically investigated. The results showed that the micro -plastic abundance in water reached 723???1,489 particles cup??? 1 after 5 min exposure and increased significantly with increasing residence time. The size of released microplastics was mainly in the range of < 50 ??m. The shaking applied during transport promoted the release of microplastics from plastic cups. Besides, the results showed that cups released more microplastics when serving hot drinks than serving cold drinks. Based on the results, we estimated that people may unconsciously ingest 37,613???89,294 microplastics a year due to the use of one plastic cup every 4???5 days. Considering the potential harm of microplastics, the contamination of micro -plastics resulting from the use of plastic cups for drinks needs to be taken seriously.
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| 3. |
- Zhou, Guanyu, et al.
(författare)
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Tracing microplastics in rural drinking water in Chongqing, China : Their presence and pathways from source to tap
- 2023
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Ingår i: Journal of Hazardous Materials. - : Elsevier BV. - 0304-3894 .- 1873-3336. ; 459
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Tidskriftsartikel (refereegranskat)abstract
- Despite the significant attention given to microplastics in urban areas, our understanding of microplastics in rural drinking water systems is still limited. To address this knowledge gap, we investigated the presence and pathways of microplastics in rural drinking water system, including reservoir, water treatment plant (WTP), and tap water of end-users. The results showed that the treatment processes in the WTP, including coagulation-sedimentation, sand-granular active carbon filtration, and ultrafiltration, completely removed microplastics from the influent. However, the microplastic abundance increased during pipe transport from WTP to residents’ homes, resulting in the presence of 1.4 particles/L of microplastics in tap water. This microplastic increase was also observed during the transportation from the reservoir to the WTP, suggesting that the plastic pipe network is a key source of microplastics in the drinking water system. The main types of polymers were PET, PP, and PE, and plastic breakdown, atmospheric deposition, and surface runoff were considered as their potential sources. Furthermore, this study estimated that rural residents could ingest up to 1034 microplastics annually by drinking 2 L of tap water every day. Overall, these findings provide essential data and preliminary insights into the fate of microplastics in rural drinking water systems.
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