A Method to Do Lexical Analysis while Word-position Tagging

提出了一种新的字位置信息标记,使用该标记可以实现字标注分词和词性分析的一体化。通过设计一套包含了词性信息的字位置信息标记,在训练前对训练语料进行改造,将训练语料转化成用新标记标注的语料,然后根据转化的结果进行训练,并用训练产生的隐马模型(HMM)对待分词字符串进行字标注,最后找出最大概率路径作为分词结果,该分词结果同时也包含了词法分析的结果。该文将隐马模型中的VITErbI算法修改成n-VITErbI算法,采用n-VITErbI算法可以实现查找分词图中的前n条最大概率路径。实验表明,该模型可以较准确的完成分词操作,同时可以产生有一定引导作用的词法分析结果。A new kind of tags for the word-position tagging.word-position tagging and lexical analysis integration can be achieved using the new tags.the new kind of tags contains both the lexical information and the word-position information,before the training process,modify the trainning data using the new tags,then train the word segment model with the modified trainning data,after the trainning fin ished,use the model to do a word segment process on a sentence,then get the result from the model.the result will be both the word seg ment result and the lexical analysis result.This article also changed the viberti algorithm of HMM into N-viberti,which can find the top N results of a word segment graphy.Experiments show that through the model,we can get a good word segment result,and a lexical analysis result in the same time,though the accuracy is still relatively low

An Algorithm for Text Classification Based on KNN

knn(k-nEArEST nEIgHbOr)是向量空间模型中最好的文本分类算法之一。但是,当样本集较大以及文本向量维数较多时,knn算法分类的效率和准确率就会大大降低。该文提出了一种提高knn分类效率的改进算法,并且改进了相似度的计算方法,能更准确的判断维数高且样本集大的文本向量。算法在训练过程中计算出各类文本在向量空间中的分布范围,在分类过程中,根据待分类文本向量在样本空间中的分布位置,缩小其k最近邻搜索范围。实验证实改进的算法可以在保持knn分类性能基本不变的情况下,显著提高分类效率。KNN(K-Nearest Neighbor) is one of the best text classification algorithms by Vector Support Model.However,its efficiency and accuracy rate are very low for text classification task with high dimension and huge samples.In this paper,a new algorithm is intro duced to improve the efficiency rate.For high precision,we also have a new way to compute the similarity of two texts.The distribution of training samples of each class is computed in the training process.According to the position of the documents in the sample space,this al gorithm can reduce the searching range of their K nearest neighbors in the classing process.The results of experiments show that this algo rithm can save largely the classification time and has almost the same classification performance as that of the traditional KNN classification algorithm

茶多酚锰络合物诱导肝癌细胞凋亡的差异蛋白质表达

目的研究茶多酚锰络合物(TP-Mn)诱导肝癌细胞HepG2凋亡过程中差异蛋白质的表达。方法 HepG2细胞分别与茶多酚(TP)700 mg·L-1,TP-Mn 700 mg·L-1,茶多酚锗(TP-Ge)700 mg·L-1作用48 h后,光学显微镜法观察细胞形态的变化;流式细胞仪检测细胞凋亡率;双向聚丙烯酰胺凝胶电泳(2D-PAGE)法分离HepG2细胞表达的差异蛋白;肽质量指纹法鉴定差异蛋白质。结果光学显微镜检查发现,TP和TP-Mn组HepG2细胞数量明显减少,细胞皱缩变形,并出现死亡细胞;TP-Ge组HepG2细胞数量无明显减少。流式细胞仪检测发现,TP-Mn组细胞凋亡率为(30.1±0.7)%,明显高于TP组(12.3±0.4)%(P<0.05)。2D-PAGE结果显示,TP-Mn诱导HepG2细胞凋亡过程中表达了多种差异蛋白质;肽质量指纹法鉴定结果显示,其中匹配率较高的差异蛋白质为γ-肌动蛋白和酪氨酸3/色氨酸5-单加氧酶激活蛋白。结论 TP-Mn具有诱导HepG2细胞凋亡的能力,并有差异蛋白质表达

An Empirical Study on the Effects of Producer Service Import on China's Employment

通过对生产者服务进口影响中国就业的效应进行实证研究发现,长期而言,生产者服务进口额每增加1%,服务业的就业将会增加0.24%,但对制造业就业并没有显著影响。其中,信息服务进口对服务业和制造业就业都没有显著影响;交通运输服务进口额每增加1%,制造业(服务业)的就业水平将会增长0.147%(0.275%);其他商业服务进口额每增加1%,服务业的就业水平将增加0.189%,但对制造业就业没有显著影响。短期而言,生产者服务进口对就业同时产生促进效应,但效应较小。政府应降低生产者服务进口壁垒以促进国内就业水平的提高。Through the empirical study on effects of producer service import on China's employment,it is found that in the long term 1% increase on the amount of imports of producer service will bring about 0.24% increase on employment of service sectors,but has no significant effects on employment in manufacturing.Specifically,information service import has no significant effects on both service and manufacturing employment,1% increase on the amount of imports of transportation service will bring about 0.147%/ 0.275% increase on manufacturing / service employment,1% increase on the amount of imports of other commercial service will bring about 0.189% increase on employment of service sector,but has no significant effects on manufacturing.In the short term,import of producer service has stimulation effects on employment,but the effect is weak.The government should reduce import barrier on producer service to improve domestic employment.上海市教育委员会科研创新项目(10YZ194

Determined Factors of International Trade in China's Cultural Goods:A Panel Data Analysis

中国文化进口主要集中于综合国力较强的发达国家,而且绝大多数文化产品进口受到出口国市场容量大小的影响,如建筑和设计、珠宝等,但受中国购买力水平影响较小;中国绝大多数文化产品出口受进口国购买力水平影响较为明显;中国文化生产效率的提高可促进其他视觉艺术、珠宝、电影和录像、建筑和设计等文化产品的出口,但对中国文化进口的影响并不明显;除古董进口及其他视觉艺术的出口以外,中国绝大多数文化产品的进、出口与距离变量呈负相关关系;自由贸易区可以促进中国绝大多数文化产品的进、出口。Most of China's import in cultural goods are from developed countries,and highly influenced by exporters market conditions,such as architecture,design and jewellery.China's import of cultural goods is less influenced by China's purchasing power.However,most of China's export in cultural goods is highly influenced by importer's purchasing power.The productivity of cultural goods has little effect on China's import of culture goods,but has a positive effect on China's export of other visual arts,jewellery,film and video,architecture and design.Apart from the import of antique and export of visual arts,most of import and export of cultural goods have negative effects with distance.Most of import and export of cultural goods can be improved by free trade area.教育部人文社会科学青年项目“中国对外文化业产业内贸易的决定因素、模式与政策研究”(10YJC790192);上海市教育委员会重点学科建设项目(第五期)“国际贸易”(J51702)的阶段性研究成果之

Information Cost and International Trade——A Panel Data Analysis of the Effects of Asia Ethnic Chinese Networks and ICT on the International Trade of China

信息成本是国际贸易中的主要交易成本,而社会网络和信息通讯技术可以减少这一交易成本从而促进国际贸易的发生。结果表明,在这两类因素中,分布在亚洲的华商网络对中国对外贸易发展所作出的贡献要远远大于信息通讯技术改善所作的贡献,并且这两者之间也存在着一种相互促进与相互抑制的交互作用。文章表明,信息通讯技术网络的改善会明显抑制亚洲华商网络对中国进口贸易的促进作用,但同时对亚洲华商网络促进中国出口贸易的效应影响不大。The new estimates of the effects of Asian Ethnic Chinese Network and ICT on Inter- national Trade of China is provided. Asian Ethnic Chinese Network are more important in facili- tating Chinese international trade than ICT,in fact,with the improvement of ICT network be- tween China and Asian Countries,it will worsening the positive effect that the Asian Ethnic Chi- nese Network on Chinese imports,but has little effect on Chinese exports.教育部人文社会科学重点研究基地重大项目“中国经济内外均衡的协调研究:理论、证据与政策”的阶段性成果(项目号:2006JDXM207)

新世纪日本的对外援助及其管理

1989年日本成为世界第一大援助国并连续八年保持世界第一。新世纪日本对外援助总量虽已不如从前,但总的来说其对外援助管理体系发展较为成熟。本文拟对新世纪日本的对外援助及其管理体系进行研究,分析其对外援助的战略及政策、组织与管理,并对其援助的有效性做出评价

An Empirical Study on the Interactions Between Modes of Supply in Trade in Service

在制定服务贸易政策时,政府往往忽略服务贸易提供模式之间存在的交互效应,从而导致贸易政策的效果产生偏差。本文通过1986—2006年美国服务贸易出口数据对服务贸易四种提供模式之间的交互影响进行实证检验,以及采用脉冲响应、方差分解技术深入剖析了不同服务贸易提供模式之间交互影响的变动规律及其贡献率的大小。It is more complicated when constructing policy of trade in service,such as the interactions be- tween modes of supply.With US export data,we can find out that the intrinsic relations between these four modes of supply.In addition,using time series econometric methods,we also conclude the extent to which different supply mode contributes each other.上海市重点学科资助研究项目(第二期，项目编号：P1601

Comparative Advantage Analysis on the Modes of Supply of Trade in Service

服务贸易四种提供模式都以不同方式影响着服务贸易的比较优势,但囿于传统国际贸易比较优势研究方法,并不能对服务贸易提供模式的比较优势进行全面、准确分析。本文通过构建服务贸易提供模式的显示性比较优势指数、竞争优势指数及fdI竞争优势指数,并在此基础上对美国、日本、匈牙利和中国的服务贸易提供模式比较优势进行分析。This paper evaluating comparative advantage of trade in service from the modes of supply of trade in service.Because the methods of traditional international trade comparative advantage can not explicit analysis the comparative advantage of modes of supply of trade in service,so we construct the new RCA index,TC index and FC index and calculating these index on US,Japan,Hungary,and China.博士后科学基金(项目批准号:20080440589);2008年度上海高校选拔培养优秀青年教师科研专项基金(slx08034

Empirical Study on Weak-Business Cycle of Trade in Service during Economic Crisis

在经济危机(衰退)期间,服务贸易的波动要弱于货物贸易的波动(即弱周期性)。其中,又以教育服务贸易和商业、专业技术服务贸易为代表的其他私人服务贸易稳定性最强。为在经济危机(衰退)期间保持国际贸易的稳定,政府应发挥服务贸易的“弱周期性“特征,大力发展教育和商业、专业技术服务贸易,加大自然人跨国暂时流动的开放力度。We argue that trade in service represents weak-fluctuation feature during the economic crisis.And we try to qualify these effects through the H-P filter measure and US data during the last two economic crisis.It is found that the fluctuations of trade in service is smaller than trade in goods(refers as Weak-Business Cycle),and the fluctuation of other private service is the smallest of all the service trade segment.In addition,education service and business,professional and technical services are steadier than trade in other private services.Then developing education and business,professional and technical services is a tool for keeping international trade stable during the economic crisis.上海市教育委员会重点学科建设项目(第五期)“国际贸易”(J51702);2010年度上海市教育委员会科研创新项目“服务经济波动对中国宏观经济影响的效应研究”(10YZ194