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100 MW汽轮机突发振动故障分析与处理

石油化工技术与经济 2024年第2期40卷 37-40页

作者：范文军中国石化上海石油化工股份有限公司上海200540

针对某自备热电厂一起汽轮机突发振动故障,通过故障现象、振动趋势和振动频谱分析,确认突发故障是由叶片断裂引起,并进一步分析了叶片断裂的原因。根据汽轮机需要尽快恢复生产的现状,通过方案对比,选定叶片对称割短的处理方案,方案实施... 详细信息

针对某自备热电厂一起汽轮机突发振动故障,通过故障现象、振动趋势和振动频谱分析,确认突发故障是由叶片断裂引起,并进一步分析了叶片断裂的原因。根据汽轮机需要尽快恢复生产的现状,通过方案对比,选定叶片对称割短的处理方案,方案实施后取得了良好的效果。

关键词：汽轮机突发振动轴振故障

One dimensional nickel phosphide polymorphic heterostructure as carbon-free functional support loading single-atom iridium for promoted electrocatalytic water oxidation

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Journal of Energy Chemistry 2023年第4期79卷 410-417页

作者： Rashid Mehmood Guifa Long wenjun fan Mingrun Li Lifang Liu Fuxiang Zhang StateKey Laboratory of Catalysis iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian National Laboratory for Clean EnergyDalian 116023LiaoningChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China GuangxiKey Laboratory of Chemistry and Engineering of Forest Products School of Chemistry and Chemical EngineeringGuangxi Minzu UniversityNanning 530008GuangxiChina

Although conducting materials such as carbon nanotube and carbon fiber paper(CFP)have been extensively employed as support of electrocatalytic active sites,most of them are of poor catalytic functionality by themselves and undesirable stability during strong acid/alkaline environments or oxidation *** we report a novel one-dimensional(1D)nickel phosphide polymorphic heterostructure(denoted as NPPH)to work as one effective carbon-free functional support for loading of single-atom Ir water oxidation ***,the NPPH composed of both Ni12P5and Ni2P phases is not only active for robust alkaline water oxidation but also is of good stability and hydrophilicity for favorable loading of single-atom dispersed *** NPPH supported single-atom Ir electrocatalyst(Ir/NPPH)is found to exhibit remarkably superior water oxidation activity with respect to the NPPH itself or CFP supported single-atom Ir catalyst(Ir/CFP),demonstrating the synergetic promotion effect between NPPH and single-atom Ir ***,the NPPH supported single-atom Ir catalyst can bear alkaline water oxidation for over 120 h at current density of 50 mA cm^(-2).The NPPH developed here is expected as functional support to composite with other water oxidation catalysts,as may be an alternative strategy of developing highly efficient carbon-free electrocatalysts.

关键词： Oxygen evolution reaction Single atom catalyst Nickel phosphide Heterostructure One-dimensional

生物陶瓷iRoot BP Plus治疗年轻恒牙再生性牙髓的效果及对牙本质桥形成率、钙化物生成体积的影响

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中国美容医学 2024年第6期33卷 149-152页

作者：沈希明胡小伟闫昱辛樊文君殷晓霞杨娟张家口市口腔医院牙体牙髓科河北张家口075001 张家口市口腔医院儿童口腔科河北张家口075001 张家口市口腔医院牙周科河北张家口075001

目的:探究生物陶瓷iRoot BP Plus治疗年轻恒牙再生性牙髓的效果及对牙本质桥形成率、钙化物生成体积的影响。方法:回顾性分析2019年1月-2021年12月张家口市口腔医院收治的60例(共64颗患牙)年轻恒牙慢性根尖周炎患儿的临床资料,根据治疗... 详细信息

目的:探究生物陶瓷iRoot BP Plus治疗年轻恒牙再生性牙髓的效果及对牙本质桥形成率、钙化物生成体积的影响。方法:回顾性分析2019年1月-2021年12月张家口市口腔医院收治的60例(共64颗患牙)年轻恒牙慢性根尖周炎患儿的临床资料,根据治疗方式不同进行分组,其中将接受常规三氧化矿物凝聚体(Mineral trioxide aggregate,MTA)支架再生牙髓手术者纳入MTA组(n=29,共31颗患牙),接受生物陶瓷iRoot BP Plus支架再生牙髓手术者纳入iRoot BP Plus组(n=31,共33颗患牙)。比较两组临床疗效、牙本质桥形成率、钙化物生成体积及根管改善情况,并随访术后1年患牙的恢复情况。结果:iRoot BP Plus组临床总有效率为93.94%,高于MTA组的74.19%(P<0.05)。术后1个月及术后3个月,iRoot BP Plus组牙本质桥形成率与钙化物生成体积均高于MTA组(P<0.05)。术后3个月,两组患牙根管长度及根管壁厚度均较术前增加,且iRoot BP Plus组高于MTA组(P<0.05)。术后1年,iRoot BP Plus组根尖孔封闭、萌出高度增加及牙色泽正常比例均高于MTA组(P<0.05)。结论:生物陶瓷iRoot BP Plus治疗年轻恒牙再生性牙髓的疗效确切,能有效促进牙本质桥与钙化物的形成,且有助于根管改善与患牙恢复,值得临床推广应用。

关键词： iRoot BP Plus 年轻恒牙再生性牙髓牙本质桥钙化物牙髓手术

Blooming Kelsang Flowers China Celebrates 70th Anniversary of Tibet's Peaceful Liberation

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Women of China 2021年第5期 22-33页

作者： fan wenjun 不详

The date was May 23,*** event was the peaceful liberation of *** happened when the Agreement of the Central People's Government and the Local Government of Tibet on Measures for the Peaceful Liberation of Tibet was signed in *** event was a turning point in the history of Tibet(in Southwest China),as it furthered both Chinese people's liberation and the country's *** year marks the 70th anniversary of Tibet's peaceful *** the past seven decades,under CPC(Communist Party of China)'s leadership,the Tibetan people have made continuous efforts to promote Tibet's political,social,economic and cultural *** a result,dramatic social and economic changes have taken place in the *** have been lifted out of absolute poverty,and Tibet Autonomous Region has become more modern,open and tolerant.

关键词：西藏和平解放西藏地方政府绝对贫困格桑花解放事业西藏妇女光辉历程实现跨越

Celebrating 30 th Anniversary of Spring Bud Project

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Women of China 2019年第8期 20-29页

作者： fan wenjun China Children and Teenagers' Fund

Children are the future - and hope - of the Chinese nation. This year marks the 30th anniversary of the implementation of the Spring Bud Project, which was initiated by the China Children and Teenagers1 Fund (CCTF). During the past three decades, a great number of poverty-stricken girls have grown up and made noticeable progress, thanks in large part to the project.

关键词：纪念儿童少年公益项目贫困女童人生梦想基金会社会

Lotus Flower in Full Bloom Celebrating 20th Anniversary of Macao's Return to China

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Women of China 2019年第12期 20-31页

作者： fan wenjun 不详

On December 20,1999,with China's national flag flying in the night sky,Macao officially returned to *** the past two decades,Macao has experienced rapid economic development,continuous improvement of peopled livelihoods and social harmony and *** demonstrates the successful implementation of the "one country,two systems" principle in the Macao Special Administrative Region(SAR).During that time,exchanges between Macao and the Chinese mainland have been increasingly *** and more women in Macao have integrated their personal growth into the overall development of the ***,women from all segments of society in Macao are making concerted efforts to build a beautiful ***,like a lotus flower,will shine more brightly in the future.

关键词：澳门回归一国两制持续改善历史进程特别报道美好家园社会和谐稳定成功实践

Heartwarming,Loving Gestures Volunteers Help,Care for Disadvantaged Children

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Women of China 2020年第2期 33-35页

作者： fan wenjun 不详

In response to the call of the All-China Women’s Federation(ACWF),women’s federations,at all levels across the country,during the past two months have organized volunteers to conduct activities,to help and care for disadvantaged children(including orphaned and/or disabled children,minors from povertystricken families and left-behind children,whose parents have left home to work elsewhere),especially those in rural areas,in various regions of China,so the children can enjoy a wonderful winter vacation.

关键词：全国妇联困境儿童留守儿童联合开展

A Woman＇s FamilyGrandmother, Offspring Promote Ethnic Mosuo＇s Virtues, Culture

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Women of China 2017年第8期 42-45页

作者： fan wenjun

The village of Luoshui is located near Lugu Lake, in Ninglang County, in Southwest China＇s Yunnan Province. There are 72 households, inhabited by ethnic Mosuo people, in the village. In recent years, the rapidly developing tourist business has transformed the village into a tourists＇ Mecca, as the village has welcomed visitors from both home and abroad. Ci＇ercili, the grandmother in a 23-member Mosuo family, is 84. The elderly woman, who has clear vision and good hearing, lives peacefully with her offspring. She continues to teach her children, grandchildren and great- grandchildren to show filial piety to the elder members of the family. She also teaches them to work hard, be glad and willing to help others and to protect the environment, especially within the village.

关键词：女人美德后代文化中国西南部少数民族继续教育家庭成员

Let Children Shine Principal Advocates Education for All-round Development

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Women of China 2017年第6期 15-17页

作者： fan wenjun

蘑庆市谢家湾小学校长刘希娅是十二届全国人大代表。2004年以来，她提出了“六年影响一生”的办学理念，并组织实施厂“红梅花儿开，朵朵放光彩”主题型校园文化建设。在她的带领下，学校通过课程整合，建构并实施了“小梅花”课程，探... 详细信息

蘑庆市谢家湾小学校长刘希娅是十二届全国人大代表。2004年以来，她提出了“六年影响一生”的办学理念，并组织实施厂“红梅花儿开，朵朵放光彩”主题型校园文化建设。在她的带领下，学校通过课程整合，建构并实施了“小梅花”课程，探索出小学素质教育的新经验。刘希娅坚持把孩了的立场作为办学的出发点和落脚点，让每一个孩子按照自己的优势去发展。

关键词：教育校长儿童