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Segmented Summarization and Refinement:A Pipeline for Long-Document Analysis on Social Media

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Journal of Social Computing 2024年第2期5卷 132-144页

作者： guanghua wang Priyanshi Garg Weili Wu the Department of Computer Science The University of Texas at DallasRichardsonTX 75080USA

Social media’s explosive growth has resulted in a massive influx of electronic documents influencing various facets of daily ***,the enormous and complex nature of this content makes extracting valuable insights *** document summarization emerges as a pivotal technique in this context,serving to distill extensive texts into concise and comprehensible *** paper presents a novel three-stage pipeline for effective long document *** proposed approach combines unsupervised and supervised learning techniques,efficiently handling large document sets while requiring minimal computational *** methodology introduces a unique process for forming semantic chunks through spectral dynamic segmentation,effectively reducing redundancy and repetitiveness in the summarization *** to previous methods,our approach aligns each semantic chunk with the entire summary paragraph,allowing the abstractive summarization model to process documents without truncation and enabling the summarization model to deduce missing information from other *** enhance the summary generation,we utilize a sophisticated rewrite model based on Bidirectional and Auto-Regressive Transformers(BART),rearranging and reformulating summary constructs to improve their fluidity and *** studies conducted on the long documents from the Webis-TLDR-17 dataset demonstrate that our approach significantly enhances the efficiency of abstractive summarization *** contributions of this paper thus offer significant advancements in the field of long document summarization,providing a novel and effective methodology for summarizing extensive texts in the context of social media.

关键词： long document summarization abstractive summarization text segmentation text alignment rewrite model spectral embedding

Parametric adaptive time-frequency representation based on time-sheared Gabor atoms

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Journal of Systems Engineering and Electronics 2007年第1期18卷 1-7页

作者： Ma Shiwei Zhu Xiaojin Chen guanghua wang Jian Cao Jialin School of Mechatronical Engineering & Automation Shanghai Key Lab of Power Station Automation Technology Shanghai Univ. Shanghai 200072 E R. China

A localized parametric time-sheared Gabor atom is derived by convolving a linear frequency modulated factor, modulating in frequency and translating in time to a dilated Gaussian function, which is the generalization of Gabor atom and is more delicate for matching most of the signals encountered in practice, especially for those having frequency dispersion characteristics. The time-frequency distribution of this atom concentrates in its time center and frequency center along energy curve, with the curve being oblique to a certain extent along the time axis. A novel parametric adaptive time-frequency distribution based on a set of the derived atoms is then proposed using a adaptive signal subspace decomposition method in frequency domain, which is non-negative time-frequency energy distribution and free of cross-term interference for multicomponent signals. The results of numerical simulation manifest the effectiveness of the approach in time-frequency representation and signal de-noising processing.

关键词： Time-frequency analysis Gabor atom Time-shear Adaptive signal decomposition Time-frequency distribution.

Predicting toxicity of aromatic ternary mixtures to algae

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Chinese Science Bulletin 2009年第19期54卷 3521-3527页

作者： LU guanghua wang Chao wang PeiFang YANG ChengZhi Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes Ministry of Education College of Environmental Science and Engineering Hohai University Nanjing 210098 China

Aquatic ecosystems are often polluted with more than one type of contaminant, and information on the combined toxic effects of mixed pollutants on aquatic organisms is scarce at present. Acute toxicity of aromatic compounds and their ternary mixtures to the alga (Scenedesmus obliquus) was determined by the algae growth inhibition test. The median effective concentration (EC50) value for a single aromatic compound and EC50mix values for mixtures were obtained. the logarithm of n-octanol/water partition coefficient (logPmix) and the frontier orbital energy gap (ΔEmix) for mixtures were calculated. Based on the quantitative structure-activity relationship model for single chemical toxicity log(1/EC50) =0.426logP -1.150ΔE +12.61 (n=15, R2=0.917 and Q2=0.878), the following two-descriptor model was developed for the ternary mixture toxicity of aromatic compounds: log(1/EC50mix)=0.682logPmix-0.367ΔEmix+ 4.971 (n=44, R2=0.869 and Q2=0.843). This model can be used to predict the combined toxicity of mixtures containing toxicants with different mechanisms of action.

关键词：有毒物毒性芬芳化学制品

Oil Phase Molecular Compositions of Oily Sludge Using Mass Spectrometry

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China Petroleum Processing & Petrochemical Technology 2020年第4期22卷 21-25页

作者： Hu Lin LV Haipeng wang guanghua Guo Xianhou Key Laboratory of Coal Processing and Efficient Utilization Ministry of EducationChina University of Mining&TechnologyXuzhou 221116

Oily sludge was recognized as a kind of hazardous wastes,so recycling its high content of petroleum hydrocarbons can contribute to the clean *** this study,oily sludge was subjected to continous ultrasonic extraction with an acetone/carbon disulfide(CS2)mixture *** transform infrared spectroscopy(FTIRS),gas chromatography/mass spectrometry(GC/MS),and Quadrupole exactive Orbitrap mass spectrometry(QPEOTMS)were used to analyze the oil phase compounds from oily *** n-alkanes ranging from C8 to C31 hydrocarbons were detected in oil *** with the analysis results of GC/MS,more heteroatom-containing compounds(HACOCs)of oil phase such as O3,O4,N2Oo and N3Oo(o=0—3)could be detected by using the QPEOTMS ***,these findings will potentially contribute to the clean and efficient utilization of oily sludge.

关键词： oily sludge petroleum hydrocarbon ultrasonic extraction heteroatom-containing compounds

CeO_(x)-supported monodispersed MoO_(3) clusters for high-efficiency electrochemical nitrogen reduction under ambient condition

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Journal of Energy Chemistry 2021年第5期30卷 186-192页

作者： Jie Liu guanghua wang Shiyuan Zhou Sangui Liu Gen Li Hong-Gang Liao Shi-Gang Sun State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina

Developing efficient and low-cost electrocatalysts is essential for the electroreduction of N_(2) to NH_(3).Here,highly monodispersed MoO_(3) clusters loaded on a coral-like CeO_(x)compound with abundant oxygen vacancies are successfully prepared by an impregnation-reduction *** MoO_(3) clusters with small sizes of 2.6±0.5 nm are induced and anchored by the oxygen vacancies of CeO_(x),resulting in excellent nitrogen reduction reaction(NRR)***,the synergistic effects between MoO_(3) and CeO_(x)lead to a further improvement of the electrochemical *** as-prepared MoO_(3)-CeO_(x)catalyst shows an NH_(3) yield rate of 32.2 μg h^(-1) mg^(-1) cat and a faradaic efficiency of 7.04%at-0.75 V(*** hydrogen electrode)in 0.01 M Dulbecco’s Phosphate Buffered ***,it displays decent electrochemical stability over 30,000 ***,the electrochemical NRR mechanism for MoO_(3)-CeO_(x)is investigated by in-situ Fourier transform infrared spectroscopy.N-H stretching,H-N-H bending,and N-N stretching are detected during the reaction,suggesting that an associative pathway is *** work provides an approach to designing and synthesizing potential electrocatalysts for NRR.

关键词： Electrochemical nitrogen reduction reaction Mo-based catalysts Monodispersed clusters Oxygen vacancies

Characteristics of size distributions and sources of water-soluble ions in Lhasa during monsoon and non-monsoon seasons

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Journal of Environmental Sciences 2019年第8期31卷 155-168页

作者： Nannan Wei Zhiyou Xu Junwen Liu guanghua wang Wei Liu Deqing Zhuoga Detao Xiao Jian Yao School of Nuclear Science and Technology University of South China Department of Nuclear Reactor Engineering Shanghai Institute of Applied Physics Chinese Academy of Sciences Institute for Environmental and Climate Research Jinan University Meteorological Service Center of Tibet Autonomous Region Meteorological Bureau

To understand the physical and chemical characteristics, particle size distribution and sources of size-separated aerosols in Lhasa, which is located on the Tibetan Plateau(TP), six sizes of aerosol samples were collected in Lhasa in 2014. Ca^(2+), NH_4^+, NO_3^-,SO_4^(2-)and Cl-were the dominant ions. The ratio of cation equivalents(CE) to anion equivalents(AE) for each particle size segment indicated that the atmospheric aerosols in Lhasa were alkaline. SO_4^(2-)and NO_3^-could be neutralized by Ca^(2+), but could not be neutralized by NH_4^+, according to the [NH_4^+]/[NO_3^-+ SO_4^(2-)] and [Ca^(2+)]/[NO_3^-+ SO_4^(2-)] ratios. Mobile sources were dominant in PM_(0.95-1.5),PM_(1.5-3) and PM_(3-7.2), while stationary sources were dominant in the other three size fractions according to the [NO_3^-]/[SO_4^(2-)] ratios. The particle size distribution of all watersoluble ions during monsoon and non-monsoon periods was characterized by a bimodal distribution due to the different sources and formation mechanisms, and it was revealed that different ions had different sources in different seasons and different particle size segments by combining particle size distribution with correlation analysis. Source analysis of aerosols in Lhasa was performed using the Principal component analysis(PCA) for the first time, which revealed that combustion sources, motor vehicle exhaust, photochemical reaction sources and various types of dust were the main sources of Lhasa ***, Lhasa's air quality was also affected by long-distance transmission, expressed as pollutants from South Asia and West Asia, which were transmitted to Lhasa according to backward trajectory analysis.

关键词： Atmospheric aerosols Water-soluble ions(WSIs) Size distribution Principal component analysis(PCA) Backward trajectory

Narrow distribution of cyanophage psbA genes observed in two paddy waters of Northeast China by an incubation experiment

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Virologica Sinica 2016年第2期31卷 188-191页

作者： Xinzhen wang Ruiyong Jing Junjie Liu Zhenhua Yu Jian Jin Xiaobing Liu Xiaojuan wang guanghua wang Key Laboratory of Mollisols Agroecology Northeast Institute of Geography and Agroecology Chinese Academy of SciencesHarbin 150081 China University of Chinese Academy of Sciences Beijing 100049China College of Life and Sci-technology Heilongjiang BaYi Agricultural University Daqing 163319 China Centre for AgriBioscience La Trobe University Melbourne Campus Bundoora Vic 3086 Australia

Dear Editor,Cyanophages are viruses that infect *** play an important role in shaping the genetic and functional diversity of themselves and their hosts through genetic exchange and shuffling（Lindell et al.,2005;Sing... 详细信息

关键词： incubation paddy waters capable Northeast cyanobacteria phage shaping contained themselves

Adhering to the Chinese Modernization Path of Harmony Between Humanity and Nature

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Qiu Shi 2023年第4期15卷 32-42页

作者： wang guanghua CPC Leadership Group

The 20th National Congress of the Communist Party of China (CPC) held in October 2022 expounded the theory of Chinese modernization, emphasizing the need to advance the rejuvenation of the Chinese nation on all fronts via a Chinese path to modernization and pointing out that Chinese modernization is the modernization of harmony between humanity and nature. The congress also stressed the need to uphold and act on the principle that lucid waters and lush mountains are invaluable assets and to maintain harmony between humanity and nature when planning development. This represents an important innovation in modernization theory, the latest theoretical innovation of Xi Jinping Thought on Ecological Conservation, and a practical requirement for advancing ecological conservation.

关键词： harmony Harmony modernization

Properties of Magnetite Nanoparticles Produced by Magnetotactic Bacteria

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Journal of Wuhan University of Technology(Materials Science) 2014年第6期29卷 1317-1322页

作者：李文兵 YU Longjiang ZHOU Pengpeng wang guanghua XU Binfu CHENG Zhengzai 徐卫国 School of Chemical Engineering and Technology Wuhan University of Science and Technology College of Life Science & Technology Huazhong University of Science & Technology College of Physics &Technology Wuhan University Department of Orthopaedics Tongji Hospital Affilated to Tongji Medical College Huazhong University of Science and Technology

The magnetic nanoparticles（magnetite） were prepared through the fermentation of the Magnetospirillum strain WM-1 newly isolated by our group. The samples were characterized by TEM, SAED, XRD, rock magnetic analysis, and Mossbauer spectroscopy. TEM and SAED measurements showed that the magnetosomes formed by strain WM-1 were single crystallites of high perfection with a cubic spinel structure of magnetite. X-ray measurements also fitted very well with standard Fe3O4 reflections with an inverse spinel structure of the magnetite core. The size of crystal as calculated by the Debye-Scherrer’s equation was approximately 55 nm. Rock magnetic analysis showed WM-1 synthesized single-domain magnetite magnetosomes, which were arranged in the form of linear chain. The high delta ratio（（δFC / δZFC = 4） supported the criteria of Moskowitz test that there were intact magnetosomes chains in cells. The Verwey transition occurred at 105 K that closed to stoochiometric magnetite in composition. These observations provided useful insights into the biomineralization of magnetosomes and properties of M. WM-1 and potential application of biogenic magnetite in biomaterials and biomagnetism.

关键词： biogenic magnetite magnetotactic bacteria property magnetosome biomineralization