Results 21 to 30 of about 14,496 (185)
Effect of multi-devascularization combined with Curcumin perfusion in the treatment of hepatic VX2 carcinoma in rabbit and on the residual carcinoma angiogenesis [PDF]
, 2015 目的：研究姜黄素和肝脏周围防粘连隔离膜包裹对经肝动脉、门静脉栓塞治疗VX2肝癌兔的肝功能和生存期的影响；碘化油栓塞肿瘤血管后的残癌组织内血管新生旺盛，本实验探讨姜黄素和肝周防粘连隔离膜包裹对栓塞后残癌组织血管新生的影响。 方法：40只新西兰大白兔随机分成4组，开腹接种法建立VX2肝癌模型。两周后开腹行肝动脉、门静脉置管术，其中B组、D组手术置管同时行肝周防粘连隔离膜包裹隔离术。手术一周后通过留置化疗泵给药，A组、B组：单纯碘化油栓塞剂，C组、D组：姜黄素和栓塞剂混合乳剂。即A组：肝动脉、门静脉置管 ...
徐政
core
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Lithium metal batteries (LMBs) promise ultrahigh energy density, yet their advancement is impeded by dendritic lithium growth and unstable interfacial behavior. Herein, for the first time, we present novel lithiophilic CoNiB quantum dots embedded in nitrogen‐doped hollow carbon nanorods (CoNiB@NC) as a multifunctional interlayer on a ...
Yu Wu +8 more
wiley +1 more source
Study on Corner-Fed Cavity-Backed Slot Dual-Polarized Antennas [PDF]
, 2015 为了在2.4GHz频段WLAN中实现具有方向性辐射的MIMO技术，采用背腔环形缝隙结构辐射元，通过倒置正交微带线激励，设计具有一定方向性的正交双极化天线结构。为提高端口间的隔离度和辐射场的极化纯度，在馈线正对的另一侧共面加载尺寸完全一致的接地或不接地导体带条。在此基础上，采用角馈的方法以期进一步改善天线的性能，并对各种可能天线形态进行对比分析。具体内容如下。 （1）对于边馈情形（即馈线位置垂直平分矩形导体腔表面的直角边），可以发现，没有加载导体条时，较佳隔离度对应的频带要高于阻抗工作频带，且相隔距离较大。
谢昇
core
International Journal of Urban and Regional Research, Volume 50, Issue 1, Page 191-220, January 2026.Abstract Henry George advocated for capturing land value increases for public ends. The active approach of public authorities organizing and financing land development can help capture higher land value increases, as Hartman and Spit indicate. However, this approach hardly happens in developing countries, where the coalition of private developers and ...
Nannan Xu
wiley +1 more source
Gaoya dianqi, 2021 800 kV高压交流隔离开关是我国西北电网750 kV输电线路重要的开关设备。文中在国内外高压开关设备研究的基础上,进一步对800 kV高压交流隔离开关进行理论分析研究,确定了800 kV高压交流隔离开关的技术方案及结构参数,建立了800 kV高压交流隔离开关三维模型并进行机械及绝缘特性仿真分析。研制出800 kV高压交流隔离开关样机并通过了型式试验的验证。通过仿真分析和型式试验研究得出,文中设计的800 kV高压交流隔离开关结构合理,机械特性和绝缘特性满足招标要求 ...
李宏楼 +11 more
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The study of bidirectional DC-DC converter in the DC microgrid [PDF]
, 2016 作为新能源的有效利用方式之一的直流微电网没有无功功率的损耗，不需要跟踪频率和相位，可靠性和可控性有较大程度的提高，更适合分布式能源的接入和应用。双向DC-DC变换器承担着母线与储能之间能量双向流动的重要作用。同时，它还可以作为直流微电网之间的互联元件，具有十分重要的研究价值。 本文针对全桥拓扑结构的双向DC-DC变换器展开较为深入的研究。 首先，详细分析了在移相控制方式下，双向DC-DC变换器的在降压方向和升压方向的工作原理及零电压开关（ZVS，Zerovoltageswitching）的具体过程 ...
纪承承
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Wildlife Letters, Volume 3, Issue 4, Page 161-172, December 2025.Swamp rabbit (Sulvilagus aquaticus) in southeast Missouri is increasing and expanding, with occupancy probabilities of 0.66 in 2010–2012 and 0.79 in 2021–2022. ABSTRACT Swamp rabbits (Sylvilagus aquaticus) are a bottomland hardwood specialist that have experienced range contraction at the northern and western extents of their range.
Thanchira Suriyamongkol +6 more
wiley +1 more source
Research and Design of High Isolation multipolarization MIMO Antennas [PDF]
, 2015 无线通信行业的蓬勃发展带来了频谱资源的日趋短缺，在现有的频谱资源上提高通信系统的传输速率和传输质量成为通信领域的研究重点。MIMO（Multiple-InputMultiple-Output，多入多出）可以在不增加发射功率和传输带宽的前提下，显著地提高系统的信道容量和频谱利用率，MIMO技术被认为是新一代无线通信系统中的革命性技术。当前，天线问题是限制MIMO技术发展的最大障碍之一。 本文在介绍MIMO天线的研究背景和意义，以及综述近年来国内外MIMO天线发展现状的基础上 ...
张斌
core
Finding floral and faunal species richness optima among active fire regimes
Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Changing fire regimes have important implications for biodiversity and challenge traditional conservation approaches that rely on historical conditions as proxies for ecological integrity. This historical‐centric approach becomes increasingly tenuous under climate change, necessitating direct tests of environmental impacts on biodiversity.
Zachary L. Steel +8 more
wiley +1 more source
Gaoya dianqi, 1959 目前电器工业中有逐漸以生产兩柱式戶外隔离开关来代替三柱式戶外隔离开关的趋势,西欧国家已紛纷生产南柱式隔离开关;捷克、波蘭等东欧人民民主国家也已生产兩柱式的隔离开关,苏联近年也正在逐步以兩柱式代替三柱式的,我国电力部門对这种新型的隔离开关也非常注意。本文就个人所見对兩柱式和三柱式隔离开关以及V型隔离开关作一分析此較。
章福民
doaj