Results 81 to 90 of about 106,323 (223)
Shuitu Baochi Xuebao, 2021 土壤水力参数是土壤水分和污染物迁移等陆面过程数值模拟的重要基础参数。为探明关中平原农田土壤水力参数空间分异特征，建立空间分布预测模型，在关中平原网格布设124个样点，采集根层0-20 cm原状和扰动土壤样品，利用van Genuchten模型拟合获取土壤水分特征曲线，获得残余含水量（θr）、饱和含水量（θs）以及系数α和n等土壤水力参数。采用经典统计学、地统计学和结构方程方法分析了θr、θs、α和n的空间变异特征及影响因子，建立了水力参数传递函数预测模型。结果表明：θr和α为强变异，θs为中等变异 ...
牛晓倩 +4 more
doaj
Standardization of Rational Bézier Surfaces [PDF]
, 2007 National audienceThe sufficient and necessary condition for the existence of linear Möbius transformations that can standardize the rational Bézier surfaces is given based on Möbius reparameterization theorem.
Yang, Yi-Jun, Yong, Jun-Hai
core +2 more sources
Basic income trials and the politics of scale: A research agenda
Policy Studies Journal, EarlyView.Abstract The growing popularity of basic income has led to extensive trials of the policy in numerous settings across the world. However, analysis of the politics of basic income, and in particular the political dynamics preceding and resulting from trial programs, lags. In response, we propose a research agenda that uses political scale to investigate
Jurgen De Wispelaere +2 more
wiley +1 more source
A systematic approach in analyzing sustained oscillations in an NF-kB signal transduction pathway system [PDF]
, 2010 Oscillation phenomenon is very common in biological systems. It is crucial to study oscillatory behaviors to understand gene regulation functions.
Lu, B. +2 more
core
Scientists in power plays: How substantive were scientists' narratives during the COVID‐19 pandemic?
Policy Studies Journal, EarlyView.Abstract Scientists who provide expert advice must engage with policy processes. Little is known about whether and how scientists deal with the political dynamics of policy processes that are inherent to policymaking. We study this question by building on the policy dimension concept within the Narrative Policy Framework.
Jule Ksinsik, Caroline Schlaufer
wiley +1 more source
Research on the Forming Grinding Technology of the typical Solid Carbide Mill with the Geometric Parameters Active Controlling [PDF]
, 2016 航空航天事业的飞速发展，对航空铝合金制品的需求日益增多，为此，“高精密、高效、高速”加工航空铝合金制品专用的硬质合金回转面刀具显得尤其重要。目前，在硬质合金刀具磨削工艺、刀具制造软件方面，我国与国际先进水平还存在较大差距，航空铝合金加工用硬质合金刀具技术与市场基本被国外占领，制约了我国刀具制造业的发展。 在此背景下，论文围绕航空铝合金加工专用硬质合金刀具磨削成形技术这一课题，以实现整体刀具高精度、高效加工为目标，对硬质合金刀具成形磨削软件开发进行研究，为我国刀具制造及工艺技术提供一定的理论支持 ...
吕颖
core
Policy Studies Journal, EarlyView.Abstract We examine whether and how public participation in policymaking contributes towards fostering stakeholder support for policy proposals formulated in the bureaucratic arena. We explain how key markers of procedural fairness describing both the participation process and policymakers' presentations of it during the decision justification stage co‐
Adriana Bunea, Idunn Nørbech
wiley +1 more source
Robustness analysis of signaling transduction networks based on Monte-Carlo method [PDF]
, 2007 The dynamic behaviors of cell system were deep ly affected by structural complexity of cell signal transduction networks and uncertainty of kinetics parameters.
Jia, J.F. +3 more
core
Policy Studies Journal, EarlyView.ABSTRACT Despite extensive research on policy diffusion, the ways in which policy attention influences this process remain underexplored. This study addressed this gap by distinguishing between three types of policy attention—political speeches, policy issuance and field visits—and investigating their differential impacts when delivered by central and ...
Xiangning Chen, Yahua Wang
wiley +1 more source
Gaoya dianqi, 2012 针对单级同步感应线圈炮系统中影响弹丸速度和系统效率的主要因素——驱动线圈和电枢的结构参数、电容器的电容和放电电压以及电枢的触发放电位置,笔者对不同结构参数的单级同步感应线圈炮物理模型进行有限元分析与仿真,得出各项结构参数对弹丸速度的影响规律,提出了一组最佳的结构参数并根据优化的结构参数进行了发射实验。仿真和实验结果均表明该结构参数可以有效地提高弹丸速度和系统效率。
邹本贵 +3 more
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