Results 41 to 50 of about 19,637 (212)

Democratic Values in Citizen Participation: What Citizens Prioritize in Participation

open access: yesPolicy Studies Journal, EarlyView.
ABSTRACT Citizen participation is often initiated to strengthen democracy. While participatory innovations are typically assessed through normative frameworks emphasizing democratic values, little is known about which of these values are prioritized by citizens.
Take Sipma, Frank Hendriks
wiley   +1 more source

卡托普利对Aβ1-42诱导的痴呆模型大鼠记忆功能的影响

open access: yesZhongguo shiyan zhenduanxue, 2015
目的观察血管紧张素酶抑制剂(ACEI)类药物卡托普利对Aβ1-42诱导的阿尔茨海默痴呆模型大鼠的记忆能力,学习能力的影响以及相关机制的探究。方法把SD成年大鼠60只,随机分为,模型组和假手术组,其中模型组四个亚组各12只,假手术组12只。在各组鼠脑部两侧海马区注射Aβ1-42制作大鼠AD(Alzheimer disease)痴呆模型。假手术组,使用生理盐水注射到两侧海马区,作为对照。模型组为使用卡托普利按大、中、小剂量分三亚组和生理盐水亚组。假手术组不使用药物 ...
吴成吉   +5 more
doaj  

Test and Research on the Rheological Damage Properties of Sandstone under Dynamic stress field-Seepage field coupling [PDF]

open access: yes, 2016
机械振动、交通荷载、地震等产生的动应力场与降雨等因素所产生的渗流场耦合,会加快软岩的流变损伤,导致滑坡、崩塌、泥石流等严重的地质灾害。因此,加强对动应力场-渗流场耦合作用下软弱岩体的动态流变损伤特性的研究具有重要的理论和实际意义。论文以软弱砂岩为研究对象,利用重庆大学煤炭灾害与控制国家重点实验室的RLW-2000M煤岩三轴流变试验机研究了砂岩在动应力场-渗流场耦合作用下的动态流变损伤特性。具体的研究内容如下: (1)通过采集-钻芯-切割-打磨-浸泡等过程制备饱和的砂岩试样,根据砂岩试样的全应力 ...
蔡亮
core  

Nanofiltration Membranes for High‐Selectivity Separation of Li+ and Mg2+ From Salt Lake Brines: Strategies, Challenges, and Perspectives

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Against the backdrop of global clean energy transition and surging demand for lithium resources, lithium extraction from salt lakes presents unprecedented development opportunities. Nanofiltration (NF) membrane technology, recognized for its efficiency, energy savings, and environmental benefits, demonstrates significant application potential ...
Wen‐Feng Li   +5 more
wiley   +1 more source

On the aerodynamic model and the linear motion characteristics of the airship [PDF]

open access: yes, 2015
本文以飞艇为研究对象,在完成飞艇动力学建模过程中,除了考虑重力、 浮力、推力对飞艇的作用外,重点分析了俄罗斯、美国以及加拿大体系下的气 动力模型,比较了不同气动力结果的差异,进而讨论不同气动力成份对飞艇动 态特性的影响。所进行的研究工作主要包括以下几个方面: (1)飞艇动力学模型的建立。本文基于空间运动的坐标系、坐标变换矩阵 以及运动参数,推导了飞艇运动学方程和动力学方程,对飞艇受到的重力、浮 力、推力等进行了分析和建模。 (2)分析比较俄罗斯、美国、加拿大学者所采用的气动力估算方法。以 ...
刘玲
core  

In Situ Construction of S‐Scheme VIn‐Zn2In2S5/O‐Zn2In2S5 p–n Homojunctions for Enhanced Photocatalytic Hydrogen Evolution

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT The construction of p–n homojunctions represents a promising strategy for effective solar‐driven photocatalytic hydrogen evolution, owing to their inherent advantages of superior lattice matching and minimized charge transfer resistance. However, this approach remains largely unexplored.
Yueqiang Lin   +6 more
wiley   +1 more source

コウブンシノケッショウダンセイリツトビサイコウゾウニカンスルケンキュウ [PDF]

open access: yes, 1967
京都大学0048新制・論文博士工学博士論工博第133号新制||工||86(附属図書館)1509(主査)教授 桜田 一郎, 教授 堀尾 正雄, 教授 中島 章夫学位規則第5条第2項該当Kyoto ...
中前, 勝彦
core  

Hybrid Crisis Governance: A Systematic Review of Control‐Based and Collaborative Governance of the COVID‐19 Pandemic

open access: yesRisk, Hazards &Crisis in Public Policy, Volume 17, Issue 1, March 2026.
ABSTRACT Hybrid crisis governance – combining hierarchical control with networked collaboration – has gained increasing attention in the public policy and crisis management literatures. Yet, the concept of hybridity remains crude and underdefined, limiting its analytical utility.
Svante Aasbjerg Thygesen   +2 more
wiley   +1 more source

Experimental Investigation and Thermodynamic Calculation of Phase Equilibria in Some Cu-based Crystalline/Fe-based Amorphous Composites Systems [PDF]

open access: yes, 2015
非晶态合金材料因其高强度、高硬度和耐腐蚀等优异的物理化学性能,在基础科学和实际应用领域受到广泛的关注。然而,室温脆性的存在使非晶态合金材料的应用受到了限制。为了克服室温脆性,晶态/非晶态复合材料作为一种解决方案进入了科研工作者的视野。最近,利用多元合金体系中的液相两相分离现象制备晶态/非晶态复合材料被认为是一种简洁、有效的方法。为了有目的地利用液相两相分离现象制备晶态/非晶态复合材料,就需要建立多元合金体系的热力学数据库,进行材料成分设计。本研究作为Cu基晶态/非晶态复合材料的热力学数据库的重要组成部分,
黄文亮
core  

The coordination of dehydration tolerance and avoidance in oaks is mediated by leaf habit across a precipitation gradient

open access: yesFunctional Ecology, Volume 40, Issue 3, Page 750-763, March 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests worldwide are increasingly impacted by drought due to climate change, prompting plants to adapt through dehydration tolerance (DT) and avoidance (DA), two distinct physiological strategies.
Xingyun Liang   +11 more
wiley   +1 more source

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