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光储一体化变流器并联系统的功率协调控制 被引量:2
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作者 张权宝 唐芬 +1 位作者 陶庭欢 徐金城 《电力电子技术》 CSCD 北大核心 2022年第9期70-73,共4页
为实现光储一体化变流器并联系统在离网时各单元光伏(PV)剩余能量的充分利用,提出一种功率协调控制策略。首先,分析了系统运行的各类工况及控制目标,其次,阐述了所提策略功率协调原理,通过在光伏和交流侧(AC)下垂环节引入直流(DC)母线... 为实现光储一体化变流器并联系统在离网时各单元光伏(PV)剩余能量的充分利用,提出一种功率协调控制策略。首先,分析了系统运行的各类工况及控制目标,其次,阐述了所提策略功率协调原理,通过在光伏和交流侧(AC)下垂环节引入直流(DC)母线电压箝位控制(BVCC),直流电压的控制权在储能侧DC/DC、交流侧DC/AC和光伏侧DC/DC间平滑过渡,实现光伏剩余功率单元向剩余可充电功率单元提供协调功率,从而实现并联系统各工况下光伏剩余功率的充分利用。最后,仿真与实验结果表明,所提控制策略可充分利用各单元光伏剩余能量,并具有较好的动稳态特性。 展开更多
关键词 光储一体化变流器 交流微网 下垂环节
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Therapeutic effects of endoscopic therapy combined with enteral nutrition on acute severe biliary pancreatitis 被引量:22
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作者 ZHOU Wen-ce LI Yu-min +6 位作者 zhang Hui LI Xun zhang Lei MENG Wen-bo ZHU Ke-xiang zhang quan-bao HE Min-yan 《Chinese Medical Journal》 SCIE CAS CSCD 2011年第19期2993-2996,共4页
Background Acute severe biliary pancreatitis (ASBP) is a severe and fatal disease, and the expenditure is huge and therapeutic effects are still not satisfactory. This study aimed to improve the therapeutic effects ... Background Acute severe biliary pancreatitis (ASBP) is a severe and fatal disease, and the expenditure is huge and therapeutic effects are still not satisfactory. This study aimed to improve the therapeutic effects and reduce the expenditure of ASBP treatment.Methods One hundred and five patients diagnosed with ASBP were referred to our department from January 2004 to July 2009. Diagnosis was based on the 2007 criteria of the Chinese Society of Surgery. Patients were divided into two groups; the E group: 50 patients who underwent endoscopic retrograde choledochopancreatography (ERCP) + endoscopic sphincterotomy (EST) + endoscopic lithotripsy basket (ESR) +endoscopic retrograde biliary drainage (ERBD)and enteral nutrition (EN), and the R group: 55 patients who underwent traditional treatment without ERCP. Subsequently,subjective symptoms, signs, biochemical analysis, serum endotoxin, tumor necrosis factor a, grades by computed tomography (CT), cost of hospitalization and length of stay were compared between the two groups.Results All enrolled patients complied well with all therapeutic regimens. Endoscopic therapy that combined EN could significantly improve symptoms, clinical signs, laboratory values, tumor necrosis factor a and endotoxin while significantly reducing hospital expenditure and length of hospital stay. The experimental findings revealed that there were obvious advantages in the E group compared with the R group.Conclusions Endoscopic therapy combined with EN is an effective, safe and economic therapeutic regimen of ASBP. 展开更多
关键词 ENDOSCOPY enteral nutrition acute severe biliary pancreatitis therapeutic regimen
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Primary hyperparathyroidism presenting as acute gallstone pancreatitis 被引量:5
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作者 HE Jian-hong zhang quan-bao +3 位作者 LI Yu-min ZHU You-quan LI Xun SHI Bin 《Chinese Medical Journal》 SCIE CAS CSCD 2010年第10期1351-1352,共2页
Primary hyperparathyroidism (PHPT) is a generalized disorder of calcium metabolism resulting from an abnormally high level of serum calcium and an increased level of parathormone (PTH). 1,2 Traditionally, symptoma... Primary hyperparathyroidism (PHPT) is a generalized disorder of calcium metabolism resulting from an abnormally high level of serum calcium and an increased level of parathormone (PTH). 1,2 Traditionally, symptomatic PHPT patients present with a variety of disorders including fatigue, amyotrophy, memory impairment, emotional instability, hallucination, irritation, loss of consciousness, abdominal distention, nausea, 展开更多
关键词 primary hyperparathyroidism hypercalcaemic crisis acute pancreatitis
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Cyclooxygenase-2 promoter polymorphism -899G/C is associated with hepatitis B-related liver cancer in a Chinese population of Gansu province 被引量:2
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作者 HE Jian-hong LI Yu-min +6 位作者 zhang quan-bao REN Zhi-jian LI Xun ZHOU Wen-ce zhang Hui MENG Wen-bo HE Wen-ting 《Chinese Medical Journal》 SCIE CAS CSCD 2011年第24期4193-4197,共5页
Background Hepatitis B virus infection is closely related to hepatocellular carcinoma (HCC). Cyclooxygenase-2 (COX-2) is overexpressed in HCC and considered to play a role in hepatic carcinogenesis. In this study,... Background Hepatitis B virus infection is closely related to hepatocellular carcinoma (HCC). Cyclooxygenase-2 (COX-2) is overexpressed in HCC and considered to play a role in hepatic carcinogenesis. In this study, we analyzed the polymorphism of COX-2 promoter -899G/C in healthy controls, chronic hepatitis B (CHB) patients, liver cirrhosis patients, and hepatocellular carcinoma (HCC) patients, to investigate the relationship between COX-2 -899G/C polymorphism and the risk for hepatitis B-related liver cancer in a Chinese population from Gansu province. Methods Patients were divided into four groups: 300 patients with CHB, 300 patients with liver cirrhosis, 300 patients with HCC, and 300 healthy controls. The polymorphism of COX-2 -899G/C was detected by PCR-TaqMan probes. The results were analyzed by SPSS 17.0. Results The COX-2 -899G/C genotypes were GG, GC, and CC. Frequencies in CHB were 87.00%, 12.67%, 0.33%; in liver cirrhosis were 85.33%, 14.00%, 0.67%; in HCC were 77.00%, 21.67%, 1.33%; and in healthy controls were 90.67%, 9.00%, 0.33%, respectively. COX-2 -899C carriers may have an increased risk for hepatitis B-related liver cancer. Compared with the frequency of GG genotype, there were significant differences in the frequency of GC genotype between HCC and healthy control groups (0R=2.835, 95%C/: 1.751-4.589); HCC and CHB groups (OR=1.933, 95%C/: 1.248-2.994); and HCC and liver cirrhosis groups (OR=1. 175, 95%C/: 1.119-2.628). Stratification analyses showed that COX-2 -899C allele carriers with a drinking history are more susceptible to develop HCC. Conclusion COX-2 -899C genotype may increase the susceptibility of individuals to hepatitis B-related liver cancer in Gansu province, China. 展开更多
关键词 CYCLOOXYGENASE-2 POLYMORPHISMS hepatitis B-related liver cancer
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不同吻合方法在肝移植胆道重建中应用研究 被引量:1
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作者 陶一峰 李瑞东 +5 位作者 沈丛欢 马震宇 张晓飞 张全保 金嫣婷 王正昕 《临床军医杂志》 CAS 2018年第11期1334-1336,1339,共4页
目的探讨公民逝世后器官捐献的成人肝移植术中胆道连续与间断吻合方法对胆道并发症发生率的影响。方法回顾性分析自2015年1月至2016年12月在复旦大学附属华山医院完成的长期存活、术中实施胆管-胆管端端吻合的135例成人肝移植患者的临... 目的探讨公民逝世后器官捐献的成人肝移植术中胆道连续与间断吻合方法对胆道并发症发生率的影响。方法回顾性分析自2015年1月至2016年12月在复旦大学附属华山医院完成的长期存活、术中实施胆管-胆管端端吻合的135例成人肝移植患者的临床资料。根据吻合方式将患者分为常规组(n=61)和观察组(n=74)。常规组采用6-0 MAXON缝线后壁连续+前壁间断缝合;观察组采用7-0 MAXON缝线后壁+前壁连续缝合。随访12~24个月,比较两组患者术后胆道并发症的发生情况及胆道重建耗时。结果术后早期胆道并发症主要表现为吻合口胆漏和吻合口狭窄引起的阻塞性黄疸。常规组的早期胆道并发症发生率为4. 9%(3/61),略高于观察组的1. 3%(1/74),但两组比较,差异无统计学意义(P>0. 05)。术中长期胆道并发症主要表现为吻合口狭窄、非吻合口缺血性狭窄和胆道结石/胆泥形成等。常规组的长期胆道并发症发生率为9. 8%(6/61),略高于观察组的6. 7%(5/74),但两组比较,差异无统计学意义(P> 0. 05)。常规组胆道重建耗时为(26. 9±3. 1)min,明显长于观察组的(11. 1±3. 0)min,组间比较,差异有统计学意义(P <0. 05)。结论肝移植胆道重建中采用后壁+前壁连续缝合方法可缩短手术时间,且不增加胆道并发症发生率,不影响受体术后生存质量。 展开更多
关键词 公民死亡后器官捐献 肝移植 胆道并发症 胆道吻合
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