检索结果-南通市图书馆

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

驱油用乳液聚合物性能评价与现场试验

石油学报 2024年第6期45卷 976-987页

作者：王正茂韩旭潘峰樊宇阎逸群周小松李诚中国石油油气和新能源分公司北京100007 中国石油勘探开发研究院北京100086 提高油气采收率全国重点实验室北京100086 大庆油田有限责任公司勘探开发研究院黑龙江大庆163712 大庆油田有限责任公司第六采油厂黑龙江大庆163114

大庆油田清配污稀干粉聚合物(P-HPAM)比清配清稀增加聚合物用量40%~65%,致使聚合物驱技术效果变差,经济效益下滑。同时,配制干粉聚合物耗时较长,地面设施投资高。因此,降低聚合物用量,改善聚合物驱技术效果,快速分散、溶解,降低地面设... 详细信息

大庆油田清配污稀干粉聚合物(P-HPAM)比清配清稀增加聚合物用量40%~65%,致使聚合物驱技术效果变差,经济效益下滑。同时,配制干粉聚合物耗时较长,地面设施投资高。因此,降低聚合物用量,改善聚合物驱技术效果,快速分散、溶解,降低地面设施投资,对聚合物驱提质增效显得尤为重要。通过系统评价乳液聚合物(E-AM/AA/AMPS)的理化性能和驱油效果,并与干粉聚合物(P-HPAM)进行对比的结果表明,乳液聚合物增黏性、黏度稳定性、抗剪切性、界面性能和乳化性能等优于干粉聚合物。采用清配污稀方式,在聚合物质量浓度为1600 mg/L、用量为960 mg/L条件下,天然岩心驱油实验乳液聚合物驱提高采收率为18.8%(以原始地质储量计),比干粉聚合物驱提高6.9%(以原始地质储量计)。在提高采收率值约为13%(以原始地质储量计)时,乳液聚合物比干粉聚合物降低聚合物用量1080 mg/L。同时,乳液聚合物20 min即可完全溶解,是干粉聚合物溶解时间的1/4,并可实现在线熟化,简化配注工艺流程。目前,乳液聚合物驱油现场试验已见到显著的增油降水效果。

关键词：乳液聚合物聚合物驱实验室研究现场试验提高采收率

在线全文

学校读者我要写书评

暂无评论

寻美曲阜孔庙——孔庙建筑艺术性分析

走进孔子（中英文） 2024年第2期 49-53页

作者：燕一群曲阜市美术家协会

曲阜孔庙是祭祀孔子的祠庙,始建于孔子死后第二年,即公元前478年。之后两千余年间,不断增修扩建,终形成现在的规模。作为全国规模最大的文庙,曲阜孔庙曾被著名建筑学家梁思成评价为“世界建筑史上的孤例”。中国文物学会会长单霁翔表示... 详细信息

曲阜孔庙是祭祀孔子的祠庙,始建于孔子死后第二年,即公元前478年。之后两千余年间,不断增修扩建,终形成现在的规模。作为全国规模最大的文庙,曲阜孔庙曾被著名建筑学家梁思成评价为“世界建筑史上的孤例”。中国文物学会会长单霁翔表示,孔庙规模之大,延续时间之长,其生生不息的气魄,实际上是中国古代建筑的一个大百科全书。孔庙有着极其厚重的人文、历史价值。下面,我们将走进曲阜孔庙,解读孔庙之美。

关键词：中国古代建筑建筑学家延续时间孔庙梁思成中国文物学会世界建筑史第二年

新型口服抗凝剂治疗癌症患者静脉血栓栓塞有效性及安全性的Meta分析

在线全文

学校读者我要写书评

暂无评论

中国药房 2024年第7期35卷 842-847页

作者：王祖秀李旭欢尤培蒙朱挺德陈黎旭燕肄群潘永平南昌大学第四附属医院全科医学科南昌330003 江西省肿瘤医院胸部肿瘤放疗科南昌330029 江西省肿瘤医院全科医学科南昌330029

目的系统评价癌症相关静脉血栓栓塞(VTE)患者使用新型口服抗凝剂(NOAC)的有效性和安全性。方法检索PubMed、Cochrane Library、Embase、Web of Science、中国知网、万方数据库,检索时限为各数据库建库起至2023年8月,收集低分子肝素(LMWH... 详细信息

目的系统评价癌症相关静脉血栓栓塞(VTE)患者使用新型口服抗凝剂(NOAC)的有效性和安全性。方法检索PubMed、Cochrane Library、Embase、Web of Science、中国知网、万方数据库,检索时限为各数据库建库起至2023年8月,收集低分子肝素(LMWH,对照组)对比NOAC(试验组)治疗癌症相关VTE患者疗效的随机对照试验(RCT),对纳入临床研究进行资料提取后,采用RevMan 5.0统计软件进行Meta分析。结果共计纳入7项RCT,合计3790例癌症相关VTE患者。与对照组相比,试验组患者的VTE复发率(RR=0.65,95%CI为0.51~0.82,P=0.0004)显著降低,而其大出血发生率略高于对照组,但差异无统计学意义(RR=1.13,95%CI为0.83~1.53,P=0.45)。试验组患者的临床相关非主要大出血(RR=1.69,95%CI为1.34~2.13,P0.05)。结论对于癌症相关VTE患者,NOAC在预防VTE复发方面优于LMWH,在大出血、颅内出血、全因死亡、致死性肺栓塞方面不劣于LMWH。

关键词：癌症静脉血栓栓塞抗凝药低分子肝素新型口服抗凝剂

Do investors care about auditor assignments?Evidence from last-minute changes to signing auditors

在线全文

学校读者我要写书评

暂无评论

China Journal of Accounting Research 2024年第1期17卷 132-156页

作者： yangyang Wang yiqun Xie Huanmin yan Rui Zhang School of Accounting Jiangxi University of Finance and EconomicsNanchangChina School of Economics&Management Nanchang UniversityNanchangChina

Against the background of China’s strengthening of finance and accounting supervision,this study examines the practice among listed companies of changing signing auditors at the last minute and explores whether Chinese investors can capture this information in a timely *** find that China’s capital market responds significantly negatively to these last-minute changes,implying that investors perceive a potential negative impact of this *** analyses suggest that the characteristics of the change event,recent corporate events,and accounting firm capability significantly affect the stock price ***,in terms of the individual characteristics of signing auditors,external investors appear to comprehensively consider busyness level,industry experience,and the timing of the change to determine the causes and effects of the auditor change and make different market reactions *** addition,consistent with investor perceptions,we find that last-minute changes significantly impair the quality of financial statements,indicating that external investors’judgments based on information about changes in signing auditors are rational and effective.

关键词： Annual Financial Report Auditing Changing Signing Auditors at the Last Minute Market Response Financial Statement Quality

Self-supported NiFe-LDH nanosheets on NiMo-based nanorods as high-performance bifunctional electrocatalysts for overall water splitting at industrial-level current densities

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第5期17卷 3769-3776页

作者： yan Zhang Biao Feng MingLei yan Zhen Shen yiqun Chen Jingyi Tian Fengfei Xu Guanghai Chen Xizhang Wang Lijun yang Qiang Wu Zheng Hu Key Laboratory of Mesoscopic Chemistry of Ministry of Education(MOE)and Jiangsu Provincial Lab for Nanotechnology School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China College of Water Conservancy and Hydropower Engineering Sichuan Agricultural UniversityYa’an 625014China

Efficient,durable and economic electrocatalysts are crucial for commercializing water electrolysis ***,we report an advanced bifunctional electrocatalyst for alkaline water splitting by growing NiFe-layered double hydroxide(NiFe-LDH)nanosheet arrays on the conductive NiMo-based nanorods deposited on Ni foam to form a three-dimensional(3D)architecture,which exhibits exceptional performances for both hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).In overall water splitting,only the low operation voltages of 1.45/1.61 V are required to reach the current density of 10/500 mA·cm^(-2),and the continuous water splitting at an industrial-level current density of 500 mA·cm^(-2) shows a negligible degradation(1.8%)of the cell voltage over 1000 *** outstanding performance is ascribed to the synergism of the HER-active NiMo-based nanorods and the OER-active NiFe-LDH nanosheet arrays of the hybridized 3D ***,the dense NiFe-LDH nanosheet arrays enhance the local pH on cathode by retarding OH-diffusion and enlarge the electrochemically active surface area on anode,while the conductive NiMo-based nanorods on Ni foam much decrease the charge-transfer resistances of both *** study provides an efficient strategy to explore advanced bifunctional electrocatalysts for overall water splitting by rationally hybridizing HER-and OER-active components.

关键词： alkaline water splitting bifunctional electrocatalysts layered double hydroxides high durability industrial current densities

Prognostic analysis of patients suffering from intrahepatic cholangiocarcinoma

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Chinese-German Journal of Clinical Oncology 2011年第3期10卷 150-152页

作者： Zhong Chen Jianjun yan Liang Huang yiqun yan Department of Hepatobiliary Surgery Jinan Military Hospital Jinan 250031 China Department of Hepatic Surgery Eastern Hepatobiliary Surgery Hospital Second Military Medical University Shanghai 200438 China

Objective： The outcome of surgical treatment of patients with intrahepatic cholangiocarcinoma （ICC） is poor. This study was designed to analyze prognostic factors after surgical procedure for ICCs. Methods： A retrospective clinical analysis was made in 183 cases of ICC, admitted to Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China, from December 1996 to July 2003. Fifteen clinicopathologic factors that could possibly influence survival were selected. A multivariate analysis of these individuals was performed using the Cox Proportional Hazards Model. Results： The accumulative 1-, 3-and 5-year survival rates of the patients were 51.3%, 21.6% and 11.8% respectively. The statistical analysis showed that surgical procedure, lymph node metastasis, serum level of CA19-9 and pathological differentiation grade affected postoperative survival significantly, but transfusion, postoperative radiotherapy and chemotherapy, diameter of tumor, serum level of AFP, cirrhosis, preoperative total serum bilirubin level （TBIL）, ratio of albumin to globulin （A/G）, sex and age were not significant factors influencing postoperative survival. Conclusion： Major hepatectomy with systematic lymph node dissection may be recommended for the surgical treatment of ICC. Aggressive treatment and prevention on postoperative intrahepatic recurrence and lymph node metastasis are important strategy to improve the survival for ICC.

关键词： intrahepatic cholangiocarcinoma (ICC) surgical procedures operative prognosis

Reactivation of hepatitis C virus replication in a patient undergoing hepatectomy for hepatocellular carcinoma

在线全文

学校读者我要写书评

暂无评论

Journal of Medical Colleges of PLA(China) 2012年第5期27卷 306-310页

作者： Liu Caifeng Li Jing Huang Liang yan yiqun Department of Hepatic Surgery Eastern Hepatobiliary Surgery HospitalSecond Military Medical UniversityShanghai 200438China

*** Hepatocellular carcinoma (HCC) is one of the most common neoplasms encountered,and its incidence is increasing worldwide because of the increasing prevalence of hepatitis B virus (HBV) and hepatitis C virus (HCV) infection [1,2].Patients with HBV or HCV-related HCC suffer not only from malignancy but also chronic virus *** follows that treatments for HCC could also affect the activity of virus replication,a factor that has important implication for hepatitis *** previous studies [3,4],high incidences (28％ and 21％ respectively) of HBV reactivation were observed in HBV-related HCC patients undergoing liver *** far,there have been very few reports concerning reactivation of HCV replication in HCV-related HCC patients undergoing liver *** we present the case of a patient with HCV-related HCC underwent liver resection and experienced postoperative liver failure duo to HCV reactivation.

关键词：丙型肝炎病毒病毒复制切除术癌病 C型激活恶性肿瘤病毒感染

Treatment Strategy for Post-Hepatectomy Recurrent Hepatocellular Carcinoma: A Single Center Experience with 556 Consecutive Cases in China

在线全文

学校读者我要写书评

暂无评论

Journal of Cancer Therapy 2020年第7期11卷 389-400页

作者： Jing Li Liang Huang Caifeng Liu Maixuan Qiu Jianjun yan Shaohua Wei yiqun yan Department of General Surgery The Second Affiliated Hospital of Soochow University Suzhou China Department of Hepatic Surgery Shanghai Eastern Hepatobiliary Surgery Hospital Shanghai China

Background: Treatment strategy for recurrent hepatocellular carcinoma (HCC) remains scantily defined. This study was aimed to establish a treatment strategy to manage post-hepatectomy recurrent HCC and report the clinical outcomes. Methods: From January 2006 to December 2016, 556 consecutive patients who developed post-hepatectomy HCC recurrence were enrolled in the study. The patients were clinically stratified and treated according to a strategy established by a multi-disciplinary team. Clinical data and survival times were collected prospectively and analyzed retrospectively. Results: According to the strategy, there were 298 (53.6%), 214 (38.5%), 32 (5.7%) and 12 (2.2%) patients stratified into Early, Intermediate, Advanced and Terminal stages, respectively. In Early stage patients, 164 (55.0%) received curative treatment in the form of repeat resection or local ablation, 134 (45.0%) received transarterial chemoembolization (TACE), and the 1-, 3-, and 5-year overall survival (OS) rates were 82.0%, 46.8% and 37.3%, respectively. In Intermediate stage patients, 207 (96.7%) received TACE, 7 (3.3%) radiotherapy, and the 1-, 3-, and 5-year OS rates were 73.2%, 31.8% and 15.9%, respectively. In Advanced stage patients, 22 patients received sorafenib, 10 radiotherapy, and the mean survival time (MST) was 25.1 ± 3.1 months. All the 12 patients in Terminal stage received the best supportive treatment, and the MST was 6.5 ± 3.4 months. Clinical stages and duration of disease-free interval were independent factors relating to overall survival. Conclusions:

关键词： Post-Hepatectomy Recurrent Hepatocellular Carcinoma Clinical Classification Treatment Strategy Clinical Outcomes

Evolution of the Mangrove Wetland since the Holocene:Current Progress and Future Perspectives

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Earth Science 2024年第5期35卷 1669-1678页

作者： Xueyan yan Xianzhong Ke Qinghua Li yiqun Gan Xianjun Xie Yamin Deng Geological Survey China University of GeosciencesWuhan 430074China Wuhan Center China Geological Survey(Central South China Innovation Center for Geosciences)Wuhan 430205China School of Environmental Studies China University of GeosciencesWuhan 430074China

Mangrove wetlands are among the four most productive tropical and subtropical *** are also a core component of the coastal blue carbon ecosystem,which is of great ecological significance to human beings,plants,animals,and the global carbon *** has been a global decrease in the distribution of mangrove forests,and their ecological function has gradually degenerated since the *** from coastal mangrove wetlands can provide records of climate change and human activities,and multiple proxies including palynology,leaf fossil,biomarkers,DNA,phytolith and stable isotopes,can be used to reconstruct the evolutionary stages of paleo-mangroves and to identify the effect of natural processes and human activities on the distribution and evolution of *** information can provide theoretical support for mangrove protection and for improving carbon sequestration *** paper summarizes and compares the multiple proxies for mangrove reconstruction,reviews progress in the study of natural succession of global mangroves since the Holocene,expands on the influence mechanisms of human activities on mangrove growth and development and uses past information to lay a foundation for a model to predict future mangrove development.

关键词： mangrove Holocene multiproxy sedimentary environment climate change environ-mental geology