http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Zhongjun Cui (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Integrated Model of Data Mining and Sentiment Analysis for Daily KOSPI Forecasting
Zhongjun Cui,Taeksoo Shin 한국경영학회 2015 한국경영학회 통합학술발표논문집 Vol.2015 No.08
Although stock price forecasting has been a traditional topic in the research domain of investment decision making, there have been many difficulties in forecasting stock price due to the unexpected rapid changes in stock prices. Recently, many researchers attempted to analyze sentiment in SNS data or news data to forecast stock price, but these researches have limitations that they used only one of sentiment data or KOSPI (Korea Composite Stock Price index) data in forecasting stock price. The aim of this paper is to propose new domain-specific sentiment dictionaries on stock price by using sentiment analysis, and acquire daily sentiment indices by analyzing the sentiment of news articles, and then use both of the sentiment data and KOSPI data together as input for data mining model for daily KOSPI forecasting, and finally improve the accuracy of forecasting the direction of KOSPI. TF-IDF weight was considered in building sentiment dictionaries and calculating daily sentiment indices by using domain-specific sentiment dictionaries. Our empirical result showed that in particular, a K-NN model with KOSPI and the sentiment data calculated by using both TF-IDF weights-based sentiment dictionary and the weights of news article itself in each news article data, had the accuracy of 68% and outperformed any other models in validation data.
-
Mahfuz, Shad,Song, Hui,Liu, Zhongjun,Liu, Xinyu,Diao, Zipeng,Ren, Guihong,Guo, Zhixin,Cui, Yan Asian Australasian Association of Animal Productio 2018 Animal Bioscience Vol.31 No.5
Objective: This experiment was conducted to evaluate the effects of golden needle mushroom (Flammulina velutipes) stem waste (FVW), on organic eggs production, calcium utilization, antibody response, serum immunoglobulin, and serum cytokine concentration at early phase of production in laying hens. Methods: A total 210, 19 weeks old aged ISA Brown layers were randomly assigned into 5 equal treatment groups, with 7 replications of 6 hens each. Dietary treatment included a standard basal diet as control; antibiotic (0.05% flavomycin); 2% FVW; 4% FVW; and 6% FVW. The experimental duration was 10 weeks. Results: There was no significant differences (p>0.05) on hen day egg production, egg weight, egg mass, feed intake, and feed conversion ratio (FCR) among experimental groups. Unmarketable eggs were significantly lower (p<0.05) both in 4% FVW and 6% FVW fed groups than control group. The calcium retention and calcium in egg shell deposition were significantly higher (p<0.05) in FVW inclusion groups than control and antibiotic groups. Antibody titers against Newcastle diseases were significantly higher (p<0.05) in 6% FVW fed group (except combined with 4% FVW at day 147) and infectious bronchitis were significantly higher (p<0.05) in FVW fed groups (except 2% FVW and 4% FVW at day 161) than control and antibiotic groups. Serum immunoglobulin sIgA was significantly higher (p<0.05) in all levels of FVW and IgG was significantly higher (p<0.05) in 4% FVW than control and antibiotic groups. Serum cytokine concentration interleukin-2 (IL-2) was significantly higher (p<0.05) in 6% FVW; IL-6 and tumor necrotic $factor-{\alpha}$ were significantly higher (p<0.05) both in 4% FVW and 6% FVW than control and antibiotic groups; IL-4 was significantly higher (p<0.05) in antibiotic, 2% FVW and 4% FVW fed groups than control. Conclusion: F. velutipes mushroom waste can be used as a novel substitute for antibiotic for organic egg production and sound health status in laying hens.
ScienceON연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
