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一起500 kV主变跳闸故障及运维技术分析

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电力与能源 2024年第3期45卷 381-384页

作者：梁颖秦佳鸣陈豪国网上海市电力公司超高压分公司上海200063

随着社会经济的快速发展,对电能的需求量日益增加,进而推动着我国电力工业的发展。确保持续、稳定的电力供应,对社会发展和提高城市居民生活质量都至关重要。城市供电系统的稳定是促进城市整体发展的根本,变电设备的顺利运行是实现这一... 详细信息

随着社会经济的快速发展,对电能的需求量日益增加,进而推动着我国电力工业的发展。确保持续、稳定的电力供应,对社会发展和提高城市居民生活质量都至关重要。城市供电系统的稳定是促进城市整体发展的根本,变电设备的顺利运行是实现这一目标的基础。因此,以某变电站运行中的跳闸事故为例,分析了跳闸故障的原因,并借助自动化设备快速排查和处理故障,以保证电力系统的安全稳定运行。

关键词：变电运行跳闸故障运维技术

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变电站智能巡检系统实用化应用分析

电力与能源 2024年第3期45卷 389-391页

作者：秦佳鸣梁颖金继开国网上海市电力公司超高压分公司上海200063

为更好地落实国网“两个替代”要求,采用智能巡检系统进行变电站巡检,介绍了某500 kV全地下变电站试运行的一套智能巡检系统,该系统可配合运维人员完成变电站的日常巡视。对该智能巡检系统的试运行结果进行了分析,并提出后期改进建议,... 详细信息

为更好地落实国网“两个替代”要求,采用智能巡检系统进行变电站巡检,介绍了某500 kV全地下变电站试运行的一套智能巡检系统,该系统可配合运维人员完成变电站的日常巡视。对该智能巡检系统的试运行结果进行了分析,并提出后期改进建议,以期推进智能巡检系统的实用化进程。

关键词：配电网地下变电站智能巡检系统

Characterization of a Chiral Low Molecular Weight Gelator in Gel State Using Various Circular Dichroism Methods

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Chemical Research in Chinese Universities 2017年第1期33卷 119-121页

作者： SUN Huayan qin jiaming LI Yi LI Baozong YANG Yonggang Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application Department of Polymer Science and Engineering State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 P. R. China

Circular dichroism（CD） is usually used to study supramolecular chirality. With the development of CD methods, diffuse transmission CD（DTCD） and diffuse reflectance CD（DRCD） have been developed. However, the relationship among CD, DTCD and DRCD has not been well-studied. A chiral low molecular weight gelator was synthesized, which can result in a transparent physical gel in deionized water. The field-emission electron microscopy images show that the gel is able to self-assemble into left-handed helical fibers. The CD and DTCD spectra are al- most identical, but they partially differ from the DRCD spectrum. Based on the TD-DFT calculated CD spectrum, the DRCD spectrum is shown to be more accurate.

关键词： Optical activity Circular dichroism Self-assembly

The record of paleoclimatic change from stalagmites and the determination of termination Ⅱ in the south of Guizhou Province, China

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Science China Earth Sciences 2004年第1期47卷 1-12页

作者： ZHANG Meiliang YUAN Daoxian LIN Yushi CHENG Hai qin jiaming ZHANG Huiling Karst Dynamics Laboratory Institute of Karst GeologyChinese Academy of Geological SciencesGuilin 541004China Geography Department Minnesota UniversityMN 55455USA

A high-resolution climate record from 163.00 kaBP to 113.80 kaBP has been obtained through TIMS-U series dating and carbon and oxygen isotope analysis of the three large stalagmites from two caves in the south of Guizhou Province, China. The record of the oxygen isotopes from the stalagmites reveals that the undulation characteristics between the cooling event of the glacial period and the warming event of the interglacial period in the research area can compare well to those of ice cores, lake sediments, loess and deep sea sediments on the scale of ten-thousand years or millennium time scale. The climate undulation provided by the record of the stalagmites has a coherence with the global changes and a tele-connection to the paleoclimate changes in the north polar region. Our results suggest that the direct dynamics of paleo-monsoon circulation changes reflected in the record of the stalagmites might be caused by changes of the global ice volume, and in turn related to various factors, including the solar radiation strength at the mid-latitudes in the Northern Hemisphere, the southern extension of the ice-rafted event in the North Atlantic, and changes of the equatorial Pacific sea surface temperature at the low-latitudes. Using °18O values, we have calculated the temperatures and the results show that the temperature difference between the penultimate glacial period (with an average temperature of 8.1°C, and a minimum temperature range from 0.65°C to-1.43°C at stage 6) and the last interglacial period (with an average temperature of 18.24°C at sub-stage 5e) was about 10°C. This temperature difference from the record of the stalagmites corresponds in general to the record temperature variation (about 10°C) of measured ice cores. The climate records from the three stalagmites in the two caves have shown that the circulation strength of the Asian summer monsoon and the winter monsoon in the penultimate glacial period and the last inter-glacial period had a clear chang

关键词： stalagmite, paleoclimatic change, termination II, south of Guizhou.

Resilient Development of Urban Waterfront in Fast-Changing Cities--A Case Study of Wuhan, China

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Journal of Civil Engineering and Architecture 2014年第8期8卷 1073-1083页

作者： Yang Shu jiaming qin School of Urban Design Wuhan University Wuhan 430072 China Wuhan Land Resources and Planning Bureau Wuhan 430014 China

Urban waterfronts, where the land of city meets a body of water, are unique and finite resources representing the best opportunities for community enhancement and enrichment. On the other hand, waterfronts are also high-risk areas, where the water-related disasters could seriously affect the long-term sustainability of urban environment. This paper focuses on the relationship of the cities with their waterfronts. It presents a case study of Wuhan--a Chinese metropolis, where waterfronts play an important role in its urban planning policy. It attempts to investigate the mechanism of waterfront transformation, and to find out which strategies to adapt and what resilience means in terms of urban waterfronts in a rapidly transforming city. This article examines some representative urban projects on the waterfront and summarizes spatial models applied on the waterfront with distinct policies. Finally, it demonstrates that an urban waterfront is an ＂osmotic interface＂ which should be more correctly envisaged as a network of places, functions, additions and hinges between the city and its water environment. It clarifies that waterfront areas represent a multidisciplinary and multitasking issue in perspective of urban resilient development.

关键词： Waterfront resilient development urban renewal adaptive strategies

Southwest Boundary of Yangtze and Cathaysia Blocks: Constraints from the Luojiashan Gabbro in Yingyangguan Region, Northeastern Guangxi

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Journal of Earth Science 2024年第5期35卷 1447-1463页

作者： Ya qin Zuohai Feng jiaming Zhu Yonggao Huang Jie Wu Yun Zhou Yunfeng Xue Chunzeng Wang Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources by the Province and Ministry Guilin University of Technology Jiangsu Tuojia Engineering Design and Research Co. Ltd. China Chemical Geology and Mine Bureau Henan Branch University of Maine at Presque Isle

The Luojiashan gabbro is a newly discovered mafic pluton emplaced in the Neoproterozoic Yingyangguan Formation in Yingyangguan region of northeastern Guangxi, South China. Comprehensive whole-rock geochemical and zircon geochronological and Hf isotopic analyses are performed on the gabbro and comparisons are made with the coeval mafic-ultramafic sills and dikes located in Longsheng region of northern Guangxi in order to understand the magmatic origin, evolution, and tectonic setting of the Luojiashan gabbro and to address the location of the suture zone of the Southwestern Jiangnan Orogen(SJO). LA-ICP-MS zircon U-Pb ages obtained from the Luojiashan gabbro show that it was emplaced at ～770 Ma. The gabbro contains abundant inherited zircons aged at 0.9–1.3 Ga, consistent with age spectrum of the Cathaysia Block. Chondrite-normalized REE pattern, primitive mantle-normalized trace element spider diagram, incompatible element ratios of Nb/Ta, Zr/Hf, La/Nb, Ba/Th, Th/La, and Ba/La, and Th/Yb-Ta/Yb discrimination diagram of the gabbro are indicative of OIB-like geochemical characteristics and of derivation from partially melted garnet peridotite of the asthenospheric mantle. Tectonic discrimination based on the trace and rare earth elements also indicate that the Luojiashan gabbro was emplaced in a within-plate extensional rift setting, probably as a result of Rodinia supercontinent dismantling, lithospheric thinning, and underplating and upwelling of the asthenospheric mantle. Based on zircon age, Hf isotopic data and comparison between northern and northeastern Guangxi, it is suggested that the Yingyangguan region was tectonically situated in a different tectonic locale from the Longsheng region of northern Guangxi at about 770 Ma during the post-orogenic mafic-ultramafic magmatic event, with the former within the Cathaysia Block and the latter along the southeast margin of Yangtze Block. The suture between the Yangtze and Cathaysia blocks must be located between Yingya

关键词： geochronology inherited zircon Luojiashan gabbro suture Yingyangguan tectonic

Genomic selection of eight fruit traits in pear

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Horticultural Plant Journal 2024年第2期10卷 318-326页

作者： Manyi Sun Mingyue Zhang Satish Kumar Mengfan qin Yueyuan Liu Runze Wang Kaijie Qi Shaoling Zhang Wenjing Chang jiaming Li Jun Wu College of Horticulture State Key Laboratory of Crop Genetics&Germplasm Enhancement and UtilizationNanjing Agricultural UniversityNanjingJiangsu 210095China State Key Laboratory of Crop Biology College of Horticulture Science and EngineeringShandong Agricultural UniversityTai'anShandong 271018China The New Zealand Institute for Plant and Food Research Limited Private Bag 1401Havelock North 4157New Zealand Zhongshan Biological Breeding Laboratory NanjingJiangsu 210014China

Genomic selection (GS) has the potential to improve selection efficiency and shorten the breeding cycle in fruit tree breeding. In this study,we evaluated the effect of prediction methods, marker density and the training population (TP) size on pear GS for improving its performance and reducing cost. We evaluated GS under two scenarios:(1) five-fold cross-validation in an interspecific pear family;(2) independent validation. Based on the cross-validation scheme, the prediction accuracy (PA) of eight fruit traits varied between 0.33 (fruit core vertical diameter)and 0.65 (stone cell content). Except for single fruit weight, a slightly better prediction accuracy (PA) was observed for the five parametrical methods compared with the two non-parametrical methods. In our TP of 310 individuals, 2 000 single nucleotide polymorphism (SNP) markers were sufficient to make reasonably accurate predictions. PAs for different traits increased by 18.21%-46.98%when the TP size increased from 50to 100, but the increment was smaller (-4.13%-33.91%) when the TP size increased from 200 to 250. For independent validation, the PAs ranged from 0.11 to 0.45 using rrBLUP method. In summary, our results showed that the TP size and SNP numbers had a greater impact on the PA than prediction methods. Furthermore, relatedness among the training and validation sets, and the complexity of traits should be considered when designing a TP to predict the test panel.

关键词： Pear Pyrus Prediction method TP size SNP marker number

优质糯玉米新品种桂糯541的选育过程及其特征特性

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现代农业科技 2024年第3期 31-34页

作者：何静丹王兵伟郑加兴覃嘉明韦绍丽周步进黄安霞黄艳芬宋明贵时成俏广西壮族自治区农业科学院玉米研究所广西南宁530227

桂糯541是广西壮族自治区农业科学院玉米研究所以NBW4112为母本、以YL611为父本组配而成的纯糯玉米单交种。该品种的选育以“甜味糯”型糯玉米为目标,采用了软质胚乳型糯玉米×硬质胚乳型糯玉米的杂交模式,融合了北方糯玉米和广西糯玉... 详细信息

桂糯541是广西壮族自治区农业科学院玉米研究所以NBW4112为母本、以YL611为父本组配而成的纯糯玉米单交种。该品种的选育以“甜味糯”型糯玉米为目标,采用了软质胚乳型糯玉米×硬质胚乳型糯玉米的杂交模式,融合了北方糯玉米和广西糯玉米的优良特性,在品质上具有皮薄、柔嫩性好、甜度较高、风味佳、果穗外观好、籽粒饱满平整等优点,同时在产量和抗性上表现优秀,是鲜食和加工两用的新品种,于2022年参加广西鲜食糯玉米区试,并通过了2023年广西壮族自治区农作物品种审定委员会初审。本文阐述了桂糯541的选育过程及其特征特性,并简要总结了其栽培技术,以期为今后利用软质胚乳型糯玉米×硬质胚乳型糯玉米的杂交模式选育“甜味糯”玉米新品种提供例证和技术指导。

关键词：桂糯541 新品种选育过程特征特性

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SiRNA-mediated ankyrin-G silence modulates the expression of voltage-gated Na channels in murine hippocampal HT22 cells

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Acta Epileptologica 2019年第1期1卷 23-30页

作者： Guanzhong Ni Xiaoting Hao Xiaodong Cai jiaming qin Liemin Zhou Patrick Kwan Ziyi Chen Department of Neurology National Key Clinical Department and Key Discipline of Neurologythe First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina. Department of Neurology West China HospitalSichuan UniversityChengduChina. Department of Neurology the Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhouChina. Department of Neurology the Seventh Affiliated HospitalSun Yat-sen UniversityGuangzhouChina. Department of Neurology Royal Melbourne HospitalUniversity of MelbourneMelbourneAustralia.

Background:Voltage-gated sodium channels are the targets of many commonly used antiepileptic ***1.6,encoded by Scn8a,increased in chronic mesial temporal epilepsy animal models and co-localized with Ankyrin-G,encoded by *** hypothesized that inhibition of Ank3 transcription by siRNA decrease the expression of ***:We characterized expression of the target genes in hippocampal neuron HT22 cells by Real *** melt peak in the resolution curve of Scn1a,Scn8a and Ank3 were all ***3 transcription was interfered and the relative Ank3 mRNA levels of the three interfered groups compared to GAPDH were 0.89±0.13,0.52±0.07 and 0.26±0.05 while that of the negative control group was 1.01±0.08(P<0.05).When Ank3 transcription was inhibited by siRNA,the relative mRNA levels of Scn8a decreased in the three groups(0.91±0.09,0.33±0.06 and 0.25±0.05),compared to the negative control group(1.10±0.09).Tested by Western blotting,protein levels of ankyrinG and Nav1.6 decreased after ***-G in negative control group,group1,group2 and group1+2 were 0.813±0.051,0.744±0.041,0.477±0.055 and 0.351±0.190 respectively(P<0.01)while Nav1.6 were 0.934±0.036,0.867±0.078,0.498±0.070 and 0.586±0.180(P<0.01).The quantity analysis of immunofluorescence showed significant decrease of ankyrin-G and Nav1.6(Student’s test,P=0.046 and 0.016 respectively).Conclusion:We therefore concluded that in HT22 cells the expression of Nav1.6 was down-regulated by Ank3 RNA interference.

关键词： Nav1.1 Nav1.6 Ankyrin-G Hippocampal neurons HT22