Results 41 to 50 of about 813,017 (152)

What's New Pussycat?—Explaining Public Acceptance of Disease Prevention and Control Measures for Pets

open access: yesEuropean Policy Analysis, Volume 12, Issue 3, Summer 2026.
ABSTRACT Public acceptance is essential for implementing effective health policies, especially in emotionally sensitive areas like companion animal care. This study investigates how policy design and implementation affect public acceptance of disease prevention and control measures for household pets in Switzerland.
Michelle Kim Emily Wyler
wiley   +1 more source

Peierls框架与裂纹尖端位错行为 [PDF]

open access: yes, 1994
本文在Peieris框架下对裂纹尖端位错成核与发射问题进行了严格的数学分析。在修正Rice设想的基础上;建立了一组新的控制方程。应力场与位错密度场分别表示成第一类与第二类切比雪夫多项式的级数。相应的张开位移与滑错位移可以用三角级数表示。通过离散的方法;控制方程转化为一组非线性代数方程。用Newton—Raphson方法求解这组方程;得到远场为纯剪、纯拉及两者复合情况下的解答 ...
王自强
core  

Dimensional Assembly Engineering of Ce‐MOF Interfaces for Selective Recognition of Phytic Acid

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Selective molecular recognition is central to chemical sensing yet discriminating structurally similar molecules at complex interfaces remains challenging. Traditional strategies based on tuning size, charge, or binding‐site chemistry often suffer from limited flexibility.
Qiang Miao   +7 more
wiley   +1 more source

高层混合结构中楼盖刚度对结构受力性能的影响分析

open access: yesJianzhu Gangjiegou Jinzhan, 2006
通过楼板将两种变形特性完全不同的结构体系连接而成混合结构,在受力性能上与框架结构、筒体结构既具有一定的联系,又有本质的区别。本文以一30层外部为钢框架、内部为混凝土核心筒组成的混合结构为例,采用通用有限元程序SAP2000分别计算了钢框架结构、混凝土筒体结构及混合结构,比较了三种结构体系的受力性能;通过调整楼板型式和板厚,探讨了楼板刚度对混合结构受力性能的影响。结果表明,采用混合结构使得结构变形、内力沿高度方向趋于均匀,受力性能得以改善;采用梁板体系能有效地减轻剪力滞后;随着楼板刚度的增加 ...
沈蒲生, 孟焕陵
doaj  

Who Deserves Scarce Health and Education Resources? How Policy Context Shapes Target Group Deservingness

open access: yesPolicy Studies Journal, Volume 54, Issue 2, May 2026.
ABSTRACT The social construction of target populations (SCTP) framework emphasizes the ways in which target populations' levels of political power and deservingness shape the allocation of policy benefits, but less attention has been devoted to the conditions under which the same target population may be considered deserving in one policy context but ...
Elizabeth Bell   +3 more
wiley   +1 more source

一种混合配体多孔铝金属有机框架材料及其制备方法

open access: yes, 2014
本发明涉及一种混合配体多孔铝金属有机框架材料及其制备方法,主要提供了一种具有混合配体并且孔结构可调的含铝金属有机框架材料及其制备方法。制备步骤如下:将反应物(无机铝盐和有机羧酸)溶解于有机溶剂中,再将上述混合溶液在温度为120~220℃条件下,晶化反应3~90小时,自然降温后取出,经过抽滤、洗涤、干燥和焙烧,制得具有多孔特性的金属有机框架材料。本发明制备工艺简单,成本低,能够在温和条件下制备出一种多孔铝金属有机框架材料。制得的具有混合配体的材料其结构可调,在吸附、分离、催化 ...
徐芬   +4 more
core  

钢梁-钢筋混凝土柱节点的研究及应用概况

open access: yesJianzhu Gangjiegou Jinzhan, 2004
近年来,在组合结构中出现了一种新型的结构形式,即由钢筋混凝土柱和钢梁(RCS)组成的框架结构。工程应用实践表明,梁柱采用两种不同的材料可以发挥材料各自的优点,从选材上具有合理性和经济性。作为主要传力部件的PCS节点是RCS框架研究的关键问题。本文较为系统地阐述了RCS节点在国内外的研究及应用情况,并指出了研究中存在的问题。
申红侠, 顾强
doaj  

Lessons learned from screening potential other effective area‐based conservation measures

open access: yesConservation Biology, Volume 40, Issue 2, April 2026.
Abstract Other effective area‐based conservation measures (OECMs) are sites that deliver effective biodiversity outcomes irrespective of their management objectives. These areas are widely expected to play an important role in efforts to protect 30% of Earth by 2030.
Carly N. Cook   +15 more
wiley   +1 more source

多孔金属有机框架化合物(MOFs)储氢材料及其储氢器研究与开发

open access: yes, 2011
多孔金属有机框架化合物(MOFs ...
孙立贤
core  

两层两跨组合钢框架抗火性能的试验研究

open access: yesJianzhu Gangjiegou Jinzhan, 2009
利用自行研制的火灾试验炉,对3榀两层两跨组合钢框架在不同火灾工况下的性能进行了试验研究,火灾工况包括:单室受火、同跨受火和底层受火三种工况,试验时,梁、板、柱同时受火,节点不受火。试验中量测了各种工况下的炉温,框架梁、柱及混凝土楼板中的温度分布及框架水平和竖向位移。结果表明:钢柱四面受火时,钢柱翼缘、腹板的温度相差很小;而单面受火时则相差较大;对于钢梁,除了与混凝土接触的上翼缘外,其余H型钢梁的裸露部分温度基本一致;混凝土内部的温升一般滞后于钢梁,钢筋混凝土板对钢梁有约束作用,升温时混凝土限制钢梁的膨胀,
董毓利
doaj  

Home - About - Disclaimer - Privacy