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OTN技术在电力系统通信中的应用研究

通信电源技术 2024年第17期41卷 80-82页

作者：吴晓飞骆小明国网浙江省电力有限公司义乌市供电公司浙江义乌322000

随着电力系统对通信技术依赖性增强,传统通信框架已无法满足其高效率和高安全性需求。光传送网(Optical Transport Network,OTN)技术凭借其高带宽、高可靠性以及优异的网络管理能力,成为现代电力系统通信的理想选择。文章深入探讨OTN技... 详细信息

随着电力系统对通信技术依赖性增强,传统通信框架已无法满足其高效率和高安全性需求。光传送网(Optical Transport Network,OTN)技术凭借其高带宽、高可靠性以及优异的网络管理能力,成为现代电力系统通信的理想选择。文章深入探讨OTN技术在电力系统通信中的应用,包括提高数据传输速率、增强网络可靠性与故障恢复能力、优化网络资源分配,并通过冗余设计和灾难恢复策略增强系统的整体稳定性。最后,进行技术应用测试,验证OTN技术在实际电力系统中的应用效果和潜在价值。

关键词：光传送网(OTN)技术电力系统网络资源分配

The Divided City:Imagining the"Urban"in Contemporary Cninese Science Fiction

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Frontiers of Literary Studies in China-Selected Publications from Chinese Universities 2018年第4期12卷 583-609页

作者： luo xiaoming Program in Cultural Studies Shanghai UniversityShanghai 200444China

Following China’s large-scale process of urbanization, the distinctive characteristics of China’s “city(s)” has also begun taking shape. Descriptions and imaginative writings about the city found in contemporary Chinese science fiction have demonstrated unique and yet very specific ways of understanding the city. They have displayed discontentment with the high-level fragmentation of urban space as well as its implicit social inequality, yet also have reflected upon the urban individual’s resort to acquiescence and self-justification as a result of their inability to effectively dismantle such predicaments. In these kinds of imaginary relations, the city becomes an object which is difficult to fathom yet unable to be resisted. Though science fiction novels are able to reconceptualize the city through the reconstruction of space and time, thus bringing about seemingly new visions of the city, yet when these narratives begin to deviate from topics such as the “social property of time,” or that of “social labor,” they themselves then become problematic.

关键词： city urban space contemporary Chinese science fiction space-time exchange social labor

The Hopeless Bullet： On Let the Bullets Fly

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Frontiers of Literary Studies in China-Selected Publications from Chinese Universities 2013年第3期7卷 512-517页

作者： xiaoming luo Shanghai University

In December 2010, Jiang Wen released his first New Year＇s celebration film： Let the Bullets Fly. The film is an adaptation of Dao Guan Ji, a chapter from MaShitu＇s novel Ye Tan Shiji. The story takes place in the Northern Warlord era, where a con man called Lao Tang has purchased a governorship. On his way to take up his new post, he happens to encounter Zhang Mazi （Jiang Wen）, the ringleader of a Robin Hood-style robbery.

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Application of a microseismic monitoring system in deep mining

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Journal of University of Science and Technology Beijing 2007年第1期14卷 6-8页

作者： Chengxiang Yang Zhouquan luo Guobin Hu xiaoming Liu School of Resources and Safety Engineering Central South University Changsha 410083 China

A microseismic monitoring system was used in the Donggua Shan underground copper mine, and its application was introduced. The spacial distribution of the seismic event was monitored effectively during mining with this system. The distribution of the seismic intensity in different time periods and in the different mining districts was obtained via the clustering analysis of the monitored results, and the different intensity concentration districts of seismicity were compartmentalized. The various characteristics and waveforms of different vibrations in the underground mine were revealed with the help of the micro-seismic monitoring system. It was proved that the construction and application of the micro-seismic monitoring system in the mine not only realized the continuous monitoring of seismicity in the deep mine, but also settled an this system.

关键词： microseismicity monitoring event deep mining important foundation for further studies on hazard prediction, based on

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对分课堂与在线表格在机械设计中的创新应用

科教导刊 2024年第9期 122-125页

作者：丁文捷雒宵罗小明杨成宁夏大学机械工程学院宁夏银川750021

针对机械设计课程设计实践教学环节融入课程思政、提升教学效率、提高学习成效等问题,综合运用对分课堂和在线表格设计等交互工具,以工程伦理的安全可靠性问题为切入点导入教学,引导学生围绕强度和耐久性校核设计进行检索式学习和设计训... 详细信息

针对机械设计课程设计实践教学环节融入课程思政、提升教学效率、提高学习成效等问题,综合运用对分课堂和在线表格设计等交互工具,以工程伦理的安全可靠性问题为切入点导入教学,引导学生围绕强度和耐久性校核设计进行检索式学习和设计训练,培养学生的工程伦理意识和解决实际问题的能力。教师引导、学生训练一体化,技能培养、意识塑造一体化,通过对设计过程进行总结和反思,从而获取课堂教学的反馈,为学生未来的学习和教师的教学改进提供指导。

关键词：机械设计课程探索检索式学习问题导入式教学

Influence of separator control on the characteristics of severe slugging flow

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Petroleum Science 2014年第2期11卷 300-307页

作者： luo xiaoming He Limin Liu Xinye Lü Yuling College of Pipeline and Civil Engineering China University of Petroleum

Due to the special structure of offshore multiphase pipes, it is easy for severe slugging to occur in the riser at low gas-liquid velocity. Violent pressure fluctuations and dramatic changes of flow rate are the main characteristics of severe slugging, leading to the risk of serious damage. In this paper, the separator control is adopted to accurately control the separator liquid level and pressure under severe slugging flow conditions. This indicates that the separator liquid level control alone does not have a significant impact on the upstream flow, but it is beneficial for normal operation and pressure control of the separator. As the separator pressure increases, the peak pressure in the riser apparently diminishes, and the amplitude of pressure fluctuation gradually decreases, which means that severe slugging is inhibited. During the slug blowing out, the gas/liquid slipping in the riser intensifies. The long gas plug quickly flows through the riser, and then tends to morph into short and slowly flowing gas bubbles. The elimination effect of the pressure control strategy on severe slugging is related to the relative rate of the superficial gas/liquid flow.

关键词： Multiphase flow severe slugging separator control riser

昆山市农村人群幽门螺杆菌感染情况调查及其影响因素

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上海医学 2024年第5期47卷 289-296页

作者：王秀霞张婷秦威罗宏罗晓明苏州市广济医院护理部江苏苏州215000 昆山市疾病预防控制中心慢病科昆山市锦溪镇社区卫生服务中心疾病控制科

目的了解昆山市农村户籍人口中幽门螺杆菌(Helicobacter pylori,***)感染情况及其影响因素,为开展***防治提供依据。方法采用横断面调查研究,随机整群抽取锦溪镇8个村(社区)30~70岁户籍人口中符合纳排标准的人群,采用14C尿素呼气试验... 详细信息

目的了解昆山市农村户籍人口中幽门螺杆菌(Helicobacter pylori,***)感染情况及其影响因素,为开展***防治提供依据。方法采用横断面调查研究,随机整群抽取锦溪镇8个村(社区)30~70岁户籍人口中符合纳排标准的人群,采用14C尿素呼气试验检测其***感染情况。采用结构性问卷面对面调查研究对象的人口学特征和生活方式等因素;通过单因素和多元logistic回归分析人口学特征和生活方式等因素与***感染的关联性。结果共纳入调查对象8 722名,***的总感染率为44.58%,男性感染率为42.50%(1 657/3 898),女性感染率为46.27%(2 232/4 824)。单因素分析结果显示,不同年龄段、性别、婚姻状况、BMI情况、饭前洗手和吸烟情况人群***感染率的差异均有统计学意义(P值均<0.05)。logistic回归分析显示,与<40岁年龄组相比,40~49岁、50~59岁和≥60岁人群感染***的风险分别是<40岁年龄组感染***的1.613倍(95%CI为1.281~2.031,P<0.001)、1.575倍(95%CI为1.263~1.965,P<0.001)和1.307倍(95%CI为1.047~1.630,P=0.018)。女性感染***的风险是男性感染***的1.132倍(95%CI为1.003~1.277,P=0.045)。超重和肥胖人群感染***的风险是偏瘦人群的1.291 5倍(95%CI为1.026~1.62,P=0.030)。结论昆山地区农村户籍人口***感染率居于全国平均水平,***感染与年龄、性别和BMI有关。

关键词：幽门螺杆菌流行病学调查影响因素

Influence of slug flow on flow fields in a gas–liquid cylindrical cyclone separator:A simulation study

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Chinese Journal of Chemical Engineering 2020年第8期28卷 2075-2083页

作者： xiaoming luo Jing Ren Tong Chen YibinWang Yuling Lü Limin He Shandong Key Laboratory of Oil&Gas Storage and Transportation Safety China University of Petroleum(East China)Qingdao 266580China Sinopec luoyang Engineering Co. Ltd.Luoyang 471003China

A simulation method for slug flow based on the VOF multiphase flow model was implemented in ANSYS?Fluent via a user-defined function(UDF)and applied to the dissipation of liquid slugs in the inlet pipe of a gas–liquid cylindrical cyclone(GLCC)separator while varying the expanding diameter ratio and angle of *** dissipation of liquid slug in inlet pipe is analyzed under different expanding diameter ratios and inclination *** the inlet pipe,it is found that increasing expanding diameter ratio and inclination angle can reduce the liquid slug stability and enhancing the effect of gravity,which is beneficial to slug flow *** the cylinder,increasing the expanding diameter ratio can significantly reduce the liquid carrying depth of the gas phase but result in a slightly increase of the gas content in the liquid phase ***,increasing the inclination angle results in a decrease in the carrying depth of liquid in the vapor phase,but enhances gas–liquid mixing and increases the gas-carrying depth in the liquid *** into consideration the dual effects of slug dissipation in the inlet pipe and carrying capacity of gas/liquid spaces in the cylinder,the optimal expanding diameter ratio and inclination angle values can be determined.

关键词： GLCC Slug simulation Flow pattern Liquid slug dissipation Cyclonic flow field analysis

Experimental study on sand particles accumulation,migration and separation efficiency in slug catcher

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Chinese Journal of Chemical Engineering 2021年第4期34卷 134-143页

作者： Xianchao Liang Limin He xiaoming luo Qingping Li Yuanpeng You Yiqiu Xu College of Pipeline and Civil Engineering China University of Petroleum(East China)Qingdao 266580China Offshore Oil Engineering Co.Ltd Tianjin 300461China

Sand production often leads to the failure of production equipment on offshore ***,a new idea has been put forward,which is installing cyclone or baffle in the internal of the slug catcher for better sand *** this paper,an experimental study is presented,which mainly includes sand particles accumulation shape,migration law and separation *** results suggest that the accumulation area is mainly divided into two zones:the crowded settlement zone and the free settlement *** crowded settlement zone has a special shape,which can be characterized by two parameters:accumulation length and accumulation *** sampling analysis shows obvious particle *** particle size decreases with the increase of the axial distance,and the range of particle size distribution narrows *** separation experiment shows that the gas velocity has the greatest influence on the separation *** the gas velocity is 14 m·s^ 1,the separation efficiency drops sharply,which can be abated by installing cyclone *** addition,the separation efficiency tends to be a constant under different gas velocities by installing baffle with appropriate *** the effectiveness and rationality of installing internal components can be strongly *** these provide important guidance for maximizing the sand control function of the slug catcher.

关键词： Slug catcher Particle size distribution Separation efficiency Sedimentation Cyclone separator Baffle