Results 51 to 60 of about 26,958 (133)
New Phytologist, EarlyView.Biosynthesis and accumulation of tanshinones in the periderm of Salvia miltiorrhiza during secondary root growth. Summary Perennial herbs develop long‐lived roots that undergo repeated cycles of secondary growth, during which the periderm functions as a protective barrier and a major site of specialized metabolite accumulation.
Licheng Liu +19 more
wiley +1 more source
Gaoya dianqi, 2014 建立了大载荷电磁线圈发射器的数学模型,结合相似原理推导了原型发射器与缩比模型各动态特性参数间的相似关系。根据实验条件确定了原型与缩比模型的相似比例系数并建立了EMCLHL缩比模型,通过仿真计算得到的结果证明了原型和缩比模型动态特性规律呈比例关系,且满足模型设计条件中各物理量的相似比例关系,相似模型条件是成立的。
王旻, 曹延杰, 邹本贵, 黄达
doaj
Accountability in Government Use of AI: Citizen Concerns and Preferences
Public Administration, EarlyView.ABSTRACT Government adoption of AI opens the “pandora's box” of accountability, a core aspect of public value. Despite the centrality of governmental AI accountability, citizens' concerns and preferences in holding governments accountable for AI usage remain poorly understood.
Naikang Feng, Yanto Chandra
wiley +1 more source
四川大学学报. 自然科学版, 1987 对M340S计算机三个随机数发生器产生的(0,1)区间均匀分布的随机数进行了统计检验。结果表明:它们的均匀性、参数、正负速及升降连都在相同的显著水平α=0.05下通过价验;独立性相关系数检验则不同,有两种随机数在不同的显著水平α=0.05 和α=0.1下分别接受了不相关的假设,有一种在显著水平α=o.o5与α=0.1下均拒绝不相关的假设。通过大样本统计,给出了三种随机数的相关系数的数量级。最后为FORTRAN构造了一个使用更为方便的随机数发生器。
吴文凤
doaj
Public Administration, EarlyView.ABSTRACT As the public sector increasingly adopts AI‐powered automated decision systems (ADS), understanding how citizens experience and value ADS use in public decision‐making is both normatively and practically important. Therefore, we examine and compare the effects of seven attributes of public values on citizens' support for ADS adoption in two ...
Guimin Zheng +4 more
wiley +1 more source
Gaoya dianqi, 2015 为了通过电机电流检测隔离开关的机械故障,对GW6H-252型隔离开关电机输出轴扭矩和电机相电流的关系进行研究。研制出一套电流监测系统,现场监测隔离开关动作过程中电机定子相电流和电机输出轴扭矩,采用希尔伯特变换提取电流包络,建立电机输出轴扭矩和电流包络的函数关系,并采用最小二乘法进行曲线拟合。研究结果表明,GW6H-252型隔离开关电机输出轴扭矩和电机相电流包络之间存在二次函数关系,函数相关度高达0.98,因此可以通过监测电机定子相电流对电机输出轴扭矩峰值进行预测,进而检测隔离开关机械故障。
黄聿琛 +5 more
doaj
Resource Substitution: Local Governments' Issue Attention and Policy Reinvention
Policy Studies Journal, EarlyView.ABSTRACT Research on policy reinvention, where a government modifies rather than replicates policy innovations introduced by other governments, has progressed significantly, but how it is influenced by the government's issue attention has not been thoroughly examined.
Yingxin Zhang, Yixue Yao, Kaifeng Yang
wiley +1 more source
Shuitu Baochi Xuebao, 2017 以黄土丘陵区4种典型植物种群（狼牙刺、白羊草、铁杆蒿、达乌里胡枝子）为研究对象，采用野外采样、室内模拟试验与分析相结合的方法，对0—30 cm土层的各径级根系密度参数（根长密度、根体积密度、根表面积密度）与土壤理化性质、土壤分离速率间的关系进行了研究。结果表明：（1）4种植物的根系径级主要集中在0＜D≤1.0 mm之间，86%～93%的根长和46%～61%的根系表面积分布在此范围内，且根系径级越大，根系各密度参数越小；（2）4种植物各径级根密度参数对土壤理化性质（容重、有机质、团聚体）的影响各不相同 ...
葛芳红 +5 more
doaj
Designing Integrated Policies for the Twin Transition: Challenges and Tradeoffs
Policy Studies Journal, EarlyView.ABSTRACT Democratic governance faces the intertwined imperatives of managing the transformative risks and opportunities of digitalization, particularly stemming from artificial intelligence (AI), while achieving environmental sustainability within planetary boundaries.
Martino Maggetti
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Regional News, Regional Bias? Evidence From Media Discourses and Welfare Decisions in Germany
Policy Studies Journal, EarlyView.ABSTRACT How do media representations of immigrants shape their treatment by street‐level bureaucrats? Despite a uniform federal legal framework, decision‐making varies substantially across local welfare offices. Though prior research links national news reporting and policy implementation, little is known about how regional variation in news reporting
Stefanie Rueß
wiley +1 more source