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配电网运行情况分析及智能运维决策生成研究

供用电 2021年第2期38卷 26-32页

作者：田野朱义东刘一涛王刚李胜川王剑史可鉴赵志阳国网辽宁省电力有限公司电力科学研究院辽宁沈阳110006 国网辽宁省电力有限公司辽宁沈阳110005 国网辽宁省电力有限公司沈阳供电公司辽宁沈阳110005

为准确高效地掌握配电网运行情况,发现薄弱环节,并制定具有针对性、可行性的精准运维策略,提出了配电网运行情况分析及智能运维决策生成框架与系统。该框架基于现有配电网运行管理系统、生产管理系统(production management system,PMS)... 详细信息

为准确高效地掌握配电网运行情况,发现薄弱环节,并制定具有针对性、可行性的精准运维策略,提出了配电网运行情况分析及智能运维决策生成框架与系统。该框架基于现有配电网运行管理系统、生产管理系统(production management system,PMS)等,集成配电网设备台账、运行、故障统计等多方面数据,通过对各级单位的设备、线路等运行情况进行横向、纵向统计分析,直观地展现各单位目前的薄弱环节以及需要重视的环节,清楚地呈现了配电网实际情况与健康程度。同时,基于所分析的数据,生成配电网差异化运维策略预案,并通过预案落实及实践反馈不断优化策略,为今后配电网精准运维管理提供了参考。

关键词：配电网运行配电网故障智能运维决策精准决策制定差异化运维

Genome-wide analysis of soybean DnaJA-family genes and functional characterization of GmDnaJA6 responses to saline and alkaline stress

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The Crop Journal 2023年第4期11卷 1230-1241页

作者： Binshuo Zhang Zhen Liu Runnan Zhou Peng Cheng Haibo Li zhiyang Wang Ying Liu Mingyang Li Zhenqing zhao Zhenbang Hu Qingshan Chen Xiaoxia Wu Ying zhao College of Agriculture Northeast Agricultural UniversityHarbin 150030HeilongjiangChina

Plant Dna JA proteins act as molecular chaperones in response to environmental *** purpose of this study was to characterize the function and regulatory mechanisms of Dna JA genes in *** expression profiles in various soybean tissues at various stages of development indicated that Gm Dna JAs function in the coordination of stress and plant hormone *** Dna JA6 was identified as a candidate regulator of saline and alkaline stress resistance and Gm Dna JA6 overexpression lines showed increased soybean saline and alkaline *** J interacted with Hsp70,and Gm Hsp70 increased the saline and alkaline tolerance of plants with chimeric soybean hairy roots.

关键词： Soybean Heat shock proteins DnaJ Salt stress Alkali stress

Hierarchical carbon nanocages as high-rate anodes for Li-and Na-ion batteries

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Nano Research 2015年第11期8卷 3535-3543页

作者： zhiyang Lyu Lijun Yang Dan Xu Jin zhao Hongwei Lai Yufei Jiang Qiang Wu Yi Li Xizhang Wang Zheng Hu Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China

Novel hierarchical carbon nanocages （hCNCs） are proposed as high-rate anodes for Li- and Na-ion batteries. The unique structure of the porous network for hCNCs greatly favors electrolyte penetration, ion diffusion, electron conduction, and structural stability, resulting in high rate capability and excellent cyclability. For lithium storage, the corresponding electrode stores a steady reversible capacity of 970 mAh·g^-1 at a rate of 0.1 A·g^-1 after 10 cycles, and stabilizes at 229 mAh·g^-1 after 10,000 cycles at a high rate of 25 A·g^-1（33 s for full-charging） while delivering a large specific power of 37 kW·kgelectrode^-1 and specific energy of 339 Wh·kgelectrode^-1. For sodium storage, the hCNC reaches a high discharge capacity of -50 mAh·g^-1 even at a high rate of 10 A·g^-1.

关键词： hierarchical carbon nanocages lithium-ion batteries sodium-ion batteries anode high rate capability

2012-2021年深圳市宝安区6岁及以上人群手足口病流行特征分析

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预防医学论坛 2023年第4期29卷 264-268页

作者：陈春艳李淑珍赵执扬李静刘金凤夏挺松陈亿雄深圳市宝安区疾病预防控制中心传染病防制科广东518101 山西医科大学公共卫生学院统计学教研室

目的分析2012-2021年深圳市宝安区≥6岁人群手足口病流行病学特征,为该年龄段手足口病的防控提供依据。方法收集2012-2021年深圳市宝安区≥6岁人群手足口病的报告资料,采用描述性流行病学方法分析该区≥6岁人群手足口病的三间(时间、... 详细信息

目的分析2012-2021年深圳市宝安区≥6岁人群手足口病流行病学特征,为该年龄段手足口病的防控提供依据。方法收集2012-2021年深圳市宝安区≥6岁人群手足口病的报告资料,采用描述性流行病学方法分析该区≥6岁人群手足口病的三间(时间、人群和地区)分布特征。结果 2012-2021年,深圳市宝安区共报告≥6岁人群手足口病5 226例,年均报告发病率为10.45/10万。≥6岁人群手足口病构成比由2012年的1.54%(14/912)增加至2021年的9.23%(687/7 440);不同性别之间≥6岁人群手足口病的报告发病率差异有统计学意义(χ^(2)=106.41,P<0.05),男性手足口病发病率多于女性;发病人群中年龄最大为82岁,≥6岁发病人群中以6~18岁居多,占87.47%(4 571/5 226)。不同年份之间≥6岁人群手足口病发病率差异有统计学意义(χ^(2)=1 949.79,P<0.05);2014-2019年和2021年手足口病发病率特征具有典型的季节性(双峰型分布),而2012、2013和2020年只有一个高峰。不同街道之间≥6岁人群手足口病的发病率差异有统计学意义(χ^(2)=1 520.90,P<0.05),年均发病率最高为新安街道(23.18/10万)、最低为松岗街道(4.14/10万)。结论 2012-2021年深圳市宝安区≥6岁人群手足口病构成比呈上升趋势,男性发病率较高;春夏季为主要高发季节;新安街道人群手足口病发病率最高。

关键词：手足口病流行病学三间分布发病率

Rapid and label-free classification of pathogens based on light scattering,reduced power spectral features and support vector machine

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Chinese Chemical Letters 2020年第12期31卷 3163-3167页

作者： Mubashir Hussain Zhen Chen Mu Lv Jingyi Xu Xiaohan Dong Jingzhou zhao Song Li Yan Deng Nongyue He zhiyang Li Bin Liu State Key Laboratory of Bioelectrontics School of Biological Science and Medical Engineering.Southeast UniversityNanjing 210096China Key laboratory of Clinical and Medical Engineering Department of Biomedical EngineeringSchool of Biomedical Engieering and lnformaticsNanjingMedical UniversiryNanjing 211166China Department of Clinical Laboratory The Affliated Drum Tower Hospital of Nanjing University Medical SchoolNanjing 210008China Hunan Key Laboratory of Biomedical Nanomaterials and Devices Hunan University of TechnologyZhuzhou 412007China

The rapid identification of pathogens is crucial in controlling the food quality and *** proposed system for the rapid and label-free identification of pathogens is based on the principle of laser scattering from the bacterial *** clinical prototype consists of three parts:the laser beam,photodetectors,and the data acquisition *** bacterial testing sample was mixed with 10 mL distilled water and placed inside the machine *** the bacterial microbes pass by the laser beam,the scattering of light occurs due to variation in size,shape,and *** to this reason,different types of pathogens show their unique light scattering *** photo-detectors were arranged at the surroundings of the sample at different angles to collect the scattered *** photodetectors convert the scattered light intensity into a voltage *** waveform features were acquired by using the power spectral characteristics,and the dimensionality of extracted features was reduced by applying minimal-redundancy-maximal-relevance criterion(mRMR).A support vector machine(SVM)classifier was developed by training the selected power spectral features for the classification of three different bacterial *** resulting average identification accuracies of ***,*** and *** were 99%,87%,and 94%,*** ove rall experimental results yield a higher accuracy of 93.6%,indicating that the proposed device has the potential for label-free identification of pathogens with simplicity,rapidity,and cost-effectiveness.

关键词： Pathogens identification Laser light scattering Features reduction Support vector machines Waveform features extraction

High-performance non-Fermi-liquid metallic thermoelectric materials

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npj Computational Materials 2023年第1期9卷 1943-1949页

作者： Zirui Dong Yubo Zhang Jun Luo Ying Jiang zhiyang Yu Nan zhao Liusuo Wu Yurong Ruan Fang Zhang Kai Guo Jiye Zhang Wenqing Zhang School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Department of Materials Science and Engineering Department of Physicsand Shenzhen Institute for Quantum Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Shenzhen Municipal Key-Lab for Advanced Quantum Materials and Devices and Guangdong Provincial Key Lab for Computational Science and Materials DesignSouthern University of Science and TechnologyShenzhen 518055China Materials Genome Institute Shanghai UniversityShanghai 200444China State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350002China School of Physics and Materials Science Guangzhou UniversityGuangzhou 510006China

Searching for high-performance thermoelectric(TE)materials in the paradigm of narrow-bandgap semiconductors is hampered by a *** we report on the discovery of metallic compounds,TiFe_(x)Cu_(2x−1)Sb and TiFe1.33Sb,showing the thermopower exceeding many TE semiconductors and the dimensionless figure of merits zTs comparable with the state-of-the-art TE materials.A quasi-linear temperature(T)dependent electrical resistivity in 2–700 K and the logarithmic T-dependent electronic specific heat at low temperature coexist with the high thermopower,highlighting the strong intercoupling of the non-Fermi-liquid(NFL)quantum critical behavior of electrons with TE *** structure analysis reveals a competition between the antiferromagnetic(AFM)ordering and Kondo-like spin compensation as well as a parallel two-channel Kondo *** T-dependent magnetic susceptibility agrees with the quantum critical scenario of strong local *** work demonstrates the correlation among high TE performance,NFL quantum criticality,and magnetic fluctuation,which opens up directions for future research.

关键词： materials metallic Fermi

Generalized Demodulation Transform for Bearing Fault Diagnosis Under Nonstationary Conditions and Gear Noise Interferences

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Chinese Journal of Mechanical Engineering 2019年第1期32卷 79-89页

作者： Dezun zhao Jianyong Li Weidong Cheng zhiyang He Department of Mechanical Engineering Tsinghua University School of Mechanical Electronic and Control Engineering Beijing Jiaotong University Key Laboratory of Vehicle Advanced Manufacturing Measuring and Control Technology Ministry of Education

It is a challenging issue to detect bearing fault under nonstationary conditions and gear noise interferences. Meanwhile, the application of the traditional methods is limited by their deficiencies in the aspect of computational accuracy and e ciency, or dependence on the tachometer. Hence, a new fault diagnosis strategy is proposed to remove gear interferences and spectrum smearing phenomenon without the tachometer and angular resampling technique. In this method, the instantaneous dominant meshing multiple(IDMM) is firstly extracted from the time-frequency representation(TFR) of the raw signal, which can be used to calculate the phase functions(PF) and the frequency points(FP). Next, the resonance frequency band excited by the faulty bearing is obtained by the band-pass filter. Furthermore, based on the PFs, the generalized demodulation transform(GDT) is applied to the envelope of the filtered signal. Finally, the target bearing is diagnosed by matching the peaks in the spectra of demodulated signals with the theoretical FPs. The analysis results of simulated and experimental signal demonstrate that the proposed method is an e ective and reliable tool for bearing fault diagnosis without the tachometer and the angular resampling.

关键词： Bearing fault diagnosis Generalized demodulation transform Nonstationary conditions Gear noise

Cosmogenic^(10)Be dating of the oldest moraine in the Hengduan Mountains

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Science China Earth Sciences 2023年第10期66卷 2211-2223页

作者： Zhigang ZHANG Jiahong ZHENG Haitao CUI Zhijun zhao Xinggong KONG Chaogang ZHENG Hong ZHANG Fei GUO zhiyang CHANG Xue YUAN Mingyang YAN Jie ZHANG Jian WANG School of Geography Nanjing Normal UniversityNanjing210023China Key Laboratory of Virtual Geographic Environment(Nanjing Normal University) Ministry of EducationNanjing210023China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing210023China Tourism and Social Administration College NanJing XiaoZhuang UniversityNangjing211171China

The Hengduan Mountains is in the transitional zone between the Qinghai-Tibet Plateau(QTP)and the YunnanGuizhou Plateau in China,and a key area for elucidating the Quaternary environmental changes in *** paleo-Daocheng ice cap was located on the Shaluli Hilly Plateau in the northeastern Hengduan Mountains,the oldest moraines in the Hengduan Mountains region were found in the ice cap *** glacial landforms provide key evidence to study the timing when this area entered the cryosphere with the uplift of the ***,it is difficult to collect suitable glacial boulders from these moraines for traditional terrestrial in-situ cosmogenic nuclide(TCN)exposure dating because of long-term severe moraine ***,we collected clast samples from the moraine surface and depth profile to constrain the age of the oldest moraine in Kuzhaori(moraine E)using TCN^(10)Be dating *** minimum^(10)Be ages of five clast samples from the moraine surface range from 187.4±1.5 to 576.8±4.3 ka,implying that the moraine has been seriously degraded since *** on the TCN^(10)Be concentrations of the samples from a depth profile and simulations,the exposure-erosion-inheritance history of the profile was *** fitting to the profile^(10)Be concentrations using the chi-square test,the simulations yielded a reliable age of 626.0±52.5 ka for the ***,the oldest moraine(moraine E)in Kuzhaori was most likely formed at about 0.63Ma ago,corresponding to the marine isotope stage(MIS)*** glaciation represents the maximum Quaternary glaciation after the QTP was elevated into the cryosphere by the Kunlun-Yellow River Tectonic Movement.

关键词： Hengduan Mountains Paleo-Daocheng ice cap Terrestrial in-situ cosmogenic nuclide^(10)Be Depth profile Exposure dating

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基于热带法测量低熔点固体的导热系数

物理实验 2024年第3期44卷 54-61页

作者：谢知言童童崔文骥刘志洋陈玉旻刘德华赵述敏西安交通大学物理学院陕西西安710049

稳态法测量导热系数的实验原理明晰,但测试时间长,且不便于测量低熔点样品;热带法是用同一条带状金属同时充当热源和温度传感器并实现导热系数高效测量的方法.基于热带法,设计了瞬态导热系数测试装置,搭建了包括测试电路和制冷系统在内... 详细信息

稳态法测量导热系数的实验原理明晰,但测试时间长,且不便于测量低熔点样品;热带法是用同一条带状金属同时充当热源和温度传感器并实现导热系数高效测量的方法.基于热带法,设计了瞬态导热系数测试装置,搭建了包括测试电路和制冷系统在内的实验平台,并基于高斯-牛顿迭代法处理实验数据.性能测试结果表明:热带传感特性线性度较好,单次测试时间只需约30 s,平台可提供-15~0℃的低温测试环境,可对较低熔点的样品进行测量.从热带因存在热容吸热、热带端部的热量逸散和匹配电阻的温漂给出了减少导热系数测量偏差的措施.

关键词：导热系数热带法低熔点固体