[目的/意义]情报信息的分散化分布规律是情报活动的基石,一些交叉性、前沿性政策类情报文本,呈现明显分散化特征,探寻此类情报信息量化研究方法,具有重要学术意义和现实紧迫性。[方法/过程]该文利用自然语言处理方法(Natural Language P...[目的/意义]情报信息的分散化分布规律是情报活动的基石,一些交叉性、前沿性政策类情报文本,呈现明显分散化特征,探寻此类情报信息量化研究方法,具有重要学术意义和现实紧迫性。[方法/过程]该文利用自然语言处理方法(Natural Language Processing,NLP),对旅游交通政策这一交叉领域的分散化政策演进进行量化分析。[结果/结论]研究验证了该方法对分散化政策类情报信息分析的适用性。结果表明:基于规则的命名实体识别对政策总量与结构的分析显示,发文总量逐年上升,不同时期政策结构有所差异。基于规则和统计模型的命名实体识别对政策制定主体的分析显示,政策颁发机构数量呈起伏上升趋势,多部门参与局面渐显。基于词性和句法分析的政策内容演进显示:“事故”始终是政策内容的语义核心词;语义聚焦主题词演进兼具继承性和发展性。展开更多
A comfortable environment in railway passenger coaches can be regarded as a resource for social consumption during the transport process. Railway passenger comfort benefits （RPCBs） can be regarded as a special gener...A comfortable environment in railway passenger coaches can be regarded as a resource for social consumption during the transport process. Railway passenger comfort benefits （RPCBs） can be regarded as a special generalized cost. In this paper, we select a series of objective and subjective indexes to formulate a quantitative method of calculating the RPCB with considering ticket fares. This method includes three steps： make the initial data dimensionless, calculate the weight of each index, and finally calculate the RPCBs. The proposed method was validated with the data collected from two types of trains： G13 from Beijing South to Shanghai Hongqiao and T109 from Beijing to Shanghai. Also, questionnaire survey was conducted in both trains. After data processing, the results show that there is a linear relationship between the RPCB and ticket fare with a correlation coefficient of 0.9616.展开更多
The transportation of drugs in body, without exception, are governed by thermo-dynamic rules. However, owing to the complexity of organism, it is difficult to make it clear. Pharmacokinetics is concerned with accounti...The transportation of drugs in body, without exception, are governed by thermo-dynamic rules. However, owing to the complexity of organism, it is difficult to make it clear. Pharmacokinetics is concerned with accounting for the whereabout of a drug quantitatively after it has been introduced into the body. By means of展开更多
文摘[目的/意义]情报信息的分散化分布规律是情报活动的基石,一些交叉性、前沿性政策类情报文本,呈现明显分散化特征,探寻此类情报信息量化研究方法,具有重要学术意义和现实紧迫性。[方法/过程]该文利用自然语言处理方法(Natural Language Processing,NLP),对旅游交通政策这一交叉领域的分散化政策演进进行量化分析。[结果/结论]研究验证了该方法对分散化政策类情报信息分析的适用性。结果表明:基于规则的命名实体识别对政策总量与结构的分析显示,发文总量逐年上升,不同时期政策结构有所差异。基于规则和统计模型的命名实体识别对政策制定主体的分析显示,政策颁发机构数量呈起伏上升趋势,多部门参与局面渐显。基于词性和句法分析的政策内容演进显示:“事故”始终是政策内容的语义核心词;语义聚焦主题词演进兼具继承性和发展性。
基金jointly supported by the Traffic and Transportation Engineering Experiment and Comprehensive Innovation Center, School of Transportation and Logistics, Southwest Jiaotong University, Chengdu Sichuansubsidized by National Natural Science Foundation of China (71173177)+1 种基金China State Railway Administration of Science and Technology Legal Division (KF2013-020)2015 Graduate Innovative Experimental and Practice Program (YC201507103), Southwest Jiaotong University
文摘A comfortable environment in railway passenger coaches can be regarded as a resource for social consumption during the transport process. Railway passenger comfort benefits （RPCBs） can be regarded as a special generalized cost. In this paper, we select a series of objective and subjective indexes to formulate a quantitative method of calculating the RPCB with considering ticket fares. This method includes three steps： make the initial data dimensionless, calculate the weight of each index, and finally calculate the RPCBs. The proposed method was validated with the data collected from two types of trains： G13 from Beijing South to Shanghai Hongqiao and T109 from Beijing to Shanghai. Also, questionnaire survey was conducted in both trains. After data processing, the results show that there is a linear relationship between the RPCB and ticket fare with a correlation coefficient of 0.9616.
文摘The transportation of drugs in body, without exception, are governed by thermo-dynamic rules. However, owing to the complexity of organism, it is difficult to make it clear. Pharmacokinetics is concerned with accounting for the whereabout of a drug quantitatively after it has been introduced into the body. By means of
