温室气体CO_(2)深刻地影响着人类的生存环境,根据国家能源发展战略,高容量捕获CO_(2)主要用于缓解环境污染和生产高附加值化学品,如环状碳酸酯,因此,实现CO_(2)高容量捕获具有较好的科学价值和研究意义。本工作采用来源广泛、廉价易得...温室气体CO_(2)深刻地影响着人类的生存环境,根据国家能源发展战略,高容量捕获CO_(2)主要用于缓解环境污染和生产高附加值化学品,如环状碳酸酯,因此,实现CO_(2)高容量捕获具有较好的科学价值和研究意义。本工作采用来源广泛、廉价易得的叶酸作为前驱体,以KOH为活化剂,通过碳化—活化法获得CO_(2)吸附性能优异的叶酸衍生多孔碳。首先,采用BET、SEM、SEM-EDS、XRD、Raman和XPS表征系统研究了叶酸衍生多孔碳的物性、纹理和结构特征。随后,通过1 bar 0℃和1bar 25℃的CO_(2)吸附实验评估了叶酸衍生多孔碳的CO_(2)吸附性能。最后,详细探究了叶酸衍生多孔碳的物化属性和多孔特性在CO_(2)吸附过程中所起的作用。在我国实施“碳中和、碳达峰”的背景下,本研究可为工业领域实现负碳汇目标提供技术和理论支持。展开更多
BACKGROUND The continuous development of social and economic progress and ongoing enhancement of infrastructure construction has led to drastic changes in the occurrence of trauma.AIM To analyze the epidemiological ch...BACKGROUND The continuous development of social and economic progress and ongoing enhancement of infrastructure construction has led to drastic changes in the occurrence of trauma.AIM To analyze the epidemiological characteristics of trauma in Lanzhou City to provide theoretical references for improving quality of trauma care.METHODS A retrospective analysis of clinical data from 16585 trauma patients treated at the First Hospital of Lanzhou University Trauma Center from November 1,2021 to October 31,2023 was conducted.Data including age,sex,time of trauma,cause of trauma,and major injured body parts were statistically analyzed.RESULTS A total of 18235 patients were admitted,with complete data for 16585 cases.Of these,9793 were male and 6792 were female(male-to-female ratio of 1.44:1).The peak times for trauma occurrence were 10 AM-12 PM and 6-10 PM,and the peak months were from May to October.The leading causes of trauma were falls(45.32%),other trauma(15.88%),road traffic accidents(15.15%),violence(10.82%),cutting/stabbing(9.41%),mechanical injuries(2.65%),winter sports injuries(0.36%),animal bites(0.22%),burns(0.09%),and electrical injuries(0.02%).The distribution of majorly injured body parts showed statistical significance,with limbs/skin being the most affected followed by the head/neck,chest/abdomen,and back.CONCLUSION Medical institutions and government agencies can implement preventive measures and policies based on the characteristics of trauma determined in this study to enhance the quality and level of trauma care.展开更多
BACKGROUND Acute lower extremity deep venous thrombosis(LEDVT)is a common vascular emergency with significant morbidity risks,including post-thrombotic syndrome(PTS)and pulmonary embolism.Traditional treatments like c...BACKGROUND Acute lower extremity deep venous thrombosis(LEDVT)is a common vascular emergency with significant morbidity risks,including post-thrombotic syndrome(PTS)and pulmonary embolism.Traditional treatments like catheter-directed thrombolysis(CDT)often result in variable success rates and complications.AIM To investigate the therapeutic efficacy of percutaneous mechanical thrombus removal in acute LEDVT.METHODS A retrospective analysis was performed to examine 58 hospitalised patients with acute LEDVT between August 2019 and August 2022.The patients were categorised into the percutaneous mechanical thrombectomy(PMT)group(n=24)and CDT group(n=32).The follow-up,safety and treatment outcomes were compared between the two groups.The main observational indexes were venous patency score,thrombus removal effect,complications,hospitalisation duration and PTS.RESULTS The venous patency score was 9.04±1.40 in the PMT group and 8.81±1.60 in the CDT group,and the thrombus clearance rate was 100%in both groups.The complication rate was 8.33%in the PMT group and 34.84%in the CDT group,and the difference was statistically significant(P<0.05).The average hospitalisation duration was 6.54±2.48 days in the PMT group and 8.14±3.56 days in the CDT group.The incidence of PTS was lower in the PMT group than in the CDT group;however,the difference was not statistically significant(P<0.05).CONCLUSION Compared with CDT,treatment of LEDVT via PMT was associated with a better thrombus clearance rate,clinical therapeutic effect and PTS prevention function,but the difference was not statistically significant.Moreover,PMT was associated with a reduced urokinase dosage,shortened hospitalisation duration and reduced incidence of complications,such as infections and small haemorrhages.These results indicate that PMT has substantial beneficial effects in the treatment of LEDVT.展开更多
Advances in digital technology and vast data applications have resulted in the emergence of the digital economy paradigm,which is a new techno-economic paradigm for the digital economy age.Under this paradigm,the indu...Advances in digital technology and vast data applications have resulted in the emergence of the digital economy paradigm,which is a new techno-economic paradigm for the digital economy age.Under this paradigm,the industrial organization has shifted toward networked,platform-based,boundaryless,and integrated development with new characteristics.Specifically,there has been a fierce“positional arms race”fueled by financial capital,accelerating the growth of platform companies.The“hierarchical monopolistic competition”market structure has taken shape,resulting in a“coexistence without disruption”monopolistic competition.As platform businesses expand into new business sectors,competition among industrial ecosystems intensifies.Data and algorithms have become secret weapons for corporate success,allowing platform companies to expand their monopolistic forces.Industrial organization in the digital era has revolutionized the operating rules and logic of industrial economy,giving rise to new industries,business models,and paradigms,as well as being conducive to international cooperation and intelligent regulation.Meanwhile,it has introduced new challenges to socioeconomic development,making platform companies’anti-competitive and monopolistic behaviors more implicit,privacy and security concerns more conspicuous,and antitrust identification and investigation more difficult.The government should embrace the evolving trends of industrial organization in the digital economy era,accelerate regulatory transition,and strengthen governance and regulation under the digital economy paradigm.展开更多
文摘温室气体CO_(2)深刻地影响着人类的生存环境,根据国家能源发展战略,高容量捕获CO_(2)主要用于缓解环境污染和生产高附加值化学品,如环状碳酸酯,因此,实现CO_(2)高容量捕获具有较好的科学价值和研究意义。本工作采用来源广泛、廉价易得的叶酸作为前驱体,以KOH为活化剂,通过碳化—活化法获得CO_(2)吸附性能优异的叶酸衍生多孔碳。首先,采用BET、SEM、SEM-EDS、XRD、Raman和XPS表征系统研究了叶酸衍生多孔碳的物性、纹理和结构特征。随后,通过1 bar 0℃和1bar 25℃的CO_(2)吸附实验评估了叶酸衍生多孔碳的CO_(2)吸附性能。最后,详细探究了叶酸衍生多孔碳的物化属性和多孔特性在CO_(2)吸附过程中所起的作用。在我国实施“碳中和、碳达峰”的背景下,本研究可为工业领域实现负碳汇目标提供技术和理论支持。
基金Supported by Ministry of Science and Technology Senior Foreign Expert Program,No.G2019028023 and No.G2020028007National College Student Innovation and Entrepreneurship Program,No.202210730172+1 种基金Medical Innovation and Development Project of Lanzhou University,No.lzuyxcx-2022-99Joint Research Fund Project of Gansu Province,No.23JRRA1496.
文摘BACKGROUND The continuous development of social and economic progress and ongoing enhancement of infrastructure construction has led to drastic changes in the occurrence of trauma.AIM To analyze the epidemiological characteristics of trauma in Lanzhou City to provide theoretical references for improving quality of trauma care.METHODS A retrospective analysis of clinical data from 16585 trauma patients treated at the First Hospital of Lanzhou University Trauma Center from November 1,2021 to October 31,2023 was conducted.Data including age,sex,time of trauma,cause of trauma,and major injured body parts were statistically analyzed.RESULTS A total of 18235 patients were admitted,with complete data for 16585 cases.Of these,9793 were male and 6792 were female(male-to-female ratio of 1.44:1).The peak times for trauma occurrence were 10 AM-12 PM and 6-10 PM,and the peak months were from May to October.The leading causes of trauma were falls(45.32%),other trauma(15.88%),road traffic accidents(15.15%),violence(10.82%),cutting/stabbing(9.41%),mechanical injuries(2.65%),winter sports injuries(0.36%),animal bites(0.22%),burns(0.09%),and electrical injuries(0.02%).The distribution of majorly injured body parts showed statistical significance,with limbs/skin being the most affected followed by the head/neck,chest/abdomen,and back.CONCLUSION Medical institutions and government agencies can implement preventive measures and policies based on the characteristics of trauma determined in this study to enhance the quality and level of trauma care.
基金the Health and Wellness Commission of Hebei Province,No.20160344the Health Commission of Shijiazhuang City,Hebei Province,No.221200763.
文摘BACKGROUND Acute lower extremity deep venous thrombosis(LEDVT)is a common vascular emergency with significant morbidity risks,including post-thrombotic syndrome(PTS)and pulmonary embolism.Traditional treatments like catheter-directed thrombolysis(CDT)often result in variable success rates and complications.AIM To investigate the therapeutic efficacy of percutaneous mechanical thrombus removal in acute LEDVT.METHODS A retrospective analysis was performed to examine 58 hospitalised patients with acute LEDVT between August 2019 and August 2022.The patients were categorised into the percutaneous mechanical thrombectomy(PMT)group(n=24)and CDT group(n=32).The follow-up,safety and treatment outcomes were compared between the two groups.The main observational indexes were venous patency score,thrombus removal effect,complications,hospitalisation duration and PTS.RESULTS The venous patency score was 9.04±1.40 in the PMT group and 8.81±1.60 in the CDT group,and the thrombus clearance rate was 100%in both groups.The complication rate was 8.33%in the PMT group and 34.84%in the CDT group,and the difference was statistically significant(P<0.05).The average hospitalisation duration was 6.54±2.48 days in the PMT group and 8.14±3.56 days in the CDT group.The incidence of PTS was lower in the PMT group than in the CDT group;however,the difference was not statistically significant(P<0.05).CONCLUSION Compared with CDT,treatment of LEDVT via PMT was associated with a better thrombus clearance rate,clinical therapeutic effect and PTS prevention function,but the difference was not statistically significant.Moreover,PMT was associated with a reduced urokinase dosage,shortened hospitalisation duration and reduced incidence of complications,such as infections and small haemorrhages.These results indicate that PMT has substantial beneficial effects in the treatment of LEDVT.
基金supported by the National Social Science Fund of China(NSSFC)(Grant No.21CJL027)Think-tank Project for Industrial and Regional Development of the Chinese Academy of Social Sciences(CASS)(Grant No.GJSZKB202312)Key Discipline of the Peak Strategy of CASS(Regional Economics)(Grant No.DF2023ZD24).
文摘Advances in digital technology and vast data applications have resulted in the emergence of the digital economy paradigm,which is a new techno-economic paradigm for the digital economy age.Under this paradigm,the industrial organization has shifted toward networked,platform-based,boundaryless,and integrated development with new characteristics.Specifically,there has been a fierce“positional arms race”fueled by financial capital,accelerating the growth of platform companies.The“hierarchical monopolistic competition”market structure has taken shape,resulting in a“coexistence without disruption”monopolistic competition.As platform businesses expand into new business sectors,competition among industrial ecosystems intensifies.Data and algorithms have become secret weapons for corporate success,allowing platform companies to expand their monopolistic forces.Industrial organization in the digital era has revolutionized the operating rules and logic of industrial economy,giving rise to new industries,business models,and paradigms,as well as being conducive to international cooperation and intelligent regulation.Meanwhile,it has introduced new challenges to socioeconomic development,making platform companies’anti-competitive and monopolistic behaviors more implicit,privacy and security concerns more conspicuous,and antitrust identification and investigation more difficult.The government should embrace the evolving trends of industrial organization in the digital economy era,accelerate regulatory transition,and strengthen governance and regulation under the digital economy paradigm.
文摘目的 探讨肝硬化合并糖尿病患者发生低血糖的原因及临床指标的特点。方法 选取首都医科大学附属北京佑安医院2017年1月-2019年6月收治的肝硬化合并糖尿病患者共50例为研究对象,其中发生1次低血糖的25例为试验组,未发生低血糖的25例为对照组。对两组患者肝肾功能、空腹血糖、糖化血红蛋白及Child-Pugh分级进行评估,并分析低血糖发生的时间段及可能原因。计量资料两组比较采用独立样本t检验或Mann-Whitney U检验,计数资料两组间比较采用χ2检验。结果 试验组空腹血糖明显低于对照组[6.10(3.45~8.96)mmol/L vs 8.12(6.18±12.59)mmol/L, Z=-2.687, P=0.007],ChE明显低于对照组[3009.00(1788.50~4493.50)U/L vs 4936.00(4051.00~6740.50)U/L, Z=-3.095, P=0.002],Alb明显低于对照组[(32.02±7.07)g/L vs (35.89±5.49)g/L, t=2.161,P=0.036],糖化血红蛋白明显低于对照组[(6.97±1.64)mmol/L vs (8.04±1.78)mmol/L,t=2.047,P=0.047]。试验组Child-Pugh分级以B级(36%)及C级(36%)为主,对照组以A级(56%)及B级(40%)为主,两组Child-Pugh分级差异有统计学意义(χ^2=8.786,P=0.012)。肝硬化合并糖尿病患者大部分低血糖发生在晨起空腹及白天,原因以胰岛素过多(44%)及进食或热量补充不足(40%)为主,部分患者有空腹无症状性低血糖(16%)。结论 临床上应重视肝硬化合并糖尿病患者的血糖监测及管理,减少低血糖事件的发生。
