摘要 :
Extensive technologies have been employed to explore a best way for cross-lingual transfer learning. In medical domain, Named Entity Recognition is pivotal for many downstream tasks, such as medical entity linking and clinical dec...
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Extensive technologies have been employed to explore a best way for cross-lingual transfer learning. In medical domain, Named Entity Recognition is pivotal for many downstream tasks, such as medical entity linking and clinical decision support systems. Nevertheless, the lack of annotation limits the applicability in many languages without enough labeled data. To alleviate this issue and make use of languages with sufficient annotated data, we find a new way to obtain medical parallel corpus from medical terminology systems and knowledge bases and propose a methodology which combines cross-lingual language model pre-training and bilingual word embedding alignment with the help of the parallel corpus. Moreover, our combined architecture which maintains the framework of pretrained model can not only be used for NER task but also other downstream NLP tasks. Experiments demonstrated that incorporating Chinese and English medical data can effectively improve the performance for an English medical NER dataset (i2b2).
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摘要 :
Extensive technologies have been employed to explore a best way for cross-lingual transfer learning. In medical domain, Named Entity Recognition is pivotal for many downstream tasks, such as medical entity linking and clinical dec...
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Extensive technologies have been employed to explore a best way for cross-lingual transfer learning. In medical domain, Named Entity Recognition is pivotal for many downstream tasks, such as medical entity linking and clinical decision support systems. Nevertheless, the lack of annotation limits the applicability in many languages without enough labeled data. To alleviate this issue and make use of languages with sufficient annotated data, we find a new way to obtain medical parallel corpus from medical terminology systems and knowledge bases and propose a methodology which combines cross-lingual language model pre-training and bilingual word embedding alignment with the help of the parallel corpus. Moreover, our combined architecture which maintains the framework of pretrained model can not only be used for NER task but also other downstream NLP tasks. Experiments demonstrated that incorporating Chinese and English medical data can effectively improve the performance for an English medical NER dataset (i2b2).
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Indoor localization algorithm based on WIFI has attracted much attention due to its high localization accuracy, universal applicability and no need for additional equipment. However, when the indoor environment changes dynamically...
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Indoor localization algorithm based on WIFI has attracted much attention due to its high localization accuracy, universal applicability and no need for additional equipment. However, when the indoor environment changes dynamically, the environment has different degrees of influence on access points (APs) communication in different regions. The traditional fingerprint localization algorithm cannot take into account the situation of abnormal received signal strength indication (RSSI) in different areas. This paper proposes an indoor security localization algorithm based on location discrimination ability of AP (SLABLDA), which is robust to indoor complex abrupt environments. In the offline detection phase, the AP location discrimination ability detection model is proposed to detect the location discrimination ability of AP in different regions in indoor complex abrupt environment. In the online phase, a fingerprint distance adjustment algorithm based on the minimum difference of RSSI is proposed to eliminate the abnormal RSSI interference caused by the regional dynamic environment. Through experiments we demonstrate the proposed method can effectively filter the influence of abnormal RSSI in indoor complex abrupt environment and can improve the localization accuracy effectively compared with the existing fingerprint localization algorithm.
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摘要 :
Indoor localization algorithm based on WIFI has attracted much attention due to its high localization accuracy, universal applicability and no need for additional equipment. However, when the indoor environment changes dynamically...
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Indoor localization algorithm based on WIFI has attracted much attention due to its high localization accuracy, universal applicability and no need for additional equipment. However, when the indoor environment changes dynamically, the environment has different degrees of influence on access points (APs) communication in different regions. The traditional fingerprint localization algorithm cannot take into account the situation of abnormal received signal strength indication (RSSI) in different areas. This paper proposes an indoor security localization algorithm based on location discrimination ability of AP (SLABLDA), which is robust to indoor complex abrupt environments. In the offline detection phase, the AP location discrimination ability detection model is proposed to detect the location discrimination ability of AP in different regions in indoor complex abrupt environment. In the online phase, a fingerprint distance adjustment algorithm based on the minimum difference of RSSI is proposed to eliminate the abnormal RSSI interference caused by the regional dynamic environment. Through experiments we demonstrate the proposed method can effectively filter the influence of abnormal RSSI in indoor complex abrupt environment and can improve the localization accuracy effectively compared with the existing fingerprint localization algorithm.
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The corrosion degradation of metallic components in Concentrated Solar Power Plants (CSP) with molten salt poses significant threat to the continuous safe operation at high temperature. Updated understanding of the corrosion behav...
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The corrosion degradation of metallic components in Concentrated Solar Power Plants (CSP) with molten salt poses significant threat to the continuous safe operation at high temperature. Updated understanding of the corrosion behavior, mechanisms and the properties of corrosion products formed are needed to explain and optimize the corrosion performance of metals. In this study, the corrosion behavior of 321 SS, 347 SS, Alloy 625 and Alloy 825, are investigated in nitrate salt for 7, 14 and 28 days under isothermal; at 565℃, and thermal cycling conditions (between 565 and 290℃) in air. Several corrosion and advance surface evaluation techniques were implemented to characterize the corrosion process. The results show that the corrosion rate after thermal cycles is lower than in isothermal condition. This was due to increased spallation of corrosion products under isothermal test condition than during thermal cycling tests; particularly in stainless steel samples after 28 days. Multilayer corrosion products were observed on the surface of stainless steels and Ni-based alloys from both isothermal and thermal cycling tests. For stainless steels, an outer layer of sodium iron oxide, intermediate iron oxide and an inner layer of iron chromium spinel were found. NiO and Cr-rich oxides that were detected on the surface of Ni-based alloy, serve as protective layers against further corrosion processes.
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A study to investigate the influence of monoethylene glycol (MEG) on inhibition of corrosion in acid CO_2 saturated conditions in wet gas pipelines (carbon steel) was performed. MEG is a thermodynamic hydrate inhibitor. The quest ...
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A study to investigate the influence of monoethylene glycol (MEG) on inhibition of corrosion in acid CO_2 saturated conditions in wet gas pipelines (carbon steel) was performed. MEG is a thermodynamic hydrate inhibitor. The quest for energy encourages more offshore gas development and operation. The integrity of the entire pipeline for the transportation of gas from source to process facilities onshore is very important. With the conditions encountered in the transportation of gas, severe corrosion can occur on the pipeline without proper inhibition. This paper describes the efforts in preventing the corrosion of the gas pipelines in the presence of MEG using commercially-available corrosion inhibitors and discusses the corrosion inhibition mechanisms. The effect of under-dosing of the inhibitor is also highlighted.
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摘要 :
A study to investigate the influence of monoethylene glycol (MEG) on inhibition of corrosion in acid CO_2 saturated conditions in wet gas pipelines (carbon steel) was performed. MEG is a thermodynamic hydrate inhibitor. The quest ...
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A study to investigate the influence of monoethylene glycol (MEG) on inhibition of corrosion in acid CO_2 saturated conditions in wet gas pipelines (carbon steel) was performed. MEG is a thermodynamic hydrate inhibitor. The quest for energy encourages more offshore gas development and operation. The integrity of the entire pipeline for the transportation of gas from source to process facilities onshore is very important. With the conditions encountered in the transportation of gas, severe corrosion can occur on the pipeline without proper inhibition. This paper describes the efforts in preventing the corrosion of the gas pipelines in the presence of MEG using commercially-available corrosion inhibitors and discusses the corrosion inhibition mechanisms. The effect of under-dosing of the inhibitor is also highlighted.
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摘要 :
A study to investigate the influence of monoethylene glycol (MEG) on inhibition of corrosion in acid CO2 saturated conditions in wet gas pipelines (carbon steel) was performed. MEG is a thermodynamic hydrate inhibitor. The quest f...
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A study to investigate the influence of monoethylene glycol (MEG) on inhibition of corrosion in acid CO2 saturated conditions in wet gas pipelines (carbon steel) was performed. MEG is a thermodynamic hydrate inhibitor. The quest for energy encourages more offshore gas development and operation. The integrity of the entire pipeline for the transportation of gas from source to process facilities onshore is very important. With the conditions encountered in the transportation of gas, severe corrosion can occur on the pipeline without proper inhibition. This paper describes the efforts in preventing the corrosion of the gas pipelines in the presence of MEG using commercially-available corrosion inhibitors and discusses the corrosion inhibition mechanisms. The effect of under-dosing of the inhibitor is also highlighted.
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摘要 :
A study to investigate the influence of monoethylene glycol (MEG) on inhibition of corrosion in acid CO_2 saturated conditions in wet gas pipelines (carbon steel) was performed. MEG is a thermodynamic hydrate inhibitor. The quest ...
展开
A study to investigate the influence of monoethylene glycol (MEG) on inhibition of corrosion in acid CO_2 saturated conditions in wet gas pipelines (carbon steel) was performed. MEG is a thermodynamic hydrate inhibitor. The quest for energy encourages more offshore gas development and operation. The integrity of the entire pipeline for the transportation of gas from source to process facilities onshore is very important. With the conditions encountered in the transportation of gas, severe corrosion can occur on the pipeline without proper inhibition. This paper describes the efforts in preventing the corrosion of the gas pipelines in the presence of MEG using commercially-available corrosion inhibitors and discusses the corrosion inhibition mechanisms. The effect of under-dosing of the inhibitor is also highlighted.
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摘要 :
A study to investigate the influence of monoethylene glycol (MEG) on inhibition of corrosion in acid CO_2 saturated conditions in wet gas pipelines (carbon steel) was performed. MEG is a thermodynamic hydrate inhibitor. The quest ...
展开
A study to investigate the influence of monoethylene glycol (MEG) on inhibition of corrosion in acid CO_2 saturated conditions in wet gas pipelines (carbon steel) was performed. MEG is a thermodynamic hydrate inhibitor. The quest for energy encourages more offshore gas development and operation. The integrity of the entire pipeline for the transportation of gas from source to process facilities onshore is very important. With the conditions encountered in the transportation of gas, severe corrosion can occur on the pipeline without proper inhibition. This paper describes the efforts in preventing the corrosion of the gas pipelines in the presence of MEG using commercially-available corrosion inhibitors and discusses the corrosion inhibition mechanisms. The effect of under-dosing of the inhibitor is also highlighted.
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