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您的检索式：作者名="ZHENG TengLong"
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| 1 | COVID-19 Public Opinion and Emotion Monitoring System Based on Time Series Thermal New Word Mining显示文摘With the spread and development of new epidemics,it is of great reference value to identify the changing trends of epidemics in public emotions.We designed and implemented the COVID-19 public opinion monitoring system based on time series thermal new word mining.A new word structure discovery scheme based on the timing explosion of network topics and a Chinese sentiment analysis method for the COVID-19 public opinion environment are proposed.Establish a“Scrapy-Redis-Bloomfilter”distributed crawler framework to collect data.The system can judge the positive and negative emotions of the reviewer based on the comments,and can also reflect the depth of the seven emotions such as Hopeful,Happy,and Depressed.Finally,we improved the sentiment discriminant model of this system and compared the sentiment discriminant error of COVID-19 related comments with the Jiagu deep learning model.The results show that our model has better generalization ability and smaller discriminant error.We designed a large data visualization screen,which can clearly show the trend of public emotions,the proportion of various emotion categories,keywords,hot topics,etc.,and fully and intuitively reflect the development of public opinion. | Yixian Zhang Jieren Cheng Yifan Yang Haocheng Li Xinyi Zheng Xi Chen Boyi Liu Tenglong Ren Naixue Xiong | 2020 | Computers, Materials & Continua2020，，9： | 1 |
| 2 | Analyzing the characterization of pore structures and permeability of diesel contaminated clays under different aging conditions显示文摘In this study,mercury intrusion porosimetry(MIP)and X-ray micro-computed tomography(XRµCT)were used to characterize the pore structures and investigate the permeability characteristics of clay after aging and contamination with diesel.The results of the MIP tests showed that aging leads to reductions in porosity and average diameter,as well as an increase in tortuosity.The XRµCT analysis yielded consistent results;it showed that aging renders pores more spherical and isotropic and pore surfaces smoother.This weakens the pore connectivity.Micromorphological analysis revealed that aging led to the rearrangement of soil particles,tighter interparticle overlapping,and a reduction in pore space.The combination of MIP and XRµCT provided a comprehensive and reliable characterization of the soil pore structure.An increased diesel content increased the porosity and average diameter and reduced the tortuosity of the pores.Mechanistic analysis showed that aging weakens interparticle cohesion;this causes large agglomerates to break down into smaller agglomerates,resulting in a tighter arrangement and a subsequent reduction in porosity.An increase in diesel content increases the number of large agglomerates and pore spaces between agglomerates,resulting in increased porosity.Both aging and diesel content can weaken the permeation characteristics of soil. | Yeyang CHUN Dong ZHOU Zonghui LIU Chenhui LIU Tenglong LIANG Dongpo SU Zheng HUANG | 2023 | Frontiers of Structural and Civil Engineering2023，17，8： | 0 |
| 3 | Elasticity tensor and ultrasonic velocities for anisotropic cubic polycrystal显示文摘The orientation distribution of crystallites in a polycrystal can be described by the orientation distribution function(ODF) . The ODF can be expanded under the Wigner D-bases. The expanded coefficients in the ODF are called the texture coefficients. In this paper,we use the Clebsch-Gordan expression to derive an explicit expression of the elasticity tensor for an anisotropic cubic polycrystal. The elasticity tensor contains three material constants and nine texture coefficients. In order to measure the nine texture coefficients by ultrasonic wave,we give relations between the nine texture coefficients and ultrasonic propagation velocities. We also give a numerical example to check the relations. | HUANG MoJia CHEN MengCheng ZHENG TengLong HUANG WeiFu | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，8： | 0 |
| 4 | Direction-dependent functions of physical properties for crystals and polycrystals显示文摘Some physical properties of crystals differ indirection n because crystal lattices are often anisotropic.A polycrystal is an aggregate of numerous tiny crystallites.Unless the polycrystal is an isotropic aggregate of crystallites,the physical properties of the polycrystal vary with n.The direction-dependent functions (DDF) for crystals andpolycrystals are introduced to describe the variations of thephysical properties in direction n. Until now there are fewpapers dealing systematically with relations between theDDF and the crystalline orientation distribution. Herein wegive general expressions of the DDF for crystals and polycrystals.We discuss the applications of the DDF in describingthe physical properties of crystals and polycrystals. | Mojia Huang Mengcheng Chen Tenglong Zheng | 2009 | Acta Mechanica Sinica2009，25，5： | 0 |
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