Search

Your search keyword '"Li, Wenjia"' showing total 1,109 results
Start Over Author "Li, Wenjia"
1,109 results on '"Li, Wenjia"'

7. Estimation and Prediction of Water Conservation Capacity in Shaanxi Province Based on the InVEST-PLUS Model

Author

ZHOU Pingping, LUO Yi, SONG Xiaoyan, WU Hao, WANG Gang, SHAN Weihua, ZHANG Ke, LIU Zhengjia, ZHANG Shimei, LI Wenjia, LI Sihao, SONG Songbai, and SUN Wenyi

Subjects
water conservation, invest model, plus model, land use, shaanxi province, Environmental sciences, GE1-350, Agriculture
Abstract

[Objective] This study was aimed to estimate the amount of water conservation in Shaanxi Province. [Methods] The InVEST model and PLUS model were coupled to calculate the water conservation amount in Shaanxi Province from 2000 to 2020 and predict the water conservation amount under land use changes in the future in 2030. [Results] The average water conservation amount in Shaanxi Province from 2000 to 2020 was 132.25 mm, with a spatial distribution characteristic of gradually increasing water conservation from north to south. From the perspective of vegetation types, forest land was the main body of water conservation in Shaanxi Province. The average annual water conservation amount was 199.55×108 m3. From the administrative region, Ankang City had the largest water conservation amount(308.96 mm). The total amount of water source conservation in 2030 will be 285.16×108 m3 and 8.68×108 m3 less than that in 2020. [Conclusion] The water conservation amount of Shaanxi Province will show a slight downward trend from 2020 to 2030 in the future.

Published
2024
Full Text
View/download PDF

8. Study on the numbing substance of Polygonatum Rhizoma based on steaming treatment

Author

WANG Jiaxuan, WANG Feng, LI Qingming, LI Wenjia, and SU Xiaojun

Subjects
polygonatum rhizoma, numbing substance, saponin, polyphenol, calcium oxalate crystal, steaming treatment, Food processing and manufacture, TP368-456
Abstract

Objective: To discover the material substances of the numbing characteristics in Polygonatum Rhizoma. Methods: Polygonati Rhizoma from eight regions were processed by the "nine-steam-nine-bask" method, and its content changes of saponin, polyphenol and calcium oxalate crystal at different steaming times were determined. The degree change of numbing was determined by the cell hemolysis test and sensory properties, and a correlation analysis of numbing was conducted. Results: With the increase of steaming times, the contents of polyphenol and saponin in Polygonati Rhizoma from different regions were initially increased and then decreased, while the content of calcium oxalate crystal and hemolysis rate and the sensory score of numbing decreased gradually. The correlation analysis results indicated that there was a significant positive correlation (P＜0.05) or a highly significant positive correlation (P＜0.01) between the content of calcium oxalate crystal and the numbing degree. SEM results showed that the structure of calcium oxalate crystal was gradually destroyed after steaming, which coincided with the change of numbing. Conclusion: This research proves that calcium oxalate crystal may be the key substance for the numbing in Polygonatum Rhizoma, which can provide a scientific basis for the study of the numbing elimination technology of Polygonatum Rhizoma.

Published
2024
Full Text
View/download PDF

37. Collective response in planar random-flip coherent metasurface by modulating multipole moments.

Author

Sun, Botian, Zheng, Kaihao, Jiang, Zhaoqi, Li, Wenjia, Lv, Bo, Li, Yuxiang, Zhu, Zheng, Guan, Chunying, and Shi, Jinhui

Subjects
PHYSICS, PERCENTILES
Abstract

We numerically and experimentally investigate collective resonant responses of coherent metasurfaces consisting of planar random-flip asymmetrically split rings. The collective narrow band response becomes broader and eventually disappears with increasing the percentage of flipped split rings. The exploited physical mechanism is the degraded collective response due to random microscopic multipole excitation. Our study provides a method to construct random metasurfaces and is helpful to have an insight into their underlying physics. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

40. SIAT: A Systematic Inter-Component Communication Analysis Technology for Detecting Threats on Android

Author

Hu, Yupeng, Jin, Zhe, Li, Wenjia, Xiang, Yang, and Zhang, Jiliang

Subjects
Computer Science - Cryptography and Security
Abstract

In this paper, we present the design and implementation of a Systematic Inter-Component Communication Analysis Technology (SIAT) consisting of two key modules: \emph{Monitor} and \emph{Analyzer}. As an extension to the Android operating system at framework layer, the \emph{Monitor} makes the first attempt to revise the taint tag approach named TaintDroid both at method-level and file-level, to migrate it to the app-pair ICC paths identification through systemwide tracing and analysis of taint in intent both at the data flow and control flow. By taking over the taint logs offered by the \emph{Monitor}, the \emph{Analyzer} can build the accurate and integrated ICC models adopted to identify the specific threat models with the detection algorithms and predefined rules. Meanwhile, we employ the models' deflation technology to improve the efficiency of the \emph{Analyzer}. We implement the SIAT with Android Open Source Project and evaluate its performance through extensive experiments on well-known datasets and real-world apps. The experimental results show that, compared to state-of-the-art approaches, the SIAT can achieve about 25\%$\sim$200\% accuracy improvements with 1.0 precision and 0.98 recall at the cost of negligible runtime overhead. Moreover, the SIAT can identify two undisclosed cases of bypassing that prior technologies cannot detect and quite a few malicious ICC threats in real-world apps with lots of downloads on the Google Play market.

Published
2020

Catalog

Books, media, physical & digital resources
See catalog results