Toggle navigation
Home
About Journal
Ethics Statement
Archive
Editorial Board
Contact Us
中文
Journals
Publication Years
Keywords
Search within results
(((BAI Yu[Author]) AND 1[Journal]) AND year[Order])
AND
OR
NOT
Title
Author
Institution
Keyword
Abstract
PACS
DOI
Please wait a minute...
For Selected:
Download Citations
EndNote
Ris
BibTeX
Toggle Thumbnails
Select
Abstractive Summarization Based on Fine-Grained Interpretable Matrix
WANG Haonan, GAO Yang, FENG Junlan, HU Min, WANG Huixin, BAI Yu
Acta Scientiarum Naturalium Universitatis Pekinensis 2021, 57 (
1
): 23-30. DOI:
10.13209/j.0479-8023.2020.082
Abstract
(
1347
)
HTML
PDF(pc)
(850KB)(
305
)
Knowledge map
Save
According to the great challenge of summarizing and interpreting the information of a long article in the summary model. A summary model (Fine-Grained Interpretable Matrix, FGIM), which is retracted and then generated, is proposed to improve the interpretability of the long text on the significance, update and relevance, and then guide to automatically generate a summary. The model uses a pair-wise extractor to compress the content of the article, capture the sentence with a high degree of centrality, and uses the compressed text to combine with the generator to achieve the process of generating the summary. At the same time, the interpretable mask matrix can be used to control the direction of digest generation at the generation end. The encoder uses two methods based on Transformer and BERT respectively. This method is better than the best baseline model on the benchmark text summary data set (CNN/DailyMail and NYT50). The experiment further builds two test data sets to verify the update and relevance of the abstract, and the proposed model achieves corresponding improvements in the controllable generation of the data set.
Related Articles
|
Metrics
|
Comments
(
0
)
Select
A Query Weighted-Based Method for User Modeling
HU Juan,BAI Yu,CAI Dongfeng
Select
Research on Entity Linking of Chinese Microblog
ZHU Min,JIA Zhen,ZUO Ling,WU Anjun,CHEN Fangzheng,BAI Yu
Acta Scientiarum Naturalium Universitatis Pekinensis
Abstract
(
916
)
PDF(pc)
(497KB)(
562
)
Knowledge map
Save
The authors focus on the task of entity linking of Chinese microblog in NLP&CC2013, taking Sina microblog data provided by CCF as training data and test data, and Yebol Chinese segmentation system as segmentation technology. A way of entity linking is proposed which links from knowledge base to search entity from thesaurus, using improved pinyin edit distance and suffix vocabulary matching method. The authors also propose a disambiguation method, and the method combine entity clustering disambiguation and similar entity disambiguation based on Baidu encyclopedia. In the task of Chinese microblog entity linking of CCF, this system performs as the third-most-correct-probability system with a correct rate of 0.8838 in ten systems. The result indicates that the proposed entity link and entity disambiguation has efficiency and the ability to apply noise in text.
Related Articles
|
Metrics
|
Comments
(
0
)
Select
A Novel Method for Characterizing Acid-Base Properties of Atmospheric Particulate Matter
SUN Qian,HUO Mingqun,XIE Peng,LI Jinlong,BAI Yuhua,LIU Zhaorong,WANG Xuesong
Acta Scientiarum Naturalium Universitatis Pekinensis
Abstract
(
745
)
Knowledge map
Save
Six representative acid-base components are proposed to quantitatively characterize acid-base properties of particulate matter. Micro-titration and determination of water-soluble ion concentrations are applied to water-soluble particulate matter extract, then the acid-base balance principle and the principle of charge conservation are adopted to calculate the concentrations of representative components. Polynomial regression is conducted to analyze the relationship between the amounts of hydrogen ions neutralized by particulate matter of unit mass and the initial pH values of absorption solutions, and a series of empirical equations are obtained, which are applicable to estimate the change in pH derived by the particles absorbed by the precipitation with lower ion concentrations.
Related Articles
|
Metrics
|
Comments
(
0
)
Select
Chemistry Character of Rain Water at Urban and Rural Areas in the North and Southeast of China
HUO Mingqun,SUN Qian,XIE Peng,BAI Yuhua,LI Jinlong,LIU Zhaorong,LU Sihua
Acta Scientiarum Naturalium Universitatis Pekinensis
Abstract
(
550
)
Knowledge map
Save
Samples for rain water were collected at four sites including Beijing city and Mazhuang Town in the north of China and Shenzhen city and Mangdang Mountain in the southeast of China. The pH values of precipitation, values of conductivity and concentrations of major water soluble ions were measured. The pH values of rainwater in Beijing City, Mazhuang Town, Shenzhen City and Mangdang Mountain were 6. 02, 5. 97, 4. 72 and 4. 81, respectively. The most abundant ions in the rainwater included SO
2-
4
,NH
+
4
, Ca
2+
and NO
-
3
.SO
2-
4
was still the major acid ion in rain and NH
+
4
was the most important neutralizing ion at these four sites. While the rainwater in the north of China was more severely polluted than that in the south, the acidity of the rain was greater in the south than that in the north. Enrichment factor was used to analyze the contribution from sea-water, soil and other sources to rainwater. Hysplit 4. 7 Model was used to indicate different chemical characters among different backward trajectories. The chemical characters of rainwater in Mazhuang Town were distinctly different among different trajectories and it was not significant among different trajectories in Shenzhen City and Mangdang Mountain.
Related Articles
|
Metrics
|
Comments
(
0
)
Select
Contributions of Washout Process of Particles to Ion Concentrations in Rainwater
XIE Peng ,HUO Mingqun ,SUN Qian ,LIU Zhaorong ,BAI Yuhua ,LI Jinlong
Acta Scientiarum Naturalium Universitatis Pekinensis
Abstract
(
646
)
Knowledge map
Save
The authors collected and analyzed three rainwater samples in Shenzhen in April and four rainwater samples in a rural area of Taian in July, 2007. The ion species in PM
2.5
and PM
10
concentrations were measured to get the influence of washout process of particles on ion concentrations in rainwater. Compared to that in Taian, the rainwater in Shenzhen showed higher ion concentrations and stronger acidity. The washout process made a more important contribution to ion concentrations in rainwater in Taian than in Shenzhen, because Taian had a more serious air pollution. The washout process of particles was very important. The scavenging ratios of Ca
2+
and Mg
2+
in PM
2+
were high for Ca
2+
, Mg
2+
mostly existed in coarse particles. NO
-
3
, NH
+
4
, Cl
-
and K
+
mainly existed in fine particles and had smaller scavenging ratios. SO
2
and H
2
SO
4
contributed a lot to the concentration of SO
2-
4
in rainwater and therefore SO
2-
4
had a high scavenging ratio.
Related Articles
|
Metrics
|
Comments
(
0
)
Select
The Consideration on Several Defects of Ecological Footprint Theory and Methodology
BAI Yu,ZENG Hui,WEI Jianbing
Acta Scientiarum Naturalium Universitatis Pekinensis
Abstract
(
680
)
Knowledge map
Save
On the basis of the previous studies, six key issues can be identified which are static state of the model, shortage of the flexibility of parameter choice, ignoring of the influence that socioeconomic factors give to the productivity of lands, unilateralism of the ecological accounting, weakness of sustainability assessments and overlooking the complexity of land quality or function. Furthermore, the authors point out another kind of defect that there is a conceptual shortage in original trade-correct method and suggest a series of methods to adjust ecological footprint model, then analyze the feasibility of these methods and discuss the challengeso as to perfect the ecological footprint theory and methodology.
Related Articles
|
Metrics
|
Comments
(
0
)
Select
Investigation of the Mechanisms of Isoprene and Monoterpene Emissions from Hevea brasiliensis in Xishuangbanna
WANG Zhihui,BAI Yuhua,WANG Xuesong,LIU Zhaorong
Acta Scientiarum Naturalium Universitatis Pekinensis
Abstract
(
851
)
Knowledge map
Save
Based on the authors investigation of the isoprene and monoterpene emissions from Hevea brasiliensis (H.B.K) Muell.-Arg in Xishuangbanna, it was found that the isoprene emission was low (emission factor varies between 0 and 1μgC·g
-1
h
-1
) and the monoterpene emissions were high (emission factor varies between 10 and 100μgC·g
-1
h
-1
). It was presumed that the scarcity of the isoprene synthase in the chloroplast of hevea brasiliensis leaves dominated the special emission character.
Related Articles
|
Metrics
|
Comments
(
0
)
Select
Study on the Characteristics of VOCs Source Profiles of Vehicle Exhaust and Gasoline Emission
LU Sihua,BAI Yuhua,ZHANG Guangshan,MA Jing
Acta Scientiarum Naturalium Universitatis Pekinensis
Abstract
(
1025
)
Knowledge map
Save
The volatile organic compounds source profiles of motor vehicle exhaust, gasoline vapor and liquid gasoline were determined by averaging the ratios of individual VOC species concentration to the total concentrion of all VOC species measured. The gasoline exhaust and diesel exhaust display similar distributions. The alkanes and alkenes below C4 are the most abundant compounds in liquefied petroleum gas exhaust. The compounds below C5 and above C6 are the major content in gasoline vapor and liquid gasoline respectively.
Related Articles
|
Metrics
|
Comments
(
0
)