期刊文献+
共找到111,582篇文章
< 1 2 250 >
每页显示 20 50 100
Cross-sectional Seroprevalence and Genotype of Hepatitis E Virus in Humans and Swine in a High-density Pig-farming Area in Central China
1
作者 Yilin Shu Yameng Chen +7 位作者 Sheng Zhou Shoude Zhang Qin Wan Changcai Zhu Zhijiang Zhang Hailong Wu Jianbo Zhan Ling Zhang 《中国病毒学:英文版》 CAS CSCD 2019年第4期367-376,共10页
Hepatitis E virus(HEV)infection is a common public health problem in developing countries.However,the current prevalence of HEV and the relationship of HEV genotype between swine and human within high-density pig-farm... Hepatitis E virus(HEV)infection is a common public health problem in developing countries.However,the current prevalence of HEV and the relationship of HEV genotype between swine and human within high-density pig-farming areas in central China are still inadequately understood.Here,cross-sectional serological and genotypic surveys of HEV among the 1232 general population,273 workers occupationally exposed to swine,and 276 pigs in a high-density pig-breeding area,were undertaken by ELISA and nested RT-PCR methods.Anti-HEV IgG was detected in 26.22%of general population and 48.35%of occupational workers.The prevalence of swine serum HEV-Ag was 6.52%.The prevalence of anti-HEV IgG was significantly higher among the workers occupationally exposed to swine than among the general population.An increased HEV seropositivity risk among the general population was associated with either being a peasant or male and was very strongly associated with the increase of age.Among the occupationally exposed group,the prevalence of anti-HEV IgG antibodies increased with age and working years.Among the 30 HEV-IgM-positive people,the infection rates of clerks in the public,peasants,pork retailers,and pig farmers were higher than those of others.A phylogenetic analysis revealed that all the isolates belonged to subgenotype 4d,and four people and four pigs shared 97.04%-100%sequence homology.This study revealed a high HEV seroprevalence among the general population and workers occupationally exposed to swine in the Anlu City,and supports the notion that swine are a source of human HEV infection. 展开更多
关键词 Hepatitis E virus(HEV) Seroepidemiological STUDY ZOONOSIS CROSS-SECTIONAL STUDY GENOTYPE
The effect of long-term traditional Chinese medicine treatment on disease-free survival of postoperative stage I-III lung cancer patients:a retrospective cohort study 预览
2
作者 Su-Tong Liu Su-Fang Zhang +6 位作者 Kai-Qi Su Ying-Bin Luo Zhi-Hong Fang Yuan Fang Jing Xu Jian-Chun Wu Yan Li 《TMR传统医学研究》 2019年第2期91-98,共8页
Objective:Traditional Chinese medicine(TCM)has been extensively used as one of popular alternative therapies for several cancers.However,it remains unclear whether TCM treatment is associated with longer survival in l... Objective:Traditional Chinese medicine(TCM)has been extensively used as one of popular alternative therapies for several cancers.However,it remains unclear whether TCM treatment is associated with longer survival in lung cancer patients.In this study,we explored the effect of long-term TCM treatment on patients with different stages of lung cancer.Methods:All information of lung cancer patients with stage I-III disease from January 2007 to September 2015 was collected for this retrospective cohort study.Those who were treated with TCM after surgery were divided into TCM group and the others were into the non-TCM group(control group).All patients were regularly followed up by clinic appointment or phone,and all survival data were collected from databases after the last follow-up in October 2017.Results:A total of 575 patients were included in this study,with 299 patients in the TCM group and 276 in the control group.For all patients,5-year disease-free survival(DFS)was 62.2% in TCM group and 42.1% in the control group,and 6-year DFSs were 51.8% and 35.4%,respectively(HR=0.51,95% CI:0.40 to 0.66,log-rank P≤0.001).For patients with stage I,5-year DFSs were 83.7%(TCM group)and 57.5%(control group)and 6-year DFSs were 73.7% and 51.9%,respectively(HR=0.30,95% CI:0.18 to 0.50,log-rank P≤0.001).For patients with stage II in the TCM group and the control group,5-year DFSs were 59.4% and 17.6% and 6-year DFSs were 44.7% and 17.6%,respectively(HR=0.31,95% CI:0.19 to 0.52,log-rank P≤0.001),and for patients with stage III,5-year and 6-year DFSs in the TCM group were 18.7% and 12.5% compared with 28.4% and 20.3% in the control group(HR=1.06,95% CI:0.72 to 1.56,log-rank P=0.76).Conclusions:This study demonstrated that long-term TCM treatment as an adjuvant therapy is able to improve the DFS of postoperative stage I-III lung cancer patients,especially in patients with stage I and II disease.However,these observational findings need being validated by large sample randomized controlled trials. 展开更多
关键词 TRADITIONAL Chinese medicine LUNG cancer Disease-free survival RETROSPECTIVE STUDY COHORT STUDY
在线阅读 下载PDF
Safety and efficacy of a docetaxel-5FU-oxaliplatin regimen with or without trastuzumab in neoadjuvant treatment of localized gastric or gastroesophageal junction cancer:A retrospective study 预览
3
作者 Valeria Basso David Orry +4 位作者 Jean Fraisse Julie Vincent Audrey Hennequin Leila Bengrine Francois Ghiringhelli 《世界胃肠肿瘤学杂志:英文版(电子版)》 CAS 2019年第8期634-641,共8页
BACKGROUND Triplet chemotherapy,with docetaxel-5FU-oxaliplatin FLOT regimen recently became the standard perioperative treatment for localized gastric cancer(GC).An adapted regimen called TeFOX was recently tested in ... BACKGROUND Triplet chemotherapy,with docetaxel-5FU-oxaliplatin FLOT regimen recently became the standard perioperative treatment for localized gastric cancer(GC).An adapted regimen called TeFOX was recently tested in metastatic setting and gave promising results.AIM To determine safety and efficacy of TeFOX perioperative regimen.METHODS This monocentric retrospective study aims to test efficacy and safety of the perioperative TeFOX regimen given alone or in combination with trastuzumab in patients with localized GC.TeFOX consist in docetaxel(50 mg/m^2)with oxaliplatin 85 mg/m^2 and and leucovorin(400mg/m^2^)5 FU bolus(400mg/m^2)on day 1,followed by continuous infusion of 5FU for 46h(2400mg/m^2)every 2 wk.RESULTS Thirty-three consecutive patients were included in this retrospective study.Eighteen patients have a gastroesophageal junction cancer and 11 have a GC.Median follow-up of surviving patients was 32 mo.R0 resection was obtained in 30(91)patients.Twelve patients(36)had a pathological complete response and 8(24)patients a nearly complete pathological response.Median OS and PFS were not reached at data base lock.We have observed 6 metastatic relapses and 1 localized relapse.No relapse was observed in patients with pathological complete responses.The most common grade 3-4 adverse events were peripheral neuropathy(21)and asthenia(20).CONCLUSION TeFOX regimen could be safely administrated in perioperative treatment of localized GC.TeFOX and the FLOT regimen have comparable efficacy and safety profiles. 展开更多
关键词 GASTRIC CANCER NEOADJUVANT chemotherapy TeFOX Retrospective study
在线阅读 免费下载
黑米黑色素的稳定性研究 预览
4
作者 张书瑜 杨锐铛 +5 位作者 刘榛 吴涵 陈雅芝 姜金婷 曹秋娥 马志刚 《云南大学学报:自然科学版》 CAS CSCD 北大核心 2019年第A01期72-75,共4页
以黑米为原料,采用超声波提取技术提取黑米黑色素,研究了水溶液中黑米黑色素在不同的pH值、光照、温度、还原剂、氧化剂、防腐剂和金属离子存在下的稳定性.结果表明,黑米黑色素在酸性环境下,在有Na+、Mg2+、Ca2+、Zn2+、Fe3+存在,和有... 以黑米为原料,采用超声波提取技术提取黑米黑色素,研究了水溶液中黑米黑色素在不同的pH值、光照、温度、还原剂、氧化剂、防腐剂和金属离子存在下的稳定性.结果表明,黑米黑色素在酸性环境下,在有Na+、Mg2+、Ca2+、Zn2+、Fe3+存在,和有还原剂、防腐剂和避光条件下,且温度低于60℃时,黑米黑色素的稳定性较好. 展开更多
关键词 黑米黑色素 稳定性 研究
在线阅读 下载PDF
统一社会信用代码校核及改进研究
5
作者 杨华 刘勇 《标准科学》 2019年第5期64-67,78共5页
数据校核是统一社会信用代码制度实施过程中的一个重要保障措施,通过计算机程序自动校核和人工校核相结合,能够发现问题数据,并通过“校核--纠错”机制进行纠正,从而维护统一社会信用代码的唯一、稳定属性,保证统一代码信息的准确、完... 数据校核是统一社会信用代码制度实施过程中的一个重要保障措施,通过计算机程序自动校核和人工校核相结合,能够发现问题数据,并通过“校核--纠错”机制进行纠正,从而维护统一社会信用代码的唯一、稳定属性,保证统一代码信息的准确、完整和时效。基于统一代码校核实践,举例解析了校核方法,分析了存在的问题,进行了改进思考,为统一代码校核的进一步优化提供了新思路。 展开更多
关键词 统一社会信用代码 校核 改进 研究
Production and stability study of a hospital parenteral nutrition solution for neonates 预览
6
作者 Anne-Laure Yailian Céline Serre +6 位作者 Justine Fayard Marina Faucon Patrick Thomaré Christine Pivot Florence Vételé Fabrice Pirot Emmanuelle Olivier 《药物分析学报:英文版》 CAS CSCD 2019年第2期83-90,共8页
Standard parenteral nutrition solutions are mixtures comprising interacting components that may degrade themselves over time.The objective of this study was to investigate the physicochemical and microbiological stabi... Standard parenteral nutrition solutions are mixtures comprising interacting components that may degrade themselves over time.The objective of this study was to investigate the physicochemical and microbiological stability of a hospital preparation for parenteral nutrition in neonatology.The analyses were performed throughout the storage of the preparations at 2–8℃(up to 4 months).The extent of stability was based on the determination of amino acids dosage,visual and physicochemical properties (glucose and electrolytes concentrations,pH and osmolality measurements,particle counting) and microbiological analysis (sterility test).A thermal degradation of ascorbic acid was conducted to evaluate the antioxidant properties of the parenteral mixture.Physicochemical and microbiological controls were found to comply with the specifications.Amino acids showed a good stability throughout the 4months storage except for cysteine,which was progressively degraded to cystine,conferring a yellow coloration to parenteral solutions.Parenteral nutrition standards solutions remain stable for 4 months at 2–8℃,ensuring safe administration in preterm infants. 展开更多
关键词 STABILITY-INDICATING method study PARENTERAL NUTRITION NEONATOLOGY Amino acids High-performance liquid CHROMATOGRAPHIC
在线阅读 下载PDF
自动化技术在电子信息工程中的应用与发展研究 预览
7
作者 杨建中 《无线互联科技》 2019年第16期138-139,共2页
文章介绍了自动化技术的概念、主要技术内容以及自动化技术在电子信息工程的应用意义,分析自动化技术在电子信息工程设计中的应用,以推动我国电子信息工程设计的自动化发展。
关键词 自动化技术 电子信息工程 应用与发展 研究
在线阅读 下载PDF
如何引导学生进行探究性学习 预览
8
作者 雷晓颖 《数码设计》 2019年第10期106-107,共2页
数学源于生活,生活中富有取之不尽用之不竭的数学知识,小学数学教学要紧密联系学生生活激发学习兴趣,发展研究效果,提高研究质量。教学有法,但没有定法,能够调动学生的学习积极性,大幅度提高学生的学习成绩,就是最好的教学方法。
关键词 引导 学生 研究 学习
在线阅读 免费下载
动车所信号系统设计方案研究 预览
9
作者 李钰龙 《铁路通信信号工程技术》 2019年第10期17-20,共4页
高速铁路不断发展,接入各枢纽的线路增多,既有动车所已不能满足运输要求,需要对动车所进行改扩建的情况越来越多。以实际工程为例,针对既有西宁动车所实际情况,进行信号系统改造方案研究。
关键词 动车所 改建 信号系统 研究
在线阅读 下载PDF
A Comparative Study on the Two Chinese Versions of The Apple Tree by John Galsworthy 预览
10
作者 JIAO Jing 《文学与艺术研究:英文版》 2019年第5期473-478,共6页
The author establishes parallel corpus of The Apple Tree by John Galsworthy and two translated Chinese versions by Huang Zixiang and Dong Hengxun.Wordsmith and ICTCLAS are applied to make a quantitative study on the l... The author establishes parallel corpus of The Apple Tree by John Galsworthy and two translated Chinese versions by Huang Zixiang and Dong Hengxun.Wordsmith and ICTCLAS are applied to make a quantitative study on the linguistic features of the source and the target language.A comparative study is made on the translation skills and styles of the two Chinese versions.Translation samples are analyzed and appreciated.It is concluded that the form and the literal meaning of the source language is retained more in Huang’s version while the implied meaning is conveyed more in Dong’s version,with more standard,fluent,and natural Chinese and more flexible sentence structures.The socio-cultural contexts of the two translators are also considered in analyzing their styles and translation choices. 展开更多
关键词 CORPUS The APPLE TREE COMPARATIVE study WORDSMITH ICTCLAS
在线阅读 下载PDF
我国传统美术图形语境下的品牌视觉设计研究 预览
11
作者 连晓君 《盐城工学院学报:社会科学版》 2019年第2期91-93,共3页
经济全球化为外来品牌的大量进入中国提供了契机,但以我国传统美术图形作为品牌视觉设计的形式在发展过程中逐渐失去了特色。随着品牌视觉设计需求的日新月异以及在图形设计语言探究方面的力度加强,以具有我国特色的美术图形为依据的视... 经济全球化为外来品牌的大量进入中国提供了契机,但以我国传统美术图形作为品牌视觉设计的形式在发展过程中逐渐失去了特色。随着品牌视觉设计需求的日新月异以及在图形设计语言探究方面的力度加强,以具有我国特色的美术图形为依据的视觉设计越来越受到人们的关注,因此,有必要对我国传统美术图形语境下的品牌视觉设计进行研究。 展开更多
关键词 传统美术图形 品牌视觉设计 研究
在线阅读 下载PDF
Dynamic Alterations in Spontaneous Brain Activity in Mothers:A Resting-State Functional Magnetic Resonance Imaging Study
12
作者 Kaihua Zhang Mengxing Wang +4 位作者 Jilei Zhang Junyao Xie Xueyun Su Xiaoxia Du Zhong Chen 《神经科学通报:英文版》 SCIE CAS CSCD 2019年第4期766-770,共5页
Becoming a mother is one of the most monumental experiences in a woman's lifetime. Women typically bear the primary caregiving responsibility for their infants, and they undergo numerous changes both mentally and ... Becoming a mother is one of the most monumental experiences in a woman's lifetime. Women typically bear the primary caregiving responsibility for their infants, and they undergo numerous changes both mentally and physically, including behavioral, emotional, and hormonal changes, during the postpartum period. Studies have indicated that hormonal, experiential, and temporal factors significantly regulate emotional and cognitive brain functions during the postpartum period [1]. The determination of the neural basis of a maternal brain is critically important for understanding mother-infant attachments and thus perpetuating the human species. Until recently, limited investigations of the neuroanatomical and functional status of mothers have contributed to understanding the processing of maternal behaviors. 展开更多
关键词 DYNAMIC Alterations SPONTANEOUS BRAIN ACTIVITY IMAGING STUDY
早产儿视网膜病变与母体因素的相关性研究 预览
13
作者 卢跃兵 孙爽 黄云云 《临床研究》 2019年第8期28-29,共2页
目的研究早产儿视网膜病变(ROP)与母体因素的相关性。方法选取2016年1月-2018年12月郑州大学附属儿童医院出生的早产儿320例,其中271例未发生视网膜病变,49例发生视网膜病变,将49例发生视网膜病变的患儿转至眼科收治,分析49例早产儿发... 目的研究早产儿视网膜病变(ROP)与母体因素的相关性。方法选取2016年1月-2018年12月郑州大学附属儿童医院出生的早产儿320例,其中271例未发生视网膜病变,49例发生视网膜病变,将49例发生视网膜病变的患儿转至眼科收治,分析49例早产儿发生视网膜病变的因素,与母体因素(胎盘异常、宫内感染)具有相关性。结果49例发生视网膜病变的早产儿中,宫内感染10例,宫内感染率20.41%;胎盘异常22例,异常率44.90%;母体妊娠期疾病(高血压或糖尿病)6例,基础疾病率12.24%;羊水异常2例,异常率4.08%;与未发生视网膜病变早产儿情况相比,宫内感染11例,宫内感染率4.06%;胎盘异常90例,异常率33.21%,母体妊娠期疾病(高血压或糖尿病)32例,基础疾病率11.81%;羊水异常3例,异常率4.43%;研究结果对比,宫内感染、胎盘异常比较差异显著(P<0.05);羊水异常与基础疾病比较无显著差异(P>0.05)。结论对比分析结果表明,ROP与母体因素宫内感染和胎盘异常具有正相关,宫内感染与胎盘异常更容易引发早产儿视网膜病变,而妊娠基础疾病高血压或糖尿病等疾病、羊水异常等与早产儿视网膜病变无相关性。 展开更多
关键词 早产儿 视网膜病变 母体因素 相关性 研究
在线阅读 下载PDF
绳梯训练法对轮滑选项课学生灵敏素质的影响研究 预览
14
作者 李小东 杨海娜 《教育教学论坛》 2019年第34期49-50,共2页
文章采用文献资料法、实验法、对照法、专家访谈法等对新疆农业大学轮滑选项课的大学生灵敏素质的影响进行专业、全面系统的研究,选取绳梯训练法,以期提高轮滑选项课学生的灵敏素质和技能,为高强度、高水平的轮滑教学打下基础。
关键词 绳梯训练 轮滑选项课 大学生 灵敏素质 研究
在线阅读 下载PDF
Trabecular-like Ti-6Al-4V scaffolds for orthopedic: fabrication by selective laser melting and in vitro biocompatibility
15
作者 Huixin Liang Youwen Yang +6 位作者 Deqiao Xie Lan Li Ning Mao Changjiang Wang Zongjun Tian Qing jiang Lida Shen 《材料科学技术学报:英文版》 SCIE EI CAS CSCD 2019年第7期1284-1297,共14页
Porous metal scaffolds play an important role in the orthopedic field, due to their wide applications in prostheses implantation. Some previous studies showed that the scaffolds with trabecular bone structure reconstr... Porous metal scaffolds play an important role in the orthopedic field, due to their wide applications in prostheses implantation. Some previous studies showed that the scaffolds with trabecular bone structure reconstructed via computed tomography had satisfactory biocompatibility. However, the reverse modeling scaffolds were inflexible for customized design. Therefore, a top-down designing biomimetic bone scaffold with favorable mechanical performances and cytocompatibility is urgently demanded for orthopedic implants. An emerging additive manufacturing technique, selective laser melting, was employed to fabricate the trabecular-like porous Ti-6Al-4 V scaffolds with varying irregularities(0.05-0.5) and porosities(48.83%–74.28%) designed through a novel Voronoi-Tessellation based method. Micro-computed tomography and scanning electron microscopy were used to characterize the scaffolds’ morphology.Quasi-static compression tests were performed to evaluate the scaffolds’ mechanical properties. The MG63 cells culture in vitro experiments, including adhesion, proliferation, and differentiation, were conducted to study the cytocompatibility of scaffolds. Compressive tests of scaffolds revealed an apparent elastic modulus range of 1.93–5.24 GPa and an ultimate strength ranging within 44.9–237.5 MPa, which were influenced by irregularity and porosity, and improved by heat treatment. Furthermore, the in vitro assay suggested that the original surface of the SLM-fabricated scaffolds was favorable for osteoblasts adhesion and migration because of micro scale pores and ravines. The trabecular-like porous scaffolds with full irregularity and higher porosity exhibited enhanced cells proliferation and osteoblast differentiation at earlier time, due to their preferable combination of small and large pores with various shapes. This study suggested that selective laser melting-derived Ti-6Al-4 V scaffold with the trabecular-like porous structure designed through Voronoi-Tessellation method, favorable mechanical performanc 展开更多
关键词 IRREGULAR porous structure Selective laser melting Voronoi-Tessellation Mechanical performance In VITRO study
大跨径桥面混凝土铺装层裂缝原因及处置研究 预览 被引量:1
16
作者 姚利郎 黄中峰 《山西交通科技》 2019年第2期38-41,共4页
通过大跨径桥面混凝土裂缝统计分析,从混凝土配合比、钢筋网位置控制、施工工艺、养生及收缩缝设置方面提出控制措施,对裂缝处置提出分类处理方案,建议在大跨连续刚构桥面混凝土中增加聚丙烯纤维,增设预切收缩缝。
关键词 大跨桥面 混凝土 裂缝处置 研究
在线阅读 下载PDF
工作面回采巷道煤柱侧向支承压力确定煤柱合理宽度研究 预览
17
作者 韩晓光 《山东煤炭科技》 2019年第2期73-75,共3页
以东曲矿 20103运输顺槽区段煤柱留设过宽为研究背景,通过现场侧向支承压力观测及理论分析的方法,得出该工作面煤柱塑性区宽度约为5m,中间弹性区域的宽度约为30m,超过了临界弹性核区范围,留设的煤柱宽度应适当减少。综合考虑各因素,将... 以东曲矿 20103运输顺槽区段煤柱留设过宽为研究背景,通过现场侧向支承压力观测及理论分析的方法,得出该工作面煤柱塑性区宽度约为5m,中间弹性区域的宽度约为30m,超过了临界弹性核区范围,留设的煤柱宽度应适当减少。综合考虑各因素,将该矿区段煤柱宽度缩减到 25m,现场应用,效果良好. 展开更多
关键词 煤柱 压力 规律 研究
在线阅读 下载PDF
中央歌剧院SRC梁浇筑过程中高大模板支架承担荷载比例研究 预览
18
作者 宗兆民 袁浩 +3 位作者 李舰舰 潘明栋 王福龙 谢楠 《施工技术》 CAS 2019年第5期123-127,共5页
以中央歌剧院剧场工程为背景,以浇筑期北侧屋面SRC梁及其高达33.43m的支撑体系为对象,从试验测试和理论分析2个方面对承担荷载比例进行研究。对屋面SRC梁中型钢的应变和模板支架中立杆的应变与变形进行测试,发现型钢参与受力,中部立杆... 以中央歌剧院剧场工程为背景,以浇筑期北侧屋面SRC梁及其高达33.43m的支撑体系为对象,从试验测试和理论分析2个方面对承担荷载比例进行研究。对屋面SRC梁中型钢的应变和模板支架中立杆的应变与变形进行测试,发现型钢参与受力,中部立杆承担的混凝土荷载不足按承载面积法计算值的40%;在理论分析方面,提出初凝状态屋面SRC梁及其支撑体系的有限元建模方法,将有限元结果与实测值进行对比,通过仿真计算获得型钢和模板支架各自分担混凝土荷载的比例,同时还发现搭设高度对模板支架承担混凝土荷载的比例有显著影响,随着搭设高度的增加,模板支架承担荷载的比例将会降低。 展开更多
关键词 模板 模板支架 SRC梁 试验 有限元分析 荷载 研究
在线阅读 下载PDF
新时期40年(1978-2018)梁斌研究回顾 预览
19
作者 赵坤 《河北民族师范学院学报》 2019年第2期28-36,共9页
1978年后关于梁斌的研究经久不衰,八九十年代集中在对《红旗谱》人物形象、语言艺术、民族风格等表层现象的研究。新世纪以后的研究主要集中在小说的比较研究和它的文学史意义的探讨,研究视野更加开阔,研究角度更加多元化。现在有关梁... 1978年后关于梁斌的研究经久不衰,八九十年代集中在对《红旗谱》人物形象、语言艺术、民族风格等表层现象的研究。新世纪以后的研究主要集中在小说的比较研究和它的文学史意义的探讨,研究视野更加开阔,研究角度更加多元化。现在有关梁斌的研究大部分成果集中于他的《红旗谱》三部曲,对他的诗歌、戏剧、杂文的研究较少。本文将整体上回顾上近四十年梁斌研究的概况,从史料性研究、文本解读、比较研究、价值判定四个方面呈现梁斌研究的具体情况。 展开更多
关键词 梁斌 《红旗谱》 研究概况
在线阅读 免费下载
蓄能器对高精密液压系统保压精度影响的研究 预览
20
作者 陆响明 李滨城 《机械制造》 2019年第7期33-36,51共5页
为研究蓄能器对高精密液压系统保压精度的影响,应用功率键合图建立了高精密液压系统的等效数学模型,并在AMESim软件中建立高精密液压系统的仿真模型,以蓄能器的预充氮气压力为变量进行仿真分析。通过仿真分析,得到高精密液压系统输出端... 为研究蓄能器对高精密液压系统保压精度的影响,应用功率键合图建立了高精密液压系统的等效数学模型,并在AMESim软件中建立高精密液压系统的仿真模型,以蓄能器的预充氮气压力为变量进行仿真分析。通过仿真分析,得到高精密液压系统输出端的压力变化,并与实验室试验结果进行对比,验证仿真模型的正确性。通过研究确认,蓄能器的预充氮气压力能显著影响高精密液压系统的保压精度,合理的预充氮气压力能有效吸收外部负载振动,为高精密液压系统的设计与优化提供参考。 展开更多
关键词 蓄能器 液压系统 保压精度 研究
在线阅读 下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部 意见反馈