Upgrading and advanced cleaning technologies for low-rank coals. Sihyun Lee, ... Jiho Yoo, in Low-Rank Coals for Power Generation, Fuel and Chemical Production, 2017. 4.1 Introduction. Low-rank coals—lignite and subbituminous coals—refer to the lowest and second lowest rank of coals. Unlike high-rank coals deposited in specific areas, low ...
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Low-Rank Adaptation (LoRA): LoRA (Hu et al., 2021) is a distinguished method for enhancing pa-rameter efficiency in the fine-tuning of large lan-guage models (LLMs). It innovatively employs low-rank matrix factorization to modify the weight matrices within a pre-trained model. For a given linear layer with weights W. 0.
In this study we propose to pretreat low-rank coals in non-polar solvent such as 1-methylnaphthalene below 400°C for converting them to a substitute for coking coals.
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Low-rank-coal flotation can be intensified by suitable particle surface modification technology. The addition of oily collectors (kerosene and diesel) is the most common method for coal particle surface modification.
An important paradigm of natural language processing consists of large-scale pre-training on general domain data and adaptation to particular tasks or domains. As we pre-train larger models, full fine-tuning, which retrains all model parameters, becomes less feasible. Using GPT-3 175B as an example -- deploying independent instances of …
A simple and efficient process for small-scale cleaning of poorly liberated, difficult-to-wash low-rank coal. Energy Sources Part A. 2019 doi: …
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Dead fish wash up on Texas Gulf Coast due to low oxygen. Officials said the species most impacted by this fish kill was the Gulf menhaden, and that the dead fish started washing ashore on Friday.
The sedimentation performance of low-rank coal was investigated by coprocessing with hard-to-treat saline wastewater from the coal chemical industry. The …
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Pyrolysis of low-rank coal could contribute toward the goal of upgrading coal quality, chemical feedstock and fuel production. This research investigated the combustion reactivity of char pyrolyzed from a low-rank sub-bituminous coal using a conventional fixed bed reactor and a novel reactor with internals at 0 kPa and − 40 kPa gauge pressures.
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Background: Diarrhoea accounts for 1.8 million deaths in children in low- and middle-income countries (LMICs). One of the identified strategies to prevent diarrhoea is hand washing. Objectives: To assess the effects of hand washing promotion interventions on diarrhoeal episodes in children and adults. Search methods: We searched the …
Several countries, such as Pakistan, which has vast low-grade coal resources of more than 185 billion tons (Butt et al. 2023;Munir and Khayyam 2020), rely on low-grade coal to harness this ...
Low-rank coal and poly fatty acid distillate characterization as a preparation of coal upgrading palm oil technology ..., International Seminar on Mineral and Coal Technology 23-24 June 2021, Bandung, Indonesia Citation Sihyun Lee et al 2021 IOP Conf. Ser.: Earth ... Fuel and Chemical Production (Elsevier) Upgrading and advanced …
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Figure 11.2 (Hill et al., 1989) shows properties of low-rank coals from different countries. Download : Download full-size image; ... Upgrading brings a number of beneficial effects, reducing most of the problems concerning low-rank coal utilization. Washing results in reductions in the amounts of mineral matter present, including a …
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Flotation is widely used for low-rank coal upgrading, although it is always inefficient due to its rough surface morphology and rich oxygen-containing functional groups. In this study, the environment-friendly vegetable oil 1030# was used to enhance the flotation performance of low-rank coal. The mechanism of 1030# enhancing the flotation …
Soil washing is widely considered as a common method of soil remediation. This study examined the developments in soil washing during the past 20 years via a bibliometric and systematic critical review. Different washing agents (inorganic and organic chelating agents and surfactants) exhibit different effects and mechanisms under varying …
This paper has performed the techno-economic analysis of four different scenarios for the selective removal of Na and Ca from a low-rank sub-bituminous coal, …
This paper addresses the washing kinetics of water-soluble Na ⁺ from two different low-rank Xinjiang coals using both fresh and used/recycled water to alleviate the ash-related fouling in low ...
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Hyperspectral images (HSIs) are often degraded by a mixture of various kinds of noise in the acquisition process, which can include Gaussian noise, impulse noise, dead lines, stripes, and so on. This paper introduces a new HSI restoration method based on low-rank matrix recovery (LRMR), which can simultaneously remove the Gaussian …
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