Since 2001, China kept its position of the largest producing country of rare earth rnagnets in the world and worked on further in the global market. China exported 7,709 tons of rare earth magnets and earned foreign c...Since 2001, China kept its position of the largest producing country of rare earth rnagnets in the world and worked on further in the global market. China exported 7,709 tons of rare earth magnets and earned foreign currency ofUSS 214 million in 2004, increasing 37.2% and 33.0% over the same period of 2003 respectivety. In 2005, China exported 8.756 tons of RE magnets and earned foreign currency of USSZ39 million, up 13.9% and 11.4% over 2004 respectively.展开更多
The 16th National Congress of the Communist Party of China was held inNovember 2002. In the five years since then, great changes took place in Chinesepower industry. Power institutional reform was deepened; the constr...The 16th National Congress of the Communist Party of China was held inNovember 2002. In the five years since then, great changes took place in Chinesepower industry. Power institutional reform was deepened; the construction ofboth power sources and power grids was speeded up; the tense situation of powersupply and demand was alleviated; the safety and reliability of power productionwere improved; the management on power tariff was standardized; environmentalprotection and energy conservation achieved good results; researches on newtechnologies made new achievements; and the operation of enterprises was im-proved.展开更多
Officially launched in August 2014,the journal Confucian Academy(Chinese Thought and Culture Review)[ISSN 2095–8536,CN 52–5035/C]is a leading Chinese–English bilingual scholarly journal dedicated to traditional Chi...Officially launched in August 2014,the journal Confucian Academy(Chinese Thought and Culture Review)[ISSN 2095–8536,CN 52–5035/C]is a leading Chinese–English bilingual scholarly journal dedicated to traditional Chinese thought and culture in prompting conversations among world civilizations.展开更多
The increasing Chinese online reviews contain rich product demand information,especially for search products.This study suggests a product feature extraction model from online reviews based on multi-feature fusion nam...The increasing Chinese online reviews contain rich product demand information,especially for search products.This study suggests a product feature extraction model from online reviews based on multi-feature fusion named PFEMF(products features extraction based on multi-feature fusion)model.Combining sentence and word characteristics of Chinese online reviews,the model explores the lexical features,frequency features,span features,and semantic similarity features of words.And then,they are fused to identify the features that customers are concerned about most by sequential relationship analysis.The identified product feature provides direction for product innovation and facilitates the product selection for customers.Finally,the study takes iPad Air as an example to prove this model.The results show that the extraction performance of the PFEMF model is superior to the traditional term frequency-inverse document frequency(tf-idf)algorithm,word span algorithm,and semantic similarity algorithm.展开更多
The Chinese medical ethics committee and the ethical review system have made the following achievements: (1) enabled the institutionalization of medical ethics, (2) carried out the ethics review of Chinese medici...The Chinese medical ethics committee and the ethical review system have made the following achievements: (1) enabled the institutionalization of medical ethics, (2) carried out the ethics review of Chinese medicine (CM) and integrative medicine extensively, (3) trained a large number of ethical professionals, (4) supported and protected the interests of patients and subjects, and (5) ensured the correct direction of biological research and provided ethical defense for the publication of its results. However, at the same time, they are also faced with some new problems and difficulties that need to be resolved in the following ways: (1) to refine the relevant rules of ethical review, (2) to develop the relevant standards of the CM and integrative medicine ethical review, (3) to enhance the independence and authority of ethics committee, (4) to emphasize innovation and to discover and solve new problems, and (5) to increase international exchanges and improve relevant research.展开更多
Objective To assess the effectiveness and safety of traditional Chinese medicine(TCM)for women with diminished ovarian reserve(DOR).Methods A literature search was conducted in eight electronic databases for rando...Objective To assess the effectiveness and safety of traditional Chinese medicine(TCM)for women with diminished ovarian reserve(DOR).Methods A literature search was conducted in eight electronic databases for randomized controlled trials.Results Seventeen randomized controlled trials involving 1174 patients were included.Meta-analysis indicated that TCM was superior to Western medicine(WM)in reducing basal serum FSH level[MD=-1.70,95%CI(-2.63,-0.77);P=0.0004]and FSH/LH(MD=-0.43,95%CI[-0.56,-0.30];P=0.0001),and the effect was more obvious two months after the last treatment(MD=-4.60,95%CI[-6.26,-2.90],P〈0.000 01 and MD=-0.56,95%CI[-0.85,-0.28],P=0.0001),and increasing antral follicle count(AFC)(MD=0.44,95%CI[0.04-0.83];P=0.03).The review also revealed the positive role of CMM as an adjuvant to IVF-ET in improving pregnancy rate(PR=1.75,95%CI[1.25,2.46];P=0.001).Conclusion TCM,with its unique way of replenishing the kidney,may provide an effective and safe alternative therapy to patients with DOR.展开更多
Traditional Chinese patent medicines (TCPMs) are widely used for treatment of chronic hepatitis B (CHB) in China. To estimate the overall effectiveness of TCPMs for CHB, we performed a systematic review of clinical re...Traditional Chinese patent medicines (TCPMs) are widely used for treatment of chronic hepatitis B (CHB) in China. To estimate the overall effectiveness of TCPMs for CHB, we performed a systematic review of clinical reports designed as randomized controlled trials (RCTs). One hundred and thirty-eight available RCTs and quasi-RCTs on 62 TCPMs, involving 16,393 patients, were included. The methodological quality of these trials was generally "poor". Few trials (6.52%) reported the methods of randomization correctly. Another common problem was the lack of allocation concealment, proper blinding, and the reporting of lost cases and dropouts. Forty-two trials (30.43%) on 27 TCPMs reported some anti-viral effect of TCPMs. Others reported beneficial aspects, including improvements of liver function (79.71% of the studies), liver fibrosis (29.99%), and CHB symptoms (92.75%). Forty-one articles (29.71%) reported mild adverse events with TCPMs but these occurred infrequently. In summary, the outcome of the report on currently registered TCPMs may be biased due to poor methodology. The data from these trials, therefore, is too weak to use in forming a recommendation for treatment of CHB. Nevertheless, five drugs (Dan Shen agents, Da Huang Zhe Chong pill/capsule, Shuang Hu Qing Gan granule, Fu Zheng Hua Yu granule and Cao Xian Yi Gan capsule) appear to be more effective than the other TCPMs.展开更多
Objectives: To evaluate the efficacy and safety of Chinese herbal medicine Xingnaojing Injection(醒脑静注射液) for newborns with hypoxic ischemic encephalopathy(HIE). Methods: Literature was identified by search...Objectives: To evaluate the efficacy and safety of Chinese herbal medicine Xingnaojing Injection(醒脑静注射液) for newborns with hypoxic ischemic encephalopathy(HIE). Methods: Literature was identified by searching the Pub Med, EMBASE, Cochrane Library, Cochrane Central, and four Chinese literature databases from the establishment of database to October in 2013. Relevant reference lists were also screened. Two reviewers independently evaluated the methodological quality of included studies. We also conducted the meta-analysis. Results: Thirteen trials involving 1,169 patients were included. There was no trial reported death or disability at the end of follow-up period. Meta-analysis of 4 trials(n=371) showed that there was no significant difference in the reduction of mortality [risk ratios(RR)=0.48, 95% confidence intervals(CI, 0.21, 1.13), P=0.09] between the Xingnaojing and control groups. Meta-analysis of 5 trials(n=359) showed that there was significant difference in reducing the major neurodevelopmental disability [RR=0.36, 95% CI(0.19, 0.66), P=0.001]. Meta-analysis of 6 trials(n=447) showed that there was a significant difference in the author self-defined symptom improvement [RR=1.25, 95% CI(1.14, 1.37), P〈0.01]. No fatal side-effects were reported. Conclusion: Based on the limited evidence, the routine use of Xingnaojing Injection for treatment of HIE in newborns is not recommended. Further well-conducted trials are justified.展开更多
With the introduction and development of evidence-based medicine in China, it has been spread rapidly in the area of integrative medicine(IM) and has become a new unique discipline. During almost 20 years, as one of...With the introduction and development of evidence-based medicine in China, it has been spread rapidly in the area of integrative medicine(IM) and has become a new unique discipline. During almost 20 years, as one of the most important parts of evidence-based IM, systematic review(SR)/meta-analysis(MA) of IM have shown a good development momentum in the aspects of quantity, depth, breadth and influence, but also face the harsh situation of the uncontrolled quantity and quality, especially for SRs in Chinese. Therefore, how to supervise and standardize this area effectively becomes a problem to be solved. Based on the experience both at home and abroad, the authors put forward several kinds of solutions for laying the foundation for further development such as promoting the registration system of SR/MA of IM, effectively setting up the regulatory platform of quality and quantity, launching professional training for SR/MA reviewers, formingqualification registration, developing the data transfer and sharing platform to realize the transparency of evidence process.展开更多
OBJECTIVE:To assess the effect of case-based learning(CBL)in the education of Traditional Chinese Medicine(TCM).METHODS:The studies concerning TCM courses designed with CBL were included by searching the databases of ...OBJECTIVE:To assess the effect of case-based learning(CBL)in the education of Traditional Chinese Medicine(TCM).METHODS:The studies concerning TCM courses designed with CBL were included by searching the databases of EBSCO,Pubmed,Science Citation Index,China National Knowledge Infrastructure,Chongqing VIP database.The valid data was extracted in accordance with the included criteria.The quality of the studies was assessed with Gemma Flores-Masteo.RESULTS:A total of 22 articles were retrieved that met the selection criteria:one was of high quality;two were of low quality;the rest were categorized as moderate quality.The majority of the studiesdemonstrated the better effect produced by CBL,while a few studies showed no difference,compared with the didactic format.All included studies confirmed the favorable effect on learners'attitude,skills and ability.CONCLUSION:CBL showed the desirable results in achieving the goal of learning.Compared to didactic approach,it played a more active role in promoting students'competency.Since the quality of the articles on which the study was based was not so high,the findings still need further research to become substantiated.展开更多
Considering the diversities and ambiguities of opinion expressions in Chinese online product reviews,normal sentiment analysis technologies have exposed their inadequateness in both classification accuracy and identif...Considering the diversities and ambiguities of opinion expressions in Chinese online product reviews,normal sentiment analysis technologies have exposed their inadequateness in both classification accuracy and identifying effectiveness.We propose a novel approach which can easily identify product features and corresponding opinions by building a domain-specific affective ontology and thus mapping comment sentences to the objects defined in the affective ontology.Ontology is created automatically by processing the online reviews;both product features and affective words are presented as nodes which are connected to each other by their semantic relationship.Furthermore,in order to increase the accuracy,we introduce a dynamic polarity detection technique for affective words whose sentimental tendencies are dependent on particular contexts.The experimental results clearly demonstrate the performance improvement of our approach compared with others in real world online product reviews for classification tests.展开更多
Nowadays,the Internet has penetrated into all aspects of people's lives.A large number of online customer reviews have been accumulated in several product forums,which are valuable resources to be analyzed.However...Nowadays,the Internet has penetrated into all aspects of people's lives.A large number of online customer reviews have been accumulated in several product forums,which are valuable resources to be analyzed.However,these customer reviews are unstructured textual data,in which a lot of ambiguities exist,so analyzing them is a challenging task.At present,the effective deep semantic or fine-grained analysis of customer reviews is rare in the existing literature,and the analysis quality of most studies is also low.Therefore,in this paper a fine-grained opinion mining method is introduced to extract the detailed semantic information of opinions from multiple perspectives and aspects from Chinese automobile reviews.The conditional random field (CRF) model is used in this method,in which semantic roles are divided into two groups.One group relates to the objects being reviewed,which includes the roles of manufacturer,the brand,the type,and the aspects of cars.The other group of semantic roles is about the opinions of the objects,which includes the sentiment description,the aspect value,the conditions of opinions and the sentiment tendency.The overall framework of the method includes three major steps.The first step distinguishes the relevant sentences with the irrelevant sentences in the reviews.At the second step the relevant sentences are further classified into different aspects.At the third step fine-grained semantic roles are extracted from sentences of each aspect.The data used in the training process is manually annotated in fine granularity of semantic roles.The features used in this CRF model include basic word features,part-of-speech (POS) features,position features and dependency syntactic features.Different combinations of these features are investigated.Experimental results are analyzed and future directions are discussed.展开更多
Medicinal plants are important source for Oriental and Western medicines.There are more than 500 herbs commonly used today in China,in which near 30% of them are seed medicines and over
1. Production and Sales ltard Reaching the Target According to the statistics of the State Ad-ministration of Machinery Industry (SAMI), the accumulated car production Jan. to Oct., 1998 was 418,500 units, of which 40...1. Production and Sales ltard Reaching the Target According to the statistics of the State Ad-ministration of Machinery Industry (SAMI), the accumulated car production Jan. to Oct., 1998 was 418,500 units, of which 407,500 u- nits were sold. October, the traditional brisk month, did not witness a flourishing sale as usu-展开更多
2010 is a crucial year for achieving all the targets of the 11th Five-Year Plan (2006-2010) and laying a solid development foundation for the 12th Five-Year Plan (2011-2015). The following is a review of some major ta...2010 is a crucial year for achieving all the targets of the 11th Five-Year Plan (2006-2010) and laying a solid development foundation for the 12th Five-Year Plan (2011-2015). The following is a review of some major targets in Chinese textile industry during the period 2006-2010:展开更多
OBJECTIVE:To evaluate the efficacy and safety of Xuefuzhuyu decoction for hyperlipidemia.METHODS:Randomized clinical trials on hyperlipidemia treated by Xuefuzhuyu decoction,either alone or with Western Medicine,were ...OBJECTIVE:To evaluate the efficacy and safety of Xuefuzhuyu decoction for hyperlipidemia.METHODS:Randomized clinical trials on hyperlipidemia treated by Xuefuzhuyu decoction,either alone or with Western Medicine,were searched in electronic databases.Databases searched were:MEDLINE,Allied and Complementary Medicine Database,EMBASE,The Cochrane Library 2013(Issue4),China National Knowledge Infrastructure Database,Chinese Biomedical Literature Database,and Wanfang Database up to 2 May,2013.Study selection,data extraction,quality assessment,and data analysis were conducted according to the Cochranestandards.RESULTS:Six randomized clinical trials involving748 patients(373 patients in the treatment group,375 patients in the control group)were included in the analysis.The studies were of low methodological quality.Meta-analysis indicated that the effect of Xuefuzhuyu decoction on hyperlipidemia was better than that in the control group[n=748,OR=5.07,95%CI(3.40,7.58),P<0.01].Weighted mean differencesin total cholesterol,low-densitylipoprotein cholesterol,triglycerides,and high-density lipoprotein cholesterol were﹣0.79,﹣0.74,﹣0.44,0.16,respectively,and Meta-analysis revealed that the treatment group was better than the control group with 95%CI(﹣1.21,﹣0.36),(﹣0.94,﹣0.55),(﹣0.77,﹣0.11),(0.04,0.27),respectively(all P<0.05).Some adverse events in evaluated studies wererecorded.CONCLUSION:Xuefuzhuyu decoction may be effective for treating hyperlipidemia.The studies we analyzed were of low methodological quality,which indicates that the above findings should be considered cautiously.Therefore,more strictly designed large-scale randomized clinical trials are needed to evaluate the efficacy of Xuefuzhuyu decoction in hyperlipidemia.展开更多
文摘Since 2001, China kept its position of the largest producing country of rare earth rnagnets in the world and worked on further in the global market. China exported 7,709 tons of rare earth magnets and earned foreign currency ofUSS 214 million in 2004, increasing 37.2% and 33.0% over the same period of 2003 respectivety. In 2005, China exported 8.756 tons of RE magnets and earned foreign currency of USSZ39 million, up 13.9% and 11.4% over 2004 respectively.
文摘The 16th National Congress of the Communist Party of China was held inNovember 2002. In the five years since then, great changes took place in Chinesepower industry. Power institutional reform was deepened; the construction ofboth power sources and power grids was speeded up; the tense situation of powersupply and demand was alleviated; the safety and reliability of power productionwere improved; the management on power tariff was standardized; environmentalprotection and energy conservation achieved good results; researches on newtechnologies made new achievements; and the operation of enterprises was im-proved.
文摘Officially launched in August 2014,the journal Confucian Academy(Chinese Thought and Culture Review)[ISSN 2095–8536,CN 52–5035/C]is a leading Chinese–English bilingual scholarly journal dedicated to traditional Chinese thought and culture in prompting conversations among world civilizations.
基金This work was supported by the National Planning Office of Philosophy and Social Science,China(Grant No.:20BGL044)the Fundamental Research Funds for the Central Universities,China(Grant No.:N2106012).
文摘The increasing Chinese online reviews contain rich product demand information,especially for search products.This study suggests a product feature extraction model from online reviews based on multi-feature fusion named PFEMF(products features extraction based on multi-feature fusion)model.Combining sentence and word characteristics of Chinese online reviews,the model explores the lexical features,frequency features,span features,and semantic similarity features of words.And then,they are fused to identify the features that customers are concerned about most by sequential relationship analysis.The identified product feature provides direction for product innovation and facilitates the product selection for customers.Finally,the study takes iPad Air as an example to prove this model.The results show that the extraction performance of the PFEMF model is superior to the traditional term frequency-inverse document frequency(tf-idf)algorithm,word span algorithm,and semantic similarity algorithm.
文摘The Chinese medical ethics committee and the ethical review system have made the following achievements: (1) enabled the institutionalization of medical ethics, (2) carried out the ethics review of Chinese medicine (CM) and integrative medicine extensively, (3) trained a large number of ethical professionals, (4) supported and protected the interests of patients and subjects, and (5) ensured the correct direction of biological research and provided ethical defense for the publication of its results. However, at the same time, they are also faced with some new problems and difficulties that need to be resolved in the following ways: (1) to refine the relevant rules of ethical review, (2) to develop the relevant standards of the CM and integrative medicine ethical review, (3) to enhance the independence and authority of ethics committee, (4) to emphasize innovation and to discover and solve new problems, and (5) to increase international exchanges and improve relevant research.
基金National Natural Science Foundation of China(81273791)
文摘Objective To assess the effectiveness and safety of traditional Chinese medicine(TCM)for women with diminished ovarian reserve(DOR).Methods A literature search was conducted in eight electronic databases for randomized controlled trials.Results Seventeen randomized controlled trials involving 1174 patients were included.Meta-analysis indicated that TCM was superior to Western medicine(WM)in reducing basal serum FSH level[MD=-1.70,95%CI(-2.63,-0.77);P=0.0004]and FSH/LH(MD=-0.43,95%CI[-0.56,-0.30];P=0.0001),and the effect was more obvious two months after the last treatment(MD=-4.60,95%CI[-6.26,-2.90],P〈0.000 01 and MD=-0.56,95%CI[-0.85,-0.28],P=0.0001),and increasing antral follicle count(AFC)(MD=0.44,95%CI[0.04-0.83];P=0.03).The review also revealed the positive role of CMM as an adjuvant to IVF-ET in improving pregnancy rate(PR=1.75,95%CI[1.25,2.46];P=0.001).Conclusion TCM,with its unique way of replenishing the kidney,may provide an effective and safe alternative therapy to patients with DOR.
基金supported by Hunan Natural Science Foundation (09JJ3065)
文摘Traditional Chinese patent medicines (TCPMs) are widely used for treatment of chronic hepatitis B (CHB) in China. To estimate the overall effectiveness of TCPMs for CHB, we performed a systematic review of clinical reports designed as randomized controlled trials (RCTs). One hundred and thirty-eight available RCTs and quasi-RCTs on 62 TCPMs, involving 16,393 patients, were included. The methodological quality of these trials was generally "poor". Few trials (6.52%) reported the methods of randomization correctly. Another common problem was the lack of allocation concealment, proper blinding, and the reporting of lost cases and dropouts. Forty-two trials (30.43%) on 27 TCPMs reported some anti-viral effect of TCPMs. Others reported beneficial aspects, including improvements of liver function (79.71% of the studies), liver fibrosis (29.99%), and CHB symptoms (92.75%). Forty-one articles (29.71%) reported mild adverse events with TCPMs but these occurred infrequently. In summary, the outcome of the report on currently registered TCPMs may be biased due to poor methodology. The data from these trials, therefore, is too weak to use in forming a recommendation for treatment of CHB. Nevertheless, five drugs (Dan Shen agents, Da Huang Zhe Chong pill/capsule, Shuang Hu Qing Gan granule, Fu Zheng Hua Yu granule and Cao Xian Yi Gan capsule) appear to be more effective than the other TCPMs.
基金Supported by the National Natural Science Foundation of China(No.81373381)
文摘Objectives: To evaluate the efficacy and safety of Chinese herbal medicine Xingnaojing Injection(醒脑静注射液) for newborns with hypoxic ischemic encephalopathy(HIE). Methods: Literature was identified by searching the Pub Med, EMBASE, Cochrane Library, Cochrane Central, and four Chinese literature databases from the establishment of database to October in 2013. Relevant reference lists were also screened. Two reviewers independently evaluated the methodological quality of included studies. We also conducted the meta-analysis. Results: Thirteen trials involving 1,169 patients were included. There was no trial reported death or disability at the end of follow-up period. Meta-analysis of 4 trials(n=371) showed that there was no significant difference in the reduction of mortality [risk ratios(RR)=0.48, 95% confidence intervals(CI, 0.21, 1.13), P=0.09] between the Xingnaojing and control groups. Meta-analysis of 5 trials(n=359) showed that there was significant difference in reducing the major neurodevelopmental disability [RR=0.36, 95% CI(0.19, 0.66), P=0.001]. Meta-analysis of 6 trials(n=447) showed that there was a significant difference in the author self-defined symptom improvement [RR=1.25, 95% CI(1.14, 1.37), P〈0.01]. No fatal side-effects were reported. Conclusion: Based on the limited evidence, the routine use of Xingnaojing Injection for treatment of HIE in newborns is not recommended. Further well-conducted trials are justified.
基金Supported by Funding of Major Supporting Departments(KFKFC) of Rehabilitation Medicine,Wuxi People's Hospital Affiliated to Nanjing Medical Universitythe Second Batch of National "Ten Thousand Talents Plan" of Scientific and Technological Innovation Leading Talents(No.W02020052)
文摘With the introduction and development of evidence-based medicine in China, it has been spread rapidly in the area of integrative medicine(IM) and has become a new unique discipline. During almost 20 years, as one of the most important parts of evidence-based IM, systematic review(SR)/meta-analysis(MA) of IM have shown a good development momentum in the aspects of quantity, depth, breadth and influence, but also face the harsh situation of the uncontrolled quantity and quality, especially for SRs in Chinese. Therefore, how to supervise and standardize this area effectively becomes a problem to be solved. Based on the experience both at home and abroad, the authors put forward several kinds of solutions for laying the foundation for further development such as promoting the registration system of SR/MA of IM, effectively setting up the regulatory platform of quality and quantity, launching professional training for SR/MA reviewers, formingqualification registration, developing the data transfer and sharing platform to realize the transparency of evidence process.
基金Supported by "Twelve-five" Scientific Research Study on Education from Chinese Academy of Higher Education(No.11YB032)by Scientific Research Study on Education from Sichuan Academy of Higher Education(No.11SC-007)by Key research project on teaching reform from Chengdu University of Traditional Chinese Medicine(No.JGZD201001)
文摘OBJECTIVE:To assess the effect of case-based learning(CBL)in the education of Traditional Chinese Medicine(TCM).METHODS:The studies concerning TCM courses designed with CBL were included by searching the databases of EBSCO,Pubmed,Science Citation Index,China National Knowledge Infrastructure,Chongqing VIP database.The valid data was extracted in accordance with the included criteria.The quality of the studies was assessed with Gemma Flores-Masteo.RESULTS:A total of 22 articles were retrieved that met the selection criteria:one was of high quality;two were of low quality;the rest were categorized as moderate quality.The majority of the studiesdemonstrated the better effect produced by CBL,while a few studies showed no difference,compared with the didactic format.All included studies confirmed the favorable effect on learners'attitude,skills and ability.CONCLUSION:CBL showed the desirable results in achieving the goal of learning.Compared to didactic approach,it played a more active role in promoting students'competency.Since the quality of the articles on which the study was based was not so high,the findings still need further research to become substantiated.
基金the National Natural Science Foundation of China(Nos.61303105 and 61402304)the Humanity & Social Science General Project of Ministry of Education(No.14YJAZH046)+2 种基金the Beijing Natural Science Foundation(No.4154065)the Beijing Educational Committee Science and Technology Development Plan(No.KM201410028017)the Academic Degree Graduate Courses Group Projects
文摘Considering the diversities and ambiguities of opinion expressions in Chinese online product reviews,normal sentiment analysis technologies have exposed their inadequateness in both classification accuracy and identifying effectiveness.We propose a novel approach which can easily identify product features and corresponding opinions by building a domain-specific affective ontology and thus mapping comment sentences to the objects defined in the affective ontology.Ontology is created automatically by processing the online reviews;both product features and affective words are presented as nodes which are connected to each other by their semantic relationship.Furthermore,in order to increase the accuracy,we introduce a dynamic polarity detection technique for affective words whose sentimental tendencies are dependent on particular contexts.The experimental results clearly demonstrate the performance improvement of our approach compared with others in real world online product reviews for classification tests.
基金the National Natural Science Foundation of China(No.61375053)the Project of Shanghai University of Finance and Economics(Nos.2018110565 and 2016110743)。
文摘Nowadays,the Internet has penetrated into all aspects of people's lives.A large number of online customer reviews have been accumulated in several product forums,which are valuable resources to be analyzed.However,these customer reviews are unstructured textual data,in which a lot of ambiguities exist,so analyzing them is a challenging task.At present,the effective deep semantic or fine-grained analysis of customer reviews is rare in the existing literature,and the analysis quality of most studies is also low.Therefore,in this paper a fine-grained opinion mining method is introduced to extract the detailed semantic information of opinions from multiple perspectives and aspects from Chinese automobile reviews.The conditional random field (CRF) model is used in this method,in which semantic roles are divided into two groups.One group relates to the objects being reviewed,which includes the roles of manufacturer,the brand,the type,and the aspects of cars.The other group of semantic roles is about the opinions of the objects,which includes the sentiment description,the aspect value,the conditions of opinions and the sentiment tendency.The overall framework of the method includes three major steps.The first step distinguishes the relevant sentences with the irrelevant sentences in the reviews.At the second step the relevant sentences are further classified into different aspects.At the third step fine-grained semantic roles are extracted from sentences of each aspect.The data used in the training process is manually annotated in fine granularity of semantic roles.The features used in this CRF model include basic word features,part-of-speech (POS) features,position features and dependency syntactic features.Different combinations of these features are investigated.Experimental results are analyzed and future directions are discussed.
文摘Medicinal plants are important source for Oriental and Western medicines.There are more than 500 herbs commonly used today in China,in which near 30% of them are seed medicines and over
文摘1. Production and Sales ltard Reaching the Target According to the statistics of the State Ad-ministration of Machinery Industry (SAMI), the accumulated car production Jan. to Oct., 1998 was 418,500 units, of which 407,500 u- nits were sold. October, the traditional brisk month, did not witness a flourishing sale as usu-
文摘2010 is a crucial year for achieving all the targets of the 11th Five-Year Plan (2006-2010) and laying a solid development foundation for the 12th Five-Year Plan (2011-2015). The following is a review of some major targets in Chinese textile industry during the period 2006-2010:
基金Supported by National Natural Science Foundation of China(the Inflammatory Mechanism of Renal Damage in Hyperlipidemia Rat After Myocardial Ischemia and the Intevention of Activating Blood and Dissolving Stasis.No.81072924)
文摘OBJECTIVE:To evaluate the efficacy and safety of Xuefuzhuyu decoction for hyperlipidemia.METHODS:Randomized clinical trials on hyperlipidemia treated by Xuefuzhuyu decoction,either alone or with Western Medicine,were searched in electronic databases.Databases searched were:MEDLINE,Allied and Complementary Medicine Database,EMBASE,The Cochrane Library 2013(Issue4),China National Knowledge Infrastructure Database,Chinese Biomedical Literature Database,and Wanfang Database up to 2 May,2013.Study selection,data extraction,quality assessment,and data analysis were conducted according to the Cochranestandards.RESULTS:Six randomized clinical trials involving748 patients(373 patients in the treatment group,375 patients in the control group)were included in the analysis.The studies were of low methodological quality.Meta-analysis indicated that the effect of Xuefuzhuyu decoction on hyperlipidemia was better than that in the control group[n=748,OR=5.07,95%CI(3.40,7.58),P<0.01].Weighted mean differencesin total cholesterol,low-densitylipoprotein cholesterol,triglycerides,and high-density lipoprotein cholesterol were﹣0.79,﹣0.74,﹣0.44,0.16,respectively,and Meta-analysis revealed that the treatment group was better than the control group with 95%CI(﹣1.21,﹣0.36),(﹣0.94,﹣0.55),(﹣0.77,﹣0.11),(0.04,0.27),respectively(all P<0.05).Some adverse events in evaluated studies wererecorded.CONCLUSION:Xuefuzhuyu decoction may be effective for treating hyperlipidemia.The studies we analyzed were of low methodological quality,which indicates that the above findings should be considered cautiously.Therefore,more strictly designed large-scale randomized clinical trials are needed to evaluate the efficacy of Xuefuzhuyu decoction in hyperlipidemia.