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| 1 | 基于微型PMU的配电线路抗差参数辨识显示文摘微型相量测量单元装置为智能配电网提高可观性和可控性提供了基础。研究了基于微型相量测量单元的配电网线路参数抗差辨识方法:针对配电网三相运行不对称的情况,构建了基于相分量描述的配电线路三相π型等值模型,结合微型相量测量单元提供的多组线路两端电压、电流相量数据,提出了基于相分量模型的、适应配电网不对称运行的最小二乘线路参数辨识方法;并引入2种抗差方法,一种为基于Huber估计的抗差最小二乘法,另一种为基于中位数估计的抗差最小二乘法。在中性点经消弧线圈或小电阻接地系统中,所提方法仅需要线路两端的电压和电流相量即可在辨识线路相参数的同时获得线路正序和零序参数;在中性点不接地系统中,由于没有零序电流分量,当系统正常运行时所提方法可辨识线路正序参数。算例仿真验证了所提方法的有效性,并比较了2种抗差方法在辨识精度、计算耗时方面的优劣,结果表明,基于中位数估计的抗差最小二乘法的抗差性能更好,计算时间较短。 | 薛安成 徐飞阳 游宏宇 徐劲松 Kenneth E.Martin 毕天姝 | 2019 | 电力自动化设备2019，39，2： | 13 |
| 2 | 蒂姆·布朗:拥抱未知显示文摘问:(在1983年您关于设计的第一篇文章中)您写道:'对于某种技能高度熟练的掌握,如渲染或者模型制作,会让创作者被平庸的解决方案所蛊惑。'我感觉这是您在《设计改变一切》这本书中想要表达的关键问题,对吗?So,you wrote,'A great proficiency in a certain skill,such as rendering or model-making,has allowed a mediocre solution to seduce those for whom it was produced'.Which I feel like is actually central to your book,'Change by Design',right? | Courtney E.Martin(采访) 王曦(译) | 2022 | 设计艺术研究2022，12，2： | 1 |
| 3 | A novel class of microbial phosphocholine‐specific phospholipases C显示文摘 | Martin J.Stonehouse AdelaCota‐Gomez Sarah K.Parker Wesley E.Martin Joseph A.Hankin Robert C.Murphy WeibinChen Kheng B.Lim MurrayHackett Adriana I.Vasil Michael L.Vasil | 2002 | Molecular Microbiology2002，，3： | 1 |
| 4 | 机械手应用中的十大误区显示文摘机械手技术应用日益广泛起来,然而,如何选购合适的机械手设备却是困扰很多用户的难题。根据笔者经验,本文总结了当前选购与应用机械手时最容易陷入的十大误区。 | George E.Martin | 2005 | 现代制造2005，，24： | 0 |
| 5 | 火山来了,蛇颈龙快跑!显示文摘7000万年前的海洋,温暖、清澈、暗藏杀机;7000万年后的南极,一条完整的小蛇颈龙从冰封大地中醒来。听,故事从2亿年前开始。 | 昱川 James E.Martin | 2007 | 小哥白尼(趣味科学)2007，，4： | 0 |
| 6 | Balanced and Unbalanced Components of Moist Atmospheric Flows with Phase Changes显示文摘Atmospheric variables(temperature, velocity, etc.) are often decomposed into balanced and unbalanced components that represent low-frequency and high-frequency waves, respectively. Such decompositions can be defined, for instance, in terms of eigenmodes of a linear operator. Traditionally these decompositions ignore phase changes of water since phase changes create a piecewise-linear operator that differs in different phases(cloudy versus non-cloudy). Here we investigate the following question: How can a balanced–unbalanced decomposition be performed in the presence of phase changes? A method is described here motivated by the case of small Froude and Rossby numbers,in which case the asymptotic limit yields precipitating quasi-geostrophic equations with phase changes. Facilitated by its zero-frequency eigenvalue, the balanced component can be found by potential vorticity(PV) inversion, by solving an elliptic partial differential equation(PDE), which includes Heaviside discontinuities due to phase changes. The method is also compared with two simpler methods: one which neglects phase changes, and one which simply treats the raw pressure data as a streamfunction. Tests are shown for both synthetic, idealized data and data from Weather Research and Forecasting(WRF) model simulations. In comparisons, the phase-change method and no-phase-change method produce substantial differences within cloudy regions, of approximately 5K in potential temperature, due to the presence of clouds and phase changes in the data. A theoretical justification is also derived in the form of a elliptic PDE for the differences in the two streamfunctions. | Alfredo N.WETZEL Leslie M.SMITH Samuel N.STECHMANN Jonathan E.MARTIN | 2019 | Chinese Annals of Mathematics,Series B2019，40，6： | 0 |
| 7 | 讲故事与授课艺术显示文摘讲故事是一种原始的授课方法。但如今仍有一些团体在那里运用讲故事这一种授课方式。尽管人们作出过许多努力,譬如运用电视形式来摸拟或更新这种授课方法,但是生动的讲故事的方式永远不会过时。这种简单的讲故事形式永远是授课艺术的基础。学生在听故事中获得了一种强烈的,真实的,人与人之间交流语言的体验。 | E.Martin Pedersen 王树刚 | 1995 | 外语教学理论与实践1995，，3： | 0 |
| 8 | Assessing the performance of YOLOv5 algorithm for detecting volunteer cotton plants in corn fields at three different growth stages显示文摘The feral or volunteer cotton(VC)plants when reach the pinhead squaring phase(5–6 leaf stage)can act as hosts for the boll weevil(Anthonomus grandis L.)pests.The Texas Boll Weevil Eradication Program(TBWEP)employs people to locate and eliminate VC plants growing by the side of roads or fields with rotation crops but the ones growing in the middle of fields remain undetected.In this paper,we demonstrate the application of computer vision(CV)algorithm based on You Only Look Once version 5(YOLOv5)for detecting VC plants growing in the middle of corn fields at three different growth stages(V3,V6 and VT)using unmanned aircraft systems(UAS)remote sensing imagery.All the four variants of YOLOv5(s,m,l,and x)were used and their performances were compared based on classification accuracy,mean average precision(mAP)and F1-score.It was found that YOLOv5s could detect VC plants with maximum classification accuracy of 98%and mAP of 96.3%at V6 stage of corn while YOLOv5s and YOLOv5m resulted in the lowest classification accuracy of 85%and YOLOv5m and YOLOv5l had the least mAP of 86.5%at VT stage on images of size 416×416 pixels.The developed CV algorithm has the potential to effectively detect and locate VC plants growing in the middle of corn fields as well as expedite the management aspects of TBWEP. | Pappu Kumar Yadav J.Alex Thomasson Stephen W.Searcy Robert G.Hardin Ulisses Braga-Neto Sorin C.Popescu Daniel E.Martin Roberto Rodriguez Karem Meza Juan Enciso Jorge Solórzano Diaz Tianyi Wang | 2022 | Artificial Intelligence in Agriculture2022，，1： | 0 |
| 9 | EEG/ERP evidence of possible hyperexcitability in older adults with elevated beta-amyloid显示文摘Background: Although growing evidence links beta-amyloid (Aβ) and neuronal hyperexcitability in preclinical mouse models of Alzheimer’s disease (AD), a similar association in humans is yet to be established. The first aim of the study was to determine the association between elevated Aβ (Aβ+) and cognitive processes measured by the P3 event-related potential (ERP) in cognitively normal (CN) older adults. The second aim was to compare the event- related power between CNAβ+ and CNAβ−. Methods: Seventeen CNAβ+ participants (age: 73 ± 5, 11 females, Montreal Cognitive Assessment [MoCA] score 26 ± 2) and 17 CNAβ- participants group-matched for age, sex, and MOCA completed a working memory task (n-back with n = 0, 1, 2) test while wearing a 256-channel electro-encephalography net. P3 peak amplitude and latency of the target, nontarget and task difference effect (nontarget−target), and event-related power in the delta, theta, alpha, and beta bands, extracted from Fz, Cz, and Pz, were compared between groups using linear mixed models. P3 ampli-tude of the task difference effect at Fz and event-related power in the delta band were considered main outcomes. Correlations of mean Aβ standard uptake value ratios (SUVR) using positron emission tomography with P3 amplitude and latency of the task difference effect were analyzed using Pearson Correlation Coefficient r. Results: The P3 peak amplitude of the task difference effect at Fz was lower in the CNAβ+ group (P = 0.048). Simi-larly, power was lower in the delta band for nontargets at Fz in the CNAβ+ participants (P = 0.04). The CNAβ+ partici-pants also demonstrated higher theta and alpha power in channels at Cz and Pz, but no changes in P3 ERP. Strong correlations were found between the mean Aβ SUVR and the latency of the 1-back (r = − 0.69;P = 0.003) and 2-back (r = − 0.69;P = 0.004) of the task difference effect at channel Fz in the CNAβ+ group. Conclusions: Our data suggest that the elevated amyloid in cognitively normal older adults is associated with neuronal hyperexcitability. The decreased P3 task difference likely reflects early impairments in working memory processes. Further research is warranted to determine the validity of ERP in predicting clinical, neurobiological, and functional manifestations of AD. | Hannes Devos Kathleen Gustafson Ke Liao Pedram Ahmadnezhad Bradley Estes Laura E.Martin Jonathan D.Mahnken William M.Brooks Jeffrey M.Burns | 2022 | Translational Neurodegeneration2022，11，1： | 0 |
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