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N维自治系统的周期解

西北大学学报(自然科学版) 1987年第1期 68-73页

作者：高占海西北大学数学系

在文[1]中,Nemytskii曾给出了系统(1)周期解存在的充分条件。本文是在文[1]基础上的进一步研究,其结果包含了文[1]中的结论。在文中,给出了例子说明本文的结果较文[1]厂泛。

关键词：周期解有限时间经过曲面所有定理轨线自治系统驻定系统

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变电站五防功能不完善分析及整改措施

冶金动力 2020年第8期 17-19页

作者：高占海酒泉钢铁(集团)有限责任公司甘肃嘉峪关735100

电网中五防闭锁系统是保证电网、设备和人身安全的重要措施,也是防止电气误操作的一种技术手段。深入分析了变电站五防功能不完善存在的问题,并针对这些问题提出了一些整改措施。

关键词：变电站防误闭锁微机五防问题措施

教育实践层面上档案学社会教育体系的初步构建

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档案管理 2021年第6期 122-123页

作者：宋琦高占海庞海青梁秀慧德州学院数学科学学院德州学院音乐学院德州学院档案馆德州学院汉语言学院

在教育实践层面上构建档案学社会教育体系,主要有三个方面:档案学社会教育的教育服务机构、教育要求和受教主体,针对档案学社会教育的教育服务机构这个一级指标又从两个二级指标:档案学社会教育的师资队伍和服务团队同时建设,针对教育... 详细信息

在教育实践层面上构建档案学社会教育体系,主要有三个方面:档案学社会教育的教育服务机构、教育要求和受教主体,针对档案学社会教育的教育服务机构这个一级指标又从两个二级指标:档案学社会教育的师资队伍和服务团队同时建设,针对教育要求这个一级指标从四个二级指标:教育目标、教育资料、教育管控治理的过程设计和教育监督机制同时建设。构建该体系的目的是提高公民的档案素养、在学习型社会建设中最大限度地实现档案的教育价值。

关键词：学习型社会档案学社会教育教育体系服务机构教育管控

The Relationship between Human Papillomavirus and Oesophageal Squamous Cell Carcinoma in China—A Review of the Evidence

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Advances in Infectious Diseases 2013年第1期3卷 17-34页

作者： Surabhi S. Liyanage Qian Li Yang Zheng Holly Seale Philip J. Crowe Anthony T. Newall Bayzidur Rahman Eva Segelov Chenxu Qu Fanghui Zhao Junfeng Liu zhanhai gao Weixian Shi Peng Yang Aye Moa Chandini Raina MacIntyre Centre for Disease Control and Prevention Beijing China Department of Cancer Epidemiology Cancer Institute Chinese Academy of Medical Sciences Peking Union Medical College Beijing China Department of Medicine St. Vincent’s Hospital Clinical School The University of New South Wales Sydney Australia Department of Surgery Fourth Hospital Shijiazhuang China Department of Surgery Prince of Wales Hospital Clinical School The University of New South Wales Sydney Australia School of Public Health and Community Medicine The University of New South Wales Medicine The University of New South Wales Sydney Australia

Background: China has one of the highest incidence rates of oesophageal cancer in the world. The role of human papillomavirus (HPV) has been extensively researched in oesophageal squamous cell carcinoma (OSCC) with indeterminate results. The majority of these studies have been conducted in the Chinese population. Evidence for a definitive HPV-OSCC association could potentially support prophylactic vaccination in target populations, highlighting the need for ongoing investigation. The aim of this review is to summarise the findings of HPV DNA in OSCC tissue in Chinese subjects, with a view to informing further research in this area. Methods: A systematic literature search of the Chinese National Knowledge Infrastructure (CNKI) database, Medline, Embase and PubMed was conducted for all studies in English and Chinese language, examining OSCC tissue for HPV DNA in China. Reference lists of retrieved articles were reviewed and hand searches of relevant, key journals were conducted, to source articles which were not electronically indexed. Sixty-four studies met our selection criteria. Data from case-control and cross-sectional studies were analysed separately for any HPV-OSCC association, using the Epi InfoTM 3.5.3 software program. Results: From all studies conducted in the Chinese population, 2166/5953 (36%) of all OSCC tissue and 478/1684 (28%) of healthy control tissue, tested positive for HPV. We found that 11/16 case-control and cross-sectional studies had a statistically significant crude odds ratio, which supported a potential HPV-OSCC association. The largest study, carried out in the high incidence County of Anyang in Henan Province, reported 207/265 (78%) OSCC tissues testing positive for HPV DNA against 203/357 (57%) controls and had an unadjusted odds ratio of 2.71 (p-value Conclusion: A rigorous meta-analysis would improve interpretation of the data and a well-designed large-scale case-control study is warranted. If a link is found between HPV and OSCC, pro

关键词： Human Papillomavirus Oesophageal Carcinoma Squamous Cell Carcinoma HPV Vaccine China

一起10 kV母线失压的原因分析及整改建议

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冶金动力 2021年第5期 8-11页

作者：高占海雷定森吴志威酒泉钢铁(集团)有限责任公司甘肃嘉峪关735100

某开关站一10 kV线路用户因启机时发生相间短路故障保护动作跳闸,短时间故障未切除情况下现场人员再次启机,导致系统连续遭受故障电流、电压冲击,造成事故扩大,10 kV母线失压。通过保护动作信息及故障录波文件分析,找到了10 kV母线失压... 详细信息

某开关站一10 kV线路用户因启机时发生相间短路故障保护动作跳闸,短时间故障未切除情况下现场人员再次启机,导致系统连续遭受故障电流、电压冲击,造成事故扩大,10 kV母线失压。通过保护动作信息及故障录波文件分析,找到了10 kV母线失压事故的具体原因,为避免类似事故的再次发生提出了一些整改建议。

关键词：短路越级跳闸母线失压故障录波

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在低温条件下过滤乳糜血浆的新方法探究

中国输血杂志 2020年第10期33卷 1105-1106页

作者：高占海张福敏黄占华纪晓花廊坊市中心血站河北廊坊065000 廊坊卫生职业学院

目的寻找1种简便、低廉、有效过滤乳糜血浆的新方法。方法2019年1—6月,设定试验环境温度为4℃(低温条件),将30份200 mL重度乳糜血浆标本等分成4份(50 mL/份),连接乳糜血过滤器,采取悬挂法过滤乳糜血浆,记录过滤时间,630 nm波长测定过... 详细信息

目的寻找1种简便、低廉、有效过滤乳糜血浆的新方法。方法2019年1—6月,设定试验环境温度为4℃(低温条件),将30份200 mL重度乳糜血浆标本等分成4份(50 mL/份),连接乳糜血过滤器,采取悬挂法过滤乳糜血浆,记录过滤时间,630 nm波长测定过滤前后的乳糜血浆标本吸光度值。结果经0.22μm孔径聚醚砜材质乳糜血过滤器过滤后,血浆吸光度值均<0.090,x=0.057±0.016,且滤过时间在可接受范围内[(76.333±2.987)s]。结论针对小标本乳糜血浆,该方法具有过滤速度快、滤过效果好、操作简便、影响因素少等优点。后期我们将通过增加过滤面积、优化滤器结构、适当增加过滤压力等方法来不断改进,使其能实际应用于血站成分分离环节。

关键词：乳糜血浆过滤聚醚砜新方法

某钢厂一起10kV配电系统接地故障分析与整改

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冶金动力 2021年第4期 13-14,18页

作者：吴志威李鹏飞王斌先高占海甘肃酒泉钢铁(集团)有限责任公司甘肃嘉峪关735100

某钢厂10kV配电系统采用中性点不接地方式供电。针对该系统内一次单相接地故障引起的两点接地短路,造成系统波动,导致生产工序停电、停产事故,对其原因进行系统分析,明确故障根源,并制定出相关整改措施,避免类似事故再次发生。

关键词：单相接地配电系统消弧消谐过电压

Grain-size distribution patterns of suspended sediment in response to hydrodynamics on the Dafeng intertidal flat, Jiangsu, China

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Acta Oceanologica Sinica 2006年第6期25卷 63-77页

作者： LI zhanhai gao Shu CHEN Shenliang WANG Yaping State Key Laboratory of Estuarine and Coastal Research East China Normal University Shanghai 200062 China Key Laboratory of Coast and Island Development of Ministry of Education Nanjing University Nanjing 210093 China

Patterns of grain-size distributions of suspended sediment in relation to resuspension, settling, and tidal processes are investigated, based on in situ measurements over the Dafeng intertidal flat, on the Jiangsu coast, in the summer of 2002 and 2003. The suspended sediment here is dominated by fine and very fine silt, with a mean grain-size of 7 - 13 μm. The patterns of the grainsize distributions of suspended sediment during a tidal cycle are characterized by two types： one stable type representing insignificant spatial and temperal variations; and the other bimedal type with significant variations. The main factors influencing the grainsize distributions include resnspension, settling, suspended sediment imported into intertidal flats during the flood phase, and the grain-size distribution of seabed sediment. Resuspension increases the coarse particle content, enhances the mean grain-size of suspended sediment, and results in grain-size distributions for the suspended sediment similar to those of seabed sediment; the settling process has opposite effects on the suspended sediment. When resuspension occurs, the gain-size distributions of suspended sediment in the lower part of water column respond significantly to the current velocity. Where the influence of resuspension and settling processes is weak, the grain-size distributions of suspended sediment appear to be stable and almost identical for the various parts of intertidal flats during different measurement periods. Such distributions are referred to the background grain-size distribution, for which the mean grain-size over the Dafeng intertidal flat is around 7 μm.

关键词： grain-size distributions suspended sediment resuspension settling Jiangsu coast

Longitudinal residual circulation in the South Passage of Yangtze Estuary:Combined influences from runoff,tide and bathymetry

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Science China Earth Sciences 2021年第12期64卷 2129-2143页

作者： Lifen ZHANG Zuosheng YANG Fan ZHANG zhanhai LI Yaping WANG Shu gao State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai200062China College of Marine Geosciences Ocean University of ChinaQingdao266100China School of Geographic and Oceanographic Sciences Nanjing UniversityNanjing210023China

Classical estuary circulation theory states that in the longitudinal direction of an estuary there exists a single circulation with landward,near-bottom,and seaward,near-surface flows;however,the situation becomes complicated with the presence of a river mouth *** we conducted tidal-cycle observations in the South Passage of the Yangtze Estuary during both the wet and dry seasons of 2018(July and December,respectively).The simultaneous current velocity,temperature,and salinity profile data were obtained from anchored boats and base tripods at three stations along the channel in the mouth bar *** results reveal two distinct longitudinal residual circulation patterns:a classic circulation which is formed on the seaward slope of the mouth bar during the wet season,and a double circulation system which is composed of two circulation cells over the landward and seaward slopes of the mouth bar during the dry *** Simpson number(Si),mixing parameter(M),and salinity data were used to quantify the mixing intensity,which shows that horizontal baroclinic pressure gradient is the dominant factor in the formation of the longitudinal residual ***,the double circulation pattern during the dry season is related to the mouth bar bathymetry,which affects saltwater *** double circulations can significantly influence the spatial and temporal evolution of the stagnation point in the estuarine channel,which in turn modifies the distribution patterns of suspended sediment concentration in the maximum turbidity ***,the changes in the mouth bar sandbar bathymetry in response to human activities and river basin hydrographic conditions indirectly affect the occurrence and scale of the double circulations.

关键词： Longitudinal residual circulation Tidal straining River mouth bar Double circulations Estuary turbidity maximum Yangtze River