Results 121 to 130 of about 622,498 (214)

Predictive evolutionary genomics: principles, validation, and practice

open access: yesNew Phytologist, Volume 252, Issue 1, Page 36-48, October 2026.
Summary Climate change and habitat loss are driving rapid evolutionary responses in populations world‐wide, which creates an urgent need for evolutionary forecasting in conservation and agriculture. Such forecasting can be categorized into three time scales: trait‐based models that use multivariate quantitative genetic equations to project correlated ...
Daniel Ortiz‐Barrientos   +5 more
wiley   +1 more source

稀疏晶场作用的键无规BC模型的相变特性

open access: yes四川大学学报. 自然科学版, 2010
运用切断近似的方法,在有效场框架下,对稀疏晶场作用的键无规Blume-Capel(BC)模型的相变进行了研究.具体分析了三种键无规分布的BC模型.分别探讨了系统三临界点(TCP)随稀疏晶场和键无规这两种无序因子的变化关系及相变曲线呈现的一些新特征,对不同键无规分布的BC模型的相图进行了比较,并给出相应的相图.
朱海霞, 晏世雷
doaj  

Can Online Participation Match In‐Person Democratic Engagement? Evidence From a Cross‐National Experiment

open access: yesPolicy &Internet, Volume 18, Issue 3, September 2026.
ABSTRACT Democratic innovations increasingly take place online, yet little is known about how online citizen participation affects perceived legitimacy compared to in‐person formats. This study presents findings from a preregistered vignette experiment conducted in Spain and Switzerland.
Valeria Vuk
wiley   +1 more source

相对论q形变理想费米气体的低温热力学统计性质(英文)

open access: yes四川大学学报. 自然科学版, 2009
在q形变费米-狄拉克分布函数的基础上,研究了相对论q形变理想费米气体的低温热力学统计性质,得到了一些重要热力学量例如费米能,基态能,化学势,总能和热容量的解析表达式,揭示了q形变参数和相对论对系统性质的影响.结果表明:q形变导致了一些与正常的系统不同的新奇特性,另外,相对论费米系统的性质与非相对论系统的性质明显不同.
刘慧, 门福殿, 章毛连, 王玉连
doaj  

Whose Digital Future? Civil Society and Alternative Imaginaries in Transnational Digital Governance

open access: yesPolicy &Internet, Volume 18, Issue 3, September 2026.
ABSTRACT This article investigates different visions of digital futures, examining how desired futures are discursively constructed within civil society in transnational digital governance. The analysis builds on discourse theory and a growing body of research on imaginaries in digital governance.
Outi Puukko
wiley   +1 more source

行星锥盘无级变速器的传动比和受力分析

open access: yesJixie chuandong, 1990
本文根据相对运动的原理,给整个行星传动加上一个与转臂角速度大小相等而方向相反的角速度,于是转臂可视为静止不动,转化为定轴传动,即转化机构;这样既不改变各构件间的相对运动,也不改变各构件间的受力关系,因此本文在这基础上计算行星锥盘无级变速器的传动比,分析这种变速机在恒功率、恒转矩时各摩擦轮上的作用力,并附有例题。
冯澄宙
doaj  

一种复合定形相变储热材料及其制备方法

open access: yes, 2014
本发明涉及一种复合定形相变储热材料及其制备方法,属于复合材料技术领域。该复合材料以多孔材料为支撑材料,无机水合盐为相变材料,通过多孔材料的毛细吸附作用及表面活性剂的自组装将无机水合盐吸附入支撑材料的多孔结构中制备而成。本发明首先通过表面活性剂的乳化分散作用将熔融的无机水合盐相变材料如六水合氯化钙在超声条件下乳化分散,形成稳定的乳液;然后将膨胀石墨加入乳液中,分散均匀,并将其放入真空烘箱中,抽真空,室温下恒定30min,从而制得相变潜热高 ...
徐芬   +5 more
core  

Trust in the Machine? Practitioner Perspectives on the Role of AI in Online Content Moderation

open access: yesPolicy &Internet, Volume 18, Issue 3, September 2026.
ABSTRACT The scale and volume of user‐generated content produced in the Web 2.0 era have led to content moderation becoming an essential aspect of most online platforms' business models. This form of digital labour is often performed by human content moderators (CMs) in the Global South, however, artificial intelligence (AI) technology has increasingly
Elena Martellozzo   +4 more
wiley   +1 more source

电力变压器绕组短路瞬态受力分析

open access: yesGaoya dianqi, 2019
以型号为SFPSZ7-150000/220的变压器为例,建立三维三相磁—结构耦合模型,在三相短路的情况下,利用Ansys Maxwell软件进行瞬态电磁场仿真分析,分析绕组的单匝线圈的瞬态轴向力和辐向力,得出了绕组线圈随时间变化的瞬态轴向力和辐向力曲线,并总结了对应的规律:在A、B、C三相的高压绕组当中,位于A相第10分区的单匝线圈所受到的辐向合力为最大;在A、B、C三相的低压绕组当中,位于第7分区的三相绕组线圈中,B相绕组线圈受到的辐向力最小等这些结论。这将为对变压器在短路冲击下的累积效应 ...
李德波   +4 more
doaj  

The End of the Observable Infodemic: Privatised Observability and Public Health Monitoring

open access: yesPolicy &Internet, Volume 18, Issue 3, September 2026.
ABSTRACT Infodemiology and infodemic management rest on a premise so foundational that it is rarely stated: health information behaviour leaves traces that researchers and public institutions can observe. This paper argues that the premise is dissolving.
Christoph Dockweiler
wiley   +1 more source

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