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Coalition Breakdown and Subsystem Exit
Policy Studies Journal, EarlyView.ABSTRACT Why actors choose to work together (or not) to advance policy has been the central area of inquiry within the Advocacy Coalition Framework (ACF). Existing research has mainly emphasized the pathway towards coalition formation and evolution, underscoring the stable patterns of allies and opponents observable in policy processes over a decade or
Charlie F. Thompson
wiley +1 more source
四川大学学报. 自然科学版, 2011 在小波变换轮廓术中,采用一维小波变换去解调变形结构条纹包含的物体面形分布时,小波处理所带来的误差分布同被测物体的面形分布及其变化率存在联系.为了减小小波变换轮廓术中相位提取的误差,从小波变换的相关实质出发,提出了利用神经网络的强大学习能力和函数逼近功能来校正相位.该方法以提取相位的一阶和二阶差分、小波尺度因子等相关计算量作为多层前馈型反向传播网络的输入,通过对复杂样本的训练,实现了输入与误差之间的非线性映射.计算机模拟和实验验证了用神经网络校正相位方法的有效性.
蒋模华, 陈文静, 郑志平
doaj
, 2011 相位误差的校正是傅里叶变换成像光谱仪数据处理的重要环节之 一。针对干涉曲线的对称性特征,利用相位相关性计算方法,提出一种新的傅里叶变换光谱数据的相位校正的方法。将相位相关性拟合为Sinc函数,计算亚像素 的偏移量,采用离散余弦变换转换到光谱域。使用标准光谱库中的源光谱数据作为原始数据,将通过离散余弦变换仿真的干涉数据与该方法得到的结果进行比较和验 证,并与Mertz方法进行了对比。结果表明:该方法精度优于Mertz方法,并且计算简单。
李玉山 +3 more
core
World Food Policy, Volume 12, Issue 2, November 2026.ABSTRACT Household food expenditure continues to be a key factor in ensuring the realization of the Human Right to Adequate Food. Particularly in Brazil, access to food can be limited by economic constraints in vulnerable families, especially among farming families, who have been more vulnerable to food insecurity in recent years in the country.
Lucas de Almeida Moura +3 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2006 目的筛查与脑胶质瘤发病相关基因的单核苷酸多态性,进一步寻找胶质瘤易感基因。方法收集入院脑胶质瘤病人的血液。应用PCR扩增的方法对肿瘤相关的基因的特定片段进行扩增。利用变性高效液相色谱技术进行筛查。双向DNA直接测序,在GENBANK进行对比找到突变的碱基,并进行分析。结果变性高效液相色谱筛查后表明,在HLA-DMA基因中检测到了已知杂和性突变,并发现新的突变,HLA-DMA4EC杂合性缺失突变。结论变性高效液相色谱技术在筛查基因的SNPs方面显示了其快速、高通量和准确的特点。HLA ...
徐保锋 +4 more
doaj
, 2014 本发明涉及一种相变控温防晒薄膜及其制备方法。其特征在于相变控温防晒薄膜是以微胶囊复合相变材料为智能控温成分，采用氧化锌、二氧化钛、银、氧化铝等纳米颗粒作为抗紫外线材料，以PVC、PET、PE等薄膜为基体材料塑化复合而成。本发明首先将基体材料的树脂粉，塑料助剂通过高速搅拌混炼成均匀稳定的增塑糊，然后加入微胶囊复合相变材料和纳米颗粒，继续搅拌混合均匀，最后通过涂敷成形、高温固化制备出具有较好相变储能特性和较高抗紫外线性能的新型相变控温防晒薄膜，该薄膜在可见光区的透过率可达65%，在紫外光区的透过率仅为10%
徐芬 +4 more
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Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT The intersection of immigration and welfare has taken a central stage in the politics of social policy and garnered increasing scholarly attention in welfare politics research. While prior research has examined how immigration affects welfare support and welfare generosity in the US, less is known about the determinants of immigrant‐related ...
Ping Xu, Ling Zhu, Sebastian Ege
wiley +1 more source
, 2015 本发明公开一种含水合物相变的固-液-气多相流动实验装置与测试方法，包括水合物沉积物颗粒粉碎机、混合仓、回收仓、混合物提升管道、气液固多相竖直输送管道、水力注入系统、测试系统和控制处理系统。本发明可以实验模拟水合物沉积物固体颗粒和热水的混合物由管道向上输送的物理过程，又能够测试水合物相变规律、气/液/固流动特征、多组分分离参数等，为水合物开采提供科学依据和技术支持。本发明在水合物开采方面提供新的实验系统和测试技术，在传热传质 ...
鲁晓兵, 张旭辉
core +2 more sources
Ba6Ti2Nb8O30和Sr6Ti2Nb8O30陶瓷的驰豫铁电性能
四川大学学报. 自然科学版, 2005 作者用固相烧结方法合成了具有充满型钨青铜结构的Ba6Ti2Nb8O30和Sr6Ti2Nb8O30陶瓷.不同频率下Ba6Ti2Nb8O30和Sr6Ti2Nb8O30陶瓷介电常数随温度的变化的规律表明,这两种陶瓷的铁电-顺电相变具有明显的驰豫铁电相变特征,相变弥散指数分别为1.95与1.41.它们在1MHz时的居里温度分别为155℃和160℃,两者的居里温度十分相近.同时,对其介电性能的电场可调性进行了初步研究.当外加电场为2kV/cm、频率为10kHz时 ...
袁媛, 陈湘明
doaj
Predictive evolutionary genomics: principles, validation, and practice
New 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