Results 31 to 40 of about 14,950 (229)

Networking strategies for coordinating interdependent policy issues: A motif approach

open access: yesPolicy Studies Journal, EarlyView.
Abstract Complex societal challenges, such as climate change and environmental degradation, are encumbered by numerous interdependences across different policy issues. Coordination of interdependent policy issues is thus critical. However, coordination challenges persist, partly because coordinating interdependent policy issues among actors often ...
Johanna Hedlund   +2 more
wiley   +1 more source

Surface texture analysis for ultra-precision flycutting machining based on the dynamic characteristics of machine tools [PDF]

open access: yes, 2016
采用超精密飞切加工技术可获得软脆性平面光学元件的最终表面,而元件表面微观形貌的加工可控性对于光学元件使用性能有直接影响。首先运用多尺度小波分解方法,对飞切机床的加工表面波纹进行了特征提取,得到了工件表面波纹的频率组成及占比;然后通过对机床主轴系统的有限元分析,结合冲击振动测试,找到了与工件表面波纹对应的模态;最后通过对机床的在线振动测试及加工实验进一步明确了飞切加工表面微波纹的成因。结果表明:表面波纹在17 mm左右的空间周期上存在最大的分量,显著影响光学元件的精度和使用效果 ...
孙郅佶   +5 more
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The national costume pattern elements segmentation by incorporating morphology connected component and CV model(融合形态学连通域和CV 模型的民族服饰图案纹样元素分割方法)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2019
对民族服饰图案进行自动分割以提取图案纹样元素,是民族服饰图案素材库构建急需解决的难题。通过融合形态学连通域标记和CV 模型(MCC-CV),提出了一种民族服饰图案自动分割方法,首先对民族服饰图案进行预处理,然后采用形态学连通域标记算法获得待分割目标的位置和大致轮廓信息,对CV 模型进行初始化,最后通过CV 模型对不同分割目标进行边缘追踪,以实现民族服饰图案纹样元素的自动分割。实验表明,融合形态学连通域和CV 模型的民族服饰图案纹样元素自动分割方法在边界召回率(BR) 为0.5 时,分割准确率为 60 ...
HOUXiaogang(侯小刚)   +2 more
doaj   +1 more source

Relization of Malti-Doc/Malti-View in GIS based on MFC(一种基于MFC的GIS多文档多视图技术实现)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2005
针对GIS中数据分析与管理的多图层需要,在深入研究MFC类库框架结构、分析Windows应用程序开发流程的基础上提出了一种基于MFC的多文档多视图框架结构的解决方案,该方案不仅与MFC有着良好的继承、扩展和兼容性,可以快速地实现应用程序开发,而且又很好地实现了 GIS中图层管理的多文档多视图特点,满足了多源数据分析与管理的要求,实践表明这是一种可行的技术方案,
GUOXian-jie(郭宪杰)   +3 more
doaj   +1 more source

Transcriptomic profiling of dorsal root ganglia in atopic and healthy dogs: A comparative RNA sequencing study with implications in cutaneous itch research

open access: yesVeterinary Dermatology, EarlyView.
Background – Itch is a common symptom in skin disorders. While the neural pathways of itch transmission from the skin to the brain are well‐understood in rodents, the same pathways in dogs remain unclear. The knowledge gap hinders the development of effective treatments for canine itch‐related disorders.
Chie Tamamoto‐Mochizuki   +1 more
wiley   +1 more source

Study the performance EVAluation systerm ofChina Telecom Corporation Limited [PDF]

open access: yes, 2008
随着经济全球化和全球信息化的推进,社会对信息的依赖越来越大,信息的创造、加工、处理和传递成为经济增长的重要源泉,作为信息主要传递载体的电信业的战略地位也愈发重要。电信业作为国民经济的基础性产业和战略性产业,如何促进行业健康快速发展对国民经济而言具有十分重要的意义。我国的电信业在经过数次整合与重组后,形成了目前中国移动、中国电信、中国联通、中国网通、中国卫通、中国铁通等6家主要电信公司共存的格局。然而随着市场需求的变化和电信技术的革新,以中国电信为代表的传统固网运营商竞争优势日趋衰减 ...
宋磊
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Crouching Tiger, Hidden Dragon: An Offensive Realist Reconsideration of Philippine Grand Strategy

open access: yesAsian Politics &Policy, Volume 17, Issue 3, July 2025.
ABSTRACT In regions riddled with heightened security tensions from great power competition like Southeast Asia, why do states like the Philippines defy conventional rationality and hedge against their treaty ally? This paper seeks to answer this gap in the literature by arguing for a new definition of hedging that covers contemporary cases.
Jomari Jesus G. Tan
wiley   +1 more source

On solutions to the diuphantion equation (关于丢番图方程的解)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2005
丢番图方程是一种很重要的且引人注目的指数丢番图方程.用初等方法证明了,若f(x) = (g(x))2+a,a∈Q,这里g(x)是系数的最大分母为k的有理系数多项式,2r|| k,则该方程在2n时的解(x,y,n)必满足,从而给出了该类方程的解的上界,改进了参考文献中的一些结果.
YANGShi-chun(杨仕椿)
doaj   +1 more source

The Primate Name Yòu (狖) and Its Referents: Implications for the Future Conservation of François' Langurs in China 灵长类动物名称“狖”及其指代对象再钩沉: 对中国黑叶猴 (Trachypithecus francoisi) 未来保护的启迪

open access: yesIntegrative Conservation, Volume 4, Issue 2, Page 246-253, June 2025.
After the great Chinese poet Qu Yuan (屈原) was exiled to Xupu (溆浦) county in Hu' nan province, he described the forest there as follows: “mysterious is the deep forest, the place where Yuán yòu dwell (深林杳以冥冥兮,乃猿狖之所居).” What is the referent of the name Yuán yòu in this sentence?
Kefeng Niu
wiley   +1 more source

虚拟式多功能时频分析系统的研究与开发 [PDF]

open access: yes, 2003
介绍了典型的时频分析方法及所研发的虚拟式多功能时频分析系统。该仪器系统功能十分强大,主要包括:零相位数字滤波、短时付氏变换、多分辨时频分析、魏格纳分布、乔伊威廉斯分布、小波和小波包阈值滤波、二进小波及小波包正交分解、连续小波变换等。文中逐一介绍各主要功能的基本原理。给出了仪器的开发、设计、仿真及其应用实例。值得一提的是,在分析极大极小尺度共存信号时,作者所提出的多分辨时频分析方法比其它经典时频分析方法有明显的优势。国家863子项目(2002AA842180-1);; 集美大学科研启动基金 ...
纪跃波, 郭隐彪
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