[目的/意义]通过InciteTM数据库中学科规范化的引文影响系数指标研究中国大陆期刊对各一级学科的影响力,探讨中国大陆期刊在所属学科建设中的作用。[方法/过程]从Web of Science平台上的JCR和InciteTM数据库中下载2010-2014年中国大陆...[目的/意义]通过InciteTM数据库中学科规范化的引文影响系数指标研究中国大陆期刊对各一级学科的影响力,探讨中国大陆期刊在所属学科建设中的作用。[方法/过程]从Web of Science平台上的JCR和InciteTM数据库中下载2010-2014年中国大陆期刊数据及其对各一级学科的学科规范化引文影响系数以及全球和中国大陆各一级学科基准。同时以SPSS20.0进行相关的统计分析。[结果/结论]期刊对所属一级学科的影响力得到评价。各一级学科被收录期刊种数的多寡并不是提高期刊对所属学科影响力的主要因素。被JCR和InciteTM收载的中国大陆期刊对所属一级学科的影响力高于全球基准值和大陆基准值的分别有19种和22种,涵盖两个以上一级学科的分别有7种和5种。其中《科学通报》尤为突出。提出了提升我国科技期刊学科影响力的策略。展开更多
为了促进"双一流"建设,联合运用Web of Science、In Cites、ESI、JCR、ISIS数据库和SPSS分析工具,从发文数量、期刊来源、被引频次、高被引论文、合作地区与机构、ESI学科等9个方面19个指标因子,对辽宁工程技术大学、山东科...为了促进"双一流"建设,联合运用Web of Science、In Cites、ESI、JCR、ISIS数据库和SPSS分析工具,从发文数量、期刊来源、被引频次、高被引论文、合作地区与机构、ESI学科等9个方面19个指标因子,对辽宁工程技术大学、山东科技大学、安徽理工大学、西安科技大学和河南理工大学5所高校最近10年的学术贡献进行了综合对比分析,从学术优势及发展潜力方面开展了多维度、多指标因子的深度评价与剖析。展开更多
目的从学科规范化引文影响力(CNCI)视角分析某高校附属医院2015—2019年发表的SCI论文基本情况与特征,为SCI论文科研管理政策调整提供参考依据。方法从该医院的科研管理系统中检索2015—2019年以第一或通讯单位完成的SCI收录论文,利用We...目的从学科规范化引文影响力(CNCI)视角分析某高校附属医院2015—2019年发表的SCI论文基本情况与特征,为SCI论文科研管理政策调整提供参考依据。方法从该医院的科研管理系统中检索2015—2019年以第一或通讯单位完成的SCI收录论文,利用Web of Science、InCites数据库获取该组论文的期刊、影响因子、JCR分区及学科规范化引文影响力等指标数据,运用SPSS 21.0统计软件进行描述性及卡方检验。结果该高校附属医院在2015—2019年发表SCI论文3201篇,数量呈现增长趋势。论文以1<IF<3区间最多,占比44.92%;其次为3<IF<5区间,占比32.27%。论文集中在Q2区期刊,占比31.52%,Q1和Q3区期刊各占比25%。从学科规范化引文影响力角度来看,2015—2017年度论文的篇均CNCI小于1,2018—2019年度论文的篇均CNCI大于1,不同年度之间的CNCI无统计学差异。IF小于3的论文篇均CNCI小于1,IF大于3的论文篇均CNCI大于1,高影响因子论文的高CNCI比例更高;Q1、Q2区论文的篇均CNCI大于1,Q3、Q4区论文的篇均CNCI小于1,Q1区论文的高CNCI比例更高。结论不同科研管理视角下得出的评价结论并不一致,在期刊分区基础上的CNCI分层综合评价更为合理。在新时期不唯论文数量和影响因子等指标的情况下,遴选学科领域内的顶级期刊,同时将学科规范化引文影响力等综合评价指标应用于科技论文管理评价具有一定的现实意义。展开更多
AIM:To evaluate the safety and effectiveness of twostage vs single-stage management for concomitant gallstones and common bile duct stones.METHODS:Four databases,including PubMed,Embase,the Cochrane Central Register o...AIM:To evaluate the safety and effectiveness of twostage vs single-stage management for concomitant gallstones and common bile duct stones.METHODS:Four databases,including PubMed,Embase,the Cochrane Central Register of Controlled Trials and the Science Citation Index up to September 2011,were searched to identify all randomized controlled trials(RCTs).Data were extracted from the studies by two independent reviewers.The primary outcomes were stone clearance from the common bile duct,postoperative morbidity and mortality.The secondary outcomes were conversion to other procedures,number of procedures per patient,length of hospital stay,total operative time,hospitalization charges,patient acceptance and quality of life scores.RESULTS:Seven eligible RCTs [five trials(n = 621) comparing preoperative endoscopic retrograde cholangiopancreatography(ERCP)/endoscopic sphincterotomy(EST) + laparoscopic cholecystectomy(LC) with LC + laparoscopic common bile duct exploration(LCBDE);two trials(n = 166) comparing postoperative ERCP/EST + LC with LC + LCBDE],composed of 787 patients in total,were included in the final analysis.The metaanalysis detected no statistically significant difference between the two groups in stone clearance from the common bile duct [risk ratios(RR) =-0.10,95% confidence intervals(CI):-0.24 to 0.04,P = 0.17],postoperative morbidity(RR = 0.79,95% CI:0.58 to 1.10,P = 0.16),mortality(RR = 2.19,95% CI:0.33 to 14.67,P = 0.42),conversion to other procedures(RR = 1.21,95% CI:0.54 to 2.70,P = 0.39),length of hospital stay(MD = 0.99,95% CI:-1.59 to 3.57,P = 0.45),total operative time(MD = 12.14,95% CI:-1.83 to 26.10,P = 0.09).Two-stage(LC + ERCP/EST) management clearly required more procedures per patient than single-stage(LC + LCBDE) management.CONCLUSION:Single-stage management is equivalent to two-stage management but requires fewer procedures.However,patient's condition,operator's expertise and local resources should be taken into account in making treatment decisions.展开更多
This study aimed to identify and to analyze characteristics of top-cited articles published in the Web of Science chemical engineering subject category from 1899 to 2011.Articles that have been cited more than 100 tim...This study aimed to identify and to analyze characteristics of top-cited articles published in the Web of Science chemical engineering subject category from 1899 to 2011.Articles that have been cited more than 100 times were assessed regarding publication outputs,and distribution of outputs in journals.Five bibliometric indicators were used to evaluate source countries,institution and authors.A new indicator,Y-index,was created to assess quantity and quality of contribution to articles.Results showed that 3828 articles,published between 1931 and 2010,had been cited at least 100 times.Among them 54% published before 1991,and 49% top-cited articles originated from US.The top eight productive institutions were all located in US.The top journals were Journal of Catalysis,AIChE Journal,Chemical Engineering Science and Journal of Membrane Science.Y-index was successfully applied to evaluate publication character of authors,institutions,and countries/regions.展开更多
AIM:To compare non-liquid and clear-liquid diets,and to assess whether the latter is the optimal treatment for mild acute pancreatitis.METHODS:The Cochrane Library,PUBMED,EMBASE,EBM review databases,Science Citation I...AIM:To compare non-liquid and clear-liquid diets,and to assess whether the latter is the optimal treatment for mild acute pancreatitis.METHODS:The Cochrane Library,PUBMED,EMBASE,EBM review databases,Science Citation Index Expanded,and several Chinese databases were searched up to March 2011.Randomized controlled trials(RCTs) that compared non-liquid with clear-liquid diets in patients with mild acute pancreatitis were included.A meta-analysis was performed using available evidence from RCTs.RESULTS:Three RCTs of adequate quality involving a total of 362 participants were included in the final analysis.Compared to liquid diet,non-liquid diet significantly decreased the length of hospitalization [mean difference(MD):1.18,95% CI:0.82-1.55;P﹤0.00001] and total length of hospitalization(MD:1.31,95% CI:0.45-2.17;P = 0.003).The subgroup analysis showed solid diet was more favorable than clear liquid diet in the length of hospitalization,with a pooled MD being-1.05(95% CI:-1.43 to-0.66;P﹤0.00001).However,compared with clear liquid diet,both soft and solid diets did not show any significant differences for recurrence of pain after re-feeding,either alone [relative risk(RR):0.95;95% CI:0.51-1.87;P = 0.88] and(RR:1.22;95% CI:0.69-2.16;P = 0.49),respectively,or analyzed together as non-liquid diet(RR:0.80;95% CI:0.47-1.36;P = 0.41).CONCLUSION:The non-liquid soft or solid diet did not increase pain recurrence after re-feeding,compared with the clear-liquid diet.The non-liquid diet reduced hospitalization.展开更多
AIM:To quantitatively assess the relationship between coffee consumption and incidence of pancreatic cancer in a meta-analysis of cohort studies. METHODS:We searched MEDLINE,EMBASE,Science Citation Index Expanded and ...AIM:To quantitatively assess the relationship between coffee consumption and incidence of pancreatic cancer in a meta-analysis of cohort studies. METHODS:We searched MEDLINE,EMBASE,Science Citation Index Expanded and bibliographies of retrieved articles.Studies were included if they reported relative risks(RRs)and corresponding 95%CIs of pancreatic cancer with respect to frequency of coffee intake.We performed random-effects meta-analyses and metaregressions of study-specific incremental estimates to determine the risk of pancreatic cancer associated with a 1 cup/d increment in coffee consumption. RESULTS:Fourteen studies met the inclusion criteria, which included 671 080 individuals(1496 cancer events) with an average follow-up of 14.9 years.Compared with individuals who did not drink or seldom drank coffee per day,the pooled RR of pancreatic cancer was 0.82 (95%CI:0.69-0.95)for regular coffee drinkers,0.86 (0.76-0.96)for low to moderate coffee drinkers,and 0.68(0.51-0.84)for high drinkers.In subgroup analyses,we noted that,coffee drinking was associated witha reduced risk of pancreatic cancer in men,while this association was not seen in women.These associations were also similar in studies from North America,Europe, and the Asia-Pacific region. CONCLUSION:Findings from this meta-analysis suggest that there is an inverse relationship between coffee drinking and risk of pancreatic cancer.展开更多
AIM:To quantitatively assess the relationship between energy intake and the incidence of digestive cancers in a meta-analysis of cohort studies.METHODS:We searched MEDLINE,EMBASE,Science Citation Index Expanded,and th...AIM:To quantitatively assess the relationship between energy intake and the incidence of digestive cancers in a meta-analysis of cohort studies.METHODS:We searched MEDLINE,EMBASE,Science Citation Index Expanded,and the bibliographies of retrieved articles.Studies were included if they reported relative risks(RRs) and corresponding 95% CIs of digestive cancers with respect to total energy intake.When RRs were not available in the published article,they were computed from the exposure distributions.Data were extracted independently by two investigators and discrepancies were resolved by discussion with a third investigator.We performed fixed-effects meta-analyses and meta-regressions to compute the summary RR for highest versus lowest category of energy intake and for per unit energy intake and digestive cancer incidence by giving each study-specific RR a weight that was proportional to its precision.RESULTS:Nineteen studies consisting of 13 independent cohorts met the inclusion criteria.The studiesincluded 995 577 participants and 5620 incident cases of digestive cancer with an average follow-up of 11.1 years.A significant inverse association was observed between energy intake and the incidence of digestive cancers.The RR of digestive cancers for the highest compared to the lowest caloric intake category was 0.90(95% CI 0.81-0.98,P < 0.05).The RR for an increment of 239 kcal/d energy intake was 0.97(95% CI 0.95-0.99,P < 0.05) in the fixed model.In subgroup analyses,we noted that energy intake was associated with a reduced risk of colorectal cancer(RR 0.90,95% CI 0.81-0.99,P < 0.05) and an increased risk of gastric cancer(RR 1.19,95% CI 1.08-1.31,P < 0.01).There appeared to be no association with esophageal(RR 0.96,95% CI 0.86-1.07,P > 0.05) or pancreatic(RR 0.79,95% CI 0.49-1.09,P > 0.05) cancer.Associations were also similar in studies from North America and Europe.The RR was 1.02(95% CI 0.79-1.25,P > 0.05) when considering the six studies conducted in North America and 0.87(95% CI 0.77-0.98,P < 0.05) for the five studies from Europe.CONCLUSION:Our findings suggest that high energy intake may reduce the total digestive cancer incidence and has a preventive effect on colorectal cancer.展开更多
In China, to be an excellent doctor means to publish Science Citation Index （SCI） paper as much as possible. The scientific evaluation system based on the number of SCI publications becomes the only criteria for ran...In China, to be an excellent doctor means to publish Science Citation Index （SCI） paper as much as possible. The scientific evaluation system based on the number of SCI publications becomes the only criteria for ranking position of Chinese doctors. Who can save them from the slavery of SCI？展开更多
文摘[目的/意义]通过InciteTM数据库中学科规范化的引文影响系数指标研究中国大陆期刊对各一级学科的影响力,探讨中国大陆期刊在所属学科建设中的作用。[方法/过程]从Web of Science平台上的JCR和InciteTM数据库中下载2010-2014年中国大陆期刊数据及其对各一级学科的学科规范化引文影响系数以及全球和中国大陆各一级学科基准。同时以SPSS20.0进行相关的统计分析。[结果/结论]期刊对所属一级学科的影响力得到评价。各一级学科被收录期刊种数的多寡并不是提高期刊对所属学科影响力的主要因素。被JCR和InciteTM收载的中国大陆期刊对所属一级学科的影响力高于全球基准值和大陆基准值的分别有19种和22种,涵盖两个以上一级学科的分别有7种和5种。其中《科学通报》尤为突出。提出了提升我国科技期刊学科影响力的策略。
文摘为了促进"双一流"建设,联合运用Web of Science、In Cites、ESI、JCR、ISIS数据库和SPSS分析工具,从发文数量、期刊来源、被引频次、高被引论文、合作地区与机构、ESI学科等9个方面19个指标因子,对辽宁工程技术大学、山东科技大学、安徽理工大学、西安科技大学和河南理工大学5所高校最近10年的学术贡献进行了综合对比分析,从学术优势及发展潜力方面开展了多维度、多指标因子的深度评价与剖析。
文摘目的从学科规范化引文影响力(CNCI)视角分析某高校附属医院2015—2019年发表的SCI论文基本情况与特征,为SCI论文科研管理政策调整提供参考依据。方法从该医院的科研管理系统中检索2015—2019年以第一或通讯单位完成的SCI收录论文,利用Web of Science、InCites数据库获取该组论文的期刊、影响因子、JCR分区及学科规范化引文影响力等指标数据,运用SPSS 21.0统计软件进行描述性及卡方检验。结果该高校附属医院在2015—2019年发表SCI论文3201篇,数量呈现增长趋势。论文以1<IF<3区间最多,占比44.92%;其次为3<IF<5区间,占比32.27%。论文集中在Q2区期刊,占比31.52%,Q1和Q3区期刊各占比25%。从学科规范化引文影响力角度来看,2015—2017年度论文的篇均CNCI小于1,2018—2019年度论文的篇均CNCI大于1,不同年度之间的CNCI无统计学差异。IF小于3的论文篇均CNCI小于1,IF大于3的论文篇均CNCI大于1,高影响因子论文的高CNCI比例更高;Q1、Q2区论文的篇均CNCI大于1,Q3、Q4区论文的篇均CNCI小于1,Q1区论文的高CNCI比例更高。结论不同科研管理视角下得出的评价结论并不一致,在期刊分区基础上的CNCI分层综合评价更为合理。在新时期不唯论文数量和影响因子等指标的情况下,遴选学科领域内的顶级期刊,同时将学科规范化引文影响力等综合评价指标应用于科技论文管理评价具有一定的现实意义。
文摘AIM:To evaluate the safety and effectiveness of twostage vs single-stage management for concomitant gallstones and common bile duct stones.METHODS:Four databases,including PubMed,Embase,the Cochrane Central Register of Controlled Trials and the Science Citation Index up to September 2011,were searched to identify all randomized controlled trials(RCTs).Data were extracted from the studies by two independent reviewers.The primary outcomes were stone clearance from the common bile duct,postoperative morbidity and mortality.The secondary outcomes were conversion to other procedures,number of procedures per patient,length of hospital stay,total operative time,hospitalization charges,patient acceptance and quality of life scores.RESULTS:Seven eligible RCTs [five trials(n = 621) comparing preoperative endoscopic retrograde cholangiopancreatography(ERCP)/endoscopic sphincterotomy(EST) + laparoscopic cholecystectomy(LC) with LC + laparoscopic common bile duct exploration(LCBDE);two trials(n = 166) comparing postoperative ERCP/EST + LC with LC + LCBDE],composed of 787 patients in total,were included in the final analysis.The metaanalysis detected no statistically significant difference between the two groups in stone clearance from the common bile duct [risk ratios(RR) =-0.10,95% confidence intervals(CI):-0.24 to 0.04,P = 0.17],postoperative morbidity(RR = 0.79,95% CI:0.58 to 1.10,P = 0.16),mortality(RR = 2.19,95% CI:0.33 to 14.67,P = 0.42),conversion to other procedures(RR = 1.21,95% CI:0.54 to 2.70,P = 0.39),length of hospital stay(MD = 0.99,95% CI:-1.59 to 3.57,P = 0.45),total operative time(MD = 12.14,95% CI:-1.83 to 26.10,P = 0.09).Two-stage(LC + ERCP/EST) management clearly required more procedures per patient than single-stage(LC + LCBDE) management.CONCLUSION:Single-stage management is equivalent to two-stage management but requires fewer procedures.However,patient's condition,operator's expertise and local resources should be taken into account in making treatment decisions.
文摘This study aimed to identify and to analyze characteristics of top-cited articles published in the Web of Science chemical engineering subject category from 1899 to 2011.Articles that have been cited more than 100 times were assessed regarding publication outputs,and distribution of outputs in journals.Five bibliometric indicators were used to evaluate source countries,institution and authors.A new indicator,Y-index,was created to assess quantity and quality of contribution to articles.Results showed that 3828 articles,published between 1931 and 2010,had been cited at least 100 times.Among them 54% published before 1991,and 49% top-cited articles originated from US.The top eight productive institutions were all located in US.The top journals were Journal of Catalysis,AIChE Journal,Chemical Engineering Science and Journal of Membrane Science.Y-index was successfully applied to evaluate publication character of authors,institutions,and countries/regions.
文摘AIM:To compare non-liquid and clear-liquid diets,and to assess whether the latter is the optimal treatment for mild acute pancreatitis.METHODS:The Cochrane Library,PUBMED,EMBASE,EBM review databases,Science Citation Index Expanded,and several Chinese databases were searched up to March 2011.Randomized controlled trials(RCTs) that compared non-liquid with clear-liquid diets in patients with mild acute pancreatitis were included.A meta-analysis was performed using available evidence from RCTs.RESULTS:Three RCTs of adequate quality involving a total of 362 participants were included in the final analysis.Compared to liquid diet,non-liquid diet significantly decreased the length of hospitalization [mean difference(MD):1.18,95% CI:0.82-1.55;P﹤0.00001] and total length of hospitalization(MD:1.31,95% CI:0.45-2.17;P = 0.003).The subgroup analysis showed solid diet was more favorable than clear liquid diet in the length of hospitalization,with a pooled MD being-1.05(95% CI:-1.43 to-0.66;P﹤0.00001).However,compared with clear liquid diet,both soft and solid diets did not show any significant differences for recurrence of pain after re-feeding,either alone [relative risk(RR):0.95;95% CI:0.51-1.87;P = 0.88] and(RR:1.22;95% CI:0.69-2.16;P = 0.49),respectively,or analyzed together as non-liquid diet(RR:0.80;95% CI:0.47-1.36;P = 0.41).CONCLUSION:The non-liquid soft or solid diet did not increase pain recurrence after re-feeding,compared with the clear-liquid diet.The non-liquid diet reduced hospitalization.
文摘AIM:To quantitatively assess the relationship between coffee consumption and incidence of pancreatic cancer in a meta-analysis of cohort studies. METHODS:We searched MEDLINE,EMBASE,Science Citation Index Expanded and bibliographies of retrieved articles.Studies were included if they reported relative risks(RRs)and corresponding 95%CIs of pancreatic cancer with respect to frequency of coffee intake.We performed random-effects meta-analyses and metaregressions of study-specific incremental estimates to determine the risk of pancreatic cancer associated with a 1 cup/d increment in coffee consumption. RESULTS:Fourteen studies met the inclusion criteria, which included 671 080 individuals(1496 cancer events) with an average follow-up of 14.9 years.Compared with individuals who did not drink or seldom drank coffee per day,the pooled RR of pancreatic cancer was 0.82 (95%CI:0.69-0.95)for regular coffee drinkers,0.86 (0.76-0.96)for low to moderate coffee drinkers,and 0.68(0.51-0.84)for high drinkers.In subgroup analyses,we noted that,coffee drinking was associated witha reduced risk of pancreatic cancer in men,while this association was not seen in women.These associations were also similar in studies from North America,Europe, and the Asia-Pacific region. CONCLUSION:Findings from this meta-analysis suggest that there is an inverse relationship between coffee drinking and risk of pancreatic cancer.
文摘AIM:To quantitatively assess the relationship between energy intake and the incidence of digestive cancers in a meta-analysis of cohort studies.METHODS:We searched MEDLINE,EMBASE,Science Citation Index Expanded,and the bibliographies of retrieved articles.Studies were included if they reported relative risks(RRs) and corresponding 95% CIs of digestive cancers with respect to total energy intake.When RRs were not available in the published article,they were computed from the exposure distributions.Data were extracted independently by two investigators and discrepancies were resolved by discussion with a third investigator.We performed fixed-effects meta-analyses and meta-regressions to compute the summary RR for highest versus lowest category of energy intake and for per unit energy intake and digestive cancer incidence by giving each study-specific RR a weight that was proportional to its precision.RESULTS:Nineteen studies consisting of 13 independent cohorts met the inclusion criteria.The studiesincluded 995 577 participants and 5620 incident cases of digestive cancer with an average follow-up of 11.1 years.A significant inverse association was observed between energy intake and the incidence of digestive cancers.The RR of digestive cancers for the highest compared to the lowest caloric intake category was 0.90(95% CI 0.81-0.98,P < 0.05).The RR for an increment of 239 kcal/d energy intake was 0.97(95% CI 0.95-0.99,P < 0.05) in the fixed model.In subgroup analyses,we noted that energy intake was associated with a reduced risk of colorectal cancer(RR 0.90,95% CI 0.81-0.99,P < 0.05) and an increased risk of gastric cancer(RR 1.19,95% CI 1.08-1.31,P < 0.01).There appeared to be no association with esophageal(RR 0.96,95% CI 0.86-1.07,P > 0.05) or pancreatic(RR 0.79,95% CI 0.49-1.09,P > 0.05) cancer.Associations were also similar in studies from North America and Europe.The RR was 1.02(95% CI 0.79-1.25,P > 0.05) when considering the six studies conducted in North America and 0.87(95% CI 0.77-0.98,P < 0.05) for the five studies from Europe.CONCLUSION:Our findings suggest that high energy intake may reduce the total digestive cancer incidence and has a preventive effect on colorectal cancer.
文摘In China, to be an excellent doctor means to publish Science Citation Index （SCI） paper as much as possible. The scientific evaluation system based on the number of SCI publications becomes the only criteria for ranking position of Chinese doctors. Who can save them from the slavery of SCI？
