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| 1 | News Keyword Extraction Algorithm Based on Semantic Clustering and Word Graph Model显示文摘The internet is an abundant source of news every day. Thus, efficient algorithms to extract keywords from the text are important to obtain information quickly. However, the precision and recall of mature keyword extraction algorithms need improvement. TextRank, which is derived from the PageRank algorithm, uses word graphs to spread the weight of words. The keyword weight propagation in Text Rank focuses only on word frequency. To improve the performance of the algorithm, we propose Semantic Clustering TextRank(SCTR), a semantic clustering news keyword extraction algorithm based on TextRank. Firstly, the word vectors generated by the Bidirectional Encoder Representation from Transformers(BERT) model are used to perform k-means clustering to represent semantic clustering. Then, the clustering results are used to construct a TextRank weight transfer probability matrix. Finally,iterative calculation of word graphs and extraction of keywords are performed. The test target of this experiment is a Chinese news library. The results of the experiment conducted on this text set show that the SCTR algorithm has greater precision, recall, and F1 value than the traditional TextRank and Term Frequency-Inverse Document Frequency(TF-IDF) algorithms. | Ao Xiong Derong Liu Hongkang Tian Zhengyuan Liu Peng Yu Michel Kadoch | 2021 | Tsinghua Science and Technology2021，26，6： | 7 |
| 2 | Research on the Production Efficiency andUtilizing Rate of Potassium Fertilizer for Rape in Yunnan Province 显示文摘 | Minglian FU Genze U Xiaoyan YUAN Derong CHENG Xuan ZHU Shengguang WEI Hongyan LJ Shi PENG Yuankuan LEI Bin HE Heming WEN Shaowei YU | 2011 | Agricultural Science & Technology2011，12，14： | 1 |
| 3 | Synthesis and characterization of novel red-emitting copolymers containing fluorene,diketopyrrolopyrrole,and phenothiazine units显示文摘A novel three-component copolymer (PFDP),derived from 9,9-dihexylfluorene,diketopyrrolopyrrole(DPP),and 10-octylphenothiazine,was synthesized through palladium-catalyzed Suzuki polycondensation in good yields. PFDP possessed moderate molecular weight and polydispersity,well-defined structure,and excellent thermal properties with an onset decomposition temperature at 357℃. PFDP in thin film exhibited red photoluminescence from DPP chromophore exclusively,with a peak at 602 nm. Electron-rich phenothiazine units sighificantly improved the injection and transport of holes by incorporating into polymer backbone. Light-emitting device was fabricated in the ITO/PEDOT:PSS/PVK/ polymer/Ba/Al configuration using PFDP as the emitting layer. The device based on PFDP showed red emission [CIE coordinate value (0.62,0.38)] that was close to the standard red (0.66,0.34). The results on electroluminescent performance revealed that PFDP may be a promising candidate for the red emitter with a maximum brightness of 259 cd/m2 and a maximum external quantum efficiency of 0.25%. | QIAO Zhi CAO DeRong LIU QiLin WENG JieNa HE ZhiCai HAN ShaoHu PENG JunBiao | 2009 | Science China Chemistry2009，52，12： | 1 |
| 4 | Photoluminescence Study of C_(70) Film Manufactured by Physical Jet Deposition显示文摘We have fabricated C_(70) film by physical jet deposition(PJD)technique and measured the absorption and photoluminescence(PL)spectra of this End C_(70) film.In comparison with the deposited C_(70) film in high vacuum,the absorption and integrated PL spectra are similar,but there is a big difference in the time-resolved PL.The C_(70) film made by PJD shows a very fast PL decay of less than 20ps which should result from the fast relaxation process of C_(70) molecule in the excited state S_(1) of this new kind film. | WANG Derong KE Guoqing QIAN Shixiong PENG Wenji YU Zhenxin | 1995 | Chinese Physics Letters1995，12，12： | 1 |
| 5 | Research Progress on Pathogenesis and Treatment of Type 2 Diabetes Mellitus by Traditional Chinese Medicine and Western Medicine显示文摘The prevalence rate of type 2 diabetes is increasing year by year,simple surgery and Western medicine treatment has limitations,doing damage to liver and kidney function,resulting in islet function damage,insulin resistance,poor curative effect and many adverse reactions.According to the difference of patients'health conditions,traditional Chinese medicine has certain advantages in the treatment of this disease by acupuncture,auricular point treatment and prescription based on syndrome differentiation,taking replenishing qi and nourishing yin,invigorating spleen and resolving dampness as the basic principle to enhance the functions of viscera such as lung,spleen and kidney,and to strengthen the body resistance to eliminate pathogenic factors.The curative effect is remarkable and the side effect is extremely low.Therefore,this paper makes a comparative analysis of the current situation of the research on the pathogenesis and treatment of the disease between traditional Chinese medicine and Western medicine,in order to provide new ideas for clinical and scientific researchers. | Mingzheng HUANG Shengbin CHEN Derong PENG Xiaomin DENG | 2022 | Medicinal Plant2022，13，1： | 0 |
| 6 | Cultivation of New Breeds of Guizhou Heima Goat显示文摘To culture new breeds of Guizhou Heima goat,establishing open nucleus breeding system in farm was adopted to develop comprehensive selection index and establish BLUP model to estimate breeding value,so as to guide assortative mating and selection improvement.The results showed that the body weights of yearling ram and ewe in nucleus herd were(29.77±5.51) kg and(25.18±5.67) kg,while those of adult ram and adult ewe were(40.08±7.73) kg and(34.90± 6.56) kg,respectively; the body weights of yearling ram and ewe in basic herd were(26.59±3.68) kg and(24.09±4.60) kg,while those of adult ram and adult ewe were(35.33±4.09) kg and(32.16±6.83) kg,respectively; the lambing rate was 152.33%; the slaughter rate was 48.50%,and the net meat rate was 38.94%.New breeds of Guizhou Heima goat had significantly improved production performance and breed uniformity,with stable genetic performance. | Song Derong Wang Jiafu Zhou Darong Peng Hua Yang Siwei Jiang Xingmei Wu Ruiru | 2014 | Animal Husbandry and Feed Science2014，6，1： | 0 |
| 7 | Research Progress of Gene Polymorphism of Guizhou Black Goat显示文摘Guizhou black goat is the second-largest breed of goat in Guizhou,an important part of ecosystem of karst region. Constructing cladogram of black goat and Guizhou local goat with molecular biological technique,we found some functional genes related to reproduction and growth of black goat,such as FSHR,LHβ,GDF9,MSTN,POU1F1,GFI1 B,etc. In view of the genetic relations between Guizhou black goat and other local goats,we reviewed the research status and progress of gene polymorphism of FSHR,LHβ,GDF9,MSTN,POU1F1,GFI1 B,and prospected the research field of molecular properties of the breed resource. | Song Derong Wang Qiwen Shen Xiaoyun Zhou Darong Peng Hua Yang Siwei | 2015 | Animal Husbandry and Feed Science2015，7，2： | 0 |
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