Results 91 to 100 of about 17,267 (157)
野生动物学报, 1999 美国野生动物保护工作主要是在自然保护区和国家公园中进行的。自1903年美国在佛罗里达州Pelican岛建立了美国第一个野生动物自然保护区,美国野生动物保护区的历史已经经历了96个年头,野生动物保护区的数量已经超过500个。在美国的52个州中,每一个州至少有一个野生动物保护区。野生动物保护区所占的土地也由1903年的3英亩,增加到9200万英亩。在野生动物保护区内,700多种鸟类,220多种哺乳动物 ...
马建章, 罗理扬, 邹红菲
doaj
Protective effect of heme chloride on hypoxia-induced tissue injury in mice. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2023 Guo Q +5 more
europepmc +1 more source
Policy Studies Journal, EarlyView.ABSTRACT Based on the Punctuated Equilibrium Theory (PET) and implementation research, this study proposes an extended conceptualization of policy punctuation that enables researchers to systematically include policy implementation as part of a punctuation. The key mechanisms underlying the PET, i.e., policy image and venue, information processing, and
Bettina Stauffer
wiley +1 more source
与时俱进 开拓创新 努力把我国保护区事业推向新阶段——在全国自然保护区建设和管理工作会议上的讲话（节选）
野生动物学报, 2003 为进一步加快野生动物保护事业的发展,我国政府将野生动植物保护列为国家六大林业重点工程之一,组织实施“全国野生动植物保护及自然保护区建设工程”。为了更好地宣传此项工程,经研究决定,本刊从2003年第一期开始,在原定价不变的基础上增加8页,特设专栏,及时报道国家及各省野生动物保护管理工作和自然保护区建设的信息、动态、成就和经验,以配合国家有关部门加强对野生动物的保护宣传力度,加快自然保护区建设步伐。 相信在社会各界的大力支持和帮助下野生动物保护事业一定能够再创辉煌。
马福
doaj
Policy &Internet, Volume 18, Issue 2, June 2026.ABSTRACT In an era of proliferating but divergent data protection regimes, the European Union's rights‐based approach and China's sovereignty‐centric model have become two dominant poles of global data governance. This article examines how multinational enterprises navigate compliance under these dual systems and how that compliance is shaped through ...
Yiping Cao
wiley +1 more source
Dianci bileiqi, 2016 在大型建筑楼宇电气系统中,需要设置电涌过电压保护器（SPD）,对雷电或者其他瞬时过压的电涌进行保护。传统的建筑电气SPD电压保护装置采用本机振荡幅度调制的SPD电压保护器设计,但该设计装置会产生电涌过载失真,误差补偿性能。提出一种基于电压增益分配均衡处理的大型建筑电气SPD电压保护方法。进行了建筑电气SPD电压保护系统的等效电路设计,在SPD电压保护等效电路分析的基础上,构建SPD电压保护电力控制功率放大器,对SPD电压保护中出现较大偏差进行电磁耦合补偿 ...
李林琛
doaj
The Essence of Crisis Decision‐Making: Saving Ravenna During the 2023 Floods
Risk, Hazards &Crisis in Public Policy, Volume 17, Issue 2, June 2026.ABSTRACT This article explores decision‐making processes in crisis situations by proposing an interpretive framework grounded in multiple criteria of rationality. Crises, characterized by uncertainty, urgency, and ethical dilemmas, require critical choices that go beyond standard procedures.
Alexandra D'Angelo, Federico Toth
wiley +1 more source
A Global Analysis of Domestic Military Policies Governing Responses to Public Health Emergencies
World Medical &Health Policy, Volume 18, Issue 2, June 2026.ABSTRACT Throughout the COVID‐19 pandemic, militaries mobilized at an unprecedented scale to support domestic response efforts. This was consistent with the growing trend of asset mobilization for military operations other than war during public health emergencies.
Kuang Yu Hu +4 more
wiley +1 more source
Gaoya dianqi, 2018 半波长交流输电线路输送距离长、电压等级高,呈现出明显的分布参数特性,传统的继电保护原理不再适用。文中提出了一种高灵敏度、低灵敏度相配合的贝瑞隆差动保护改进算法,保护半波长交流输电线路的全长。其中低灵敏度贝瑞隆差动,用于保护半波长线路区内两端区域短路故障。高灵敏度贝瑞隆差动,用于保护半波长线路区内中间段区域短路故障。基于电磁暂态仿真软件PSCAD搭建特高压半波长输电线路仿真模型,并对提出的保护算法进行了大量的仿真实验。结果表明,低灵敏度贝瑞隆差动保护可以保证区内两端区域保护快速性 ...
陆金凤 +4 more
doaj
Application of hysteroscopy in female fertility preservation. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2022 Zhang L, Feng L.
europepmc +1 more source