Results 21 to 30 of about 37,045 (159)
Force-induced phase behavior of polymer chains(外力诱导下的高分子链相变)
Zhejiang Daxue xuebao. Lixue ban, 2009 采用nPERMis(new pruned-enriched rosenbluth method with importance sampling）算法,研究了吸附在表面的高分子链在外力诱导下的相变行为.以链长N = 60的高分子链为例,在外力的作用下相变临界温度比没有外力作用的相变临界温度要低,并随外力的增大相变临界温度降低,但比热容峰值会增大.当外力f= 1.0或者1.5时,在高温区域高分子链形状发生较大变化,但在低温区由于高分子链内部相互作用和界面的吸附作用 ...
YANGZhi-yong(杨志勇) +1 more
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Gaoya dianqi, 2022 变压器外部噪声控制系统对提升变电站声环境质量具有重要意义。噪声控制系统的布放位置和结构参数选择需要依据变压器空间噪声的干涉衰减和频谱特性。目前对变压器不同位置噪声干涉衰减规律的研究很少。文中测量了山西省内某1 000 kV特高压变压器噪声，研究了变压器A、B、C相以及AB、BC相中间位置噪声干涉衰减规律。变压器A、B、C相声压级随测量点到变压器立面距离增加单调下降，略有波动，分为快衰减段和慢衰减段。变压器AB、BC相中间位置，由于近场干涉作用出现明显的振荡段。在振荡段高频分量单调下降 ...
张超, 刘国强, 芦竹茂, 俞华
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An urban evolved invasive plant tolerates experimental climate change
PLANTS, PEOPLE, PLANET, EarlyView.Urbanization may drive invasive species evolution, resulting in greater invasion risks as global conditions change. We compared urban populations of the invasive Erigeron annuus in Zagreb, Croatia, to surrounding rural populations and found that urban‐evolved populations were more tolerant of experimental warming and drought than rural populations ...
S. Luke Flory +4 more
wiley +1 more source
Dizhen xuebao, 2020 在合成孔径雷达干涉测量中，干涉相干是局部干涉条纹质量的重要评价标准，但是由于各种失相干源的影响，会出现失相干现象，而这可能会丢失重要的形变数据。本文首先利用ENVISAT ASAR的两景影像获得了2009年意大利拉奎拉MW6.3地震的带有失相干现象的同震形变场，对数据预处理后再使用移动窗口克里金法对拉奎拉地震的同震形变场进行插值处理，恢复了形变图的失相干区域，之后进一步通过正反演获得同震形变场，并与上一步的插值结果进行对比分析。结果显示，插值结果与反演结果在极震区吻合得很好 ...
Jintian Li +3 more
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PLANTS, PEOPLE, PLANET, EarlyView.The effect of air pollution on plants is still underexplored, especially belowground. We used a field facility that released diesel exhaust and ozone at concentrations equivalent to those near a busy road in Reading, UK, to measure belowground gas exchange of Scots pine together with feeding by large pine weevils, a major pest of conifers.
Tihomir Simin +7 more
wiley +1 more source
Wildlife Letters, EarlyView.We examined changes in perceived risks associated with chronic wasting disease (CWD) and perceived trust in wildlife agencies over time across 10 studies in eight states. Results indicated that perceived risks to both deer and humans declined the longer the disease had been in a state. Results also indicated that agency trust evaluations were positive,
Jerry J. Vaske, Craig A. Miller
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Wildlife Letters, EarlyView.Climate change drives shifts in suitable habitats for Eurasian lynx and its prey (hare, roe deer) in Mohe, Daxing'anling Mountains. Under RCP scenarios, moderate warming (RCP4.5) promotes substantial habitat expansion, while high‐emission conditions (RCP8.5) lead to strong expansion in the 2050s but slower gains and partial contraction by the 2070s ...
Binglian Liu +5 more
wiley +1 more source
Wildlife Letters, EarlyView.Using radiotelemetry, we found that the movement and home range of the endangered Sacalia bealei varied significantly across reproductive classes and seasons, with males exhibiting greater movement than females during wet and mating seasons. The species exhibits strong aquatic dependence, favoring deep pools interspaced among riffle‐pool sequences ...
Wing Sing Chan +3 more
wiley +1 more source
四川大学学报. 自然科学版, 2004 作者利用电阻法和伸长率 温度曲线的测试,研究了R相变和马氏体相变对TiNi记忆合金双向记忆效应(TWSME)的贡献,并研究了热机械训练对相变特征的影响.研究结果表明,热机械训练可导致降温时R相的出现,并且R相变对双向记忆效应的贡献远大于马氏体相变的贡献.在双向记忆效应训练过程中,由于位错的引入,能引起相变点Ms,Mf,Rs,As和Af的下降.
封向东 +4 more
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Zhejiang Daxue xuebao. Lixue ban, 2007 为了使ZGB模型结果更接近实验中没有O的中毒态，利用改进的ZGB模型模拟化学反应.应用蒙特卡罗模拟方法研究考虑次近邻格点参与化学反应的ZGB模型的相图.观察到一级相变点值变大，二级相变点值变小，反应窗口变宽.模拟得到相图更接近实验，加深和拓宽了对ZGB模型吸附机制的理解和掌握，同时对非平衡态物理的内在规律有了进一步的认识.
GANKe-chong(淦克冲) +2 more
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