In the early 1950s,at the height of America’s McCarthyite witch hunts and anti-communist hysteria,Trinidad-born C.L.R.James,who had been living in the United States illegally since 1938,was arrested and held for depo...In the early 1950s,at the height of America’s McCarthyite witch hunts and anti-communist hysteria,Trinidad-born C.L.R.James,who had been living in the United States illegally since 1938,was arrested and held for deportation on the basis of his Marxist philosophy and activism.While imprisoned on Ellis Island,he drafted the text of Mariners,Renegades and Castaways:The Story of Herman Melville and the World We Live In,a book that is equal parts literary criticism and argument for the very Americanness of James’s revolutionary thought.This essay examines the discussions within James’s revolutionary organization surrounding the composition of that work,and the centrality of Melville to their visions of a revolutionary America.展开更多
The adoption of applicable artificial intelligence technologies to library real-time virtual reference services is an innovative experimentation in one of the key areas of library services. Based on the open source so...The adoption of applicable artificial intelligence technologies to library real-time virtual reference services is an innovative experimentation in one of the key areas of library services. Based on the open source software Artificial Linguistic Internet Computer Entity(A.L.I.C.E.) and a combined application of several other relevant supporting technologies for facilitating the use of the current existing library resources, Tsinghua University Library has recently developed a real-time smart talking robot, named Xiaotu,for the enhancement of its various service functions, such as reference services, book searching, Baidu Baike searching, self-directed learning, etc. The operation of Xiaotu is programmed into Renren website(a social networking website), which adds significantly an innovative feature to the modus operandi of the real-time virtual reference service at Tsinghua University Library.展开更多
目的分析C.O.L.V.E.I.评分系统对预测逆行输尿管软镜碎石术(retrograde intrarenal surgery,RIRS)术后结石清除率的价值。方法回顾性分析2020年10月至2021年10月湖南医药学院第一附属医院122例行RIRS的输尿管上段及肾结石患者的临床资料...目的分析C.O.L.V.E.I.评分系统对预测逆行输尿管软镜碎石术(retrograde intrarenal surgery,RIRS)术后结石清除率的价值。方法回顾性分析2020年10月至2021年10月湖南医药学院第一附属医院122例行RIRS的输尿管上段及肾结石患者的临床资料,建立C.O.L.V.E.I.评分系统[主要包括结石最大直径(cumulative stone diameter,C)、梗阻程度(obstruction,O)、肾盏漏斗部长度(length of calyces funnel,L)、累及肾盏数(visible number of calyces,V)、结石密度(essence of stone,E)、肾盂输尿管长轴线与肾下盏漏斗部长轴线的夹角(IPA,I)]进行评价,根据评分情况分成低分组41例、中分组66例、高分组15例,根据术后有无结石残留分成残留组28例与无残留组94例,观察患者手术相关情况,比较不同结石残留组C.O.L.V.E.I.评分差异,采用相关性分析C.O.L.V.E.I.评分系统预测RIRS术后结石清除率的价值。结果患者手术均顺利完成,结石总清除率为77.05%。高分组手术时间最长,低分组结石清除率最高,三组比较差异有统计学意义(P<0.05)。残留组C、L、V、E评分均高于无残留组,差异有统计学意义(P<0.05);在O、I评分方面,两组比较差异无统计学意义(P>0.05);评分系统中C、L、V同术后结石清除率有显著相关性,差异有统计学意义(P<0.05);C、O、L、V、E、I联合与结石清除率的相关性最为明显,差异有统计学意义(P<0.05)。结论应用C.O.L.V.E.I.评分系统预测RIRS术后结石清除率的价值突出。展开更多
Two new sterols. 3 beta,7 alpha, 16 beta-trihydroxy-stigmast-5,22-diene 1,3 beta,7 alpha,16 beta-trihydroxy-stigmast-5-ene 2. were isolated together with two known ergosterols, ergosta-5,24(28)-diene-3 beta.7 alpha-di...Two new sterols. 3 beta,7 alpha, 16 beta-trihydroxy-stigmast-5,22-diene 1,3 beta,7 alpha,16 beta-trihydroxy-stigmast-5-ene 2. were isolated together with two known ergosterols, ergosta-5,24(28)-diene-3 beta.7 alpha-diol, ergosta-5,24(28)-diene-3 beta,7 beta,16 beta-triol from the bark of Amoora yunnanensis (H. L. Li) C. Y. Wu. Their structures were deduced on the basis of spectral data.展开更多
Using the data taken from Tibet II High Density （HD） Array （1997 February-1999 September） and Tibet-III array （1999 November--2005 November）, our previous northern sky survey for TeV γ-ray point sources has now...Using the data taken from Tibet II High Density （HD） Array （1997 February-1999 September） and Tibet-III array （1999 November--2005 November）, our previous northern sky survey for TeV γ-ray point sources has now been updated by a factor of 2.8 improved statistics. From 0.0° to 60.0° in declination （Dec） range, no new TeV T-ray point sources with sufficiently high significance were identified while the well-known Crab Nebula and Mrk421 remain to be the brightest TeV γ-ray sources within the field of view of the Tibet air shower array. Based on the currently available data and at the 90% confidence level （C.L.）, the flux upper limits for different power law index assumption are re-derived, which are approximately improved by 1.7 times as compared with our previous reported limits.展开更多
文摘In the early 1950s,at the height of America’s McCarthyite witch hunts and anti-communist hysteria,Trinidad-born C.L.R.James,who had been living in the United States illegally since 1938,was arrested and held for deportation on the basis of his Marxist philosophy and activism.While imprisoned on Ellis Island,he drafted the text of Mariners,Renegades and Castaways:The Story of Herman Melville and the World We Live In,a book that is equal parts literary criticism and argument for the very Americanness of James’s revolutionary thought.This essay examines the discussions within James’s revolutionary organization surrounding the composition of that work,and the centrality of Melville to their visions of a revolutionary America.
基金supported by the Foundation for Humanities and Social Sciences of the Chinese Ministry of Education(Grant No.:11BTQ011)
文摘The adoption of applicable artificial intelligence technologies to library real-time virtual reference services is an innovative experimentation in one of the key areas of library services. Based on the open source software Artificial Linguistic Internet Computer Entity(A.L.I.C.E.) and a combined application of several other relevant supporting technologies for facilitating the use of the current existing library resources, Tsinghua University Library has recently developed a real-time smart talking robot, named Xiaotu,for the enhancement of its various service functions, such as reference services, book searching, Baidu Baike searching, self-directed learning, etc. The operation of Xiaotu is programmed into Renren website(a social networking website), which adds significantly an innovative feature to the modus operandi of the real-time virtual reference service at Tsinghua University Library.
文摘目的分析C.O.L.V.E.I.评分系统对预测逆行输尿管软镜碎石术(retrograde intrarenal surgery,RIRS)术后结石清除率的价值。方法回顾性分析2020年10月至2021年10月湖南医药学院第一附属医院122例行RIRS的输尿管上段及肾结石患者的临床资料,建立C.O.L.V.E.I.评分系统[主要包括结石最大直径(cumulative stone diameter,C)、梗阻程度(obstruction,O)、肾盏漏斗部长度(length of calyces funnel,L)、累及肾盏数(visible number of calyces,V)、结石密度(essence of stone,E)、肾盂输尿管长轴线与肾下盏漏斗部长轴线的夹角(IPA,I)]进行评价,根据评分情况分成低分组41例、中分组66例、高分组15例,根据术后有无结石残留分成残留组28例与无残留组94例,观察患者手术相关情况,比较不同结石残留组C.O.L.V.E.I.评分差异,采用相关性分析C.O.L.V.E.I.评分系统预测RIRS术后结石清除率的价值。结果患者手术均顺利完成,结石总清除率为77.05%。高分组手术时间最长,低分组结石清除率最高,三组比较差异有统计学意义(P<0.05)。残留组C、L、V、E评分均高于无残留组,差异有统计学意义(P<0.05);在O、I评分方面,两组比较差异无统计学意义(P>0.05);评分系统中C、L、V同术后结石清除率有显著相关性,差异有统计学意义(P<0.05);C、O、L、V、E、I联合与结石清除率的相关性最为明显,差异有统计学意义(P<0.05)。结论应用C.O.L.V.E.I.评分系统预测RIRS术后结石清除率的价值突出。
文摘Two new sterols. 3 beta,7 alpha, 16 beta-trihydroxy-stigmast-5,22-diene 1,3 beta,7 alpha,16 beta-trihydroxy-stigmast-5-ene 2. were isolated together with two known ergosterols, ergosta-5,24(28)-diene-3 beta.7 alpha-diol, ergosta-5,24(28)-diene-3 beta,7 beta,16 beta-triol from the bark of Amoora yunnanensis (H. L. Li) C. Y. Wu. Their structures were deduced on the basis of spectral data.
基金Supported by Grants-in-Aid for Scientific Research on Priority Areas (712) (MEXT)Japan Society for Promotion of Science(JSPS)+1 种基金National Natural Science Foundation of China (10675134,10533020)Chinese Academy of Sciences
文摘Using the data taken from Tibet II High Density （HD） Array （1997 February-1999 September） and Tibet-III array （1999 November--2005 November）, our previous northern sky survey for TeV γ-ray point sources has now been updated by a factor of 2.8 improved statistics. From 0.0° to 60.0° in declination （Dec） range, no new TeV T-ray point sources with sufficiently high significance were identified while the well-known Crab Nebula and Mrk421 remain to be the brightest TeV γ-ray sources within the field of view of the Tibet air shower array. Based on the currently available data and at the 90% confidence level （C.L.）, the flux upper limits for different power law index assumption are re-derived, which are approximately improved by 1.7 times as compared with our previous reported limits.
