Results 1 to 10 of about 27,143 (131)
Zhejiang Daxue xuebao. Lixue ban, 2016 广义多项时间分数阶扩散方程已被用于描述一些重要的物理现象，目前，有关该类方程在高维情形下满足混合边界条件的研究仍较少.利用分离变量法考虑有界区域上广义二维多项时间分数阶扩散方程，方程中关于时间变量的分数阶导数采用Caputo分数阶导数的定义，其阶分别定义在[0，1]，[1，2].而关于空间变量的偏导数则定义为传统的整数阶导数（二阶），得到了有界区域上广义二维多项时间分数阶扩散方程满足非齐次混合边界条件的解析解.亦可用于求解其他类型的满足不同边界条件的分数阶微分方程的解析解.
WANGXuebin(王学彬)
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Zhejiang Daxue xuebao. Lixue ban, 2015 以浙南洞头沿海海域的一次赤潮过程为例，对其爆发过程中气象因素影响特征进行了分析，重点分析了气象要素、天气形势对洞头沿海赤潮发生过程的影响.分析表明：气象因素对赤潮灾害的发生和消亡有较大影响，特别是气温、降水、风和气压等的影响作用十分明显，对赤潮的发生、发展起到重要作用.而此次过程中，风的要素对赤潮过程的影响最为突出.同时高空环流形势的转折变化，也直接影响这次赤潮过程的发生、发展.当环流形势稳定时，赤潮生物的海洋生存环境就稳定，赤潮得以持续；反之，当大气环流状态改变时，赤潮发生、发展过程也会受到影响.
FUshenghui(符生辉) +4 more
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Looking at Us Through Their Eyes. The Analytical Process from Ethnographic Perspectives1
Journal of Analytical Psychology, EarlyView.Abstract This article looks at the analytical situation through the Others’ eyes—through examples from contemporary ethnographies of foreign cultures. It discusses the following issues: a) The analogy between the ontological worlds of the dead, ghosts, animals and dreams in “primitive populations” and the analytical psychological descriptions of the ...
Stefano Carta
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Methods in Ecology and Evolution, EarlyView.Abstract Elliptic Fourier analysis (EFA) is often employed in geometric morphometrics (GM), but the normalization of elliptic Fourier descriptor (EFD) has persistently posed challenges for obtaining unique and comparable results, especially in the application of outline‐based GM methods, which limits the implementation in automated analysis of numerous,
Hui Wu +6 more
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Drivers of bat researchers’ intent to adopt field hygiene practices
Conservation Biology, EarlyView.Abstract Infectious disease is a growing threat to wildlife, with zoonotic transmission most likely at the human–wildlife interface. One underappreciated activity at this interface is fieldwork with wild animals, but associated risks can be mitigated through field hygiene (FH) practices, such as using personal protective equipment and other appropriate
Joanna L. Coleman +6 more
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Estimating the total mortality of seabirds following a marine heat wave
Conservation Biology, EarlyView.Abstract Marine heat waves detrimentally affect a range of marine species, including seabirds, and are increasing in frequency and severity. When thousands of dead seabirds wash up on beaches, the public becomes concerned. However, the number of dead birds recorded on beaches is only a fraction of the total mortality; most birds perish at sea.
Jennifer L. Lavers +3 more
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Gaoya dianqi, 2023 单相重合闸动作于永久性故障时，瞬态恢复电压（transient recovery voltage,TRV）的峰值远超国标值。文中以超高压示范工程线路为背景，利用ATP-EMTP模拟重合闸失败导致断路器二次开断的情况，分析重合闸最危险投切时间范围，结合短路电流分析断路器开断过程的3个阶段对TRV特性的影响，并针对加装方式、投切时间、阻值等不同因素分析分闸电阻对TRV的抑制效果。仿真结果表明：重合闸动作时间影响TRV峰值，动作于永久性故障时最严重工况的TRV高达1 153.1、1 699.4 kV ...
董彦辰 +6 more
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Conservation Biology, EarlyView.Abstract Procedural, distributional, recognitional, and epistemic justice aspects of conservation interventions are well documented in contexts where pastoralism is a key livelihood and way of life. Geospatial analyses and representations of wildlife conservation and restoration that are increasingly applied in pastoralist rangeland socioecological ...
Ryan R. Unks
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Jianzhu Gangjiegou Jinzhan, 2011 本文综合采用静力分析法和时程分析法,对预应力单层索网幕墙进行了设计和分析。时程分析法是以风洞试验结果为基础,将风荷载时程作为外施荷载时程作用于有限元模型上,采用瞬态分析方法得出结构的动力响应,从而解决了风振系数无法准确取值的难题。
季俊杰 +4 more
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Uncovering correlates of decline and critical refuges for a threatened terrestrial mammal
Conservation Biology, EarlyView.Abstract Globally, the geographic ranges of numerous species are contracting. Identifying spatiotemporal patterns of threat impact can illuminate why species decline in some parts of their range but persist in others. We developed a correlative approach to identify species’ response thresholds and locate ecological refuge areas associated with ...
Natalya M. Maitz +5 more
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